基于DSP的1kW光伏并网逆变器设计  

Design of 1 kW Photovoltaic Grid-connected Inverter Based on DSP

作　　者：焦静静[1,2] 康明才[1] 张兰红[2] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094 [2]盐城工学院电气工程学院,江苏盐城224003

出　　处：《实验室研究与探索》2017年第2期87-90,101,共5页Research and Exploration In Laboratory

摘　　要：提出了一种以DSP28335为主控核心的1 kW光伏并网逆变器设计方案,逆变器采用两级式拓扑结构进行DC/AC转换,其中前级采用非隔离型耦合电感式倍压Boost变换器,该结构电压增益高且电路损耗小。对逆变器基于PI调节的双闭环控制策略进行了说明,并介绍了硬件电路以及软件的设计过程。实验结果验证了设计参数和控制方法的正确性与可靠性。A 1 kW photovoltaic grid-connected inverter which uses DSP28335 as the core processor is proposed. Twostage topological structure is adopted for DC/AC conversion in the inverter. A non-isolated coupled inductor voltage doubler cell Boost converter is used in the pre-stage,it realizes high voltage gain and low loss of the circuit. The double closed-loop control strategy based on PI adjuster is explained. The design process of main circuit and control circuit is introduced in detail. The experiment shows that the prototype meets the proposed design criterion.

关 键 词：光伏逆变器 耦合电感 双闭环 数字信号处理器 

分 类 号：TM464[电气工程—电器]