建筑低压配电线路干线断线故障检测方法仿真  

Simulation of Fault Detection Method for Main Line Breakage of Low Voltage Distribution Lines in Buildings

作　　者：孙晶[1] 赵辛[1] SUN Jing;ZHAO Xin(Department of Civil Engineering,Liaoning University of Technology,Jinzhou Liaoning 121000,China)

机构地区：[1]辽宁工业大学土木建筑工程学院,辽宁锦州121000

出　　处：《计算机仿真》2020年第7期446-449,469,共5页Computer Simulation

摘　　要：针对传统低压配电线路干线断线故障检测方法存在检测效率低、误差大问题,提出新的建筑低压配电线路干线断线故障检测方法。利用串联阻抗的并联连接来构架等效电路,通过可控硅整流器增加激励电压来获得瞬态响应电流,从而得到每个频率下的谐波阻抗,根据已知线路参数、补偿电容以及故障电阻,推算出电感、电容与频率之间的反比例函数关系,并以此作为干线断线故障的检测依据,实现干线断线故障检测。仿真结果表明,新方法可有效检测断线故障,具有更高的检测效率,且检测精度高,为调度人员及时作出检修参考,提高建筑中低压配电线路的可靠性。Due to low detection efficiency and big error in traditional detection methods,this article puts forward a new method of detecting disconnection fault of trunk line in low-voltage distribution lines of building.Firstly,the parallel connection of series impedance was used to construct equivalent circuit,and then the excitation voltage was increased by silicon-controlled rectifier(SCR)to obtain the transient response current.Moreover,the harmonic impedance of each frequency was obtained.According to the known circuit parameters,compensation capacitor and fault resistance,the inverse proportional function relation among inductance,capacitance and frequency was calculated as the basis of fault detection.Finally,the disconnection fault of truck line was detected.Simulation results show that the proposed method can effectively detect the disconnection fault,with high detection efficiency and high detection accuracy.This method can provide timely maintenance reference for the dispatcher and thus to improve the reliability of distribution line in buildings.

关 键 词：低压配电 干线断线 等效阻抗 谐波电阻 

分 类 号：TP645[自动化与计算机技术—控制理论与控制工程]