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A harmonic responsibility division method based on improved data association analysis

A data correlation, harmonic technology, applied in spectrum analysis/Fourier analysis, data processing applications, instruments, etc.

Inactive Publication Date: 2019-03-01
CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The invention provides a harmonic responsibility division method based on improved data association analysis, which solves the shortcomings of the existing methods, considers the user harmonic impedance in the calculation process, and reduces the traditional method due to neglecting the user harmonic impedance band. to the error

Method used

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  • A harmonic responsibility division method based on improved data association analysis
  • A harmonic responsibility division method based on improved data association analysis
  • A harmonic responsibility division method based on improved data association analysis

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Embodiment Construction

[0073] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0074] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0075] Simulation

[0076] This method uses Image 6 In the IEEE14 node standard test system as a calculation example, Image 6 1-14 in middle refers to the s...

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Abstract

The invention discloses a harmonic responsibility division method based on improved data correlation analysis, which comprises the following steps: step 1, under the condition that a harmonic phase angle is considered, establishing a relation between an h-order harmonic voltage and a harmonic current of a PCC point; 2, estimating the impedance angle of the power system based on the characteristicthat the covariance of the independent random variable is zero; 3, calculating the harmonic impedance of the power system based on the relation between the impedance angle of the power system, the harmonic voltage and the harmonic current; 4, obtaining harmonic voltage contributions of the user side and the power system side at the PCC point based on the harmonic impedance of the power system; User harmonic impedance is considered in the calculation process, and errors caused by neglecting the user harmonic impedance in a traditional method are reduced. Simulation analysis and actual engineering examples verify that compared with an existing method, the method can effectively suppress the influence caused by system harmonic change and user harmonic impedance, and a more accurate harmonic responsibility division result is obtained.

Description

technical field [0001] The invention relates to the field of harmonic responsibility division, in particular to a harmonic responsibility division method based on improved data association analysis. Background technique [0002] With the development of industry, various power electronic devices and nonlinear loads are widely used in various sectors of the national economy, and the problem of harmonic pollution in power systems, especially in distribution networks, is becoming increasingly serious. After the harmonic current flows into the power grid, it will generate harmonic voltage at the point of public connection (PCC point), causing voltage distortion and seriously affecting the power quality. Therefore, a reasonable assessment of the harmonic voltage responsibilities of the power system and users at the PCC point is a prerequisite for realizing power quality management and control. [0003] At present, the methods of dividing harmonic responsibilities at home and abro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06G01R23/16
CPCG01R23/16G06Q10/0639G06Q10/06395G06Q50/06
Inventor 夏榆杭段登伟刘怡君张正炜杨昕
Owner CHENGDU POWER SUPPLY COMPANY OF STATE GRID SICHUAN ELECTRIC POWER
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