Frequency dynamics during high CCGT and wind penetrations

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Title: Frequency dynamics during high CCGT and wind penetrations
Authors: Meegahapola, Lasantha
Flynn, Damian
Permanent link: http://hdl.handle.net/10197/3553
Date: 2011
Abstract: Frequency stability is the paramount concern for secure and reliable operation of a power system. High wind penetration levels are reported in power systems with high thermal generation, and hence its likely to result high wind and combined-cycle gas turbine (CCGT) penetrations during system operation since CCGTs are the most preferable choice for the thermal generation. The doubly-fed induction generators (DFIGs) do not provide any inertial response while the CCGTs have unique frequency response during the system frequency disturbances. Therefore, CCGT turbine response characteristics and the zero inertial response may influence on frequency dynamics of a power network. The main objective of this study is to analyze the frequency dynamics during generator outages and three-phase short-circuit faults in a power network with high CCGT and wind penetrations. A test network model was developed based on the Northern-Ireland network in DIgSILENT Power Factory software package. It has shown that frequency stability may be threatened when three-phase short circuit faults occur in power networks during high CCGT and wind penetrations which may lead to CCGT combustor lean-blowout and ultimately results large frequency excursions in the network.
Funding Details: Science Foundation Ireland
Other funder
Type of material: Conference Publication
Publisher: IEEE
Copyright (published version): 2011 IEEE
Keywords: CCGT;DFIG;Frequency nadir;Frequency stability;Lean blowout;ROCOF
Subject LCSH: Combined cycle power plants
Induction generators
Gas-turbines
Electric power system stability
Language: en
Status of Item: Peer reviewed
Is part of: 2011 21st Australasian Universities Power Engineering Conference (AUPEC) [proceedings]
Conference Details: Presented at AUPEC 2011, Australasian Universities Power Engineering Conference, Brisbane, Australia, 25 - 28 September 2011
Appears in Collections:ERC Research Collection
Electrical and Electronic Engineering Research Collection

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