A step-by-step determination method and device for the parallel current of gis double buses

Abstract

The invention discloses a step-by-step determination method and device for the parallel current of double busbars in GIS. Based on the data report obtained by the substation monitoring system and the basic data related to the double busbars in the database, the three-phase current flowing through the busbar theory is calculated, and then Auxiliary to judge whether there is a hidden danger of poor contact between the parallel interval and the loop formed by the bus coupler.

Description

technical field [0001] The invention relates to the technical field of electric power, in particular to a step-by-step determination method and device for the parallel current of GIS double buses. Background technique [0002] Fully enclosed combined electrical appliances GIS are widely used in substations. Since the metal of the GIS equipment is fully enclosed, it is difficult to use direct visual observation and infrared temperature measurement during operation to judge the insertion depth of the connector conductor, the opening and closing of the circuit breaker and the knife switch, and the contact status of each contact surface. During operation, the insertion depth of the joint conductor is insufficient and the contact is poor; the position indication of the circuit breaker and the isolating switch is in place, but the actual moving contact is not in place, and the moving and static contacts are in poor contact or even open circuit. The existence of these defects serio...

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Problems solved by technology

[0004] However, three-phase current transformers are installed in the intervals of the double-bus connection mode to carry out real-time current data monitoring, and in the process of inverting the bus, when there are two parallel points in the double bus, the current of each parallel point There is no uniform basis for judging whether the distribution is normal. It can only be determined by whether the current of the bus coupler interval changes before and after paralleling. This qualitative criterion is too rough and may easily lead to missed judgments.

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