强电磁环境下基于无线传输的直流电压互感器校验方法误差研究

在直流电压互感器校验中，为解决直流互感器一次分压器和二次测量系统通信距离长的问题，本文基于无线通信与北斗同步技术，提出了一种直流电压互感器无线校验方法和硬件设计方案，在锦屏-苏州±800 kV直流换流站开展了直流电压互感器现场误差无线校验试验.试验结果显示，装置在测量低压时无线校验试验数据偏差小，但在测量高压时，由于处于高电压强电磁的环境，GPS定位与同步存在不稳定与小范围偏差的问题.针对此问题，本文对直流电压互感器无线校验系统在复杂电磁环境干扰下进行特性分析，并提出减小无线传输的直流电压互感器误差的解决方法，对直流电压互感器的无线校验技术发展有一定的工程意义.

Error analysis of DC voltage transformer calibration method based on wireless transmission in strong electromagnetic environment

In this article,we propose a wireless DC voltage transformer calibration method and related hardware design for Jinping-Suzhou±800 kV DC converter station to conduct error validation test on DC voltage transformer.The proposed method is based on wireless communication and Beidou synchronous technology to solve the issue of long distance between the DC transformer voltage divider and the secondary communication measuring system.The test results show that a minor deviation is observed in wireless calibration test on measurement of low voltage.While on measurement of high voltage,the GPS positioning and synchronization are affected owing to the high voltage and strong electromagnetic environment,which produce instability and minor deviation of the calibration.To resolve this problem,the characteristics of wireless calibration system of DC voltage transformers are analyzed under interference of complex electromagnetic environment,and a solution is proposed to reduce the error generated in DC voltage transformers using wireless transmission approach.This will avail the development of wireless calibration technology for DC voltage transformers.