考虑补偿策略的动态电压恢复器补偿量检测方法  

Compensation detection of dynamic voltage restorer considering compensation strategies

作　　者：张永平[1] 李鹏[1] 李和明[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定071003

出　　处：《电力自动化设备》2006年第1期8-12,共5页Electric Power Automation Equipment

基　　金：国家电力公司重点科研项目(SP11-2002-01-09);华北电力大学博士学位教师科研基金项目(20041201)~~

摘　　要：电压补偿量的检测是影响动态电压恢复器(DVR)实时性和补偿精度的关键环节。为了进一步提高DVR的补偿性能,针对用户对补偿策略选取的不同,通过引入目标电压函数,提出改进d-q变换法对电压补偿量进行检测。该方法考虑到电压相位跳变、衰减直流分量、谐波和三相不对称等复杂情况的存在,可以对系统电压跌落的起止时刻、跌落幅值和相位跳变角实时检测,并结合补偿策略直接检测出需要的电压补偿量。通过仿真分析对所提方法的正确性及应用于DVR中的有效性进行了验证。The detection of voltage compensation is the key factor influencing its real-time performance and compensation accuracy of DVR（Dynamic Voltage Restorer）. An improved d-q transform method is presented to further improve its compensation performance according to different compensation strategies of DVR by introducing the object voltage function. It real -timely detects the voltage sag duration,falling magnitude and phase-angle jump,considering decaying DC component,harmonics,unbalanced three-phase voltage and so on. Combined with compensation strategies,it detects the voltage compensation directly. Its validity and effectiveness in DVR are testified successfully by simulation analysis.

关 键 词：动态电压恢复器 改进d-q变换法 补偿策略 电压补偿量 目标电压函数 

分 类 号：TM761[电气工程—电力系统及自动化] TM930