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 NumberPetition No. 219/2009
JudgesDr. Pramod Deo, Chairperson, Shri S. Jayaraman, Member and Shri V.S. Verma, Member
IssueElectricity Act, 2003 - Sections 29, 29(2), 29(3), 31(2)
Judgement DateSeptember 20, 2012
CourtCentral Electricity Regulatory Commission

Order:

  1. 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%

  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

  3. 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

  4. 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

  5. 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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