Harmonic correlation analysis based electricity system harmonic source recognition device

A technology of correlation analysis and harmonic sources, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems that have not been widely recognized

Inactive Publication Date: 2015-07-22
江苏中凌高科技股份有限公司
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Problems solved by technology

[0008] In addition to the harmonic active power direction method, people have also discussed some other methods of harmonic source identification, such as harmonic reactive power direction method, critical impedan

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  • Harmonic correlation analysis based electricity system harmonic source recognition device
  • Harmonic correlation analysis based electricity system harmonic source recognition device
  • Harmonic correlation analysis based electricity system harmonic source recognition device

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Embodiment Construction

[0025] Such as Figure 4 As shown, the present invention consists of K a harmonic parameter measurement unit 1, K It consists of a synchronization sequence generation unit 2, a harmonic-fundamental correlation matrix calculation unit 3, a harmonic-harmonic correlation matrix calculation unit 4 and a harmonic source identification unit 5.

[0026] Each harmonic parameter measurement unit 1 is respectively provided with a line voltage and current signal access unit, the signal output terminal of a harmonic parameter measurement unit 1 is connected to the signal input terminal of a synchronous sequence generation unit 2, and the signal of each synchronous sequence generation unit 2 The output terminals are respectively connected to the signal input terminals of the harmonic-fundamental correlation matrix calculation unit 3 and the harmonic-harmonic correlation matrix calculation unit 4, and the harmonic-fundamental correlation matrix calculation unit 3 and the harmonic-harmonic ...

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Abstract

The invention discloses a harmonic correlation analysis based electricity system harmonic source recognition device, and belongs to the technical field of electricity system harmonic analysis and evaluation. The harmonic correlation analysis based electricity system harmonic source recognition device comprises K harmonic parameter measuring units, K synchronous sequence generation units, a harmonic-fundamental wave correlation matrix calculation unit, a harmonic-harmonic correlation matrix calculation unit and a harmonic source recognition unit. The harmonic correlation analysis based electricity system harmonic source recognition device has the advantages that data, such as harmonic impedance, harmonic source parameters and nonlinear load parameters, of an electricity system do not need to be known accurately, and the defects of nonsynchronous monitoring of part of outgoing lines in the prior art are overcome; correlation characteristics of each outgoing line and each variable are disclosed, and accordingly, a brand-new road is opened up for harmonic source recognition of transformer substations.

Description

technical field [0001] The invention belongs to the technical field of power system harmonic analysis and evaluation. Background technique [0002] With the rapid development of the national economy, more and more nonlinear power equipment and nonlinear power loads are connected to the power system. While they bring many favorable factors to the power system, they also bring a lot to the power quality of the power system. Negative effects, such as voltage deviation, voltage fluctuation, harmonic pollution, etc., among which harmonic pollution is the most concerned issue. [0003] In view of the importance of harmonic pollution, harmonic monitoring and harmonic analysis and evaluation have become unprecedentedly active research fields. Harmonic source identification (or location) in harmonic analysis and evaluation is a major international problem. For this reason, Siemens Corporation of Germany List the identification of power grid harmonic sources as a current key research...

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Application Information

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IPC IPC(8): G01R31/00
Inventor 麻刚张海江王柏林
Owner 江苏中凌高科技股份有限公司
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