NR - ULDC SCHEMENR - ULDC SCHEME

POINTS OF CONCERNPOINTS OF CONCERN

POINTS OF CONCERN

1. 1. LACK OF REDUNDANCY LACK OF REDUNDANCY

2. 2. FREQUENT BUGS IN SCADA FREQUENT BUGS IN SCADA SOFTWARESOFTWARE

3. 3. INCOMPLETE REPORTING SYSTEM INCOMPLETE REPORTING SYSTEM

4. 4. EMS – INCOMPATIBLE PACKAGESEMS – INCOMPATIBLE PACKAGES

6. 6. SOME IMPORTANT PROJECT SOME IMPORTANT PROJECT SPECIFIC WORKS STILL PENDINGSPECIFIC WORKS STILL PENDING

5. 5. PROLONGED DATA INTERRUPTIONS PROLONGED DATA INTERRUPTIONS DUE TO POWER SUPPLY PROBLEMSDUE TO POWER SUPPLY PROBLEMS

RTUs

SUBLDCDS

SLDCICCP

RSCCICCP

RSCCDS

SLDCOPERATOR CONSOLE

SLDCDS

SLDCICCP

SLDCDS

RTUs

SUBLDCDS

RTUsRTUs

RTUs

CPCC

RTUs

CS RTUs REPORTING

TO RSCC

DATA OF CS & OTHER

SLDCs

DATA OF CS &

OTHER SLDCs

RTUS REPORTING

TO SLDC

RTUs REPORTING

TO RSCC

Data flow in ULDC scheme

RTUs REPORTING

TO SLDC

RSCCOPERATOR CONSOLE

SLDCOPERATOR CONSOLE

PANIPAT

MURADNAGAR

DADRI-HVDC

BALLABGARH

BADARPUR

OKHLA

MALVIYANAGAR

MEHRAULIVASANT KUNJ

SONEPAT

BAWANA

PATPARGANJ

IP EXT

SARITA VIHAR

J & K, PUNJAB, BBMB, HPSEB

UPSEB

J & K, PUNJAB,BBMB,HPSEBMAIN DATA S/B DATA

UP SEBMAIN DATA S/B DATA

DELHI

DELHIMAIN DATA S/B DATA

NARELA-JHANGIRPURI- GOPALPUR-WAZIRABAD

KANJHAWALANAJAFGARH

RSCC

ABAMNAULI

RAJESTHANMAIN

STD BY

CRITICAL STATION AFFECTING COMMUNICATION LINK FROM

SLDCs TO RSCC

MOST CRITICAL STATION AFFECTING ALL MAIN & MOST CRITICAL STATION AFFECTING ALL MAIN & STANDBY DATA OF ALL SLDCs : STANDBY DATA OF ALL SLDCs : BADARPURBADARPUR

SECOND MOST CRITICAL STATION AFFECTING MAIN SECOND MOST CRITICAL STATION AFFECTING MAIN DATA OF ALL SLDCs :DATA OF ALL SLDCs : MURADNAGAR-I MURADNAGAR-I

: : DADRI HVDCDADRI HVDC :BALLABGARH:BALLABGARH

OUTAGE OF OUTAGE OF PANIPAT & DHULKOTEPANIPAT & DHULKOTE WILL ALSO WILL ALSO AFFECTAFFECT main and standby of main and standby of ALL SLDCs EXCEPT UP & ALL SLDCs EXCEPT UP & RAJASTHANRAJASTHAN

FREQUENT PROBLEMS OF COMMUNICATION SYSTEM

POWER SUPPLYPOWER SUPPLY LOAD SHEDDING IN RURAL LOCATIONSLOAD SHEDDING IN RURAL LOCATIONS HIGH RESTORATION TIME DUE TO UNMANNED REMOTE HIGH RESTORATION TIME DUE TO UNMANNED REMOTE

LOCATIONS.LOCATIONS.

• FIBER OPTIC CUTTING• ONLY UNDER GROUND CABLES AND APPROACH CABLE.

• FADING• E.g.- 1. Rihand-Singrauli Region ( No Diversity Antena)----Summer

2. Meerut – Muradnagar --------Winter

SCADA Support Functions

NETWORK SERVICES NETWORK PRINTING

MANAGEMENT.REMOTE PROCEDURE CALLREMOTE TERMINAL

SESSIONNETWORK TIME SYNCBACK UP OVER LANEMAIL

CONFIGURATION MANAGEMENTFACILITY TO ADD &

DELETE ADDRESSES AND LINKS, CONTROL DATA BLOCKS AND SET DATA TRANSMISSION AND RECEPTION PARAMETERS

MAINTAIN & CONTROLS GRAPHICAL DISPLAY OF NETWORK CONNECTIVITY AND DEVICE STATUS

PERFORMANCE MONITORING

MAINTAIN PERFORMANCE, RESOURCE USAGE AND ERROR STATISTICS FOR ALL MANAGED LINKS AND DEVICES.

PROVIDE FACILITIES FOR PATH AND ROUTING CONTROL AND QUEUE SPACE CONTROL

FAULT MANAGEMENT ALARMS FOR ERROR

HANDLING.REMOTE AND LOCAL

DIAGNOSTICS

SCADA Problems

CFE hanging frequently at many locations resulting CFE hanging frequently at many locations resulting into loss of RTUinto loss of RTU

Frequent failure of Applications resulting into Frequent failure of Applications resulting into failure of DATA SERVERS. Interruption of data and failure of DATA SERVERS. Interruption of data and loss of HIM data.loss of HIM data.

In HDR different values at the same time point with In HDR different values at the same time point with change of sample ratechange of sample rate

In HIM Frequent crashing of Oracle, reset of juke In HIM Frequent crashing of Oracle, reset of juke box,long term storage of Databox,long term storage of Data

Reports for MIN,MAX,Avg still not available Reports for MIN,MAX,Avg still not available

SCADA Problems (continued)

LAN-B/NETIO problemLAN-B/NETIO problem Shortcoming in trending functions ( scale , tabular Shortcoming in trending functions ( scale , tabular

etc.)etc.) Frequent tripping of UPS especially at SUBLDC Frequent tripping of UPS especially at SUBLDC

level.level. Non deployment of the trained person at SUBLDC Non deployment of the trained person at SUBLDC

levellevel

OPERATION SCHEDULING

Load forecastingInflow forecastingUnit commitmentHydro schedulingHydro Thermal

CoordinationInterchange schedulingInterchange transaction

evaluationCurrent operating planOutage scheduling

POWER SYSTEM ANALYSIS

Network Topology

State estimationContingency

analysisOptimal power

flowTransmission

loss sensitivity factors

Post disturbance analysis

LOAD GENERATION BALANCE

Operation monitoringAGC Economic despatchReserve monitoringLoadshed /Restoration Production costing

EMS SOFTWARE FUNCTIONS

EMS PROBLEMS-RESOURCE SCHEDULING &

COMMITMENT (RSC)

Scheduling Philosophy 15 minutes block instead of Scheduling Philosophy 15 minutes block instead of hourly.hourly.

Regional and Inter-regional bi-lateral not coveredRegional and Inter-regional bi-lateral not covered Desired treatment of Hydro station not providedDesired treatment of Hydro station not provided Share/Entitlement not provided as per requirementShare/Entitlement not provided as per requirement Unit wise scheduling instead of Plant wiseUnit wise scheduling instead of Plant wise No provision of Regional and inter-regional lossesNo provision of Regional and inter-regional losses ..

EMS NETWORK APPLICATIONS (State Estimation,Contingency

Analysis,Security Enhancement)

Non-Availability of Complete Status of CBs and Non-Availability of Complete Status of CBs and Isolators through Telemetry.Isolators through Telemetry.

Non-Availability of complete Generator data such Non-Availability of complete Generator data such as capability curve etc. Database modelled with as capability curve etc. Database modelled with typical generators.typical generators.

Critical SERVERS of ULDC WAN.

Data server at SUBLDCData server at SUBLDCICCP server at SLDCICCP server at SLDCICCP server at RSCCICCP server at RSCCData server at RSCCData server at RSCC

DATA from each control centre is important in the system to get good results of EMS applications .

DISPATCHER TRAINING

SIMULATOR

DTS -Application

Primary use:

Training of Dispatchers for routine and emergency scenario in a controlled and safe off-line manner.

Network split, blackouts

Large voltage or frequency excursions

Engineering tool for operations planning(generation plans, network switching, etc..) and for understanding of power system behavior.

DTS -Application

Tuning of EMS applications (Network, Generation etc.)

Test bed for new EMS functions

Validating new databases before upgrading EMS

Factory acceptance tests

Demonstrations

DTS –PROBLEMUNABLE TO INITIALISE FROM REAL TIME

Recent Problem

Data is being interrupted in case of outage of standby Data is being interrupted in case of outage of standby Links in spite of availabIlity of Main links.Links in spite of availabIlity of Main links.E.g Outage of sarita Vihar (07.11.03) and Wazirabad E.g Outage of sarita Vihar (07.11.03) and Wazirabad (12.11.03)(12.11.03)Testing was carried out on 11.11.03 by manualy Testing was carried out on 11.11.03 by manualy switching of MCB at Sarita Vihar.switching of MCB at Sarita Vihar.

RTU Reporting Status

1. Total RTUs-3662. RTUs Integrated-3333. RTUs Reporting- 275

BEMINA SUBLDC HAVING 8 RTUs

NOT INTEGRATED.

Pending important Analog points

1 Gross unit generation data for 1 Gross unit generation data for Badarpur,Singrauli, Unchahar not available.Badarpur,Singrauli, Unchahar not available.

2 Unit generation data of Dadri-Gas, 2 Unit generation data of Dadri-Gas, Anta ,Chamera and Auriya not available.Anta ,Chamera and Auriya not available.

3 Few line/ICT flows not available.3 Few line/ICT flows not available.

Pending important Digital points

1. NTPC- AURIYA, BADARPUR,DADRI-GAS1. NTPC- AURIYA, BADARPUR,DADRI-GAS 2. POWERGRID- SOME POINTS PENDING.2. POWERGRID- SOME POINTS PENDING. 3. DTL- 50 % PENDING3. DTL- 50 % PENDING 4. UPPCL- 30 % PENDING4. UPPCL- 30 % PENDING 5. RVPNL- 20 % PENDING 5. RVPNL- 20 % PENDING

PLCC LINK PROBLEM

11. EITHER MAIN OR STAND BY LINK FOR AGRA, . EITHER MAIN OR STAND BY LINK FOR AGRA, ALLAHABAD, FARIDABAD –PP, MEERUT, ALLAHABAD, FARIDABAD –PP, MEERUT, VINDHYACHAL,ABDULLAPUR, MALERKOTLA, VINDHYACHAL,ABDULLAPUR, MALERKOTLA, NALLAGARH AND SRINAGAR NOT WORKING.NALLAGARH AND SRINAGAR NOT WORKING.

2. EITHER MAIN OR STANDBY LINK FOR SALAL, 2. EITHER MAIN OR STANDBY LINK FOR SALAL, BAIRASUIL, CHAMERA, URI, ANTA,AURIYA, BAIRASUIL, CHAMERA, URI, ANTA,AURIYA, UNCHAHAR, NARORA AND RAPP NOT WORKING.UNCHAHAR, NARORA AND RAPP NOT WORKING.