Analysis and Comparison of DC Fault Handling Strategies for Hybrid HVDC System

doi:10.3969/j.issn.1000-7229.2017.08.005

Abstract

Abstract: ABSTRACT： The hybrid high voltage direct current （hybrid HVDC） transmission system based on line commutated converter （LCC） and modular multilevel converter （MMC） is a feasible solution for long distance bulk power transmission. In order to handle the DC short-circuit fault, two kinds of methods can be adopted. The first one is to use the sub-modules （SMs） which have the capability of DC-fault clearance in inverter side converter, such as full-bridge SMs and clamp-double SMs. The second one is to arrange high-power diode at the MMC DC port to cut off the current flow path after the fault. Through analyzing the physical mechanism and control flow of different DC fault handling strategies, this paper studies its feasibility and applicability. The typical testing system is built in PSCAD/EMTDC, the system response under DC fault is investigated, and the system transient characteristics under different strategies are compared. In addition, the non-block DC-fault-handling strategy based on full-bridge SMs is simulated and verified. The results show that this kind of solution is not suitable for the bipolar HVDC system and the DC fault current can not be blocked thoroughly.

Key words: line commutated converter （LCC）, modular multilevel converter （MMC）, hybrid high voltage direct current transmission system, DC fault, non-block DC-fault-handling strategy

CLC Number:

TM 722

LU Yi, LI Jihong, QIU Peng, XIAO Huangqing, LIU Gaoren, XU Zheng. Analysis and Comparison of DC Fault Handling Strategies for Hybrid HVDC System[J]. Electric Power Construction, 2017, 38(8): 33-.

References

［1］徐政. 交直流电力系统动态行为分析［M］. 北京：机械工业出版社，2004：1-10.
［2］赵婉君. 高压直流输电工程技术［M］. 北京：中国电力出版社，2004：14-16.
［3］郭春义，张岩坡，赵成勇，等. STATCOM 对双馈入直流系统运行特性的影响［J］. 中国电机工程学报，2013，33（25）：99-106.
GUO Chunyi, ZHANG Yanpo, ZHAO Chengyong, et al. Impact of STATCOM on the operating characteristics of double-infeed HVDC system［J］. Proceedings of the CSEE, 2013, 33（25）: 99-106.
［4］孔明，汤广福，贺之渊，等. 模块化多电平HVDC 输电系统功率运行区间的优化方法［J］. 中国电机工程学报，2013，33（21）：45-52.
KONG Ming, TANG Guangfu, HE Zhiyuan, et al. Optimization methods of operation region for modular multilevel converter based HVDC transmission systems［J］. Proceedings of the CSEE, 2013, 33（21）: 45-52.
［5］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.
［6］郭春义，赵成勇，王晶. 新型双馈入直流输电系统供电无源网络的运行特性研究［J］. 电工技术学报，2012，27（11）：211-218.
GUO Chunyi, ZHAO Chengyong, WANG Jing. Operation characteristic research on novel double-infeed HVDC system supplying passive network［J］. Transactions of China Electrotechnical Society, 2012, 27（11）: 211-218.
［7］许烽, 宣晓华, 黄晓明, 等. LCC-FMMC型混合直流输电系统的潮流反转控制策略［J］. 江苏电机工程, 2015, 34（6）: 51-55.
XU Feng, XUAN Xiaohua, HUANG Xiaoming,et al. Power flow reversal control strategy for the hybrid HVDC system based on LCC and FMMC［J］. Jiangsu Electrical Engineering, 2015, 34（6）: 51-55.
［8］周煜智, 徐政, 唐庚. 三种MMC-HVDC直流故障处理方法下电力系统暂态稳定性分析［J］. 中国电机工程学报, 2015, 35（7）:1621-1627.
ZHOU Yuzhi，XU Zheng，TANG Geng．Analysis of power system transient stability characteristics under three different DC line fault clearance solutions of MMC-HVDC systems［J］. Proceedings of the CSEE，2015，35（7）：1621-1627．
［9］郭春义, 赵成勇, ALLAN Montanari, 等. 混合双极高压直流输电系统的特性研究［J］. 中国电机工程学报, 2012, 32（10）: 98-104.
GUO Chunyi, ZHAO Chengyong, ALLAN Montanari, et al. Investigation of hybrid bipolar HVDC system performances［J］. Proceedings of the CSEE, 2012, 32（10）:98-104.
［10］CHEN X, SUN H, WEN J, et al. Integrating wind farm to the grid using hybrid multiterminal HVDC technology［J］. IEEE Transactions on Industry Applications, 2011, 47（2）: 965-972.
［11］ROHNER S, BERNET S, HILER M, et al. Modulation, losses, and semiconductor requirements of modular multilevel converters ［J］. IEEE Transactions on Industry Electronics, 2010, 57（8）: 2633-2642.
［12］MARQUARDT R. Stromrichterschaltungen mit verteilten energiespeichern: Germany, DE 10103031A1 ［P］. 2001-01-24.
［13］GLINKA M, MARQUARDT, R. A new AC/AC multilevel converter family［J］. IEEE Transactions on Industrial Electronics, 2005,52（3）:662-669.
［14］韦延方，卫志农，孙国强，等．适用于电压源换流器型高压直流输电的模块化多电平换流器最新研究进展［J］．高电压技术，2012,38（5）:1243-1252.
WEI Yanfang, WEI Zhinong, SUN Guoqiang, et al. New prospects of modular multilevel converter applied to voltage source converter high voltage direct current transmission ［J］. High Voltage Engineering, 2012,38（5）:1243-1252.
［15］赵成勇，陈晓芳，曹春刚，等．模块化多电平换流器HVDC直流侧故障控制保护策略［J］．电力系统自动化，2011，35（23）：82-87．
ZHAO Chengyong，CHEN Xiaofang，CAO Chungang，et al．Control and protection strategies for MMC-HVDC under DC faults［J］．Automation of Electric Power Systems，2011，35（23）：82-87．
［16］AHMED N，ANGQUIST L，MEHMOOD S，et al．Efficient modeling of an MMC-based multiterminal DC system employing hybrid HVDC breakers［J］．IEEE Transactions on Power Delivery，2015，30（4）：1792-1801．
［17］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．
［18］唐庚, 徐政, 薛英林. LCC-MMC混合高压直流输电系统［J］. 电工技术学报,2013,28（10）:301-310.
TANG Geng，XU Zheng，XUE Yinglin，et al． A LCC-MMC hybrid HVDC transmission system ［J］．Transactions of China Electrotechnical Society，2013，28（ 10）: 301-310．
［19］XIAO H, XU Z, TANG G, et al. Complete mathematical model derivation for modular multilevel converter based on successive approximation approach［J］. IET Power Electronics, 2015, 8（12）: 2396-2410.
［20］XIANG W, LIN W, ZHOU G, et al. Pole-to-ground DC fault ride through control of symmetrical monopole hybrid MMC［C］//The 2nd International Conference on HVDC. Shanghai, China: CSEE and CIGRE, 2016: 1-5.

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