A microgrid load prediction method based on an LSSVM neural network

A load forecasting and neural network technology, applied in neural learning methods, biological neural network models, forecasting, etc., can solve problems such as increased forecasting errors, low forecasting accuracy, and uneven load characteristic curves, so as to improve accuracy, learn High efficiency and global optimal effect

Inactive Publication Date: 2019-04-23
KUNMING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

The microgrid load has obvious fluctuations and sudden changes, resulting in an unsmooth load characteristic curve. For load forecasting, the greater the change in load characteristics, the lower the prediction accuracy.
Scholars at home and abroad have covered a wide range of research on microgrids, but there are still too many uncertain factors; some methods have improved the convergence speed and solved local optimization problems, but with the increase of the prediction period, the prediction error will also increase. increase

Method used

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  • A microgrid load prediction method based on an LSSVM neural network
  • A microgrid load prediction method based on an LSSVM neural network
  • A microgrid load prediction method based on an LSSVM neural network

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Embodiment 1

[0034] Embodiment 1: a kind of microgrid load forecasting method based on the neural network of LSSVM, comprises the following steps:

[0035] Step 1 normalizes and preprocesses the historical data of the microgrid to form a training sample set; since the dimension and magnitude of the characteristic indexes are not the same, the effect of a characteristic index with a particularly large magnitude on the classification may be highlighted during the calculation process. In order to eliminate the influence of the difference in characteristic index units and the different magnitudes of characteristic indexes, it must be normalized so that each index value is unified in a certain common numerical characteristic range.

[0036] (1) Normalization of load data

[0037] Apply logarithmic treatment to the loadings:

[0038] x' ab = lg(x ab ) (2.1)

[0039] where x ab is the original load, x′ ab is the normalized load.

[0040] (2) Division and standardization of day types

[00...

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Abstract

The invention relates to a microgrid load prediction method based on an LSSVM neural network, and belongs to the field of microgrid loads. The invention provides a load prediction method based on a least square support vector machine technology in combination with a neural network, and the method is characterized in that firstly, model parameters of a least square support vector regression machineare optimized by using an ant colony algorithm, the regression machine is trained by using an optimized model, the regression machine provides better structure and parameters for an RBF neural network, and finally, a prediction result is obtained through matlab simulation training. According to the invention, the micro-grid coincidence prediction accuracy is improved.

Description

technical field [0001] The goal of the microgrid load forecasting proposed in this paper is to take into account the algorithm efficiency and network performance, improve the accuracy of power forecasting, and make the forecasting reach the global optimum. Background technique [0002] With the rapid development of modern information technology and the continuous improvement of the automation level of the power system, the power load forecasting method is also continuously improved and perfected. The existing power load forecasting methods can be roughly divided into two categories: traditional forecasting methods and artificial intelligence forecasting methods. Traditional forecasting methods include time series method, trend extrapolation method, gray model method and regression model method, etc. Artificial intelligence forecasting methods include fuzzy reasoning, neural network, wavelet analysis and expert system methods. The microgrid load has obvious fluctuations and...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06G06N3/00G06N3/04G06N3/08G06N20/10
CPCG06N3/006G06N3/08G06Q10/04G06Q50/06G06N3/045Y04S10/50
Inventor 唐菁敏马含
Owner KUNMING UNIV OF SCI & TECH
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