Method for applying partial least squares regression to power distribution network harmonic source positioning and detecting

A partial least squares, distribution network technology, applied in special data processing applications, electrical digital data processing, instruments, etc., can solve problems such as voltage drop, voltage interruption, etc.

Inactive Publication Date: 2014-06-04
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The most serious power quality problem

Method used

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  • Method for applying partial least squares regression to power distribution network harmonic source positioning and detecting
  • Method for applying partial least squares regression to power distribution network harmonic source positioning and detecting
  • Method for applying partial least squares regression to power distribution network harmonic source positioning and detecting

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings.

[0045] figure 1 In , the system and user equivalent circuit diagrams are given.

[0046] In the figure, V sh is the equivalent hth harmonic voltage source on the system side, Z sh is the equivalent h harmonic impedance of the system side, Z ch is the equivalent h harmonic impedance of the user side, I ch is the equivalent hth harmonic current source on the user side, V pcch is a certain harmonic voltage at the common connection point, I pcch is the harmonic current of a certain order of the common connection point, and PCC is the common connection point.

[0047] According to the circuit diagram, the equation can be listed:

[0048] V · sh = V · pcch + I · pc...

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Abstract

The invention belongs to the field of power quality managing, and discloses a method for applying the partial least squares regression to power distribution network harmonic source positioning and detecting. According to a model for carrying out equivalent transformation on the electrical power system side and the distortion user side and a harmonic voltage and a harmonic current signal which are obtained through synchronous measurement at the common coupling joint, a regression coefficient is dissolved through the partial least squares regression algorithm, an aggregative variable with the best explanatory capability for a dependent variable is extracted in the manner of decomposing and screening data information in the system, and information and noise in the system are identified. The method integrates the basic functions of multiple linear regression, the canonical correlation analysis and the principal component analysis, the modeling predicting type data analysis method and non-model type data recognition are organically combined, regression modeling, data structure simplifying and variable correlation analyzing can be achieved at the same time, and the method can be widely applied to power quality analyzing, monitoring, evaluating and controlling fields.

Description

technical field [0001] The invention belongs to the field of power quality management, and in particular relates to a method for locating and detecting harmonic sources of distribution networks. Background technique [0002] With the progress of society and the rapid development of modern power industry, electric energy has become a widely used energy source, and its application degree has also become one of the main symbols to measure a country's development level. Electric energy is an economical, practical, clean, and easy-to-control and convertible energy form. It is a special product that the power supply department provides to power users with quality guaranteed by the three parties of power generation, supply, and consumption. With the widespread application of power electronics technology and the increasing impact loads such as electric arc furnaces and drag loads such as electric locomotives, it is becoming more and more difficult for the power industry to maintain ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 罗祾潘爱强金家培陈甜甜
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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