摘要
介绍了电能质量综合补偿器 ( UPQC)的运行机理、检测方法、控制策略以及既能补偿电网畸变电压又能抑制负载畸变电流的功能优势 ,指出了 UPQC在动态补偿电压跌落和浪涌时的功能局限 ,通过对 UPQC串联部分脉宽调制 ( PWM)技术的分析研究 ,提出了在电压跌落和浪涌期间根据电压畸变量的变化幅度动态地调节三角载波幅值的PWM控制新策略。
In this paper,the operation principle,detection method and control strategy of Unified power quality compensator (UPQC) are introduced,which is able to compensate for both the source voltage and load current at the same time.What's more,the limitation of the UPQC compensating for voltage sags and swells is pointed out.After analyzing the PWM principle of the UPQC,the paper brings out a new improved PWM strategy which can dynamically adjust the amplitude of the triangle wave during the voltage sags or swells.Simulation result verifies the correctness of analysis and the validity of the design.
出处
《电力系统及其自动化学报》
CSCD
2003年第4期19-23,共5页
Proceedings of the CSU-EPSA
