1000kV特高压交流电压互感器研制现状及性能浅析

Development and Performance Analysis of 1 000 kV UHV Voltage Transformer

1000kV电压互感器是实现特高压电网电能计量及电网保护的关键设备,中国特高压工程所采用的1000kV电压互感器均为自主研制,如用于敞开式变电站的柱式电容式电压互感器,用于GIS站的罐式电容式电压互感器、罐式电磁式电压互感器和电子式电压互感器等。为提高特高压电压互感器技术水平,总结研究经验,笔者介绍了适用于特高压敞开式变电站和特高压全封闭气体绝缘变电站(GIS)的1000kV电压互感器类型及原理,描述了中国特高压工程中1000kV电压互感器样机研制进展,详细论述了不同类型1000kV电压互感器的绝缘性能和误差性能,为中国特高压工程1000kV电压互感器选型应用提供指导。

In Chinese UHV projects,such key equipments as 1 000 kV transformer,1 000 kV lightning arrester,1 000 kV instrument transformer are all developed independently.1 000 kV voltage transformers are used for metering electric energy of UHV power line.There are four kinds of voltage transformer for UHV,i.e.1 000 kV column-type capacitor voltage transformer,1 000 kV tank-type capacitor voltage transformer,1 000 kV tank-type inductive voltage transformer,and 1 000 kV electronic voltage transformer.The first one is suitable for air insulated substation;the others are suitable for gas insulated switchgear.In this paper,the applications of the 1 000 kV voltage transformers both at home and abroad are introduced,their types and principles are described,the main parameters of different types of 1 000 kV voltage transformers are analyzed,and the development of the 1 000 kV voltage transformers used for UHV projects in China are discussed.Moreover,the important performances of different kinds of 1 000 kV voltage transformers are analyzed with emphasis on comparisons of the insulation performances and error characteristics of different tank-type voltage transformers.This study may provide a guide for structure selection of 1 000 kV voltage transformers in Chinese UHV projects.