Method and system for determining filtering factor of hydro-thermal power frequency division control AGC system

A filter factor, water and thermal power technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2020-09-11
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] The present invention proposes a method and system for determining the filter factor of the AGC system for hydrothermal power frequen...

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Embodiment approach

[0061] In May 2019, Chongqing, Hubei and Rouzhou were directly put into operation, and the Southwest Power Grid and the main grid operated asynchronously. The frequency problem replaced the power angle problem and the voltage problem as the main influencing factor for the safe and stable operation of the power grid. In order to give full play to the secondary frequency regulation capability of the system, take advantage of the advantages of rapid hydropower regulation and thermal power regulation stability, and avoid the shortcomings of hydropower over-regulation due to delay effects and thermal power regulation speed too slow, frequency division is adopted for AGC units in the jurisdiction according to different types control.

[0062] The asynchronous operation time of the Southwest Power Grid is relatively short, and the characteristics of the power grid are quite different from those before the asynchronous operation. It is difficult to set the filter factors of hydrotherma...

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Abstract

The invention discloses a method and a system for determining a filtering factor of a hydro-thermal power frequency division control AGC system, and the method comprises the steps: setting a power grid to be in a non-frequency division adjustment mode, determining a thermal power generating unit frequency modulation filtering factor alternative value according to a steady-state frequency modulation result, and determining a hydro-thermal power generating unit frequency modulation filtering factor alternative value according to a disturbance frequency modulation result; setting the power grid to be in a frequency-division adjusting mode; setting a filtering factor of the AGC system according to the current alternative value of the thermal power generating unit frequency modulation filteringfactor and the alternative value of the hydroelectric generating unit frequency modulation filtering factor; and performing a simulation test to obtain a secondary frequency modulation result of theAGC system to the power grid in the frequency division regulation mode, and determining the optimal value of the filter factor of the hydro-thermal power frequency division control AGC system according to the secondary frequency modulation result. According to the method, the filtering factor of the AGC system is accurately and efficiently determined through a simulation means, the dependence of parameter configuration on previous operation experience of a previous power grid is reduced, an optimal solution can be quickly given, the optimal frequency modulation performance of the frequency modulation unit is fully exerted, and the trial and error cost during trial operation is reduced.

Description

technical field [0001] The present invention relates to the technical field of power grid control, and more specifically, to a method and system for determining a filter factor of an Automatic Generation Control (AGC) system for hydrothermal power frequency division control. Background technique [0002] In May 2019, Chongqing, Hubei and Rouzhou were directly put into operation, and the Southwest Power Grid and the main grid were interconnected only by DC, running asynchronously with the main grid, and the system frequency was decoupled from the main grid. Affected by factors such as the high proportion of hydropower and the sharp decrease in load level, frequency stability has replaced voltage and power angle stability as the key factors affecting the safe and stable operation of Southwest Power Grid. In order to improve the frequency operation level of the system and give full play to the frequency modulation capability of the units participating in the secondary frequency...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/24
CPCH02J3/466H02J3/241H02J2203/20
Inventor 李勇肖雄兰强常晓青宋新立何笠苏志达王民昆戴汉扬罗卫华吴国旸刘涛
Owner CHINA ELECTRIC POWER RES INST
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