新型静止无功发生器(ASVG)的研究现状

Advanced shunt var generator(ASVG) present situation

根据国内外资料和作者在我国第一台３００ｋＶＡ静止无功发生器（ＡＳＶＧ）开发过程中的经验对ＡＳＶＧ的研究现状，存在问题和发展趋势从装置建模、控制策略和主电路结构方面进行了详细的分析与讨论。着重研究了系统不对称对ＡＳＶＧ的影响，并提出了一种基于ＬＣ并联谐振滤波器的方法以改善ＡＳＶＧ在电网电压不对称条件下的运行状况。

? Based on the literature search and their experience in the development of a 300 kvar prototype advanced shunt var compensator, the authors give an overview of the current practices and the trend of technological advances in ASVG over the last two decades. Different ASVG modeling methods, control strategies, and main circuit configuration are described and their respective merits and shortcoming are explained. The behaviors of ASVG under unbalanced input voltage conditions are studied in particular and the effectiveness of different suppression approaches are investigated. The authors suggest that an LC shunt resonant filter be a simple and effective approach for suppressing the second harmonic ripple of DC intermediate voltage and improving the performance of ASVG under unbalanced network state. The paper provides a quick reference for the practising researcher to decide which methods should be considered for developing a GTO based static var compensator(SVC). 