一种基于固态变压器的光伏发电并网技术  

Grid-connected photovoltaic power generation technology based on SST

作　　者：张明锐[1] 林承鑫[1] 徐瑞新 

机构地区：[1]同济大学电子与信息工程学院,上海201804 [2]上海华艾软件有限公司,上海200436

出　　处：《电力系统保护与控制》2012年第19期133-138,共6页Power System Protection and Control

基　　金：教育部留学回国人员科研启动基金资助项目(08002410012);中央高校基本科研业务费专项资金资助(0800219169)

摘　　要：提出一种基于固态变压器的高电压、大功率的光伏发电并网方式。使用S-FunctionBuilder函数建立光伏电池的仿真模型,采用改进的扰动观察法实现最大功率点跟踪,并网时采用电压源输入,电流输出的控制方式,通过固态变压器接入10kV交流电网。该方案并网冲击电流小,响应速度快,具有良好的抗干扰性。仿真结果表明,基于固态变压器的光伏并网系统能保证直流侧电压稳定,实现网侧电流正弦化且为单位功率因数。A high voltage power grid-connected photovolta!c power system based on solid state transformer （SST） is proposed. The simulation model of photovoltaic cells is established with the S-Function Builder. MPPT is realized with the improved perturbation and observation （Improved P＆O）. It is connected to the 10 kV AC grid by SST, through the control mode of using voltage source as input and current as output. This mode has the advantages of small surge current, fast response and excellent performance of anti-interference. The simulation results prove that the grid-connected photovoltaic power system can maintain DC voltage stability and realize sinusoidal current and unity power factor.

关 键 词：光伏并网系统 S函数模型 改进扰动观察法 固态变压器 

分 类 号：TM615[电气工程—电力系统及自动化]