基于离子计数法的直流线路空间电荷密度测量

发布时间：2018-06-01 03:44

本文选题：特高压直流输电线路 + 悬浮颗粒物　；参考：《电网技术》2017年02期

【摘要】：当特高压直流输电线路途经地区的空中悬浮颗粒物较多且空气干燥时,空间电荷分布的变化导致地面合成电场异常增大。为对该问题进行研究,测量空间电荷分布是一种直接且有效的手段。通过分析基于离子计数法的空间电荷密度测量原理和装置电流检测部分的等效电路模型,提出了装置的设计要求,对基于该原理的电荷密度测量装置进行了设计,并采用间接校准方法对装置进行了标定。采用该装置对直流输电试验线段下的空间电荷密度进行了实测,测量结果表明电荷密度的横向分布规律、随导线加压的变化情况与合成电场、离子流密度类似。装置可以实现输电线路周围空间电荷密度的测量。
[Abstract]:When there are more suspended particles in the air and the air is dry, the change of space charge distribution results in the abnormal increase of the ground synthetic electric field. In order to study the problem, measuring space charge distribution is a direct and effective method. By analyzing the principle of space charge density measurement based on ion counting method and the equivalent circuit model of the current detection part of the device, the design requirements of the device are put forward, and the charge density measuring device based on this principle is designed. The device is calibrated by indirect calibration method. The measurement results show that the transverse distribution of the charge density is similar to that of the composite electric field with the change of the conductor pressure and the ion current density is similar to that of the composite electric field. The device can measure the space charge density around the transmission line.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;中国电力科学研究院;
【基金】：国家电网公司科技项目(GYB17201400178) 国家自然科学基金项目(61273165)~~
【分类号】：TM75

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