THE MINISTRY OF
INDUSTRY AND TRADE ------------- No. 30/2019/TT-BCT | THE SOCIALIST REPUBLIC OF VIETNAM Independence - Freedom – Happiness
------------------ Hanoi, November 18, 2019 |
CIRCULAR
Amending and supplementing a number of articles of the Circular No. 25/2016/TT-BCT dated November 30, 2016 of the Ministry of Industry and Trade on regulations on electricity transmission system and Circular No. 39/2015/TT-BCT dated November 18, 2015 of the Minister of Industry and Trade on regulations on electricity distribution system
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Pursuant to the Law on Electricity dated December 3, 2004 and the Law dated November 20, 2012 amending and supplementing a number of articles of the Law Electricity;
Pursuant to the Government's Decree No. 98/2017/ND-CP dated August 18, 2017 defining the functions, tasks, powers and organizational structure of the Ministry of Industry and Trade;
Pursuant to the Government's Decree No. 137/2013/ND-CP dated October 21, 2013 detailing the implementation of a number of articles of the Law on Electricity and the Law amending and supplementing a number of articles of the Law on Electricity;
At the request of the Director of Electricity Regulatory Authority;
The Minister of Industry and Trade promulgates the Circular amending and supplementing a number of articles of Circular No. 25/2016/TT-BCT dated November 30, 2016 of the Ministry of Industry and Trade on regulations on electricity transmission system and Circular No. 39/2015/TT-BCT dated November 18, 2015 of the Minister of Industry and Trade on regulations on electricity distribution system
Article 1. Amending and supplementing a number of articles of Circular No. 25/2016/TT-BCT dated November 30, 2016 of the Ministry of Industry and Trade on regulations on electricity transmission system
1. Adding Clause 5a following Clause 5, Clause 6a following Clause 6 of Article 3 as follows:
“5a. Rated capacity of a power plant is the total rated capacity of the generating sets in such power plant in stable and normal operation mode and declared by the manufacturer in the design description of the generating sets. For solar power plants, the rated capacity of a solar power plant is the maximum alternating electric power of such plant that can be calculated and announced in line with the planned DC capacity of such solar power plant.
6a. DIM (Dispatch Instruction Management) is the information management system of dispatch instruction between the dispatching level with control authority and the power plant or the Control Center of power plants.”
2. Amending Clauses 10, 35, 49 and 53 of Article 3 as follows:
“10. Frequency adjustment in an electricity system (hereinafter referred to as frequency adjustment) is an adjustment process in an electricity system to maintain the stable operation of such system, including primary frequency adjustment, secondary frequency adjustment, and tertiary frequency adjustment:
a) Primary frequency adjustment is the process of adjusting electricity system frequency immediately by a large number of generating sets equipped with a governor.
b) Secondary frequency adjustment is the adjustment process following the primary frequency adjustment carried out through the impact of AGC system to keep the frequency within the permissible long-term working band.
c) Tertiary frequency adjustment is the adjustment process following the secondary frequency adjustment carried out by a dispatch instruction to keep the electricity system frequency operating stably according to current regulations and ensure economical distribution of generating capacity among generating sets.
35. Short-term flicker perceptibility (Pst) and long-term flicker perceptibility (Plt) are values calculated according to current National Standards. In case the Pst and Plt values are not included in the National Standards, they shall be calculated according to the current IEC Standards published by the International Electrotechnical Commission.
49. PSS (Power System Stabilizer) is a device that injects additional signals into the automatic voltage regulator (AVR) to decrease voltage fluctuation in the electricity system.
53. Automatic load shedding is the act of automatically cutting loads by relays in accordance with the signals of frequency, voltage or transmission power of the electricity system when such frequency, voltage or transmission power level drops below the permissible limits calculated by the electricity system and market operator.”.
3. Amending Article 7 as follows:
“Article 7. Phase balance
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