基于STM32的单相光伏并网发电系统  

Design of single-phase photovoltaic grid-connection system based on STM32

作　　者：周红标[1] 应根旺[1] 蒋恒[1] 郑潮中 

机构地区：[1]淮阴工学院电子与电气工程学院,江苏淮安223003

出　　处：《电测与仪表》2015年第19期61-66,73,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(61203056);淮安市科技支撑项目(HAG2014001)

摘　　要：提出了一种基于STM32的单相光伏并网发电系统的设计方案。首先建立了基于电导增量法的最大功率点跟踪和基于主动频率偏移法的孤岛效应检测数学仿真模型,然后以STM32为核心处理器,采用锁相环技术与电网电压前馈补偿的复合控制策略,结合BUCK充电控制电路、交错反激变换电路、全桥逆变电路、信号适配电路和信号检测电路,实现了样机设计。测试结果表明:样机运行稳定、可靠,谐波含量THD和孤岛检测耗时均在相关标准要求范围内。A single-phase PV（ Photovoltaic） grid-connection design scheme based on STM32 is proposed in this paper. Firstly,the mathematical simulation models of incremental conductance method and active frequency drift are established,which applied to MPPT（ maximum power point tracking） and islanding detection. Then,the prototype is designed,which using STM32 as the core processor,adopting composite control strategy based on PLL and grid voltage front feed-forward compensation,combining BUCK charge control circuit,interleaved fly-back converter circuit,full-bridge inverter circuit,signal adaptation and detection circuit. Finally,test results show that the prototype is stable and reliable,the harmonic content THD and islanding detection time consuming meet the requirements of relevant standards.

关 键 词：单相光伏并网 STM32 电导增量法 主动频率偏移法 

分 类 号：TM727[电气工程—电力系统及自动化]