Dual-Input Single-Resonant Tank LLC Converter with Phase Shift Control for PV Applications
Dual-Input Single-Resonant Tank LLC Converter with Phase Shift Control for PV Applications
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DOI：
10.1109/tia.2018.2883015
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发表时间：
2019-03
影响因子：
4.4
通讯作者：
S. M. Tayebi;Haibing Hu;S. Abdel-Rahman;I. Batarseh
中科院分区：
文献类型：
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作者：
S. M. Tayebi;Haibing Hu;S. Abdel-Rahman;I. Batarseh
本文提出了一种双输入LLC谐振转换器，它与两个光伏(PV)板接口。该拓扑是具有四个有源开关的双半桥LLC电路。这种拓扑结构允许两个电源共享同一谐振腔，以便将能量传递给负载，而不需要额外的电路元件。采用移相脉宽调制(PWM)控制对每个光伏面板进行独立的最大功率点跟踪(MPPT)。通过改变每个电源的PWM相移来实现独立的MPPT。在整个电源电压和负载条件范围内，所有开关均可实现零电压开关。此外，开关两端的电压应力不超过输入光伏电压。搭建了一个500W的样机来演示所提出的拓扑结构的性能。输入电压范围选择在25至50 V之间，输出电压调整为220 V DC。实验结果表明，在保持较宽的输入电压范围和实现每个光伏面板的MPPT的同时，所提出的变流器可以达到95.8%的峰值效率。
This paper proposes a dual-input LLC resonant converter that interfaces with two photovoltaic (PV) panels. The topology is a dual half-bridge LLC circuit with four active switches. This topology allows the two sources to share the same resonant tank for transferring energy to the load without the need for additional circuit components. A phase-shift pulsewidth modulation (PWM) control is employed to implement independent maximum power point tracking (MPPT) for each PV panel. Independent MPPT is achieved by varying the PWM phase shift of each source. Zero-voltage-switching is realized in all switches over the entire range of source voltage and load conditions. In addition, voltage stress across switches does not exceed the input PV voltage. A 500-W prototype was built to demonstrate the performance of the proposed topology. The input voltage range was selected between 25 and 50 V with an output voltage regulated at 220 V dc. Experimental results show that the proposed converter can achieve the peak efficiency of 95.8% while maintaining a wide input voltage range and implementing MPPT for each PV panel.