同步发电机非同期并网引起强迫功率振荡分析  

Analysis of Power System Forced Oscillation Caused by Asynchronous Parallelizing of Synchronous Generators

作　　者：杨东俊[1,2] 丁坚勇[1] 李继升[2] 禹海峰[1] 许汉平[2] 

机构地区：[1]武汉大学电气工程学院,湖北省武汉市430072 [2]华中电力科学研究院,湖北省武汉市430077

出　　处：《电力系统自动化》2011年第10期99-103,共5页Automation of Electric Power Systems

基　　金：华中电网有限公司重点科技项目(KJ2010-0604-51)

摘　　要：对发电机非同期并网引起强迫功率振荡的机理及其特性进行了分析。通过对非同期并网的滑差分析、发电机转矩分析,结合强迫功率振荡理论,提出在发电机非同期并网过程中产生的2种低频模式下的谐波转矩可能激发系统的强迫功率振荡,即双滑差激发。通过仿真和电网的实际案例分析,进一步论证了上述理论分析的正确性。The mechanism and characteristics of the power system forced oscillation caused by generators asynchronous parallelizing are analyzed.Through sliding frequency analysis and generator torque analysis,with forced power oscillation theory,it is found that dual modes of low-frequency harmonic torque might trigger the forced power oscillation when generators are asynchronously parallelizing,known as dual modes of sliding excitation.The simulation and analysis of actual cases further validates the findings reported in the paper.

关 键 词：强迫功率振荡 非同期并网 双滑差激发 低频振荡 电力系统稳定 

分 类 号：TM341[电气工程—电机]