Petition No. 219/2009. Case: Northern Regional Load Despatch Centre, New Delhi Vs Uttar Pradesh Power Corporation Ltd., Lucknow and Ors.. Central Electricity Regulatory Commission
| Case Number | Petition No. 219/2009 |
| Judges | Dr. Pramod Deo, Chairperson, Shri S. Jayaraman, Member and Shri V.S. Verma, Member |
| Issue | Electricity Act, 2003 - Sections 29, 29(2), 29(3), 31(2) |
| Judgement Date | Thursday September 20, 2012 |
| Court | Central Electricity Regulatory Commission |
Order:
Through the petition, the petitioner Northern Regional Load Despatch Centre has made the following prayers:
(a) Initiate suitable actions against respondent UPPCL for violation of clause 5.4.2(a), 6.4.7 of the Indian Electricity Grid Code (hereinafter "the Grid Code") and non-compliance of NRLDC's directions during the months of August and September 2009; and
(b) Direct all the main respondents to comply with clause 5.4.2, 6.4.7 and 6.4.8 of Indian Electricity Grid Code and curb their over-drawals whenever frequency is below 49.2 Hz so that the NEW grid is secure during the coming winter months.
Briefly, the facts of the case are that Northern Regional Load despatch Centre (NRLDC) had submitted that entire North-East-West electricity grid was operating in a highly insecure manner during August and September, 2009 during which period the frequency was below 49.2 Hz for substantial periods of time as indicated below:
< xml:namespace prefix = st1 />
Frequency Range August 2009
Sep 2009
< 49.2 Hz
25.5%
16.7%
< 49.5 Hz
61.0%
40.2%
According to the petitioner, the primary reason for the sustained low frequency was over-drawals by the constituents. The over-drawal position in respect of Northern region constituents for the months of August and September 2009 (up to 20th Sep 2009) as computed from Special Energy Meter (SEM) data is given below:
State/UT
MWhr over-drawal below 49.2 Hz
No. of time blocks below 49.2 Hz when the State was over-drawing
Average over-drawal below 49.2 Hz
August 2009
September 2009
August 2009
September 2009
August 2009
September 2009
UP
158057
22593
720
72
878
1255
Haryana
18544
2515
509
59
146
171
Delhi 21219
544
500
23
170
95
Uttarakhand
15963
995
588
38
109
105
Rajasthan
10424
797
430
31
97
103
HP
5721
624
463
38
49
66
UT
Chandigarh 6671
425
662
56
40
30
J & K
4491
2291
289
73
62
126
Punjab 3226
1025
136
30
95
137
Northern Region
157495
22472
714
72
882
1248
* No. of 15-minute time blocks during August 2009, when frequency was below 49.2 Hz. = 720
** No. of 15-minute time blocks, in September 2009 (up to 20th) when frequency was below 49.2 Hz. = 76
The petitioner submitted that in line with the provisions of Grid Code, it issued different types of messages to the defaulting constituents in real-time with regard to overdrawal from the grid during low frequency period. Briefly, the scheme for issue of different types of message is as given below: The details of the messages are as given below:
Message-Type
Subject Description
Caution message in line with para6.4.7 of the Grid Code (Message type A)
Intimation of Low frequency operation below 49.5 Hz and request to restrict the drawal within schedule
Violation of the Grid Code para5.4.2 (a) and 6.4.7
Intimation regarding violation of para5.4.2 (a) and para6.4.7 of the Grid Code and directions under para5.4.2 (b) of the Grid
(Message type B)
Code and 29(1) of Electricity Act, 2003 (the Act) 2003 for immediate action for restriction of overdrawal in order to avert threat to system security
Violation of para5.4.2 (b) of the Grid Code and Sections 29(2) and 29(3) of the Act (Message type C)
Intimation of violation of para5.4.2(b) of the Grid Code and non-compliance of directions under Section 29 of the Act and request for immediate action for curtailing the over-drawal, in the interest of grid safety and security
The petitioner has submitted the following details of the messages which were issued to the constituents of the region during the relevant period:
State / UT
Caution Message (type A)
Violation Message (type B)
Violation Message (type C)
August 2009
September 2009
August 2009
September 2009
August 2009
September 2009
Uttar Pradesh
68
55
79
46
34
15
Delhi 32
15
35
6
9
0
Uttarakhand
30
15
17
5
3
0
Haryana
43
25
34
9
3
0
J&K
15
33
7
21
1
5
Punjab 32
43
20
26
1
3
HP
7
5
1
2
0
0
Chandigarh 0
5
0
0
0
0
Rajasthan
18
7
14
6
0
0
The petitioner has also placed on records the following specific information with regard to Uttar Pradesh Power Corporation Limited (UPPCL), respondent No. 1:
(a) Apart from the above messages issued in real time, messages had been issued at the level of General Manager, NRLDC...
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