适用于继电保护的含变流器电力元件故障暂态快速仿真方法  

Rapid fault transient simulation of electric elements with converter for relay protection

作　　者：申全宇 宋国兵[1] 王晨清[1] 刘凯 王欢欢[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049 [2]ABB(中国)有限公司研究中心,北京100015

出　　处：《电力自动化设备》2015年第8期90-94,130,共6页Electric Power Automation Equipment

基　　金：国家重点基础研究发展计划(973计划)资助项目(2012CB215105)~~

摘　　要：针对含变流器电力元件详细模型仿真计算量大、仿真规模和仿真速度难以提高的问题,给出一种适用于继电保护的故障暂态快速仿真的方法。基于对变流器的功能和控制策略的分析,忽略变流器复杂的内部结构,仅保留其功能与控制特性,根据有功功率守恒得出其简化数学模型,最后对简化模型方程进行离散化,得到含变流器电力元件的输出工频分量的迭代方程。该方法避免了在仿真模型中大量使用分立的电力电子器件及其触发环节,从而简化了仿真模型的复杂程度,大幅降低了变流器环节的仿真计算量,提高了仿真速度。PSCAD仿真结果验证了该方法的有效性和快速性。Since the detailed model simulation of electric elements with converter has great calculation load,its scale and speed could not be easily enhanced,aiming at which,a rapid fault transient simulation method is proposed for relay protection. The functions and control strategy of converter are analyzed and its simplified mathematical model is obtained based on the active power conservation law,which keeps its functions and control characteristics and neglects its internal complex structure. By discretizing the simplified model equations,the iterative equations of output power-frequency components are obtained for the electric elements with converter. The proposed method avoids the use of plentiful separated power electronic devices and trigger units, which reduces the complexity of simulation model, lowers the computational load of converter simulation and enhances the simulation speed. Its feasibility and rapidity are verified by the results of PSCAD simulation.

关 键 词：变流器 电力元件 暂态 仿真 大规模系统 继电保护 模型 

分 类 号：TM77[电气工程—电力系统及自动化] TM743