Technical requirements for substation equipment

Abstract

In recognition of a renewed interest in transmission voltages exceeding those in common usage today, SC A3 established WG A3.22 Technical Requirements for Substation Equipment exceeding 800 kV. The WG was tasked with reviewing the worldwide state-of-theart technical specifications for substation equipment rated at 800 kV, establishing the technical background for these specifications and making recommendations for the future standardization of Ultra High Voltage (UHV) substation equipment. A total of 39 international experts from 17 countries participated in these investigations and have produced a comprehensive survey of the state-of-the-art as presented in TB No. 362. The TB gives an overview of the characteristics of todays highest voltage systems in common use (735 to 800 kV) and of the various UHV projects around the world. Technical phenomena and technical specifications are compared and conclusions drawn regarding those areas which are well defined and those where further, more detailed, investigation is required before effective standardization can be achieved.