Cai Xin, Chen Xingzhi, Gao Bingpeng, Nan Xinyuan
School of Electrical Engineering, Xinjiang University, Urumqi 830017, China.
ISA Trans. 2024 Dec;155:228-236. doi: 10.1016/j.isatra.2024.09.023. Epub 2024 Sep 24.
Distributed control of AC microgrids is one of the most popular methods in the islanded operation mode. Whereas, most of the existing studies either do not consider the potential threat of privacy security or rely on the assumption of ideal communication networks. To this end, this paper presents a novel privacy-preserving distributed secondary frequency control strategy for the privacy protection problem of an islanded AC microgrid with constrained communication. The key contributions of this paper are threefold. (1) Different from the existing privacy-preserving approaches used in AC microgrids, a time-varying function is introduced to mask interactive information such that the frequency cannot be reconstructed by malicious attackers. (2) An event-triggered communication scheme is employed to cope with the constrained communication environment. (3) A privacy-preserving distributed event-triggered control strategy with communication delay is developed such that the frequency restoration and active power sharing of the microgrid are guaranteed. Moreover, the maximum communication delay that the proposed control can withstand is analyzed. Simulation results show the properties of the privacy preservation, the decrease of communication load, and the bounded communication delay allowed in the proposed control strategy.
分布式控制的交流微电网是孤岛运行模式中最流行的方法之一。然而，现有的大多数研究要么没有考虑隐私安全的潜在威胁，要么依赖于理想通信网络的假设。为此，本文针对通信受限的孤岛交流微电网的隐私保护问题，提出了一种新颖的隐私保护分布式二次频率控制策略。本文的主要贡献有三个方面。(1) 与交流微电网中现有的隐私保护方法不同，引入了一个时变函数来掩盖交互信息，使恶意攻击者无法重建频率。(2) 采用事件触发通信方案来应对通信受限环境。(3) 开发了一种具有通信延迟的隐私保护分布式事件触发控制策略，以保证微电网的频率恢复和有功功率分配。此外，分析了所提出的控制能够承受的最大通信延迟。仿真结果表明了所提出的控制策略具有隐私保护特性、通信负载的降低以及允许的有界通信延迟。
