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| A Single-Stage Buck-Boost Inverter with Non-Electrolytic Capacitor |
| Wang Liqiao1, Li Zhanyi1, Liu Le1, Huang Haiwen2 |
1. Key Laboratory of Power Electronics for Energy Conservation and Drive Control of Hebei Province Yanshan University Qinhuangdao 066004 China;
2. State Grid Jibei Electric Power Company Supply Branch of Funing District Qinhuangdao 066300 China |
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Abstract Since the voltage source inverter used in the medium and low-power photovoltaic power generation systems cannot operate in Buck-Boost operation and the high-capacity electrolytic capacitors are required in DC side, a novel non-electrolytic capacitor single-stage Buck-Boost inverter is proposed. This inverter has buck-boost capability and strong resistance to low-frequency pulsation on the input side, which helps to reduce the value of the input side filter capacitor, thereby realizing the entire system without electrolytic capacitor. The inverter has the advantages of low cost, long life, high reliability, and simple short circuit and open circuit protection, which is suitable for the medium and low-power photovoltaic power generation systems. In this paper, the operation principle of the inverter is introduced, its mathematical model is deduced, and the parameter design is performed. Based on the theoretical analysis, the simulation and experimental verification are performed. The results prove the correctness of the theoretical analysis.
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Received: 28 June 2018
Published: 30 October 2019
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2019, Vol. 34 
