CVR Protocol No. 1 Approved April 14 th , 2004

1. CVR Protocol No. 1Approved April 14th, 2004 • CVR Protocol No 1 can be applied to distribution systems with Residential, Commercial, and Industrial customers. • 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. • 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. • Verification of energy savings is determined using statistical analysis by calculating CVR factors (weekdays and weekends) for each weather season correlated for temperature. 1

2. CVR Protocol No. Approved April 14th, 2004 • 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% • 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. • The Automated CVR ‘off’ setting is be 2 Volts above the CVR ‘on’ setting for two to four week periods. • Statistical analysis is performed using the UtiliData CVR Estimation Method. 2

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 3

4. Volts 126 120 114 Feeder Length Automated Voltage Regulation Techniques Existing Vset = 125V 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 • Old voltage setting Vset = 125V, R and X settings = 0 • New voltage setting Vset = 119V, Veol feedback Vset = Adjusts for load conditions based on end of line feedback 4

5. Volts 126 120 114 Feeder Length CVR Protocol No 1 Measurements Existing Vset = 125V Automatic Voltage Feedback Control (AVFC) • Measure Energy at Substation - Esub • Measure Voltage at End of Line – Veol • Measure Temperature at Substation - Tsub Vset = Adjusts for load conditions based on end of line feedback Esub Tsub Veol 5

6. Primary Voltage Zone Secondary Voltage Zone VCZ for LTC Transformer Feeder Load Tap Changer (LTC) Feeder Breaker Typical Distribution System Voltage Control Zone Veol Esub Cap

7. VCZ for LTC VCZ for V-Reg Transformer Feeder V-Reg Load Tap Changer (LTC) Feeder Breaker Multiple Voltage Control Zones Cap

8. VCZ for LTC VCZ for V-Reg Transformer Feeder V-Reg Load Tap Changer (LTC) Feeder Breaker Typical Automated CVR with Volt/Var Control Cap AMI AMI

9. CVR Protocol No 1Questions • Does the CVR Protocol No 1 meet minimum RTF guidelines for Custom Site-Specific savings estimate and cost-effectiveness calculation methodology? • Is the CVR Protocol No 1 applicable to a wide variety of distribution systems configurations and operation practices? • Does the CVR Protocol No 1 adequately ensure comprehensive distribution system cost-effective efficiency? • Does the CVR Protocol No 1 adequately ensure that distribution system safety and facility standards are meet? • What changes are necessary to simplify the automated CVR protocol requirements and calculation methods? 9

10. CVR Protocol No 1Issues • 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

11. CVR Protocol No 1Issues • Voltage measurement locations (e.g., Veol, Vsub, Vreg, Vcap) • System average voltage or end-of-line average voltage • System performance requirements (i.e., Vmax, Vmin PFmin, VDsec-max, Vsource-max, VDpri-max, Control Bandwidth) • Application to wide variety of automated CVR volt/var systems • Simplified statistical measure savings calculation methods • Distribution system loss impacts • RTF custom or standard site-specific protocol requirements • Sunset criteria (re-verification) 11

12. CVR Protocol No 1Homework • Review existing CVR No.1 protocol for application to a wide variety of distribution system configurations and operations • Review RTF guidelines for development of RTF savings estimation methods • 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. • 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. • Suggest simplified automated CVR statistical methods, measurements, and data needed to evaluate measure savings 12

13. CVR Protocol No 1Homework • Evaluate the protocol effectiveness to ensure comprehensive distribution efficiency and facility safety • Test CVR Protocol No 1 statistical methods using NEEA DEI 2007 Study Pilot Substation data (10 substations and 31 feeders) • Test simplified automated CVR statistical methods using NEEA DEI 2007 Study Pilot Substation data (10 substations and 31 feeders) 13