01-03-2013, 04:26 PM
INDIAN ELECTRICITY GRID CODE
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Introduction :
The Indian Power System is a conglomeration of a number of Utilities and
State Electricity Boards with common interests. The Indian Electricity Grid Code
(IEGC) lays down the rules, guidelines and standards to be followed by the various
agencies and participants in the system to plan, develop, maintain and operate the
power system, in the most efficient, reliable and economic manner, while facilitating
healthy competition in the generation and supply of electricity.
Objective:
The IEGC brings together a single set of technical rules, encompassing all the
Utilities connected to/or using the inter-State transmission system (ISTS) and
provides the following :-
* Documentation of the principles and procedures which define the
relationship between the various Users of the inter-State transmission
system (ISTS), as well as the Regional and State Load Despatch Centres.
* Facilitation of the operation, maintenance, development and planning of
economic and reliable Regional Grid.
* Facilitation for beneficial trading of electricity by defining a common basis
of operation of the ISTS, applicable to all the Users of the ISTS.
Scope:
(1) All partie s that connect with and/or utilize the ISTS are required to abide by
the principles and procedures defined in the IEGC in so far as they apply to that party.
(2) For the purpose of the IEGC, the Damodar Valley Corporation (DVC) will be
treated similar to an STU/SEB, in view of the fact that DVC is a vertically integrated
utility like an SEB and has its own generation, transmission and distribution in the
identified command area.
(3) For the purpose of the IEGC, the generating stations of the Bhakra Beas
Management Board (BBMB) shall be treated as intra-State generating stations, but its
transmission system shall be a part of the ISTS. This is because of the fact that only
some of the States of Northern Region have a share in BBMB, and its generating units
have to be scheduled and despatched in a very special manner (in coordination with
the irrigational requirements). The scheduling and despatch of the BBMB generation
shall continue to be the responsibility of the BBMB, with a proviso that it shall be
duly coordinated with Northern Regional Load Despatch Centre (NRLDC) and the
BBMB's beneficiaries.
Operating Code for Regional Grids :
This Chapter describes the operational philosophy to maintain efficient, secure and
reliable Grid Operation and contains the following sections.
(a) Operating Policy
(b) System security aspects
This section describes the general security aspects to be followed by generating
companies and all Regional Constituents of the Grid.
© Demand Estimation for operational purposes:
This section details the procedures to estimate the demand by the various constituents
for their systems for the day/week/month/year ahead, which shall be used for
operational planning.
(d) Demand control :
This section identifies the methodology to be adopted for demand control by each
regional constituent as a function of the frequency and deficit generation.
Non-Compliance
In case of a persistent non-compliance of any of the stipulations of the IEGC by any
Regional constituent/ISGS/CTU, the matter shall be reported by the Regional
constituent/ISGS/RLDC/CTU to the Member Secretary, REB. In case of noncompliance
by RLDCs/REBs, the matter shall be reported to the CEA. The Member
Secretary, REB or CEA, as the case may be, shall verify and take up the matter with
the defaulting agency for expeditious termination of the non-compliance. In case of
inadequate response to the efforts made by the Member Secretary, REB or CEA, as
the case may be, the non-compliance shall be reported to CERC. CERC, in turn after
due process, may order the defaulting agency for compliance, failing which, the
CERC may take appropriate action.
Charge/Payment for Reactive Energy Exchanges
The rate for charge/payment for reactive energy exchanges (according to the scheme
specified in sections 7.6.1 and 7.6.2), as approved by CERC vide Order dated
30/10/1999 shall be 4 paise/KVARh upto 31.03.2001 and shall be escalated at 05%
per year thereafter, unless otherwise revised by the CERC.
ROLE OF RLDC, REB, CTU ETC. & THEIR
ORGANISATIONAL LINKAGES
Introduction:
In the light of the Electricity Laws (Amendment) Act 1998 and the Electricity
Regulatory Commissions Act 1998, it has become necessary to define the roles of
Regional Load Despatch Centres (RLDCs), Regional Electricity Boards (REBs), the
Central Transmission Utility (CTU) etc., and their organisational linkages so as to
facilitate smooth operation of Regional Grids and National Grid at large. This chapter
defines the functions of these Organisations so far as it relates to the IEGC.
Role of RLDC(s):
RLDCs are engaged in activities of real time operation of the power
system in the regions. Their functions according to the provisions in the amended
Electricity (Supply) Act, 1948 are as follows :-
(1) The Regional Load Despatch Centre shall be the apex body to ensure
integrated operation of the power system in the concerned re gion.
(2) The Regional Load Despatch Centre may give such directions and exercise
such supervision and control as may be required for ensuring integrated grid
operations and for achieving the maximum economy and efficiency in the operation
of the power system in the region under its control.
(3) Every licensee, transmission licensee, Board, generating company, generating
stations, sub-stations and any other person connected with the operation of the power
system shall comply with the directions issued by the Load Despatch Centres under
sub-sections 55(3) and 55(4) of the amended Electricity (Supply) Act, 1948.