In exercise of the powers conferred by sub-section (zp) of Section 181 (2) read with sub-section (h) of Section 86( I) of the Electricity Act, 2003 (36 of2003). the Delhi Electricity regulatory Commission hereby makes the following Regulations, namely :-- Chapter I General I. Short title, extent and commencement
1.1 These Regulations may be called the "Delhi Electricity Regulatory Commission (State Grid Code) Regulations, 2008". in short Delhi Grid Code (DGC).
12 TIlese Regulations shall extend to the whole of the National Capital Territory of Delhi
1.3 These Regulations shall come into force from the date of its publication in the Official Gazette.
2. Definitions
2.1 In these Regulations unless the context otherwise requires:
(a) ,. Act" means the Electricity Act, 2003 (36 of 2003), including amendments thereto;
(b) "Apparatus" means Electrical Apparatus and includes all machines, fittings, accessories and appliances in which conductors are used;
(c) "Automatic Voltage Regulator" means a continuously acting automatic excitation control system to control the voltage oLa Generating Unit measured at the generator terminals;
Cd) "Black Start Procedure" means procedure necessary to recover the grid from a partial or a total blackout;
(e) "Commission" means the Delhi Electricity Regulatory Commission;
(f) "Connection Agreement" means an agreement DELHI GAIEJTE: EXTRAORDINARY setting out the tenns relating to co~nection to and'or use of the State Transmission System:
(g) "Connection Point" means a point at which a User's or Transmission Licenser.:·s Plant and/or Apparatus connects to the State Transmission System:
(h) 'df/dt Relay' means a reby I\hich operates whcn the rate of chunge of system frequency (o\·er time) goes higher than a laid down limit and initiates load shedding;
(i) "Disturbance Recorder" means a device provided to record the behaviour of the preselected digital and analog values of the system parameters during an Event;
0) "Data Acquisition System" means a device provided to record the sequence of operation ill time, of the relays!equipments!system parameters at a location;
(k) "Distribution Control Centre (DCC)" means the office and associated facilities established by the Distribution Licensee to coordinate with SLDC and to carry out the functions as laid down in the DGC;
(k-a) "Event" means an unscheduled or unplanned Occurrence in the State transmission system including faults, incidents and breakdowns;
(l) "Event Logger" means a device provided to record the sequence ofoperatiofl in time, of the relays/ equipments at a location during an Event;
(m) "Fault Locator" means a device provided at the end of a transmission line to measure/indicate the distance at which a line faul! may have occurred;
(n) "Flexible Alternating Current Transmission (FACT)" means facilities that enable power flows on A.C. lines to be regulated, to control loop flows, line loading etc.
(p) "Maximum Continuous Rating" means the normal rated full load MW output capacity of a Generating Unit which can be sustained on a Continuous basis at laid down conditions;
(q) "Operation" means a scheduled or planned action relating to the operation of a System;
(r) "Single Line Diagram" means diagrams which are a schematic representation of the HV/EHV apparatus and the comlections to all external circuits at a Connection Point incorporating its numbering nomenclature and labeling;
(5) "Site Common Drawing" means drawings prepared for each Connection Point, \\·hich incorporates layout drawings, electrical layout drawings, common protection.'control drawings and common service drawings;
(t) "Spinning Reserve" means generating capacity with some reserve margin, at standard rated frequency of 50 Hz, that is synchronized to the (PART IV system and is ready to provide incn:ased generation at shon not ice pursuant to disp;_J!ch instruction or instantaneously in resrnn:il' tll J frequency drop:
(u) "State Transmission System" (STS) mean~ the:
transmission of electricity within the territor., or Stute on a system built, owned, operated.
maint~ined or controlled by the Statl' Transmission Utility (STU) and 'or Transmis~il'f1 Licensee(s).
(v) "Static VAR Compensator" means an electrical facility designed for the purpose of generating or absorbing Reactive Powcr;
(x) "Under Frequency Relay" means a relay which operates when the system frequency falls bell)\\ a laid down limit and initiates load shedding:
"User" refers to persons. including in-Slafl.'
Generating Stations, Distribution Licensee~.
Consumers of the Distribution Licensees directly connected to State Transmission System (STS), and those availing of Open Access and connected to and/or using thc STS, as more panicularly identified in each Section ofthe DGC.
Words or expressions used herein and n()t defined in these Regulations shall have the meanings assigned to them under the Act and the Indian Electrici!)'Grid Code (lEGe) specified by Central Electricity Regulatory COll1ll1issior, under clause (h) of Section 79 urthe Act. fai lin;;!
which they shall have the meaning as commonly understood in Electricity Industry.
(y)
3.1ntroduction
3.J The Delhi Grid Code eDGC) lays down the' regulations, guidelines and standards to he followed by various agencies and panicipants in the STS to plan, develop, maintain and operate:
the STS, a part of Non hem Region Grid System.
in the most efficient, reliable, economic, and secure manner, while facilitating a health~ competition in the generation and supply of e lectrici!)'.
4.0bjecth·e
4.1 The DGC is a document that governs the boundary between the State Transmission Utility (STU), Transmission Licensee(s) and other Users and establishes procedures for operations of facilities. whieh use the STS. It lays down both the information requirements and the procedures governing the relationship between various Users of STS as well as the State Load Despatch Centre (SLDC). It should be noted that the DGC is not concerned with the detuiled design and operation of Generators.
Power Stations. Suppliers and Distribution Systems, provided that their overall compatibility with the Transmission System needs are assured.
PART IV] DELHl GAZE'fTE: EXTRAORDINARY 23 41 The DGC covers all material technical aspects relating to connections to and operation and usc of the STS including the operation of electric lines and electrical plant connected thereto in so far as is relevant to the operation and use of the Transmission System. It is designed so as to permit the planning development, maintenance and operation to facilitate an efficient, coordinated, secured, reliable and economical system for the transmission and supply including trading of electricity in the State.
S.Scope of Regulations and extent of application
5.1 These Regulations shall apply to -
(a) the SLOC;
(b) every Transmission Licensee in the State including the STU;
(c) every User who is connected to and/or uses the STS:
Provided that the Commission may issue directions relieving any Transmission Licensee or User, either suo-motu or based on an application submitted by such Transmission Licensee or User, of their obligations to implement or comply with the OGC to the extent as may be stipulated in the directions.
51 Transmission Licensee(s), forming part of the STS, and User(s), having connection(s) to the STS, as on date of notification of these Regulations shall be given a maximum period of one year to comply with the following requirements under these 'Regulations:
(a) Entering into a Connection Agreement in accordance with Regulation 14;
(b) Providing for protection systems in accordance with Regulations 16.2 and 16.3;
(c) Providing for communication facilities in accordance with Regulation 17;
Cd) Providing for system recording instruments in accordance with Regulation 18;
(e) Developing Single Line Diagrams in accordance with Regulation 19.3.1;
(f) Developing Site Common Drawings in accordance with Regulation 19.4.2; and
(g) Installation and Operation of meters in accordance with Metering Procedure developed as per Regulation 33.
5.3 The date of applicability of provisions related to Free Governor Action, as provided in Regulation 22.9, Regulation 22.10, Regulation
22.11 and Regulation 22.12 of these Regulations, .shall be consistent with relevant provisions of thelEGC.
5.4 Persons availing of open access, who are connected to and/or use the STS, shall comply with the Terms and Conditions of Open Access Regulations notified by the Commission.
6. Management of the Delhi Crid Code (DCC)
6.1 The DGC is specified by the Commission as per Section 86 (I) (h) of the Act, after ensuring that it is consistent with the IEGC. Any amendments to DGC shall also be specified by the Commission only.
6.1.1 The DGC and its amendments shall be finalized and notified adopting the specified procedure followed for Reguiations issued by Commission.
6.J.2 The requests for amendments to/modification,s in the DGC and for removal of difficulties, including those proposed in the reports under Regulations 6.3 be!ow, shall be addressed to Convener, Orid Coordination Committee (GCC), for periodic consideration, consultation and disposal. Such amendments/modifications suggested shall be finalized after obtaining opinions trom all Users of the State Grid.
6.1.3 Any dispute or query regarding interpretation of DGC may be addressed to the Secretary of the Commission and clarification issued by the Commission shall be taken as final and binding on all concerned.
6.2 Grid Coordination Committee (GCC)
6.2.1 A Grid Coordination Committee shall be constituted by the State Transmission Utility within thirty (30) days trom the date of notification of these Regulations.
6.2.2 The Grid Coordination Committee shall be responsible for the following matters, namely:-
(a) facilitating the implementation of these Regulations and the procedures developed under the provisions of these Regulations;
(b) assessing and recommending remedial measures for issues that might arise during the course of implementation of provisions of these Regulations and the procedures developed under the provisions of these Regulations;
(c) review of the OGC, in accordance with the provisions of the Act and these Regulations;
Cd) analyse any major grid disturbance after its occurrence, . (e) examining problems raised by the Users, and
(f) investigate in case any Beneficiary is indulging in unfair gaming or collusion after getting reported from SLDC.
(g) review of the complete statement of the State UI and the State Reactive Energy account tabled by the SLDC through its Commercial Committee (a sub-committee ofGCC); and
(h) such other matters as may be directed by the Commission from time totime.