面向SCADA的网络攻击对电力系统可靠性的影响

电力系统的运行和控制越来越依赖于数据采集与监控(SCADA)系统。通过攻击SCADA,攻击者可以操纵信息或重新配置设备动作参数使断路器跳闸。考虑几种常见的攻击SCADA使断路器跳闸的方式,利用攻击树模型评估不同攻击场景的成功率。在断路器常规可靠性模型基础上,考虑SCADA受网络攻击的影响,建立断路器修正后的强迫停运率模型。利用非序贯蒙特卡洛方法计算电力系统可靠性指标。用IEEE-RTS79系统仿真,分析不同攻击场景对电力系统可靠性的影响,验证了该方法的可行性与有效性。

Effect of SCADA-oriented cyber attack on power system reliability

The operation and control of power systems are increasingly dependent on the Supervisory Control and Data Acquisition (SCADA) system. By attacking SCADA, an attacker can manipulate the information or reconfigure the device parameters to trip the circuit breaker. This paper considers several common ways to attack SCADA to trip the circuit breaker, and uses the attack tree model to evaluate the success rate of different attack scenarios. On the basis of the conventional reliability model of the circuit breaker, and considering the influence of SCADA cyber attacks, a revised forced outage rate model of the circuit breaker is established. Non-sequential Monte Carlo method is used to calculate power system reliability index. IEEE-RTS79 system simulation is used to analyze the influence of different attack scenarios on the reliability of power system, which verifies the feasibility and validity of the method. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2015AA050104).