(a) One member from the STU;
(b) One member of the SLOC;
24 [PART IV
(c) One member to represent the generating companies in the State;
(d) One member to represent Badarpur Thermal Power Station;
(t:) One member to represent the Transmission Licensees in the State, other than the STU;
(0 One member each to represent the Distribution Licensees in the State;
(g) One member to represent the Electricity Traders in the State;
(h) One member to represent the Northern Regional Load Despatch Centre (NRLDC); and
(i) Such other persons as may be nominated by the Commission:
Provided that the member fTOmthe STU shall be the Chairperson of the Committee:
Provided also that Chairperson shall nominate one person from the SLDC as the Convener of the Grid Coordination Committee:
Provided further that the STU shall, in coordination with State Load Despatch Centre, facilitate and manage the functioning of the Grid Coordination Committee:
Provided further that the Committee will frame its own rules of business for the conduct of its meeting and other related matters.
6.2.4 The members of the Grid Coordination Committee shall be as follows:
(a) the concerned Director of the STU, having the responsibility of looking after operational activities of the STU shall be the member referred to in clause (a) of Regulation 6.2.3 above;
(b) the memberreferred to in clause (b) of Regu lation
6.2.3 above shall be the head of the SLDC;
(c) the members referred to in clauses (c), (e), (g) and (h) of Regulation 6.2.3 above shall be nominated by their respective organizations, which organizations will be selected in rotation from among all such organizations in the State.
The term of each such member, selected in rotation, shall be one (I) year:
Provided that the members nominated by each of the organisation to the above Committee shall be holding a senior position in their respective organization.
6.3 GridCodeReviewbyGCC
6.3.1 DGC shall be reviewed by the Grid Coordination Committee at least once in every twelve (12) months.
~.3.2 Upon completion of such review, the Grid Coordination Committee shall send a report to the STU providing information regarding:
(a) outcome of the review; and
(b) any proposed revisions to the DGC.
6.3.3 The STU shall send the report, referred in Regulation 6.3.2, to the Commission with it'S recommendations.
7 Functional Responsibilities of Entities and their Linkages
7.1. State Load Despatch Centre (SLDC)
7.1.1 Oper<ftion and management of STS is an important and complex activity which regularly requires addressing a number of complex, and often conflicting, issues and the SLOC plays the most important role in this. The functions of SLOC are stated under Section 32 of the Act.
7.1.2 The SLDC shall discharge the functions assigned to it under the provisions of the Act and the Regulations in an independent and unbiased manner:
Provided that in the event of the SLOC being operated by the STU, as per first proviso of subsection (2) of Section 31 of the Act, adequate autonomy shall be provided to the SLDC for it to be able to discharge its functions in the above mentioned manner.
7.2 State Transmission Utility (STU)
7.2.1 The STU shall play the main role for evacuation of generated power by Generating Companies, transmission of power to Distribution Companies, and exchange of power through inter-connection with thc Central Transmission Utility (CTU) and IPPs and other entities. In abiding by the provisions of the Act, the STU.
• shall discharge functions of planning and coordination relating to the STS with (i) CTU, (ii) State Government, (iii) Generating and Distribution CompaniesiLicensees, (iv) CEA, (v) NRPC, and (vi) any other person notified by the State GOYl.
• .Provide non-discriminatory open access to its Transmission System for use by any Licensee or Generating Company/IPP and any consumer as per the Open Access Regulation notified by the State Regulatory Commission on payment of necessary charges.
7.3 Transmission Licensee(s)
7.3.1 The functions of Transmission Licensee(s) are as follows:
• Build, maintain and operate an efficient, coordinated and economical Transmiss.ion System.
• Comply with the directions ofSLDC.
• Provide non-discriminatory Open Access as in
7.2.1 above.
7.4 Distribution Companies/Licensees
7.4.1 The functions of Distribution Licensee are as follows:
25DELH1 GAZEITE: EXTRAORDINARYPART IV1 ,. Develop and maintain an efficient, coordinated and economical Distribution System in his Area of Supply;
• Provide non-discriminatory Open Access to its Distribution System for use by :--
(i) Any licensee or generating company on payment of the wheeling charges: or
(ii) Any consumer as per the Open Access Regulation notified by the Commission under sub-section (2) of Section-D42 of the Act, on payment of the transmission charges and a surcharge thereon, as may be specified by the Commission.
7.4.2 Further, in order to facilitate load control, scheduling and despatch, and open access operation etc. under the ABT mechanism within the state, each Distribution Licensee shall establish a Distribution Control Center (DCC) within its Area of Supply, having adequate communication facilities with round the clock manning. it shali take appropriate action in response to any Event in the grid in coordination with the SLOe.
7.4.3 The Distribution Licensee shall inform the SLDC about the details of 15 minutes'lhourly/daily/ weekly/monthly demand and energy requirement and also contracts entered into for importing power from different sources and coordinate with SLDC in real time operation. It shall assist!
follow the directions ofSLDC in scheduling its exchange of power and help in controlling the operation of the system by adjustment of drawal from the system. They shall take special care for draWl/injection of reactive power from/to the State Power System.
7.5 Generating Companies
7.5.1 The generating companies connected to andlor using the STS for evacuating their generation, shall inform the STU and SLDC about the contracts entered into with different parties for exporting power along with its schedule from individual generating station under the company.
They shall follow the relevant provisions of the DGC and assist the SLDC in the real time operation and control of the system and scheduling of generation.
Chapter II Planning Code
8. Transmission System Planning
8.1 The STU shall publish on its Internet website the transmission system plan for the STS and shall also make the same available to any person upon request at a reasonable cost.
8.2 The transmission system plan shall cover a plan period of five (5) years commencing from the financial year immediately following the year in which it is published:
Provided that the transmission system plan shall be updated by the STU each year and published in the manner specified in Regulation 9.1 by the 30th day of September each year and shall cover a plan period of five (5) years commencing from the fmancial year immediately following the year in which it is published:
Provided further that the STU shall submit to the Commission a report indicating the performance of the existing STS during the previous fmancial year. The Licensee shall, if required by the Commission, publish a summary of the report in a manner to be determined by the Commission.
8.3 The form of the transmission system plan shall be provided by the STU.
8.4 The transmission system plan shall describe the plan for the STS and shall include the proposed State transmission schemes and system strengthening schemes for the benefit of all Users:
Provided that the transmission system plan may include information related not only to State transmission lines but also additional equipment including transformers, capacitors, reactors, Static VAR Compensators and Flexible Alternating Current Transmission Systems (FACT):
Provided further that the transmission system plan shall also include information on progress achieved on the identified State transmission schemes and system strengthening schemes.
8.5 The STU may, for the purpose of preparing the transmission system plan under these Regulations, seek such information as may be required by it, including generation capacity addition, system augmentation and long-tenn load forecast and all applications for open access:
Provided that the Distribution Licensees shall have the primary responsibility for developing long-term load forecasts for their respective license areas. The Distribution Licensee may use consistent data and methods in its load forecasting exercise, and be guided by applicable provisions and submissions of sales/demand.".
forecast under the MYT Regulations and License Conditions issued by the Commission, with approp(iate reasoning/explanation for deviation, if any:
Provided also that the STU shall consider, but not be bound by the information provided under this Regulation in preparing the transmission • system plan.
I 26 [PARr IVDELHI GAZEITE: EXTRAORDINARY
8.6 The STU shall also consider the following for the purpose of preparing the transmission system plan under these Rcgulations-
(a) Plans formulated by the Authority for the transmission system under the provisions of clause (a) of Section 71 ofthc Act;
(b) Latest available Electric Power Survey of the Authority;
(c) Grid Standards specified by the Authority under clause (d) of Section 73 of the Act;
(d) Transmission Plan formulated by Central Transmission Utility under the provisions of Grid Code specified by Central Electricity Regulatory Commission under clause (h) of Section 79 of the Act;
(e) Transmission Planning Criteria and Guidelines issued by the Authority;
(t) Recommendations/inputs, if any, of the Northern Regional Power Committee (NRPC);
(g) National Electricity Plan/National Electricity Policy which are relevant for development ofSTS; and
(h) Any other information/data source suggested by the Commission.
9. Planning Criterion
9.) The planning criterion shall be based on the security philosophy on which the STS has been planned. The security philosophy shall be as per the Transmission Planning Criteria and other guidelines as given by the Authority :
Provided that the STU shall carry out appropriate system studies while developing the transmission system plan.
92 The State Transmission System, as a general rule, shall be capable of withstanding and be secured against the following contingency outages without necessitating load shedding or rescheduling of generation during Steady State Operation:
(a) Outage ofa D/C line of voltage above 66 kY and below 400 kY or,
(b) Outage ofa SIC line of voltage of400 kV and above or,
(c) Outage of a single interconnecting Transformer:
Provided that the above contingencies shaH be considered assuming a pre-contingency system depletion (planned outage) of another 220 kY DIC line or 400 kV SIC line in another corridor and not emanating from the same substation.
9.3 All the Generating Units may operate within their reactive capability curves and the network voltage profile shall be maintained within voltagt:
limits specified.
9.4 The STS shall be carable of withstanding the loss of most severe single in-feed without loss of stability.
9.5 Anyone of the Events defined in the Regulation
9.2 above shall not cause:
(a) . Loss of supply;
(b) Prolonged operation of the system frequency below and above specified limits;
(c) Unacceptable high or low voltage;
(d) System instability;
(e) Unacceptable overloading of STS elements.
9.6 In all extra high voltage substations, suitable number and capacity of transformers shall be provided to have adequdte redundancy required to maintain firm capacity at the substation.
Expla na tion.- For the pUIpOseofRegu lation9.6, the term firm capacity shall mean the minimum transformation capacity available at the substation in case of outage of anyone transformer.
9.7 The STU shall carry out planning studies for Reactive Power compensation ofSTS inc luding reactive power compensation at the in-State Generating Station's switchyard
10. Planning Data
10.1 Transmission Licensees and Users are to supply following types of data to the State Transmission Utility for purpose of developing the transmission plan:
(a) Standard Planning Data;
(b) Detailed Planning Data.
102 Standard Planning Data
102.1 Standard Planning Data shall consist ofdetails which are expected to be normally sufficient for the STU to investigate the impact on the STS due to. User/Transmission Licensee development.
10.2.2 Transmission Licensees and Users shall provide the following data to the STU from time to time in the standard formats provided by the STU :
(a) Preliminary project planning data;
(b) Committed project planning data; and
(c) Connected planning data:
Provided that the STU shall provide a date for submission of information in the said formats, after providing reasonable time to Transmission Licensees and Users:
Provided that the STU shall develop standard formats, for submission of above mentioned data, within one (J) month from notification of these Regulations and make the same available
PART IV) DELHI GAZETfE : EXTRAORDINARY on its Internet website:
Provided also that the STU shall be guided by the formats, developed for submission of above mentioned data, under the provisions of the lEGe.
10J Detailed PI!lnning Data IOJ.1 Detailed Planning Data shall consist of additional, more· detailed data not normally expected to be required by State Transmission Utility to assess the impact of Userffransmission Licensee <ievelopment on the STS.
10.3.2 Detailed Planning Data shall be furnished by .the Users and Transmission Licensees as and when requested by the STU.
ChapterllI Connection Conditions
11. Connection Standard
11.1 The applicable technical. standards for connectivity to the STS shall be as per the Central Electricity Authority (Technical Standards for Connectivity to the Grid) Regulations, 2007, dated 21st February, 2007 as amended from time to time, and standards specified there under.
111 The applicable technical standards for construction of electrical plants and electric lines shall be as per the standards specified by the Authority under clause (b) of Section 73 of the Act:
Provided that the prevailing guidelines of the Authority shall be considered until the standards are notified under clause (b) of Section 73 of the Act by the Authority.
12. Safety Standard The applicable safety requirements for construction, operation and maintenance of electrical plants and electric lines shall be as per the standards notified by the Authority under clause
(c) of Section 73 read with Section 53 of the Act:
Provided that the prevailing guidelines of the AuthoritylIE Rules shall be considered until the standards are notified under clause (c) of Section 73 of the Act by the Authority.
13. Application for Connection
13.1 The STU shall prepare and submit to the Commission on an annual basis, a statement showing in respect of each of the five (5) succeeding financial years forecasts of circuit capacity, power flows and loading on the Transmission System as per its relevant License Conditions together with :
(a) such further information as shall be reasonably necessary to enable any person seeking Use of System to identify and evaluate the opportunities available when connecting to and making use of such system; and 27
(b) a commentary prepared by the STU indicating its views as to those parts of the STS most suited to new connections and transport of further quantities of electricity:
Provided that the STU shall publish on its Internet website the above statement for' the STS in such form as is approved by the Commission and shall also make the same available to any person upon request.
131 The STU or Transmission Licensee shall make arrangements for use of the STS by third parties as required under die Act, Regulations of the Commission, and relevant Licence Conditions.
Application for establishing new arrangement or modi fying existing arrangement of connection to andlor use of the STS shall be submitted by the concerned Transmi~sion Licensee or User to the STU:
Provided that the standard format for application mentioned in the Regulation 13.2 shall be developed by the STU and shall be made available at its Internet website within two (2) months of notification of these Regulations.
13J The application mentioned in Regulation 13.2 shall include the following details:
(a) Report stating the purpose of the proposed connection and/or modification, Transmission Licensee to whose system connection is proposed, description of apparatus to be connected or modification of the apparatus already connected and beneficiaries of the proposed connection;
(b) Construction schedule and target completion date; and
(c) Confirmation that the Transmission Licensee or the User shall abide by the provisions of DGC, Indian Electricity Rules, 1956 (lilltil the Regulations under Section 53 of the Act are made and such Regulations specified by the Authority thereafter) and various standards including Grid Connectivity Standards made pursuant to the Act.
13.4 The STU shall forward a copy of the application to the Transmission Licensee in whose system the connection is being sought, to the SLDC and to every Transmission Licensee (if any) within the State whose Transmission System is likely to be affected by such application.
13.5 The STU or Transmission Licensee, in whose system the connection is being sought, may carry out the power system studies as considered appropriate before allowing any new connection.
13.6 The STV shall, within Thirty (30) days, from the receipt of an application under Regulation 13.2 and after considering all suggestions and comments received by the parties identified under Regulation 13.4 :
28 DELHI GAZEITE: EXTRAORDINARY [PART IV
(a) accept the application with such modification or such conditions as may be laid down by the STU;
(b) reject the application for reasons to be recorded in wTiting if such application is not in accordance with the provisions of these Regulations.
13.7 In case of acceptance of an application as per sub-section (a) of Regulation 13.6, the STU shall make a formal offer to the applicant:
Provided that the STU shall fOlward a copy of the offer to the appropriate Transmission Licensee.
13.8 The voltage level at which the applicant is offered to be connected to the STS shall be governed by the standards notified by the Authority and prevailing guidelines adopted by the STU.
13.9 The applicant and ttie appropriate Transmission Licensee, in whose system the connection is being sought, shall finalise a Connection Agreement on acceptance of the ofter by the applicant:
Provided that the STU shall be provided with a copy of the Connection Agreement:
Provided further the SLDC shall be provided with a copy of the above mentioned Connection Agreement by the STU on request.
13.10 The STU shall, upon compliance ofthe required conditions by the concerned Transmission Licensee/User, shall notify the concerned Transmission LicenseelUser that it can be connected to the STS.
14. Connection Agreement
14.1 A Connection Agreement shall include, as appropriate, within its terms and conditions, the following information relating to the connection of the User or Transmission Licensee to the STS:
(a) A condition requiring both parties to comply with the DGC;
(b) Details of connection, technical requirements and commercial arrangements;
(c) Details of any capital expenditure arising from necessary reinforcement or extension of the system, data communication etc. and demarcation of the same between the concerned parties;
(d) Site Responsibility Schedule;
(e) General philosophy and guidelines on protection (i.e., in accordance with the STU's Protection Plan fmalised under Regulation .16.32);
(I) Protection systems (i.e., in consonance with the System Protection· Schemes prepared!
updated under Regulation 22.21);
(g) System recording instruments;
(h) Communication facilities; and
(i) Any other information considered appropriate by the STU or the Commission.
141 A Model Connection Agreement is placed at Annexure-I to Chapter-III.
15. Grid Parameter Variations
15.1 General.
i5.1.1 Transmission Licensees and Users shall ensure that Plant and Apparatus requiring service from or providing service to the STS is of such d~sign and construction that satisfactory operation of such Plant and Apparatus will not be prevented by variation in instantaneous values of system frequency and voltage from their nominal values and that such Plant and Apparatus shall not induce any adverse affect on the STS.
152 Frequencv Variation
152.1 Rated frequency of the system shall be 50.0 Hz and shall normally be controlled within the limits as per Regulations specified by the Authority.
15.3 Voltage Variation
15.3.1 The variations of voltage may not be more than the voltage range specified in the Regulations framed by the Authority.
16. Equipment at Connection Points
16.1 Sub-station Equipment
16.1.1 All Extra High Voltage (EHV) sub-station equipments shall comply with the standards issued by Bureau of Indian Standards!
International Electro Technical Commission!
Prevailing Code of Practice.
16.12 All equipment shall be designed, manufactured and tested and certified in accordance with the quality assurance requirements as per the standards of International Electro Technical Commission or the Bureau ofIndian Standards.
16.1.3 Each connection between a User and STS shall be controlled by a circuit breaker capable of interrupting, at the Connection Point, at least.
the short circuit current as advised by STU in the specific Connection Agreement.
16.2 Fault Clearance Times
16.2.1 Thc fault clearance time for primary protection schemes, when all equipments operate correctly, for a three phase fault (close to the bus-bars) on Users' equipment directly connected to STS and for a three phase fault (close to the bus-bars) on STS connected to Users' equipment, shall not be more than:
(a) 100 milli seconds for 400 kV and above;
(b) 160 milli seconds for 220 kV and below.
PART IV] DELHI GAZEITE: EXTRAORDINARY
162.2 Back-up protection shall be provided for required isolation/protection in the event of failure of the primary protection systems in a coordinated manner. If a Generating Unit is connected to the STS directly, it shall be capable of withstanding such fault, until clearing of the fault by back~up protection on the STS side.
16.3 Protection
16.3.1 Protection Systems shall be provided by all Transmission Licensees and Users to isolate the faulty equipments and protect the other components against all types of faults, internali external to them, within specified fault clearance time with reliability, selectivity and sensitivity:
Provided that all Users or Transmission Licensees shall provide protection systems as laid down in the Connection Agreement.
16.3.2 Relay setting coordination is being done at regional level by the NRPC, whereas provision of protections and relay settings shall be coordinated periodically throughout the State grid, as per a plan to be separately finalized by the STU.
16.4 Reactive Power Compensation
16.4.1 Reactive Power compensation and/or other facilities shall be provided by Users, 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 the STS and to maintain the STS voltage within the specified range.
16.4.2 Line Reactors may be provided to control temporary over voltage within the limits as set out in connection agreements.
16.4.3 The additional reactive compensation to be provided by the User shall be indicated by the STU in the Connection Agreement for implementation.
16.4.4 Users shall endeavour to minimize the Reactive Power drawal at an interchange point when the -voltage at that point is below 95% of rated voltage, and shall not inject Reactive Power when the voltage is above 105% of rated voltage.
Interconnecting Transformer taps at the respective drawal points may be changed to control the Reactive Power interchange as per the User's request to the SLDC, but only at reasonable intervals.
16.4.5 Switching in/out of all 4.00 kV bus and line Reactors throughout the grid shall be carried out as per instructions of the SLDC. Tap changing on ,all 400/220 kV Interconnecting Transformers shall also be done as per the instructions of the SLDC only.
17. Communication Facilities
17.1 Reliable and efficient speech and data 29 communication systems shall be provided to facilitate necessary communication and data exchange, and supervision/control of the State Grid by the State Load Despatch Centre, under normai and abnonnal conditions.
172 All Users and Transmission Licensees shall provide the required facilities at their respective ends as laid dO\Hl in the Connection Agreement:
Provided that the equipments!dcvices for communication and data exchange shall be provided considering the guidelines of the SLDC, the interface requirements and other such guidelines/specifications as applicable.
18. System Recording Instruments nu Recording instruments such as Data Acquisition System/Disturbance Recorder/ Event Logger/Fault Locator (including time synchronization equipment) shall be provided in the STS for recording of dynamic performance of the system.
18.2 All Users and Transmission Licensees shall provide all the requisite recording instruments as laid down in the Connection Agreement in accordance with the agreed time schedule.
J 9. Responsibilities for Operational Safety
19.1 Transmission Licensees and the Users shall be responsible for safety as indicated in Site Responsibility Schedules for each Connection' Point.
19.2 Site Responsibility Schedule
19.2.1 A Site Responsibility Schedule shall be produced by the concerned Transmission Licensee and the User detailing the ownership responsibilities of each, before execution of the project or connection, including safety responsibilities.
19.22 FOT every. connection to the STS, the Site Responsibility Schedule shall be prepared by the concerned Transmission Licensee pursuant to the relevant Connection Agreement and shall state the following for each item of plant and apparatus installed at the Connection Point:
(a) Ownership of the Plant! Apparatus;
(b) Responsibility for control of the Plantl Apparatus;
(c) Responsibility for operation of the Plant!
Apparatus;
Cd) Responsibility for maintenance of the Plant!
Apparatus; and
(e) Responsibility for all matters relating to safety of an~ persons at the Connection Point.
19.2.3 A Model Site Responsibility Schedule is provided at Annexure-II to Chapter-III.
30 [PART IVDELHI GAZETTE: EXTRAORDINARY
19.3 Single Line Diagrams
19.3.1 Single Line Diagram shall be furnished for each Connection Poini by the connected User or Transmission Licensee to the STU:
Prc;)Videdthat the STU shall furnish the above information to the SLDC on request.
19.3.2 Single Line Diagram shall include all High Tension (HT) connected equipment and the connections to all externa