CAJ | 학술논문

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.
제출료일충기우STM32적단상광복병망발전계통적설계방안. 수선건립료기우전도증량법적최대공솔점근종화기우주동빈솔편이법적고도효응검측수학방진모형,연후이STM32위핵심처리기,채용쇄상배기술여전망전압전궤보상적복합공제책략,결합BUCK충전공제전로、교착반격변환전로、전교역변전로、신호괄배전로화신호검측전로,실현료양궤설계. 측시결과표명:양궤운행은정、가고,해파함량THD화고도검측모시균재상관표준요구범위내.
A single-phase PV ( Photovoltaic) grid-connection design scheme based on STM32 is proposed in this pa-per.Firstly, the mathematical simulation models of incremental conductance method and active frequency drift are es-tablished, 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 volt-age 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 sta-ble and reliable, the harmonic content THD and islanding detection time consuming meet the requirements of relevant standards.