一种电流型并网逆变器的拓扑和控制方法  

A Current Source Grid-Connected Inverter Topology and Its Control Method

作　　者：吴春华[1] 崔开涌[1] 陈国呈[1] 陈卫民[1] 肖鹏[1] 张翼[1] 

机构地区：[1]上海大学自动化系,上海市电站自动化技术重点实验室,上海200072

出　　处：《电工技术学报》2007年第8期7-12,共6页Transactions of China Electrotechnical Society

基　　金：教育部博士学科点专项基金(20060280018);上海市科委登山计划项目基金(06DZ12211)资助项目

摘　　要：提出一种基于导抗变换器的单相和三相电流型并网逆变器主电路拓扑结构及三角波-三角波脉冲宽度调制模式,详细分析了该主电路的工作原理及控制策略,推导了导抗变换器及三角波-三角波调制模式的输出特性,仿真和实验结果验证了本方案的正确性。由于本逆变器采用高频电感和高频变压器替代了传统电流型逆变器中的工频电感和工频变压器,具有控制简单,成本低,体积小,效率高等优点,并网电流不受电网电压影响,可以实现高功率因数电流源并网逆变。提出的三相并网逆变方案,相比于传统三相并网逆变器,具有系统冗余性好,抗电网波动能力强等优点。The topologies of single-phase and three-phase current source grid-connected inverter and triangle-triangle pulse width modulation method are proposed based on immittance converter. Control strategy and waveform characteristic of the inverter is analyzed. The validity and feasibility are proved by simulation and experimental results. High-frequency inductor and high-frequency transformer in the novel inverter replace the power frequency inductor and power frequency transformer in the traditional inverter. The novel inverter has the advantages of simple control, low cost, small volume and low power loss. At the same time, grid current is not influenced by grid voltage and high power factor is achieved. Compared with the traditional three-phase grid-connected inverter, the system redundancy is better and the capability of deal with grid fluctuation is stronger than before.

关 键 词：逆变器 并网 电流型 导抗变换器 

分 类 号：TM464[电气工程—电器]