摘要
为了有效利用太阳能,缓解供电压力,本文提出了适用于家用的3kW小功率单相光伏并网发电系统的设计方案;介绍了光伏并网逆变系统的组成;通过理论分析、计算确定了各部分电路主要元器件的参数;采用电流跟踪的控制策略设计了PI控制的电压、电流双闭环控制系统;利用MATLAB仿真软件对系统进行了建模、仿真。通过仿真实验,验证了该系统能在光照扰动的情况下迅速的跟踪最大功率点,系统并网电流能与电网电压保持同频同相,实现高功率因素的并网要求。
In order to effectively utilize solar energy and alleviate the pressure of the power supply,this paper put forward a scheme which suitable for household 3kW single-phase grid-connected photovoltaic inverter system.The main components parameters of each part of circuits were determined by theory analysis and calculation.And double closed loop control system was designed using the current tracking control strategy.The model of whole system is presented by MATLAB.Simulation experiments proved that this system could rapidly track the maximum power point in the case of light disturbance and the output current of this system could change to follow with power grid voltage.Two parameters keep the same frequency and same the phase.The whole system achieved high power factor to the grid.
出处
《国外电子测量技术》
2016年第2期94-97,共4页
Foreign Electronic Measurement Technology
基金
陕西省教育厅科研(14JK1865)
榆林学院高层人才科研启动基金(14GK33)项目
关键词
并网逆变
LC滤波器
双闭环控制
仿真
grid-connected inverter
LC filter
double-loop controller
simulate
