Research On Data Storage And Security Of Wide Area Measurement System Based On Cloud Computing

Wide area measurement system(WAMS) is an important part of the smart grid architecture, and the security of the entire smart grid is determined by the security of WAMS' data. With the wide application of wide area measurement system, the data generated by WAMS will be more and more. In view of the storage demand of large amount of data, the traditional data storage mode has more and more pressure.However, the distributed file system HDFS on Hadoop platform can effectively solve these problems. While HDFS platform has a significant advantage in sharing and storage of a large number of data, the security problems it brings can not be ignored. Therefore, it is an urgent problem to protect the security of WAMS data when the data is stored in cloud. Data encryption technology is the most basic method to ensure the confidentiality of data, which has important practical significance to protect the data security on smart grid storage platform. In this paper,the problems of storage and security of WAMS are studied with the following aspects of the job done.Firstly, the characteristics of WAMS data are analyzed,and HDFS is introduced to store data distributedly against the characteristics of large amount of WAMS data. At the same time, according to the characteristics of high security requirements of data, the two aspects of data integrity verification and privacy protection are studied.Secondly, according to the characteristics of large data volume as well as the high requirements of data real time and the data security, the cloud computing platform of smart power grid is designed. On the basis of it, according to security problems of data stored in cloud, the scheme of the data privacy protection and integrity verification were carried out separately.In connection with the privacy protection of data, using encryption technology is necessary, and this paper redesign the traditional AES algorithm in parallel, besides, put forward the data encryption scheme of WMAS based on Storm. This scheme can meet the need of fast and parallel data encrypting for WAMS data. In view of the problem of data integrity verification, the schemes of single audit and batch audit based on third party administrator(TPA) are proposed, and the security of the scheme is verified.Finally, to realize distributed storage and fast query to achieve the files, Hadoop cluster and HBase distributed database are built, and Storm-on-yarn is installed on the cluster. On Storm platform, parallel AES algorithm is verified to have the characteristics of low processing delay and high speed.