Transcript RTUs - srldc

NR - ULDC SCHEME
POINTS OF CONCERN
POINTS OF CONCERN

1. LACK OF REDUNDANCY

2. FREQUENT BUGS IN SCADA SOFTWARE

3. INCOMPLETE REPORTING SYSTEM

4. EMS – INCOMPATIBLE PACKAGES

5. PROLONGED DATA INTERRUPTIONS
DUE TO POWER SUPPLY PROBLEMS

6. SOME IMPORTANT PROJECT SPECIFIC
WORKS STILL PENDING
Data flow in ULDC scheme
SLDC
RSCC
OPERATOR CONSOLE
SLDC
OPERATOR CONSOLE
OPERATOR CONSOLE
RTUs
REPORTING
TO RSCC
RTUs
SLDC
DS
RTUs
REPORTING
TO SLDC
SUBLDC
DS
RTUs
SLDC
ICCP
RTUs
RTUS
REPORTING
TO SLDC
DATA OF
CS &
OTHER
SLDCs
RSCC
ICCP
CPCC
RTUs
SLDC
DS
RSCC
DS
DATA OF CS &
OTHER SLDCs
RTUs
SLDC
ICCP
CS RTUs
REPORTING
TO RSCC
SUBLDC
DS
RTUs
J & K, PUNJAB, BBMB, HPSEB
DELHI
MAIN DATA
J & K, PUNJAB,BBMB,HPSEB
MAIN DATA
S/B DATA
UP SEB
MAIN DATA
S/B DATA
SONEPAT
KANJHAWALA
NAJAFGARH
UPSEB
S/B DATA
PANIPAT
BAWANA
MURADNAGAR
NARELA-JHANGIRPURI- GOPALPUR-WAZIRABAD
-
DADRI HVDC
BAMNAULI
A
PATPARGANJ
DELHI
STD BY
BALLABGARH
IP EXT
OKHLA
SARITA VIHAR
BADARPUR
MALVIYANAGAR
RSCC
VASANT KUNJ
RAJESTHAN
MAIN
MEHRAULI
CRITICAL STATION AFFECTING
COMMUNICATION LINK FROM
SLDCs TO RSCC

MOST CRITICAL STATION AFFECTING ALL MAIN &
STANDBY DATA OF ALL SLDCs : BADARPUR

SECOND MOST CRITICAL STATION AFFECTING MAIN
DATA OF ALL SLDCs
: MURADNAGAR-I
: DADRI HVDC
:BALLABGARH



OUTAGE OF PANIPAT & DHULKOTE WILL ALSO AFFECT
main and standby of ALL SLDCs EXCEPT UP &
RAJASTHAN
FREQUENT PROBLEMS OF COMMUNICATION
SYSTEM
 POWER
SUPPLY
 LOAD SHEDDING IN RURAL LOCATIONS
 HIGH RESTORATION TIME DUE TO UNMANNED REMOTE
LOCATIONS.
• FIBER OPTIC CUTTING
• ONLY UNDER GROUND CABLES AND APPROACH CABLE.
• FADING
• E.g.- 1.
2.
Rihand-Singrauli Region ( No Diversity Antena)----Summer
Meerut – Muradnagar --------Winter
SCADA Support Functions
CONFIGURATION
MANAGEMENT
FACILITY 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
FAULT
MANAGEMENT
ALARMS FOR ERROR
HANDLING.
 REMOTE AND LOCAL
DIAGNOSTICS

NETWORK SERVICES
 NETWORK PRINTING
MANAGEMENT.
 REMOTE PROCEDURE CALL
 REMOTE TERMINAL
SESSION
 NETWORK TIME SYNC
 BACK UP OVER LAN
 EMAIL
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
SCADA Problems
 CFE
hanging frequently at many locations resulting
into loss of RTU
 Frequent failure of Applications resulting into
failure of DATA SERVERS. Interruption of data and
loss of HIM data.
 In HDR different values at the same time point with
change of sample rate
 In HIM Frequent crashing of Oracle, reset of juke
box,long term storage of Data
 Reports for MIN,MAX,Avg still not available
SCADA Problems
(continued)
 LAN-B/NETIO
problem
 Shortcoming in trending functions ( scale , tabular
etc.)
 Frequent tripping of UPS especially at SUBLDC
level.
 Non deployment of the trained person at SUBLDC
level
EMS SOFTWARE FUNCTIONS
OPERATION
SCHEDULING
Load forecasting
Inflow forecasting
Unit commitment
Hydro scheduling
Hydro Thermal
Coordination
Interchange scheduling
Interchange transaction
evaluation
Current operating plan
Outage scheduling
LOAD GENERATION
BALANCE
Operation monitoring
AGC
Economic despatch
Reserve monitoring
Loadshed /Restoration
 Production costing
POWER SYSTEM
ANALYSIS
Network
Topology
State estimation
Contingency
analysis
Optimal power
flow
Transmission
loss sensitivity
factors
Post disturbance
analysis
EMS PROBLEMSRESOURCE SCHEDULING &
COMMITMENT (RSC)
 Scheduling
Philosophy 15 minutes block instead of
hourly.
 Regional and Inter-regional bi-lateral not covered
 Desired treatment of Hydro station not provided
 Share/Entitlement not provided as per requirement
 Unit wise scheduling instead of Plant wise
 No provision of Regional and inter-regional losses.
EMS NETWORK APPLICATIONS
(State Estimation,Contingency
Analysis,Security Enhancement)
 Non-Availability
of Complete Status of CBs and
Isolators through Telemetry.
 Non-Availability of complete Generator data such
as capability curve etc. Database modelled with
typical generators.
Critical SERVERS of ULDC WAN.
Data
server at SUBLDC
ICCP server at SLDC
ICCP server at RSCC
Data 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
Factory
new databases before upgrading EMS
acceptance tests
 Demonstrations
DTS –PROBLEM
UNABLE TO INITIALISE FROM REAL TIME
Recent Problem
Data
is being interrupted in case of outage of standby
Links in spite of availabIlity of Main links.
E.g Outage of sarita Vihar (07.11.03) and Wazirabad
(12.11.03)
Testing was carried out on 11.11.03 by manualy
switching of MCB at Sarita Vihar.
RTU Reporting Status
1. Total RTUs-366
2. RTUs Integrated-333
3. RTUs Reporting- 275
BEMINA SUBLDC HAVING 8 RTUs
NOT INTEGRATED.
Pending important Analog points
1
Gross unit generation data for
Badarpur,Singrauli, Unchahar not available.
 2 Unit generation data of Dadri-Gas, Anta
,Chamera and Auriya not available.
 3 Few line/ICT flows not available.
Pending important Digital points
 1.
NTPC- AURIYA, BADARPUR,DADRI-GAS
 2. POWERGRID- SOME POINTS PENDING.
 3. DTL- 50 % PENDING
 4. UPPCL- 30 % PENDING
 5. RVPNL- 20 % PENDING
PLCC LINK PROBLEM
 1. EITHER MAIN OR STAND BY LINK FOR AGRA,

ALLAHABAD, FARIDABAD –PP, MEERUT,
VINDHYACHAL,ABDULLAPUR, MALERKOTLA,
NALLAGARH AND SRINAGAR NOT WORKING.
2. EITHER MAIN OR STANDBY LINK FOR SALAL,
BAIRASUIL, CHAMERA, URI, ANTA,AURIYA,
UNCHAHAR, NARORA AND RAPP NOT WORKING.