开关柜内紫外放电信号分布及光电传感器布置方法研究  

Research on distribution of ultraviolet discharge signal in switchgear and arrangement method of photoelectric sensor

作　　者：任美华 孔王莺 白桦 郑昕雷 李江涛 徐凯宏 REN Meihua;KONG Wangruan;BAI Hua;ZHENG Xinlei;LI Jiangtao;XU Kaihong(Zhejiang Huayun Electric Power Engineering Design Consulting Co.,Ltd.,Hangzhou 310002 Zhejiang,China;School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049 Shaanxi,China)

机构地区：[1]浙江华云电力工程设计咨询有限公司,浙江杭州310002 [2]电力设备电气绝缘国家重点实验室(西安交通大学),陕西西安710049

出　　处：《电力大数据》2021年第9期56-64,共9页Power Systems and Big Data

摘　　要：为解决开关柜内放电光检测技术光电传感器安装位置的问题,本文提出通过有限元仿真技术确定开关柜内局部放电源的位置,进而模拟放电光信号分布确定光电传感器安装位置的方法。首先建立开关柜母排室和电缆室有限元模型,计算开关柜内部电场分布,确定局部放电位置,进一步基于几何光学确定放电光信号分布,最终确定传感器安装位置。本文计算研究表明:母排与电流互感器、接地开关绝缘子接触部位,触头盒内部以及避雷器高压端电场最为集中,容易发生局部放电,局部放电光信号主要分布在300nm-400nm的紫外波段,其空间分布随局放源的位置呈现不同的小范围带状光斑,并基于光斑重叠位置建议传感器安装在靠近接地开关相邻内壁上。在仿真的基础上通过实验测得不同放电位置的光信号脉冲波形,验证的方法的有效性。In order to solve the problem of the installation position of the photoelectric sensor of the discharge light detection technology inside the switchgear cabinet, this paper proposes a method to determine the position of the local discharge source inside the switchgear cabinet through finite element simulation technology, and then simulate the distribution of the discharge light signal to determine the installation position of the photoelectric sensor. Firstly, the finite element model of bus bar room and cable room of switchgear cabinet is established to calculate the electric field distribution inside the switchgear cabinet and determine the location of partial discharge, and further determine the distribution of discharge light signal based on geometric optics and finally determine the sensor installation location. This paper shows that the electric field is most concentrated in the contact parts of busbar and current transformer, grounding switch insulator, inside contact box and high voltage end of arrester, which are prone to partial discharge, and the partial discharge light signal is mainly distributed in the UV band of 300 nm-400 nm, and the spatial distribution of the partial discharge signal is different with the position of the partial discharge source, it is suggested that the sensor should be installed on the adjacent inner wall of the earthing switch based on the spot overlap position. On the basis of simulation, the pulse shape of optical signal at different discharge positions is measured by experiment, and the validity of the method is verified.

关 键 词：开关柜 局部放电 电场强度 光信号 光斑 

分 类 号：TM643[电气工程—电力系统及自动化]