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

State Reports (Vol.-III)
Study on `Impact of Restructuring of SEBs’
i) MERC has classified the consumers located in three regions namely urban and
industrial conglomerates, other regions and agricultural dominated regions;
ii) Each of the above regions is further classified into four groups A, B, C and D
based on the level of T&D losses and collection efficiency in the area. A refers to
the best and D refers to the worst; and
iii) The apportionment of sheddable load between the above three regions is made in
the ratio of 1:1.5:3.5, which results in following load shedding hours.
Table: Load Shedding Plan as per MERC Order
Group
Urban and
industrial conglomerates
Other regions
(Duration in hrs)
Agricultural dominated
regions
A 2.5 4.5 11
B 3 5 11.5
C 3.5 5.5 12
D 4 6 12
The customers are made aware of the load shedding plan through advertisements in
newspapers.
Number of Unannounced Load Shedding and Duration
In addition to the planned load shedding as above, there have been disruptions of a
large nature due to instances of Grid failure. These details are noted as under:
2002
Table: Details of Grid Failure
Grid failure event
No. Date Cause From To Duration
1 23 May 2002 Storm, tower collapse 8:54 17:57 9:03
2 29 May 2002 Storm, tower collapse 2:09 9:00 6:51
3 30 July 2002 Low frequency over drawl 20:11
(31 July)
19:49
4 6 Oct. 2003 Bus fault- Kalwa S/S 10:37/11:24 14:00 3:23
2003
5
6
5 Nov. 2003
7 Nov. 2003
Low voltage
Low voltage
10:24/10:33
13:03
15:00
16:00
4:36
2:57
7 6 Dec. 2003 Low Voltage 12:21/12:38 15:00 2:39
2004 8 5 Feb. 2004 Bus fault- Chandrapur S/S 14:16 17:48 3:32
2005
9 27 Feb. 2005 Fire at 400 kV Koradi S/S 19:18
(28 Feb.)
4:59
9:41
10 28 Feb. 2005
Power swing due to
occurrence at 400KV Satpura
S/S
Bus fault at 220 kV Padgha
1:56
(28 Feb.)
4:59
3:32
11 21 Sept. 2005 S/S reduced 400 and 220 kV
transmission network
9:58 13:00 3:02
10.42
4:00