Controlling switchgear with protection against faulty switching in switch panels - assigning operating unit to each switchgear item in switching system of electrical power distribution system to identify its condition

摘要

Control units (0.1 - 0.4) are provided and, if a command is received for controlling, e.g. a circuit breaker or an isolator, a test is undertaken to determine whether it is permitted, based on the switchgear, the panel and the system-related interlocking conditions. The switchgear condition identified in an operating unit (1.15-5.21) is made known using the data transmission network of all the other operating units (1.15-5.21). If a command for the control of the associated switchgear is supplied to an operating unit, the interlocking conditions are tested and the command is rejected if this is not permitted. When the command is identified as reliable, the operating unit assumes an active condition. Based on the data received, a test is carried out to determine whether at least a second operating unit is active. Also if command is permitted on the basis of stored double operation conditions. In the event of a conflict, stored data determines which switch command has priority. ADVANTAGE - All operating conditions of switching system can be processed totally for control and interlocking, taking account of coming evaluations and change-over of data, without central component for several switchgear items being actively concerned.