动态电压恢复器的电压跌落综合补偿策略研究  

Study on voltage sags compensation strategy for dynamic voltage restorer

作　　者：克长宾[1] 李永丽[1] 

机构地区：[1]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电力系统保护与控制》2012年第17期94-99,共6页Power System Protection and Control

基　　金：国家重点基础研究发展计划(973)资助项目(2009CB219704);国家自然科学基金资助项目(50607014;50977061)~~

摘　　要：动态电压恢复器可以经济、有效地解决电压跌落问题,补偿策略决定了其补偿效果。对于持续时间、跌落特点各不相同的电压跌落,单一的补偿方法往往难以同时兼顾补偿质量和补偿时间。分析了三种基本补偿方法的优缺点及电压跌落特性,提出了一种基于跌落前电压补偿法和最小能量补偿法的综合补偿策略。该补偿策略根据电压跌落的持续时间及特点自动调用适当的补偿方法,既保证了补偿质量,又在需要时延长了补偿时间。给出了该综合补偿策略的实现方法并予以仿真验证,结果表明该策略具有良好的补偿效果和可行性。Dynamic voltage restorer can cost-effectively mitigate voltage sags, and its effect is determined by compensation strategy. For different durations and characteristics of voltage sags, a single compensation strategy is difficult to simultaneously consider the compensation quality and duration. Three basic compensation methods and characteristics of voltage sags are analyzed, and then a generalized compensation strategy based on pre-fault and minimum energy compensation is proposed. The strategy can automatically adopt appropriate compensation method according to voltage sag＇s duration and characteristics. Thus the compensation quality is ensured and the compensation duration is extended if necessary. The implementation method is then suggested. Simulation results demonstrate the efficacy and operability of the proposed compensation strategy.

关 键 词：电压跌落 动态电压恢复器 综合补偿策略 跌落前电压补偿法 最小能量补偿法 

分 类 号：TM761.1[电气工程—电力系统及自动化]