无权重系数的三相八开关模型预测电流控制

doi:10.19595/j.cnki.1000-6753.tces.L90066

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Abstract For the eight-switch three-phase inverter (ESTPI), this paper proposes a predictive current control method without weighting factors to suppress DC-link capacitor voltage fluctuation. First, on the basis of the neutral-point-clamped (NPC) three-level inverter, it analyses the topology and mathematical model of ESTPI. And at the same time it analyses the cause of the capacitor voltage fluctuation and establishes the mathematical model. Then, it uses the mathematical model of inductive load to predict the current. For the stability of the system after fault-tolerant control, the cost function of conventional model predictive control method is set up to supress the fluctuation and control the current. In order to eliminate the weighting factor, the cost function without weighting factors is analyses and proposed. Taking into account of application in practice, the delay is compensated. On the foundation of the conventional model of predictive control and mathematical model referred above, the new model of the proposed method is established. Finally, the proposed control algorithm is verified by the simulation.

Key words： Eight-switch three-phase inverter model predictive current control cost function weighting factors

Received: 20 June 2020

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TM464

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	Articles by authors
	Cheng Shu
	Ouyang Zekeng
	Zhang Lulin
	Li Zhuoxin
	Xiang Chaoqun

Cite this article:

Cheng Shu,Ouyang Zekeng,Zhang Lulin等. A Model Predictive Current Control Method Without Weighting Factors for Eight-Switch Three-Phase Inverter[J]. Transactions of China Electrotechnical Society, 2021, 36(zk1): 265-273.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90066 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/Izk1/265

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