多电压等级非接触式验电器设计

Design on non-contact electroscope with multiple voltage levels

为解决传统验电器检测电压等级单一、绝缘性要求高、验电盲区等问题,基于平板电容传感器电荷感应原理设计出一款多电压等级非接触式验电器。分析传感器测量原理并完成结构改进;对不同电压等级、不同回路数、不同排列方式输电线路建模仿真,得到传感器的感应电压;分析同杆架设和线路缺相情况下传感器的抗干扰性,进而确定各电压等级报警阈值范围;完成软硬件功能及APP验电监测平台设计,可实现电路自检、电压等级选择、数据采集与处理、声光报警、蓝牙无线数据传输等功能;最后在高压条件下进行线性度和功能测试试验,试验结果表明,该传感器感应电压与电场强度线性相关系数大于0.99,线性度良好;验电准确率为100%,验电结果稳定可靠。

In order to solve the problems of the traditional electroscope,such as single voltage level,high insulation requirement and blind zone of power inspection,a multi-voltage level non-contact electroscope is designed based on the charge induction principle of the flat capacitor sensor.The measuring principle of the sensor was analyzed and the structure was improved.Through modeling and simulation of transmission lines with different voltage levels,different circuit numbers and different arrangement modes,the induced voltage of the sensor was obtained.And then through analyzing the anti-interference performance of the sensor under the condition of line erection on the same pole and line lack of phase,the alarm threshold range of each voltage level was determined.The software and hardware functions of the electroscope and the design of the APP electrical inspection monitoring platform were completed,which can realize circuit self-check,voltage grade selection,data acquisition and processing,sound and light alarm,Bluetooth wireless transmission and other functions.At last,the linearity test and the performance experiment under high voltage conditions were carried out.The test results show that the linear correlation coefficient between the induced voltage and the electric field intensity of the sensor is greater than 0.99,and the linearity is good.The accuracy rate is 100%,and the results are stable and reliable.