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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 5812394, 9 pages
https://doi.org/10.1155/2017/5812394
Research Article

Short-Term Photovoltaic Power Generation Forecasting Based on Multivariable Grey Theory Model with Parameter Optimization

School of Computer and Information Engineering, Hubei University, Wuhan, Hubei 430062, China

Correspondence should be addressed to Wenyang Cao; moc.qq@567618875

Received 29 July 2016; Revised 6 December 2016; Accepted 26 December 2016; Published 19 January 2017

Academic Editor: Wanan Sheng

Copyright © 2017 Zhifeng Zhong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Owing to the environment, temperature, and so forth, photovoltaic power generation volume is always fluctuating and subsequently impacts power grid planning and operation seriously. Therefore, it is of great importance to make accurate prediction of the power generation of photovoltaic (PV) system in advance. In order to improve the prediction accuracy, in this paper, a novel particle swarm optimization algorithm based multivariable grey theory model is proposed for short-term photovoltaic power generation volume forecasting. It is highlighted that, by integrating particle swarm optimization algorithm, the prediction accuracy of grey theory model is expected to be highly improved. In addition, large amounts of real data from two separate power stations in China are being employed for model verification. The experimental results indicate that, compared with the conventional grey model, the mean relative error in the proposed model has been reduced from 7.14% to 3.53%. The real practice demonstrates that the proposed optimization model outperforms the conventional grey model from both theoretical and practical perspectives.