开关柜电弧故障及其测量方法研究

发布时间：2018-09-04 19:56

【摘要】：开关柜在电力系统有大量的应用,对其电弧故障的快速检测及切除是一项非常重要的工作。目前对开关柜故障的研究大都集中在对其局部放电的检测方面,而忽略对电弧故障的产生、发展以及各类检测方法的研究。提出母线等导体连点处的接触点接触不良是造成电弧故障产生的重要原因,在此基础上,分析了因接触点接触不良导致接触电阻变大,并在负荷电流变化时产生热应力的作用下形成恶性循环、最终发展成电弧故障的过程。然后,综述了多种常用的电弧故障检测方法,包括电磁发射、声音发射、光发射、化学发射以及热发射等检测方法。最后,通过搭建开关柜故障电弧测量平台,采用特高频传感器、超声传感器、RF天线、高频CT、微分电场传感器和紫外传感器等多种传感器实现对电弧故障的测量,并给出了试验结果。
[Abstract]:Switchgear has a large number of applications in power system. It is very important to detect and remove the arc fault quickly. At present, most of the researches on switchgear faults are focused on the detection of partial discharge (PD) of switchgear, but the generation and development of arc faults and the research of various detection methods are neglected. It is pointed out that poor contact point at the connecting points of conductors such as busbar is an important cause of arc fault. On this basis, the contact resistance is increased due to poor contact point contact. Under the action of thermal stress when the load current changes, a vicious circle is formed, which eventually develops into the process of arc fault. Then, several common arc fault detection methods, including electromagnetic emission, sound emission, optical emission, chemical emission and thermal emission, are reviewed. Finally, the arc fault measurement platform of switchgear is built, and various sensors such as UHF sensor, ultrasonic sensor RF antenna, high frequency CT, differential electric field sensor and ultraviolet sensor are used to measure the arc fault. The experimental results are given.
【作者单位】：云南电网有限责任公司电力科学研究院;云南电力试验研究院(集团)有限公司;防灾科技学院;
【基金】：国家自然科学基金项目(61573046)~~
【分类号】：TM591

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