特、超高压交、直流并行输电线路周围混合电场的测量方法

由于交、直流并行输电线路周围电场既有直流分量,又有交流分量,为混合电场,传统的仪器无法直接开展测量工作。为此,在分析现有直流线路地面电场测量装置(旋转伏特计)、地面离子流密度测量装置(离子流板)测量原理的基础上,研究了交、直流混合电场下已有测量设备输出结果的频谱特征,建立了交流和直流电场与测量结果频谱的对应关系,从而提出了交直流并行输电线路下同时考虑直流和交流分量的地面电场和离子流密度测量方法。在缩尺模型下的实际测量和分析表明,所提出的交、直流混合电场下地面电场和离子流密度的直流和交流分量测量方法是有效的。

Mehtod for Measuring the Electric Field Under UHV/EHV DC/AC Hybrid Transmission Lines

Because the the electric field around the AC and DC parallel transmission lines is a mixed field,which has both DC component and AC component,the traditional instruments can not be directly used to measure the field.Consequently,by the measurement principles of the DC electric field measuring device(rotating voltmeter) and the ion current density measuring devices(ion current board),we investigated the spectrum characteristics of the devices’ output in the mixed electric field.Moreover we founded the relationship between the AC/DC electric field and the measuring devices’ spectra,and presented the measurement methods for the electric field and the ion current density.The measurement and analysis on a reduced-scale model show that the measurement methods are effective.