University of Sistan and Baluchestan International Journal of Industrial Electronics Control and Optimization 2645-3517 5 2 2022 06 01 Adaptive Delay Compensator Based H_2/H_∞ Wide-Area Controller to Improve the Damping of Inter-Area Oscillations 189 204 6976 10.22111/ieco.2022.40754.1397 EN Esmaeel Rokrok Engineering Department, Lorestan University, Lorestan, Iran. Saman Dehghaninejad Department of Electrical Engineering, Lorestan University, Khorramabad, Iran Amir Hossein Poursaeed Department of Electrical Engineering, Lorestan University, Khorramabad, Iran Journal Article 2021 11 28 Recent technical advances in Wide-Area Measurement Systems (WAMS) have made it possible to use a combination of measured signals from remote locations to design centralized control. However, the transmission delay of remote signals and changes in the power system operating point are significant issues in the operation of the Wide-Area Damping Controller (WADC). Regarding issues and uncertainties in the power system, mixed H_2/H_∞ synthesis has been proposed for wide-area robust controller design. In this paper, an adaptive wide-area robust controller for Thyristor Controlled Series Capacitors (TCSC) is presented to improve the inter-area oscillation damping in multi-machine power systems in which the time-varying delays in feedback signal time are taken into account. So, an Adaptive Delay Compensator (ADC) is used to compensate for the delay of receiving remote signals. Despite the nonlinearity of the power system, the changes in the operating point, and the presence of time-varying delays, the proposed scheme shows robust performance in damping the low-frequency oscillations. The efficiency of the proposed control system in the presence of TCSC is shown through simulation results that show its superiority over the conventional control system. The simulation of the paper is carried out on the Four-Machine Two-Area test system and 10-machine, 39-bus New England power system. https://ieco.usb.ac.ir/article_6976_e161423581d69f9aaf76ce59c01c8e65.pdf