刘锋;吴学智;赵宇明;刘京斗;张鹏;赵亚雪;王杰;

• 1:北京交通大学国家能源主动配电网技术研发中心
• 2:北京电动车辆协同创新中心(北京交通大学)
• 3:深圳供电局有限公司

摘要(Abstract)：

多电平逆变器广泛应用于新能源发电、交流传动等领域,而共模电压带来的漏电流不仅会导致光伏并网电流畸变,还存在一定安全问题。针对非隔离型的三相多电平光伏并网逆变器,从理论上分析了不同的三相PWM波相对位置关系可以将共模电压幅值分为0、E/3、2E/3的3种情况。进而提出可实现共模电压幅值分别为0、E/3、2E/3的3种调制策略,并且从并网电流谐波性能、共模漏电流、滤波参数3个方面比较了3种调制方式的综合性能。结果显示,在七电平逆变器中,共模电压幅值为2E/3的调制方法综合性能较好。最后通过仿真和实验对所提方法进行了验证。

关键词(KeyWords)： 非隔离;共模电压;一维空间矢量调制;多电平逆变器;漏电流

Abstract:

Keywords:

基金项目(Foundation): 中国南方电网有限责任公司科技项目(090000KK52180104)~~

作者(Author): 刘锋;吴学智;赵宇明;刘京斗;张鹏;赵亚雪;王杰;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.2291

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