Report of Indian Institute of Public Administration ... - Ministry of Power

State Reports (Vol.-III)
Study on `Impact of Restructuring of SEBs’
TRANSMISSION
HVPNL is responsible for the transmission and bulk supply of electricity to the
DISCOMs. In the single buyer model (SBM), the transmission company was
entrusted with the bulk supply business and accordingly it was provided the license by
the Commission in 1999. However, under the EA, 2003 trading of power by the
transmission company is not permissible. The HVPNL is primarily responsible for:
(a) Planning, designing, erection and maintenance of transmission lines, sub-stations
and communication facilities and appurtenant works;
(b) To maintain an integrated and efficient power transmission system network; and
(c) Wheeling of power, purchase and sale of power in accordance with the policies
and guidelines laid down from time to time.
TRANSMISSION NETWORK
HVPNL has a transmission network a total of 5,596 ckt km primarily at the 220 kV,
132 kV and 66 kV voltage levels. Prior to restructuring, the transmission system
comprised primarily of 66 kV and 132 kV transmission lines and sub-stations.
HVPNL has added a significant number of sub-stations and the associated lines to
augment and expand the transmission network within the State. The transmission
system augmentation is being planned over 66 kV, 132 kV and 220 kV for more
efficient operations and to increase the voltage level for transmission, which, in turn,
reduces the losses in the network. Details regarding the number of sub-stations at 220
kV, 132 kV and 66 kV are given below:
Table: New Sub-stations Installed by HVPNL
Voltage
level (kV)
No. of S/S#
as on
31.03.1998
No. of substations added during
1998-99
1999-
2000
2000-01 2001-02 2002-03 2003-04 2004-05 2005-06* Total
220 24 0 2 0 0 3 4 3 0 36
132 72 2 1 2 1 5 15 13 1 112
66 68 1 3 0 6 3 4 7 4 96
Total 164 3 6 2 7 11 23 23 5 244
# S/S: Sub-stations
* Till December 2005
Since the beginning of the restructuring in the State (1998-99), the following increase
in the number of substations has been noticed:
• 220 kV sub-stations by 50 per cent;
• 132 kV sub-stations by 56 per cent;
• 66 kV sub-stations by 41 per cent.
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