电力断路器的真空度在线检测系统设计  

Design of on⁃line Vacuum Degree Detection System for Power Circuit Breaker

作　　者：李宇[1] 王忠利[1] LI Yu;WANG Zhong-li(School of Electrical Engineering,Zhengzhou University of Science and Technology,Zhengzhou 450064,China)

机构地区：[1]郑州科技学院电气工程学院,河南郑州450064

出　　处：《仪表技术与传感器》2020年第11期91-94,100,共5页Instrument Technique and Sensor

基　　金：2019年度河南省高等学校重点科研项目(20B120003)。

摘　　要：真空度是电力断路器的重要参数,关系到其性能和电网运行安全,为了解决电力断路器真空度在线检测的问题。文中利用脉冲电磁波检测原理开发了在线检测系统,硬件部分设计了基于MAX1644芯片的电源电路、最高100 MHz的脉冲电磁波检测电路和采用两级运算放大器的浮地式设计的信号调理电路;软件部分设计了真空度在线采集程序和将电压转化为真空度的标定程序。为了验证系统性能,搭建了电力断路器试验验证系统,通过真空阀将标准真空室与断路器真空室连接在一起,设定不同压强后读取检测结果,结果表明:辐射电压和真空度符合且精度可以达到10-5 Pa,满足设计需求。Vacuum degree is an important parameter of power circuit breaker,which is related to its performance and power grid operation safety.In order to solve the problem of power circuit breaker vacuum degree on⁃line detection,the on⁃line detection system was developed based on the principle of pulse electromagnetic wave detection.In the hardware part,the power circuit based on MAX1644 chip,the pulse electromagnetic wave detection circuit with the maximum 100 MHz and the signal conditioning cir⁃cuit with two⁃stage operational amplifier were designed.In the software part,the on⁃line collection program of vacuum degree and the calibration program of converting voltage into vacuum degree were designed.In order to verify the performance of the system,the power circuit breaker test verification system was built.The standard vacuum chamber and the circuit breaker vacuum chamber were connected by the vacuum valve,and the test results were read after setting different pressure.The results show that the radia⁃tion voltage and vacuum degree meet the requirements of the design and the accuracy can reach 10-5 Pa.

关 键 词：电力断路器 真空度 在线检测 脉冲电磁波 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]