SPECIAL ENERGY METER SPECIAL ENERGY METER STORESSTORES

• 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

(iii) ALL CASES OF VT SUPPLY FAILURES(iv) ALL CASES OF METER TIME

ADJUSTMENTS

SPECIAL ENERGY METER SPECIAL ENERGY METER STORESSTORES

(v)AT MIDNIGHT OF EVERY DAY THE FOLLOWING ADDITIONAL DATA IS LOGGED IN METERS MEMORY

(1) SL. NO. OF METER(2) CUMULATIVE ACTIVE ENERGY REGISTER – C(3) HIGH VOLTAGE REACTIVE ENERGY

REGISTER – H(4) LOW VOLTAGE REACTIVE ENERGY

REGISTER – L(5) DATE

SPECIAL ENERGY METER SPECIAL ENERGY METER DISPLAYSDISPLAYS

• 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

SPECIAL ENERGY METER SPECIAL ENERGY METER DISPLAYSDISPLAYS

(viii) HIGH VOLTAGE REACTIVE ENERGY REGISTER – H

(ix) LOW VOLTAGE REACTIVE ENERGY REGISTER – L

(x) INSTANTANEOUS AVERAGE VOLTAGE

(xi) INSTANTANEOUS REACTIVE POWER

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA COLLECTIONDATA 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

Raw dataWEEK FROM 0000 HRS OF 06-01-01 TO 0837 HRS OF 15-01-01NP-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 +21.3508 00 +24.95 00 +24.95 00 +25.09 00 +24.38 12 71 +24.38 52 +23.98 30 +23.81 13 +24.0316 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 +20.9008 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 +20.6620 05 +23.62 08 +23.23 16 +23.25 27 +23.40 NP-0185-A 96172.2 99968.5 41236.9 08-01-01 

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA COLLECTIONDATA COLLECTION

• WITH THE SAME SOFTWARE 4 CODED FILES ARE FORMED IN A BINARY FORM IN THE PERSONAL COMPUTER NAMELY

*.MRI

*.RDG

*.SUR

*.AMR

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• 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

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• 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

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• 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

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• 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

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• 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

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• (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

SPECIAL ENERGY METER SPECIAL ENERGY METER PRECAUTIONPRECAUTION

• (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.

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA TRANSFERDATA 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

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA TRANSFERDATA 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

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA CHECKDATA 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)

SPECIAL ENERGY METER SPECIAL ENERGY METER VARIOUS CHECKSVARIOUS 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

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA COMPUTINGDATA 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

SPECIAL ENERGY METER SPECIAL ENERGY METER DATA COMPUTINGDATA 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

SPECIAL ENERGY METER SPECIAL ENERGY METER ENERGY ACCOUNTENERGY 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

SPECIAL ENERGY METER SPECIAL ENERGY METER ENERGY ACCOUNTENERGY 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

Computed Mwh data230 kV Neyveli line at PondicherryCTR = 600 PTR = 2091PO-02 NP-0185-A 06-01-01 2833.8145 0.0 1402.60000 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  

Active energyENERGY 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 +30.8300:15 +19.27 +9.15 +2.20 +30.6200:30 +18.93 +9.37 +2.03 +30.3300:45 +18.96 +8.46 +1.77 +29.1801:00 +18.20 +8.27 +2.10 +28.5701:15 +17.38 +8.53 +2.08 +27.9801:30 +17.55 +8.83 +2.08 +28.4601:45 +18.10 +9.06 +2.04 +29.2002:00 +17.56 +9.15 +1.89 +28.6002:15 +17.29 +8.93 +2.16 +28.3802:30 +16.45 +8.77 +2.11 +27.3302:45 +15.96 +8.72 +1.88 +26.5503:00 +16.72 +8.66 +1.74 +27.1203:15 +15.62 +9.10 +1.89 +26.6003:30 +16.51 +9.17 +2.05 +27.7303:45 +16.35 +8.88 +2.15 +27.3804:00 +16.65 +7.92 +2.04 +26.6104:15 +16.66 +8.10 +2.10 +26.8604:30 +17.04 +7.53 +2.06 +26.6204:45 +16.69 +8.28 +2.16 +27.1205:00 +17.44 +8.79 +1.94 +28.1805:15 +17.50 +8.64 +1.89 +28.0305:30 +17.64 +9.30 +2.03 +28.9605:45 +17.87 +9.21 +2.17 +29.2506:00 +18.22 +9.16 +2.13 +29.51…………………………………………………………………………………………………………………………………………………………………………………………………………………….22:00 +27.39 +7.97 +1.84 +37.1922:15 +25.72 +7.77 +2.16 +35.6522:30 +25.88 +7.97 +2.08 +35.9322:45 +24.97 +8.15 +2.19 +35.3123:00 +24.04 +7.99 +2.11 +34.1423:15 +23.13 +8.02 +0.76 +31.9123:30 +23.85 +8.14 +0.69 +32.6823:45 +24.09 +8.17 +0.80 +33.05---------------------------------------------TOTAL +2212.55 +860.94 +178.60 +3252.09

Reactive energy accountingREACTIVE ENERGY ACCOUNTING USING SPECIAL ENERGY METER

DATE BANGALORE MINURABAD DAVANGERE HOODY Total Drawal (ICT 1&2) (ICT 1) (ICT 1) (ICT 1&2) of KPTCLMVARh_l MVARh_l MVARh_l MVARh_l MVARh_l

01-Aug-00 593.00 57.60 4435.00 3843.40 8929.0002-Aug-00 1525.30 21.80 4096.00 4520.60 10163.7003-Aug-00 4384.30 249.10 4313.70 4789.00 13736.1004-Aug-00 3986.50 -17.60 3296.60 2345.10 9610.6005-Aug-00 2474.60 2.50 527.00 2989.10 5993.2006-Aug-00 1882.00 0.00 0.40 1183.90 3066.3007-Aug-00 3538.50 0.00 -13.50 1966.90 5491.9008-Aug-00 4301.00 0.00 -123.40 2166.20 6343.8009-Aug-00 3087.70 0.00 -18.00 2166.50 5236.2010-Aug-00 3336.80 0.00 -27.30 2574.00 5883.5011-Aug-00 4956.60 -126.90 514.00 3489.10 8832.8012-Aug-00 5789.20 -90.00 -16.00 3637.20 9320.4013-Aug-00 4758.80 -0.40 585.20 3521.70 8865.3014-Aug-00 4219.50 0.00 3.60 2971.30 7194.4015-Aug-00 2919.70 0.00 10.20 2626.60 5556.5016-Aug-00 5324.20 -0.90 112.90 3128.40 8564.6017-Aug-00 5803.40 -71.10 189.40 2889.90 8811.6018-Aug-00 5515.50 -97.10 86.70 3450.10 8955.2019-Aug-00 5896.10 -50.00 56.70 3370.10 9272.9020-Aug-00 3678.90 -25.80 83.80 2720.00 6456.9021-Aug-00 4880.60 0.00 -319.20 3449.30 8010.7022-Aug-00 4234.50 -5.60 -206.20 3400.70 7423.4023-Aug-00 3489.80 0.00 -65.10 1799.40 5224.1024-Aug-00 5388.90 0.00 -68.20 2640.60 7961.3025-Aug-00 4709.40 -18.00 -198.70 3325.00 7817.7026-Aug-00 4364.30 0.40 -181.80 3181.60 7364.5027-Aug-00 3114.60 0.00 -68.40 1880.00 4926.2028-Aug-00 5266.70 -232.00 -36.20 3686.00 8684.5029-Aug-00 6818.20 -343.20 126.20 3476.00 10077.2030-Aug-00 6149.90 -364.30 828.50 3609.80 10223.9031-Aug-00 7448.40 -452.70 249.60 4050.20 11295.50

TOTAL 133836.90 -1564.20 18173.50 94847.70 245293.90

REASEMREASEM–PROGRAM MENU–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

REASEM–PROGRAM MENUREASEM–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.

REASEM–PROGRAM MENUREASEM–PROGRAM MENU• E. ACCOUNT• 1. MWH OUTPUT• 2. MVARH OUTPUT• 3. LOAD CURVE• 4. UTILITY CURVE• 5. TOTAL ENERGY• 6. REG. ENERGY ACCOUNTF. HELP1. ABOUT2. SEM DATA3. PROGRAMME BRIEF4. CONFIG FILES5. REGIONAL ACCOUNT6. WARNINGS