电力系统电压暂降分析计算方法综述

A SURVEY ON CALCULATION AND ANALYSIS METHODS OF VOLTAGE SAG

随着现代化电力电子设备的广泛应用,电压暂降(voltage sag)已日益成为电力部门和用户所关注的电能质量问题。文章介绍了电压暂降的基本概念,指出分析计算电压暂降的重要性,将目前所采用的分析计算方法归纳为统计法、随机预估法和电磁暂态分析法,并综述了各种分析计算方法的基本思想、理论成果和应用情况,特别强调了采用电磁暂态分析电压暂降过程的的重要性,最后提出一些值得深入探讨的问题。

With the wide application of modern power electronics equipments, more and more attention from both electrical engineers and customers are increasingly paid to the voltage sag as one of the power quality problems. Here, the basic concept on voltage sag is presented, the importance of analyzing voltage sag is pointed out and the presently used analysis and calculation methods for voltage sag are reduced to statistical assessment, stochastic prediction and electromagnetic transient analysis. The fundamental thought, achievements of theoretical study and application situation of these methods are summed up, the importance of analyzing voltage sag by electromagnetic transient analysis method is especially emphasized. Finally, some problems which are worth in-depth exploring are put forward.