Liu, MuyangMuyangLiuDassios, Ioannis K.Ioannis K.DassiosTzounas, GeorgiosGeorgiosTzounasMilano, FedericoFedericoMilano2018-09-112018-09-112018 IEEE2019-01IEEE Transactions on Power Systems0885-8950http://hdl.handle.net/10197/9469The paper studies the impact of realistic WideArea Measurement System (WAMS) time-varying delays on the dynamic behaviour of power systems. A detailed model of WAMS delays including pseudo-periodic, stochastic and constant components is presented. Then, the paper discusses numerical methods to evaluate the small-signal stability as well as the timedomain simulation of power systems with inclusion of such delays. The small-signal stability analysis is shown to be able to capture the dominant modes through the combination of a characteristic matrix approximation and a Newton correction technique. A case study based on the IEEE 14-bus system compares the accuracy of the small-signal stability analysis with Monte-Carlo time-domain simulations. Finally, the numerical efficiency of the proposed technique is tested through a real-world dynamic model of the all-island Irish system.en© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Time-varying delayDelay differential algebraic equations (DDAEs)Small-signal stabilityWide-area measurement system (WAMS)Journal Article34162763610.1109/TPWRS.2018.28655592018-08-13SFI/15/IA/3074SFI/15/spp/e3125https://creativecommons.org/licenses/by-nc-nd/3.0/ie/