Interface Energy Metering

Transcription

1 Interface Energy etering B C A D E

2 Outline Need for etering List of Controls areas in WR Special Energy eter Regulatory Requirements Details of SEs in WR Drawal/Injection Computations Data processing at WRLDC WR Transmission loss Computation and its application Compliance andate Injection/Drawal/Loss Plots

3 Need for etering Name of Entity I.C/Share (W) Three part settlement:- DC/Entitlement (W) Schedule (W) Capacity Charge (Fixed Charges) (A) Energy Charge(Variable Cost)(B) Deviation Charges (C) Actual Interchange (W) Deviation (W) G.S-A State-B 600 (50%) State-C 600 (50%) Capacity Energy SE Data Deviation Deviation = Actual Schedule Actual Interchange and Frequency measured by SE Settled mutually Settled with DS rate

4 List of Control Areas in WR Drawal Entities Injecting Entities Gujarat KSTPS-I&II KAWAS Essar Power Dhariwal adhya Pradesh KSTPS-III GANDHAR B Power Vandana Vidhyut aharashtra VSTPS-I RGPPL SKS Power ACBIL Goa VSTPS-II DGEN DB Power Lara (Infirm) UT-DD VSTPS-III SASAN Jhabua Power Solapur (Infirm) UT-DNH VSTPS-IV CGPL RK Power ouda STG-2 (Infirm) ESIL VSTPS-V LANCO Jindal Power-I Jindal STG-2 (Infirm) BARC SIPAT-I KSK Jindal Power-II Bhadravati HVDC SIPAT-II GR-Warora DCPP Vindhyachal HVDC ouda GR Chhattisgarh KWPCL Champa HVDC NSPCL Jaypee Nigrie TRN Energy Total Drawal Entities = 11 Total Injecting Entities = 40 Total Drawal/Injecting Entities = 51

5 Special Energy eter Application Specific icroprocessor based solid state Energy meter Works on 3 Phase 4 wire principle Records Active Energy for every 15-min time block in Wh. (+ve sign for Wh export and a ve sign when there is a net Wh import) Two reactive energy registers, one for the period when average RS voltage is above 103% and for the period when the voltage is below 97% Working voltage of 63.5 V (Ph to N) Accuracy class of 0.2s Time stamped data Operating Voltage range +20% to -30% of Rated Voltage Operating Current range 0.2% to 200% of Rated Current Two types: 110 V,1 A and 110 V, 5 A Operates from power drawn on secondary side of PT Instrument Transformers of 0.5s accuracy class Stores data for a period of ten days, FIFO Interface points to be determined by RLDC eters to be installed and maintained by CTU

6 Average Frequency easurement: Computes Average Frequency for each 15 mins block from VT = Number of cycles in each block divided by 900 (15x60=900) Average Frequency of 15 min block stored as 2 digit code (00 to 99) Actual frequency in terms of Frq code = (2 digit code/100) aster eter (NP-2657-A) installed on 400 kv ahan line at KSTPS Alternate aster eter : SE at Durgapur ICT (NP-8804-A)

7 Location of SEs as per CEA etering Standards

8 Location of SEs

9 Details of SEs in WR Total no of SEs in WR = 1484 ain eters Standby eters Check eters SE make deployed in WR-ISTS S. No SE ake No of eters Data Format 1 L&T 594.DAT 2 SL 680.RI 3 ELSTER 210.R3

10 SE Data Format

11 Drawal Computations

12 Injection Computations

13 Regulatory Requirements for data submission IEGC : All entities shall have to submit SE data by Tues day. IEGC : RLDC shall have to submit processed data to RPC by Thursday. RLDC shall be open processed data to all entities for checking for a period of 15 days. Computed SE data is available at

14 Average Delay in hours for past 7 weeks PPTCL Nagda Pandhurna Bhopal Bhanpura Ujjain Balaghat Bina Annupur PG WRTS-2 Damoh Jabalpur agarwada Navsari Tamnar Raigarh Durg PG WRTS-1 Solapur Aurangabad Bhadravati NTPC Solapur Lara NPCIL Tarapur 3 & 4 IPPs DGEN Lanco ACBIL Vandana 5 0

15 SE data processing at WRLDC WRLDC SE data by Tuesday noon SE data from Substations Decoding of SE data Check for Complete data is Received or not Check for data correctness Processed Data by Thurs day noon RPC Preparation of DS and Reactive Energy Account and Publishes in WEB on every Tuesday SE data from generating stations Computation of Raw data Validation of SE data Incorporation of New elements(if any) RLDC s aintain POOL A/Cs SE data from other RLDC s for IR lines Computation of Drawal/Injection entity wise Constituents PSDF Computation of Regional Transmission loss

16 Reports Sent to WRPC / CERC WRPC Processed Generation data Processed Drawal data Discrepancy Report CERC C Report

17 WR Transmission Loss Computation and its application Transmission loss = Total injection Total Drawal % Transmission Loss = (Total Injection inus Total Drawal) x 100 Total Injection Average % loss of previous week(w-1) is used as Schedule Loss for the next week (W+1) for transactions over ISTS network Schedule losses for next week are declared on every Friday and will be available at and Total no of slabs defined by CERC are 9 and slab width is 0.25 CERC determines Injection and Drawal loss slabs on quarterly basis.

18 Compliance mandate Following activities to be informed promptly to RLDC Network reconfiguration New element charging Relocation of SEs Disconnection of CT/PT supply to SE for PU installation or eter Testing Submission Correct CT/PT ratios while first time charging of elements Timely download and submission of SE data to WRLDC (by Tuesday noon) Complete data from all SEs at a location Ensure healthiness of SE/DCD/Cable CT/PT supply to avoid under recording due to failures/loose connections Time synchronization of SEs to avoid abrupt changes in Generation/Drawal/Loss values

19 Recent SE cases observed Solapur(NTPC) wrong submission of CT ratio of ICT-1 Delay in data download: Loss of SE data at agarwada(pg) for dtd SE/DCD issues: Non receipt of data from Anuppur, Pandhurna, LARA NTPC and Korba(W) Time Drift: Abrupt change in Generation beyond its capacity at VSTPS CT/PT supply: Under recording at Gwalior(PG),Aurangabad(PG) etc Partial data submission: Wardha (PG), Kolhapur(STECL) etc

20 Transparency, Integrity and Probity of etering Complete Data available on Website Details of SEs in WR CT/PT ratios eter ID Location of SEs Processed data Generation data entity wise Feeder wise Drawal data entity wise Feeder wise WR loss data 15 min block wise Discrepancy Report Weekly wise

21 WR transmission Loss curve for the week to WR Schedule transmission loss for the week to is 3.2%

22 Injection Plot 24/10/16 25/10/16 26/10/16 27/10/16 28/10/16 29/10/16 30/10/16 Date

23 Drawal Plot 24/10/16 25/10/16 26/10/16 27/10/16 28/10/16 29/10/16 30/10/16 Date

24 Thank you

25 Delay in Hrs Data submission Plot 60 WEEK 1 WEEK 2 WEEK 3 WEEK 4 WEEK 5 WEEK 6 WEEK 7 PANDHURNA Jabalpur PG CHANDRAPUR Bhopal BHANPURA NAGDA UJJAIN AGARPADA PG

26 Delay in data submission (cumulative hours for a week) WEEK 1 WEEK 2 WEEK 3 WEEK 4 WEEK 5 WEEK 6 WEEK 7