Fuse state monitoring protection device and protection method

Abstract

The invention relates to a fuse state monitoring protection device and a fuse state monitoring protection method, which are used for improving the protection and trouble shooting of a capacitor group in a high voltage reactive power compensation device and solve the problems that a conventional fuse does not have a state monitoring function and that specific failing points are difficult to find after the fuse fails. The fuse state monitoring protection device comprises the fuse connected with capacitors and a controller connected with the fuse, wherein the two ends of the fuse are connected with a voltage sensor respectively; the voltage sensors are connected with the controller; and each capacitor is connected with an alarm which is connected with the controller. Voltage at the two ends of the fuse is monitored, the controller performs comparison and judgment to determine the working state of the fuse, simultaneously the abnormally working fuse is accurately positioned, corresponding capacitors are protected, failing positions are convenient to investigated, response is made timely, convenience is brought to the maintenance of maintainers, and shutdown time is shortened.

Description

Technical field [0001] The invention belongs to circuit detection and protection, in particular to a fuse state monitoring protection device and a protection method used in high-voltage reactive power compensation devices to improve the protection and troubleshooting of capacitor banks. Background technique [0002] Because there are a large number of inductive loads in the power grid, such as motors and transformers, they are all inductive loads. These inductive loads severely reduce the power factor of the power grid during operation, increase power loss, and cause voltage fluctuations, which affect the safe operation of the system. The use of capacitor compensation devices is a commonly used method to improve power factor, reduce line loss, and improve power quality. At present, the protection of capacitors mainly adopts open delta protection, current unbalance protection, differential voltage protection, differential current protection, etc. These protections are aimed at the...

AI Technical Summary

Problems solved by technology

[0004] The invention solves the disadvantage that the existing fuse does not have a state monitoring function, and it is not easy to find the specific fault point after the fuse fails, which brings difficulties to the investigation of the accident. It provides a fuse connected with the fuse that can monitor the working state of the fuse. Fuse state monitoring and protection device and protection method

[0005] The present invention also solves the disadvantage that the monitoring in the prior art is connected between the power supply and the load, and it is impossible to distinguish whether it is a fault of the fuse or a fault of the line after a fault occurs. Fuse state monitoring protection device and protection method for fuse working state

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