许烽;宣晓华;江道灼;黄晓明;虞海泓;陆翌;裘鹏;

• 1:国网浙江省电力公司电力科学研究院
• 2:浙江大学电气工程学院
• 3:国网浙江省电力公司湖州供电公司

摘要(Abstract)：

基于电网换相换流器(line commutated converter,LCC)和电压源型换流器(voltage source converter,VSC)的混合直流输电技术结合了LCC的经济优势和VSC的技术优势。该文针对常规直流工程改造,首先给出了受端LCC改造成真双极和伪双极VSC两种主回路拓扑结构,并对两者的工程改造范围和工程改造量进行了对比分析,指出了真双极和伪双极结构作为改造拓扑的优缺点。然后,通过对国内外模块化多电平换流器(modular multilevel converter,MMC)拓扑及其变结构拓扑的调研,详细研究了5类MMC优化拓扑结构在直流故障清除、送端交流故障功率不间断、低电压运行、潮流反转等方面的技术特性以及在改造成本、运行损耗等经济方面的优劣性,并直观地对比总结了5类MMC优化拓扑的综合特性,为未来MMC技术在常规直流输电系统受端换流阀改造中的应用提供了技术参考。

关键词(KeyWords)： 常规直流;混合直流;电网换相换流器;模块化多电平换流器;改造

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 许烽;宣晓华;江道灼;黄晓明;虞海泓;陆翌;裘鹏;

Email:

DOI: 10.13335/j.1000-3673.pst.2017.0161

参考文献(References)：

• [1]浙江大学直流输电组.直流输电[M].北京:水利电力出版社,1982:1-24.
• [2]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004:1-39.
• [3]徐政,屠卿瑞,管敏渊,等.柔性直流输电系统[M].北京:机械工业出版社,2012:10-32.
• [4]汤广福.基于电压源换流器的高压直流输电技术[M].北京:中国电力出版社,2010:1-25.
• [5]冯明,李兴源,李宽.混合直流输电系统综述[J].现代电力,2015,32(2):1-8.Feng Ming,Li Xingyuan,Li Kuan.A review on hybrid HVDC system[J].Modern Electric Power,2015,32(2):1-8(in Chinese).
• [6]李程昊.混合直流输电系统拓扑结构及关键技术研究[D].武汉:华中科技大学,2015.
• [7]李广凯,李庚银,梁海峰,等.新型混合直流输电方式的研究[J].电网技术,2006,30(4):82-86.Li Guangkai,Li Gengyin,Liang Haifeng,et al.Research on a novel hybrid HVDC system[J].Power System Technology,2006,30(4):82-86(in Chinese).
• [8]唐庚,徐政,薛英林.LCC-MMC混合直流输电系统[J].电工技术学报,2013,28(10):301-310.Tang Geng,Xu Zheng,Xue Yinglin.A LCC-MMC hybrid HVDC transmission system[J].Transactions of China Electrotechnical Society,2013,28(10):301-310(in Chinese).
• [9]许烽,徐政.基于LCC和FHMMC的混合型直流输电系统[J].高电压技术,2014,40(8):2520-2530.Xu Feng,Xu Zheng.Hybrid HVDC system based on LCC and FHMMC[J].High Voltage Engineering,2014,40(8):2520-2530(in Chinese).
• [10]薛英林,葛风雷,赵峥,等.LCC-C-MMC混合高压直流系统直流低电压穿越控制策略[J].高电压技术,2016,42(1):85-96.Xue Yinglin,Ge Fenglei,Zhao Zheng,et al.DC low-voltage ride-through control strategy of LCC-C-MMC hybrid HVDC system[J].High Voltage Engineering,2016,42(1):85-96(in Chinese).
• [11]袁旭峰.新型混合多端直流输电系统理论及其若干关键问题研究[D].武汉:华中科技大学,2007.
• [12]吴亚楠,安婷,庞辉,等.LCC/VSC混合直流电网模型研究[J].中国电机工程学报,2016,36(8):2077-2083.Wu Yanan,An Ting,Pang Hui,et al.Study on hybrid line commutated converter/voltage source converter DC Grid test model[J].Proceedings of the CSEE,2016,36(8):2077-2083(in Chinese).
• [13]翟冬玲,韩民晓,严稳利.DFIG型海上风电混合直流送出的控制策略[J].电力自动化设备,2015,35(2):42-48.Zhai Dongling,Han Minxiao,Yan Wenli.Control of offshore DFIG-based wind farm with hybrid HVDC transmission[J].Electric Power Automation Equipment,2015,35(2):42-48(in Chinese).
• [14]于洋,徐政,徐谦,等.永磁直驱式风机采用混合直流并网的控制策略[J].中国电机工程学报,2016,36(11):2863-2870.Yu Yang,Xu Zheng,Xu Qian,et al.A control strategy for integration of permanent magnet direct-driven wind turbines through a hybrid HVDC system[J].Proceedings of the CSEE,2016,36(11):2863-2870(in Chinese).
• [15]王磊,李兴源,李宽,等.伪双极LCC-VSC型混合高压直流输电系统向无源网络供电的研究[J].电力系统保护与控制,2015,43(21):27-33.Wang Lei,Li Xingyuan,Li Kuan,et al.Research of pseudo bipolar LCC-VSC hybrid HVDC system supplying passive network[J].Power System Protection and Control,2015,43(21):27-33(in Chinese).
• [16]余瑜,刘开培,陈灏泽,等.伪双极VSC-LCC型混合直流输电系统启动方法[J].高电压技术,2014,40(8):2572-2578.Yu Yu,Liu Kaipei,Chen Haoze,et al.Startup procedure for VSC-LCC based hybrid pseudo bipolar HVDC system[J].High Voltage Engineering,2014,40(8):2572-2578(in Chinese).
• [17]阳岳希,贺之渊,周杨,等.厦门?320 k V柔性直流输电工程的控制方式和运行性能[J].智能电网,2016,4(3):229-234.Yang Yuexi,He Zhiyuan,Zhou Yang,et al.Control mode and operating performance of Xiamen?320 k V VSC-HVDC project[J].Smart Grid,2016,4(3):229-234(in Chinese).
• [18]吴方劼,马玉龙,梅念,等.舟山多端柔性直流输电工程主接线方案设计[J].电网技术,2014,38(10):2651-2657.Wu Fangjie,Ma Yulong,Mei Nian,et al.Design of main connection scheme for Zhoushan flexible multi-terminal HVDC transmission project[J].Power System Technology,2014,38(10):2651-2657(in Chinese).
• [19]薛英林.适用于大容量架空线输电的C-MMC型柔性直流技术研究[D].杭州:浙江大学,2014.
• [20]吴婧,姚良忠,王志冰,等.直流电网MMC拓扑及其直流故障电流阻断方法研究[J].中国电机工程学报,2015,35(11):2681-2694.Wu Jing,Yao Liangzhong,Wang Zhibing,et al.The study of MMC topologies and their DC fault current blocking capacities in DC grid[J].Proceedings of the CSEE,2015,35(11):2681-2694(in Chinese).
• [21]孔明,汤广福,贺之渊.子模块混合型MMC-HVDC直流故障穿越控制策略[J].中国电机工程学报,2014,34(30):5343-5351.Kong Ming,Tang Guangfu,He Zhiyuan.A DC fault ride-through strategy for cell-hybrid modular multilevel converter based HVDC transmission systems[J].Proceedings of the CSEE,2014,34(30):5343-5351(in Chinese).
• [22]Qin Jiangchao,Saeedifard,Rockhill A,et al.Hybrid design of modular multilevel converters for HVDC systems based on various submodule circuits[J].IEEE Transactions on Power Delivery,2015,30(1):385-394.
• [23]Zeng Rong,Xu Lie,Yao Liangzhong,et al.Design and operation of a hybrid modular multilevel converter[J].IEEE Transactions on Power Electronics,2015,30(3):1137-1146.
• [24]Li Rui,Adam G P,Holliday D,et al.Hybrid cascaded modular multilevel converter with DC fault ride-through capability for the HVDC transmission system[J].IEEE Transactions on Power Delivery,2015,30(4):1853-1862.
• [25]Hu Jiabing,Xu Kecheng,Lin Lei,et al.Analysis and enhanced control of hybrid-MMC-based HVDC systems during asymmetrical DC voltage faults[J].IEEE Transactions on Power Delivery,2017,32(3):1394-1403.
• [26]Yu Xinyu,Wei Yingdong,Jiang Qirong,et al.A novel hybrid-arm bipolar MMC topology with DC fault ride-through capability[J].IEEE Transactions on Power Delivery,2017,32(3):1404-1413.
• [27]董云龙,汪楠楠,田杰,等.一种新型模块化多电平换流器[J].电力系统自动化,2016,40(1):116-121.Dong Yunlong,Wang Nannan,Tian Jie,et al.A novel modular multilevel converter[J].Automation of Electric Power Systems,2016,40(1):116-121(in Chinese).
• [28]石璐,苑宾,赵成勇,等.适用于架空线路的全桥模块化多电平换流器启动策略[J].南方电网技术,2016,10(4):30-36.Shi Lu,Yuan Bin,Zhao Chengyong,et al.Startup strategy of full-bridge modular multilevel converter for overhead lines.Southern Power System Technology,2016,10(4):30-36(in Chinese).
• [29]赵成勇,许建中,李探.全桥型MMC-MTDC直流故障穿越能力分析[J].中国科学:技术科学,2013,(1):106-114.Zhao Chengyong,Xu Jianzhong,Li Tan.DC faults ride-through capability analysis of full-bridge MMC-MTDC system[J].Science China:Technological Sciences,2013,(1):106-114(in Chinese).
• [30]Merlin M M C,Green T C,Mitcheson P D,et al.The alternate arm converter:a new hybrid multilevel converter with DC-fault blocking capability[J].IEEE Transactions on Power Delivery,2014,29(1):310-317.
• [31]Merlin M M C,Green T C,Mitcheson P D,et al.A new hybrid multi-level voltage-source converter with dc fault blocking capability[C]//9th Institution of Engineering and Technology International Conference on AC and DC Power Transmission.London,UK:Curran Associates,Inc.,2010:19-21.
• [32]薛英林,徐政,王峰.基于三次谐波电流注入的AAMC电容电压均衡策略[J].电工技术学报,2013,28(9):104-111.Xue Yinglin,Xu Zheng,Wang Feng.Capacitor voltage balancing strategy base on third harmonic current injection for the alternatearm multilevel converter[J].Transactions of China Electrotechnical Society,2013,28(9):104-111(in Chinese).
• [33]Adam G P,Ahmed K H,Finney S J,et al.New breed of network fault-tolerant voltage-source-converter HVDC transmission system[J].IEEE Transactions on Power Systems,2013,28(1),335-346.
• [34]Xue Yinglin,Xu Zheng,Tu Qingrui.Modulation and control for a new hybrid cascaded multilevel converter with DC blocking capability[J].IEEE Transactions on Power Delivery,2012,27(4):2227-2237.
• [35]Sharifabadi K,Harnefors L,Nee H P,et al.Design,control,and application of modular multilevel converters for HVDC transmission system[M].UK:John Wiley&Sons,Inc.,2016.
• [36]张哲任,徐政,薛英林,等.LCC-MMC混合直流输电系统直流侧谐波电流计算[J].电力系统自动化,2014,38(23):65-70.Zhang Zheren,Xu Zheng,Xue Yinglin,et al.Calculation of DC side harmonics currents for LCC-MMC hybrid HVDC transmission system[J].Automation of Electric Power Systems,2014,38(23):65-70(in Chinese).
• [37]郭春义,赵成勇,彭茂兰,等.一种具有直流故障穿越能力的混合直流输电系统[J].中国电机工程学报,2015,35(17):4345-4352.Guo Chunyi,Zhao Chengyong,Peng Maolan,et al.A hybrid HVDC system with DC fault ride-through capability[J].Proceedings of the CSEE,2015,35(17):4345-4352(in Chinese).
• [38]Xu Zheng,Wang Shijia,Xiao Huangqing.Hybrid high-voltage direct current topology with line commutated converter and modular multilevel converter in series connection suitable for bulk power overhead line transmission[J].IET Power Electronics,2016,9(12):2307-2317.
• [39]Li Xiaoqian,Liu Wenhua,Song Qiang,et al.Protection of nonpermanent faults on DC overhead lines in MMC-based HVDC systems[J].IEEE Trans on Power Delivery,2013,28(1):483-490.
• [40]Debnath S,Qin Jiangchao,Bahrani B,et al.Operation,control,and applications of the modular multilevel converter:A review[J].IEEE Transactions on Power Electronics,2015,30(1):37-53.