Cyber-Physical Attack Leveraging Subsynchronous Resonance
Cyber-Physical Attack Leveraging Subsynchronous Resonance
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DOI：
10.48550/arxiv.2207.04149
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发表时间：
2022-07
期刊：
影响因子：
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通讯作者：
Bosong Li;Baosen Zhang;D. Kirschen
中科院分区：
文献类型：
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作者：
Bosong Li;Baosen Zhang;D. Kirschen
- 本文讨论了网络攻击如何利用涡轮发电机轴中的扭转共振对电力系统造成严重的物理破坏。如果攻击者能够接管电池储能设备的控制，他们可以在与发电机的次同步谐振频率之一匹配的频率下调制该设备的注入。注入中的微小变化可能足以激发这些机械共振之一，导致金属疲劳并最终导致发电机轴的灾难性故障。利用机电系统的状态空间模型，本文开发了将恶意注入的幅度与连接到轴的各个质量的速度和角度的振荡幅度联系起来的传递函数。从两个区域的电力系统的数值计算结果表明，存在脆弱的频率，并表明，破坏性的机械振荡可以触发，而不会引起容易检测到的信号在发电机终端。
—This paper discusses how a cyber attack could take advantage of torsional resonances in the shaft of turbo-generators to inflict severe physical damage to a power system. If attackers were able to take over the control of a battery energy storage device, they could modulate the injection of this device at a frequency that matches one of the sub-synchronous resonance frequencies of a generator. Small changes in injection might be sufficient to excite one of these mechanical resonances, resulting in metal fatigue and ultimately a catastrophic failure in the shaft of the generator. Using a state-space model of the electromechanical system, the paper develops transfer functions linking the magnitude of the malicious injections to the magnitude of oscillations in the speed and angle of the various masses connected to the shaft. Numerical results from a two-area power system demonstrate the existence of vulnerable frequencies and show that damaging mechanical oscillations can be triggered without causing easily detectable signals at the generator terminals.