Harmonic duty allocation method based on AP cluster data screening

A technology of AP clustering and data screening, applied in the direction of measuring devices, instruments, measuring electronics, etc., can solve the problem of low precision

Active Publication Date: 2016-06-15
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0005] The present invention provides a harmonic responsibility division method based on AP clustering data s

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  • Harmonic duty allocation method based on AP cluster data screening
  • Harmonic duty allocation method based on AP cluster data screening
  • Harmonic duty allocation method based on AP cluster data screening

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[0027] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of means consistent with aspects of the invention as recited in the appended claims.

[0028] Each embodiment in this specification is described in a progressive manner, the same and similar parts of each embodiment can be referred to each other, and each embodiment focuses on the differences from other embodiments.

[0029] Please refer to figure 1 , which is a flow chart of a method for dividing harmonic responsibilities based on AP clustering data screening provided in an embodiment of the pres...

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Abstract

The invention provides a harmonic duty allocation method based on AP cluster data screening, and the method employs an AP clustering method. Through the clustering of harmonic impedance at a PCC place, the method finally achieves the estimation of system-side harmonic impedance through employing a person correlation coefficient and the sign symbol of estimated harmonic impedance, thereby achieving the harmonic duty allocation. The AP clustering method does not need to define a class number in advance, continuously searches proper clustering centers in an iteration process, automatically recognizes the positions and number of the class centers from data points, and enables the sum of the similarity of all data points to the nearest class representation point to be the greatest. In the beginning, the AP clustering method takes all the data points as the class centers, and achieves the clustering process through the information transmission among the data points. The AP clustering method is a deterministic clustering algorithm, and clustering results of a plurality of independent operations are very stable.

Description

technical field [0001] The invention relates to the technical field of harmonic source positioning at a public connection point of a power grid, in particular to a harmonic responsibility division method based on AP clustering data screening. Background technique [0002] Harmonic problem is an important aspect of power quality problem. With the development of power electronics technology, non-linear devices developed on the basis of various power electronics technologies, such as rectifiers, inverters and various switching power supplies, are rapidly popularized and widely used. These nonlinear devices inject a large number of harmonic currents into the grid, resulting in serious distortions in both voltage and current in the grid. The degree of harm of harmonics mainly depends on factors such as the magnitude of harmonics and site conditions. For example, harmonics cause power cable capacity to decrease, loss to increase, aging to increase, leakage current to increase, e...

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Application Information

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IPC IPC(8): G01R31/08
CPCG01R31/088
Inventor 郭成王辉刘炜李胜男覃日升赵泽平段锐敏
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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