在MATLAB中通过神经网络对分布式电源的出力进行预测。

为了提高光伏发电功率预测的精度，本文在结合灰色预测算法（GM）与神经络预测算法优点的基础上，提出一 种基于灰色径向基函数（Radical Basis Function， RBF）和神经网络光伏发电功率预测模型。 该预测模型综合了灰色预 测算法所需历史数据少以及 RBF 神经网络预测算法自学习能力强的优点。 最后，运用南昌地区夏季和冬季晴天、阴 天、雨天光伏发电历史数据在 MATLAB 应用平台编程实现对 GM-RBF 神经网络预测模型的预测精度进行验证，得出 基于 GM-RBF 神经网络光伏发电预测模型在夏季晴天预测误差为 6.495%、夏季阴天预测误差为 12.146%、夏季雨天 预测误差为 21.531%、冬季晴天预测误差为 8.457%、冬季阴天预测误差 14.379%、冬季雨 天预 测 误 差为 18.495%，其 预测精度均高于灰色预测算法和 RBF 神经网络预测算法

most of the researches on PV power generation forecasting methods have problems such as long time for model training and propose an optimization. Using the BP(backpropagation) neural network, this learning algorithm is mainly applicable to multi-input, multi-output networks. It can rely on ready-made data and input and output without knowing the mathematical relationship between the mapping relationship in which input and output. The mapping relationship is learned and stored. In addition, BP neural networks have great advantages in dealing with non-linear problems and have strong generalization ability.

In this paper, we investigate the representation of wind power forecasting (WPF) uncertainty in the unit commitment (UC) problem. While deterministic approaches use a point forecast of wind power output, WPF uncertainty in the stochastic UC alternative is captured by a number of scenarios that include crosstemporal dependency. A comparison among a diversity of UC strategies (based on a set of realistic experiments) is presented. The results indicate that representing WPF uncertainty with wind power scenarios that rely on stochastic UC has advantages over deterministic approaches that mimic the classical models. Moreover, the stochastic model provides a rational and adaptive way to provide adequate spinning reserves at every hour, as opposed to increasing reserves to predefined, fixed margins that cannot account either for the system’s costs or its assumed risks.