AMI Analytics Development at AEP. Ken Dimpfl AEP SWEMA - June 2014

Transcription

1 AMI Analytics Development at AEP Ken Dimpfl AEP SWEMA - June 2014

2 AEP Facts Employees: 18,712 States Served: Arkansas, Indiana, Kentucky, Louisiana, Michigan, Ohio, Oklahoma, Tennessee, Texas, Virginia, West Virginia Transmission: 39,000 miles Distribution: 216,000 miles Generation: 38,000 MW US Customers: 5.3 Million US electricity sales: 206 MegaWh

3 AEP s AMI Systems AEP utilizes two mesh network AMI systems L+G Command Center AEP Texas over 1M meters L+G Focus AX and GE KV2c meters Silver Springs Networks UIQ - GE I-210+c and KV2c meters Columbus, OH 135K meters South Bend, IN 10K meters Tulsa, OK 32K meters

4 Summary of Analysis Performed System Temprature Monitoring QOS KV2C Site Genie Voltage Magnitude Analysis High Voltage & Voltage Monitoring Resistors in Meters Disconnected Meter Bypassed SSN - UIQ Daily Monthly N/A Monthly Future Daily L+G GridStream Daily Devlopment Monthly Monthly Daily Daily

5 Temperature Analytic Modeling History Meter High Temp Alarm set to 95 C In most cases we would find damaged equipment, too late. Late 2011, working with GE, Manufacturer Table 113 [Power Quality Table] provides temperature at the time of the sweep on the meters TERIDIAN MPU Chip via C12.19 schedule read in SSN UIQ. Selected 130 F or the 10 highest temperatures and worked closely with the field.

6 30000 Meter Temperature Distribution Airport Weather Data Number of Meters /25/11 at 8PM 11/5/11 at 12PM Ambient Air Temperature Sunshine Minutes in the Hour 11/25/11 at 8PM /5/11 at 12PM Degrees F

7 Temperature, ⁰F Sunshine Minutes AEP Lab test effects of sunlight on meter lead to sampling meter temperature at night time.

8 AEP Lab tested the correlation between kw load and meter temperature, showed negligible. Ambient room temperature in the CML lab = 72 F Internal temp test of GE I-210+c NMD06 sn (SSN NIC 210) Tested on WECO model 2300 test board 10kw 240 volts (41.6 amps) Temperature reading - Temperature reading - Built-in meter sensor installed thermocouple (read through UIQ) Potential only for 15 min 88.0 F kw load after 30 min 90.3 F kw load after 60 min 91.0 F 89.6 F 10kw load after 90 min 91.0 F 87.8 F

9 This meter was among 10 hottest in winter but was indoors in meter closet, no issue. Lead to monitor standard deviation ratio overtime.

10 Hot Socket=Standard Deviation ratio> 2 but still needed improvement.

11 Normal Distribution Function Simulated: Number of Meters Actual Distribution Simulated Corrected Simulated Corrected Simulated: X=Ratio

12 Disregard below -1σ to correct 400 Number of Meters Ratio > Ratio

13 Number of Meters Number σ from µ

14 Temperature Analytics Results Monitoring over 2 years, currently 500,000 meters 765 Issues to 949 Orders, 80.6% accurate

15 QOS - Site Genie Transformer Rated Services Use SAS to decode then analyze the vectors. Broken CT and PT on transformer rated meters, poor connections under billing of commercial customers. New customer validation of service, saved Ohio 208 site visits this year. Issues Population Ohio 38 5, % PSO 19 1, % I&M 0 473

16 Voltage Magnitude Analysis Transformer Rated Meters Description of Issue Number Next Step: Create automated programs to analyze. Corrected Service Type in Meter 8 Bad Cable 2 Service Incorrect in CIS 2 Bad PT 2 Blown Transformer Fuse 1 Theft 1 No Issues 1 Total Feedback 17

17 2S on 12S Service: 75% registration Texas Voltage Magnitude Monitoring Hi Volt/Failing Transformers 111 found Oct. 13 to Feb. 14

18 FUTURE: Energy Diversion Detection Monitor Load Profile Analyze the Voltage and kwh of Load Profile Flag premises with high voltage drop but low kwh compared to neighbors. Program flagging premises documented on the wrong transformer.

19 FIRST: Clean Up GIS Data Correlate Premises to Proper Transformer 2179 South

20 Implanted resistor simulate low power factor at high amps, monitor instantaneous readings. Implanted Resistors

21 Meter Tampering Bypassed Disconnected Meters AMI meters with disconnect switches will provide an alarm when the meter is in a disconnected state and the meter senses load side voltage. We have been able to bring back this alarm and have successfully identified over 250 cases of tampering with 100% success rate. This analysis is run daily.

22 Feedback is critical to Analytical Analysis The Feedback is used to evaluate the analysis process to make output more accurate, typical of a control system. Input: AMI Data + + Analysis: Feedback + AMI Data with SAS Output: Orders for Field Investigations Feedback: Meter Electrician s Findings