基于Boost变换器的光伏并网逆变控制系统研究  

The Grid-connected PV Inverter Based on Boost Converter Control System Design

作　　者：许颇[1] 张崇巍[1] 张兴[1] 曹仁贤[2] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]合肥阳光电源有限公司,安徽合肥230088

出　　处：《电源技术应用》2006年第1期12-15,共4页Power Supply Technologles and Applications

摘　　要：概述了基于Boost变换器的光伏并网逆变控制系统设计。电路由一个H桥并网逆变器和一个 Boost升压斩波电路组成。通过对逆变器正弦开关函数的调制实现电流内环和电压外环的双环控制, 以取得网侧电流的单位功率因数运行和直流母线侧电压的稳定;通过对Boost斩波电路的占空比调制实现了光伏输出电压的控制,使系统工作在稳定状态。最后,以2.5 kW并网逆变系统的试验结果验证了设计的正确性。A control system design scheme for grid-connected PV inverter based on Boost converter is summarized. The system is constituted with an H-bridge grid-connected inverter and a Boost chopping circuit. In order to obtain the grid current tracking and DC bus voltage stabilization, the double loop control is adopted by modulating the sinusoidal PWM; by modulating the Boost duty cycle, PV output voltage is controlled. Finally a 2. 5 kW grid-connected inverter has been built and the experiment results validate the operating principle.

关 键 词：BOOST 并网逆变 双环控制 光伏 

分 类 号：TM615[电气工程—电力系统及自动化]