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

Haryana
Table: Availability of Transmission Sub-stations of HVPNL (%)
Name of Substation
220 kV Narnaul
220 kV Hisar
220 kV Rewari
132 kV S/S Dadri-II
132 kV Hansi (Hisar end)
132 kV Hansi (Bhiwani end)
132 kV Karnal
66 kV Daruhera
66 kV Gobindpuri (Y/Nagar)
Planned Maintenance
2001
94.94
92.62
96.64
96.43
96.66
99.39
98.90
72.76
78.72
2.21
2002
100.00
98.00
91.81
99.85
100.00
99.40
100.00
88.98
98.80
2003
100.00
84.00
100.00
100.00
100.00
99.55
99.40
87.35
100.00
2004
100.00
95.00
100.00
100.00
100.00
100.00
99.70
83.00
100.00
2005
100.00
100.00
100.00
100.00
100.00
100.00
100.00
77.83
100.00
HVPNL has saved outage hours through planned maintenance schedule and through
hot-line maintenance to improve the reliability of power. The following table indicates
significant saving in outages to the extent of about 466 hours on 220 kV lines on
account of hotline maintenance carried out by the utility staff. Time period of around
9,000 hours of planned maintenance was carried out which enhanced the reliability of
power in the State.
Table: Planned Maintenance and Savings due to Hotline Maintenance
Activity 1998-99 1999-00 2000-01 2001-02 2002-03 2003-04 2004-05
No. of hours of outage saved due to hotline maintenance
· 220 KV 117 220.3 114 197 79 69 466
· 132 KV 257 255.3 94 335 151 86 197
· 66 KV 752 241.3 210 194 330 521 532
Total
Average hours taken for planned maintenance
1126 716.9 418 726 560 676 1195
Total time of outage (Hours) 4760 15574 4961 6015 4999 10209 9196
The average availability of various sub-stations depicts an overall improvement as
shown in the chart below. The average interruption time owing to faults in the
transmission lines has reduced significantly by about 50 per cent i.e., from 3,397
hours in 2002-03 to about 1,582 hours in 2004-05.