(1) The licensee shall ensure that before connectivity to the grid, all the provisions with regard to the connectivity specified under these regulations are complied with by the requester.
(2) Before allowing connectivity to the requester, the compliance of the provisions laid down under ¹Hkkx IIIµ[k.M 4º Hkkjr dk jkti=k % vlk/kj.k 7 sub-regulations (2), (3) and (5) of regulation 6 shall be verified by the licensee and the verification of compliance of provisions of other regulations shall be in the form of self-declaration in the proforma of connection agreement which shall be checked and verified by the concerned licensee on sample basis.
(3) The user may be disconnected from the Grid by the licensee for non-compliance of any provision of these regulations and any non-compliance of the provisions of these regulations shall be reported by the licensee or the State Load Dispatch Centre or the Regional Load Dispatch Centre, as the case may be, to the appropriate Commission”.
4. In Part II of the Schedule to the said regulations, -
(a) In paragraph A1, in sub-paragraph (5), in the first proviso, after the figures “2014”, the following brackets and words shall be inserted, namely:- “Provided also that all hydro-electric generating units, where Techno-Economic Concurrence has been accorded by the Authority under section 8 of the Act, shall be capable of operating at the rated output at the power factor as specified in such techno-economic concurrence.”;
(b) For paragraph B, the following paragraph, shall be substituted, namely:- “B. Connectivity standards applicable to the wind generating stations, generating stations using inverters, wind - solar photo voltaic hybrid systems and energy storage systems.
The generating stations shall comply with the following requirements in addition to the general connectivity conditions specified under Part 1:
Provided that the energy storage systems shall comply, only with the requirements specified under clause B1 in addition to the general connectivity conditions specified under Part 1.”;
(c) In clause B2, for sub-clauses (2), (3), (4) and (5), the following clauses shall be substituted, namely:- “(2) The generating unit shall be capable of operating in the frequency range 47.5 to 52 Hz and be able to deliver rated output in the frequency range of 49.5 Hz to 50.5 Hz:
Provided that in the frequency range below 49.90 Hz and above 50.05 Hz, or, as prescribed by the Central Commission, from time to time, it shall be possible to activate the control system to regulate the output of the generating unit as per frequency response requirement as provided in sub-clause (4):
Provided further that the generating unit shall be able to maintain its performance contained in this subclause even with voltage variation of up to + 5% subject to availability of commensurate wind speed in case of wind generating stations and solar insolation in case of solar generating stations.
(3) The generating station connected to the grid, shall remain connected to the grid when voltage at the interconnection point on any or all phases dips up to the level depicted by the thick lines in the following curve, namely: — VT : Actual Voltage; Vn: Nominal Voltage—
Provided that during the voltage dip, the supply of reactive power has first priority, while the supply of active power has second priority and the active power preferably be maintained during voltage drops, provided, a reduction in active power within the plant’s design specifications is acceptable and active power be restored to at least 90% of the pre-fault level within 1 sec of restoration of voltage.
8 THE GAZETTE OF INDIA : EXTRAORDINARY [PART III—SEC. 4]
(4) The generating stations with installed capacity of more than 10 MW connected at voltage level of 33 kV and above –
(i) shall be equipped with the facility to control active power injection in accordance with a set point, capable of being revised based on directions of the State Load Dispatch Centre or Regional Load Dispatch Centre, as the case may be;
(ii) shall have governors or frequency controllers of the units at a droop of 3 to 6% and a dead band not exceeding ±0.03 Hz:
Provided that for frequency deviations in excess of 0.3 Hz, the Generating Station shall have the facility to provide an immediate (within 1 second) real power primary frequency response of at least 10% of the maximum Alternating Current active power capacity;
(iii) shall have the operating range of the frequency response and regulation system from 10% to 100% of the maximum Alternating Current active power capacity, corresponding to solar insolation or wind speed, as the case may be;
(iv) shall be equipped with the facility for controlling the rate of change of power output at a rate not more than ± 10% per minute.
(5) The generating stations of aggregate capacity of 500 MW and above shall have the provision to receive the signal from the State Load Dispatch Centre or Regional Load Dispatch Centre, as the case may be, for varying active and reactive power output.
(6) The standards in respect of the switchyard associated with the generating stations shall be in accordance with the provisions specified in respect of ‘Sub-stations’ under Part III of these Standards.
(7) The generating station connected to the grid, shall remain connected to the grid when voltage at the interconnection point, on any or all phases (symmetrical or asymmetrical overvoltage conditions) rises above the specified values given below for specified time — Over voltage (pu) Minimum time to remain connected (Seconds)
1.30 < V 0 Sec (Instantaneous trip)
1.30 > V > 1.20 0.2 Sec
1.20 > V >1.10 2 Sec V ≤ 1.10 Continuous
(8) Short Circuit Ratio at the interconnection point where the generating resource is proposed to be connected shall not be less than 5.”.
(d) For clause B3, the following clause shall be substituted, namely: — “B3. Special provision for certain Generating stations :
The generating stations commissioned before the commencement of the Central Electricity Authority (Technical Standards for Connectivity to the Grid) (Amendment) Regulations, 2018 or commissioned within six months of such commencement shall comply with the provisions of these regulations as if they were not amended.”.
5. In Part –IV, for paragraphs 2 and 3, the following paragraphs shall be substituted, namely:- “(2) (i) The distribution licensee and bulk consumer shall provide adequate reactive compensation to compensate reactive power requirement in their system so that they do not depend upon the grid for reactive power support.
(ii) The power factor for distribution system and bulk consumer shall be within ± 0.95;
(3) Voltage and Current Harmonics. - (i) The limits of voltage harmonics by the distribution licensee in its electricity system, the limits of injection of current harmonics by bulk consumers, point of harmonic measurement, i.e., point of common coupling, method of harmonic measurement and other related matters, shall be in accordance with the IEEE 519-2014 standards, as amended from time to time;
¹Hkkx IIIµ[k.M 4º Hkkjr dk jkti=k % vlk/kj.k 9
(ii) Measuring and metering of harmonics shall be a continuous process with meters complying with provisions of IEC 61000-4-30 Class A.
(iii) The data measured and metered as mentioned in sub-paragraph (ii) with regard to the harmonics, shall be available with distribution licensee and it shall also be shared with the consumer periodically.
(iv) The bulk consumer shall install power quality meter and share the recorded data thereof with the distribution licensee with such periodicity as may be specified by the appropriate Electricity Regulatory Commission:
Provided that the existing bulk consumer shall comply with this provision within twelve months from the date of commencement of the Central Electricity Authority (Technical Standards for Connectivity to the Grid) (Amendment) Regulations, 2018.
(v) In addition to harmonics, periodic measurement of other power quality parameters such as voltage sag, swell, flicker, disruptions shall be done as per relevant International Electrotechnical Commission Standards by the distribution licensee and the reports thereof shall be shared with the consumer.
(vi) The distribution licensee shall install power quality meters in a phased manner within three years from the date of commencement of the Central Electricity Authority (Technical Standards for Connectivity to the Grid) (Amendment) Regulations, 2018 covering at least 33% of the 33 kV substations each year.” P. C. KUREEL, Secy.
[ADVT.-III/4/Exty./530/18] Note: The principal regulations were published in the Gazette of India, Extraordinary, Part III, Section 4, vide notification No.12/X/STD(CONN)/GM/CEA/2018, dated the 21st February, 2007 and subsequently amended vide notification No. 12/X/STD(CONN)/GM/CEA/2018, dated the 15th October, 2013.
Uploaded by Dte. of Printing at Government of India Press, Ring Road, Mayapuri, New Delhi-110064 and Published by the Controller of Publications, Delhi-110054.
2019-02-11T19:51:11+0530 MANOJ KUMAR VERMA