Analysis of the Influence of Impedance Ratio on Critical Short Circuit Ratio of New Energy Grid Connection Points
Short circuit ratio is currently an effective indicator for measuring the voltage support strength of AC/DC systems.However,under the premise of selecting a certain base value,the short circuit ratio is a parameter expressed only by the modulus of the system's equivalent impedance.From the equations of actual systems,it can be seen that the stability of AC/DC power systems is not only related to the modulus of Thevenin's equivalent impedance,but also closely related to the impedance phase angle,Analyzing the relationship between critical short circuit ratio and impedance ratio is of great significance for guiding new energy access engineering.This paper studies the relationship between impedance ratio,maximum transmission power,and AC system parameters,derives the relationship between critical short circuit ratio and impedance ratio,and provides guidance for using impedance ratio as an auxiliary criterion to judge the strength of the power grid in engineering.
Short circuit ratioCritical short-circuit ratioNew energy grid connectionMaximum power transmission
万方数据
维普
