不对称电压跌落下逆变电源的多目标控制策略

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Abstract The grid interface inverters of distribution generation should realize low-voltage ride-through property to deliver power to the grid under unbalanced voltage sags.In this paper,a novel multi-objective control strategy is proposed for grid-interface inverters to meet diverse ride-through requirements during gird faults.First,a unified formula for the current reference is established and multiple targets can be controlled by the adjustable parameters k₁ and k₂.Next,an optimized search path for k₁ and k₂ is derived to control the oscillating power of the inverter.Moreover,a linear search path which can replace the optimized one is obtained by simplifying the optimized path.Then,according to the monotonous property of the controlling objective,a novel multi-objective control scheme is proposed with adaptive limitation for the current unbalanced factor.Finally,the effectiveness and flexibility of the proposed control strategies are verified by simulation results.

Key words： Inverter voltage sag multi-objective power control grid fault

Received: 03 August 2015 Published: 19 January 2017

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TM71

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	Articles by authors
	Xiong Fei
	Wu Junyong
	Hao Liangliang
	Tian Mingjie
	Zhang Jurui
	Zhang Jiao

Cite this article:

Xiong Fei,Wu Junyong,Hao Liangliang等. Multi-Objective Control Strategies of Grid Interface Inverter under Unbalanced Voltage Sags[J]. Transactions of China Electrotechnical Society, 2017, 32(1): 107-116.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I1/107

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