A capacitor cabinet online monitoring automatic protection device and its working method

Abstract

The invention discloses an automatic protection device for online monitoring of capacitor cabinet and its working method. The device comprises a capacitor cabinet and a monitoring host, a protection module, a current sensor, a smoke sensor, a temperature sensor and a heat radiating fan arranged in the capacitor cabinet. The output end of the monitoring host is electrically connected with the input end of the heat radiating fan; and the input end of the monitoring host is electrically connected with the output ends of the smoke sensor and the temperature sensor respectively; the monitoring host and the protection module are electrically connected bi-directionally; the input end of the protection module is electrically connected with the output end of the current sensor. The automatic protection device for online monitoring of capacitor cabinet also includes a number of fire extinguishers; the output end of the monitoring host is electrically connected to the input ends of the fire extinguishers; the monitoring host is provided with a GPRS module and / or a RS385 communication module. The device and the method of the invention have the advantages of realizing real-time display and protection of the capacitance value of each group of capacitors in the capacitor cabinet and automatically extinguishing the fires caused in the extreme situation such as capacitor explosion and oil leakage instantly.

Description

technical field [0001] The invention relates to the field of capacitor cabinet detection equipment, in particular to an automatic protection device for on-line monitoring of capacitor cabinets and a working method thereof. Background technique [0002] Now the capacitor cabinet controller monitors the reactive power demand in the power grid through CT, and then automatically controls the switching on and off of each compensation circuit according to the settings of the controller parameters. So that the power factor in the grid can reach the expected target. Capacitors are the only wearing parts in the entire power distribution equipment, and there are many switching circuits in the capacitor cabinet. To what extent and whether it needs to be replaced; if there is no such monitoring system, operation and maintenance personnel need to open the cabinet to measure one by one, which is very laborious. If the capacitor is not fully discharged, there will also be a safety proble...

AI Technical Summary

Problems solved by technology

Since the power distribution cabinet is an important device to ensure power supply, fire can lead to unpredictable sudden power outages and major property losses

Images