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Processing method for converting fault records into harmonics

A processing method and technology of wave recording and conversion, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as communication equipment and electronic equipment interference, and achieve fast analysis and processing, simple structure and flow, and simple processing methods intuitive effect

Inactive Publication Date: 2012-01-18
深圳市康必达中创科技有限公司
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  • Abstract
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Problems solved by technology

For the outside of the power system, harmonics will cause serious interference to communication equipment and electronic equipment

Method used

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  • Processing method for converting fault records into harmonics
  • Processing method for converting fault records into harmonics
  • Processing method for converting fault records into harmonics

Examples

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Embodiment Construction

[0015] figure 1 As shown in Fig. 1, a method for converting fault recording to harmonics is based on the expansion of the recording and analysis software in the power monitoring system. A program module combined with the recording and analysis software converts the recording files of fault harmonic electrical signals into Analysis and conversion output harmonic graphics, list display harmonic data, harmonic data can be stored as an excel file, the implementation process includes the following steps:

[0016] a. First, modify the wave recording analysis software program into a document with two views;

[0017] B. Calculate the harmonic content with the Fourier algorithm. In the step b, the fault harmonic linear circuit, the periodic non-sinusoidal signal utilizes Fourier series expansion to decompose it into a series of sinusoidal components of different frequencies. Lie formula:

[0018] f ( t ) = ...

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Abstract

The invention discloses a processing method for converting fault records into harmonics. The method comprises the following steps of: decomposing a periodic non-sinusoidal signal into a series of sinusoidal components with different frequencies; superposing the components according to a superposition theorem of a linear circuit to get response under excitation of the periodic non-sinusoidal signal; decomposing the non-sinusoidal excitation into a series of sinusoidal quantities with different frequencies; displaying the oscillographs of all harmonics, and additionally displaying the content of all harmonics in a list; and displaying a harmonics histogram at a certain time, and storing the harmonics histogram in an excel through data output. The processing method for the fault records is simple and intuitive, speedy in analysis and simple in structure flows.

Description

technical field [0001] The invention relates to a power system processing system, in particular to a fault recording-to-harmonic processing method. technical background [0002] The automatic fault record of power system has become an important basis for analyzing system accidents, especially for analyzing the action behavior of relay protection. In particular, the microcomputer-based fault recording device can record the electrical quantity and state change process information before and after the fault of the power grid, completely reflect the instantaneous change after the fault and the action behavior of the relay protection, and have data archiving and data reanalysis Ability. [0003] The harm of harmonics is very serious—harmonics reduce the efficiency of production, transmission and utilization of electric energy, overheat electrical equipment, generate vibration and noise, and age insulation, shorten service life, and even malfunction or burn out. Harmonics can ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00H02J3/00
Inventor 丁建义林峰平张孝山刘正方
Owner 深圳市康必达中创科技有限公司
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