Bakhtvar, MostafaMostafaBakhtvarVittal, EknathEknathVittalZheng, KuanKuanZhengKeane, AndrewAndrewKeane2016-09-232016-09-232016 IEEE2016IEEE Transactions on Power Systemshttp://hdl.handle.net/10197/7987Renewables are increasingly replacing power from conventional generators. Renewable power injected through power electronic converters lacks the fundamental electric torque components. Electric torque components have an important role in determining the behavior of conventional machines in the network. The influence of this factor becomes more notable in power systems with reduced inertia. Hence, questions arise on, how can synchronizing torque basically contribute to the rotor speed deviation and eventually the system frequency and if there is a potential for using the steady state synchronizing torque coefficient (STC) to achieve acceptable frequency operating points. This paper calculates the steady state STC matrix by using the multi-machine Heffron-Philips model in conjunction with the network admitance matrix. Accordingly, it investigates the impact of the generator location and reactive power output on the STC matrix. It demonstrates how this impact manifests in the generator rotor speed deviation. Eventually, the significance of the STC from the system frequency perspective is assessed.en© © 2016 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.OperationFrequencyReactive powerSynchronizing torqueWind generationRate of change of frequencyJournal Article3231927193510.1109/TPWRS.2016.26004782016-09-21https://creativecommons.org/licenses/by-nc-nd/3.0/ie/