There is an intricate electromagnetic environment because of the rapid development of modern electrical industry, especially the existence of HV or EHV substation and the application of electrical and electronic equipment.
The effect of deregulated power market on the function,reliability and economy of HV,EHV substation autom ation is described. It is pointed out that the trend for HV,EHV substation automation is the integrated automation system in the near future along with the developm ent of computer,comm unication and network technologies.
Based upon the practice of substation automation for super high voltage substations, the main content and the functions of the substation automation are discussed, some concrete problems in the implementation of super high voltage substation automation are explained.
The new technical development trends related to the system architecture,bus structure,system security and communication modes and the development strategies of super high voltage substation automation systems are discussed.
Introduces and compares two types of inner communication schemes between Lon works field bus net and flush type Ethernet, which separately applied to integrated automation system in high, intermediate and low voltage substation and super high voltage substation, finally discusses the general concerning problems of using flush type Ethernet for substation integrated automation system.
This paper analyzes two kinds of network structures and their characteristics of the ultra high voltage substation automation systems in China, and proposes the design idea of a management subsystem of protective relay fault information based on substation automation system. The key technology is that microcomputer protection equipment should use the unified and standard communication protocol, and unified clock timing.
In combination with the comprehensive automation system of 500 kV Gulu Substation,the structure,working principle,and functions of the comprehensive automation system for UHV substations are presented,as well as experience in installation and debugging of substation automation systems.