5kW光伏并网发电系统及其仿真研究  

Simulation research on 5kW photovoltaic grid-connection system

作　　者：袁晓玲[1] 范发靖[1,2] 周素梅[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京210024 [2]南京亚派科技实业有限责任公司,江苏南京210000

出　　处：《电子设计工程》2011年第22期140-143,共4页Electronic Design Engineering

摘　　要：随着新能源发电的迅速发展,越来越多的可再生能源被转化为电能并通过并网逆变器输送到电网。利用MATLAB仿真工具箱建立了由光伏阵列输出、Boost升压电路、逆变器、控制器、电网等组成的5 kW光伏并网发电系统的仿真模型,研究了光伏并网系统的特性。采用变结构模糊PID控制器实现5 kW光伏发电系统的MPPT;采样电网电压作为逆变器电流的参考信号,利用滞环比较法控制逆变器,实现系统输出电流与电网电压同频同相,功率因素近似为1。仿真结果表明,系统较好地实现了光伏发电系统的MPPT及安全并网,对实际光伏并网系统的设计有参考意义。With the rapid development of new energy resources,more and more renewable energy was feed into electrical grid by inverter.Using MATLAB/Simulink tool box,a simulation model of 5 kW photovoltaic grid-connection with PV array output,Boost circuit,inverter,controller and electrical grid is constructed.Characteristics of PV grid-connection system based on the simulation model are researched.Adopting variable structure fuzzy PID controller,the 5 kW PV system achieves MPPT.Sampling grid voltage as reference voltage of inverter and using hysteresis comparison method,the system output current has the same phase and frequency with grid voltage and has unit power factor.Simulation results reveal the 5 kW PV system has the MPPT and can be connected to grid safety.The simulation model has reference value for practical PV system design.

关 键 词：光伏并网 变结构模糊PID控制 MPPT 滞环比较 

分 类 号：TK513[动力工程及工程热物理—热能工程]