POWER ELECTRONICS for SMART GRIDS
|
|
- Rosalind Burns
- 8 years ago
- Views:
Transcription
1 POWER ELECTRONICS for SMART GRIDS A. Del Pizzo Dept. of Electrical Engineering University of Naples Federico II One Day Workshop SAE-NA -- Istituto Motori CNR - Napoli, November 8, /28
2 Outline Preliminary considerations Objectives of Smart Grids Basic power electronics elements Power electronics apparatuses One Day Workshop SAE-NA -- Istituto Motori CNR - Napoli, November 8, /28
3 Preliminary considerations Load complexity In the last decades the energy demand is continuosly increasing (both in industrialized and in emerging countries) and electrical loads are becoming more and more sophisticated. [20,300 terawatt-hours today to 33,000 terawatt-hours by 2030 in the world] Electrical drives and power electronics apparatuses for energy conversion are widely used; as a consequence, big problems of power quality occur on the modern distribution grids. 3/28
4 Preliminary considerations Grid complexity due to Distributed Generation In addition to the increased requirements and needs of end-users, the Distributed Generation (DG) has introduced very high levels of complexity in grid operation and management [even if well-accepted by the market] Together with : - Power quality - Efficiency of energy management a real problem is the Stability of networks having prevalent Distributed Generation architecture, especially when renewable energy sources are used. 4/28
5 One preliminary question is: Today s Grids Are they stupid or passive? Tomorrow s Grids Will they be smart or active? Answer: Today, some intelligence levels are already implemented. For example, ENEL considers its network the largest smart-grid currently active in the world Automatic Meter Management Telegestore is operating on about 32 Million of Customers Network automation - HV and MV network remotely operated. - More than MV substations remote controlled - Automatic procedures for fault clearing Asset Management Cartographic census of network assets Database of network events Optimization of network investments based on a risk analysis. We are going towards smarter grids (in a progressive way) 5/28
6 Expected transition: unidirectional energy flow, from central source to the distributed end-users Shift from today s to tomorrow s power grids two-way power flow of distributed generation Hierarchical power systems Smart Grid (future structure) Traditional structure 6/28
7 Shift from today s to tomorrow s power grids The Smart Grid is not a thing, not an object but it is an idea, a vision. Nevertheless, the Smart Grids could represent a revolution with respect to the traditional concept of a power system. This revolution will be made through a gradual transformation towards a more intelligent, more effective and environmentally sensitive network to provide for our future needs. The active management of power electrical networks needs large investments of Governements in Research and Development Projects, in order to accelerate the grid transformation process. Smart-Grids European Technology Platform (sponsored by the European Commission) is now the European effort in that direction. 7/28
8 Main feautures (and requirements) of a Smart Grid (the future electric network) Capacity: the demand for electrical energy has to be satisfied. Accessibility: the Renewable Energy Sources should have access to the Grid. Reliability: Efficiency: high quality electricity must be always available; no interruptions must occur. production, transportation and consumption of electricity must be efficient; efficiency is necessary in order to reduce gas emission (CO 2 ) and to obtain lower costs. Sustainability:Low-carbon energy-sources must be integrated into the system. Flexibility: it is necessary in order to meet the new consumers requirements, (e.g., their active participation in the electric energy generation or the fast and easy recharging procedure for road electrical vehicles). 8/28
9 An optimal smart grid should be able to: accept any kind of generation source; deliver power of any quality on demand; diagnose itself; heal itself through intelligent use of redundancies. Traditional Systems Centralized power generation One-directional power flow Generation follows load Operation based on historical experience Limited grid accessibility for new producers Smart Grids Centralized and distributed power generation Intermittent renewable power generation Multi-directional power flow Loads follows generation Operation based on real-time data Full and efficient grid accessibility Consumers participate in the market 9/28
10 MICROGRIDs A microgrid comprise medium- and/or low-voltage distribution systems with distributed energy sources, storage devices and controllable loads. They can operate either if connected to the main power network or if isolated (islanded) in a controlled and coordinated way. Frequently we refer to a selfsufficient interconnection of distributed generation, residential and industrial load in a low-voltage network without a persistent connection to a larger grid. Protection is a key challenge of Microgrids. When a fault occurs on the grid, the microgrid should be isolated from the main utility as quickly as possible to protect the microgrid loads. The creation of ad hoc microgrids by islanding pockets of a larger network has the potential to stop cascading outages while critical loads are online. There is a project, supported by EU ( More Microgrids ), finalized to identify and address the challenges of proliferation of microgrids in Europe. 10/28
11 TECHNOLOGIES used in SMART GRIDS In order to fulfill the above listed requirements, a suitable automation system is needed. It should be intelligent enough to correctly take into account generation profiles that may change with the weather and the time (like wind or photovoltaic generation). The result is a continuously changing distribution of power flow and direction, instead of the relatively stable, unidirectional power flow of a today distribution network. All these functions require many different technologies at the same time: very effective Sensors and Transducers together with Metering Systems in general; fast and reliable Information and Communication Technologies (ICTs); Power Conversion Systems able to rapidly and efficaciously adapt the values of voltage/current/power/energy according to the requests (these systems include electric generators, energy storage units, static power electronic converters) Power Electronics Apparatuses for filtering and for the operations devoted to maintain prefixed levels of power quality. 11/28
12 Power Electronics Power Conversion Systems for Smart Grids electric generators energy storage units static power electronic converters 12/28
13 Power Electronics Electric Generators Traditional electromechanical rotating generators: Synchronous machines (alternators) with excitated rotor; magnetically isotropy or salient pole, depending on the rotor speed Induction (Asynchronous) machines with squirrel-cage rotor, mainly operating on grids of prevalent power, with impressed voltage In the last year the attention has been mainly devoted to: Double-fed Induction (Asynchronous) machines with wound rotor, for medium-power wind generators Permanent Magnet (PM) synchronous generators for wind generators of small power and of very high power, for microcombined heat and power units [micro CHP], for UPS (Uninterruptible Power Systems) 13/28
14 Power Electronics Electric Generators Main Advantages of PM Synchronous Generators: High power density (kw/kg and kw/m 3 ) Absence of ring-brush contacts (they are brushless) Possibility to be operated as Direct Drive (no-gear) or to maintain good performance at low speed High efficiency Main drawbacks: No variability of rotor exciting field Constructive problems to fix the magnets on the rotor Cost Temperature at rated operations (demagnetization can occur) 14/28
15 Power Electronics Magnetic configurations of PM Synchronous Generators: The magnets can be mounted either externally or internally to the rotor (correspondently, we have the Surface mounted PM generators or Interior PM Generators ) S N N S S N The stator is mainly three-phase with low and/or high pole-pair number, as requested by the specific application In some cases the stator can be multi-phase; for small power (few kw), the stator can be single-phase The topology can be Radial flux (most part of solutions) or Axial flux AVVOLGIMENTI DISCO ROTORICO N S S ALBERO MAGNETI N NUCLEO STATORICO 15/28
16 Power Electronics Energy Storage Units Main components: Batteries High-Speed Flying Wheels SuperCapacitors Further needed components: Power electronic converters to drive and control the storage unit (e.g. a DC-DC bi-directional converter for connect he battery to a dc-link). 16/28
17 Power Electronics Static Power Electronic Converters Power switching devices Basic Converter Topologies Main power electronic apparatuses for smart grids continua continua continua continua 17/28
18 Static Power Electronic Converters Power Electronics Power switching devices MOSFET (Metal Oxide Semiconductor Field-Effect Transistor) for low voltage, low power (until some tens of kw) 100V/200A or 500 V/20A D Drain N-Channel - MOSFET D + D + Collettore C IGBT C Collettore Gate G Isolante N P G v DS G v GS v GS S Source S S (a) (b) (c) v DS G Gate v GE Emettitore E v CE G Gate v GE E v CE Emettitore IGBT (Insulated Gate Bipolar Transistor) for a wide range of power (some kw until some MW); until 4.5 kv GCT (Gate Commutated Turn-off Thyristor) or IGCT (Integrated Gate Commutated Thyristor) for high voltage, high power (several MW), 5kA, 10 kv. 18/28
19 DC-DC Conversion Basic Converter Topologies Usually the dc-dc converters are called chopper Chopper step-down ( buck ) Chopper step-up ( boost ) Chopper buck-boost i 1 T i 2 Load v 1 D v 2 continua continua Power Electronics continua continua i 1 D T Load v 1 L C v 2 i 2 With respect to the energy-flow, Choppers can be uni-directional (one quadrant) or bidirectional (four-quadrant) Application fields of choppers: Connecting a supercap to a d.c.-bus; Connecting a battery to a d.c.-bus; Connecting a fuel-cell to a d.c.-bus at a fixed voltage; Connecting a PhotoVoltaic plant to a d.c.-bus at impressed voltage; Connecting a stabilized d.c.-bus to the output of a rectifier placed on the armature of a synchronous generator in wind plants; Supplying d.c.-motors at variable speeds; All the connections of two lines in d.c., even when one (input or output)voltage has to be constant; 19/28
20 Basic Converter Topologies Power Electronics DC-AC Conversion Usually the d.c.-a.c. converters are called inverter continua continua continua continua Today, the most part of inverters are VSI (Voltage Source Inverter); CSI-Current Source Inverters are not frequently used. PWM (Pulse Wide Modulation) Inverters are practically always used, instead of the sixstep inverters with rectangular voltages; frequently PWM-VSI inverters are three-phase. + K T 1 T 2 T 3 V C A D1 2 B D D 3 i 1 C T 1' T 2' T 3' i 2 i 3 M H With respect to the energy-flow, Inverters are intrinsically bi-directional Application fields of inverters: Connecting a d.c.-bus to an a.c. grid (e.g. in P.V. plants, or in Wind plants, ); - D1' D 2' D 3' Supplying a.c.-motors at variable speed (induction motors, synchronous motors, brushless motors); 20/28
21 Basic Converter Topologies Power Electronics DC-AC Conversion in the last years sometimes inverters are multi-phase (n ph >3); this configuration can be used either for supplying multi-phase loads, or to supply different three/single-phase loads at reduced losses, or to improve reliability when this is very important; moreover, there are many multi-level inverters, i.e. inverters with more than 2 voltage levels; these configurations have been introduced especially for the cases where requested voltage and/or power are over the limits of the switching devices available on the market now multi-level inverters are used also to improve energy performance in terms of reduction of ripples in currents and voltage, with the aim to improve some important power-quality indexes; some multilevel topologies are also fault-tolerant, i.e. able to improve reliability of the conversion unit, because in case of fault they continue to supply the load, even if at reduced power there are many different topologies of multilevel inverters; the diode-clamped ones are now the most common; the cascaded H-bridge appear to be more interesting for control the power quality continua continua continua continua 21/28
22 Basic Converter Topologies Power Electronics DC-AC Conversion Multilevel topologies of PWM-VSI Inverters = E V 1 C 1 V A1 A T A1 C 1 D b T A2 = E V 2 C 2 V A2 V AO V O D b' T A1' A B C C 2 T A2' C m-1 V m-1 = E V A(m-1) O Diode-Clamped A B C V A1 0 V A2 T/2 T Cascaded H-Bridge 0 V A3 T/2 T 0 V A4 0 V A0 4E T/2 T/2 T T 0 T/2 T -4E 22/28
23 AC-DC Conversion Basic Converter Topologies Power Electronics A direct a.c./d.c. converter is generally called rectifier ; it can be not controlled (using only diodes); partially-controlled (diodes+thyristors) or totally-controlled (all thyristors). I a V a V M a ~ ~ L s T T 2 T T T T L s I a V M continua contin contin T 4 T 5 T 6 The a.c./d.c. conversion can be made also in two stages, using a not-controlled rectified followed in cascade by a chopper in order to vary the output voltage level. Instead of traditional rectifiers, now we can use also the Voltage Source Rectifier (VSR) which is composed by controlled switching devices (e.g. IGBT); the structure is equal to the one of an inverter (VSI, for this reason it is not shown here), but the power flow is in opposite sense. They are also called Active Front End (AFE). These VSRs have not only the basic function of conversion a.c./d.c., but they can have additional features: they are able to keep constant the voltage on the capacitors in the dc-link, to ensure a power-factor very close to 1, to sensibly reduce the harmonic content of the currents; frequently these active front-ends have multi-level topology. The VSRs are more economical used in a range of medium-low power (until some hundreds of kw) 23/28
24 Basic Converter Topologies Power Electronics continua cont AC-AC Conversion Usually the a.c./a.c. conversion is made in two (or more) stages in cascade; i.e. an a.c./d.c. conversion followed by a d.c./a.c. one. ~ raddrizzatore + controllato - = C V.S.I. 6 - step M (a) cont ~ raddrizzatore a diodi = = In the last years there is a growing interest for Matrix converters, which are a.c./a.c. converters of direct type, frequenza because fissa they carry out the frequenza conversion variabile in only one step; they have the advantage that can avoid the passage in d.c., especially important when the environmental conditions are dangerouscicloconvertitore for capacitors. Convertitore a matrice + chopper - a) Convertitore diretto (monostadio) ~ ~ C V.S.I. 6 - step M (b) b) Convertitore indiretto (pluristadio) 24/28
25 Basic Converter Topologies Power Electronics Filtering and Power Quality improvement Together with classical passive filters (capacitor banks or reactors), we can use active filters which are based on the use of power electronic converters together with inductors and/or ~ = capacitors. raddrizzatore + V.S.I. controllato C 6 - step (a) Active filters can be placed in series or in parallel to the line. In a.c. grids the FACTS (Flexible AC Transmission = Systems) = increase the capacity of the grid, improve quality indexes and improve stability. raddrizzatore + chopper C (b) STATCOM (Static Compensators of reactive power). frequenza fissa ~ a diodi - a) Convertitore diretto (monostadio) Static Compensators of reactive power (SVC Static VAR Compensator); they are based on the presence of Li-ion batteries that can dinamically storage the energy. Cicloconvertitore ~ ~ - frequenza variabile V.S.I. 6 - step Convertitore a matrice M M Voltage and VAR Optimized control (VVO) is performed by apparatuses which includes transformers with proper tap changers (in order to regulate the voltage) and compensators of reactive power; the control algorithms implemented in the microcontroller try the optimum value of voltage that can be combined with the VAR data. b) Convertitore indiretto (pluristadio) 25/28
26 Filtering and Power Quality improvement Power Electronics TCR TSC AT L L c MT C F T 1 T 2 VSC T 1 T 2 C Voltage Source Converter Thyristor Controlled Reactor Thyristor Switched Capacitor C Fig. 6- Schema di principio di uno Statcom L c L c L L F L F Fig. 7- Schema unifilare di uno Statcom a 3 livelli C F C F TSC C TSC C TCR Fig. 3 - StatVar combinato con filtri LC. 2-level STATCOM 26/28
27 Filtering and Power Quality improvement Power Electronics Fig. 11 SSSR Static Synchronous Series Compensator Fig. 11 DVR Dynamic Voltage Restorer Fig. 12 UPFC Unified Power Flow Controller Fig. 13 IPFC Interline Power Flow Controller 27/28
28 Power Electronic Transformer in Medium Frequency Power Electronics LV Inverter i s1 MV Rectifier-Inverter H-Bridge - 1 st module (a) MV Rectifier-Inverter H-Bridge 1 st module (b) v dc,1 PV v dc,2 PV i p1 v p1 v s 1 i p2 v p2 v s 2 i s2 H-Bridge - 10 th module H-Bridge - 1 st module i L1 R L GRID L L v L1 LV Inverter v dc,1 PV v dc,2 MF Transformer H-Bridge -10 th module H-Bridge - 1 st module i L1 R L GRID L L v L1 v dc,3 i L2 i L3 v L2 v L3 O PV v p v s i L2 i L3 v L2 v L3 O PV i p3 v p3 v s 3 v dc,3 H-Bridge - 10 th module H-Bridge - 10 th module MF Transformers i s3 H-Bridge - 1 st module PV H-Bridge 1 st module H-Bridge - 10 th module H-Bridge 10 th module LV Inverter MF Transformer PV v dc,1 v H-B1 p,1 i p MV Rectifier C 1 MV Inverter i L1 R GRID L L v L L1 v p v s NPC singlephase NPC threephase i L2 i L3 v L2 v L3 O C Ns PV v dc,n H-B N v p,n Fig. 3. Schematic representation of a PET with a N-level inverter on LV side (cascaded H-bridge) and a N -level NPC converter on MV side. 28/28
Renewable Energy Applications: Photovoltaic and Wind Energy Conversion Systems (WECS)
Renewable Energy Applications: Photovoltaic and Wind Energy Conversion Systems (WECS) Josep Pou Antoni Arias Page 1 Outline 1. Renewable Energy Perspectives 2. Solar Photovoltaic (PV) 3. Wind Generation
More informationHigh-Megawatt Converter Technology Workshop for Coal-Gas Based Fuel Cell Power Plants January 24, 2007 at NIST
Session 4a Enjeti 1 High-Megawatt Converter Technology Workshop for Coal-Gas Based Fuel Cell Power Plants January 24, 2007 at NIST Dr. Prasad Enjeti TI TI Professor Power Electronics Laboratory College
More informationCOMPARISON OF THE FACTS EQUIPMENT OPERATION IN TRANSMISSION AND DISTRIBUTION SYSTEMS
COMPARISON OF THE FACTS EQUIPMENT OPERATION IN TRANSMISSION AND DISTRIBUTION SYSTEMS Afshin LASHKAR ARA Azad University of Dezfoul - Iran A_lashkarara@hotmail.com Seyed Ali NABAVI NIAKI University of Mazandaran
More informationPrinciples of Adjustable Frequency Drives
What is an Adjustable Frequency Drive? An adjustable frequency drive is a system for controlling the speed of an AC motor by controlling the frequency of the power supplied to the motor. A basic adjustable
More informationControl Development and Modeling for Flexible DC Grids in Modelica
Control Development and Modeling for Flexible DC Grids in Modelica Andreas Olenmark 1 Jens Sloth 2 Anna Johnsson 3 Carl Wilhelmsson 3 Jörgen Svensson 4 1 One Nordic AB, Sweden, andreas.olenmark@one-nordic.se.
More informationFundamentals of Power Electronics. Robert W. Erickson University of Colorado, Boulder
Robert W. Erickson University of Colorado, Boulder 1 1.1. Introduction to power processing 1.2. Some applications of power electronics 1.3. Elements of power electronics Summary of the course 2 1.1 Introduction
More informationA MULTILEVEL INVERTER FOR SYNCHRONIZING THE GRID WITH RENEWABLE ENERGY SOURCES BY IMPLEMENTING BATTERY CUM DC-DC CONERTER
A MULTILEVEL INVERTER FOR SYNCHRONIZING THE GRID WITH RENEWABLE ENERGY SOURCES BY IMPLEMENTING BATTERY CUM DC-DC CONERTER 1 KARUNYA CHRISTOBAL LYDIA. S, 2 SHANMUGASUNDARI. A, 3 ANANDHI.Y 1,2,3 Electrical
More informationAlternative and Renewable Energy Systems
Alternative and Renewable Energy Systems Known as the standard for technical training systems in use across virtually every industry and around the globe, Lab-Volt is now using its expertise to provide
More informationWIND TURBINE TECHNOLOGY
Module 2.2-2 WIND TURBINE TECHNOLOGY Electrical System Gerhard J. Gerdes Workshop on Renewable Energies November 14-25, 2005 Nadi, Republic of the Fiji Islands Contents Module 2.2 Types of generator systems
More informationVariable Frequency Drives - a Comparison of VSI versus LCI Systems
Variable Frequency Drives - a Comparison of VSI versus LCI Systems Introduction TMEIC is a leader in the innovative design and manufacture of large ac variable f requency drive systems. TMEIC has been
More informationSmart Grid and Renewable Energy Grid Integration. Jian Sun, Professor and Director Department of ECSE & Center for Future Energy Systems
Smart Grid and Renewable Energy Grid Integration Jian Sun, Professor and Director Department of ECSE & Center for Future Energy Systems 1 How Smart Can We Make This Grid? 2 Smart Grid Drivers Need to Use
More informationModeling and Simulation of a Novel Switched Reluctance Motor Drive System with Power Factor Improvement
American Journal of Applied Sciences 3 (1): 1649-1654, 2006 ISSN 1546-9239 2006 Science Publications Modeling and Simulation of a Novel Switched Reluctance Motor Drive System with Power Factor Improvement
More informationISPS2014 Workshop Energy to Smart Grids Presenting results of ENIAC project: E2SG (Energy to Smart Grid)
ISPS2014 Workshop Energy to Smart Grids Presenting results of ENIAC project: E2SG (Energy to Smart Grid) Bidirectional isolating AC/DC converter for coupling DC grids with the AC mains based on a modular
More informationRelationship between large subject matter areas
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER;
More informationGreen Energy Solutions
Green Energy Solutions Power Electronics for Photovoltaic Inverter Systems 1 Energy Management Product Line-up Energy Management Product Line-up Power Conversion and Stabilization Frequency Converter Static
More informationHVDC-VSC: transmission technology of the future
A bi-pole ± 285 kv HVDC line sandwiched between 3-phase 400 kv HVAC lines. HVDC-VSC: transmission technology of the future A new hybrid HVDC circuit technology using voltage source converters is only half
More informationAsia Pacific Regional Power Quality Seminar 28-31 March 2005, Marriot Putrajaya, Malaysia. Voltage Source Converter based Power Quality Solutions
Asia Pacific Regional Power Quality Seminar 28-31 March 2005, Marriot Putrajaya, Malaysia Voltage Source Converter based Power Quality Solutions Olivier Suter ABB Holdings Sdn. Bhd., Div. APAN Automation
More informationTransformerless UPS systems and the 9900 By: John Steele, EIT Engineering Manager
Transformerless UPS systems and the 9900 By: John Steele, EIT Engineering Manager Introduction There is a growing trend in the UPS industry to create a highly efficient, more lightweight and smaller UPS
More informationFuture grid infrastructure Field tests of LVDC distribution
Future grid infrastructure Field tests of LVDC distribution LUT LVDC Research Group: Andrey Lana, Pasi Nuutinen, Antti Pinomaa, Tero Kaipia, Pasi Peltoniemi, Aleksi Mattsson, Jarmo Partanen Introduction
More informationCYCLOCONVERTERS. Fig.1 Block diagram of a cycloconverter
CYCLOCONVERTERS Burak Ozpineci, Leon M. Tolbert Department of Electrical and Computer Engineering University of Tennessee-Knoxville Knoxville, TN 37996-2100 In industrial applications, two forms of electrical
More informationThe design and performance of Static Var Compensators for particle accelerators
CERN-ACC-2015-0104 Karsten.Kahle@cern.ch The design and performance of Static Var Compensators for particle accelerators Karsten Kahle, Francisco R. Blánquez, Charles-Mathieu Genton CERN, Geneva, Switzerland,
More informationAnais Volume 1 COBEP99 UFPR UFSM
COBEP99 UFPR UFSM 5 e Congresso Brasileiro de Eletronica de Potencia The 5~ Brazilian Power Electronics Conference Foz do Iguagu, Parana, Brasil 19 a 23 de setembro de 1999 Anais Volume 1 UB/TIB Hannover
More informationTopics. HVDC Fundamentals
Topics HVDC Fundamentals Conventional Converters Capacitor Commutated Converters Voltage Source Converters Reactive Power Requirements System Configurations Tapping Control basics High Power Transmission
More information2012 San Francisco Colloquium
2012 San Francisco Colloquium http : //www.cigre.org HVDC and Power Electronic Systems for Overhead Line and Insulated Cable Applications B4-8 Trans Bay Cable A Breakthrough of VSC Multilevel Converters
More informationHigh Intensify Interleaved Converter for Renewable Energy Resources
High Intensify Interleaved Converter for Renewable Energy Resources K. Muthiah 1, S.Manivel 2, Gowthaman.N 3 1 PG Scholar, Jay Shriram Group of Institutions,Tirupur 2 Assistant Professor, Jay Shriram Group
More informationSolar Power Plant Design and Interconnection
Solar Power Plant Design and Interconnection Wind & Solar Super Session July 27, 2011 E.H. Camm, S.E. Williams S&C Electric Company Outline Introduction Utility-scale PV power plant Grounding Reactive
More information*ADVANCED ELECTRIC GENERATOR & CONTROL FOR HIGH SPEED MICRO/MINI TURBINE BASED POWER SYSTEMS
*ADVANCED ELECTRIC GENERATOR & CONTROL FOR HIGH SPEED MICRO/MINI TURBINE BASED POWER SYSTEMS Jay Vaidya, President Electrodynamics Associates, Inc. 409 Eastbridge Drive, Oviedo, FL 32765 and Earl Gregory,
More informationRenewable Energy Grid Integration
Renewable Energy Grid Integration Jian Sun Professor and Director Grid Integration Issues Cost, Reliability & Efficiency of Grid Interface Grid Congestion, Weak Grids Variability of Renewable Production
More informationWhat Is Regeneration?
What Is Regeneration? Braking / Regeneration Manual Regeneration Overview Revision 1.0 When the rotor of an induction motor turns slower than the speed set by the applied frequency, the motor is transforming
More informationPower Electronics Technology Trends and Prospects
Power Electronics Technology Trends and Prospects Hidetoshi Umida 1. Introduction Power electronic devices have achieved higher performance by using new technologies such as power transistors, IGBTs (Insulated
More informationOverview brochure. Energy Storage Keeping smart grids in balance
Overview brochure Energy Storage Keeping smart grids in balance Reliable power, where and when it s needed Energy storage is not a new concept in itself. It has been an integral component of electricity
More informationELECTRICAL ENGINEERING
ELECTRICAL ENGINEERING The master degree programme of Teacher Training in Electronical Engineering is designed to develop graduates competencies in the field of Curriculum Development and Instructional
More informationSIMULATION AND ASSESSMENT OF SINGLE PHASE SEMI-Z-SOURCE INVERTER (S-ZSI)
International Journal of Electrical Engineering & Technology (IJEET) Volume 7, Issue 1, Jan-Feb, 2016, pp.30-34, Article ID: IJEET_07_01_003 Available online at http:// http://www.iaeme.com/ijeet/issues.asp?jtype=ijeet&vtype=7&itype=1
More informationProject description. Power Electronics for Reliable and Energy efficient Renewable Energy Systems
Project description Title: Power Electronics for Reliable and Energy efficient Renewable Energy Systems OBJECTIVES Principal objective Provide competence and decision basis for enabling reliable and energy
More informationFREQUENCY CONTROLLED AC MOTOR DRIVE
FREQUENCY CONTROLLED AC MOTOR DRIVE 1.0 Features of Standard AC Motors The squirrel cage induction motor is the electrical motor motor type most widely used in industry. This leading position results mainly
More informationFACTS. Solutions to optimise network performance GRID
Solutions to optimise network performance GRID Solutions to optimise your network Our worldwide presence: Better solutions for your network all around the world Tampere Philadelphia Stafford Konstanz Beijing
More informationDesign of Four Input Buck-Boost DC-DC Converter for Renewable Energy Application
Design of Four Input Buck-Boost DC-DC Converter for Renewable Energy Application A.Thiyagarajan Assistant Professor, Department of Electrical and Electronics Engineering Karpagam Institute of Technology
More informationSolar Energy Conversion using MIAC. by Tharowat Mohamed Ali, May 2011
Solar Energy Conversion using MIAC by Tharowat Mohamed Ali, May 2011 Abstract This work introduces an approach to the design of a boost converter for a photovoltaic (PV) system using the MIAC. The converter
More informationPOWER TRANSMISSION FROM OFFSHORE WIND FARMS
POWER TRNSMISSION FROM OFFSHORE WIND FRMS Thorsten Völker University of pplied Sciences Bremerhaven Germany BSTRCT The future for wind power generation in Germany is offshore wind energy. The preferred
More informationHitachi s Smart Grid Technologies for Smart Cities
Hitachi s Smart Grid Technologies for Smart Cities Hitachi Review Vol. 61 (2012), No. 3 134 Atsushi Nishioka Hiroo Horii, P.E.Jp Yuka Saito Shigeru Tamura, Dr. Eng. OVERVIEW: Prompted by the problem of
More informationAC/DC Power Supply Reference Design. Advanced SMPS Applications using the dspic DSC SMPS Family
AC/DC Power Supply Reference Design Advanced SMPS Applications using the dspic DSC SMPS Family dspic30f SMPS Family Excellent for Digital Power Conversion Internal hi-res PWM Internal high speed ADC Internal
More information98% Efficient Single-Stage AC/DC Converter Topologies
16 POWER CONVERTERS www.teslaco.com 98% Efficient Single-Stage AC/DC Converter Topologies A new Hybrid Switching Method is introduced in this article which for the first time makes possible AC/DC power
More informationDesign and Simulation of Z-Source Inverter for Brushless DC Motor Drive
Science Arena Publications Specialty Journal of Electronic and Computer Sciences Available online at www.sciarena.com 2015, Vol, 1 (1): 30-34 Design and Simulation of Z-Source Inverter for Brushless DC
More informationMedium voltage products. Technical guide Smart grids
Medium voltage products Technical guide Smart grids Contents 2 1. Introduction 8 2 The different components and functions of a smart grid 8 2.1 Integration of distributed renewable energy sources 9 2.2
More informationDesign And Implementation Of Seven Level Inverter With Solar Energy Genration System
Ravula Sateesh,B.Venugopal Reddy 195 Design And Implementation Of Seven Level Inverter With Solar Energy Genration System RAVULA SATEESH 1 B.VENUGOPAL REDDY 2 EMAIL: r.sateeshsrinivas@gmail.com EMAIL:venugopal1729reddy@gmail.com
More informationModeling Grid Connection for Solar and Wind Energy
1 Modeling Grid Connection for Solar and Wind Energy P. J. van Duijsen, Simulation Research, The Netherlands Frank Chen, Pitotech, Taiwan Abstract Modeling of grid connected converters for solar and wind
More informationPSE 6031 SYLLABUS (Tentative)
PSE 6031 SYLLABUS (Tentative) Power Electronics (3 credits) Friday Afternoon: 1:00-3:00 PM 15 Virtual Class Meetings (no face-face meetings) Pre-requisites: All coursework to qualify for the upper division
More informationSECTION 4 ELECTRIC MOTORS UNIT 17: TYPES OF ELECTRIC MOTORS
SECTION 4 ELECTRIC MOTORS UNIT 17: TYPES OF ELECTRIC MOTORS UNIT OBJECTIVES After studying this unit, the reader should be able to Describe the different types of open single-phase motors used to drive
More informationChapter 6: Converter circuits
Chapter 6. Converter Circuits 6.. Circuit manipulations 6.2. A short list of converters 6.3. Transformer isolation 6.4. Converter evaluation and design 6.5. Summary of key points Where do the boost, buck-boost,
More informationPROGRAM CRITERIA FOR ELECTRICAL ENGINEERING TECHNOLOGY
PROGRAM CRITERIA FOR ELECTRICAL ENGINEERING TECHNOLOGY Scope These program criteria apply to programs having titles involving Electrical Engineering Technology including: electrical engineering, electrical
More informationKeywords power converter, solid-state, power distribution, FACTS
SOLID-STATE HIGH FREQUENCY POWER CONVERTERS Ian S. Roth, Marcel P.J. Gaudreau, Michael A. Kempkes, Timothy J. Hawkey, J. Michael Mulvaney Diversified Technologies, Inc. Bedford, MA USA Abstract In a recently
More informationKnowing the FACTS. FACTS that enhance power quality in rail feeder systems
Knowing the FACTS FACTS that enhance power quality in rail feeder systems ROLF GRÜNBAUM, PER HALVARSSON, BJÖRN THORVALDSSON The increase in traffic on existing tracks combined with new high-speed rail
More informationParametric variation analysis of CUK converter for constant voltage applications
ISSN (Print) : 232 3765 (An ISO 3297: 27 Certified Organization) Vol. 3, Issue 2, February 214 Parametric variation analysis of CUK converter for constant voltage applications Rheesabh Dwivedi 1, Vinay
More informationTotally Integrated Power SIESTORAGE. The modular energy storage system for a reliable power supply. www.siemens.com/siestorage
Totally Integrated Power SIESTORAGE The modular energy storage system for a reliable power supply www.siemens.com/siestorage Totally Integrated Power (TIP) We bring power to the point. Our products, systems,
More informationIXAN0052 IXAN0052. New Power Electronic Components for Materials Handling Drive. Systems. Andreas Lindemann. IXYS Semiconductor GmbH
New Power Electronic Components for Materials Handling Drive Systems Andreas Lindemann IXYS Semiconductor GmbH Postfach 1180, D { 68619 Lampertheim www.ixys.net There is a variety of drives in lift trucks
More informationMaking a world of difference. Turbocor centrifugal compressors for air-conditioning systems
Making a world of difference Turbocor centrifugal compressors for air-conditioning systems Leading a new era in performance Today, the world is looking for HVAC technology that makes a difference in efficiency,
More informationIntroduction to Power Supplies
Introduction to Power Supplies INTRODUCTION Virtually every piece of electronic equipment e g computers and their peripherals calculators TV and hi-fi equipment and instruments is powered from a DC power
More informationDesign a Phase Interleaving PFC Buck Boost Converter to Improve the Power Factor
International Journal of Innovation and Scientific Research ISSN 2351-8014 Vol. 11 No. 2 Nov. 2014, pp. 445-449 2014 Innovative Space of Scientific Research Journals http://www.ijisr.issr-journals.org/
More informationUNIVERSITY OF NAIROBI FACULTY OF ENGINEERING DEPARTMENT OF ELECTRICAL AND INFORMATION ENGINEERING SIMULATION AND ANALYSIS OF A VARIABLE SPEED DRIVE
UNIVERSITY OF NAIROBI FACULTY OF ENGINEERING DEPARTMENT OF ELECTRICAL AND INFORMATION ENGINEERING SIMULATION AND ANALYSIS OF A VARIABLE SPEED DRIVE MATLAB/SIMULINK METHOD PROJECT INDEX: 109 BY NANDWA FRIDAH
More informationRequest for Payment Instructions Wholesale Distribution Access Tariff (WDAT) Attachment I - GIP
Grid Interconnection & Contract Development Request for Payment Instructions Wholesale Distribution Access Tariff (WDAT) Attachment I - GIP Submittal Instructions Prior to submitting your application and
More informationThe State of the Electrical Grid in Washington State. Michael Pesin, PMP, P.E. Seattle City Light
The State of the Electrical Grid in Washington State Michael Pesin, PMP, P.E. Seattle City Light April 24, 2014 *Seattle City Light *National and Washington State Electrical Grid Today *Smart Grid *Pacific
More informationTopic 1 Introduction Main Topics (Introduction)
Advanced AC Drive Systems Bin Wu PhD, PEng Professor ELCE Department Ryerson University Contact Info Office: ENG328 Tel: (416) 979-5000 ext: 6484 Email: bwu@ee.ryerson.ca Counseling Hours Ryerson Campus,
More informationHarmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies
Soonwook Hong, Ph. D. Michael Zuercher Martinson Harmonics and Noise in Photovoltaic (PV) Inverter and the Mitigation Strategies 1. Introduction PV inverters use semiconductor devices to transform the
More informationChapter 3 AUTOMATIC VOLTAGE CONTROL
Chapter 3 AUTOMATIC VOLTAGE CONTROL . INTRODUCTION TO EXCITATION SYSTEM The basic function of an excitation system is to provide necessary direct current to the field winding of the synchronous generator.
More informationAN ISOLATED GATE DRIVE FOR POWER MOSFETs AND IGBTs
APPLICATION NOTE AN ISOLATED GATE DRIVE FOR POWER MOSFETs AND IGBTs by J.M. Bourgeois ABSTRACT Power MOSFET and IGBT gate drives often face isolation and high voltage constraints. The gate drive described
More informationGrid Interconnection of Renewable Energy Sources Using Modified One-Cycle Control Technique
Grid Interconnection of Renewable Energy Sources Using Modified One-Cycle Control Technique NKV.Sai Sunil 1, K.Vinod Kumar 2 PG Student, GITAM University, Visakhapatnam, India. Asst.Professor, Department
More informationDevelopment of Novel Power Electronic Topologies for the Integration of Battery Energy Storage in FACTS Devices
Development of Novel Power Electronic Topologies for the Integration of Battery Energy Storage in FACTS Devices M. L. Crow, Ying Cheng, Chang Qian Electrical and Computer Engineering University of Missouri-Rolla,
More informationDesign of an Auxiliary Power Distribution Network for an Electric Vehicle
Design of an Auxiliary Power Distribution Network for an Electric Vehicle William Chen, Simon Round and Richard Duke Department of Electrical & Computer Engineering University of Canterbury, Christchurch,
More informationUNINTERRUPTIBLE POWER SUPPLIES >9900AUPS UNINTERRUPTIBLE POWER SUPPLIES
UNINTERRUPTIBLE POWER SUPPLIES 9900A >9900AUPS UNINTERRUPTIBLE POWER SUPPLIES 9900A The 9900A UPS system uses the most advanced IGBT in both the converter and inverter with Digital Signal Processor (DSP)
More informationChapter 4 AC to AC Converters ( AC Controllers and Frequency Converters )
Chapter 4 AC to AC Converters ( AC Controllers and Frequency Converters ) Classification of AC to AC converters Same frequency variable magnitude AC power AC controllers AC power Frequency converters (Cycloconverters)
More information7-41 POWER FACTOR CORRECTION
POWER FTOR CORRECTION INTRODUCTION Modern electronic equipment can create noise that will cause problems with other equipment on the same supply system. To reduce system disturbances it is therefore essential
More informationReactive Power and Importance to Bulk Power System OAK RIDGE NATIONAL LABORATORY ENGINEERING SCIENCE & TECHNOLOGY DIVISION
Reactive Power and Importance to Bulk Power System OAK RIDGE NATIONAL LABORATORY ENGINEERING SCIENCE & TECHNOLOGY DIVISION Outline What is Reactive Power and where does it come from? Why is it important?
More informationThyristor-controlled power supplies and battery chargers
Thyristor-controlled power supplies and battery chargers Input voltage: 115 / 230 VAC, single phase, 50 / 60 Hz or 208 / 400 / 480 VAC, three phases, 50 / 60 Hz Output voltage: 12 / 24 / 48 / 60 / 72 /
More informationEnergy Systems Integration
Energy Systems Integration Dr. Martha Symko-Davies Director of Partnerships, ESI March 2015 NREL is a national laboratory of the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy,
More informationExcitation. www.andritz.com/neptun
Excitation www.andritz.com/neptun 02 NEPTUN Excitation Excitation 3 x 150 MW, Kopswerke II, Austria Dynamics with brain power The excitation system of a synchronous generator makes it possible to supply
More informationABB PSPS Erich Steinmann; Generator control-2013
ABB PSPS Erich Steinmann; Generator control-2013 GENERATOR CONTROL THE MODULAR SOLUTION FOR GENERATORS To make sure that power is efficiently converted into electric energy, it is necessary to supervise
More informationO Desafio da Microgeração e das Microredes
31 Março 2008 Sessões Técnicas OE Campus da FEUP Rua Dr. Roberto Frias, 378 4200-465 Porto Portugal T +351 222 094 000 F +351 222 094 050 jpl@fe.up.pt O Desafio da Microgeração e das Microredes J. A. Peças
More informationAdvance Electronic Load Controller for Micro Hydro Power Plant
Journal of Energy and Power Engineering 8 (2014) 1802-1810 D DAVID PUBLISHING Advance Electronic Load Controller for Micro Hydro Power Plant Dipesh Shrestha, Ankit Babu Rajbanshi, Kushal Shrestha and Indraman
More informationPhilosophy of Topology and Components Selection for Cost and Performance in Automotive Converters.
Philosophy of Topology and Components Selection for Cost and Performance in Automotive Converters. Alexander Isurin ( sashai@vanner.com ) Alexander Cook (alecc@vanner.com ) Vanner inc. USA Abstract- This
More informationInverter technology. bulletin
Inverter technology application bulletin What is the inverter component? The inverter is an electronic power component that continuously varies the electricity supply frequency of an electric motor. The
More informationHybrid Wind-Fuel Cell Renewable Energy Utilization Scheme for Village Electricity
Proceedings of the 4 th International Middle East Power Systems Conference (MEPCON 0), Cairo University, Egypt, December 9-, 00, Paper ID 3. Hybrid Wind-Fuel Cell Renewable Energy Utilization Scheme for
More informationWhat Matters for Successful Integration of Distributed Generation
What Matters for Successful Integration of Distributed Generation Thomas Ackermann Energynautics GmbH, Germany t.ackermann@energynautics.com Expert User of DIgSILENT PowerFactory for Power Systems Studies
More informationGeneral Validation Test Program for Wind Power Plants Connected to the Hydro-Québec Transmission System
General Validation Test Program for Wind Power Plants Connected to the Hydro-Québec Transmission System Direction Planification des actifs et expertise de transport February 2011 TABLE OF CONTENTS 1. CONDUCTING
More informationDevelopment of High Frequency Link Direct DC to AC Converters for Solid Oxide Fuel Cells (SOFC)
Development of High Frequency Link Direct DC to AC Converters for Solid Oxide Fuel Cells (SOFC) Dr. Prasad Enjeti Power Electronics Laboratory Department of Electrical Engineering College Station, TX -
More informationCoordination Control of a Hybrid AC/DC Microgrid With Various Renewable Energy Sources
Coordination Control of a Hybrid AC/DC Microgrid With Various Renewable Energy Sources 1 Hema Surya Teja Beram, 2 Nandigam Rama Narayana 1,2 Dept. of EEE, Sir C R Reddy College of Engineering, Eluru, AP,
More informationDC TRANSMISSION BASED ON VOLTAGE SOURCE CONVERTERS
DC TRANSMISSION BASED ON VOLTAGE SOURCE CONVERTERS by Gunnar Asplund, Kjell Eriksson, Hongbo Jiang, Johan Lindberg, Rolf Pålsson, Kjell Svensson ABB Power Systems AB Sweden SUMMARY Voltage Source Converters
More informationModelling, Simulation and Performance Analysis of A Variable Frequency Drive in Speed Control Of Induction Motor
International Journal of Engineering Inventions e-issn: 78-7461, p-issn: 319-6491 Volume 3, Issue 5 (December 013) PP: 36-41 Modelling, Simulation and Performance Analysis of A Variable Frequency Drive
More informationHybrid Power System with A Two-Input Power Converter
Hybrid Power System with A Two-Input Power Converter Y. L. Juan and H. Y. Yang Department of Electrical Engineering National Changhua University of Education Jin-De Campus, Address: No.1, Jin-De Road,
More informationMicrogrids and self-generation with renewable energies
Energías Renovables Microgrids and self-generation with renewable energies Technology for energy efficiency CIRCUTOR Renewables Modern energy needs have caused the firm introduction of renewable energies,
More informationWhite Paper: Pervasive Power: Integrated Energy Storage for POL Delivery
Pervasive Power: Integrated Energy Storage for POL Delivery Pervasive Power Overview This paper introduces several new concepts for micro-power electronic system design. These concepts are based on the
More informationSmart City Málaga. Susana Carillo Aparicio. Distribución eléctrica
Smart City Málaga Susana Carillo Aparicio endesa 17 12 1 5 Distribución eléctrica ENEL group: an international energy operator Presence 40 countries Net installed capacity 99 GW Customers ~61 million Employees
More informationSubmarine Cable Power Transmission using DC High-Voltage Three-Level Converters
Submarine Cable Power Transmission using DC High-Voltage Three-Level Converters João Antunes, IST (jlantunes@gmail.com) Astract This paper is about multilevel converters used in High Voltage Direct Current
More informationOutline. Turbine Generators. Generator History 3/25/2014
Turbine Generators Andrew Kusiak 2139 Seamans Center Iowa City, Iowa 52242-1527 andrew-kusiak@uiowa.edu Tel: 319-335-5934 Fax: 319-335-5669 http://www.icaen.uiowa.edu/~ankusiak Outline Generators Synchronous
More informationSUCCESS EPCOS Capacitors
SUCCESS EPCOS Inc. Capacitors Group April, 2012 EV / HV / E-Mobility Battery charger system & Inverter On Board and Off Board Assembly Trend: Wireless Charging DC/DC Converter Filtering DC Link E-Mobility
More informationESS industry day Introduction to Imtech Power Conversion
ESS industry day Introduction to March 12 th, 2014 Erwin Lenten Royal Imtech N.V. is a technical services provider in Europe in electrical services, ICT and mechanical services Turnover 5.4 billion, 29,000
More informationOffshore Platform Powered With New Electrical Motor Drive System
Offshore Platform Powered With New Electrical Motor Drive System Authors: Jan O. Lamell, M.Sc E.E. ABB Automation Technologies Presenters: Thomas Johansson, M.Sc E.E. ABB Automation Technologies Timothy
More informationIndustry-Driven Power Engineering Curriculum Development in an Electrical Engineering Technology Program
Industry-Driven Power Engineering Curriculum Development in an Electrical Engineering Technology Program Aleksandr Sergeyev Michigan Technological University avsergue@mtu.edu Nasser Alaraje Michigan Technological
More informationPMDD WIND TURBINE 1.5MW
1.5MW PMDD WIND TURBINE Generator Stator Rotor Blade Wind Measurement Equipment Casted Hub Auxiliary Crane Pitch System Base Frame Generator PM Rotor GOLDWIND 1.5MW PERMANENT MAGNET DIRECT-DRIVE (PMDD)
More informationONR/NSF-Sponsored Faculty/Industry Workshop
ONR/NSF-Sponsored Faculty/Industry Workshop Reforming Power-Related Curriculum Power Electronics Presenter: Hariharan Krishnaswami Assistant Professor University of Texas at San Antonio New Electric Power
More informationSpeed Control Methods of Various Types of Speed Control Motors. Kazuya SHIRAHATA
Speed Control Methods of Various Types of Speed Control Motors Kazuya SHIRAHATA Oriental Motor Co., Ltd. offers a wide variety of speed control motors. Our speed control motor packages include the motor,
More information