面向闭环运行配电网的广域保护控制方案
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摘要
针对配电网采用闭环运行方式导致的功率双向流动问题,该文提出一套面向闭环运行配电网广域保护控制方案。该方案由广域保护控制装置(Wide Area Protection and Control Device,WAPCD)、一体化配电终端(Integrated Distribution Terminal,IDT)构成并进行信息交互、协同判断,并采用基于差动范围可扩展的保护原理和基于负荷灵敏度的负荷联切方法,实现闭环运行配电网所有元件的差动保护和故障跳闸后负荷均分的自愈控制功能。最后,与传统闭环配电网保护控制方案对比分析,说明该方案具有对网络拓扑变化的自适应、自愈控制以及可观可控的优势。
Aiming at the problem that Closed-loop distribution network leads to power flowing in both directions, a wide area protection and control scheme is proposed based on information sharing. It includes wide area protection control devices and integrated distribution terminals. By utilizing the devices, the overall information is then collected and analyzed. The extensible differential protection principle and load resection method is employed succesfully. And the differential protection of all components and self-healing control of load distribution is realized based on the load sensitivity after fault trip of closed-loop distribution network. Finally, the wide area protection and control scheme is compared with the traditional scheme. It is shown that the wide area protection and control scheme has the advantages of observable, controllable, self-adaptive and self-healing control for network topology change.
Aiming at the problem that Closed-loop distribution network leads to power flowing in both directions, a wide area protection and control scheme is proposed based on information sharing. It includes wide area protection control devices and integrated distribution terminals. By utilizing the devices, the overall information is then collected and analyzed. The extensible differential protection principle and load resection method is employed succesfully. And the differential protection of all components and self-healing control of load distribution is realized based on the load sensitivity after fault trip of closed-loop distribution network. Finally, the wide area protection and control scheme is compared with the traditional scheme. It is shown that the wide area protection and control scheme has the advantages of observable, controllable, self-adaptive and self-healing control for network topology change.
引文
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[3]和敬涵,李文立,张大海,等.基于节点分支电流幅值的含DG配网差动保护原理[J].电网技术,2018,42(11):3 601-3 609.HE Jing-han,LI Wen-li,ZHANG Da-hai,et al.Differential protection scheme based on current amplitude of branch node for distribution network with DG[J].Power System Technology,2018,42(11):3 601-3 609.
[4]潘美,杨国稳,燕莎莎,等.基于保护信息优先级的新型广域保护算法[J].电力科学与技术学报,2017,32(1):71-77.PAN Mei,YANG Guo-wen,YAN Sha-sha,et al.A novel wide-area protection algorithm based on protection information priority[J].Journal of Electric Power Science and Technology,2017,32(1):71-77.
[5]党存禄,张佳宾.基于故障相关度的广域继电保护故障定位方法[J].电力科学与技术学报,2015,30(1):60-66.DANG Cun-lu,ZHANG Jia-bin.Fault location method in wide-area protection based on fault correlation degree[J].Journal of Electric Power Science and Technology,2015,30(1):60-66.
[6]冯英伟,刘玉英.含微网的智能配电网故障自愈技术的研究[J].电源技术,2014,38(7):1 335-1 336.FENG Ying-wei,LIU Yu-ying.Study on fault self-healing techniques for smart power distribution networks with microgrid[J].Power Technology,2014,38(7):1 335-1 336.
[7]施慎行,董新洲,吴家华,等.配电线路单相接地故障自愈方案[J].电力自动化设备,2012,32(11):97-101.SHI Shen-xing,DONG Xin-zhou,WU Jia-hua,et al.Self-healing of single-phase grounding fault for power distribution lines[J].Electric Power Automation Equipment,2012,32(11):97-101.
[8]何仰赞,温增银.电力系统分析(下册)[M].武汉:华中科技大学出版社,2016.
[9]张项安,张新昌,李卫星,等.基于差动保护的配电网闭环运行方式探讨[J].电力系统保护与控制,2013,41(3):102-106.ZHANG Xiang-an,ZHANG Xin-chang,LI Wei-xing,et al.On the closed-loop operation mode for differential protection-based distribution networks[J].Power System Protection and Control,2013,41(3):102-106.
[10]封士永,王江宁,周磊,等.配电网邻域速动型分布式馈线自动化策略及仿真分析[J].电力科学与技术学报,2015,30(4):96-104.FENG Shi-yong,WANG Jiang-ning,ZHOU Lei,et al.Neighborhood quick distributed feeder automation strategy and its simulation analysis for distribution networks[J].Journal of Electric Power Science and Technology,2015,30(4):96-104.
[11]赵晓慧,梁标,李海波,等.城市配网自动化可靠性评估与成本效益分析[J].电力科学与技术学报,2015,30(1):73-79.ZHAO Xiao-hui,LIANG Biao,LI Hai-bo,et al.Reliability assessment and cost-benefit analysis of urban distribution network automation[J].Journal of Electric Power Science and Technology,2015,30(1):73-79.