基于阻抗匹配的单线自补偿式电弧故障检测方法

打开文本图片集

DOI：10.15938/j. emc.2025.05.011

中图分类号：TM501.2 文献标志码：A 文章编号：1007-449X（2025）05-0108-15

Self-compensating arc fault detection method based on impedance matching for a single-wire

WU Rongjun1，2，3， ZHENG Xin1，2，3

（1. College of Electrical Engineering and Automation，Fuzhou University，Fuzhou 35O116，China; 2.Fujian Key Laboratory of New Energy Generation and Power Conversion，Fuzhou 35O116，China; .Engineering Research Centerof SmartDistributionGrid Equipment，Fujian Province University，Fuzhou 350l16，China）

Abstract：The number of electrical safety accidents is increasing year by year due to the aging or misconfiguration of electrical wiring，and AC arc faults arean important causative factor of electrical fires. Considering the complex factors such as the nature of AC current，load type，etc.，a single-wire self-compensating arc fault detection method based on impedance matching was proposed to realize the universal detection offaulty arcs. The influencing factors of currnt coupling signals in electrical lines were analyzed in detail，and the line curent coupling flux was simulated and analyzed to verify the anti-interference of the coupling signals.Matching inductance on the vice side of the transformer and the line equivalent circuit were used to achieve paralel resonance，so that the transformer can be in a specific high-frequency band signals passing through the larger electrical signals induced by the theoretical calculations to determine the applicabilityof the method，and the arrangement of the resonant test platform for verification.The prototype was designed to be tested and verified in the arc fault experimental platform，and the results show that the scheme can effectively extract the arc fault characteristics，distinguish the load start high-frequency harmonics from the fault high-frequency harmonics，and realize the real-time and accurate judgment of all types of arc faults specified in GB 14287.4—2014.

Keywords： arc fault ； universal testing； high-frequency resonance；self-compensation； impedance matc-hing

0引言

根据中国国家消防局统计，2022年全年接报自建住宅火灾17万起，死亡人数804人，分别占火灾总数的 20.6% 和 39.1% ，而电气线路引起的火灾占总数的 42.8% [1]。（剩余16129字）