Dedicated anti-resonant fast clearing device for switch cabinet voltage transformer

Abstract

The invention provides a dedicated anti-resonant fast clearing device for a switch cabinet voltage transformer. The dedicated anti-resonant fast clearing device comprises a box body, a control unit isarranged in the box body, the control unit is connected with a device power switch, a system voltage detection unit, a travel switch and a contactor; the contactor is connected with an electric motor; the electric motor is connected with a transmission mechanism; the transmission mechanism is connected with a voltage transformer trolley; the voltage transformer is arranged on the voltage transformer trolley, and the voltage transformer is connected with the system voltage detection unit. The fast clearing device provided by the invention is safe and reliable, sensitive in action, incapable ofdamaging the voltage transformer trolley structure and capable of effectively guaranteeing that the voltage transformer is fast cleared when the system is resonant, thereby avoiding the current transformer burning accident; and meanwhile, the electric motor is used for driving the voltage transformer trolley, and can be applied in daily power on / off operation, the manual operation can be effectively reduced, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the field of voltage transformer detection, and in particular relates to a special anti-resonance fast cutting device for a switch cabinet voltage transformer. Background technique [0002] With the rapid development of social economy, the length and capacity of the company's power distribution lines have been increasing in recent years, and the continuous improvement of customer power supply reliability requirements has put forward higher requirements for the safe operation of equipment. The voltage transformer is one of the main equipment in the 10kV and 35kV systems. Its main function is to detect and measure the system voltage, which is crucial to the safe and stable operation of the system equipment. With the continuous upgrading and optimization of power grid equipment, the current 10kV and 35kV systems are mostly switchgear equipment, and the voltage transformer is installed in a separate voltage transformer cabinet, con...

AI Technical Summary

Problems solved by technology

The height of 10kV and 35kV lines is low, and the insulation level is uneven. In the case of rainy weather or hanging foreign objects, line grounding may occur, causing changes in system parameters. Under certain parameters, it will cause system resonance, and the direct consequence of resonance will cause voltage mutual inductance The voltage of the voltage transformer rises. Since the voltage transformer does not have a device for quick removal, it will cause insulation breakdown of the voltage transformer under long-term operation, causing a burnout accident of the voltage transformer. Since the switchgears are all arranged side by side. The continuous burning of the transformer will ignite other equipment in the switch cabinet, and even cause the multi-faceted switch cabinet to be burned, causing a bus power failure accident, seriously affecting the normal power consumption of customers, and causing serious economic losses to the company

At the same time, with the continuous increase of the line length, the cases of system resonance caused by line grounding and the burning of voltage transformers are increasing year by year

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