Utilization of a communication network to transmit remote-control signals might introduce time delay into the control loop, which degrades the controller efficacy. This paper proposes a new design of wide-area damping controller based on scattering transformation to enhance power system stability. The proposed control approach is comprised of a classical structure in addition to two scattering transformation ports. These ports are inserted between the power system and the wide-area damping controller (WADC) to regulate the signal exchanging between them. Since the WADC is a centralized controller, the time-delay imperfections are considered in the design stage. The proposed controller improves the system damping performance thanks to the achieved time-delay compensation. The effectiveness of the proposed controller is demonstrated by implementing the controller in several case studies under different disturbance scenarios. The proposed controller performance is benchmarked with the classical WADC based on lead-lag structure. The efficacy of the proposed controller is confirmed to reduce the time delay resulting in a better power system stability.

利用通信网络传输远程控制信号可能会在控制环路中引入时间延迟，从而降低控制器的效率。为提高电力系统的稳定性，本文提出了一种基于散射变换的广域阻尼控制器的新设计。所提出的控制方法除了两个散射转换端口外，还包括经典结构。这些端口插入电源系统和广域阻尼控制器（WADC）之间，以调节它们之间的信号交换。由于WADC是集中式控制器，因此在设计阶段就考虑了时延缺陷。所提出的控制器由于实现了时延补偿而提高了系统的阻尼性能。通过在不同干扰情况下的几个案例研究中实施该控制器，可以证明所提出控制器的有效性。建议的控制器性能以基于超前-滞后结构的经典WADC为基准。证实了所提出的控制器的功效以减少时间延迟，从而导致更好的电力系统稳定性。