为使光伏系统可稳定输出高直流电压,提出一种新型超高升压DC-DC变换器的设计。变换器采用耦合电路升压结构增加了新的增益调节单元。新型开关单元降低了开关器件的电压应力和电压尖峰。耦合电感与开关电容结合,降低了器件的电压、电流尖峰,吸收了耦合电感的漏感能量。对变换器进行闭环控制,稳定变换器的输出。分析电路的工作模态,与近几年典型高升压变换器做性能对比,测试变换器的抗扰动性能。根据仿真和实验,验证变换器在闭环控制下的稳定性和鲁棒性。
Abstract
In order to make the photovoltaic system can output high DC voltage stably, a novel design of ultra-high Boost DC-DC converter is proposed. The converter adopts coupled circuit Boost structure and adds a new gain regulation unit. The new switching unit reduces the voltage stress and voltage spike of the switching device. The coupling inductor and switching capacitor can reduce the voltage and current peak of the device, and absorb the leakage energy of the coupling inductor. The output of the converter is stabilized by closed-loop control. The working mode of the circuit is analyzed, and the performance of the converter is compared with that of the typical high-Boost converter in recent years to test the anti-disturbance performance of the converter. According to simulation and experiment, the stability and robustness of the converter under closed-loop control are verified.
关键词
光伏发电 /
DC-DC变换器 /
耦合电路 /
增益调节 /
闭环控制 /
鲁棒性
Key words
photovoltaic power generation /
DC-DC converters /
coupling circuits /
gain regulation /
closed-loop control /
robustness
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基金
2019年辽宁省自然科学基金指导项目（2019-ZD-0039）; 2020年辽宁省教育厅科学研究基础研究项目（LJ2020JCL003）
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