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.
出处
《电力系统及其自动化学报》
CSCD
北大核心
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)
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
novel converter transformer
DC transmission
inductive filtering
generator
harmonics loss
作者简介
罗隆福（1962-），男，教授，博士生导师，中国电机工程学会高级会员，主要从事现代电器设备的设计与优化、新型换流变压器的研制及对应的高压直流输电新理论研究工作。Emait：llf@hnu．cn
兰丽霞（1982-），女，硕士研究生，主要从事基于感应滤波技术的高压直流输电系统新理论与谐波抑制与无功补偿的研究。Email：lanlixia1982@126．com
李勇（1982-），男，博士研究生，主要从事基于新型换流变压器的直流输电新理论及谐波抑制与无功补偿研究。Email：goodliyong@hotmail．com
