负荷等效为恒功率模型对电力系统暂态稳定分析的影响  

Load Equivalent to Constant Power Model Affects Power System Transient-State Stability

作　　者：林富洪[1] 隋佳音[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《电网与清洁能源》2008年第7期30-33,共4页Power System and Clean Energy

摘　　要：在电力系统暂态稳定分析过程中,针对传统方法将负荷用恒阻抗表示存在着若干不足的问题,将负荷用恒功率模型表示,研究负荷等效为恒功率模型后的发电机转子运动方程,介绍暂态能量函数法。对4机11节点系统进行仿真计算,仿真结果表明将负荷用恒功率模型表示的方法具有解决保守性问题、缩短极限切除时间、改善仿真结果误差等优点。In view of the traditional method that uses the permanent impedance model to show the load in the transient stability analysis process of the power system has some flaws, a method of using the constant power model to replace the load model is considered in this paper. The generator＇s equation of motion is studied when the load model is exchanged by constant power, and transient energy function is introduced. Simulation results of four-generator and 11 nodes systems illustrated the validity of the method and suggested that the method can solve the conservative property problem, and can shorten the fault clearing time and improve the simulation result errors.

关 键 词：恒功率模型 暂态稳定 暂态能量函数 电力系统 

分 类 号：TM712[电气工程—电力系统及自动化]