Research On Information Security Of Multi-Service Oriented Distribution Communication Network

The information security of distribution communication network is an important technical prerequisite for ensuring the operation of power system.With the development of intelligent distribution network under the background of energy internet,the distribution network shows the new characteristics of increasing types of supporting services,types of access terminals and their number,which makes the research on information security of distribution communication network face new technical challenges.At present,there are potential security problems in distribution network,such as distribution terminal being controlled,communication protocol being monitored,control instructions being tampered with.etc.How to ensure the security of information and improve the encryption efficiency of business while transmitting information with high quality and speed has become an urgent problem in the encryption scheme of distribution communication network.Aiming at the above problems,this thesis takes the information security in the service transmission of distribution communication network as the research object,and carries out the research of information security architecture design,transmission method and service encryption strategy for multi-service distribution communication network.Firstly,based on the structure of distribution communication network,this thesis realizes a multi-service distribution communication network security architecture design,and puts forward a security protection scheme.Secondly,aiming at the secure transmission of business data communication,based on the proposed security architecture of distribution communication network,the research on secure transmission method of distribution data based on adaptive parameters of AES,and the research on hierarchical transmission method of multi-service dynamic security based on analytic hierarchy process are proposed.Based on the AES adaptive parameter-based distribution data security transmission method,the service security grading adopts a single-factor static grading method.Under the premise of ensuring service security,an encryption and decryption strategy based on AES algorithm is proposed.Through simulation experiments,Verify the efficiency of policy encryption efficiency;Multi-service dynamic security hierarchical transmission method based on analytic hierarchy process.This method uses multi-factor AHP method to dynamically classify service security,adopts multi-scale hybrid encryption data security transmission strategy,and studies the encryption efficiency of selected encryption algorithm through simulation experiments.The effectiveness of the strategy is verified by comparing the static and dynamic hierarchical encryption efficiency.Finally,for the distributed power supply service distribution network communication,through the communication-based layered encryption strategy design,a layered security strategy for distribution network with distributed power supply is proposed.The work of the thesis will provide a certain technical reference for the infonnation communication network to support the information security transmission of various services in the distribution network.