Short-period forecast method for power load

Abstract

The invention relates to a short-period forecast method for a power load. The method comprises the following steps of (1) acquiring a historical power load data sequence, and calculating a hurst indexH of the historical power load data sequence; (2) building a fractional Brownian motion model according to the hurst index H; (3) performing global optimization on the hurst index H in the fractionalBrownian motion model to obtain optimal value Hgbest of the hurst index, and further obtaining a fractional Brownian motion optimization model; and (4) forecasting power load data by the fractional Brownian motion optimization model. Compared with the prior art, the method has the advantages that high-accuracy forecast is performed on short-period d instable power load data.

Description

technical field [0001] The invention relates to a power load forecasting method, in particular to a short-term power load forecasting method. Background technique [0002] Power load forecasting is an important part of power system operation and an important content of power dispatching. According to power dispatching, power system operators can determine the running time of the grid and reduce potential losses. Therefore, accurate power load forecasting helps operators grasp the future power development trend and better dispatch the grid. [0003] At present, there are many traditional power load methods, gray model (GM) is widely used in power load forecasting, however, the accuracy of power load forecasting is often affected by many factors, and the GM exponential growth law cannot deal with these factors, so that a reasonable prediction effect. Autoregressive Integrated Moving Average (ARIMA) has been successfully used to estimate electricity demand, but cannot handle ...

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