Tariff Regulations
Centre
The CERC has issued the Terms and Conditions of Tariff regulations,2019 which has come into force from 1 April 2019 and will remain valid till 31st March 2024 i.e., for a period of five years. The primary purpose of these regulations is to determine the tariff of transmission projects having a COD on or after 1st April 2019.
Indian Electricity Grid Code, 2010
Resolution By
CERC
Notification No. and date
L-1/18/2010-CERC dated 28 April 2010
Objectives
The IEGC brings together a single set of technical and commercial 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 ISTS, NLDC, RLDCs & SLDCs
• Facilitation of the optimal operation of the grid, facilitation of coordinated and optimal maintenance planning of generation and transmission facilities in the grid and facilitation of development and planning of economic and reliable National / Regional Grid
• Facilitation for functioning of power markets and ancillary services by defining a common basis of operation of the ISTS, applicable to all the Users of the ISTS.
• Facilitation of the development of renewable energy sources by specifying the technical and commercial aspects for integration of these resources into the grid.
[Part - 1: Clause 1.2]
• Documentation of the principles and procedures which define the relationship between the various Users of the ISTS, NLDC, RLDCs & SLDCs
• Facilitation of the optimal operation of the grid, facilitation of coordinated and optimal maintenance planning of generation and transmission facilities in the grid and facilitation of development and planning of economic and reliable National / Regional Grid
• Facilitation for functioning of power markets and ancillary services by defining a common basis of operation of the ISTS, applicable to all the Users of the ISTS.
• Facilitation of the development of renewable energy sources by specifying the technical and commercial aspects for integration of these resources into the grid.
[Part - 1: Clause 1.2]
Regulations called as
Central Electricity Regulatory Commission (Indian Electricity Grid Code) Regulations, 2010.
[Clause No. 1.1]
[Clause No. 1.1]
Effective from
These Regulations shall come into force from 3.5.2010.
[Clause No. 1.2]
[Clause No. 1.2]
Planning Code for Inter-State Transmission
The Planning Code specifies the philosophy and procedures to be applied in planning of National Grid, Regional Grids and Inter Regional links.
[Clause No. 3.1 (viii)]
[Clause No. 3.1 (viii)]
Connection Code/ Grid connectivity- Introduction
CTU shall discharge all functions of planning and co-ordination relating to inter-State transmission system.
STU shall discharge all functions of planning and co-ordination relating to intra-State transmission system.
CTU & STU shall inter-alia provide non-discriminatory open access to its transmission system for use by any licensee, generating company, or any consumer on payment of applicable charges (i.e., transmission charges, surcharge etc)
CEA shall inter-alia prepare National Eletricity Plan in accordance with National Electricity Policy and notify such plan once in 5 years. CEA may revise or review National Electricity Plan in accordance with National Electricity Policy.
[Clause No. 3.1]
STU shall discharge all functions of planning and co-ordination relating to intra-State transmission system.
CTU & STU shall inter-alia provide non-discriminatory open access to its transmission system for use by any licensee, generating company, or any consumer on payment of applicable charges (i.e., transmission charges, surcharge etc)
CEA shall inter-alia prepare National Eletricity Plan in accordance with National Electricity Policy and notify such plan once in 5 years. CEA may revise or review National Electricity Plan in accordance with National Electricity Policy.
[Clause No. 3.1]
Connection Code/ Grid connectivity- Objective
The objectives of Planning Code are as follows:
(a) To specify the principles, procedures and criteria which shall be used in the planning and development of the ISTS and inter regional links.
(b) To promote co-ordination amongst all Users,STU,/SLDC and CTU/RLDC ,NLDC, RPC and CEA in any proposed development of the ISTS.
(c) To provide methodology and information exchange amongst Users,STU/SLDC and CTU/RLDC,RPC , NLDC and CEA in the planning and development of the ISTS.
[Clause No. 3.2]
(a) To specify the principles, procedures and criteria which shall be used in the planning and development of the ISTS and inter regional links.
(b) To promote co-ordination amongst all Users,STU,/SLDC and CTU/RLDC ,NLDC, RPC and CEA in any proposed development of the ISTS.
(c) To provide methodology and information exchange amongst Users,STU/SLDC and CTU/RLDC,RPC , NLDC and CEA in the planning and development of the ISTS.
[Clause No. 3.2]
Connection Code/ Grid connectivity- Scope
Applies to CTU, other Transmission Licensees, ISGS connected to and/or using and involved in developing the ISTS.
Applies to Generating companies, IPPs, SEBs/STUs and / licensees, regarding generation and/or transmission of energy to/from the ISTS.
[Clause No. 3.3]
Applies to Generating companies, IPPs, SEBs/STUs and / licensees, regarding generation and/or transmission of energy to/from the ISTS.
[Clause No. 3.3]
Connection Code/ Grid Connectivity- Planning Philosophy
1. CEA would formulate perspective transmission plan for ISTS & InSTS systems.These perspective transmission plans would be continuously
updated considering revisions in load projections and generation scenarios w.r.t. seasonal and ToD variations. In formulating perspective transmission plan the transmission requirement for evacuating power from RE sources & Open Access shall also be taken into account.
2. The CTU shall carry out planning process from time to time as per the requirement which shall fit in with the perspective plan developed by CEA. While planning schemes, the following shall be considered by CTU:
i) Perspective plan formulated by CEA.
ii) Electric Power Survey of India published by the CEA.
iii) Transmission Planning Criteria and guidelines issued by the CEA
iv) Operational feedback from RPCs
v) Operational feedback from NLDC/RLDC/SLDC
vi) Central Electricity Regulatory Commission ( Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations ,2009.
vii) Renewable capacity addition plan issued by Ministry of New and Renewable Energy Sources ( MNRES), GoI
3. CTU shall plan system strengthening schemes time to time.
4. All STUs and Users will supply the desired planning data from time to time to the CTU to enable to formulate and finalize its plan.
5. Based on Plans prepared by the CTU, STU shall have to plan their systems to further evacuate power from the ISTS and to optimize the use of integrated transmission network.
6. In case Long Term Access Applications require any strengthening in the intra-State transmission system to absorb/evacuate power beyond ISTS, the applicant shall coordinate with the concerned STU. STU shall augment the intra-state transmission system in a reasonable time to facilitate the interchange of such power.
7. The ISTS and associated InSTS are complementary and inter-dependent and planning of one affects the other's planning and performance. Therefore, the associated intra-State transmission system shall also be discussed and reviewed before implementation during the discussion for finalizing ISTS proposal.
[Clause 3.4]
updated considering revisions in load projections and generation scenarios w.r.t. seasonal and ToD variations. In formulating perspective transmission plan the transmission requirement for evacuating power from RE sources & Open Access shall also be taken into account.
2. The CTU shall carry out planning process from time to time as per the requirement which shall fit in with the perspective plan developed by CEA. While planning schemes, the following shall be considered by CTU:
i) Perspective plan formulated by CEA.
ii) Electric Power Survey of India published by the CEA.
iii) Transmission Planning Criteria and guidelines issued by the CEA
iv) Operational feedback from RPCs
v) Operational feedback from NLDC/RLDC/SLDC
vi) Central Electricity Regulatory Commission ( Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations ,2009.
vii) Renewable capacity addition plan issued by Ministry of New and Renewable Energy Sources ( MNRES), GoI
3. CTU shall plan system strengthening schemes time to time.
4. All STUs and Users will supply the desired planning data from time to time to the CTU to enable to formulate and finalize its plan.
5. Based on Plans prepared by the CTU, STU shall have to plan their systems to further evacuate power from the ISTS and to optimize the use of integrated transmission network.
6. In case Long Term Access Applications require any strengthening in the intra-State transmission system to absorb/evacuate power beyond ISTS, the applicant shall coordinate with the concerned STU. STU shall augment the intra-state transmission system in a reasonable time to facilitate the interchange of such power.
7. The ISTS and associated InSTS are complementary and inter-dependent and planning of one affects the other's planning and performance. Therefore, the associated intra-State transmission system shall also be discussed and reviewed before implementation during the discussion for finalizing ISTS proposal.
[Clause 3.4]
Connection Code/ Grid Connectivity- Planning Criterion
1. As a general rule, the ISTS shall be capable of withstanding and be secured against the contingency outages.
2. The planning study would assume that all the Generating Units operate within their reactive capability curves and the network voltage profile are also maintained within voltage limits specified.
3. The ISTS shall be capable of withstanding the loss of most severe single system infeed without loss of stability.
4. In all substations (132 kV and above), at least two transformers shall be provided.
5. CTU shall carry out planning studies for Reactive Power compensation of ISTS including reactive power compensation requirement at the generator’s /bulk consumer’s switchyard and for connectivity of new generator/ bulk consumer to the ISTS.
6. Suitable System Protection Schemes may be planned by NLDC/RLDC in consultation with CEA, CTU, RPC and the Regional Entities, either for enhancing transfer capability or to take care of contingencies.
[Clause 3.5]
2. The planning study would assume that all the Generating Units operate within their reactive capability curves and the network voltage profile are also maintained within voltage limits specified.
3. The ISTS shall be capable of withstanding the loss of most severe single system infeed without loss of stability.
4. In all substations (132 kV and above), at least two transformers shall be provided.
5. CTU shall carry out planning studies for Reactive Power compensation of ISTS including reactive power compensation requirement at the generator’s /bulk consumer’s switchyard and for connectivity of new generator/ bulk consumer to the ISTS.
6. Suitable System Protection Schemes may be planned by NLDC/RLDC in consultation with CEA, CTU, RPC and the Regional Entities, either for enhancing transfer capability or to take care of contingencies.
[Clause 3.5]
Connection Code/ Grid Connectivity- Planning Data
Under Planning Code, the Regional entities/STUs/State Generating Companies/IPPs/licensees are to supply data in accordance with the detailed procedures mentioned in the CERC (Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations ,2009.
[Clause 3.6]
[Clause 3.6]
Connection Code/ Grid Connectivity- Implementation of Transmission Plan
'The actual program of implementation of transmission lines, Interconnecting Transformers, reactors/capacitors and other transmission elements will be in accordance with the detailed procedures mentioned in the Central Electricity Regulatory Commission ( Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations ,2009.
[Clause 3.7]
[Clause 3.7]
Connection Code- Introduction
CTU, STU and Users connected to, or seeking connection to ISTS shall comply with CEA (Technical Standards for connectivity to the Grid) Regulations, 2007 which specifies the minimum technical and design criteria and CERC (Grant of Connectivity, Long-term Access and Medium term Open Access in inter-state Transmission and related matters) Regulations,2009.
[Clause 4.1]
[Clause 4.1]
Connection Code- Objective
a) To ensure the safe operation, integrity and reliability of the grid.
b) That the basic rules for connectivity are complied with in order to treat all users in a non-discriminatory manner.
c) Any new or modified connections, when established, shall neither suffer unacceptable effects due to its connectivity to the ISTS nor impose unacceptable effects on the system of any other connected User or STU.
d) Any person seeking a new connection to the grid is required to be aware, in advance, of the procedure for connectivity to the ISTS and also the standards and conditions his system has to meet for being integrated into the grid.
[Clause 4.2]
b) That the basic rules for connectivity are complied with in order to treat all users in a non-discriminatory manner.
c) Any new or modified connections, when established, shall neither suffer unacceptable effects due to its connectivity to the ISTS nor impose unacceptable effects on the system of any other connected User or STU.
d) Any person seeking a new connection to the grid is required to be aware, in advance, of the procedure for connectivity to the ISTS and also the standards and conditions his system has to meet for being integrated into the grid.
[Clause 4.2]
Connection Code- Scope
The Connection code applies to CTU,STU and all Users connected to or seeking connection to the ISTS, The Connection code does not apply to Generating Units, transmission/distribution systems embedded in the intra-State systems, and not connected to the ISTS.
[Clause 4.3]
[Clause 4.3]
Connection Code/ Grid connectivity- Procedure for connection
A User seeking to establish new or modified arrangement of connection to or for use of ISTS, shall submit an application on standard format to CTU in accordance with CERC (Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations, 2009
[Clause 4.4]
[Clause 4.4]
Connection Code/ Grid connectivity- Connection Agreement
A Connection agreement shall be signed by the applicant in accordance with the CERC (Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations,2009.
[Clause 4.5]
[Clause 4.5]
Connection Code/ Grid connectivity- Important technical requirements for connectivity to the grid
1. Reactive Power Compensation shall be provided by STUs, and Users connected to ISTS as far as possible in the low voltage systems close to the load points thereby avoiding the need for exchange of Reactive Power to/from ISTS and to maintain ISTS voltage within the specified range.
2. Data & Communication Facilities: Reliable and efficient speech and data communication systems shall be provided to facilitate necessary communication and data exchange, and supervision/control of the grid by the RLDC, under normal and abnormal conditions. All Users, STUs and CTU shall provide Systems to telemeter power system parameter such as flow, voltage and status of switches/ transformer taps etc. in line with interface requirements and other guideline made available by RLDC.
3. System Recording Instruments: Recording instruments such as Data Acquisition System/Disturbance Recorder/Event Logging Facilities/Fault Locator (including time synchronization equipment) shall be provided and shall always be kept in working condition in the ISTS for recording of dynamic performance of the system. All Users, STUs and CTU shall provide all the requisite recording instruments and shall always keep them in working condition.
4. Responsibilities for safety: CTU/STU and the concerned Users shall be responsible for safety in accordance with CEA (Technical Standards for connectivity to the Grid) Regulations, 2007 ,CERC (Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations,2009 and CEA (Safety Requirements for construction, operation and maintenance of electrical and electric lines) Regulations, 2008.
5. Cyber Security: All utilities shall have a cyber security framework to identify the critical cyber assets and protect them so as to support reliable operation of the grid.
[Clause 4.6]
2. Data & Communication Facilities: Reliable and efficient speech and data communication systems shall be provided to facilitate necessary communication and data exchange, and supervision/control of the grid by the RLDC, under normal and abnormal conditions. All Users, STUs and CTU shall provide Systems to telemeter power system parameter such as flow, voltage and status of switches/ transformer taps etc. in line with interface requirements and other guideline made available by RLDC.
3. System Recording Instruments: Recording instruments such as Data Acquisition System/Disturbance Recorder/Event Logging Facilities/Fault Locator (including time synchronization equipment) shall be provided and shall always be kept in working condition in the ISTS for recording of dynamic performance of the system. All Users, STUs and CTU shall provide all the requisite recording instruments and shall always keep them in working condition.
4. Responsibilities for safety: CTU/STU and the concerned Users shall be responsible for safety in accordance with CEA (Technical Standards for connectivity to the Grid) Regulations, 2007 ,CERC (Grant of Connectivity, Long-term Access and Medium-term Open Access in inter-state Transmission and related matters) Regulations,2009 and CEA (Safety Requirements for construction, operation and maintenance of electrical and electric lines) Regulations, 2008.
5. Cyber Security: All utilities shall have a cyber security framework to identify the critical cyber assets and protect them so as to support reliable operation of the grid.
[Clause 4.6]
Connection Code- International connections to ISTS
The procedure for international Connection to ISTS and the execution of agreement for the same shall be determined by CTU in consultation with CEA and Ministry of Power (MOP).
[Clause 4.7]
[Clause 4.7]
Connection Code/ Grid connectivity- Schedule of assets of Regional Grid
CTU and other transmission licensees granted license by CERC shall submit annually to CERC by 30th September each year a schedule of transmission assets, which constitute the Regional Grid as on 31st March of that year indicating ownership on which RLDC has operational control and responsibility.
[Clause 4.8]
[Clause 4.8]
Indian Electricity Grid Code Regulations, 2010 (1st Amendment)
Resolution By
CERC
Notification No. and date
L-1/18/2010-CERC dated 5 March 2012
Regulations called as
Central Electricity Regulatory Commission (Indian Electricity Grid Code) (First Amendment) Regulations, 2012.
[Clause No. 1.1]
[Clause No. 1.1]
Effective from
These Regulations shall come into force from 02.04.2012
[Clause No. 1.2]
[Clause No. 1.2]
Connection Code/ Grid Connectivity- Planning Philosophy
In case of associated transmission system where all PPAs have not been signed, and where agreement could not be reached in respect of system strengthening schemes, the CTU may approach the Commission for the
regulatory approval in accordance with CERC (Grant of Regulatory Approval for execution of Inter-State Transmission Scheme to Central Transmission Utility) Regulations, 2010.
regulatory approval in accordance with CERC (Grant of Regulatory Approval for execution of Inter-State Transmission Scheme to Central Transmission Utility) Regulations, 2010.