thermal power development - Infraline

Central electricity authority Annual Report 2009-10
various Sub-station equipment of 220 kV and
above voltage class, investigation in respect
of the following utilities was carried out and
recommendation sent to concerned utility:
a) Failure of two 400/220/33 kV, 315 MVA
transformers in Mandola Substation of
PGCIL.
b) Failure of 220/66-33 kV, 100 MVA
transformer in Park Street Substation of
Delhi Transco Ltd.
c) Failure of 220/66-33 kV, 100 MVA
transformer in Baddi Substation of HPSEB.
3.12 Technology Improvement
Programme in Power System
After completion of training at Chicago,
USA, following Pilot Project was taken up with
SEBs in following area:
i) Residual Life Assessment (RLA) of
Substation Equipment
Construction of any transmission system
requires a huge amount of investment and
the cost of EHV Substation equipment
contributes a major portion of cost of the
transmission system. As the transmission
lines and substations are growing older,
there is a need of proper condition
monitoring of substation equipment to
assess the residual life of various substation
equipment and ensure proper maintenance
of the equipment. A pilot project on
“Residual Life Assessment of Substation
Equipment” has been taken up with the
MSEB(now MSETCL).
Following diagnostic tools have been
procured and installed in 220/33 kV
Mudsighi, 400/220kV Kolhapur-II
Substation of MSETCL at Kolhapur:
i) Digital Earth Tester
ii) Transformer Winding Resistance
Meter
iii) Contact Resistance Meter
iv) Automatic relay test kit (3 phase)
v) Circuit Breaker Operation Analyzer
vi) Leakage current monitor for lightning
arrester
vii) Automatic Capacitance & Tan Delta
Measuring Equipment.
In addition to above, the following
equipment are being utilized in GETCO,
Ahmedabad. The following diagnostic tools
which were earlier used in MSETCL are at
present being utilized by GETCO, Ahmedabad:
1) On-line Dissolved gas Analyzer for
Transformer
2) Partial Discharge Measuring Equipment for
Transformer
3) Frequency Response Analyzer for
Transformer
3.13 Construction Monitoring of
Transmission Projects
The monitoring of construction of
transmission lines and sub-stations at voltage
levels of 220 kV and above is being carried out
with a view to achieve completion of transmission
system both to ensure evacuation of power from
new Generating Stations as well as to strengthen
the power system network in the country.
For the year 2009-10, programme for
stringing of 280 Ckm at +500 kV HVDC,
632 Ckm of 765 kV, 9548 Ckm of 400 kV
and 7103 Ckm of 220 kV transmission lines
was envisaged. Against this programme, the
stringing of transmission lines actually achieved
during the year 2009-10 was 280 Ckm of +500
kV HVDC, 445 Ckm of 765 kV, 7857 Ckm of
400 kV and 5139 Ckm of 220 kV lines. Details
of transmission lines completed during the year
2009-10 are given in Annexure-3C.
Voltage-wise / Sector-wise actual
achievement vis-à-vis programme for the year
"CEA-Helping the Transformation of Indian Power Sector"
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