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

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...

AI Technical Summary

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

Images