CVR Protocol No. 1
Approved 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.
2
Automated Voltage Regulation Techniques
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
3
Automated Voltage Regulation Techniques
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
Volts
126
• Old voltage setting Vset = 125V, R and X settings = 0
• New voltage setting Vset = 119V, Veol feedback
120
114
Feeder Length
4
CVR Protocol No 1 Measurements
Automatic Voltage Feedback Control (AVFC)
 Measure Energy at Substation - Esub
 Measure Voltage at End of Line – Veol
 Measure Temperature at Substation - Tsub
Volts
126
120
114
Feeder Length
Esub
Tsub
Veol
5
Typical Distribution System Voltage Control Zone
Primary Voltage
Zone
VCZ for
LTC
Transformer
Esub
Feeder
Veol
Cap
Secondary
Voltage
Zone
Load Tap
Changer
(LTC)
Feeder Breaker
6
Multiple Voltage Control Zones
VCZ for LTC
Transformer
VCZ for V-Reg
Feeder
Cap
V-Reg
Load Tap
Changer
(LTC)
Feeder Breaker
7
Typical Automated CVR with Volt/Var Control
VCZ for LTC
Transformer
VCZ for V-Reg
Feeder
Cap
V-Reg
AMI
Load Tap
Changer
(LTC)
AMI
Feeder Breaker
8
CVR Protocol No 1
Questions
1. Does the CVR Protocol No 1 meet minimum RTF guidelines
for Custom Site-Specific savings estimate and costeffectiveness 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 1
Issues
1.
2.
3.
4.
5.
6.
7.
8.
9.
Verification of statistical methods to adequately evaluate savings
Simplified statistical measure savings calculation methods
Distribution load flow analysis requirements
Facility data requirements of lines, equipment, and loads
Characteristic load models (ZIP) requirements
Historical load data and temperature data requirements
Distribution system efficiency impacts
Location and number of voltage EOL measurements
Location and number of temperature sensors
10
CVR Protocol No 1
Issues
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)
11
CVR Protocol No 1
Homework
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 1
Homework
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)
9.
10.
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