Start-up protection method and device for commissioning of electric equipment

Abstract

The invention discloses a start-up protection method and a start-up protection device for commissioning of electric equipment. A start-up protection device 2n for the current setting, delay and execution of the electric equipment is adopted; an A phase current relay, a B phase current relay, a C phase current relay and a D phase zero sequence current relay which are adopted by setting currents are used for setting the currents of the electric equipment; logic current values for commissioning is set to be more than or equal to 1; current signals of which the set logic current values are more than or equal to 1 are delayed; the delayed current signals are transmitted to a trip executing device; the trip executing device makes platens of a first group of trip outlets LP1 and a second group of trip outlets LP2 of a protection screen control loop of the electric equipment simultaneously input by using an execution relay so as to protect the protection screen control loop. The start-up protection method and the start-up protection device can realize an adaptive input supply power, visually and conveniently set the currents, avoid error setting of constant values caused by human factors, have fast inspection time and high working efficiency, are easy to operate and reduce the labor intensity of workers.

Description

technical field [0001] The invention relates to the technical field of relay protection for power grids, and is especially suitable for the trial operation of high-voltage transmission lines, transformers, etc., which need to temporarily increase charging protection or add a delay trip function to the charging protection. A start-up protection for electrical equipment trial operation Methods and devices. Background technique [0002] With the expansion of the grid network structure and the increasing number of substations, the frequency of installing temporary charging protection devices in the trial operation of new equipment is also increasing. At present, the traditional charging protection device temporarily added during the trial operation of transmission lines or transformers is formed by connecting multiple independent relays through test wires according to a certain wiring method. Its wiring is complicated, and there are certain potential safety hazards. At the sam...

AI Technical Summary

Problems solved by technology

Usually, it takes about 10 minutes to set and verify a relay. This inspection process takes a long time and affects work efficiency.

[0003] In summary, due to the use of the above multiple relay connections, the labor intensity increases and the work efficiency is low

Especially when the wiring is wrong, it is easy to cause accidents

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