The objective of this paper is to propose a photovoltaic charger with multi charging methods and dynamic energy regulation (DER) strategies. A dc-dc boost converter with the maximum power point tracking (MPPT) feature is utilized for the PV charger. Besides, three charging methods are realized by the converter: 1) the constant current charging, 2) the pulse-ripple-current charging and 3) the sinusoidal-ripple-current charging. However, due to unpredictable environment conditions as well as non-ideal operational characteristics of the converter, the power transferred from the PV array might be fluctuated while the charging efficiency will be decreased. Therefore, the aim of this paper is to propose DER strategies for PV chargers. Four different control methods are included in the DER strategy and developed to compensate the energy loss caused by the current limitation of the PV array. Moreover, these strategies are able to prevent the circuit damage caused by non-ideal characteristics. Eventually, the stability and the charging efficiency of the PV charger system can be increased. Finally, both simulation and experimental results obtained from a 1-kW prototype circuit verify the performance and feasibility of the proposed PV charger.

中文翻译：

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光伏充电器多种充电方法的动态能量调节策略

本文的目的是提出一种具有多种充电方法和动态能量调节（DER）策略的光伏充电器。具有最大功率点跟踪（MPPT）功能的DC-DC升压转换器用于PV充电器。此外，该转换器还实现了三种充电方法：1）恒定电流充电，2）脉动波纹电流充电，以及3）正弦纹波电流充电。但是，由于不可预测的环境条件以及转换器的非理想工作特性，从PV阵列传输的功率可能会发生波动，而充电效率将降低。因此，本文的目的是提出用于光伏充电器的DER策略。DER策略中包括四种不同的控制方法，这些方法用于补偿由PV阵列电流限制引起的能量损失。而且，这些策略能够防止由非理想特性引起的电路损坏。最终，可以提高PV充电器系统的稳定性和充电效率。最后，从1kW原型电路获得的仿真结果和实验结果均证明了所提出的PV充电器的性能和可行性。