Post-failure live treatment method for protection device of distribution network system and portable protection device

Abstract

The invention relates to a portable protection device for post-failure live treatment of a protection device of a distribution network system and a live treatment method thereof, and the portable protection device comprises a current clamp clamped on the connection line between the secondary side of a current transformer and a terminal block, a sampling module for collecting current on the current lamp, a control module connected with the output end of the sampling module and a tripping relay connected with the output end of the control module, wherein the tripping relay is used for connecting with a switch tripping control loop, when failure occurs in the protection device, the tripping relay is put into the connection with the switch tripping control loop under drive of the control module so as to enable the portable protection device to replace the protection device for being put into operation temporarily. As live working treatment is adopted during one equipment interval corresponding to the failure protection device, the workflow is simplified, the working efficiency is improved and the safe operation level of a power grid is not affected.

Description

technical field [0001] The present invention relates to a charging processing method after a protection device fails in a distribution network system, in particular to using a portable protection device instead of the fault protection device to temporarily realize the basic protection function of the primary operating equipment corresponding to the fault protection device, thereby eliminating the need for specific The primary equipment takes power-off measures to carry out live treatment of the fault protection device. Background technique [0002] The power distribution system, especially for the voltage level system of 35KV and below, usually consists of a substation, a 10kV / 20kV / 35kV output busbar connected to the substation, and multiple primary equipment intervals mounted on the busbar. In order to monitor and protect primary The operation of the equipment interval, each primary equipment interval corresponds to a protection device, and the protection device itself ofte...

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Problems solved by technology

[0005] (1) It is necessary to perform a power outage operation for the primary equipment interval corresponding to the fault protection device, which is time-consuming and laborious, and the work efficiency is low;

[0006] (2). It is necessary to cut off the primary equipment corresponding to the fault protection device. If the power supply area is powered by a single power supply, the power users in the power supply area must face Power failure risk, power supply companies also face liability for breach of contract;

[0007] (3) It is necessary to cut off the power at the primary equipment interval corresponding to the fault protection device. If it is the interval of the tie line of the substation in the grid system, the grid operation mode is weak, and the grid Increased security risk

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