模型预测控制在MMC-HVDC中的应用

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Abstract Aiming at eliminating the existing shortcomings of the traditional unbalanced control strategy for high voltage direct current transmission based on modular multilevel converter (MMC-HVDC) under asymmetry ac system,this paper proposes two improved unbalanced control methods,i.e.the current loop model predictive control and the model predictive direct power control.The two proposed methods achieve ac-side current control and ac-side active power and reactive power control of MMC,respectively.The control principle and the design process of the two methods are described in detail.In addition,the traditional dual vector control strategy is compared with them in respect of the control structure complexity,the steady-state performance,and the dynamic performance.In order to achieve three control targets under the asymmetric ac system,i.e.suppressing negative current,eliminating active power ripples,and removing reactive power ripples,the model predictive direct power control is combined with the power compensation strategy.To validate the correctness and the effectiveness of the two proposed control methods,a five level MMC-HVDC model is set up in PSCAD/EMTDC.

Key words： Modular multilevel converter model predictive control direct power control double vector control asymmetry grid voltage

Received: 23 January 2015 Published: 21 January 2016

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TM721.1

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	Articles by authors
	Liang Yingyu
	Zhang Tao
	Liu Jianzheng
	Yang Qixun
	Mei Hongming
	Liu Shu

Cite this article:

Liang Yingyu,Zhang Tao,Liu Jianzheng等. The Applications of the Model Predictive Control for MMC-HVDC[J]. Transactions of China Electrotechnical Society, 2016, 31(1): 128-138.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I1/128

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