摘要
由于微电网蓄电池工作时的电力特性具有明显的非线性和不规则性,依靠传统数学方法难以准确估计其荷电状态(state of charge,SOC)。针对上述问题,构建了BP神经网络拓扑结构,并采用增强型学习率自适应算法对网络的传统学习模式加以改进,学习时神经网络模型中各神经元间权值得到合理调整,并且提高了误差收敛效率。仿真结果表明,估计结果在预设精度要求的范围之内,平均误差不超过4%,证明经过优化学习算法的BP神经网络模型对蓄电池荷电状态的精确估计是有效可行的。
The electric characteristic of micro-grid＇ s battery has obvious nonlinearity and irregularity at work, it is difficuh to accurately estimate the using the traditional mathematical methods. According to the problem above, the topology of back propagation （BP） neural network is constructed, and the network model is trained with new adaptive algorithm to improve the traditional learning model, the weights among neurons in the neural network model are adjusted reasonably, and the error is reduced with higher efficiency. The simulation result shows that the estimated results are within the scope of pre-set accuracy, the average error is less than 4%. It indicates that the BP neural network using the optimized algorithm can accurately estimate the state of charge, the attempt is effective and feasible.
出处
《电子测量与仪器学报》
CSCD
北大核心
2017年第12期2042-2048,共7页
Journal of Electronic Measurement and Instrumentation
基金
国家自然科学基金(61673165)
湖南省自然科学基金(2017JJ4024)
湖南省教育厅开放基金(15k036)
湖南省重点实验室(2016TP1018)资助项目
