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Power quality steady-state index prediction method and system

A technology of power quality and prediction method, which is applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., and can solve the problems of unable to predict power quality steady-state indicators and low accuracy

Active Publication Date: 2016-10-26
GUANGZHOU POWER SUPPLY CO LTD +1
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Problems solved by technology

However, this method has the disadvantage of low accuracy and cannot effectively predict the steady state index of power quality.

Method used

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  • Power quality steady-state index prediction method and system
  • Power quality steady-state index prediction method and system
  • Power quality steady-state index prediction method and system

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[0055] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0056] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describin...

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Abstract

A method and system for predicting power quality steady-state indicators, which obtain monitored historical data within a preset time period, and calculate active power within a predicted time period based on historical active power using a time series algorithm to obtain predicted active power. According to the predicted active power and historical data, the regression analysis method is used to calculate the power quality steady-state index data in the forecast period, and the predicted power quality steady-state index data is obtained. Since the active power of the power grid is relatively stable, the active power in the forecast period is predicted by using the time series algorithm according to the historical active power, and the predicted active power is obtained. Then, according to the predicted active power and historical data, the regression analysis method is used to calculate and predict the steady-state index data of power quality, which has high accuracy and can effectively predict the steady-state index of power quality, providing guarantee for the safe operation of the power grid and avoiding power quality problems. Impact.

Description

technical field [0001] The invention relates to the technical field of electric energy quality prediction, in particular to a method and system for predicting a steady-state index of electric energy quality. Background technique [0002] Power quality problems can be divided into steady state power quality problems and transient power quality problems. Among them, steady-state power quality problems include voltage deviation, frequency deviation, three-phase unbalance, short-term flicker and harmonics. There are many kinds of power quality problems, and the harm caused is also different. For example, the harm caused by voltage deviation is obvious. If the voltage is too high, the insulation equipment will be damaged, and if the voltage is too low, the speed of the asynchronous motor will be reduced, which will affect the product quality. The influence of frequency deviation is that when the frequency is low, the blades of the low-pressure stage of the steam turbine will ha...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 王劲黄慧红许中崔晓飞马智远马素霞王军刘宇苏卫卫李丝媛陈国炎杜堉榕覃煜栾乐方建
Owner GUANGZHOU POWER SUPPLY CO LTD
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