基于TMS320F2812光伏并网SVPWM逆变系统的设计

针对传统电力系统中SPWM调制的逆变器效率低、可靠性差等缺点,提出了将SVPWM技术应用于光伏并网逆变器中,并在Matlab/Simulink环境下对逆变主电路进行了仿真。同时以TMS320F2812为主控芯片,三相逆变模块为主电路,在SVPWM逆变调制技术的基础上,引入单神经元PI电压闭环控制技术来改善并网逆变器的输出波形,并研制了一台220 V/50 Hz的并网逆变器样机。仿真结果表明,设计方案的可行性和有效性,样机结果表明,该并网逆变器具有硬件电路简单,输出电压谐波畸变率低,电压稳定等优点。

The Design Of SVPWM PV Grid-connected Inverter System Based On TMS320F2812

Grid-connected photovoltaic(PV) system is the development trend of solar energy utilization. The paper aims at the disadvantage of inverter power source based on traditional SPWM modulation, whose efficiency is not high and the reliability is bad. So a 220V/50Hz Grid-connected inverter is developed based on SVPWM modulation, meanwhile, the main control chip is TMS320LF2812 and the main circuit is three-phase inverter module. Using the single neuron PI voltage closed-loop control method based on SVPWM technology to improve the output voltage wave quality of the Grid-connected inverter. And its main circuit is simulated under the environment of Matlab/Simulink and the hard-software structure and the control algorithm of the system are designed and achieved. According to the results, they prove that the Design is feasible and effective. And according to prototype experimental results, the designed Grid-connected Inverter has the advantages of simple hardware circuit, the high quality of the output waveform and voltage stability.