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.