就地型馈线自动化反向闭锁逻辑改进策略  

An Improvement Strategy for In-Place Feeder Automation Reverse Blocking Logic

作　　者：梁耀贤 郝正航[1] 陈卓[1] 孙雨晴 燕嚎 LIANG Yaoxian;HAO Zhenghang;CHEN Zhuo;SUN Yuqing;YAN Hao(School of Electrical Engineering,Guizhou University,Guiyang 550025,Guizhou,China;Guian Power Supply Bureau,Guizhou Power Grid Co.,Ltd.,Guiyang 550031,Guizhou,China)

机构地区：[1]贵州大学电气工程学院,贵州贵阳550025 [2]贵州电网有限责任公司贵安供电局,贵州贵阳550031

出　　处：《电网与清洁能源》2023年第3期1-8,共8页Power System and Clean Energy

基　　金：教育部第二批国家级新工科研究与实践项目(ENYDQHGC20202227)。

摘　　要：通过分析基于负荷开关的首次失压不分闸电压电流时间型馈线自动化(feeder automation,FA)采用残压闭锁时,在发生无过渡电阻的相间短路故障时可能会判据失效的问题,提出合闸后Y时限内有故障电流则反向闭锁的改进方案。增设了L时限未得压则分闸逻辑,分析残压闭锁所存在的盲区。与原系统相比,所提改进方案在发生无过渡电阻的相间短路故障时能够隔离故障,提高了供电可靠性。在RT-LAB实时仿真系统中接入馈线终端,形成闭环以构建硬件在环(hardware-in-the-Loop,HIL)测试平台,并在配电线路首端、中端和末端分别设置不同类型的相间短路故障以验证方案的可行性。实验结果表明,所提方案能够提高反向闭锁成功率和配电网供电可靠性。By analyzing the phenomenon that when residual voltage lockout is adopted in the first voltage loss and nonopening voltage current time type feeder automation(FA)based on load switch,the criterion may fail in the event of interphase short circuit fault without transition resistance,an improved scheme is proposed to reverse the lockout when there is fault current within Y time limit after closing.The logic of opening when no voltage is obtained within L time limit is added to analyze the blind area of residual voltage lockout.Compared with the original system,the improved scheme proposed in this paper can isolate the fault when the interphase short circuit fault without transition resistance occurs,and improve the reliability of power supply.Finally,the feeder terminals are connected to the RT-LAB real-time simulation system to form a closed loop to build a hardware in the loop(HIL)test platform,and then different types of inter-phase short circuit faults are set at the head end,middle end and end of the distribution line to verify the feasibility of the scheme.The experimental results show that the proposed scheme can improve the success rate of reverse blocking and the power supply reliability of distribution network.

关 键 词：馈线自动化 重合闸 反向闭锁 硬件在环 

分 类 号：TM76[电气工程—电力系统及自动化]