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Book Cover
Author Adrees, Atia, author

Title Risk based assessment of subsynchronous resonance in AC/DC Systems / Atia Adrees
Published Switzerland : Springer Verlag, 2016


Description 1 online resource
Series Springer theses
Springer theses.
Contents Supervisor's Foreword; Parts of this thesis have been published in the following journal articles and conference proceedings:J. V. Milanovic and A. Adrees, "Identifying Generators at Risk of SSR in Meshed Compensated AC/DC Power Networks," IEEE Transactions on Power Systems, vol. 28, pp. 4438-4447, 2013.A. Adrees and J.V. Milanovic, "Methodology for Evaluation of Risk of Subsynchronous Resonance in Meshed Compensated Networks," IEEE Transactions on Power Systems, vol. 29, pp. 815-823, 2013.A. Adrees and J.V. Milanov; Acknowledgements; Contents; Symbols; Special Symbols; Subscripts
1 IntroductionAbstract; 1.1 Power System Stability; 1.1.1 Oscillations in Power System; 1.2 Subsynchronous Resonance; 1.2.1 Self Excitation; 1.2.2 Transient Torques Amplification; 1.3 Known Cases of Subsynchronous Resonance; 1.3.1 The Mohave Incidents; 1.3.2 Navajo Project; 1.3.3 HVDC Turbine Generator Interactions at Square Butte; 1.4 HVDC Transmission; 1.5 HVDC Technology; 1.5.1 LCC-HVDC; General Operation Principle; Control of HVDC Systems; Inherent Damping Characteristics of LCC-HVDC; 1.5.2 VSC-HVDC; General Topology and Operation Inherent Damping Characteristics of VSC-HVDC1.6 Past Research on Subsynchronous Resonance (SSR); 1.6.1 Analysis Methods; 1.6.2 Potential Sources of Subsynchronous Oscillations; Series Capacitor Compensation of Networks; Device Dependent Subsynchronous Oscillations; 1.6.3 Mitigation of SSR; Unit Tripping Mitigation Techniques; Non-unit Tripping SSR Mitigation Techniques; Mitigation Techniques for Torsional Interactions Due to HVDC Controllers; Mitigation Techniques for SSR Due to Shunt Compensators; Turbine Generator Model Shaft Fatigue1.6.3.7 VSC-HVDC; Uncertainty in Mechanical Parameters; 1.6.4 Summary of Past Research; 1.7 Research Aims and Objectives; 1.8 Main Contributions of This Research; 1.9 Thesis Overview; References; 2 Power System Modelling and SSR Analysis Methods; Abstract; 2.1 Synchronous Generators; 2.2 Modelling Power System Components; 2.2.1 Modelling Synchronous Generators; 2.2.2 Modelling Turbine Generator Mechanical System; 2.2.3 Generator Excitation Systems; Manual Excitation; Static Excitation (IEEE Type STIA); DC Excitation (IEEE Type DC1A)
2.2.4 Power System Stabilizers2.2.5 Transmission Lines; 2.2.6 Loads; 2.3 HVDC System Modelling; 2.3.1 LCC-HVDC Converters; 2.3.2 Converter Transformer Model; 2.3.3 LCC Converter Controls; 2.3.4 VSC-HVDC Converters; 2.3.5 VSC-HVDC Controls; Outer Control Loops; DC Voltage Control; AC Voltage Control; Active and Reactive Power Control; 2.3.6 VSC Control Structure; 2.4 Thyristor Controlled Series Capacitors (TCSCs); 2.5 SSR Analysis Methods; 2.5.1 Frequency Scanning Method; 2.5.2 Eigenvalue Analysis; 2.5.3 Electromagnetic Transients Simulations; 2.6 Comparison of SSR Analysis Methods
Summary This relevant and timely thesis presents the pioneering use of risk-based assessment tools to analyse the interaction between electrical and mechanical systems in mixed AC/DC power networks at subsynchronous frequencies. It also discusses assessing the effect of uncertainties in the mechanical parameters of a turbine generator on SSR in a meshed network with both symmetrical and asymmetrical compensation systems. The research presented has resulted in 12 publications including three top international journal papers (IEEE Transactions on Power Systems) and nine international conference publications, including two award-winning papers.
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Subject Electric power system stability -- Mathematical models
Electric power transmission -- Direct current.
Electric power transmission -- Alternating current.
Electric power system stability -- Mathematical models.
Electric power transmission -- Alternating current.
Electric power transmission -- Direct current.
Form Electronic book
ISBN 9783319449470