微网中并联逆变器的环流控制方法

发布时间：2018-02-09 07:36

本文关键词： 微网并网逆变器环流零序电压无差拍控制　出处：《中国电机工程学报》2014年19期 　论文类型：期刊论文

【摘要】：环流抑制是逆变器可靠并联运行的关键技术,针对微电网中的共直流母线冗余并网逆变器的并联运行,提出了一种基于零序电压差补偿原理的零序环流控制方法。首先分析了并联逆变器间零序环流等价模型,根据单台逆变器的零序电流反馈量和无差拍电流控制方法直接得到并联逆变器间的零序电压差补偿量。然后通过调节该单台逆变器的零序电压使并联逆变器间的零序电压差接近零,实现抑制零序环流的目标。最后,仿真和实验结果验证了所提零序电压差补偿原理和零序环流控制方法的有效性。
[Abstract]:Loop suppression is the key technology for reliable parallel operation of inverters, aiming at the parallel operation of common-DC bus redundant grid-connected inverters in microgrid. A zero-sequence circulation control method based on the principle of zero-sequence voltage difference compensation is proposed. Firstly, the equivalent model of zero-sequence circulation between parallel inverters is analyzed. According to the zero sequence current feedback of single inverter and the control method of non beat current, the zero sequence voltage difference compensation between parallel inverters is obtained directly. Then, by adjusting the zero sequence voltage of the single inverter, the zero sequence voltage between parallel inverters is obtained. Zero sequence voltage difference is close to zero, Finally, the simulation and experimental results verify the effectiveness of the proposed zero-sequence voltage difference compensation principle and zero-sequence circulation control method.
【作者单位】：国家电能变换与控制工程技术研究中心(湖南大学);
【基金】：国家自然科学基金重点项目(51237003) 教育部新世纪优秀人才支持计划项目NCET-10-0367) 湖南省研究生科研创新项目(CX2013B162)~~
【分类号】：TM464

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