一种适用于小功率可再生能源的单相高频双Buck全桥并网逆变器

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Abstract A single-phase high frequency dual-Buck full-bridge inverter for small-scale renewable source application is proposed in this paper. Based on the entire SiC power switches, the proposed inverter can operate in a high frequency at 100 kHz, and thus both the inductor volume and the ripple of the grid-connected current are reduced. This paper also analyzes the control strategy of the inverter, where a voltage-current dual loop controller is employed. In the current loop, a three-pole-three-zero (3P3Z) compensator is applied to make sure that the grid-connected current can fast track the current reference generated by the voltage loop. A simple linearization algorithm is also adopted to calculate the controlling duty cycle, to achieve high frequency operation. Besides producing the current reference, the voltage loop employs a two-pole-two-zero (2P2Z) compensator to stabilize the bus voltage at the voltage reference, so that the inverter can delivery power to the grid and regulate bus voltage simultaneously. Moreover, a second-order generalized integrator software phase lock loop (SOGI-SPLL) is used to generate the phase signal, which has the same phase with grid voltage. At last, prototype experiment has verified the theoretical analyses.

Key words： SiC power switch, grid-connected generation, dual-Buck inverter, high frequency conversion, software phase lock loop

Received: 20 August 2016 Published: 02 May 2017

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TM464

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	Meng Zhun
	Wang Yifeng
	Yang Liang

Cite this article:

Meng Zhun,Wang Yifeng,Yang Liang. A Single-Phase High Frequency Dual-Buck Full-Bridge Inverter for Small-Scale Renewable Source Application[J]. Transactions of China Electrotechnical Society, 2017, 32(8): 220-228.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I8/220

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