A wide area damping controller (WADC) is designed in this paper to mitigate the frequency deviation of interconnected power system. The effect of time delay during wide area measurement system (WAMS) and saturation of the actuator is also considered in this work while designing the WADC. The effect of communication delay along with the saturation of a actuator can make the interconnected power system unstable. This paper focuses on finding a stabilization criterion of the power system connected with a WADC. The WADC is designed taking the effect of time-varying delay in the WAMS and saturation of the actuator into consideration. The saturation of the actuator is modelled with the help of dead zone type non-linearity. In this paper, a Lyapunov–Krasovskii functional is used to design a state feedback control law based on linear matrix inequality (LMI) taking time-varying delay and the actuator saturation into consideration. A thyristor controlled series capacitor (TCSC) is used as an actuator. A supplementary damping controller (SDC) is used as the WADC in this paper to provide sufficient damping. Simulation study on four machine 11 bus power system and New England 39 bus power system is performed to understand the performance of the designed controller. The results are also verified in real-time using OPAL-RT.

本文设计了一种广域阻尼控制器（WADC），以减轻互连电力系统的频率偏差。在设计WADC时，这项工作还考虑了广域测量系统（WAMS）中的时间延迟和执行器饱和的影响。通信延迟的影响以及执行器的饱和会导致互连的电源系统不稳定。本文着重于找到与WADC连接的电力系统的稳定标准。WADC的设计考虑了WAMS中随时间变化的延迟和执行器饱和的影响。执行器的饱和度借助盲区类型非线性建模。在本文中，使用Lyapunov–Krasovskii函数设计基于线性矩阵不等式（LMI）的状态反馈控制律，其中考虑了时变延迟和执行器饱和。晶闸管控制的串联电容器（TCSC）用作致动器。本文使用辅助阻尼控制器（SDC）作为WADC，以提供足够的阻尼。对四机11母线电源系统和新英格兰39母线电源系统进行了仿真研究，以了解所设计控制器的性能。还使用OPAL-RT实时验证了结果。对四机11母线电源系统和新英格兰39母线电源系统进行了仿真研究，以了解所设计控制器的性能。还使用OPAL-RT实时验证了结果。对四机11母线电源系统和新英格兰39母线电源系统进行了仿真研究，以了解所设计控制器的性能。还使用OPAL-RT实时验证了结果。