大型短路试验发电机运行性能仿真  

Operation Performance Simulation of Large Short Circuit Test Generator

作　　者：黄浩[1] 胡刚[1] 张建涛[1] 朱志佳 HUANG Hao;HU Gang;ZHANG Jiantao;ZHU Zhijia(Harbin Electric Machinery Company Limited,Harbin 150040,China)

机构地区：[1]哈尔滨电机厂有限责任公司,哈尔滨150040

出　　处：《大电机技术》2021年第2期32-37,58,共7页Large Electric Machine and Hydraulic Turbine

摘　　要：短路试验发电机主要用于为高压断路器型式试验提供供电电源,它的运行工况相当于常规发电机的突然短路故障。由于电流冲击很大,远远超过普通发电机的短路电流,其瞬时损耗很大。本文研究的短路试验发电机工作频率为100Hz,其发热更为严重,不能完全照搬以往50Hz电机的设计方法,需要更为精确与细致的研究。本文采用场路耦合的时步有限元法,对短路试验发电机的整个运行工况进行了仿真,计算获得了定子电流、转子电流以及定子铁芯、转轴、阻尼条和转子槽楔更为精确的损耗分布,为进一步评价电机各部分的发热情况奠定了基础。The short circuit test generator is used to provide power supply for the type test of high voltage circuit breaker.Its operation condition is equivalent to the sudden short circuit fault of conventional generator.Because of the high current shock which is far more than the short circuit current of ordinary generator,instantaneous loss is very large.The heating is more serious as the frequency of the generator studied in this paper is 100 Hz.It can’t use the design method of 50 Hz generator completely,and it needs more accurate and detailed research.In this paper,the field circuit coupled time-step finite element method is used to simulate the whole working condition of the short circuit test generator.The stator current and rotor current,as well as the accurate loss distribution of the stator core,the shaft,the damping bars and the rotor wedges are calculated,which provided for further evaluation of the heating condition of each part of the generator.

关 键 词：短路试验发电机 运行性能 损耗 场路耦合 有限元 

分 类 号：TM301.4[电气工程—电机]