配电网信息物理故障的耦合度计算方法  

Calculation Method for Coupling Degree of Cyber-Physical Fault in Distribution Networks

作　　者：秦汉 刘东[1] QIN Han;LIU Dong(Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education(Shanghai Jiao Tong University),Shanghai 200240,China)

机构地区：[1]电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市200240

出　　处：《电力系统自动化》2021年第3期76-82,共7页Automation of Electric Power Systems

基　　金：国家重点研发计划资助项目(2017YFB0903000);国家电网公司科技项目(电网信息物理系统分析与控制的基础理论与方法,SGRIJSKJ〔2017〕1033)。

摘　　要：配电网信息物理系统(CPSDN)中信息系统和物理系统深度耦合,使得信息和物理故障可以相互耦合对配电网的运行造成影响。文中提出一种配电网信息物理故障的耦合度计算方法,从故障危害的角度评估信息与物理系统间的耦合程度。首先,在分析信息物理协同攻击(CCPA)对CPSDN影响的基础上,综合考虑攻击造成的故障危害及节点的防护水平,给出故障概率的计算方法。然后,通过节点耦合度(CDBN)对异构系统节点间故障的相关程度进行计算,并基于CDBN来计算节点与系统间耦合度(CDBNS)、系统间耦合度(CDBS)。最后,以一个包含3条馈线的配电系统作为算例,验证了所提计算方法的合理性和有效性。Since the cyber system and the physical system in the cyber-physical system for distribution network(CPSDN)are deeply coupled,the cyber and physical failure can couple with each other to affect the operation of the distribution network.This paper proposes a coupling degree calculation method,which evaluates the coupling degree between the cyber and physical system from the perspective of fault hazard.Firstly,based on analyzing the impact of coordinated cyber-physical attack(CCPA)on CPSDN,considering the fault hazard caused by attacks and the protection level of nodes,a probabilistic expression of faults is given.Then,the correlation degree of node failures between heterogeneous systems is calculated through the coupling degree between nodes(CDBN),and the coupling degree between node and system(CDBNS)and coupling degree between systems(CDBS)are calculated based on CDBN.Finally,a distribution network with three feeders is used as an example to verify the rationality and effectiveness of the proposed method.

关 键 词：配电网信息物理系统 耦合度 信息物理协同攻击 定量评估 

分 类 号：TM73[电气工程—电力系统及自动化]