CVR Protocol No. 1Approved April 14th, 2004

1. CVR Protocol No 1 can be applied to distribution systems with Residential, Commercial, and Industrial customers.

2. CVR Protocol No 1 is a site specific custom protocol and can be applied to distribution systems with automatic end-of-line (EOL) voltage feedback control AVFC. The objective is to hold the Veol constant.

3. CVR Protocol No 1 requires Esub and Veol measurements of approximately six months of CVR ‘on’ and ‘off’ day period and 6 months of CVR ‘on’ period.

4. Verification of energy savings is determined using statistical analysis by calculating CVR factors (weekdays and weekends) for each weather season correlated for temperature. 1

CVR Protocol No. Approved April 14th, 2004

5. For each selected measurement period of on&off days, the CVR factors are statistically determined for each season (for weekdays and weekends) using the ratio of measured substation energy % change to measured average eol voltage % change. CVRf% = Esub% / Veol%

6. The CVR factors and Veol voltage are statistically assigned to each hour of the annual measured load shape. The total energy savings is annual sum of the hourly CVRf% * Veol% * Esub.

7. The Automated CVR ‘off’ setting is be 2 Volts above the CVR ‘on’ setting for two to four week periods.

8. Statistical analysis is performed using the UtiliData CVR Estimation Method.

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Automated Voltage Regulation TechniquesAutomatic 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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126Volts

120

114Feeder Length

Automated Voltage Regulation TechniquesAutomatic 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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• Old voltage setting Vset = 125V, R and X settings = 0

• New voltage setting Vset = 119V, Veol feedback

Existing Vset = 125V

Vset = Adjusts for load conditions based on end of line feedback

126Volts

120

114Feeder Length

CVR Protocol No 1 MeasurementsAutomatic Voltage Feedback Control (AVFC)

Measure Energy at Substation - Esub Measure Voltage at End of Line – Veol Measure Temperature at Substation - Tsub

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Existing Vset = 125V

Vset = Adjusts for load conditions based on end of line feedback

EsubVeol

Tsub

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Typical Distribution System Voltage Control Zone

Load Tap Changer (LTC)

Transformer

Feeder Breaker

Feeder

VCZ for LTC

Secondary Voltage

Zone

Primary Voltage Zone

Cap

VeolEsub

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Multiple Voltage Control Zones

Load Tap Changer (LTC)

Transformer

Feeder Breaker

Feeder

VCZ for V-RegVCZ for LTC

V-RegCap

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Typical Automated CVR with Volt/Var Control

Load Tap Changer (LTC)

Transformer

Feeder Breaker

Feeder

VCZ for V-RegVCZ for LTC

V-RegCap

AMI

AMI

CVR Protocol No 1Questions

1. Does the CVR Protocol No 1 meet minimum RTF guidelines for Custom Site-Specific savings estimate and cost-effectiveness calculation methodology?

2. Is the CVR Protocol No 1 applicable to a wide variety of distribution systems configurations and operation practices?

3. Does the CVR Protocol No 1 adequately ensure comprehensive distribution system cost-effective efficiency?

4. Does the CVR Protocol No 1 adequately ensure that distribution system safety and facility standards are meet?

5. What changes are necessary to simplify the automated CVR protocol requirements and calculation methods?

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CVR Protocol No 1Issues

1. Verification of statistical methods to adequately evaluate savings

2. Simplified statistical measure savings calculation methods

3. Distribution load flow analysis requirements

4. Facility data requirements of lines, equipment, and loads

5. Characteristic load models (ZIP) requirements

6. Historical load data and temperature data requirements

7. Distribution system efficiency impacts

8. Location and number of voltage EOL measurements

9. Location and number of temperature sensors

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CVR Protocol No 1Issues

10. Voltage measurement locations (e.g., Veol, Vsub, Vreg, Vcap)

11. System average voltage or end-of-line average voltage

12. System performance requirements (i.e., Vmax, Vmin PFmin, VDsec-max, Vsource-max, VDpri-max, Control Bandwidth)

13. Application to wide variety of automated CVR volt/var systems

14. Simplified statistical measure savings calculation methods

15. Distribution system loss impacts

16. RTF custom or standard site-specific protocol requirements

17. Sunset criteria (re-verification)

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CVR Protocol No 1Homework

1. Review existing CVR No.1 protocol for application to a wide variety of distribution system configurations and operations

2. Review RTF guidelines for development of RTF savings estimation methods

3. Evaluate correctness of CVRf formulation based on only one Veol measurement point given line capacitors and multiple feeders per substation each having different load profiles.

4. Compare accuracy of protocol using average system voltage vs average end of line voltage with multiple feeders, regulators, capacitors (fix/sw), and non-uniform distributed loads.

5. Suggest simplified automated CVR statistical methods, measurements, and data needed to evaluate measure savings 12

CVR Protocol No 1Homework

6. Evaluate the protocol effectiveness to ensure comprehensive distribution efficiency and facility safety

7. Test CVR Protocol No 1 statistical methods using NEEA DEI 2007 Study Pilot Substation data (10 substations and 31 feeders)

8. Test simplified automated CVR statistical methods using NEEA DEI 2007 Study Pilot Substation data (10 substations and 31 feeders)

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