High-voltage electric power equipment weak current detection system and method based on photomultiplier

Abstract

The invention provides a high-voltage electric power equipment weak current detection system based on a photomultiplier. The system comprises an embedded processing module. The input end of the embedded processing module is connected to the data end and the pulse counting end of the signal processing circuit. The input end of the signal processing circuit is connected to a sensor group. The power end of the embedded processing module is connected to a power supply module through a power line. The signal processing circuit comprises a primary signal amplification circuit, a pulse discrimination circuit, a secondary amplifying and filtering circuit, and an A / D conversion module. The primary signal amplification circuit is used as a preamplifier circuit and directly carries out reverse amplification on the negative pulse signal outputted by the photomultiplier, the amplification is adjustable, and thus a positive pulse is obtained. An obtained waveform value is adjusted and remains positive, a whole waveform is sampled, the method has the common advantages of an ultraviolet measurement method, and compared with an ultraviolet corona imager, the system has the advantages of low cost, a simple structure, and high practicability.

Description

technical field [0001] The invention relates to the field of weak current detection, in particular to a system and method for weak current detection of high-voltage power equipment based on a photomultiplier tube. Background technique [0002] With the continuous growth of the national economy and the development of industrial and agricultural production, the scale of the power grid has expanded rapidly. At present, my country's installed capacity and annual power generation are among the top in the world. The security of the power grid is related to all aspects of production and life, and its importance has become increasingly prominent. [0003] Due to the increasing demand for electricity and the increase in the voltage level of the power system, the electrical pressure on the insulating materials used in power equipment is increasing day by day. The insulation problem of electrical equipment is becoming more and more prominent. The service life of equipment often depends...

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Problems solved by technology

[0003] Due to the increasing demand for electricity and the increase in the voltage level of the power system, the electrical pressure on the insulating materials used in power equipment is increasing day by day. The insulation problem of electrical equipment is becoming more and more prominent. The service life of equipment often depends on the insulation of insulating materials. Intensity, due to the influence of operation, service life, frequency of use, and use environment, electric equipment will crack year by year, and then malfunction or accident will occur. Once a breakdown occurs, it will cause a partial or even regional power outage, which will affect other sectors of the national economy. Serious adverse consequences caused by production and operation

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