Transcript Priority of diversion

Diversion of
Talcher Stage II power
through ER
Diversion of Talcher Stage II power through ER
PRESENT PRACTICE
The diversion of Talcher-II power through
ER/WR is being carried out



for reducing the transmission losses.
for improving the voltage profile, overall
system security.
during the outage of Talcher-Kolar poles.
-The above is subject to the availability of the corridor in other Regions.
Diversion of Talcher Stage II power through ER

On this issue the following points are of
importance :

Priority for diversion
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Procedure/approval for effecting the diversion.
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Transmission losses

Wheeling/transmission charges
Issues

Priority of diversion
In the event of any contingency (outage of Talcher-Kolar
pole),the Talcher Stage II power is being divrted through
ER and ER/WR subject to the availability of corridor in
other Regions. This practice can be continued.
Issues

cond….
Procedure for diversion
In order to avoid throttling of the of cheap pit head
station power, evacuation through the alternate routes,
via ER and if required through WR, in real time operation
should take place, as is being done at present i.e., just by
consultation and exchange of codes between the RLDCs
Issues

cond….
Transmission losses
The notional regional transmission losses can be applied,
as is being done in case of diversion of power through
ER system. Similar philosophy needs to be followed in
case of diversion through WR also.
Issues
cond….
Transmission charges


Presently no transmission charges are being levied for such
diversion of power.
However, in case of diversion of Talcher-II power is for a prolonged
period due to a planned shutdown/forced outage for a long duration
(say for a period of -- days or more at a stretch) when the TalcherKolar path is physically not available, transmission charges as
mutually agreeable can be levied.
Issues

cond….
While addressing all the above issues the
following should be kept in mind


No loss of Operational flexibility
No bottling up of cheaper Talcher stage
II Power
Relevant IEGC Clauses
7.4.5
The base MW level for Talcher-Kolar HVDC
link
at Talcher end shall be separately
advised by SRLDC
to
Talcher
HVDC
terminal. It need not be
equal
to
the
Talcher-II dispatch schedule, since
power
can flow to SR via other routes as
well,i.e.,Gazuwaka HVDC and Chandrapur
HVDC .(The HVDC settings are to be
optimized by SRLDC)
7.5.2
The SRLDC shall schedule the interchanges
of SR with all other regions, and also advise
the power settings to Talcher, Chandrapur
and Gazuwaka HVDC stations.
Relevant IEGC Clauses
7.5.3
While specifying the above interchange
schedules and HVDC settings, NRLDC and
SRLDC shall ascertain (in coordination with
ERLDC/WRLDC)
that
no
transmission
overloading would be caused on either side of
the HVDC links.
7.5.5
While specifying the settings of HVDC links
under their jurisdiction, NRLDC and SRLDC
shall also see whether a diversion of some
powerfrom one link to another would reduce
transmission
losses
and/ortransmission
loading (thereby permitting more interregional power transfer) and improve the
overall system security/voltage profile.
Hon’ble Commission’s order dated
19.1.2005 in regard to petition
No.95/2004 under para 7

“7. We have considered the matter. We direct that the
transmission charges, provisional or otherwise shall be
shared between the constituents of Eastern and Western
Regions in equal proportion, that is, in the ratio of 50:50.
However, in the event of beneficiaries of Southern
Region using the above inter-regional line they would be
liable to pay wheeling charges according to use and the
balance transmission charges for this inter-regional line
shall be shared by the beneficiaries of the Eastern and
Western Regions on 50:50 basis as per notification dated
26.3.2001 of the Commission.”
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