Synchronizing Torque Impacts on Rotor Speed in Power Systems

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Title: Synchronizing Torque Impacts on Rotor Speed in Power Systems
Authors: Bakhtvar, Mostafa
Vittal, Eknath
Zheng, Kuan
Keane, Andrew
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Date: 2016
Abstract: Renewables 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.
Funding Details: Science Foundation Ireland
Type of material: Journal Article
Publisher: IEEE
Copyright (published version): 2016 IEEE
Keywords: Operation;Frequency;Reactive power;Synchronizing torque;Wind generation;Rate of change of frequency
DOI: 10.1109/TPWRS.2016.2600478
Language: en
Status of Item: Peer reviewed
Appears in Collections:ERC Research Collection
Electrical and Electronic Engineering Research Collection
Energy Institute Research Collection

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