Untitled - Ministry of Power

80
consultancy assignments with a consultancy fee
of more than Rs. 165 Crore, corresponding to
project cost of more than Rs. 2,100 Crore.
In the international arena, POWERGRID
completed survey work for a 220 kV D/C
transmission system during 2003-04, passing
through hostile terrain in Afganisthan at an
altitude of over 4000 m.
RESEARCH & DEVELOPMENT
Towards dovetailing R&D activities into practice,
it has tied up with various renowned Academic/
Research institutes like IITs (Indian Institute of
Technology), CPRI (Central Power Research
Institute), etc. and is encouraging Indian
manufactures to develop products, which would
reduce dependence on offshore supplies.
Thrust is being given on following major
technologies:
Flexible AC Transmission System (FACTS):
POWERGRID has installed fixed series
compensation as a part of FACTS on 400
kV Kanpur-Ballabgarh D/C line which has
increased its power flow capacity by 40%,
i.e., 200-250 MW by modifying the system
parameters.
Sub-station automation: For the first time
in the history of Indian Power Sector,
POWERGRID operationalised fully automated,
remote controlled 400 kV sub-station at
Bhiwadi in Rajasthan. 6 more such substations
are planned to be established.
Standardisation of Towers - POWERGRID
has standardized tower designs through inhouse
developmental efforts. This has
contributed substantially towards saving in
implementation period and also optimised
the cost of the projects.
Equipment condition monitoring and
Residual Life Assessment.
Techniques such as Dynamic testing of relays,
Dynamic Contact Resistance Measurement of
circuit breakers, Third Harmonic Leakage current
measurement on lightning arresters, Thermovision
scanning of switchyard with new generation
thermo-vision cameras, Frequency Response
Analysis (FRA) for transformers and reactors etc.
have helped in more accurate, effective and
efficient equipment maintenance planning and
replacement strategy.
Enhancing power flow capacity of
transmission lines – The studies have been
carried out for :
Increasing maximum allowable
temperature for transmission line
conductors from 75º C to 85º C/ 95ºC for
new transmission lines have been completed
and it was decided to raise the limit to 85º
C for all future transmission lines with
Aluminum Conductor Steel Reinforced
(ACSR) Conductors resulting in
enhancement of thermal rating by 30 per
cent with only 1% increase in cost.