鲁西异步联网工程MMC环流抑制对换流器输出电压谐波的影响
|
摘要
本文依托鲁西异步联网工程柔性直流换流单元开展研究,从换流器的基本原理出发,分析了模块化多电平结构换流器的桥臂环流对换流器输出电压的影响,分析表明无论有无桥臂环流,换流器输出交流相电压中均包含以3次为主的3、5次及以上奇数次谐波分量,而采用了环流抑制后换流器输出交流相电压3次谐波会有所下降,但并不能完全消除;采用了基于PR控制器的环流抑制策略来抑制鲁西工程柔直换流单元的桥臂二次环流谐波;通过PSCAD/EMTDC模型搭建了鲁西工程柔直换流单元的仿真模型,通过仿真计算数据和鲁西工程现场录波数据进行对比验证,证明了推导和分析的合理性及所采用的环流抑制控制策略在工程中应用的有效性。
In this paper, the study based on VSC-HVDC unit of Luxi DC asynchronous interconnection project is conducted. The influence of bridge arm circulation current of converter with modular multilevel structure is analyzed on the basis of basic principle of the converter. It is shown by the analysis that with or without the bridge arm circulating current, the output AC phase voltage of the converter contains 3 rd,5 th and above odd harmonic component with the 3 rd harmonic component as dominant. While the 3 rd harmonic of output AC phase voltage of the converter can be reduced after using the circulating current control, but cannot be eliminated completely. The circulating current control strategy based on PR controller is adopted to suppress the secondary circulating current harmonics of the bridge arm of VSC-HVDC unit of Luxi project. The simulation model of VSC-HVDC unit of Luxi project is established by using PSCAD/EMTDC. The comparison and verification through the simulation calculation data and site recording data of Luxi project to demonstrate the reasonableness of derivation and analysis and the effectiveness of application of circulating current suppression control strategy in the project.
In this paper, the study based on VSC-HVDC unit of Luxi DC asynchronous interconnection project is conducted. The influence of bridge arm circulation current of converter with modular multilevel structure is analyzed on the basis of basic principle of the converter. It is shown by the analysis that with or without the bridge arm circulating current, the output AC phase voltage of the converter contains 3 rd,5 th and above odd harmonic component with the 3 rd harmonic component as dominant. While the 3 rd harmonic of output AC phase voltage of the converter can be reduced after using the circulating current control, but cannot be eliminated completely. The circulating current control strategy based on PR controller is adopted to suppress the secondary circulating current harmonics of the bridge arm of VSC-HVDC unit of Luxi project. The simulation model of VSC-HVDC unit of Luxi project is established by using PSCAD/EMTDC. The comparison and verification through the simulation calculation data and site recording data of Luxi project to demonstrate the reasonableness of derivation and analysis and the effectiveness of application of circulating current suppression control strategy in the project.
引文
[1]徐政,薛英林,张哲任.大容量架空线柔性直流输电关键技术及前景展望[J].中国电机工程学报,2014,34(29):5051-5062.XU Zheng, XUE Yinglin, ZHANG Zheren. VSC-HVDC technology suitable for bulk power overhead line transmission[J]. Proceedings of the CSEE, 2014, 34(29):5051-5062.
[2]杨晓峰,郑琼林,薛尧,等.模块化多电平换流器的拓扑和工业应用综述[J].电网技术,2016,40(1):1-10.YANG Xiaofeng, ZHENG Qionglin, XUE Yao, et al. Review on topology and industry applications of modular multilevel converter[J]. Power System Technology, 2016,40(1):1-10.
[3] LESNICAR A,MARQUARDT R,An innovative modular multilevel converter topology suitable for a wide power range[C]//2003 IEEE Bologna Power Tech Conference,vol. 3. 2003:6-8.
[4]汤广福,贺之渊,庞辉.柔性直流输电工程技术研究、应用及发展[J].电力系统自动化,2013,37(15):3-14.TANG Guangfu,HE Zhiyuan, PANG Hui. Research, application and development of VSC-HVDC engineering technology[J]. Automation of Electric Power Systems, 2013,37(15):3-14.
[5]胡航海,李敬如,杨卫红,等.柔性直流输电技术的发展与展望[J].电力建设,2011,32(5):62-66.HU Hanghai, LI Jingru, YANG Weihong, et al. The development and prospect of HVDC flexible technology[J]. Electric Power Construction,2011,32(5):62-66.
[6]赵岩,胡学浩,汤广福,等.模块化多电平变流器HVDC输电系统控制策略[J].中国电机工程学报,2011,31(25):35-42.ZHAO Yan,HU Xuehao,TANG Guangfu,et al. Control strategy of modular multilevel converters based HVDC transmission[J]. Proceedings of the CSEE, 2011,31(25):35-42.
[7] FRANQUELO L G, RODRIGUEZ J, LEON J I, et al. The age of multilevel converters arrives[J]. IEEE Industrial Electronics Magazine,2008,2(2):28-39.
[8]刘普,王跃,雷万钧,等.模块化多电平变流器桥臂电感参数设计[J].电网技术,2015,39(6):1665-1671.LIU Pu, WANG Yue,LEI Wanjun,et al. Parameter designing of arm reactor for modular multilevel converter[J]. Power System Technology,2015,39(6):1665-1671.
[9] AKAGI H. Classification, terminology, and application of the modular multilevel cascade converter(MMCC)[J]. IEEE Transactions on Power Electronics, 2011,26(11):3119-3130.
[10]杨文博,宋强,刘文华,等.降低模块化多电平换流器子模块电容值的控制方法[J].电力系统自动化,2015,39(16):86-94.YANG Wenbo,SONG Qiang,LIU Wenhua,et al. A control strategy for reducing submodule capacitance value of modular multilevel converter[J]. Automation of Electric Power Systems,2015,39(16):86-94.
[11]管敏渊,徐政.模块化多电平换流器型直流输电的建模与控制[J].电力系统自动化,2010,34(19):64-68.GUAN Minyuan,XU Zheng. Modeling and control of modular multilevel converter in HVDC transmission[J]. Automation of Electric Power Systems,2010,34(19):64-68.
[12]屠卿瑞,徐政,管敏渊,等.模块化多电平换流器环流抑制控制器设计[J].电力系统自动化,2010,34(18):57-61.TU Qingrui, XU Zheng, GUAN Minyuan, et al. Design of circulating current suppressing controllers for modular multilevel converter[J]. Automation of Electric Power Systems,2010,34(18):57-61.
[13]张建坡,赵成勇.模块化多电平换流器环流及抑制策略研究[J].电工技术学报,2013,28(10):328-336.ZHANG Jianpo,ZHAO Chengyong Research on circulation current and suppressing strategy of modular multilevel con-verter[J]. Transactions of China Electrotechnical Society,2013,28(10):328-336.
[14]阎发友,汤广福,贺之渊,等.一种适用于模块化多电平换流器的新型环流控制器[J].电力系统自动化,2014,38(1):104-108.YAN Fayou,TANG Guangfu,HE Zhiyuan,et al. A novel circulating current controller for modular multilevel converter[J].Automation of Electric Power Systems, 2014, 38(1):104-108.
[15]LI Zixin,WANG Ping,CHU Zunfang,et al. An inner current suppressing method for modular multilevel converters[J].IEEE Transactions on Power Electronics, 2013, 28(11):4873-4879.
[16]王朝明,王华广,王晴.基于双PI控制器的模块化多电平变换器环流抑制策略[J].电网技术,2014.38(10):2905-2912.WANG Chaoming, WANG Huaguang, WANG Qing. A dual PI controller based strategy to suppress circulating current in modular multilevel converter[J]. Power System Technology,2014,38(10):2905-2912.
[17]李鹏鹏,郭家虎,梁克靖,基于MMC的最近电平逼近调制谐波特性分析[J].电源技术,2014,38(4):759-763.LI Pengpeng, GUO Jiahu, LIANG Kejing, Analysis of harmonic characteristics for nearest level modulation based on MMC[J].Chinese Journal of Power Sources, 2014:38(4):759-763.
[2]杨晓峰,郑琼林,薛尧,等.模块化多电平换流器的拓扑和工业应用综述[J].电网技术,2016,40(1):1-10.YANG Xiaofeng, ZHENG Qionglin, XUE Yao, et al. Review on topology and industry applications of modular multilevel converter[J]. Power System Technology, 2016,40(1):1-10.
[3] LESNICAR A,MARQUARDT R,An innovative modular multilevel converter topology suitable for a wide power range[C]//2003 IEEE Bologna Power Tech Conference,vol. 3. 2003:6-8.
[4]汤广福,贺之渊,庞辉.柔性直流输电工程技术研究、应用及发展[J].电力系统自动化,2013,37(15):3-14.TANG Guangfu,HE Zhiyuan, PANG Hui. Research, application and development of VSC-HVDC engineering technology[J]. Automation of Electric Power Systems, 2013,37(15):3-14.
[5]胡航海,李敬如,杨卫红,等.柔性直流输电技术的发展与展望[J].电力建设,2011,32(5):62-66.HU Hanghai, LI Jingru, YANG Weihong, et al. The development and prospect of HVDC flexible technology[J]. Electric Power Construction,2011,32(5):62-66.
[6]赵岩,胡学浩,汤广福,等.模块化多电平变流器HVDC输电系统控制策略[J].中国电机工程学报,2011,31(25):35-42.ZHAO Yan,HU Xuehao,TANG Guangfu,et al. Control strategy of modular multilevel converters based HVDC transmission[J]. Proceedings of the CSEE, 2011,31(25):35-42.
[7] FRANQUELO L G, RODRIGUEZ J, LEON J I, et al. The age of multilevel converters arrives[J]. IEEE Industrial Electronics Magazine,2008,2(2):28-39.
[8]刘普,王跃,雷万钧,等.模块化多电平变流器桥臂电感参数设计[J].电网技术,2015,39(6):1665-1671.LIU Pu, WANG Yue,LEI Wanjun,et al. Parameter designing of arm reactor for modular multilevel converter[J]. Power System Technology,2015,39(6):1665-1671.
[9] AKAGI H. Classification, terminology, and application of the modular multilevel cascade converter(MMCC)[J]. IEEE Transactions on Power Electronics, 2011,26(11):3119-3130.
[10]杨文博,宋强,刘文华,等.降低模块化多电平换流器子模块电容值的控制方法[J].电力系统自动化,2015,39(16):86-94.YANG Wenbo,SONG Qiang,LIU Wenhua,et al. A control strategy for reducing submodule capacitance value of modular multilevel converter[J]. Automation of Electric Power Systems,2015,39(16):86-94.
[11]管敏渊,徐政.模块化多电平换流器型直流输电的建模与控制[J].电力系统自动化,2010,34(19):64-68.GUAN Minyuan,XU Zheng. Modeling and control of modular multilevel converter in HVDC transmission[J]. Automation of Electric Power Systems,2010,34(19):64-68.
[12]屠卿瑞,徐政,管敏渊,等.模块化多电平换流器环流抑制控制器设计[J].电力系统自动化,2010,34(18):57-61.TU Qingrui, XU Zheng, GUAN Minyuan, et al. Design of circulating current suppressing controllers for modular multilevel converter[J]. Automation of Electric Power Systems,2010,34(18):57-61.
[13]张建坡,赵成勇.模块化多电平换流器环流及抑制策略研究[J].电工技术学报,2013,28(10):328-336.ZHANG Jianpo,ZHAO Chengyong Research on circulation current and suppressing strategy of modular multilevel con-verter[J]. Transactions of China Electrotechnical Society,2013,28(10):328-336.
[14]阎发友,汤广福,贺之渊,等.一种适用于模块化多电平换流器的新型环流控制器[J].电力系统自动化,2014,38(1):104-108.YAN Fayou,TANG Guangfu,HE Zhiyuan,et al. A novel circulating current controller for modular multilevel converter[J].Automation of Electric Power Systems, 2014, 38(1):104-108.
[15]LI Zixin,WANG Ping,CHU Zunfang,et al. An inner current suppressing method for modular multilevel converters[J].IEEE Transactions on Power Electronics, 2013, 28(11):4873-4879.
[16]王朝明,王华广,王晴.基于双PI控制器的模块化多电平变换器环流抑制策略[J].电网技术,2014.38(10):2905-2912.WANG Chaoming, WANG Huaguang, WANG Qing. A dual PI controller based strategy to suppress circulating current in modular multilevel converter[J]. Power System Technology,2014,38(10):2905-2912.
[17]李鹏鹏,郭家虎,梁克靖,基于MMC的最近电平逼近调制谐波特性分析[J].电源技术,2014,38(4):759-763.LI Pengpeng, GUO Jiahu, LIANG Kejing, Analysis of harmonic characteristics for nearest level modulation based on MMC[J].Chinese Journal of Power Sources, 2014:38(4):759-763.