Electric energy quality and electrical power system malfunction detection wave recording device and method

A power system and power quality technology, applied in measurement devices, fault locations, electrical signal transmission systems, etc., to achieve high performance, reduced size and power consumption, and low power consumption

Inactive Publication Date: 2008-01-02
NORTHEASTERN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the existing power fault wave recording equipment, the present invention provides a power quality and power system fault detection wave recording device and method

Method used

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  • Electric energy quality and electrical power system malfunction detection wave recording device and method
  • Electric energy quality and electrical power system malfunction detection wave recording device and method
  • Electric energy quality and electrical power system malfunction detection wave recording device and method

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Embodiment Construction

[0250] As shown in Figure 1, the system of the present invention includes a detection and recording subsystem, a remote monitoring subsystem, and a time synchronization subsystem.

[0251] The hardware part of the detection and recording device includes a signal conditioning module, a signal processing module, a communication scheduling module and a system power supply part, as shown in Figure 7.

[0252] The signal conditioning module uses the 16-bit high-precision bipolar analog input AD7656 as the ADC conversion chip in the subsequent signal processing unit; the wave recording criterion algorithm mainly uses the waveform data in the time-frequency domain to be converted into the frequency domain through the FFT algorithm to calculate different The component size in the frequency domain, combined with the specific criterion conditions, realizes fault recording, as shown in Figure 5.6.

[0253] The signal processing module uses a high-speed and high-precision DSP chip, and th...

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Abstract

A kind of fault detection oscilloscope device and method for the quality of power and the electrical system are disclosed, which belongs to the field of detection technique of electric system, and it includes three subsystems: detection oscilloscope subsystem, remote-control monitor subsystem, and time setting subsystem; the oscilloscope subsystem can do multi-point diagnosis for electric system, and detects and records the quality parameters of power; the remote-control monitor subsystem consists of precedence sever and Internet client, and it can realize the double action that transmitting fault information and monitoring the daily running of protective and safe device; the time setting subsystem provides the system time and insures the time synchronization with system; the realizing method includes dynamic parameter measurement, fault time division; starting criterion, fault oscilloscope, uploading record, and remote-control command procession. The invention realizes the digitalization, network, intelligent, and integration of detection oscilloscope device, and it can improve the quality of power, ensure the equipment running safely and steadily.

Description

technical field [0001] The invention belongs to the technical field of power system detection. Background technique [0002] The existing power quality and power system fault detection basically adopt the products of the 1990s. Most of these wave recorders are converted from the structure of microcomputer relay protection devices, using analog-to-digital converters with a resolution of 12 bits or lower. Bit single-chip microcomputer, on-chip RAM capacity is also very small, communicate through serial port or parallel port. In recent years, DSP chip technology has developed rapidly, and with the rapid improvement of power system automation level, many performance indicators of the original fault recorder are obviously lagging behind, especially in high-speed fault recording and recording data analysis. behind. [0003] The power fault recorders in the 1990s were basically microcomputer devices that worked independently, and their internal storage devices needed to be backe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C19/00G01R31/00G01R31/08
Inventor 张振川张石赵旭吴菁晶崔嵩楠王鑫
Owner NORTHEASTERN UNIV
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