Transcript diversion of power from talcher_kolar 210408

Diversion of Talcher Stg II power
through ER
SRLDC VIEWS
The specific issues
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No loss of Operational flexibility
No bottling up of cheaper Talcher Power
Priority for diversion
Procedure/approval for effecting the diversion.
Transmission losses
Wheeling/transmission charges
Priority of diversion
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While planning the evacuation transmission network for
the Talcher Stage-II generating station, the backup/alternate network in the absence of availability of
Talcher-Kolar pole(s) has not been envisaged.
As per the on-going practice, in the event of any
contingency of outage of Talcher-Kolar pole, the Talcher
Stage-II power is being diverted through ER and ER/WR
subject to the availability of the corridor in the other
Region.
Any priority for diversion of this power through other
Regions is not possible and the existing practice of
permitting diversion subject to availability of corridor
can be continued
Procedure
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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
However, after the diversion in case the diversion period
is more than the specific period as stated earlier (say 3
days continuous), then the agreed transmission charges
on post-facto basis can be worked out and adjusted in
the monthly transmission bills.
Transmission losses
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The notional regional transmission losses can be applied,
as is being done
Wheeling
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The diversion of Talcher-II power through ER/WR is being
carried out for reducing the transmission losses and/or
improving the overall system security as well as during
the outage of Talcher-Kolar poles subject to the
availability of the corridor.
Transmission charges
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Presently no transmission charges are being levied for
such diversion and for such occasional diversions, the
same practice can be continued.
Occasional wheeling/injection of power through/to SR
grid in the event of contingencies in other Regions is
also permitted by SR without levying any transmission
charges
Same is the case with ER/WR
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 3 days or
more at a stretch) when the Talcher-Kolar path is
physically not available, some transmission charges can
be levied.
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.
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.
7.5.3
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 inter-regional 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
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“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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