1.State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China 2.Beijing Sifang Automation Co.Ltd. Beijing 100085 China 3.State Key Lab of Control and Simulation of Power Systems and Generation Equipments Tsinghua University Beijing 100084 China
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.
梁营玉,张涛,刘建政,杨奇逊,梅红明,刘树. 模型预测控制在MMC-HVDC中的应用[J]. 电工技术学报, 2016, 31(1): 128-138.
Liang Yingyu,Zhang Tao,Liu Jianzheng,Yang Qixun,Mei Hongming,Liu Shu. The Applications of the Model Predictive Control for MMC-HVDC. Transactions of China Electrotechnical Society, 2016, 31(1): 128-138.
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2016, Vol. 31 
