针对光储系统提出一种三端口拓扑结构,该拓扑通过在基于移相全桥的部分功率变换器上扩展出蓄电池端口,来克服部分功率变换器抗输入扰动能力差的缺点,且蓄电池端口具备功率控制功能,有利于提高光储系统功率密度。首先给出电路建立过程,并给出功率传输的数学描述和小信号模型,给出变换器控制策略。仿真与实验结果表明,变换器的电压稳定性得到提升并实现最大功率点跟踪、充放电控制和负载电压稳定的功能,且在切载时具有良好的动态性能。
Abstract
A three-port topology for the photovoltaic-storage system is proposed, which extends the battery port on the basis of the partial power processing phase-shifted full-bridge converter to solve the disadvantage of the poor anti-input disturbance ability of the partial power processing converter. Its battery port has the power control function, which is beneficial to improve the power density of the optical storage system. The paper first gives the circuit establishment process, and gives the mathematical description of power transmission and small signal model, and presents the control strategy of the converter. The simulation and experiment results show that the voltage stability of the converter is improved, and the functions of maximum power point tracking, charge and discharge control and load voltage regulation are realized, and the converter has good dynamic performance when the load changes.
关键词
光储系统 /
升压 /
部分功率变换 /
三端口变换器
Key words
photovoltaic-storage system /
step-up voltage /
partial power processing /
three-port converter
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参考文献
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基金
装备预研教育部联合基金（6141A02022528）; 国家自然科学基金（52077199）
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