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首页> 外文期刊>Power Electronics, IET >Voltage regulation of photovoltaic arrays: small-signal analysis and control design
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Voltage regulation of photovoltaic arrays: small-signal analysis and control design

机译:光伏阵列的电压调节:小信号分析和控制设计

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摘要

This study deals with the regulation of the output voltage of photovoltaic (PV) arrays. As a case study, the DC¿DC buck converter is used as an interface between the PV array and the load, but other types of converters can be used for the same purpose. The input voltage of the converter is controlled in order to regulate the operating point of the array. Besides reducing losses and stress because of the bandwidth-limited regulation of the converter duty cycle, controlling the converter input voltage reduces the settling time and avoids oscillation and overshoot, making easier the functioning of maximum power point tracking (MPPT) methods. The voltage regulation problem is addressed with a detailed analysis that starts with the modelling of the PV array and the converter. This analysis is followed by study, design, simulation and practical experiments of three closed-loop control strategies for the buck converter. Control stability and implementation considerations are presented.
机译:这项研究涉及光伏(PV)阵列输出电压的调节。作为案例研究,DC×DC降压转换器用作PV阵列与负载之间的接口,但其他类型的转换器也可以用于相同的目的。控制转换器的输入电压以调节阵列的工作点。除了由于转换器占空比的带宽受限调节而减少损耗和压力外,控制转换器输入电压还减少了建立时间,并避免了振荡和过冲,从而简化了最大功率点跟踪(MPPT)方法的功能。通过从PV阵列和转换器的建模开始的详细分析解决了电压调节问题。在此分析之后,将对降压转换器的三种闭环控制策略进行研究,设计,仿真和实际实验。介绍了控制稳定性和实现注意事项。

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