On-line detecting method and its device for multiple path transient wave form over voltage of power system

A power system, multi-channel technology, applied in the direction of the fault location, etc., can solve the problems of not being able to truly record various overvoltage waveforms of the power system, low sampling rate of the fault recorder, and undetectable high-frequency components, etc., to achieve high reliability High performance, strong anti-interference ability and convenient operation

Inactive Publication Date: 2005-10-19
西安博源电气有限公司
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Problems solved by technology

[0008] In view of the low sampling rate and shallow sampling depth of fault recording devices currently used in power systems, they cannot detect high-frequency components in some transient overvoltages, and cannot truly record various overvoltage waveforms suffered in power systems, etc. Insufficient, the object of the present invention is to provide a kind of power system multi-channel transient waveform overvoltage online detection method and its device

Method used

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  • On-line detecting method and its device for multiple path transient wave form over voltage of power system
  • On-line detecting method and its device for multiple path transient wave form over voltage of power system
  • On-line detecting method and its device for multiple path transient wave form over voltage of power system

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Embodiment Construction

[0029] According to the method described above, the present invention uses virtual instrument technology, uses an industrial control computer as a hardware platform, and combines a high-voltage voltage divider, a signal conditioning unit, an acquisition unit, and application software to form a multi-channel transient waveform overvoltage online detection device for a power system. State waveform online detection device.

[0030] In this embodiment, six high-voltage voltage dividers are used to introduce voltage signals from six detection points of the high-voltage bus. The cable connects the trigger signal output terminal and the six voltage signal output terminals of the signal conditioning unit with the trigger signal input terminal and the six voltage signal input terminals of the acquisition unit respectively, and the acquisition unit communicates with the industrial control computer through the PCI bus. When an overvoltage is detected, the signal conditioning unit sends a...

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Abstract

The multiple-path on-line transient waveform over-voltage detecting device for electric power system consists of high voltage divider, signal processing unit, industrial control computer and application software. The present invention leads in the voltage signals from different detection points in high voltage buses of different phases, the voltage signals are divided in the high voltage divider and processed in the signal processing unit, the processed voltage signals are fed to corresponding voltage signal inputs while the trigger signal the signal processing unit generates is fed to the trigger signal input of the acquisition unit communicating via PCI bus with the industrial control computer. When over-voltage is detected, the signal processing unit will send trigger signal informing the acquisition unit. The application software in the industrial control computer performs the program control of the whole detection process.

Description

technical field [0001] The invention relates to an on-line detection method and a device thereof, in particular to an on-line detection method and a device thereof for multi-channel transient waveform overvoltage in a power system. Background technique [0002] The reliability of power system power supply is judged by the number and duration of interruption of user power supply within a certain period of time (such as one year). Reliability depends to a large extent on the electrical shock resistance characteristics of the power system. Although there are many reasons that may cause interruption of power supply, insulation breakdown is the most common. [0003] In order to ensure the reliability of the power supply of the power system, all kinds of electrical equipment in the system should have sufficient and reliable electrical insulation strength. Under normal operating conditions, the insulation structure of these devices is under the action of the maximum operating volt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
Inventor 徐阳韦亚平张琪曹晓珑席保峰
Owner 西安博源电气有限公司
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