吴振杰,胡晨,陈海燕,金楷,唐爱红,王潜,马伟
WU Zhenjie,HU Chen,CHEN Haiyan,JIN Kai,TANG Aihong,WANG Qian,MA Wei

• 1:国网浙江省电力有限公司杭州供电公司
• 2:武汉理工大学自动化学院

摘要(Abstract)：

分布式电源在配电网中的渗透率不断提升，常规电流差动保护存在适应性不足的问题。为此，对不同类型的分布式电源在故障时刻输出的正序电流分量进行分析，提出了一种基于双比例补偿系数的有源配电网电流差动保护方案。该方案构建了制动系数及故障电流相量的补偿系数，通过补偿调整两侧正序电流故障分量的相位和幅值，使得区内故障时正序电流故障分量更容易向幅相平面的动作区域移动，而区外故障时可靠不动作。最后，通过在PSCAD/EMTDC仿真软件上搭建有源配电网模型测试所提保护方案在不同故障情况下的有效性，仿真实验结果表明所提保护方案提高了电流差动保护的灵敏性与可靠性。
The increasing penetration of distributed generation(DG) in distribution networks has exposed poor adaptation of conventional differential current protection schemes. To address this issue, an analysis of the positivesequence current components output by various types of DGs during faults is conducted. A differential current protection scheme for active distribution networks with dual proportional compensation coefficients is proposed. The scheme constructs braking coefficients and compensation coefficients for fault current phasors, adjusting the phase and magnitude of the positive-sequence current fault components on both sides. This adjustment helps the positivesequence current components move more easily into the action region of the amplitude-phase plane during internal faults, while ensuring reliable non-operation during external faults. Finally, the proposed protection scheme's effectiveness under different fault conditions is tested using a model of an active distribution network established in PSCAD/EMTDC. The simulation results demonstrate that the proposed scheme improves both the sensitivity and reliability of differential current protection.

关键词(KeyWords)： 有源配电网;分布式电源;差动保护;幅相关系;电流幅值比;电流相位差;双比例补偿系数
active distribution network;DG;differential protection;amplitude-phase relationship;current amplitude ratio;current phase difference;dual proportional compensation coefficients

Abstract:

Keywords:

基金项目(Foundation): 湖北省重点研发计划项目（2023BAB111）;; 国网浙江省电力有限公司科技项目（B311HZ23000P）

作者(Author): 吴振杰,胡晨,陈海燕,金楷,唐爱红,王潜,马伟
WU Zhenjie,HU Chen,CHEN Haiyan,JIN Kai,TANG Aihong,WANG Qian,MA Wei

DOI: 10.19585/j.zjdl.202412011

参考文献(References)：

• [1]叶远波，章昊，王同文，等.基于电压行波极性特征的新能源送出线路保护方案[J].电力工程技术，2024,43(1):127-135.YE Yuanbo,ZHANG Hao,WANG Tongwen,et al.Renewable energy line protection based on voltage traveling wave polarity[J].Electric Power Engineering Technology,2024,43(1):127-135.
• [2]辛保安，李明节，贺静波，等.新型电力系统安全防御体系探究[J].中国电机工程学报，2023,43(15):5723-5732.XIN Baoan,LI Mingjie,HE Jingbo,et al.Research on security defense system of new power system[J].Proceedings of the CSEE,2023,43(15):5723-5732.
• [3]詹惠瑜，刘科研，盛万兴，等.有源配电网故障诊断与定位方法综述及展望[J].高电压技术，2023,49(2):660-671.ZHAN Huiyu,LIU Keyan,SHENG Wanxing,et al. Review and prospects of fault diagnosis and location method in active distribution network[J].High Voltage Engineering,2023,49(2):660-671.
• [4] XU L,FAN S H,ZHANG H,et al.Enhancing resilience and reliability of active distribution networks through accurate fault location and novel pilot protection method[J].Energies,2023,16(22):7547.
• [5]李瀚霖，靳维，梁睿，等.基于故障信息自同步的有源配电网纵联保护[J].电力工程技术，2021,40(6):121-126.LI Hanlin,JIN Wei,LIANG Rui,et al.The pilot protection for active distribution network based on fault information self-synchronizes[J]. Electric Power Engineering Technology,2021,40(6):121-126.
• [6] WANG Q,ZHAO B,REN B X,et al.Synthetic load modelling considering the influence of distributed generation[J].Energy Reports,2023,9:662-669.
• [7]盛万兴，刘科研，李昭，等.新型配电系统形态演化与安全高效运行方法综述[J].高电压技术，2024,50(1):1-18.SHENG Wanxing,LIU Keyan,LI Zhao,et al.Review of basic theory and methods of morphological evolution and safe&efficient operation of new distribution system[J].High Voltage Engineering,2024,50(1):1-18.
• [8]涂崎，沈冰，邹晓峰，等.5G环境下配网差动保护采样数据缺失应对策略[J].电力工程技术，2022,41(3):143-151.TU Qi,SHEN Bing,ZOU Xiaofeng,et al. Countermeasures for current differential protection in 5G-based active distribution network under sampling data missing scenario[J].Electric Power Engineering Technology,2022,41(3):143-151.
• [9]张烈，郭鹏，李仲青，等.电力系统适应新型电力系统的继电保护综合评价方法[J].电网技术，2024,48(4):1633-1644.ZHANG Lie,GUO Peng,LI Zhongqing,et al.A comprehensive evaluation method for relay protection adapted to new electric power system[J].Power system technology,2024,48(4):1633-1644.
• [10]和敬涵，王语然，李猛，等.基于电流波形畸变特征的高比例光伏配电网故障方向判别原理[J].电网技术，2023,47(12):4856-4867.HE Jinghan,WANG Yuran,LI Meng,et al.New fault direction identification based on current distortion characteristics in high proportion PV distribution system[J].Power system technology,2023,47(12):4856-4867.
• [11]魏东辉，于舜尧，房俊龙.基于综合序电流的含光伏电源配电网纵联保护方案[J].太阳能学报，2021,42(7):185-192.WEI Donghui,YU Shunyao,FANG Junlong.Pilot protection scheme based on integrated sequence current for distribution metwork with photovoltatic[J].Acta Energiae Solaris Sinica,2021,42(7):185-192.
• [12] LIN X N,MA X,WANG Z X,et al.A novel current amplitude differential protection for active distribution network considering the source-effect of IM-type unmeasurable load branches[J]. International Journal of Electrical Power&Energy Systems,2021,129:106780.
• [13]于成澳，高湛军，刘朝，等.基于自适应制动补偿系数的有源配电网电流纵联差动保护[J].电力系统保护与控制，2023,51(17):1-14.YU Cheng′ao,GAO Zhanjun,LIU Zhao,et al.A current longitudinal differential protection method based on adaptive braking compensation coefficient for active distribution networks[J].Power System Protection and Control,2023,51(17):1-14.
• [14]梁营玉，卢正杰.基于补偿系数的有源配电网自适应电流差动保护[J].电网技术，2022,46(6):2268-2275.LIANG Yingyu,LU Zhengjie.Adaptive differential protection principle based on compensation coefficient for active distribution network[J].Power System Technology,2022,46(6):2268-2275.
• [15]徐萌，邹贵彬，高磊，等.含逆变型分布式电源的配电网正序阻抗纵联保护[J].电力系统自动化，2017,41(12):93-99.XU Meng,ZOU Guibin,GAO Lei,et al.Pilot protection of positive sequence impedance for distribution network with inverter-based distributed generator[J]. Automation of Electric Power Systems,2017,41(12):93-99.
• [16] JIN W,ZHANG S,LI J,et al.A novel differential protection scheme for distribution lines under weak synchronization conditions considering DG characteristics[J]. IEEE Access,2023,11:86561-86574.
• [17]高维良，高厚磊，徐彬，等.5G用作配电网差动保护通道的可行性分析[J].电力系统保护与控制，2021,49(8):1-7.GAO Weiliang,GAO Houlei,XU Bin,et al. Feasibility analysis of adopting 5G in differential protection of distribution networks[J]. Power System Protection and Control,2021,49(8):1-7.
• [18]张建雨，姜睿智，李俊刚，等.基于5G通信的配电网差动保护技术研究[J].电力系统保护与控制，2021,49(7):17-23.ZHANG Jianyu,JIANG Ruizhi,LI Jungang,et al. Research on differential protection of a distribution network based on 5G communication[J].Power System Protection and Control,2021,49(7):17-23.
• [19]高厚磊，徐彬，向珉江，等.5G通信自同步配网差动保护研究与应用[J].电力系统保护与控制，2021,49(7):1-9.GAO Houlei,XU Bin,XIANG Minjiang,et al.Research and application of self-synchronized differential protection for distribution networks using 5G as the communication channel[J].Power System Protection and Control,2021,49(7):1-9.
• [20]杨洋，李胜文，陈晓乾，等.基于故障序电流幅相特性的含分布式电源配电网纵联保护方案[J].太原理工大学学报，2024,55(1):93-101.YANG Yang,LI Shengwen,CHEN Xiaoqian,et al.Longitudinal protection scheme for distribution network with distributed power based on amplitude and phase characteristics of fault sequence current[J].Journal of Taiyuan University of Technology,2024,55(1):93-101.
• [21]李潇雨，何晋，孙琮岳.含逆变型分布式电源的配电网新型纵联保护[J].重庆理工大学学报（自然科学），2023,37(12):276-283.LI Xiaoyu,HE Jin,SUN Chongyue,et al.Novel pilot protection for distribution networks with inverter interfaced distributed generation[J].Journal of chongqing university of technology(natural science),2023,37(12):276-283.
• [22]黄纯，刘鹏辉，江亚群，等.基于动态时间弯曲距离的主动配电网馈线差动保护[J].电工技术学报，2017,32(6):240-247.HUANG Chun,LIU Penghui,JIANG Yaqun,et al.Feeder differential protection based on dynamic time warping distance in active distribution network[J].Transactions of China Electrotechnical Society,2017,32(6):240-247.
• [23] CHEN G B,LIU Y Q,YANG Q F.Impedance differential protection for active distribution network[J]. IEEE Transactions on Power Delivery,2020,35(1):25-36.