Technical Spotlight Demo5-2

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1 Technical Spotlight Demo5-2 Spotlight on Automated failure management in LV network implemented in DEMO5 This project has received funding from the European Union s Seventh Framework Programme for research, technological development and demonstration under grant agreement n

2 Table of content TABLE OF CONTENT INTRODUCTION AND SCOPE OF THE DOCUMENT OBJECTIVE AND TECHNICAL REQUIREMENTS Context & Objective Requirements DEVELOPMENT AND IMPLEMENTATION Architecture and technical characteristics Lab tests Field implementation TECHNICAL RESULTS ELEMENTS OF COST & BENEFITS ANALYSIS REPLICATION, NEXT STEPS AND UP SCALING INTELLECTUAL PROPERTY (IP) REGULATORY CHALLENGES CONCLUSION AND KEY MESSAGES avril /16

3 1 Introduction and scope of the document Type of solution Equipment / Hardware / Firmware Information system Process Manufacturer(s) implied (for equipment or hardware) Work Stream considered Active Demand DER integration Location / Topology (with regards to distribution grid) Storage Islanding MV Innovation LV Innovation HV/MV Substation MV MV/LV SS LV DER Meter Downstream meter Other Centralized system (calculations, information system) Other Decentralized Other : Thematic(s) system Grid Monitoring / state estimation Active demand / DSM DER Integration / increased grid capacity Islanding Anti Islanding protection Automatic Failure Detection Remote Grid Operations Automatic Failure Management / Grid recovery Automatic Grid topology reconfiguration Other : Use Case(s) DEMO 1 Failure Management in MV networks DEMO 2 Outage detection in the LV Network DEMO 3 DEMO 4 DEMO 5 Automatic Grid Recovery (AGR) Voltage control on MV grids (with high DER penetration) MV grid automation of failure management DEMO 6 Islanding Reduction of power demand Automatic Outage Detection (AOD) Key figures Number of remotely controlled LV street cabinets: 6 LV cable length: 4 km Number of customers: 64 Anti-islanding protection on MV grids Decentralized grid operation in MV Networks Secondary Substation Node (SSN) Customer Engagement MV Measurement acquisition LV grid automation of failure management Manage maximised PV production on LV network regarding constraints and flexibility programs Demand response for MV Customers Management of islanding operations Encourage resident to adopt smarter habits according to network state 19 avril /16

4 2 Objective and technical requirements 2.1 Context & Objective The objective of this part of Demo5 project was to test i) operation of selected section of LV network in interconnected topology between 2 DTS (usually LV network is operated in radial topology), ii) enable automated localization of fault to the smallest possible section by the change in conception of protection and iii) automation of LV network reconfiguration. The mentioned steps leads to minimisation of the influence of the failure to the least possible number of customers (ideally eliminate the power outage completely) and reduce significantly the time needed for fault localization and isolation. 2.2 Requirements Demo5 functionality of automated failure management in LV network needs installation of remote controlled circuit breaker, load break switches, RTUs, WiMAX in LV street cabinets. In case of Demo5, Local SCADA was used in order to secure automated solution. 3 Development and implementation 3.1 Architecture and technical characteristics Description of automated failure management in LV network: The goal of LV automation is to reduce impacts to customers by automated failure management in the case of failure in LV distribution network. This function is secured by determination of failure location and isolation thanks to remote controlled circuit breakers and load break switches which are installed in 6 LV street cabinets The full description of LV automation is included in deliverable dd5.2. (please see chapter 4.2.3) 19 avril /16

5 3.2 Lab tests The laboratory intended for Demo5 represented the infrastructure for tests conducted by main project contractors (e.g. ABB, Cisco, and Siemens). The structure of tests, technologies tested and relevant tests methodologies were provided by involved partners of the project. Lab tests covered activities needed for implementation of automated failure management on LV, MV and island operation functionalities. Initial testing period was focused on setting basic communication architecture for operation and management of Demo5 as a basis for implementation of all functionalities. This architecture is expected to provide appropriate solution for MAN network implementation allowing sufficient stability, convergence, or prioritization of data operation in the relevant area. Following tests included compatibility and interoperability of equipment and communication means in terms of their performance and enabling transfer of relevant information in sufficient manner allowing fulfilment of all task intended for Demo5. The special attention was paid to management of the island operation in terms of ensuring appropriate reaction of the grid component involved in the balance maintenance during island operation. Communication of the LV part of the grid via WiMAX technology was also of huge importance for testing as it is a technology not used in our company. Abovementioned devices were tested in order to prove their ability to communicate through given communication architecture via both wireless and other type of connection (fibre optic or metal connection) using several communication protocols.(e.g. IEC providing sensitive, time critical communication to control the grid protection nodes, power sources, circuit breakers, etc., IEC 6870 for non - critical kind of communication). Laboratory tests were separated into following groups: ICT tests DTS tests DTS and control system tests RIS and control system tests Local SCADA (LCS) tests Superior SCADA tests All conducted laboratory tests met Demo5 expectation and provided satisfactory results i.e. confirmed that tested communication means will ensure the intended functions. It means that our goals regarding automation of LV and MV part of the grid are feasible allowing identification, isolation and subsequent fault resolution. 19 avril /16

6 Superior SCADA DCS Control Unit of CHP unit Automatics of island operation AIO Regional SCADA LCS IEC DTS 1 DTS 2 DTS n IEC IEC IEC IED IED IED 13 Circuit breaker X4T 250/800A CCE IEC R RTUT U 12 MODBUS 3 IED IED IED 2 Circuit breaker X4T 250/800A 7 1 CCE IEC R RTUT U MODBUS Street cabinet LV RTU 10 Circuit breaker X4T 250/800A MODBUS IED IED IED 9 Circuit breaker X4T 250/800A CCE IEC R RTUT U 8 MODBUS Figure 1 Laboratory test scenarios - DSO part 19 avril /16

7 Figure 2 ICT tests in lab 3.3 Field implementation The topology of LV grid where automated failure management is implemented is depicted on figure 3. Communication with LV street cabinets is secured by WiMAX. 19 avril /16

8 Figure 3 Single-line diagram of LV network with automated failure management ABB ensured the implementation of LV automation by following activities: Replacement or modification of existing LV switchboards in order to be capable of inclusion of remote readable measuring beyond the main switch Installation of current sensors on individual LV outlets with the possibility of remote reading of measured values Installation of intelligent mini circuit breaker () on individual LV outlets with the possibility of remote controlling as well as for remote setting of protection parameters Installation and commissioning of 6 intelligent LV street cabinets 19 avril /16

9 Figure 4 LV street cabinet for LV automation inside view LV street cabinets (RIS) ABB company developed and delivered complete plastic LV street cabinets in pillars including equipment. LV street cabinet consists of two 2 parts: Bottom part (see Figure 5) contains power technology (connection of LV feeders): circuit breakers, load break switches or fuse switch disconnectors, display (shows set values of circuit breakers) and alternatively surge protection (installed in three LV street cabinets). In upper part (see Figure 4) extra-low voltage (communication and control) technology is placed: RTU, WiMAX receiver with antenna and power supply. In order to evaluate climatic conditions inside LV street cabinet during real operation, two of them are equipped with temperature and humidity sensors connected to the RTU, whereas one of them is special coated against rise of ground humidity. Frame of LV street cabinet was produced from standard material by DCK Holoubkov company. For the purpose of securing backup power supply it was necessary, to fulfil condition for ensuring disconnection of all elements and sending information about this status to the Local SCADA (LCS) and Superior SCADA (DCS). Backup power source UPS was designed with the duration 380 second with the load of 1 A (>6min.); RTU540 has nominal current 300 ma and maximal current 2 A (approximately 3 min.). Power supply for smart equipment under normal conditions is secured from every single LV cable on input; this means from the lower part of both LV circuit breakers. For this function parallel power supply modules to the ABB source are used. Based on placement of defined elements, the dimensions for LV street cabinets is: width 780 mm, depth of boxes 320 mm is corresponding to the depth of circuit breakers with motor drive. Main elements of the upper part of LV street cabinet (extra-low voltage communication and control part): 19 avril /16

10 1. Humidity and temperature sensor including calculation of dew point by manufacturer Papouch ltd., type THT2 + sensor (only in LV street cabinets number 4 and 6). 2. Power supply PHENIX CONTACT, type QUINT-PS/1AC/24DC/5 (number of sources is based on option of power supply from FA1, FA2 etc., protection of power supplies is done by fuses in power technology part of LV street cabinet). 3. Uninterruptible (backup) power supply 24 V DC/10 A, with integrated 1.3 Ah battery module. UPS PHENIX, type QUINT-DC-UPS/24DC/ Fuse switch disconnector, ABB, type E91/32 (24V DC) for power supply of equipment in the extra-low voltage part of LV street cabinet and for protection of manipulations and signalization of circuit breakers in power technology (lower) part of LV street cabinet. 5. Central unit ABB, type RTU540, 560CIG10 (protection F001). 6. Communication terminal ALVARION, type BMAX-CPE-ODE-PRO/Dme-SE-3, 5 (WiMAX) including power source OPS-DC and antenna AN1323 (protection F003). Figure 5 Description of upper part of LV street cabinet Main elements in lower part of LV street cabinets (power technology) 1. Fuse switch disconnector ABB, type E91/32, 6A (230V AC) for power supply of QUINT-PS in control part of LV street cabinet. In this case power supply is realized by FA1 phase L1, FA2 phase L1 and FA3 phase L1 (number of fuse switch disconnectors and hence the number of power supply connection in control part of LV street cabinet is determined by mounting of above mentioned circuit breakers). 2. Display unit TDS-57 for display of current settings of mounted circuit breakers (protection F008 next to the display, common for temperature and humidity sensor THT2). 3. Load break switch on input FA01-ABB, type T5D400, In=400A 3pFF. 4. Circuit breaker on output to the LV distribution network, circuit breaker FA1-ABB, type T5N400- PR223DS-L In=400A in the LV street cabinet number 6 - ABB, type T5N400-PR222DS/PD-LSI In=400A 3pFF. 5. Output to the distribution part of network (to the customers), circuit breaker FA2 (FA3)-ABB, type XT4N250-EKIP LSI In=250A 3pFF. 6. Fuse switch disconnector XLP00-6BC service lines to the customer up to 160A (in LV street cabinet number 5 is fuse switch disconnector with label FU01-ABB, type XLP2-6BC up to 400A), fuse switch disconnector with label FU02-ABB, type XLP2-6BC up to 400A is on output to the LV distribution network. 7. Surge protection DEHN, type DEHNvenCI/DVCI FM. 8. Sensor for open door indication. 19 avril /16

11 Figure 6 Description of lower power part of LV street cabinet no 1 4 Technical results The purpose of the automation on LV level is an automated failure management on LV network within a predefined part of LV distribution network in Vrchlabí (figure 5). The description of LV automation function is introduced in detail in dd5.2. The description of implementation of LV automation function is provided in detail in dd5.3. Due to the fact the network was newly reconstructured, the probability of failure was very low and the risk of not being able to test the implemented solution at all was therefore high, ČEZ Distribuce decide to simulate failures both in field and by simulation of virtual failures in Local SCADA system. The tests were carried out in order to test if the proposed and implemented solution functions as expected and also in order to evaluate the project KPIs. Further details about the outcomes of evaluation of KPIs are in chapter 2.2. Automated failure management on LV functional tests Functional tests of LV automation were carried out on 9 th of September The function of automated failure management on LV was tested for all scenarios (all possible fault locations) by simulation in Local SCADA. In all cases the functional tests by simulation in Local SCADA were successful. For one fault location scenario the function of automated failure management on LV was confirmed also by field test thanks to physical intervention of crew who manually tripped circuit breakers in LV 19 avril /16

12 street cabinets number 1 and 2. By this manipulation, failure between LV street cabinets 1 and 2 was simulated. This caused an overcurrent flow in LV network and activation of failure alarm H111T (overcurrent activation - tripped) in Local SCADA. Dispatchers were informed by the Local SCADA which, based on this alarm, started fault localization and issued a proposal for an isolation sequence according to identified place of the failure. Proposal was accepted by dispatcher and fault was isolated thanks to manipulation sequences issued by Local SCADA towards the relevant circuit breakers and load break switches (figure 6). Testing was carried out on Local SCADA access terminal at Siemens headquarters with the supervision of ČEZ Distribuce dispatchers. Fault localization and isolation times for LV automation were determined and are shown in table 1. LV automation Alarm signalization delay IAP delay in calculation (Local SCADA) IAP + ANOP (Local SCADA) Time needed for confirmation of manipulation sequence by dispatcher Information about circuit breakers status change (confirmation that manipulation sequence was finished) Time [s] Comments 1 estimation 10 10s in worst case Average time - measured times during testing were between 42s - 75s Average reaction time of the dispatcher Depends on number of manipulation steps Total 855 Table 1 Localization and isolation times data collected from LV automation testing (needed for KPI evaluation) Further functions of LV automation were confirmed by other simulation tests which were carried out during the demonstration period: 1. Change of protections settings in case the LV topology change 09/ Reaction on situation when crew changes the topology in case of RTU downtime 05/ Deactivation of LV automation functionality in case of islanding 06/2015 All above mentioned tests were carried out by simulation in Local SCADA and were successful. Local SCADA screen for LV automation is shown on figure avril /16

13 Figure 7 Local SCADA snapshot - LV network topology visualization 19 avril /16

14 All information about test scenarios are detailed in Annex 2 - Testbook for MV and LV automation (Siemens). Implementation of automation on LV level enabled to operate the LV network between DTS 1436 and DTS 1439 in a parallel/loop by closing the circuit breaker in LV street cabinet number 3. This has a slightly positive effect on losses and a very positive effect on voltage deviations (for more, please see KPI evaluation in chapter 2.2). All above mentioned tests (field tests and simulations) confirmed, that Demo5 solution for automated failure management on LV operates as expected (and described in dd5.2). During the demonstration period, faults which could be solved by LV automation didn t occur (this was expected, as the number of power failures on LV network is usually low thus longer monitoring period for evaluation of management of real failures is needed and ČEZ Distribuce will continue monitoring of LV automation functionality also after the end of GRID4EU project. The implementation of automation solutions in Demo5 (for MV) results in time reduction in fault localization and isolation this was defined as a one of Demo5 KPIs. This KPI had the aim of verifying that smart grid solutions do decrease the reaction periods, and also indicated the value of this reduction (if a reduction in relevant period is achieved). KPI was evaluated separately for LV and MV level. KPI definition: Where: Percentage reduction in time required for fault localization and isolation Average time required for fault localization and isolation (with Smart Grid solutions) Average time required for fault localization and isolation (in Baseline situation) And specifically (for SG example): Time of the beginning of grid fault i (with Smart Grid solutions) Time of the finishing of manipulation needed for isolation of grid fault i (with Smart Grid solutions) 19 avril /16

15 Number of grid faults (with Smart Grid solutions) For Automated failure management in LV network: 855 s 8116 s Baseline fault localization and isolation times for LV level were evaluated thanks to company historical data for a period 03/ /2014 (data are recorded in SAP system). Fault localization and isolation time with SG solution for LV was evaluated thanks to the field and SCADA simulation tests which took place in KPI Fault localization and isolation time: - in LV grid (threshold according to KPI definition was set to 40%) Percentage reduction in time required for fault localization and isolation of failure was better than thresholds and thus KPI for LV was fulfilled. Relative reduction of fault localization and isolation times for LV is shown on figure 8. Figure 8 KPI Reduction of fault localization and isolation time in % (in LV network) 19 avril /16

16 5 Elements of Cost & Benefits Analysis Economic potential of solution for Automated failure management in LV networks strongly depends on implementation costs and also on regulation (penalization defined by NRO for exceeding SAIFI and SAIDI values by DSOs). 6 Replication, next steps and up scaling ČEZ Distribuce will investigate possibilities how to reduce implementation costs for Automated failure management in LV networks. For this task, further R&D activities are needed. 7 Intellectual property (IP) No intellectual property agreements for Automated failure management in MV distribution network in case of Demo5 were needed. 8 Regulatory challenges No regulatory challenges for automated failure management in LV distribution network in case of Demo5. 9 Conclusion and key messages Simulation tests confirmed, that Demo5 solution for LV level automation is operational and has a potential to significantly reduce fault localization and isolation times and thus also contributes to SAIFI and SAIDI reduction. However during the demonstration period, faults which could be solved by LV automation didn t appear (this was expected as the number of power failures on LV network within reconstructed grid is usually low). Thus longer monitoring period for evaluation of real failures is needed and ČEZ Distribuce will continue with monitoring and tuning of LV level automation function also after the end of GRID4EU project. 19 avril /16

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