thermal power development - Infraline

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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 <strong>power</strong> from new Generating Stations as well as to strengthen the <strong>power</strong> 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" 39
Central electricity authority Annual Report 2009-10 2009-10 in respect of transmission lines are given in Charts I to IV. Similarly, for the year 2009-10 in respect of transformation capacity, a programme of addition of 2500 MW at +500 kV HVDC 13860 MVA at 400 kV and 14260 at 220 kV was envisaged. Against this programme, the achievement during the year was 5225 MVA at 400 kV level and 11735 MVA at 220 kV respectively. In respect of +500 kV HVDC terminal as against the programme of 2500 MW, the achievement during 2009-10 is nil as the +500 kV HVDC line and converter stations are yet to be commissioned even though the same are ready for commissioning. Details of sub-stations completed during 2009-10 are given in Annexure-3D. Voltage-wise / Sector-wise actual achievement vis-à-vis programme for the year 2009-10 in respect of Sub-stations are given in Charts V and VI. 40 "Energy Saved is Energy Generated"
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