TY - JOUR ID - 1224 TI - Evaluation of Delays-based Stability of LFC Systems in the Presence of Electric ā€ˇVehicles Aggregator JO - Journal of Operation and Automation in Power Engineering JA - JOAPE LA - en SN - 2322-4576 AU - Babaei, F. AU - Safari, A. AU - Salehi, J. AD - Department of Electrical Engineering, Azarbaijan Shahid Madani University, Tabriz, Iran Y1 - 2022 PY - 2022 VL - 10 IS - 2 SP - 165 EP - 174 KW - Time-varying delay KW - Lyapunov-Krasovskii theory KW - LMI KW - Load frequency control KW - Electric Vehicles Aggregator DO - 10.22098/joape.2022.9042.1626 N2 - In the integrated electrical systems, frequency control service considering the electric vehicle (EV) aggregators could lead to time-varying delay in load frequency control (LFC) schemes. These delays influence the LFC system efficiency, and in some situations, the lack of a clear choice of a control strategy considering the time-varying delays causes power system instability. Thus, this paper illustrates different time-varying delays based on the stability of an LFC system in the EV aggregators presence. The LFC's delay-dependent stability study is executed for finding the stability region and, stability criteria is suggested using the linear matrix inequality (LMI) method and Lyapunov-Krasovskii theory. Also, Wirtinger-based improved inequality and bounding lemma are applied to compute the greatest allowable delay in the LFC system, including the EV aggregators. UR - https://joape.uma.ac.ir/article_1224.html L1 - https://joape.uma.ac.ir/article_1224_9376e58d9fdf4e4aadf3a1d448c3716f.pdf ER -