Method and device for repairing ground insulation of dry-type iron core reactor

Abstract

The invention discloses a ground insulation repairing method and a device for a dry iron core reactor. The method specifically comprises the following steps: (1) placing a dehumidifier on the periphery of a to-be-repaired dry iron core reactor; (2) covering the to-be-repaired dry iron core reactor and the dehumidifier into a sealed cover body; (3) respectively connecting an iron core ground lug and a metal base of the to-be-repaired dry iron core reactor by virtue of insulated cable leads, and leading out of the sealed cover body to be connected with an insulating-resistance meter; (4) starting the dehumidifier to dehumidify, and pumping moisture adsorbed on the to-be-repaired dry iron core reactor out of the sealed cover body; (5) monitoring a ground insulating resistance value of the to-be-repaired dry iron core reactor by virtue of the insulating-resistance meter, stopping dehumidifying until the ground insulating resistance value is greater than or equal to the set value, and finishing repairing. According to the ground insulation repairing method and device, the energy consumption can be greatly reduced; the ground insulation repairing device and device are short in dehumidifying time, high in efficiency, safe and reliable in dehumidifying process, and free of tracking by operating personnel; the repairing cycle is greatly shortened; manpower is saved; and the method and the device have good application prospects.

Description

technical field [0001] The invention relates to a method for repairing the ground insulation of a dry-type iron core reactor, and also relates to a device using the method. Background technique [0002] Dry-type iron core reactor has the advantages of small partial discharge, high mechanical strength, small size, flame retardancy, less maintenance, small magnetic flux leakage, and is suitable for indoor installation. It is widely used in power transmission and transformation systems, electric railways, metallurgy and other fields, especially It is suitable for places such as urban network substations and underground substations with limited installation space and special fire protection requirements, and can give full play to its advantages of small size and flame retardancy. Before the dry-type iron-core reactor undergoes withstand voltage test acceptance or is put into operation, due to the relatively humid indoor environment or underground space, the insulation resistance...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: (1) Special equipment such as hoisting and transfer, heating furnace, etc. are required, and the entire reactor needs to be heated. The heating is not selective and consumes more energy; (2) The process of transferring the reactor is long, and the heating curve includes several constant temperatures. The maintenance period, the accumulated time is twelve hours or more, resulting in a long repair cycle

This method has the following disadvantages: (1) Each reactor needs to use 6 to 10 heaters or high-power heating lamps with a power of about 1000W, and the total heating power is high; The directional heat conversion efficiency of the heater or high-power heating lamp to the reactor is low, and the reactor heats up slowly, and the effect is poor; (3) The heating process requires careful tracking by personnel, and safety measures are taken to prevent fires, resulting in more manpower consumption

Images