变速抽水蓄能机组暂态无功支撑能力提升及关键参数优化

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中图分类号：TM346 文献标志码：A 文章编号：1007-449X（2025）04-0001-11

Improvement of transient reactive power support capability and key parameters optimization of variable-speed pumped storage unit

JIA Yihang1， XU Guorui1，LU Weifu²，GUI Zhonghua²，LI Shanying³ （1.School of Electrical and Electronic Engineering，North China Electric Power University，Beijing 1022O6，China; 2.Pumped-storage Technological &Economic Research Institute，State Grid Xinyuan Company Ltd.，Beijing 10O761，China; 3.Electric Power Research Institute，State Grid Jibei Electric Power Company Ltd.，Beijing 1O0045，China）

Abstract ： With the increasing proportion of wind power，photovoltaic and other new energy，the issues of insuffcient transient reactive power support capability and voltage stability of the power system are increasingly obvious. The variable-speed pumped storage unit （VSPSU） can quickly adjust the magnitude and direction of the rotor magnetic field to provide bi-directional transient reactive power support for the power grid，which are of vital significance for improving the voltage stability of the new energy power grid.In order to study the transient reactive power support capability and key influence parameters of the VSPSU，the effective gain of reactive current was derived and established as an evaluation index to quantitatively describe the transient reactive power support capability； Through frequency-domain sensitivity analysis of the eective gain of reactive current，the influence of body parameters and control parameters on the transient reactive power support capability of the VSPSU was investigated，and the key parameters and their optimization directions were obtained；A coupled model of the VSPSU and its excitation system was established，and the transient operation characteristics of the VSPSU under severe voltage fault of the power system were investigated，revealing the influence laws of the body and control parameters on the transient reactive power support capability.The research results can provide technical support for improving the voltage stability of the new energy power grid.

Keywords：variable-speed pumped storage unit； transient reactive power support capability； effectivegain of reactive current； frequency-domain sensitivity analysis； parameter optimization

0引言

随着“双碳”战略目标的推进，我国能源结构改革和低碳转型正在全面提速，以新能源为主体的新型电力系统将成为我国未来电网发展的重要特征。（剩余16177字）