新型直流输电系统谐波对旋转电机的影响  

Rotary Motor's Influences by Harmonics in the Novel DC Transmission System

作　　者：罗隆福[1] 兰丽霞[1] 李勇[1] 许加柱[1] 雷园园[1] 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082

出　　处：《电力系统及其自动化学报》2010年第1期48-53,共6页Proceedings of the CSU-EPSA

基　　金：湖南省"十一五"重大科技专项(06GK1003-1);实用新型专利号(ZL200320124015.6);发明专利公开号(CN1553553A)

摘　　要：传统的高压直流输电系统一般在换流站交流网侧布置滤波兼无功补偿的装置,谐波与无功功率通过换流变压器回馈网侧时不仅会对变压器,同时也会对发电机产生不良影响。为此,以新型直流输电系统为平台,将传统的滤波和无功补偿装置移至阀侧第三绕组侧,利用变压器耦合绕组的谐波安匝平衡,使谐波电流与网侧隔离开来,并通过动态模拟实验,分析未接入滤波器和接入滤波器时,新型直流输电系统下谐波所引起的发电机的损耗和效率。结果表明,新型直流输电系统在改善发电机输出端电压和电流正弦波形的质量,提高发电机的额定出力方面具有独特的优越性。In the traditional high voltage direct current system, the filters and reactive power compensating equipments are always placed in the AC net side of the converter. It cannot overcome the had effects not only to the transformer but also to the generator when the harmonics and reactive power flows into the AC net through the converter transformer. It moves the traditional filters and reactive power compensating equipments to the third windings of valve side in the novel inductive filtering technology, that using the ampere-turn balance of the transformer＇s coupled windings isolates harmonic current from net side. This article analyzes the loss and efficiency of generator cased by harmonics with filter and without filter in the novel DC transmission system. Finally, by dynamic simulation experiment and analyzing the result, it indicates that the novel system has its unique advantage of improving the quality of voltage and current in the fan-out of generator and increasing rated export for generator.

关 键 词：新型换流变压器 直流输电 感应滤波 发电机 谐波损耗 

分 类 号：TM76[电气工程—电力系统及自动化]