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

Haryana
Year
Total no. of
lines (11 kV
& 33 kV)
Table: Interruption Indices for DHBVNL 4
Total No.
of interruptions
Annual
interruption/line
2.33
Duration of
interruption
(Hrs)
Duration of
interruption
(annual) hrs/line
Reliability
(%)
2000-01 1,287 96,187 74.73 21,358 17.00 99.805
2001-02 1,326 97,808 73.76 64,138 48.36 99.450
2002-03 1,403 1,00,034 71.00 54,777 39.04 99.554
2003-04 1,594 1,16,542 73.00 61,693 38.70 99.558
2004-05 1,775 1,01,005 57.00 54,648 30.78 99.648
(Source: DISCOMs)
Note: These interruptions are due to faults only which does not includes interruption due to system
constraints/scheduled cuts on lines. (Interruptions in UHBVNL were 1,58,699 in 2004-05 against
1,56,214 in 2000-01.)
Failure of Distribution Transformers
Performance of DTs indicates the level of quality of supply of electricity to the
consumers. The DTs failure rate has been consistently reduced from 33 per cent in
1997-98 to 15.68 per cent in 2002-03. However, there was a reversal in trend in 2003-
04 when the DTs failure rate increased to 16.15 per cent and further moved up to 16.3
per cent in 2004-05. The detailed yearly transformer failure rate for the DISCOMs, as
also for the State as a whole, are depicted below:
Table: Failure Rate of Distribution Transformers
Year
Failure Rate of Distribution Transformers (%)
Total Haryana UHBVNL DHBVNL
1997-98 33.00 - -
1998-99 27.80 - -
1999-2000 25.73 27.8 22.9
2000-01 20.19 18.7 22.3
2001-02 16.56 15.6 17.9
2002-03 15.68 13.5 18.7
2003-04 16.15 14.3 18.6
2004-05 16.30 13.9 19.4
(Source: DISCOMs)
4 Data for UHBVNL was not available.