Research On Security Situation Awareness Technology Of Smart Distribution Network

The smooth operation of distribution networks,which are characterized by multiple data sources,large data volumes,and the need to understand the operation situation of complex systems,is directly related to the livelihood of society and national security.Situational Awareness is an important technology to the distribution network.Because it has some abilities that “perceive” the data“understand” the operation situation and “predict” the future development trend,which can help the distribution network to improve its level of intelligence and ensure its safe and stable operation.Therefore,this paper does a lot of research of the Situational Awareness based on distribution networks.Based on the research of a large amount of related domestic and foreign literatures,this paper makes the distribution network as main research object,the Situational Awareness as an entry point and the IEEE 39-node system(a typical model of high-voltage distribution network)as the experimental object.This paper established the security situational assessment index system of distribution network,assessed the security situation,predicted the development of the distribution network’s security situation,built an intelligent prototype distribution network security situational awareness system,and studied the technology in helping the prototype system to improve its ability of defending,etc.The main achievements are as follows:1.In the situation assessment technology of distribution networks,this paper established a security situation awareness system model of distribution network,and put forward an evaluation method which is named A&M to realize the assessment of the distribution network security situation.Experimental results show that this method is better than the single method.2.In the situational prediction technology of the Situational Awareness,this paper put forward a prediction method which is named GRA(GP+BP).The IEEE39-node system is selected as the experimental object,and the prediction of the development of the security posture in distribution network is achieved by this method.Experimental results show that this method is better than the single method.3.Based on these results above,this paper designed and implemented a prototype system of intelligent distribution network security situational awareness.The visualization of the distribution network security situational awareness was realized.4.According to the above prototype system,a network security situation assessment technology based on intrusion detection and Attack Graph combined with Hidden Markov Model is proposed to realize the network security situation assessment of the prototype system.Experimental results show that this method can reflect the security situation of the system effectively.