Defect of automatic bus transfer equipment and its solution;

A new kind of automatic bus transfer equipment is put forward, in which the programming of the operation logic is realized by the man machine interface and the mode of the operation logic equation is constructed by the operation element.

Study and application on the operation program of the backup power switchover unit in the substations styling in line-transformer-connection;

A summarization on design and application of backup power switchover unit;

According to the operating logics of 110 kV automatic stand-by power switching devices,this paper analyzes the problems as to the introduction of the breaker condition contact and the cooperation with the security and stability system.

Measures of using automatic stand-by power switching devices and auto-reclosing devices with protection values reasonably set are proposed to solve th.

By making use of automatic back-up power supply device with error - locking - proof function, the quality and reliability of power supply are in-creasedgreatly.

Practice and thought of automatic bus transfer in power network;

According to the basic principle of automatic bus transfer,a new scheme is presented,which is designed for the typical and standard inter-bridge connection of substations and is reliable and adaptive.