负荷按容分配的无线并联逆变系统收敛性分析

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摘要对于非同等功率等级的逆变器无线并联系统而言,因为均分系统负荷可能导致小容量逆变器无法工作,所以必须让负荷按照正比于逆变器模块容量的方式实现分配。围绕下垂控制原理,通过对输出电压幅值和频率进行收敛性分析,推导出逆变负荷按容分配的充分条件,这一充分条件对下垂控制系数的确定具有很好的指导作用。此外,通过引入虚拟阻抗法和双环调节器,搭建了由两台不同容量的逆变器组成的微电网系统。最后通过仿真和实验验证了该理论分析的有效性。

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	刘斌
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	伍家驹

关键词 ：无线并联, 微电网, 下垂控制, 收敛性分析, 按容分配

Abstract：For the wireless paralleled inverters with different capacity,to equally share system load may make smaller capacity inverters work abnormally.As the result,the system load should be shared in proportion to the inverter’s capacities.Based on the droop control principle,this article has deduced the sufficient conditions of proportionally load sharing through the convergence analysis of the amplitude and frequency of the output voltage.The conditions can be used as a guideline for designing the droop control coefficients.Then a micro-grid system is set up with two parallel connected inverters with different capacities.And the virtual impedance method combined with the double loop controller is adopted.Finally,the effectiveness of the proposed analysis is verified through the simulation and experiment.

Key words： Wireless parallel micro-grid droop control convergence analysis sharing by volume

收稿日期: 2014-12-29 出版日期: 2015-11-12

PACS:

TM464

基金资助:国家自然科学基金(61463037)、江西省教育厅科技项目(GJJ14531)和江西省科技支撑计划(2010BGA01000)资助。

通讯作者: 刘斌男,1975年生,博士,副教授,研究方向为电力电子控制、预测控制和新能源技术等。

作者简介: 卢雄伟男,1989年生,硕士研究生,研究方向为电力电子分析与控制。

引用本文:

刘斌,卢雄伟,熊勇,谢积锦,伍家驹. 负荷按容分配的无线并联逆变系统收敛性分析[J]. 电工技术学报, 2015, 30(21): 90-98. Liu Bin,Lu Xiongwei,Xiong Yong,Xie Jijin,Wu Jiaju. Convergence of the Wireless Parallel Inverter System with Volume-based Load Sharing. Transactions of China Electrotechnical Society, 2015, 30(21): 90-98.

链接本文:

https://dgjsxb.ces-transaction.com/CN/Y2015/V30/I21/90

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