Power & Energy Monitoring in the Era of Green Energy
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1 Power & Energy Monitoring in the Era of Green Energy Weschler Instruments IRIS2009.ppt 1
2 Agenda Energy Trends Consumer Load Monitoring Commercial & Industrial Applications Industrial Products Test Equipment 2
3 Distributed Generation Solar Wind Geothermal Hydroelectric Energy Trends 3
4 Off-Grid Operation Mobile Applications Temporary Applications Isolated Sites Innovators Energy Trends 4
5 Smart Meters Automated Reading (AMR) Outage Notification Real Time Load Monitoring Variable Rate Billing Remote Load Shedding Energy Trends 5
6 Time of Day Rates Reduce Demand Peaks Defer Power Plant Construction Better Utilize Existing Transmission Lines Encourage Conservation Energy Trends 6
7 Real Time Load Management By Utility or Customer Prevent Overloads, Brownouts & Blackouts Avoid Power Plant Construction Defer New Transmission Lines Energy Trends 7
8 Cogeneration Combined Heat & Power Supply Local Electrical Need Sell Excess Power to Utility Standby Power Energy Trends 8
9 Higher Energy Costs Fuel Prices Emission Controls Delivery Fees Carbon Tax Escalating Rate Brackets Energy Trends 9
10 Mandatory Conservation Energy Independence & Security Act (2007) Executive Order (2007) Energy Policy Act of 2005 DOD Instruction (2005) LEED Certification (Green Building Initiative) Utility Demand Response programs Energy Trends 10
11 Energy Trends Distributed Generation Off-Grid Operation Smart Meters Variable (Time of Day) Rates Remote Load Management Higher Energy Costs Mandatory Conservation Goal Conserve energy & reduce fossil fuel use Where & How Much Need to Measure 11
12 Key Terms Active Power Apparent Power Reactive Power Power Factor Active Energy Demand (kw) Fundamental Harmonic Order W = VA (DC source) W = VA PF (AC source) S = VA Q = VAr PF = W/VA λ kwh Average power for time interval Mains frequency Multiple of mains frequency 12
13 Waveforms Motor Load Switching Power Supply 13
14 Power Measurement ICs RMS Voltage, RMS Current Line Frequency Neutral Line Current Power Factor(s) Voltage Phase Angles Active/Reactive/Apparent Power Active/Reactive/Apparent Energy Fundamental/Harmonic Power Bi-Directional 14
15 Load Monitoring Consumer Products Single Device Entire House Web Enabled 15
16 Commercial Applications Generation Load Monitoring Demand Management 16
17 Solar DC System Generation 17
18 Solar AC System Generation 18
19 Grid Connected System Generation 19
20 Sub-Metering AC Mains Distribution Panel to Individual Units Sub-Meters Load Monitoring 20
21 Commercial Sub-Metering 21
22 Data Collection 22
23 Other Sub-Metering Applications Building Management HVAC Lighting Computer/Server Arrays Factory Work Cells Processing Plant Stages Load Monitoring 23
24 Vehicle Charging AC Mains Sub-Meter Load Monitoring 24
25 Demand Management Monitoring Manual Load Shedding Automatic Load Shedding Branch Circuit Limit Alarm Demand Controller 25
26 System Configurations 26
27 Industrial Products Panel Instruments Systems Wireless Products Smart Meters Services 27
28 Panel Instruments 28
29 Energy Meter Parameters kwh delivered & received kvar delivered & received kw real time kw per phase kvar real time kvar per phase kva real time kva per phase % Power Factor Power Factor per phase Total Amps Average Amps Amps per phase Average volts, line to neutral Average volts, line to line Volts to neutral per phase Volts line to line Average phase angle Phase angle per phase Frequency 29
30 Current Transformers Solid core for cost, reliability Split core for easy retrofit Specified by ratio, accuracy class & burden Burden sets maximum secondary load R Metering CTs may require heavy leads 30
31 Systems 31
32 Current Transducer A:mV transducer Locate far from meter with no accuracy loss 32
33 "Green" Meter kwh in dollars Estimated cost per hour, based on current load CO 2 emissions in pounds, based on DOE data Estimated hourly CO 2 emissions based on current load Net metering, including utility delivered vs. usergenerated power 33
34 Software 34
35 Wireless Products 35
36 Smart Socket Meters Accurate energy measurement Advanced power quality recording Wire or wireless communication 36
37 Services Energy Audit Remote Energy Monitoring DSL CONNECTION EMS PC EMS PC GSM /CDMA MODEM GSM/CDMA TOWER ISP (Internet Service Provider) REMOTE MONTORING CENTER Online Data Analysis 37
38 Case Study Chemical Plant $k/mo Production Energy Profits Before After % energy savings resulted in >50% profit increase 38
39 Test Equipment Power Monitors Power Quality Analyzers Power Dataloggers 39
40 Power Quality Analyzer PQ Parameters Dips & Swells Harmonics Interruptions Flicker Inrush Graphical Display Analysis Scope, Phasor Diagrams Setup Prompts 40
41 Calculations 41
42 Connections 42
43 Summary Key Factors in Equipment Selection: Permanent or Temporary Installation Turn-key or Build your Own Parameters to be Measured Mains Configuration Distance to Sensors Type of Display Needed Computer Interface/Software Control or Alarm Outputs Size, Cost. 43
44 68 Years of Power & Process Measurements 44
45 45
46 Final Thoughts Energy costs are controllable Easier to reduce than other cost factors ARRA 2009 provides $20B for energy efficiency programs State & Federal tax incentives also available Measure & Verify required to substantiate any improvement Thanks to E-MON, Conzerv, AEMC, Fluke & Yokogawa for providing material for this presentation. 46
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