High voltage technology is an important subject that combines applied science and experimental technology

and it focuses on physical phenomena

development laws

and industrial applications under the action of high voltage. Its main research contents in modern times include high voltage insulation technology

high voltage test technology

overvoltage and insulation coordination technology

etc.

and it plays an important fundamental role in the field of electrical engineering. Over the past 20 years

high voltage technology has made tremendous progress and achieved fruitful results in basic theory and engineering applications. These achievements have not only supported the implementation of the national strategy of west-to-east power transmission

but also promoted the development and utilization of new energy and the construction of new power systems

making important contributions to China's breakthroughs in AC/DC ultra-high voltage (UHV) transmission technology for long-distance and large-capacity power transmission. In this paper

the research results and development status of discharge basic theory research

computational high voltage engineering

high voltage electrical materials

UHV transmission technology

high voltage equipment technology

high voltage measurement and sensor technology over the past 20 years are reviewed

the problems existing in current researches are pointed out

and the future development of high voltage technology is summarized and prospected.