配电自动化系统故障智能检测技术探讨  

Research on fault intelligent detection technology of distribution automation system

作　　者：程道卫[1] 戴诗容[2] CHEN Daowei;DAI Shirong(Hefei Power Supply Company,Hefei Anhui,230022;Anhui Water and Hydropower Vocational Technical College,Hefei Anhui ,230022)

机构地区：[1]合肥供电公司,安徽合肥230022 [2]安徽水利水电职业技术学院,安徽合肥230022

出　　处：《自动化与仪器仪表》2018年第12期155-158,共4页Automation & Instrumentation

摘　　要：传统的双端测距法利用线路内部故障产生的初始行波,到达线路两测量端的绝对时间之差,计算配电自动化故障发生位置,存在故障检测准确率低的问题。因此,研究新的配电自动化故障智能检测方法,采用中性点不接地单向接地故障检测法,依据零序电压和电流夹角等因素来确定配电自动化系统故障发生位置,通过基于无线传感器的故障智能检测方法,对故障检测结果实施进一步优化,基于无线传感器消弧线圈参数的变动造成电抗值、配电自动化系统零序电压和零序电流改变的情况,若消弧线圈参数发生变动,并处于一致的零序电压下,故障发生点前的电流会显著降低,故障点后的电流不发生变化,依据该特点对配电自动化系统故障发生的位置实施精准判定。实验结果说明,所提方法能提高配电自动化系统的生命周期和安全性,增强故障检测结果的正确率。Traditional end-to-end distance measurement method using line internal fault of initial traveling wave arrival two measuring the absolute time line,the difference between the calculation of distribution automation failure position,has the problem that fault detection accuracy is low. So the new distribution automation intelligent fault detection method,the neutral point grounding uni-directional ground fault test,according to the factors such as Angle of zero sequence voltage and current failure location to determine the distribution automation system,through the intelligent fault detection method based on wireless sensor,further optimization,the result of the fault detection based on wireless sensor changes caused reactance value of arc suppression coil parameters,distribution automation system of zero sequence voltage and zero sequence current change situation,if the arc suppression coil parameters change,and is consistent with the zero sequence voltage,can significantly reduce the failure point in front of the current,current does not change after the point of failure,according to the characteristics of distribution automation system fault location accurate judgement. The experimental results show that the proposed method can improve the life cycle and safety of the power distribution automation system,and improve the accuracy of the fault detection results.

关 键 词：配电自动化 故障 智能检测 中性点 不接地 传感器 

分 类 号：TM76[电气工程—电力系统及自动化]