Tariff Regulations
Assam
The Assam Electricity Regulatory Commission has issued the Terms and conditions for determination of Multi Year Tariff regulations dated 28th June 2018. The regulation is effective for three financial years from April 1, 2019 to March 31, 2022. The primary purpose of these regulations is to determine the tariff in all cases covered under these Regulations from 1st April, 2019 onwards.
Assam Electricity Grid Code, 2018
Resolution By
AERC
Notification No. and date
AERC.642/2017/244 dated 05.09.2018
Objectives
1. The State Grid Code brings together a single set of technical and commercial rules, encompassing all the Utilities connected to/or using the intra-State transmission system (IaSTS).
2. To provide documentation of the principles and procedures which define the relationship between the various users of IaSTS, as well as the SLDC, concerned RLDC & NLDC.
3. To facilitate the operation, maintenance, development and planning of economic and reliable State Grid.
4. To facilitatethe development of Renewable Energy sources by specifying the technical and commercial aspects for integration of these sources into the Grid.
[clause 1.2]
2. To provide documentation of the principles and procedures which define the relationship between the various users of IaSTS, as well as the SLDC, concerned RLDC & NLDC.
3. To facilitate the operation, maintenance, development and planning of economic and reliable State Grid.
4. To facilitatethe development of Renewable Energy sources by specifying the technical and commercial aspects for integration of these sources into the Grid.
[clause 1.2]
Regulations called as
Assam Electricity Regulatory Commission (Electricity Grid Code) Regulations, 2018. Also, referred as State Grid Code or SGC
Planning Code for Intra-state Transmission- Introduction
1. The State Transmission Utilities (STUs) shall discharge all functions of planning and coordination relating to intra-State transmission system with Central Transmission Utility, State Governments, Generating Companies, Regional Power Committees, Central Electricity Authority , licensees and any other person notified by the State Government in this behalf.
2. It specifies the method for data submissions by Users to STU for the planning and development of the intra State transmission system.
3.It specifies the procedure to be applied by STU in the planning and development of the intra State Transmission System.
[clause 4.1]
2. It specifies the method for data submissions by Users to STU for the planning and development of the intra State transmission system.
3.It specifies the procedure to be applied by STU in the planning and development of the intra State Transmission System.
[clause 4.1]
Planning Code for Intra-state Transmission- Objective
1. To enable STU to produce a plan in consultation with Users, to provide an efficient, coordinated, secure and economical Intra State transmission system.
2. To define the procedure for the exchange of information between STU and a User, which may have an impact on the performance of the intra State Transmission System.
3. To provide details of the information which STU shall make available to Users in order to facilitate the identification and evaluation of opportunities for use of or connection to intra State Transmission System
4. To specify planning and design standards, which will be applied by STU in planning and development of the powersystem.
[clause 4.2]
2. To define the procedure for the exchange of information between STU and a User, which may have an impact on the performance of the intra State Transmission System.
3. To provide details of the information which STU shall make available to Users in order to facilitate the identification and evaluation of opportunities for use of or connection to intra State Transmission System
4. To specify planning and design standards, which will be applied by STU in planning and development of the powersystem.
[clause 4.2]
Planning Code for Intra-state Transmission- Scope
The Planning Code applies to STU, other State Transmission Licensees, Intra-State Generating Station (IaSGS), connected to and/or using and involved in developing the IaSTS. This Planning Code also applies to Generating Companies, IPPs, Open Access Users and other licensees, regarding generation and/or transmission of energy to/from the IaSTS.
[clause 4.3]
[clause 4.3]
Planning Code for Intra-state Transmission- Planning Philosophy
1. The STU shall carry out planning process from time to time as per the requirement for identification of intra-State transmission system including transmission system associated with Generation Projects.
2. While planning schemes, the erspective plan formulated by CEA, EPS, Transmission Planning Criteria and guidelines issued by the CEA, Renewable capacity addition plan by AEDA etc. shall be considered in addition to the data of authenticated nature collected from and in consultation with Users by STU.
3.The STU shall formulate the intra-State transmission proposals including system strengthening scheme identified on the basis of the planning studies would be discussed, reviewed and finalized in the meetings of Grid Code Management Committee.
4. The transmission system plan shall include information related intra-State transmission lines, additional equipment including transformers, capacitors, reactors, Static VAR Compensators and Flexible Alternating Current Transmission Systems.
5. The transmission system plan shall also include information on targets set in the preceding plans and progress achieved on the identified intra-State/inter-State transmission schemes and system strengthening schemes.
6. The plan reports shall contain a chapter on additional transmission requirement which may include not only intra-State transmission lines but also additional equipment such as transformer, capacitors, reactors etc.
7. Based on plans prepared by CTU, STU shall have to plan their systems to further evacuate power from ISTS and to optimize the use of integrated transmission network.
8. The State Transmission Utility shall send a copy of transmission system plan for the IaSTS to the Commission by 31st December each year and also publish it on its website.
[clause 4.4]
2. While planning schemes, the erspective plan formulated by CEA, EPS, Transmission Planning Criteria and guidelines issued by the CEA, Renewable capacity addition plan by AEDA etc. shall be considered in addition to the data of authenticated nature collected from and in consultation with Users by STU.
3.The STU shall formulate the intra-State transmission proposals including system strengthening scheme identified on the basis of the planning studies would be discussed, reviewed and finalized in the meetings of Grid Code Management Committee.
4. The transmission system plan shall include information related intra-State transmission lines, additional equipment including transformers, capacitors, reactors, Static VAR Compensators and Flexible Alternating Current Transmission Systems.
5. The transmission system plan shall also include information on targets set in the preceding plans and progress achieved on the identified intra-State/inter-State transmission schemes and system strengthening schemes.
6. The plan reports shall contain a chapter on additional transmission requirement which may include not only intra-State transmission lines but also additional equipment such as transformer, capacitors, reactors etc.
7. Based on plans prepared by CTU, STU shall have to plan their systems to further evacuate power from ISTS and to optimize the use of integrated transmission network.
8. The State Transmission Utility shall send a copy of transmission system plan for the IaSTS to the Commission by 31st December each year and also publish it on its website.
[clause 4.4]
Planning Code for Intra-state Transmission- Criterion
1. The planning criteria are based on the security philosophy on the security philosophy as per the Transmission Planning Criteria and other guidelines as given by CEA.
2. The State Transmission System shall be capable of withstanding against ontingency outages i.e. Outage of a 132kV D /C line, 220 kV D/C line, 400 kV S/C line, 765 kV S/C Line and single Interconnecting Transformer without necessitating load shedding or rescheduling of generation during Steady State Operation.
3. The IaSTS shall be capable of withstanding and be secured against contingency outages i.e. Outage of a 400 kV S/C line with TCSC, 400 kV D/C line, 765 kV S/C line with series compensation and both pole of HVDC Bipole line without necessitating load shedding but could be with rescheduling of generation during steady state operation.
3. The IaSTS 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. However, some planning parameters of the Intra State transmission system may vary according to directives of AERC.
[clause 4.6]
2. The State Transmission System shall be capable of withstanding against ontingency outages i.e. Outage of a 132kV D /C line, 220 kV D/C line, 400 kV S/C line, 765 kV S/C Line and single Interconnecting Transformer without necessitating load shedding or rescheduling of generation during Steady State Operation.
3. The IaSTS shall be capable of withstanding and be secured against contingency outages i.e. Outage of a 400 kV S/C line with TCSC, 400 kV D/C line, 765 kV S/C line with series compensation and both pole of HVDC Bipole line without necessitating load shedding but could be with rescheduling of generation during steady state operation.
3. The IaSTS 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. However, some planning parameters of the Intra State transmission system may vary according to directives of AERC.
[clause 4.6]
Planning Code for Intra-state Transmission- Planning Data
1. To enable STU to conduct System Studies and prepare perspective plans for electricity demand, generation and transmission, the Users shall furnish data, to STU from time to time. as detailed under Data Registration section as under:
2. To enable Users to co-ordinate planning design and operation of their plants and systems with the Intra State transmission system they may seek certain salient data of Transmission System as applicable to them, which STU shall supply from time to time
3. STU shall also furnish to all the Users, Annual Transmission Planning Report, Power Map etc.
[clause 4.7]
2. To enable Users to co-ordinate planning design and operation of their plants and systems with the Intra State transmission system they may seek certain salient data of Transmission System as applicable to them, which STU shall supply from time to time
3. STU shall also furnish to all the Users, Annual Transmission Planning Report, Power Map etc.
[clause 4.7]
Planning Code for Intra-state Transmission- Implementation of Transmission Plan
1. The primary responsibility of load forecasting within Distribution Licensees' Area of Supply rests with respective Distribution Licensee.
2. The Distribution Licensees shall determine peak load and energy forecasts of their areas for each category of loads for each of the succeeding 5 years and submit the same annually by 31st March to STU.
3. The Generating Company (APGCL presently) shall provide their generation capacity to STU for evacuating power from their power stations for each of the succeeding 5 years along with their proposals for transmission system augmentation and submit the same annually by 31st March to STU.
4. STU shall initiate the planning for strengthening the Intra State transmission system for evacuation of power from outside state stations.
5. Operation and Co-ordination Committee shall review and approve the load forecasts and the methodology followed by each of the Distribution Licensees.
6. The Intra State transmission system proposals identified on the basis of planning studies would be discussed, reviewed and finalised by the State Operation and Co-ordination Committee.
[clause 4.6.2-4.6.6]
2. The Distribution Licensees shall determine peak load and energy forecasts of their areas for each category of loads for each of the succeeding 5 years and submit the same annually by 31st March to STU.
3. The Generating Company (APGCL presently) shall provide their generation capacity to STU for evacuating power from their power stations for each of the succeeding 5 years along with their proposals for transmission system augmentation and submit the same annually by 31st March to STU.
4. STU shall initiate the planning for strengthening the Intra State transmission system for evacuation of power from outside state stations.
5. Operation and Co-ordination Committee shall review and approve the load forecasts and the methodology followed by each of the Distribution Licensees.
6. The Intra State transmission system proposals identified on the basis of planning studies would be discussed, reviewed and finalised by the State Operation and Co-ordination Committee.
[clause 4.6.2-4.6.6]
Connection Code/ Grid connectivity- Introduction
1. Connection Conditions specify the minimum technical, design and operational criteria, which must be complied with by STU and any person connected to, or seeking connection to Intra State transmission system.
2. It set out procedures by which STU shall ensure compliance by any person with above criteria as pre-requisite for establishment of an agreed connection.
[clause 5.1]
2. It set out procedures by which STU shall ensure compliance by any person with above criteria as pre-requisite for establishment of an agreed connection.
[clause 5.1]
Connection Code/ Grid connectivity- Objective
1. To treat all users or prospective equitably.
2. To restrict any new or modified connections, when established, whichshall either impose any adverse effect on existing Users or shall new connection suffer adversely due to existing Users.
3.TO specify optimum design and operational criteria, to assist Users in their requirement to comply with License obligations.
4. To provide ownership and responsibility for all the equipments are clearly specified in a schedule (Site Responsibility Schedule) for every site, where a connection is made.
[clause 5.2]
2. To restrict any new or modified connections, when established, whichshall either impose any adverse effect on existing Users or shall new connection suffer adversely due to existing Users.
3.TO specify optimum design and operational criteria, to assist Users in their requirement to comply with License obligations.
4. To provide ownership and responsibility for all the equipments are clearly specified in a schedule (Site Responsibility Schedule) for every site, where a connection is made.
[clause 5.2]
Connection Code/ Grid connectivity- Procedure for connection
1. The User shall submit the application containing all the information as may be reasonable required to STU.
2. STU shall make a formal offer within 90 days of the receipt of the application.
3. The offer shall specify and take into account any works required for the extension or reinforcement of the Intra State transmission system necessitated by the applicant's proposal and for obtaining any consent necessary for the purpose.
4. Any offer made by STU shall remain valid for a period of 60 days.
5. In the event of offer becoming invalid or not accepted by the applicant, STU shall not be required to consider any further application from the same applicant within 12 months.
[clause 5.5]
2. STU shall make a formal offer within 90 days of the receipt of the application.
3. The offer shall specify and take into account any works required for the extension or reinforcement of the Intra State transmission system necessitated by the applicant's proposal and for obtaining any consent necessary for the purpose.
4. Any offer made by STU shall remain valid for a period of 60 days.
5. In the event of offer becoming invalid or not accepted by the applicant, STU shall not be required to consider any further application from the same applicant within 12 months.
[clause 5.5]
Connection Code/ Grid connectivity- Connection Agreement
1. All Users connected to or seeking connection to the InSTS shall enter into a connection agreement with the STU/Transmission Licensee.
2. However, in respect of existing connections a relaxation of one year is allowed so that present arrangement may continue in the interim.
3. Connection Agreement (or the offer for a Connection Agreement) shall include, as appropriate, within its terms and conditions the following:
3.1. A condition requiring both parties to comply with the Grid Code.
3.2. Details of connection and/or use of system charges.
3.3. Details of any capital related payments arising from necessary reinforcement or extension of the system.
3.4. Diagram of electrical system to be connected.
3.5. General philosophy, guidelines etc on protection.
3.6. A Site Responsibility Schedule
[clause 5.6]
2. However, in respect of existing connections a relaxation of one year is allowed so that present arrangement may continue in the interim.
3. Connection Agreement (or the offer for a Connection Agreement) shall include, as appropriate, within its terms and conditions the following:
3.1. A condition requiring both parties to comply with the Grid Code.
3.2. Details of connection and/or use of system charges.
3.3. Details of any capital related payments arising from necessary reinforcement or extension of the system.
3.4. Diagram of electrical system to be connected.
3.5. General philosophy, guidelines etc on protection.
3.6. A Site Responsibility Schedule
[clause 5.6]
Connection Code/ Grid connectivity- Important technical requirements for connectivity to the grid
1.All utilities shall have ABT meters in place for (1) inter-state interface (2) intra-state utility interface (3) open access consumers interface lines.
2.Reliable and efficient speech and data communication systems shall be provided to facilitate necessary communication and data exchange must be incorporated
3. All utilities shall have in place a cyber security framework to identify the critical cyber assets and protect them so as to support reliable operation of the grid.
4. The rated frequency of State Grid shall be 50.0 Hz and shall be regulated by the provisions of IEGC and any other Regulations as may be specified by the appropriate Commission.
5. The variation of voltage at the inter connection point may not be more than the voltage range specified in the grid code.
[clause 5.10, 5.11, 5.12]
2.Reliable and efficient speech and data communication systems shall be provided to facilitate necessary communication and data exchange must be incorporated
3. All utilities shall have in place a cyber security framework to identify the critical cyber assets and protect them so as to support reliable operation of the grid.
4. The rated frequency of State Grid shall be 50.0 Hz and shall be regulated by the provisions of IEGC and any other Regulations as may be specified by the appropriate Commission.
5. The variation of voltage at the inter connection point may not be more than the voltage range specified in the grid code.
[clause 5.10, 5.11, 5.12]
Corrigendum/ Amendment, if any
No