Transcript Discussion on Draft Restoration (Black Start)procedures

Discussion on
Draft Restoration
(Black Start)procedures
• Chapter I- Introduction
• Chapter II-Details about
– The generating stations with Black Start
facility
– Survival power requirement
– Startup power requirement
– Generating substations /Substations with
Synchronising facility
– Railway traction substations
• Chapter III-System restoration approach
• Chapter IV Details the procedure
Broad Guide line Adopted In Developing the
Procedure
Geographical area
Systems covered
Section
covering the
procedure
Andrapradesh
Andrapradesh and NTPC
Ramagundam
4.1
Karnataka
Karnataka and Kaiga APP
4.2
Kerala
Kerala and Rajeev Gandhi
CCPP
4.3
Tamilnadu
Tamilnadu, Pondy, Neyveli
TSII,TSI Epansion,MAPP
4.4
Broad Guide line Adopted In Developing
the Procedure
• Each state has been divided in to
subsystems on the basis of the natural
separation taking place during
disturbances
• Source for providing startup powers has
been identified for each subsystem both
from with in the subsystem and also from
outside the subsystem for early restoration
of the power system.
Procedure details the following
• Source of startup power in case of
– total blackout of the region,
– blackout of the entire state system
– blackout of the subsystem alone
• Identifying the loads for each subsystem
• Points of synchronization with other sub
systems
• Actions to be taken by various generating
stations and substations.
• The procedures given in this document are
general in nature and provide a guideline for the
restoration team
• Depending on the availability of transmission
elements, Type & size of Generators and and
the extent of blackout, restoration team, on real
time basis, should adopt the best procedure
suited for the situation
• Based on this document Constituents have to
prepare station wise detailed switching
instructions so that the operators will have clarity
and restoration will be faster
Issues to be clarified
• AP Subsystem I
– During partial blackout of Ramagundam
extension of startup power supply through
132kv system from KTS I and II
• AP Subsystem II
– Self starting of VGTPS II
• Karnataka Subsystem III
– Capacity of Almatti generators for charging
lines up to Raichur
• Tamilnadu system Subsystem I
– Capacity of Valathur generators for charging
lines up to TTPS
Information Required
• Maximum, Minimum, Average MW and
MVAR loading of all ICT’s of 400KV and
220KV substations
• Substations feeding Traction stations with
phase details
Comments of constituents
• Ramagundam
– Since the voltage will be high during extension of Startup power
AP should provide some loads to control the voltage at
Ramagundam.
– Synchronisation of this subsystem with the other subsystem
should be done only at 400 KV Level
• AP
–
–
–
–
–
Subsystem 5 and 6 to be merged in to one subsystem
VGTPI can be started using VGTPII DG set
VGTPII can not be self started
Priorities of various alternatives suggested to be reviewed by AP
Chittoor to be included in the startup plan
Comments of constituents
• Karnataka
– Almatti can not extend startup power to Raichur
• Kaiga
– Nagjheri-Hubli-Narendra-Kaiga path as a third alternative start
up path for Kaiga
• Kerala
– No change proposed
• Tamilnadu
– Valathur-Paramakudi-TTPS can be considered as one
alternative startup path for TTPS
– List of stations with Startup facility and synchronisation facility
updated
– Madurai PCL can not be used as a startup facilitator
– Singarpet and SP Koil are directly connected and can be used
for extending Startup power to MAPS