Research on Intelligent Protection Configuration Based on DC Breakers for Multi-terminal Flexible DC Distribution Network

doi:10.3969/j.issn.1000－7229.2018.09.008

Abstract

Abstract: In order to improve the operation reliability of multi-terminal flexible DC distribution network and shorten the time of fault impact, an intelligent protection configuration scheme based on DC circuit breaker is proposed. Firstly, the typical fault characteristics of system are analyzed from the aspects of topology, converter and load types. Subsequently, after the protection area has been divided, the complete protection principle, the layered configuration and the DC line fault line selection method is developed. By cooperating with the operation logic of primary equipment and secondary control system, a protection scheme with self-switching dynamic settings, quick system recovery after fault, and accurate fault line selection is configured, which can be adapted to different operation modes. Finally, a digital simulation model of three-terminal flexible DC distribution network is built in PSCAD software and the protection response characteristics under typical failures are tested, which verifies the effectiveness of the proposed protection scheme.

Key words: flexible DC, multi-terminal DC distribution network, fault feature, protection configuration

CLC Number:

TM 72

XU Yutao, TAN Zhukui, XIE Baiming, HUANG Hui, LU Qiansu1 BAN Guobang, YUAN Xufeng. Research on Intelligent Protection Configuration Based on DC Breakers for Multi-terminal Flexible DC Distribution Network[J]. Electric Power Construction, 2018, 39(9): 61-69.

References

［1］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.

［2］徐政. 柔性直流输电系统［M］. 北京: 机械工业出版社, 2014.

［3］宋强,赵彪,刘文华,等．智能直流配电网研究综述［J］．中国电机工程学报,2013,33（25）：9-19.

SONG Qiang, ZHAO Biao, LIU Wenhua, et al．An overview of research on smart DC distribution power network［J］．Proceedings of the CSEE, 2013, 33（25）：9-19．

［4］齐可延,袁旭峰,邹晓松,等. 直流配电网络形态分析［J］. 贵州电力技术, 2017, 20（3）: 1-7.

QI Keyan, YUAN Xufeng, ZOU Xiaosong, et al. An analysis of DC distribution network structural form ［J］. Guizhou Electric Power Technology, 2017, 20（3）: 1-7.

［5］姜世公,吴志力,李红军,等. 直流配电电压等级及负荷距分析［J］. 电力建设, 2017,38（6）:58-65.

JIANG Shigong, WU Zhili, LI Hongjun, et al. Voltage stage and load distance for DC distribution network ［J］．Electric Power Construction, 2014,38（4）:58-65．

［6］胡竞竞,徐习东,裘鹏,等．直流配电系统保护技术研究综述［J］. 电网技术, 2014, 38（4）: 844-851.

Hu Jingjing, Xu Xidong, Qiu Peng, et al. A review of the protection methods in DC distribution system［J］．Power System Technology, 2014, 38（4）: 844-851．

［7］吴海涛, 王世祥. 柔性直流智能配电网的保护配置与动作策略研究［J］. 电力大数据, 2018, 21（2）: 74-81.

WU Haitao, WANG Shixiang. Analysis of protection configuration and action strategy on flexible DC transmission and distribution network in megalopolis ［J］. Power System and Big Data, 2018, 21（2）: 74-81.

［8］季一润,袁志昌,赵剑锋,等．一种适用于柔性直流配电网的电压控制策略［J］．中国电机工程学报,2016,36（2）:335-341.

JI Yirun, YUAN Zhicahng, ZHAO Jianfeng, et al．A suitable voltage control strategy for DC distribution power network ［J］．Proceedings of the CSEE,2016,36（2）:335-341．

［9］李斌,何佳伟.柔性直流配电网故障分析及限流方法［J］. 中国电机工程学报, 2010, 30（19）: 3026-3038.

LI Bin, HE Jiawei. DC fault analysis and current limiting technique for VSC-based DC distribution system ［J］. Proceedings of the CSEE, 2010, 30（19）: 3026-3038.

［10］孙刚, 时伯年, 赵宇明. 基于MMC的柔性直流配电网故障定位及保护配置研究［J］. 电力系统保护与控制, 2015, 43（22）:127-134.

SUN Gang, SHI Bonian, ZHAO Yuming. Research on the fault location method and protection configuration strategy of MMC based DC distribution grid ［J］. Power System Protection and Control, 2015, 43（22）:127-134.

［11］管敏渊, 徐政. 两电平 VSC-HVDC 系统直流侧接地方式选择［J］. 电力系统自动化, 2009, 33（5）:55-60.

GUAN Minyuan, XU Zheng. DC side grounding methodology for a two-level VSC HVDC system［J］. Automation of Electric Power Systems, 2009, 33（5）：55-60．

［12］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.

［13］吴峻, 武迪, 朱金大,等. 多端柔性直流配电网接地方式设计［J］. 中国电机工程学报, 2017, 37（9）: 2552-2560.

WU Jun, WU Di, ZHU Jinda, et al. Grounding method design of multi-terminal flexible DC distribution［J］. Proceedings of the CSEE, 2017,37（9）: 2552-2560.

［14］戴志辉, 葛红波, 严思齐，等. 柔性直流配电网接地方式对故障特性的影响分析［J］. 电网技术, 2017, 41（7）: 2353-2362.

DAI Zhihui, GE Hongbo, YAN Siqi, et al. Effects of grounding mode on fault characteristics in flexible dc distribution system［J］. Power System Technology, 2017, 41 （7）: 2353-2362.

［15］王姗姗, 周孝信, 汤广福, 等. 模块化多电平换流器HVDC 直流双极短路子模块过电流分析［J］. 中国电机工程学报, 2011, 31（1）: 1-7.

WANG Shanshan, ZHOU Xiaoxin, TANG Guangfu, et al. Analysis of submodule overcurrent caused by DC pole-to-pole fault in modular multilevel converter HVDC system［J］. Proceedings of the CSEE, 2011, 31（1）: 1-7.

［16］秦红霞, 孙刚, 时伯年, 等. 柔性直流配电网极间故障控制保护策略与主设备参数配合研究［J］. 电力系统保护与控制, 2016, 44（21）: 150-156.

QIN Hongxia, SUN Gang, SHI Bonian, et al. Research on control and protection strategy of MMC based DC distribution grid with interpoles fault［J］. Power System Protection and Control, 2016, 44（21）: 150-156.

［17］SANO K, TAKASAKI M. A surgeless solid-state DC circuit breaker for voltage-source-converter-based hvdc systems［J］．IEEE Transactions on Industry Applications, 2014, 50（4）：2690-2699．

［18］江道灼,张弛,郑欢, 等. 一种限流式混合直流断路器方案［J］. 电力系统自动化, 2014, 38（4）: 64-73.

JIANG Daozhuo, ZHANG Chi, ZHENG Huan, et al. A scheme for current-limiting hybrid DC circuit breaker［J］. Automation of Electric Power Systems, 2014, 38（4）: 64-73.

[1]	CHEN Mengmeng， GAO Liang， LI Yinghan. Dual-Objective Optimal Droop Control Strategy for Flexible DC Distribution Systems [J]. Electric Power Construction, 2020, 41(3): 119-126.
[2]	DONG Lei, MING Jie, MENG Tianjiao, CHEN Naishi, PU Tianjiao. Voltage Control of Active Distribution Network with Flexible DC Devices Based on Model Predictive Control [J]. Electric Power Construction, 2018, 39(7): 123-128.
[3]	ZHANG Ming, HE Jinghan, ZHANG Yizhi, LUO Guomin. Fault Location Technique for Multi-Terminal VSC-HVDC System [J]. Electric Power Construction, 2017, 38(8): 24-.
[4]	ZHANG Wei, CUI Yanyan, WEI Tao, LIU Wei, WU Tao, HUI Feixiang, HUANG Renle. Locating and Sizing Method of Flexible DC Loop Network Controller [J]. Electric Power Construction, 2017, 38(3): 48-.
[5]	CHENG Lin, WANG Ying, SONG Fulong, LUO Jinshan, LIU Manjun. Reliability Evaluation of Flexible AC/DC Hybrid Power Grid [J]. Electric Power Construction, 2017, 38(3): 55-.
[6]	XIAO Jun，LI Sicen，HUANG Renle，LI Yun，HAN Shuai. 1. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin 300072, China；2. State Grid Beijing Electric Power Company, Beijing 100031, China [J]. Electric Power Construction, 2016, 37(5): 10-20.
[7]	ZHAO Yongquan, YU Ting, HAN Wei, PU Tianjiao, HUANG Renle, MU Yunfei. Voltage Control Strategy Based on Coordinated Multiple Reactive Power Source in AC/DC Active Distribution Network [J]. Electric Power Construction, 2016, 37(5): 34-40.
[8]	DONG Lei, LU Dandan, CHEN Naishi, PU Tianjiao, WANG Xiaohui. Optimizing Scheduling of Active Distribution Network with Flexible DC Devices [J]. Electric Power Construction, 2016, 37(5): 41-49.
[9]	ZHANG Wei, WEI Tao,CUI Yanyan, LIU Wei, WANG Zongli, LI Fang, HUANG Renle. Connection Modes of AC/DC Hybrid Distribution Network Based on Flexible DC Loop Network Controller [J]. Electric Power Construction, 2016, 37(12): 32-.
[10]	LI Tianwei, LIU Dapeng, LEI Yuanyuan, ZHAO Yuming, XIANG Yang, LI Xiaolin1. Lighting Intruding Wave Overvoltage of Three-Terminal Flexible DC Transmission System [J]. ELECTRIC POWER CONSTRUCTION, 2014, 35(3): 13-17.
[11]	HOU Ting, RAO Hong, XU Shukai, LI Xiaolin, LI Yan, YI Rong, YANG Xiaoping. Valve Type Test Scheme for Flexible DC Transmission System Based on MMC [J]. ELECTRIC POWER CONSTRUCTION, 2014, 35(12): 61-66.
[12]	LI Guoyao， LIU Sheng， XU Feng， ZHOU Zhichao. Temperature Monitoring of Valve Hall Equipment in Flexible DC Converter Station [J]. ELECTRIC POWER CONSTRUCTION, 2013, 34(6): 92-97.