Simplified VO M&V Protocols Approved May 4 th , 2010 1. Simplified VO M&V Protocol can be applied to distribution systems with Residential and Small Commercial Loads to verify energy savings from reduced voltage operation. 2. Protocol makes use of historical data, system modeling, 7-day M&V ‘on’ and 7-day ‘off’ hourly measurements, and “Deemed” end-use VO Factors determined from NEEA DEI Study 2007 results. 3. Protocol can be used with three Voltage Regulation Techniques, VFR, LDC, and AVFC. 1
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Simplified VO M&V Protocols Approved May 4 th, 2010 1.Simplified VO M&V Protocol can be applied to distribution systems with Residential and Small Commercial.
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Simplified VO M&V ProtocolsApproved May 4th, 2010
1. Simplified VO M&V Protocol can be applied to distribution systems with Residential and Small Commercial Loads to verify energy savings from reduced voltage operation.
2. Protocol makes use of historical data, system modeling, 7-day M&V ‘on’ and 7-day ‘off’ hourly measurements, and “Deemed” end-use VO Factors determined from NEEA DEI Study 2007 results.
3. Protocol can be used with three Voltage Regulation Techniques, VFR, LDC, and AVFC.
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126Volts
120
114Feeder Length
Three Voltage Regulation Techniques1. Voltage Fixed Reduction (VFR)
• Fixes the voltage level at the substation source and the voltage level at the end of the feeder varies with load
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• Old voltage setting Vset = 125V, R and X settings = 0
• New voltage setting Vset = 122V, R and X settings = 0
Existing Vset = 125VNew Vset = 122V
126Volts
120
114Feeder Length
Three Voltage Regulation Techniques2. Line Drop Compensation (LDC)
– Fixes the voltage level at the end of the feeder and the voltage level varies at the substation source with load
3
• Old voltage setting Vset = 125V, R and X settings = 0
• New voltage setting Vset = 120V, R and X settings = 3 to 5
Existing Vset = 125V
New Vset = 120V, R and X setting = 3 to 5
Three Voltage Regulation Techniques3. Automatic Voltage Feedback Control (AVFC)
– Fixes the voltage level at the substation source based on real-time voltage feedback sign from the end of the feeder
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(s)
126Volts
120
114Feeder Length
Three Voltage Regulation Techniques3. Automatic Voltage Feedback Control (AVFC)
– Fixes the voltage level at the substation source based on real-time voltage feedback sign from the end of the feeder
5
• Old voltage setting Vset = 125V, R and X settings = 0
• New voltage setting Vset = 119V, R and X settings = 0
Existing Vset = 125V
Vset = Adjusts for load conditions based on end of line feedback
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Voltage Control Zones
Load Tap Changer (LTC)
Transformer
Feeder Breaker
Feeder
VCZ for LTC
Secondary Voltage
Zone
Primary Voltage Zone
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Voltage Control Zones
Load Tap Changer (LTC)
Transformer
Feeder Breaker
Feeder
VCZ for V-RegVCZ for LTC
V-Reg
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Four Stages to Simplified VO M&V Protocol
Existing Performance Assessment and
VO Implementation Plan
System Improvements Baseline Pre-VO
measurements
VO Implementation Post-VO Measurements
and Verification
Persistence Measurements
Historical Load Data: kWh-annual, Volt_Drop-max, kWpeak-demandDistr _Line ModelingLoad_Flow AnalysisThreshold AnalysisDetermine end-use VO FactorEstimate Potential SavingsInstall VO and SI Improvements
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7-day measurements ‘OFF’Veol, Vset, Esub Calculate Vpre-annual average