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DC system insulating monitor apparatus with remote alarm and inquiry function

A technology of insulation monitoring device and query function, which is applied in the field of DC system insulation monitoring device, can solve the problem of inability to know DC system faults, etc., and achieves the effect of satisfying unmanned duty, good effect and simple structure

Inactive Publication Date: 2004-01-28
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The DC system insulation monitoring device composed of the above principles can monitor the insulation drop and give the fault branch, but the operating personnel in unattended substations cannot know the fault of the DC system

Method used

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  • DC system insulating monitor apparatus with remote alarm and inquiry function
  • DC system insulating monitor apparatus with remote alarm and inquiry function

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Embodiment Construction

[0008] The present invention takes industrial computer, leakage current detection sensor, voltage sensor, analog quantity sampling template, electronic switch to form DC system insulation monitoring device as the base body, connects SHT-8A / PCI voice card on the internal bus of industrial computer, so that the device has Remote alarm and query function.

[0009] 1 Realization of DC system insulation monitoring (greater improvement than existing technology)

[0010] This device uses the method of measuring the DC leakage current to monitor the insulation of the DC system, and its principle is shown in Figure 1. The device closes the electronic switches S1 and S2 every 5 minutes and puts in the detection resistor that does not affect the operation of the DC system. In order to avoid sampling data errors caused by accidental reasons, after switching the electronic switch each time, it will continuously sample 20 times and obtain the sampling voltage. The average value, using the ...

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Abstract

The equipment comprises the industry control computer, the sensor for detecting leakage current, the voltage sensor, the analog sampling module, the electronic switch and the voice card connected to the internal bus. The invention possesses features of simple structure, easy of operation, functions of remote alarming, remote querying and satisfying need of unattended on duty in transformer station. Actual examining the equipment shows good result.

Description

Technical field: [0001] The invention relates to a DC system insulation monitoring device with remote alarm and query functions, belonging to the technical field of DC system online monitoring and fault diagnosis. Background technique: [0002] At present, DC system insulation monitoring devices whose principles are bridge method, AC signal injection method and DC leakage current measurement method are widely used in power plants and substations. However, with the extensive implementation of substation comprehensive automation, substations have gradually realized unmanned duty. The DC system insulation monitoring device composed of the above principles can monitor the insulation drop and give the fault branch, but the operator in the unattended substation cannot know the fault of the DC system. Invention content: [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a DC system insulation monitoring device with remote ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02G01R31/08
Inventor 束洪春司大军邱革非董俊孙向飞刘志坚张杰王肩雷
Owner KUNMING UNIV OF SCI & TECH
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