面向不间断供电的多端交直流混合配电网控制策略
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摘要
交直流混合配电网能便捷高效地接入各种交直流设备,将是未来配电网的发展方向之一,其运行控制策略是保证系统稳定、可靠运行的基础。基于多端直流互联结构的交直流混合配电网,研究主从控制模式和下垂控制模式下的各换流站的控制策略,以及换流站交流侧故障和恢复并网过程中重要负荷的不间断供电方法。通过Matlab/Simulink搭建多端交直流混合配电网测试模型,结合该文提出的协调控制策略进行仿真算例分析,验证了其可行性和有效性。
The AC/DC hybrid power distribution network can easily and efficiently access various kinds of AC/DC devices. It is also one of the future development orientations for distribution networks. Therefore, its control strategy is the foundation to ensure the stability and reliability of system. Based on the AC/DC hybrid power distribution network with the multi-terminal DC interconnection structure, this paper studies the control strategies of each converter station in master-slave control mode and droop control mode. Then, the uninterrupted power supplication is investigated for the cases of the AC side fault and the recovery process of converter station. Finally, the testing model of multi-terminal AC/DC hybrid power distribution network is built through the Matlab/Simulink platform to verify the feasibility and effectiveness of proposed coordinated control strategy.
The AC/DC hybrid power distribution network can easily and efficiently access various kinds of AC/DC devices. It is also one of the future development orientations for distribution networks. Therefore, its control strategy is the foundation to ensure the stability and reliability of system. Based on the AC/DC hybrid power distribution network with the multi-terminal DC interconnection structure, this paper studies the control strategies of each converter station in master-slave control mode and droop control mode. Then, the uninterrupted power supplication is investigated for the cases of the AC side fault and the recovery process of converter station. Finally, the testing model of multi-terminal AC/DC hybrid power distribution network is built through the Matlab/Simulink platform to verify the feasibility and effectiveness of proposed coordinated control strategy.
引文
[1]陈丽安,赵航,肖业湘,等.交直流混合有源配电系统保护方案研究[J].电力科学与技术学报,2015,30(3):31-39.CHEN Li-an,ZHAO Hang,XIAO Ye-xiang,et al.Protection scheme for hybrid AC/DC power distribution system[J].Journal of Electric Power Science and Technology,2015,30(3):31-39.
[2]栾会,王丹,毛承雄,等.直流配电系统的运行与控制[J].水电能源科,2012,30(9):161-164.LUAN Hui,WANG Dan,MAO Cheng-xiong,et al.Operation and control of DC distribution system[J].Water Resources and Power,2012,30(9):161-164.
[3]江道灼,郑欢.直流配电网研究现状与展望[J].电力系统自动化,2012,36(8):98-104.JIANG Dao-zhuo,ZHENG Huan.Research status and developing prospect of DC distribution network[J].Automation of Electric Power Systems,2012,36(8):98-104.
[4]陆晓楠,孙凯,Josep Guerrero,等.适用于交直流混合微电网的直流分层控制系统[J].电工技术学报,2013,28(4):35-42.LU Xiao-nan,SUN Kai,Guerrero Josep,et al.DC hierarchical control system for microgrid applications[J].Transactions of China Electrotechnical Society,2013,28(4):35-42.
[5]Lu X,Guerrero J M,Sun K,et al.Hierarchical control of parallel AC-DC converter interfaces for hybrid microgrids[J].IEEE Transactions on Smart Grid,2014,5(2):683-692.
[6]唐磊,曾成碧,苗虹,等.交直流混合微电网中AC/DC双向功率变流器的新控制策略[J].电力系统保护与控制,2013,41(14):13-18.TANG Lei,ZENG Cheng-bi ,MIAO Hong,et al.One novel control strategy of the AC/DC bi-directional power converter in micro-grid[J].Power System Protection and Control,2013,41(14):13-18.
[7]Akbari M,Golkar M A,Tafreshi S M M.Firefly algorithm-based voltage and frequency control of a hybrid AC-DC microgrid[C].Electrical Power Distribution Networks (EPDC),2012 Proceedings of 17th Conference on,Tehran,Iran,2012.
[8]Liu X,Wang P M,Loh P C.A hybrid AC/DC microgrid and its coordination control[J].IEEE Transations on Smart Grid,2011,2(2):278-286.
[9]刘龙龙,马晓春.VSC-MTDC输电系统的新型混合式控制策略[J].中国电力,2014,47(8):51-56.LIU Long-long,MA Xiao-chun.A novel hybrid control strategy for VSC-MTDC transmission system[J].Electric Power,2014,47(8):51-56.
[10]刘佳易,秦文萍,韩肖清,等.交直流双向功率变换器的改进下垂控制策略[J].电网技术,2014,38(2):304-310.LIU Jia-yi,QIN Wen-ping,HAN Xiao-qing,et al.Control method of interlink-converter in DC microgrid[J].Power System Technology,2014,38(2):304-310.
[11]Li G,Li G,Zhao C,et al.Research on voltage source converter based DC distribution network[C].2007 2nd IEEE Conference on Industrial Electronics and Applications,Harbin,China,2007.
[12]王颢雄,马伟明,肖飞,等.双dq变换软件锁相环的数学模型研究[J].电工技术学报,2011,26(7):237-241.WANG Hao-xiong,MA Wei-ming,XIAO Fei,et al.Study of model of software phase locked-loop based on dual-dq synchronous transform[J].Transactions of China Electrotechnical Society,2011,26(7):237-241.
[13]Rouzbehi K,Candela J I ,Luna A,et al.Flexiblecontrol of power flow in multiterminal DC grids using DC-DC converter[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2016,4(3):1 135-1 144.
[2]栾会,王丹,毛承雄,等.直流配电系统的运行与控制[J].水电能源科,2012,30(9):161-164.LUAN Hui,WANG Dan,MAO Cheng-xiong,et al.Operation and control of DC distribution system[J].Water Resources and Power,2012,30(9):161-164.
[3]江道灼,郑欢.直流配电网研究现状与展望[J].电力系统自动化,2012,36(8):98-104.JIANG Dao-zhuo,ZHENG Huan.Research status and developing prospect of DC distribution network[J].Automation of Electric Power Systems,2012,36(8):98-104.
[4]陆晓楠,孙凯,Josep Guerrero,等.适用于交直流混合微电网的直流分层控制系统[J].电工技术学报,2013,28(4):35-42.LU Xiao-nan,SUN Kai,Guerrero Josep,et al.DC hierarchical control system for microgrid applications[J].Transactions of China Electrotechnical Society,2013,28(4):35-42.
[5]Lu X,Guerrero J M,Sun K,et al.Hierarchical control of parallel AC-DC converter interfaces for hybrid microgrids[J].IEEE Transactions on Smart Grid,2014,5(2):683-692.
[6]唐磊,曾成碧,苗虹,等.交直流混合微电网中AC/DC双向功率变流器的新控制策略[J].电力系统保护与控制,2013,41(14):13-18.TANG Lei,ZENG Cheng-bi ,MIAO Hong,et al.One novel control strategy of the AC/DC bi-directional power converter in micro-grid[J].Power System Protection and Control,2013,41(14):13-18.
[7]Akbari M,Golkar M A,Tafreshi S M M.Firefly algorithm-based voltage and frequency control of a hybrid AC-DC microgrid[C].Electrical Power Distribution Networks (EPDC),2012 Proceedings of 17th Conference on,Tehran,Iran,2012.
[8]Liu X,Wang P M,Loh P C.A hybrid AC/DC microgrid and its coordination control[J].IEEE Transations on Smart Grid,2011,2(2):278-286.
[9]刘龙龙,马晓春.VSC-MTDC输电系统的新型混合式控制策略[J].中国电力,2014,47(8):51-56.LIU Long-long,MA Xiao-chun.A novel hybrid control strategy for VSC-MTDC transmission system[J].Electric Power,2014,47(8):51-56.
[10]刘佳易,秦文萍,韩肖清,等.交直流双向功率变换器的改进下垂控制策略[J].电网技术,2014,38(2):304-310.LIU Jia-yi,QIN Wen-ping,HAN Xiao-qing,et al.Control method of interlink-converter in DC microgrid[J].Power System Technology,2014,38(2):304-310.
[11]Li G,Li G,Zhao C,et al.Research on voltage source converter based DC distribution network[C].2007 2nd IEEE Conference on Industrial Electronics and Applications,Harbin,China,2007.
[12]王颢雄,马伟明,肖飞,等.双dq变换软件锁相环的数学模型研究[J].电工技术学报,2011,26(7):237-241.WANG Hao-xiong,MA Wei-ming,XIAO Fei,et al.Study of model of software phase locked-loop based on dual-dq synchronous transform[J].Transactions of China Electrotechnical Society,2011,26(7):237-241.
[13]Rouzbehi K,Candela J I ,Luna A,et al.Flexiblecontrol of power flow in multiterminal DC grids using DC-DC converter[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2016,4(3):1 135-1 144.