适用于快速开关型输配电装置的新型机械特性测试仪

A novel mechanical characteristics tester for rapid switching power distribution devices

快速真空开关具有分合闸时间短、分散性低等优势,在电力系统及快速开关型输配电装置中已获得应用。传统高压开关设备机械特性测试装置的采样率大多为0.1 ms,使其测量精度停留在1/10 ms,难以满足快速真空开关机械特性分散性精准测试的要求,同时也在进行快速开关型输配电装置开关特性的测试时,须摘除开关断口的一次接线,给现场作业带来极大不便,因此有必要开展新型快速真空开关机械特性现场测试技术及应用研究。本文设计了一种以高频交流信号作为信号源的新型机械特性测试仪,可在不拆除电抗器等部件的基础上实现快速真空开关机械特性的检测,极大地提升了检测效率,并与传统机械特性测试仪测量结果进行了试验对比。试验结果表明,新型测试仪的测量结果较之传统测试仪精度更高,采样率可精确至0.01 ms;以高频交流源作为信号源测试结果与分散性均与直流源相近,可直接在有电抗器的回路中进行检测。

Rapid vacuum switches offer advantages such as short opening and closing times and low dispersion,making them suitable for power systems and rapid-switching power distribution devices.Traditional mechanical characteristic testing devices for high-voltage switchgear typically have a sampling rate of 0.1 ms,which limits their measurement accuracy and fails to meet the demands for precise testing of the mechanical characteristics of rapid vacuum switches.Moreover,when testing the switching characteristics of rapid switching power distribution devices,it is often necessary to remove the primary connections at the switch interface,causing significant inconvenience for field operations.Therefore,it is essential to develop new technologies and applications for on-site testing of the mechanical characteristics of rapid vacuum switches.This paper presents a novel mechanical characteristic tester that utilizes high frequency alternating current signals as a source,enabling the detection of mechanical characteristics of rapid vacuum switches without the need to dismantle components like reactors.This significantly enhances testing efficiency and provides experimental comparisons with traditional mechanical characteristic testers.Test results indicate that the novel tester achieves higher measurement accuracy than traditional testers,with a sampling rate precise to 0.01 ms.Testing results using a high-frequency AC source are comparable to those obtained with a DC source,allowing for direct detection in circuits with reactors.