Fuse state on-line monitoring device

Abstract

The invention discloses a fuse state on-line monitoring device. The fuse state on-line monitoring device is composed of a voltage sensor for collecting voltages at the two ends of a fuse, a calculation module connected with the voltage sensor through a conversion module, and an output module connected with the calculation module. The voltage sensor collects possible overvoltage under the conditions of normal conduction voltage drop and short circuit of the fuse, the conversion module processes and converts an original signal output by the voltage sensor into a digital quantity or an analog quantity and outputs the digital quantity or the analog quantity to the calculation module, and the calculation module extracts characteristic information of a voltage signal and through an analysis and identification algorithm, judges whether the fuse is normal or damaged or fused or not, the output module outputs the normal or damaged or fused state of the fuse in an IO quantity or communication mode, and a voltage collection value can also be output if necessary. Whether the fuse is damaged and fused or not is judged by measuring the voltage at the two ends of the fuse and a characteristic recognition algorithm, a traditional fuse contact switch can be replaced, the production process of the fuse is simplified, and the finished product rate of the fuse is increased.

Description

Technical field[0001]The present invention belongs to the field of power technology, and the protection of DC systems, and is specifically a fuse state online monitoring device.Background technique[0002]With the development of the ship's integrated electricity, various forms of power supply and load will access the ship power grid, the power electronic device is widely used, and the DC power distribution system is simple in its network, the interface is convenient, the stability is high, and the load is high. The rapid response is widely used in the ship's integrated power system.[0003]Compared with the AC power system, the protection in the DC system mainly rely on the fuse implementation, using the fuse to quickly cut off the loop of the short-circuit fault current, limit the impact of the fault.[0004]However, the fuse belongs to a disposable protective element. When a short-circuit fault occurs, the fuse in the short-circuit current loop will flow through a large short-circuit cu...

AI Technical Summary

Problems solved by technology

[0004] However, the fuse is a one-time protection element. When a short-circuit fault occurs, the fuse in the short-circuit current loop will flow a large short-circuit current. According to the size and duration of the current, the fuse will eventually appear normal, partially damaged and Three states of fusing

The fusing state is easy to judge, and some damaged fuses are not easy to identify, but some damaged fuses have hidden dangers whether they are in normal flow or short-circuit current, and they need to be replaced

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