针对水轮机调节系统隐蔽攻击的混沌跳频扩频防御方案  

Chaotic Frequency-Hopping Spread Spectrum Defense Scheme for Covert Attacks of Hydraulic Turbine Regulating System

作　　者：黄宇[1] 孙茜 宁笑歌 张鹏[1] 谢家乐 王东风[1] HUANG Yu;SUN Xi;NING Xiaoge;ZHANG Peng;XIE Jiae;WANG Dongfeng(Department of Automation,North China Electric Power University,Baoding 071003,China)

机构地区：[1]华北电力大学自动化系,河北保定071003

出　　处：《电力科学与工程》2024年第9期62-70,共9页Electric Power Science and Engineering

基　　金：国家自然科学基金资助项目(52207235)。

摘　　要：水轮机调节系统作为水电机组的关键部分,其安全运行至关重要。为提高水轮机调节系统的安全性,设计了一种防御方案,检测并防御系统中潜在的隐蔽攻击。首先通过对系统信号进行混沌跳频调制和解调,消除隐蔽攻击的不良影响;其次,基于理论分析,推导出维持系统稳定的跳频频率约束,保证系统性能不因加入跳频/扩频信号和频率异步现象而受损。仿真结果表明,该方案能够在非高斯噪声环境中持续检测和防御不同类型的高强度隐蔽攻击,且不影响系统正常运行。此外,所提出的防御方案还具有复现隐蔽攻击信号的能力,这有助于操作员了解攻击信息并采取针对性措施。As a key part of hydropower units,the safe operation of the hydraulic turbine regulating system is very important.Aiming at improving the security of the system,a defense scheme is designed to detect and defend against the potential covert attacks in the system.Firstly,the adverse effects of covert attacks can be eliminated by performing chaotic frequency hopping modulation and demodulation on the system signals.Then,through theoretical analysis,the frequency hopping constraints are derived to maintain the stability of the system and ensure that the system performance will not be damaged by adding frequency hopping/spread spectrum signals and frequency asynchronism phenomenon.Simulation results show that the proposed scheme can continuously detect and defend against different types of high-intensity covert attacks in environments with non-Gaussian noise without affecting the normal operation of the hydropower units.Moreover,the proposed scheme can reproduce covert attack signals,which can help operators understand the attack information and take targeted measures.

关 键 词：隐蔽攻击 攻击防御 混沌跳频 水轮机调节系统 攻击检测 

分 类 号：TV734.1[水利工程—水利水电工程]