摘要
为了保证统一潮流控制器的性能,维持直流侧电压的稳定至关重要,需要选取合适的电容参数。本文基于瞬时电压和电流矢量理论,首先对统一潮流控制的暂态过程进行分析,证明暂态过程中流经串联侧的有功存储为线路电感的磁场能,由此推导出电容选取的依据。然后在MATLAB中搭建含有统一潮流控制器的单机无穷大系统仿真模型,获得暂态过程的时域波形。结果表明若由直流侧电容提供暂态能量,其存储电能的变化量与线路电感的磁能变化量相同,与理论分析相吻合,为实际电容的设计提供了重要依据。
In order to guarantee the performance of unified power flow controller（UPFC）,it is essential to maintain therequired voltage at DC side and select appropriate capacitor parameter. Therefore,based on instantaneous voltage andcurrent vectors theory,a transient analysis of UPFC in power flow control is presented firstly. It is clarified that the active power flowing through the series convertor is stored in the line inductance as magnetic energy during transientstates,which derives the basis for choosing capacitor. After that,a single-machine infinite bus system model with UPFC is simulated in MATLAB,and time domain waveforms in transient states are attained. The results show that,if thetransient energy is supplied by the capacitor,the variation of electrical energy equals to that of magnetic energy in theline inductance,which coincided with theoretical analysis and can provide important basis for the design of DC-link capacitor.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2016年第7期63-67,78,共6页
Proceedings of the CSU-EPSA
基金
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA10512711205)
关键词
统一潮流控制器
暂态分析
直流侧电容
单机无穷大系统
unified power flow controller
transient analysis
DC-link capacitor
single machine infinite bus system
