负荷按容分配的无线并联逆变系统收敛性分析  

Convergence of the Wireless Parallel Inverter System with Volume-based Load Sharing

作　　者：刘斌[1] 卢雄伟 熊勇[1] 谢积锦[3] 伍家驹[1] 

机构地区：[1]南昌航空大学信息工程学院,南昌330063 [2]科华恒盛股份有限公司,厦门361006 [3]钦州学院物理与电子工程学院,钦州535000

出　　处：《电工技术学报》2015年第21期90-98,共9页Transactions of China Electrotechnical Society

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

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。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.

关 键 词：无线并联 微电网 下垂控制 收敛性分析 按容分配 

分 类 号：TM464[电气工程—电器]