Distribution network unbalanced harmonic load index prediction method

A technology of load index and prediction method, applied in the field of distribution network, can solve the problems of inability to coordinate and synchronize harmonic unbalance degree, unable to effectively utilize power grid resources, and not considering the process of unbalanced harmonic level in distribution network, etc. Reasonable voltage balance level, improving reliability and economy, and avoiding the effect of harmonic imbalance

Inactive Publication Date: 2016-02-24
STATE GRID CORP OF CHINA +3
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Problems solved by technology

[0002] The distribution network and its many electrical equipment that generate harmonics constitute a complex system. How to predict and evaluate the unbalanced harmonic load index of the distribution network according to the operating characteristics of the distribution network and each electrical equipment, so that each distribution network It is one of the key issues related to the intelligent level of the distribution network. In the past, harmonic detection and control The method does not consider the level of unbalanced harmonics in the distribution network and its effect on the distribution network and the electrical equipment. Each system of the distribution network or the electrical equipment independently detects a

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  • Distribution network unbalanced harmonic load index prediction method
  • Distribution network unbalanced harmonic load index prediction method
  • Distribution network unbalanced harmonic load index prediction method

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[0028] In order to better understand the present invention, the content of the present invention is further illustrated below in conjunction with the examples, but the content of the present invention is not limited to the following examples. Those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms are also within the scope of the claims listed in this application.

[0029] like figure 1 As shown, a method for predicting unbalanced harmonic load index of a distribution network provided by an embodiment of the present invention has the following steps:

[0030] Step 1: Establish the time series of the distribution network unbalanced harmonic load index evolution system:

[0031] Measure the three-phase voltage harmonics, temperature, and humidity at fixed time intervals, and divide the difference between the maximum value of the three-phase voltage harmonic measurement value and the historical minimum value by the ...

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Abstract

The present invention provides a distribution network unbalanced harmonic load index prediction method. The method comprises: establishing a time sequence of a distribution network unbalanced harmonic load index evolutionary system, processing measured data of the time sequence by a nonlinear simplex method, and performing reflection operation on a vertex target function value so as to perform prediction calculation of a distribution network unbalanced harmonic load index and obtain a prediction value of the distribution network unbalanced harmonic load index. According to the method provided by the present invention, the prediction calculation can be performed on the distribution network unbalanced harmonic load index according to monitored parameters, a harmonic level can be controlled in real time according to a calculation result; the harmonic unbalance phenomenon can be effectively avoided; and reliability and economy of a distribution network system can be significantly improved.

Description

technical field [0001] The invention belongs to the technical field of distribution network, in particular to a method for predicting unbalanced harmonic load index of distribution network. Background technique [0002] The distribution network and its many electrical equipment that generate harmonics constitute a complex system. How to predict and evaluate the unbalanced harmonic load index of the distribution network according to the operating characteristics of the distribution network and each electrical equipment, so that each distribution network It is one of the key issues related to the intelligent level of the distribution network. In the past, harmonic detection and control The method does not consider the level of unbalanced harmonics in the distribution network and its effect on the distribution network and the electrical equipment. Each system of the distribution network or the electrical equipment independently detects and controls the harmonics, and cannot con...

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/06
CPCY04S10/50
Inventor 杨立滨滕云张海宁李春来杨军赵国新卢芸
Owner STATE GRID CORP OF CHINA
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