电网谐波电压对同步调相机转子损耗的影响  

The Influence of Harmonic Voltages on Rotor Loss of Synchronous Compensator

作　　者：许国瑞[1] 李金香[2] 吴国栋 孙玉田[2] 康锦萍[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]水力发电设备国家重点实验室(哈尔滨大电机研究所),哈尔滨150040

出　　处：《大电机技术》2018年第1期28-33,共6页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金资助项目(51507059);中央高校基本科研业务费专项资金资助(2018MS10)

摘　　要：高压直流输电系统单极大地回线运行会使得附近变压器产生直流偏磁现象,增加变压器副边电压的谐波含量。当变压器与为换流站提供无功支撑的同步调相机连接时,谐波电压会影响同步调相机的转子损耗。本文针对不同谐波电压下,同步调相机转子损耗的变化展开研究。采用时步有限元法计算了同步调相机空载、进相以及迟相运行条件下,谐波电压对转子铁心和槽楔损耗的影响,对比分析了转子各部分损耗大小随电压谐波次数的变化规律。研究结果为同步调相机的安全可靠运行提供了理论基础。When the HVDC system operates in a mono-polar earth return line, the nearby electrical transformers are affected by DC bias phenomenon which will generate harmonic components in the secondary voltage of the transformer. The synchronous compensator which provides the reactive power for the converter station is connected to the electrical transformers, the harmonic voltage will affect the rotor loss of the synchronous compensator. In this paper, the effects of different harmonic voltages on the rotor losses of synchronous compensator are studied. The influence of different harmonic voltages on the loss of rotor core and slot wedge under no-load, leading phase and lagging power factor operation are calculated based on time-stepping finite element method. The results provide a theoretical basis for the safe and stable operation of the synchronous compensator.

关 键 词：同步调相机 转子损耗 谐波电压 直流偏磁 

分 类 号：TM342[电气工程—电机]