油浸式电流互感器的基本结构与介损试验重点  

The Basic Structure of Oil-immersed Current Transformer and the Key Points of Dielectric Loss Test

作　　者：林忠立 LIN Zhongli(State Grid Fujian Electric Power Co.,Ltd Maintenance Branch Company,Fuzhou Fujian 350000)

机构地区：[1]国网福建省电力有限公司检修分公司,福建福州350000

出　　处：《河南科技》2021年第21期40-44,共5页Henan Science and Technology

摘　　要：在电力系统中,电流互感器将大电流转换为一定比例的小电流,起到测量电流、自动控制和继电保护的作用。作为重要的变电设备之一,电流互感器按照绝缘介质可分为干式、浇注式、油浸式和气体绝缘式。油浸式电流互感器制造成本较低,在35~500 kV等级变电站内使用广泛。随着设备投运年限的增长,油浸式电流互感器故障率也显著提升。电容量及介质损耗试验作为一种检测容性设备绝缘状态的试验方法,针对不同结构的油浸式电流互感器也有不同的试验要点。本文对油浸式电流互感器的基本结构进行阐述,并针对性提出介损试验重点。In the power system,a current transformer converts a large current into a certain proportion of a small cur⁃rent,which plays a role in current measurement,automatic control and relay protection.As one of the important sub⁃station equipment,current transformers can be divided into dry type,pouring type,oil-immersed type and gas-insu⁃lated type according to the insulating medium.Oil-immersed current transformers have low manufacturing costs and are widely used in 35~500 kV substations.With the increase in the operating life of the equipment,the failure rate of oil-immersed current transformers has also increased significantly.The capacitance and dielectric loss test is a test method for detecting the insulation state of capacitive equipment.There are also different test points for oil-im⁃mersed current transformers of different structures.This article describes the basic structure of the oil-immersed cur-rent transformer,and puts forward the key points of the dielectric loss test.

关 键 词：介损试验 油浸式电流互感器 正立式电流互感器 倒立式电流互感器 

分 类 号：TM452.94[电气工程—电器]