基于磁场探测法的电抗器匝间短路故障检测法的研究与应用  

Research and Application of Fault Detection of Reactor Turn-to-turn Short Circuit Based on Magnetic Field Detection Method

作　　者：郑宗安 ZHENG Zongan(State Grid Fujian Electric Power Co.,Ltd.,Fuzhou 350003,China)

机构地区：[1]国网福建省电力有限公司,福州350003

出　　处：《高压电器》2020年第3期217-223,共7页High Voltage Apparatus

摘　　要：干式空芯电抗器匝间短路故障发生概率大,若不及时排除,会造成严重的后果,而常用的传统检测方法存在准确度和灵敏度不足的问题。针对此问题,文中提出了一种基于磁场探测法的电抗器匝间短路故障检测方法,首先通过滑动均值平滑采样数据,再根据误差限阈控制模型判断是否发生匝间故障,实现电抗器匝间短路故障在初期和发展期的在线监控和及时准确的故障预警。工程实例验证表明:文中所提出的方法相较于传统方法,信号强度增强了50~100倍;同时,所提出方法对于是否发生匝间故障具有良好的可靠性和稳定性。综上所述,文中方法可应用于工程实际,具有广泛的推广应用价值。The probability of short circuit faults in dry-type air-core reactor is extremely high,there are always huge adverse effects if not eliminated in time.However,there exist low accuracy and sensitivity with the traditional fault detection method when detecting the early failure or minor turn-to-turn short circuit faults in dry-type air-core reactor.This paper proposes a fault detection method of turn-to-turn short circuit of dry-type air-core reactor based on magnetic field detection method.Firstly,the sampled data are smoothed by using the sliding mean method.Then,the turn-to-turn failure can be determined according to the error limit of the control model.In this way,the online monitoring and early warning of the turn-to-turn short circuit fault is realized timely in the initial and developing period,with high accuracy.Engineering verification shows that the signal intensity can be increased by 50-100 times with the proposed method compared to traditional method,and proposed method performs good reliability and stability.The method proposed is able to be applied in the engineering application and expected widespread applications in power systems.

关 键 词：干式空芯电抗器 匝间短路 在线监测 磁场探测法 

分 类 号：TM47[电气工程—电器]