电力系统自动化2025，Vol.49Issue(8)：129-137,9.DOI:10.7500/AEPS20231119001
计及功角摇摆和新能源切换特性的暂时工频过电压机理分析
Mechanism Analysis of Temporary Power Frequency Overvoltage Considering Rotor Angle Swinging and Renewable Energy Switching Characteristics
摘要
Abstract
Temporary power frequency overvoltage in power systems integrated with high proportion of renewable energy is a key factor that affects the system security and restricts the renewable energy consumption.To reveal the overvoltage mechanism for the temporary power frequency,firstly,a quasi-steady-state model for a two-machine equivalent system integrated with renewable energy is built,and the peak value of the terminal voltage of renewable energy is analytically obtained based on the phasor relationship.Secondly,employing the total differential method,the relevant relationship between the terminal voltage and the current of renewable energy is analyzed,and the influence mechanism of reactive power compensation and rotor angle swinging on the terminal voltage is clarified.Furthermore,taking the preset maximum peak value as the boundary,the optimization suggestions for the current and the upper reactive power compensation limit are proposed to provide the basic theoretical support for the safe and reliable transmission of renewable energy in large-scale composite energy transmission scenarios.Finally,the photovoltaic-thermal power bundling system and the actual composite energy sending-end system are used to carry out the simulation,and the effectiveness of the theoretical analysis is verified.关键词
暂时工频过电压/功角摇摆/新能源/切换/电流优化Key words
temporary power frequency overvoltage/rotor angle swing/renewable energy/switching/current optimization引用本文复制引用
徐式蕴,高雪峰,李宗翰,山允婧,王姝彦..计及功角摇摆和新能源切换特性的暂时工频过电压机理分析[J].电力系统自动化,2025,49(8):129-137,9.基金项目
中国电科院青年科学家项目:"新能源为主体的新型电力系统大扰动安全稳定分析理论研究"(XT83-22-001). This work is supported by Young Scientist Project of the China Electric Power Research Institute(No.XT83-22-001). （XT83-22-001）
