Direct-current power supply fault recording device

Abstract

The invention discloses a direct-current power supply fault recording device which comprises a power supply module, a signal acquisition and preprocessing module, a CPU function module, a storage module, an input / output module, a communication module, an alarm module and an indication module. The signal acquisition and preprocessing module comprises a DSP data acquisition board, a DC voltage acquisition module, a DC current acquisition module, a three-phase AC voltage acquisition module, a three-phase AC current acquisition module, a switching value monitoring module and a GPS time service module. Monitoring and data acquisition and processing are carried out on insulation conditions of the direct current charging module, the storage battery, the voltage stabilizing device and the direct current loop, and fault recording starting conditions are identified and then transmitted to the CPU function module; and the CPU function module performs high-speed operation and processing on the acquired signal data, communicates with each peripheral function module, and sends out storage and alarm instructions as required. The wave recording device has the advantages of being wide in data acquisition frequency, high in acquisition precision, strong in anti-interference capability, capable of storing acquired data for a long time, synchronous in monitoring data, complete in fault information recording, redundant in wave recording data, capable of carrying out trend analysis and data association analysis and the like.

Description

Technical field [0001] The present invention relates to the operation and maintenance of the DC power system of the power station, and the field of diagnostic analysis, and more particularly to a DC power failure recording device. Background technique [0002] The DC power system consists of a battery pack, a charging module, a feed and power supply network, and a monitoring module, and a protective device, automatic device, circuit breaker, etc. in the substation. However, the DC power system of the substation is actually not ideal system, often subject to the quality of DC power equipment (such as switching power supply fault, increased battery internal resistance), external interference (such as communication horses, overvoltage coupling), internal Disturbance (such as insulation monitoring device, voltage regulator action, short circuit or grounding), etc., causes power quality pollution of DC power systems, causing the mishapsed or refusal of electrical equipment, and consti...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a DC power supply failure wave recording device to solve the problem of insufficient data collection frequency in the existing DC power system monitoring device, the collected data cannot be stored for a long time, and the monitoring data is not synchronized. The recording data lacks redundancy, cannot perform trend analysis, lacks data association analysis, etc.

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