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新能源发电串联分布式高能效变换系统

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Keywords: 分布式能源系统,模块集成变换器,新能源发电系统,升降压变换器,高能效

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Abstract:

针对光伏组件、热电发电机等新能源发电模块输出电压低的特点,以系统发电功率最大化为控制目标,研究模块串联分布式新能源发电系统中的高能效模块集成变换器拓扑及其控制策略。分析不同变换器类型对系统性能和发电设备输出特性的影响;综合考虑变换器变换效率和最大功率跟踪效率,提出引入直通工作模式实现变换器全电压范围最大功率输出的控制策略和实现方法;并提出具有直通模式的改进型升降压变换器拓扑,详细分析工作模式和设计实现。搭建由13个250W模块组成的串联分布式实验系统,验证了理论分析的正确性。

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