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SPECIAL ENERGY METER STORES

SPECIAL ENERGY METER STORES. STORES THE FOLLOWING DATA DURING THE 10 DAYS PERIOD (i)15 MIN. BLOCKWISE ACTIVE ENERGY FOR 10 DAYS (ii)15 MIN. BLOCKWISE AVERAGE FREQUENCY FOR 10 DAYS ALL CASES OF VT SUPPLY FAILURES ALL CASES OF METER TIME ADJUSTMENTS. SPECIAL ENERGY METER STORES.

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SPECIAL ENERGY METER STORES

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  1. SPECIAL ENERGY METER STORES • STORES THE FOLLOWING DATA DURING THE 10 DAYS PERIOD (i)15 MIN. BLOCKWISE ACTIVE ENERGY FOR 10 DAYS (ii)15 MIN. BLOCKWISE AVERAGE FREQUENCY FOR 10 DAYS • ALL CASES OF VT SUPPLY FAILURES • ALL CASES OF METER TIME ADJUSTMENTS

  2. SPECIAL ENERGY METER STORES (v)AT MIDNIGHT OF EVERY DAY THE FOLLOWING ADDITIONAL DATA IS LOGGED IN METERS MEMORY • SL. NO. OF METER • CUMULATIVE ACTIVE ENERGY REGISTER – C • HIGH VOLTAGE REACTIVE ENERGY REGISTER – H • LOW VOLTAGE REACTIVE ENERGY REGISTER – L • DATE

  3. SPECIAL ENERGY METER DISPLAYS • IN A CYCLIC MANNER ON PRESSING A PUSH BUTTON (i) LED CHECK (ii) METER SERIAL NO. (iii) DATE (iv) TIME (v) ACTIVE ENERGY IN LAST 15 MIN. BLOCK (vi) AVERAGE FREQUENCY IN LAST 15 MIN. BLOCK (vii) CUMULATIVE ACTIVE ENERGY REGISTER – C

  4. SPECIAL ENERGY METER DISPLAYS (viii) HIGH VOLTAGE REACTIVE ENERGY REGISTER – H • LOW VOLTAGE REACTIVE ENERGY REGISTER – L • INSTANTANEOUS AVERAGE VOLTAGE • INSTANTANEOUS REACTIVE POWER

  5. SPECIAL ENERGY METER DATA COLLECTION • DATA COLLECTIVE DEVICE, A SMALL HAND HELD UNIT IS USED TO COLLECT DATA FROM SEM USING AN OPTICAL COUPLER CORD • THE SAME DCD IS USED TO DUMP THE SEM DATA INTO A PC USING SERIAL PORT COMMUNICATION CORD WITH THE HELP OF A MANUFACTURER SUPPLIED SOFTWARE

  6. Raw data WEEK FROM 0000 HRS OF 06-01-01 TO 0837 HRS OF 15-01-01 NP-0185-A 91858.5 99968.5 39195.5 06-01-01 00 51 +21.57 48 +21.68 50 +21.71 49 +21.33 04 19 +20.61 23 +20.80 19 +21.05 00 +21.35 08 00 +24.95 00 +24.95 00 +25.09 00 +24.38 12 71 +24.38 52 +23.98 30 +23.81 13 +24.03 16 00 +23.37 00 +23.52 00 +22.87 00 +21.66 20 00 +25.75 00 +25.32 00 +25.40 00 +25.37 NP-0185-A 94117.2 99968.5 40313.5 07-01-01 00 59 +20.94 54 +21.01 59 +20.79 58 +21.05 04 33 +20.05 38 +20.17 37 +20.49 28 +20.90 08 00 +22.99 06 +23.10 00 +22.81 00 +22.94 12 85 +20.93 51 +20.65 21 +20.79 00 +19.89 16 07 +20.14 01 +20.53 00 +20.72 00 +20.66 20 05 +23.62 08 +23.23 16 +23.25 27 +23.40 NP-0185-A 96172.2 99968.5 41236.9 08-01-01

  7. SPECIAL ENERGY METER DATA COLLECTION • WITH THE SAME SOFTWARE 4 CODED FILES ARE FORMED IN A BINARY FORM IN THE PERSONAL COMPUTER NAMELY *.MRI *.RDG *.SUR *.AMR

  8. SPECIAL ENERGY METER PRECAUTION • FOR THE METER: • SPECIAL ENERGY METER MAY BE PERIODICALLY CHECKED FOR THE LOW VOLTAGE L.E.D. INDICATION AS PER THE SPECIFICATION • THE PUSH BUTTON DISPLAY ON THE FRONT PANEL MAY BE MADE USE OF, FOR PERIODICAL CHECKING OF VARIOUS PARAMETERS MEASURED OR COMPUTED BY THE METER

  9. SPECIAL ENERGY METER PRECAUTION • FOR THE DATA COLLECTING DEVICE (DCD) • IT IS PREFERRED TO USE A FULLY CHARGED BATTERY WITH THE DCD BEFORE EVERY WEEKS DATA COLLECTION. A SPARE BATTERY AND BATTERY CHARGER ARE GIVEN WITH EACH DCD TO ENABLE RECHARGING OF USED BATTERY

  10. SPECIAL ENERGY METER PRECAUTION • IF BATTERY LOW INDICATION COMES DURING DATA COLLECTION, OLD BATTERY SHOULD NOT BE REMOVED FROM THE DCD UNTIL A NEW (FULLY CHARGED) BATTERY IS READY CLOSE BY FOR REPLACEMENT. DCD SHOULD BE IN OFF POSITION WHILE BATTERY REPLACEMENT IS MADE AND CHANGING BATTERY SHOULD BE COMPLETED IN 30 SECONDS OTHERWISE DATA WILL BE LOST. IT IS SUGGESTED TO USE SEMS MAINS ADAPTER TO POWER THE DCD WHILE THE BATTERY IS CHANGED WHICH MEANS THAT THE POWER SUPPLY TO DCD IS UNINTERRUPTED AND THERE IS NO HURRY TO FIT NEW BATTERY

  11. SPECIAL ENERGY METER PRECAUTION • FOR THE SEM DATA COLLECTION • ALL THE METER DATA IS TO BE COLLECTED UNIFORMLY ON THE SAME DAY i.e. MONDAY AFTER 0030 HRS. • IF THE LINE OR ICT TO WHICH THE SEM IS CONNECTED IS IN OPEN CONDITION AT THE TIME OF DATA COLLECTION, A VT SECONDARY SUPPLY OF 63.51V PHASE-NEUTRAL (SINGLE PHASE IS SUFFICIENT), FROM AN ADJACENT ICT OR LINE, IS TO BE EXTENDED TO THE METER FOR COLLECTING THE DATA STORED IN METERS MEMORY

  12. SPECIAL ENERGY METER PRECAUTION • FOR THE METER DATA: • SEM DATA WHEN DUMPED INTO THE PERSONAL COMPUTER HAS TO BE SCANNED FIRST FOR DATA CORRECTNESS AND COMPLETENESS • WHILE SCANNING, THE FOLLOWING ARE TO BE CHECKED MAINLY • (I) 15 MIN. Whr. DATA FORMAT SHOULD BE XX.XX (WITH PROPER SIGN), ALL NUMERALS, COMPUTER VIRUS MAY CHANGE THIS FORMAT

  13. SPECIAL ENERGY METER PRECAUTION • (ii) 15 MIN. FREQUENCY DATA FORMAT SHOULD BE XX ALL NUMERALS (FROM 00 TO 99). COMPUTER VIRUS MAY CHANGE THIS FORMAT. • (iiii) DATA SHOULD BE COMPLETE FOR 9 FULL DAYS AND PART FOR THE 10TH DAY

  14. SPECIAL ENERGY METER PRECAUTION • (iv) STAR MARKS IN 15 MIN. TIME BLOCKS INDICATING LOW VOLTAGE I.E. AVERAGE VOLTAGE < 70% P.U. SHOULD BE CROSS CHECKED WITH CORRESPONDING VOLTAGE RECORDING IN THE S/S CONTROL ROOM • (v) ANY TIME CORRECTIONS CARRIED OUT IN THE SEM SHOULD RELFECT IN THE RAW DATA AS ‘rr’ OR ‘aa’ IN SIX CONSECUTIVE 15 MIN. TIME BLOCKS STARTING FROM THE TIME OF CORRECTION.

  15. SPECIAL ENERGY METER DATA TRANSFER • AFTER PRELIMINARY SCANNING OF RAW DATA, EACH SUB-STATION TRANSMITTS TO SRLDC ON DOT LINES STD /LOCAL INTERNET PUNCOM/HOTLINE ONCE IN A WEEK AT EARLY HOURS EVERY MONDAY

  16. SPECIAL ENERGY METER DATA TRANSFER • THE SEM DATA IS ALSO COPIED ON A VIRUS FREE FLOPPY AND SENT BY COURIER TO SRLDC BY EACH S/S ON EVERY MONDAY AS A BACKUP MEASURE

  17. SPECIAL ENERGY METER DATA CHECK • THE SOFTWARE DEVELOPED BY SRLDC IS USED FOR CHECKING THE SEM DATA RECEIVED FROM SUBSTATION FOR COMPLETENESS AND CORRECTNESS • PRELIMINARY CHECKING OF DATA CORRECTNESS FOR SYNTAX • CHECKING OF DATA FOR COMPLETENESS FOR THE DESIRED PERIOD OF ACCOUNTING • SPLIT THE RAW DATA INTO A DATA BASE (DAYWISE & METERWISE)

  18. SPECIAL ENERGY METER VARIOUS CHECKS • FOLLOWING CHECKS ARE ALSO MADE TO PROVE DATA VALIDITY AND STRENGTH OF METER STORAGE CAPABILITY • VOLTAGE PROBLEM • FREQUENCY • TIME CORRECTION • WATTHOUR PROBLEM • PREVIOUS WEEK DATA • ALGEBRAIC SUM

  19. SPECIAL ENERGY METER DATA COMPUTING • AFTER OBTAINING SATISFACTORY RESULTS OF VARIOUS CHECKS, THE RAW DATA IN WHr IS CONVERTED INTO MWhr BY MULTIPLYING WITH RESPECTIVE METERS CT RATIO AND PT RATIO • A PAIRS CHECK IS ALSO CARRIED OUT FOR THE METERS CONNECTED ON BOTH SIDE OF ICTS, LINES AND GT SIDE & LINE SIDE AT CGS

  20. SPECIAL ENERGY METER DATA COMPUTING • IN SUCH CASES WHEN A SET CONDITION IS NOT SATISFIED .AND. IF THE LOW VOLTAGE PROBLEM EXISTS .AND. IF THE MAGNITUDE OF MAIN METER IS LESS THAN THAT OF THE STANDBY METER FOR THE CORRESPONDING LINE BLOCK, THEN THIS PARTICULAR MAIN METERS ENERGY IS REPLACED BY CORRESPONDING VALUE OF CHECK METER • THIS CHECK FACILITATES DETECTING OF MAL-FUNCTIONING/MIS-BEHAVIOUR OF METERS USED FOR ACCOUNTING

  21. SPECIAL ENERGY METER ENERGY ACCOUNT • USING THE COMPUTED DATA, SOME FICTITIOUS METERS ARE DEFINED, LIKE THE FOLLOWING, TO COMPUTE REGIONAL ENERGY ACCOUNTS • I) TOTAL DRAWAL BY A CONSTITUENT AT A STATION • II) TOTAL DRAWAL BY A CONSTITUTION IN THE REGION • III) TOTAL INJECTION BY A CGS EX-BUS • IV) PLOTTING LOAD CURVES/UTILITY CURVES FOR ANALYSIS AND LOAD MANAGEMENT

  22. SPECIAL ENERGY METER ENERGY ACCOUNT • (V) DAILY REACTIVE ENERGY DRAWAL BY CONSTITUENTS. • USER CAN CREATE OUTPUT FILES AS DESIRED BY SUITABLY MODIFYING THE CONFIGURATION FILES (FICT METERS) IN THE PROGRAM

  23. Computed Mwh data 230 kV Neyveli line at Pondicherry CTR = 600 PTR = 2091 PO-02 NP-0185-A 06-01-01 2833.8145 0.0 1402.6 0000 27.061722 27.199728 27.237366 26.760618 0100 26.911171 26.547337 26.735525 25.907490 0200 26.196047 25.932583 26.522243 26.622612 0300 26.509697 26.321507 25.844761 25.644024 0400 25.857307 26.095678 26.409328 26.798256 0500 26.785711 27.839575 28.567242 28.780525 0600 29.458008 29.269817 30.072762 30.198221 0700 31.126625 31.314816 31.289724 31.214447 0800 31.302271 31.302271 31.477915 31.603374 0900 31.603374 31.289724 31.402639 31.553190 1000 30.775339 31.201902 31.565735 31.515553 1100 31.603374 30.198221 30.424049 30.235861 1200 30.587147 30.085308 29.872025 30.148039 …. ….. ….. ….. ….. 2300 27.726660 27.350279 26.760618 26.346600

  24. Active energy ENERGY ACCOUNTING USING SPECIAL ENERGY METER FOR 01-11-02 --------------------------------------------- TIME VILLIANUR BAHUR YANAM Net Drawal (Neyveli) (Neyveli) by PONDY -------- ----- ----- in MWhr PO-02 PO-04 PO-06 --------------------------------------------- 00:00 +19.57 +9.22 +2.04 +30.83 00:15 +19.27 +9.15 +2.20 +30.62 00:30 +18.93 +9.37 +2.03 +30.33 00:45 +18.96 +8.46 +1.77 +29.18 01:00 +18.20 +8.27 +2.10 +28.57 01:15 +17.38 +8.53 +2.08 +27.98 01:30 +17.55 +8.83 +2.08 +28.46 01:45 +18.10 +9.06 +2.04 +29.20 02:00 +17.56 +9.15 +1.89 +28.60 02:15 +17.29 +8.93 +2.16 +28.38 02:30 +16.45 +8.77 +2.11 +27.33 02:45 +15.96 +8.72 +1.88 +26.55 03:00 +16.72 +8.66 +1.74 +27.12 03:15 +15.62 +9.10 +1.89 +26.60 03:30 +16.51 +9.17 +2.05 +27.73 03:45 +16.35 +8.88 +2.15 +27.38 04:00 +16.65 +7.92 +2.04 +26.61 04:15 +16.66 +8.10 +2.10 +26.86 04:30 +17.04 +7.53 +2.06 +26.62 04:45 +16.69 +8.28 +2.16 +27.12 05:00 +17.44 +8.79 +1.94 +28.18 05:15 +17.50 +8.64 +1.89 +28.03 05:30 +17.64 +9.30 +2.03 +28.96 05:45 +17.87 +9.21 +2.17 +29.25 06:00 +18.22 +9.16 +2.13 +29.51 …………………………………………………………………………………………………………… ………………………………………………………………………………………………………. 22:00 +27.39 +7.97 +1.84 +37.19 22:15 +25.72 +7.77 +2.16 +35.65 22:30 +25.88 +7.97 +2.08 +35.93 22:45 +24.97 +8.15 +2.19 +35.31 23:00 +24.04 +7.99 +2.11 +34.14 23:15 +23.13 +8.02 +0.76 +31.91 23:30 +23.85 +8.14 +0.69 +32.68 23:45 +24.09 +8.17 +0.80 +33.05 --------------------------------------------- TOTAL +2212.55 +860.94 +178.60 +3252.09

  25. Reactive energy accounting

  26. REASEM–PROGRAM MENU A. INITIALISE • DATA CORRECTNESS • CREATE DATA BASE • DATA RECEIVED • DATA NOT RECEIVED • VIEW RAW DATA B. VIEW • VIEW WH DATA • VIEW MWH DATA • VIEW FICT DATA • VIEW ANY FILE

  27. REASEM–PROGRAM MENU • C. CHECK • 1. VOLTAGE PROBLEM • 2. TIME CORRECTION • 3. PREVIOUS WEEK DATA • 4. FREQUENCY PROBLEM • 5. WATT HOUR PROBLEM • 6. ALGEBRAIC SUM • 7. ALL CHECK • D. COMPUTE • 1. COMPUTE ENERGY • 2. PAIR CHECK • 3. GENERATION SCHEDULE • 4. DRAWAL SCHEDULE • 5. COMPUTER FICT MTRS.

  28. REASEM–PROGRAM MENU • E. ACCOUNT • 1. MWH OUTPUT • 2. MVARH OUTPUT • 3. LOAD CURVE • 4. UTILITY CURVE • 5. TOTAL ENERGY • 6. REG. ENERGY ACCOUNT F. HELP • ABOUT • SEM DATA • PROGRAMME BRIEF • CONFIG FILES • REGIONAL ACCOUNT • WARNINGS

  29. THANK YOU

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