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上海电力学院学报:2019,35(6):553-561
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电网电压不平衡条件下MMC控制策略的仿真比较研究
(1.淮浙煤电有限责任公司 凤台发电厂;2.上海电力学院 自动化工程学院;3.上海电力公司 市北供电分公司)
Research on Simulation and Comparison of MMC Control Strategies under Unbalanced Grid Voltage
(1.Huaizhe Coal Power Co., Ltd., Fengtai Power Plant, Huainan 232131, China;2.School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China;3.North Power Supply Branch, Shanghai Electric Power Company, Shanghai 200041, China)
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投稿时间:2019-04-02    
中文摘要: 当电网电压不平衡时,交流侧的电流会出现不对称,有功功率和无功功率在模块化多电平变流器(MMC)外部出现二次波动,严重影响系统的稳定性和电源质量。因此,在电网电压不平衡条件下控制MMC是非常必要的。针对电网电压不平衡状态下的MMC交流侧三相电流不对称、有功功率二次脉动、无功功率二次脉动问题,对这3种控制目标下的参考电流分别进行了求解,并制定了传统PI控制、滑模控制、无源控制等控制策略。最后,在MATLAB/Simulink平台上仿真并比较3种控制策略的优缺点。
Abstract:When the grid voltage is unbalanced,the current on the AC side will be asymmetrical,and the active power and reactive power will cause secondary fluctuations outside the MMC,which seriously affects the stability of the system and the power quality.Therefore,it is necessary to control the MMC under grid voltage imbalance.For MMC under grid voltage imbalance,AC phase three-phase current is asymmetrical,active power secondary pulsation,and reactive power secondary pulsation problem.Firstly,the reference currents of the three control targets are solved separately,and the control strategies such as conventional PI controller,sliding mode controller and passive controller are formulated.Finally,the advantages and disadvantages of various controls are compared on the MATLAB/Simulink platform.
文章编号:     中图分类号:TM46    文献标志码:
基金项目:国家自然科学基金(61573239);上海市重点科技攻关计划项目(14110500700);上海市电站自动化技术重点实验室项目(13DZ2273800)。
引用文本:
刘道远,程启明,孙伟莎,等.电网电压不平衡条件下MMC控制策略的仿真比较研究[J].上海电力学院学报,2019,35(6):553-561.
LIU Daoyuan,CHENG Qiming,SUN Weisha,et al.Research on Simulation and Comparison of MMC Control Strategies under Unbalanced Grid Voltage[J].Journal of Shanghai University of Electric Power,2019,35(6):553-561.