Interconnection power grid primary frequency modulation responding performance assessment method

Abstract

The invention discloses an interconnection power grid primary frequency modulation responding performance assessment method, comprising steps of eliminating the affect of an AGC order through subtracting the change of the AGC order in power change of a power generator unit when the primary frequency modulation parameter and the indexes of the power generator unit are analyzed, assessing an accuracy index psi 1 of a primary frequency modulation responding characteristic, assessing a fast performance index psi 2 of the primary frequency modulation responding characteristic, assessing a stability performance index psi 3 of the primary frequency modulation responding characteristic, and assessing a robustness index psi 4 of the primary frequency modulation responding characteristic. The invention establishes the primary modulation frequency responding characteristic assessment index from four respects of accuracy, fastness, stability and robustness of the interconnection power grid primary frequency modulation control effect, provides the method for objectively evaluating the primary modulation frequency responding effect, analyzes the responding characteristics of the power grid primary modulation frequency responding characteristic. When the frequency of the interconnection power grid is changed, the power generator unit or the load spontaneously or continuously inhibits the change of the frequency.

Description

technical field [0001] The invention relates to a method for evaluating the response performance of primary frequency modulation of an interconnected power grid. Background technique [0002] The primary frequency regulation of the interconnected grid refers to the process in which the generating set adjusts the active power output to reduce the frequency deviation through the automatic adjustment action of the speed control system when the frequency of the power system deviates from the target. If the interconnected grid does not have good primary frequency response characteristics, the quasi-steady-state frequency of the system after the accident will be too low, resulting in the action of the low-cycle load shedding device, which is not conducive to the reliable operation of the system. Primary frequency regulation plays an important role in realizing automatic dispatch of power grid generation, improving power quality, and maintaining safe and stable operation of the pow...

AI Technical Summary

Problems solved by technology

[0003] The existing performance evaluation method of primary frequency modulation has the following problems: it is difficult to measure the real-time data of artificial dead zone, speed change rate, maximum load adjustment range, sluggish rate and response behavior

However, in actual operation, because many parameters cannot be obtained, it cannot be applied in practice

Images