谭骞;徐永海;黄浩;刘海涛;吕志鹏;艾欣;

• 1:华北电力大学电气与电子工程学院
• 2:中国电力科学研究院

摘要(Abstract)：

不对称电压暂降在电网实际运行中时有发生,此时电压负序分量的出现将导致光伏逆变器输出功率波动和三相电流畸变;同时电压暂降情况下电压幅值的降低使得输出电流峰值的增大,进而给光伏系统运行带来安全隐患。为此,需进行不对称电压暂降情况下光伏逆变器输出电流峰值控制策略的研究。对目前研究较为广泛的不对称电压暂降情况下光伏逆变器控制方法进行了分析,着重研究了光伏逆变器的三相输出电流,给出了三相电流峰值和可能出现的最大电流峰值的计算方法,进而提出了限制电流峰值的方法,能够保证不对称电压暂降情况下光伏逆变器输出电流不会超出最大电流限值。仿真分析验证了所提方法的有效性。

关键词(KeyWords)： 光伏逆变器;不对称电压暂降;控制策略;电流峰值

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51277069);; 国家电网公司基础性前瞻性科技项目(PD17-14-003)~~

作者(Author): 谭骞;徐永海;黄浩;刘海涛;吕志鹏;艾欣;

Email:

DOI: 10.13335/j.1000-3673.pst.2015.03.003

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