基于SDAE和双模型联合训练的低压用户窃电检测方法

Detection method of electricity theft for low-voltage users based on SDAE and double-model joint training

用户窃电行为是电网企业运营管理的痛点,基于数据驱动的低压用户窃电检测是当前的重要发展方向。由于窃电数据集具有自身高维度且样本不平衡的特点,对窃电检测模型的拟合能力和泛化能力要求极高。为此,文章利用堆栈降噪自编码器对低压用户日用电量数据进行特征提取,通过挖掘数据的深层特征减少窃电产生的极端数据对检测模型的影响;进而提出逻辑回归与深度神经网络联合训练模型进行低压用户窃电检测,将逻辑回归模型的记忆能力与深度神经网络模型的泛化能力相结合,进一步提升窃电检测的精度。通过实际电网数据的实验仿真,从AUC值、准确率和召回值三个评价指标验证了所提出方法相对于传统机器学习算法具有明显的性能优势。

The behaviors of electricity theft have been continuously causing economic losses to the operation and management of power grid enterprises,while the detection of electricity theft for the data-driven low-voltage users is an important development direction at present.Due to the characteristics of high dimension and unbalanced sample in the data set of electricity theft,the fitting and generalization abilities of the detection model are highly required.On this basis,a method of detecting electricity theft by low-voltage users is proposed,which firstly uses the stacked de-noising auto encoder(SDAE)to extract the features from the daily power consumption data of low voltage users,and the influence of extreme data generated by electricity theft on the detection model is reduced by mining the deep characteristics of data.And then,a joint training model of logistic regression(LR)and deep neural network(DNN)is proposed to detect the electricity theft of low-voltage users,which combines the memory ability of LR model with the fitting and generalization abilities of DNN model to further improve the accuracy of electricity theft detection.Through the experimental simulation of actual power grid data,evaluation indicators of AUC value,accuracy rate,and recall value verify that the proposed method has obvious performance advantages over the traditional machine learning algorithm.