摘要
传统的阈值判定方法难以准确检测输变电设备的状态异常,该文提出一种基于时间序列分析和无监督学习等大数据分析的异常检测方法,从数据演化过程、数据关联的全新角度实现异常检测。通过时间序列模型和自适应神经网络对历史数据潜在的特征进行挖掘,并将数据对时间的动态变化规律用转移概率序列表示。针对多维的监测数据,运用无监督聚类方法简化各参量之间的相关关系,从而避免参量间相关性难以确定的问题。提出异常检测体系,并使之适用于输变电设备状态监测数据流,实现数据流中异常的快速检出。最后结合运行实例验证了提出方法的有效性,表明本方法能快速检测出设备的异常运行状态。
To detect the anomaly state of power equipment, the traditional method threshold value determination is unable to ensure the accuracy. This paper proposed a method for anomaly detection of state data of power equipment based on big data analysis from time series analysis and unsupervised learning, thus a new perspective of data association and data evolution was achieved. Mining the potential features through time series model and self-organized maps, the method put the original data series into the transition probability series. To simplify the relationship between the multidimensional state sequences, the unsupervised learning was used to form several clusters. The method proposed the anomaly detection framework which has a rapid detection speed and is applicable for the state data flow. At last, the effectiveness of the method is verified by being combined with running instances and the result shows that the abnormal operating state can be rapidly detected.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2015年第1期52-59,共8页
Proceedings of the CSEE
基金
国家863高技术基金项目(SS2012AA050803)
国家电网公司科技项目(520626140020)~~
关键词
大数据
异常检测
时间序列
神经网络
无监督聚类
big data anomaly detection time series neural network unsupervised clustering
