Tariff Regulations
West Bengal
The West Bengal Electricity Regulatory Commission has issued the Terms and Conditions of Tariff regulations dated 29th April 2011. The primary purpose of these regulations is to determine of tariff of generating companies, transmission & distribution licensees and SLDC for the year 2011-12 and onwards and Annual Performance Review for the year 2009-10 and onwards.
West Bengal Electricity Grid Code, 2007
Resolution By
WBERC
Notification No. and date
WB(PartI)/ 2007/SAR62 Dated 04.04.2007
Objectives
1. To define the principles, the guidelines and standards to be followed by various agencies and participants in the system to plan, develop, expand, maintain and operate the State Grid in most efficient, equitable, reliable, safe and economic manner
2. To define the standard of the service for compliance by all participants with regard to quality and reliability
3. To provide the ways and means of planning of the State Transmission System and its development
4. To provide the methods of operation of the State Grid under normal, abnormal and emergency conditions
5. To make room for documentation of the principles and procedures, which define the relationship between various users of the STS and SLDC
6. To ensure the economy and efficiency in the operation of the State Grid in the State and to achieve compliance with the grid standard on direction of SLDC by every licensee and others involved in operation of the State Grid
[clause 1.4.2]
2. To define the standard of the service for compliance by all participants with regard to quality and reliability
3. To provide the ways and means of planning of the State Transmission System and its development
4. To provide the methods of operation of the State Grid under normal, abnormal and emergency conditions
5. To make room for documentation of the principles and procedures, which define the relationship between various users of the STS and SLDC
6. To ensure the economy and efficiency in the operation of the State Grid in the State and to achieve compliance with the grid standard on direction of SLDC by every licensee and others involved in operation of the State Grid
[clause 1.4.2]
Regulations called as
West Bengal Electricity Regulatory Commission (State Electricity Grid Code) Regulations, 2007 or in short WBEGC
Planning Code for Intra-state Transmission- Introduction
The STU shall discharge all functions of planning and coordination relating to STS with CTU, State Government, CEA, RPC and other related organizations, who shall utilize the STS for evacuation or injection or drawal of power.
[clause 2.1]
[clause 2.1]
Planning Code for Intra-state Transmission- Planning Philosophy
1. The primary responsibility of load forecasting rests with the distribution licensees, who shall follow the respective perspective plans as per Tariff Regulations.
2. The STU shall work out on the basis of projected loads and losses of the system, the net energy requirement and peak load requirement at generation end.
3. The STU shall workout the requirement of additional transmission capacity after taking into account, the existing capacity, future requirement of power evacuation from new power generating projects.
4. The STU shall carry out planning process from time to time as per the requirement for identification of major State Transmission System, including the transmission system associated with generation projects and system strengthening schemes such as Perspective plan formulated by CEA, EPS, Transmission Planning Criteria and guidelines issued by the CEA,NEP etc.
5. The plan shall indicate and include a chapter on proposed STS scheme open for private investment by the STU, based on which the entrepreneurs can formulate primary investment decisions.
6. The planning report shall indicate the action taken to fulfill the additional requirements and actual progress made on new schemes.
7. Based on the load forecast and the additional generation required for 10 years period the STU shall develop a longterm
plan for STS considering generation capacity addition programme and expansion in distribution system.
8. A 5 year rolling plan shall also be finalized by the STU every year for requirement arising out of expansion of the STS, generation and distribution systems to meet the future demand.
[clause 2.2]
2. The STU shall work out on the basis of projected loads and losses of the system, the net energy requirement and peak load requirement at generation end.
3. The STU shall workout the requirement of additional transmission capacity after taking into account, the existing capacity, future requirement of power evacuation from new power generating projects.
4. The STU shall carry out planning process from time to time as per the requirement for identification of major State Transmission System, including the transmission system associated with generation projects and system strengthening schemes such as Perspective plan formulated by CEA, EPS, Transmission Planning Criteria and guidelines issued by the CEA,NEP etc.
5. The plan shall indicate and include a chapter on proposed STS scheme open for private investment by the STU, based on which the entrepreneurs can formulate primary investment decisions.
6. The planning report shall indicate the action taken to fulfill the additional requirements and actual progress made on new schemes.
7. Based on the load forecast and the additional generation required for 10 years period the STU shall develop a longterm
plan for STS considering generation capacity addition programme and expansion in distribution system.
8. A 5 year rolling plan shall also be finalized by the STU every year for requirement arising out of expansion of the STS, generation and distribution systems to meet the future demand.
[clause 2.2]
Planning Code for Intra-state Transmission- Criterion
1. The permissible voltage excursions for transmission and sub transmission system during the steady state operation is + 5% for 400 KV and 220 KV level and + 10% for 132 KV and below.
2. This limit may be exceeded only during the outages of 400 KV lines
3. The standard fault rating of switchgear at 132 KV is 31.5 KA and at 220 KV and 400 KV is 40 KA.
4. The capacity of any single sub station shall not normally exceed 1000 MVA for 400 KV, 500 MVA for 220 KV and 250 MVA for 132 KV.
5. In all substations (132 KV and above), at least two transformers shall be provided.
6. The STU shall carry out planning studies for reactive power compensation of generating stations under WBERC purview including reactive power compensation required at their switchyard.
[clause 2.3.2]
2. This limit may be exceeded only during the outages of 400 KV lines
3. The standard fault rating of switchgear at 132 KV is 31.5 KA and at 220 KV and 400 KV is 40 KA.
4. The capacity of any single sub station shall not normally exceed 1000 MVA for 400 KV, 500 MVA for 220 KV and 250 MVA for 132 KV.
5. In all substations (132 KV and above), at least two transformers shall be provided.
6. The STU shall carry out planning studies for reactive power compensation of generating stations under WBERC purview including reactive power compensation required at their switchyard.
[clause 2.3.2]
Connection Code/ Grid connectivity- Introduction
Connectivity conditions specify the minimum technical and design criteria which shall be complied with by any agency connected to, or seeking connection to the STS to transmit electrical energy eitherway from/to the STS. The STU shall ensure compliance by any agency with the above criteria as a prerequisite for the establishment of an agreed connection.
[clause 3.1]
[clause 3.1]
Connection Code/ Grid connectivity- Procedure for connection
1. Any agency seeking to establish new or modified arrangement of connection to STS for use of it, shall submit an application on specified format to the STU along with the following details:
1.1.A report stating the purpose of the proposed connection and / or modification, connection point, description of apparatus to be connected or modification of the apparatus already connected and beneficiaries of the proposed connection
1.2. Construction schedule and target completion date;
1.3.A confirmation that the agency shall abide by WBEGC and provisions of IE Rules or as may be specified in the regulations made by CEA under the Act.
2. The STU shall normally make a formal offer to the agency within one month from the date of receipt of all details along with the proposed changes, if any.
3. The offer shall stipulate and take into account any works required for the extension or reinforcement of the transmission system to satisfy the requirements of the connection application and for obtaining statutory clearances
4. Final decisions on applications for connections to STU network shall be provided by the STU within 45 days from the date of submission of consent to it by the agency.
5. All offers (other than preliminary offers) including revised offers shall remain valid for 60 days of issue of the offer.
6. Prior to providing any connectivity to a consumer with the STS, the licensee shall take approval of the STU and the SLDC after meeting all technical and commercial requirements of the STU and the SLDC.
[clause 3.2]
1.1.A report stating the purpose of the proposed connection and / or modification, connection point, description of apparatus to be connected or modification of the apparatus already connected and beneficiaries of the proposed connection
1.2. Construction schedule and target completion date;
1.3.A confirmation that the agency shall abide by WBEGC and provisions of IE Rules or as may be specified in the regulations made by CEA under the Act.
2. The STU shall normally make a formal offer to the agency within one month from the date of receipt of all details along with the proposed changes, if any.
3. The offer shall stipulate and take into account any works required for the extension or reinforcement of the transmission system to satisfy the requirements of the connection application and for obtaining statutory clearances
4. Final decisions on applications for connections to STU network shall be provided by the STU within 45 days from the date of submission of consent to it by the agency.
5. All offers (other than preliminary offers) including revised offers shall remain valid for 60 days of issue of the offer.
6. Prior to providing any connectivity to a consumer with the STS, the licensee shall take approval of the STU and the SLDC after meeting all technical and commercial requirements of the STU and the SLDC.
[clause 3.2]
Connection Code/ Grid connectivity- Connection Agreement
A connection agreement shall include (but may not be limited to), as appropriate, within its terms and conditions, the following:
1. A condition requiring both parties to comply with WBEGC and Grid Code
2. The details of connection, technical requirements and commercial arrangements
3. The details of any capital expenditure arising from necessary reinforcement or extension of the system and demarcation of the same between the concerned parties
4. A Site Responsibility Schedule
5. The metering arrangements
6. General procedure, guidelines
[clause 3.3]
1. A condition requiring both parties to comply with WBEGC and Grid Code
2. The details of connection, technical requirements and commercial arrangements
3. The details of any capital expenditure arising from necessary reinforcement or extension of the system and demarcation of the same between the concerned parties
4. A Site Responsibility Schedule
5. The metering arrangements
6. General procedure, guidelines
[clause 3.3]
Connection Code/ Grid connectivity- Important technical requirements for connectivity to the grid
1. For Generating Station, the switchyard voltage of connection point may be 400 / 220 / 132 KV or as agreed with the Licensee with whose network the connection is to be effected.
2. For Distribution Licensee, the voltage of connection point may be as agreed with Generating Station or the Licensee with whose network the connection is to be effected but the same cannot be below 6 KV. The connection point shall be the outgoing feeder gantry of Generating Station switchyard or the substation in case of the Licensee.
3. For the ISTS of the Regional Grid, the connection point, protection scheme, metering scheme, metering point and the voltage shall be in accordance with the mutual agreement between owners of two connecting systems, until and unless they are specified by CEA in its Regulations under the Act.
4.For CPPs and EHT/HT Consumers, voltage may be 220/132/66/33 KV or as agreed with Licensee with whose network the connection is to be effected.
[clause 3.4.1]
2. For Distribution Licensee, the voltage of connection point may be as agreed with Generating Station or the Licensee with whose network the connection is to be effected but the same cannot be below 6 KV. The connection point shall be the outgoing feeder gantry of Generating Station switchyard or the substation in case of the Licensee.
3. For the ISTS of the Regional Grid, the connection point, protection scheme, metering scheme, metering point and the voltage shall be in accordance with the mutual agreement between owners of two connecting systems, until and unless they are specified by CEA in its Regulations under the Act.
4.For CPPs and EHT/HT Consumers, voltage may be 220/132/66/33 KV or as agreed with Licensee with whose network the connection is to be effected.
[clause 3.4.1]
Connection Code/ Grid connectivity- Schedule of assets of Regional Grid
The STU shall submit annually to WBERC by 30th September each year a schedule of transmission assets, which constitute the State grid as on 31st March of that year indicating ownership on which the SLDC has operational control and responsibility.
[clause 3.10]
[clause 3.10]
Corrigendum/ Amendment, if any
Yes
West Bengal Electricity Grid Code 2007 (1st Amendment)
Resolution By
WBERC
Notification No. and date
43/WBERC Dated 22.05.2009