基于拟牛顿法小波神经网络的光伏发电系统短期功率预测模型

doi:10.11930/j.issn.1004-9649.2014.6.117.7

中国电力 ›› 2014, Vol. 47 ›› Issue (6): 117-124.DOI: 10.11930/j.issn.1004-9649.2014.6.117.7

基于拟牛顿法小波神经网络的光伏发电系统短期功率预测模型

杨超颖¹, 王金浩², 王硕³, 徐永海³, 黄浩³

1. 国网山西省电力公司,山西太原 030001;
2. 山西电力科学研究院,山西太原 030001;
3. 华北电力大学电气与电子工程学院,北京 102206

修回日期:2014-01-08 出版日期:2014-06-18 发布日期:2015-12-08
作者简介:杨超颖（1984—）,女,山西太原人,硕士,工程师,从事电力系统自动化的研究。E-mail: ycy629@126.com

A Forecasting Method of Short-Term Power Output of Photovoltaic System Based on Wavelet Neural Network Trained by Quasi-Newton Method

YANG Chao-ying¹, WANG Jin-hao², WANG Shuo³, XU Yong-hai³, HUANG Hao³

1. State Grid Shanxi Electric Power Company, Taiyuan 030001, China;
2. Shanxi Electric Power Research Institute, Taiyuan 030001, China;
3. School of Electrical & Electronic Engineering, North China Electric Power University, Beijing 102206, China

Revised:2014-01-08 Online:2014-06-18 Published:2015-12-08

摘要/Abstract

摘要： 光伏发电系统出力的随机性会对大电网造成冲击,需要加强光伏阵列发电功率预测的研究。为此,提出采用拟牛顿法小波神经网络建立光伏发电系统短期功率预测模型。以某光伏电站实测数据为比较对象,与基于标准梯度下降法BP神经网络以及基于附加动量和自适应学习速率结合的BP神经网络建立的2种预测模型进行对比研究,结果表明,拟牛顿法在收敛速度和预测精度上都更具有优势。此外,通过和拟牛顿法BP神经网络功率预测方法对比表明,拟牛顿法小波神经网络的预测精度更高,尤其是在一天早中晚时刻或辐照度较低情况下预测效果得到了很大的提高。

关键词: 光伏发电, 功率预测, 小波神经网络, BP神经网络, 拟牛顿法, 预测模型

Abstract: The randomness of the power output of a photovoltaic system has an impact on the power grid. So it is needed to strengthen the study of the power output forecasting of photovoltaic systems. In this paper, the short-term forecasting model of PV station power, based on wavelet neural network which is trained by quasi-Newton method, was proposed. The comparison experiments were made for the forecasting model above and the forecasting models based on BP neural network which is trained by quasi-Newton methed, traditional BP algorithm or combining increasing momentum method with varying learning rate method. The experimental results indicate that the short-term forecasting model of PV station power, based on BP neural network with quasi-Newton method, can significantly improve the precision of PV power prediction, and the method based on wavelet neural network with quasi-Newton method did better than that based on BP neural network. Especially, it can significantly improve the precision of PV power prediction under circumstance with low irradiance, such as in daily morning and evening time, rainfalls and snow as well as fluctuating power inflection point.

Key words: photovoltaic, power forecasting, wavelet neural network, BP neural network, quasi-Newton method, forecasting model

中图分类号:

TM615

杨超颖, 王金浩, 王硕, 徐永海, 黄浩. 基于拟牛顿法小波神经网络的光伏发电系统短期功率预测模型[J]. 中国电力, 2014, 47(6): 117-124.

YANG Chao-ying, WANG Jin-hao, WANG Shuo, XU Yong-hai, HUANG Hao. A Forecasting Method of Short-Term Power Output of Photovoltaic System Based on Wavelet Neural Network Trained by Quasi-Newton Method[J]. Electric Power, 2014, 47(6): 117-124.

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https://www.electricpower.com.cn/CN/Y2014/V47/I6/117

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基于拟牛顿法小波神经网络的光伏发电系统短期功率预测模型

A Forecasting Method of Short-Term Power Output of Photovoltaic System Based on Wavelet Neural Network Trained by Quasi-Newton Method

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基于拟牛顿法小波神经网络的光伏发电系统短期功率预测模型

A Forecasting Method of Short-Term Power Output of Photovoltaic System Based on Wavelet Neural Network Trained by Quasi-Newton Method

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