1. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Hubei Electric Power Security and High Efficiency Key Lab (Huazhong University of Science and Technology), Wuhan 430074, Hubei Province, China; 2. TBEA China Xinjiang Sunoasis Co., Ltd., Urumqi 830011, Xinjiang Uyghur Autonomous Region, China
Abstract: To handle line faults in a DC grid, this paper proposed a new method of active current-limiting control (ACLC) based on hybrid MMC. With this active control, breaking capacity requirement of DC circuit breaker (DCCB) will significantly decrease and DC gird investment will be reduced. Firstly, independent controllability of AC/DC voltage of converter is studied. The ACLC control architecture is proposed. To avoid overvoltage of capacitor on each arm during DC fault, a method of dynamically adjusting DC current thresholds is proposed. The ACLC optimization method, i.e., target predetermined control, is put forward. Impact of different controller delay time on the ACLC is analyzed. Transient evolution mechanisms of DC fault current are studied in a single converter system and in DC grid respectively. Finally, validity of the ACLC is verified.
周猛, 向往, 林卫星, 文劲宇, 左文平. 柔性直流电网直流线路故障主动限流控制[J]. 电网技术, 2018, 42(7): 2062-2072.
ZHOU Meng, XIANG Wang, LIN Weixing, WEN Jinyu, ZUO Wenping. Active Current-Limiting Control to Handle Overhead Line Fault in DC Grid. POWER SYSTEM TECHNOLOGY, 2018, 42(7): 2062-2072.
[1] 汤广福,罗湘,魏晓光.多端直流输电与直流电网技术[J].中国电机工程学报,2013,33(10):8-17. Tang Guangfu,Luo Xiang,Wei Xiaoguang.Multi-terminal HVDC and DC-grid technology[J].Proceeding of the CSEE,2013,33(10):8-17(in Chinese). [2] 周勤勇. 亚洲电网互联模式探讨[J].电网技术,2017,41(5):1491-1497. Zhou Qinyong.Discussion on interconnection mode of Asian power grids[J].Power System Technology,2017,41(5):1491-1497(in Chinese). [3] 孙玉娇,周勤勇,申洪.未来中国输电网发展模式的分析与展望[J].电网技术,2013,37(7):1929-1935. Sun Yujiao,Zhou Qinyong,Shen Hong.Analysis and prospect on development patterns of China is power transmission network in future[J].Power System Technology,2013,37(7):1929-1935(in Chinese). [4] 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(in Chinese). [5] 吴亚楠,吕铮,贺之渊,等.基于架空线的直流电网保护方案研究[J].中国电机工程学报,2016,36(14):3726-3734. Wu Yanan,Lü Zheng,He Zhiyuan,et al.Study on the protection strategies of HVDC grid for overhead line application[J].Proceedings of the CSEE,2016,36(14):3726-3733(in Chinese). [6] 孙栩,曹士冬,卜广全,等.架空线柔性直流电网构建方案[J].电网技术,2016,40(3):678-682. Sun Xu,Cao Shidong,Bu Guangquan,et al.Construction scheme of overhead line flexible HVDC grid[J].Power System Technology,2016,40(3):678-682(in Chinese). [7] 李英彪,卜广全,王姗姗,等.张北柔直电网工程直流线路短路过程中直流过电压分析[J].中国电机工程学报,2017,37(12):3391-3399. Li Yingbiao,Bu Guangquan,Wang Shanshan,et al.Analysis of DC overvoltage caused by DC short-circuit fault in Zhangbei VSC-based DC grid[J].Proceedings of the CSEE,2017,37(12):3391-3399(in Chinese). [8] 潘垣,尹项根,胡家兵,等.论基于柔直电网的西部风光能源集中开发与外送[J].电网技术,2016,40(12):3621-3629. Pan Yuan,Yin Xianggen,Hu Jiabing,et al.Centralized exploitation and large-scale delivery of wind and solar energies in West China based on flexible DC grid[J].Power System Technology,2016,40(12):3621-3629(in Chinese). [9] 周猛,左文平,林卫星,等.电容换流型直流断路器及其在直流电网的应用[J].中国电机工程学报,2017,37(4):1045-1052. Zhou Meng,Zuo Wenping,Lin Weixing,et al.Capacitor commutated DC circuit breaker and its application in DC grid[J].Proceedings of the CSEE,2017,37(4):1045-1052(in Chinese). [10] W Zhou.Development and test of a 200 kV full-bridge based hybrid HVDC breaker[C]//2015 17th European Conference on Power Electronics and Applications(EPE'15) .Geneva:IEEE,2015:1-7. [11] 陈名,徐惠,张祖安,等.耦合型机械式高压直流断路器设计及仿真[J].高电压技术,2018,44(2):380-387. Chen Ming,Xu Hui,Zhang Zu’an,et al.Design and simulation of coupling mechanical high voltage DC circuit breaker[J].High Voltage Engineering,2018,44(2):380-387(in Chinese). [12] 魏晓光,杨兵建,汤广福.高压直流断路器技术发展与工程实践[J].电网技术,2017,41(10):3180-3188. Wei Xiaoguang,Yang Bingjian,Tang Guangfu.Technical development and engineering applications of HVDC circuit breaker[J].Power System Technology,2017,41(10):3180-3188(in Chinese). [13] 张北柔直项目启动产品招标,柔直技术将成为直流输电重要路线[EB/OL].国金证券股份有限公司,2018[2018-04-29].http://pdf.
[14] 宋国兵,陶然,李斌,等.含大规模电力电子装备的电力系统故障分析与保护综述[J].电力系统自动化,2017,41(12):2-12. Song Guobing,Tao Ran,Li Bin,et al.Survey of fault analysis and protection for power system with large scale power electronic equipments[J].Automation of Electric Power Systems,2017,41(12):2-12(in Chinese). [15] Li Xiaoqian,Liu Wenhua,Song Qiang,et al.An enhanced MMC topology with DC fault ride-through capability[C]//2013 39th Annual Conference of the IEEE Industrial Electronics Society.Vienna,Austria:IEEE,2013:6182-6188. [16] 薛英林,徐政.C-MMC直流故障穿越机理及改进拓扑方案[J].中国电机工程学报,2013,33(21):63-70. Xue Yinglin,Xu Zheng.DC fault ride-through mechanism and improved topology scheme of C-MMC[J].Proceeding of the CSEE,2013,33(21):63-70(in Chinese). [17] 向往,林卫星,文劲宇,等.一种能够阻断直流故障电流的新型子模块拓扑及混合型模块化多电平换流器[J].中国电机工程学报,2014,34(29):5171-5179. Xiang Wang,Lin Weixing,Wen Jinyu,et al.A new topology of sub-modules with DC fault current blocking capability and a new type of hybrid MMC converter[J].Proceedings of the CSEE,2014,34(29):5171-5179(in Chinese). [18] 李斌,李晔,何佳伟.具有直流故障清除能力的MMC子模块关键性能研究[J].中国电机工程学报,2016,36(8):2114-2122. Li Bin,Li Ye,He Jiawei.Research on the key properties of MMC sub-modules with DC fault Eliminating capability[J].Proceedings of the CSEE,2016,36(8):2114-2122(in Chinese). [19] Li R, Fletcher J E, Xu L, Holliday D and Williams B W.A hybrid modular multilevel converter with novel three-level cells for DC fault blocking capability[J].IEEE Transactions on Power Delivery,30(4):2017-2026. [20] 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,2013,43(1):106-114. Zhao Chengyong,Xu Jianzhong,Li Tan.DC faults ride-through capability analysis of full-bridge MMC-MTDC system[J].Science China:Technology Science,2013,43(1):106-114(in Chinese). [21] Xiang W, Lin W, Xu L and Wen J.Enhanced independent pole control of hybrid MMC-HVDC system[J].IEEE Transactions on Power Delivery,PP(99):1-1.doi:10.1109/TPWRD. 2017.2715040 [22] J.Hu,K.Xu,L.Lin and R.Zeng,“Analysis and enhanced control of Hybrid-MMC-Based HVDC systems during asymmetrical DC voltage faults[J].IEEE Transactions on Power Delivery,32(3):1394-1403. [23] 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). [24] 罗永捷,李耀华,李子欣,等.全桥型MMC-HVDC直流短路故障穿越控制保护策略[J].中国电机工程学报,2016,36(7):1933-1943. Luo Yongjie,Li Yaohua,Li Zixin,et al.DC short-circuit fault ride-through control strategy of full-bridge MMC-HVDC systems[J].Proceedings of the CSEE,2016,36(7):1933-1943(in Chinese). [25] 李少华,王秀丽,李泰,等.混合式MMC及其直流故障穿越策略优化[J].中国电机工程学报,2016,36(7):1849-1858. Li Shaohua,Wang Xiuli,Li Tai,et al.Optimal design for hybrid MMC and its DC fault ride-through strategy[J].Proceedings of the CSEE,2016,36(7):1849-1858(in Chinese). [26] Lin W,Jovcic D,Nguefeu S and Saad H.Full-Bridge MMC converter optimal design to HVDC operational requirements[J].IEEE Transactions on Power Delivery,2015,31(3):1342-1350. [27] CIGRE WG B4.52.HVDC grid feasibility study[Z].CIGRE technical brochure 533, 2013:20-40. [28] 徐政,等.柔性直流输电系统[M].北京:机械工业出版社,2017:211-229. [29] Bucher M K, Franck C M.Contribution of fault current sources in multiterminal HVDC cable networks[J].IEEE Transactions on Power Delivery,2013,28(3):1796-1803. [30] Sneath J, Rajapakse A D.Fault detection and interruption in an earthed HVDC grid using ROCOV and hybrid DC breakers[J].IEEE Transactions on Power Delivery,2015,31(3):973-981. [31] Lin Weixing, Jovcic D, Nguefeu S and Saad H.Coordination of MMC converter protection and DC line protection in DC grids[C]//2016 IEEE Power and Energy Society General Meeting (PESGM).Boston,MA:IEEE,2016:1-5.
设为首页 
加入收藏
