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Design and Control of Virtual Synchronous Machine Based Energy Systems / MUFTAU BARUWA

Swansea University Author: MUFTAU BARUWA

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DOI (Published version): 10.23889/SUthesis.58463

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Conventionally, the operation and stability of power systems have been governed by the dynamics of large synchronous generators (SGs) which provide the inertial support required to maintain the resilience and stability of the power system. How-ever, the commitment of the UK to drive a zero-carbon ec...

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Published: Swansea 2021
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Fazeli, Meghdad; Egwebe, Augustine
URI: https://cronfa.swan.ac.uk/Record/cronfa58463
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first_indexed 2021-10-26T15:25:10Z
last_indexed 2021-10-27T03:23:57Z
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spelling 2021-10-26T18:23:12.1731352 v2 58463 2021-10-26 Design and Control of Virtual Synchronous Machine Based Energy Systems 5aba0d15289bfb919d74e37f1b7b5e2a MUFTAU BARUWA MUFTAU BARUWA true false 2021-10-26 Conventionally, the operation and stability of power systems have been governed by the dynamics of large synchronous generators (SGs) which provide the inertial support required to maintain the resilience and stability of the power system. How-ever, the commitment of the UK to drive a zero-carbon economy is accelerating the integration of renewable energy sources (RESs) into the power system. Since the dynamics and operation of RESs differs from SGs, the large-scale integration of RESs will significantly impact the control and stability of the power system.This thesis focuses on the design of grid-friendly control algorithms termed virtual synchronous machines (VSMs), which mimic the desirable characteristics of SGs. Although several VSM topologies have been proposed in literature, most of them require further modifications before they can be integrated into the grid. Hence, a novel VSM algorithm for permanent magnet synchronous generator based wind turbines has been proposed in this thesis.The proposed VSM performs seamlessly in all operating modes and enables maxi-mum power point tracking in grid-connected operation (assuming strong grid), load following power generation in islanded mode and fault ride-through during faults. To ensure optimal performance of the VSM in all operating modes, a comprehensive stability analysis of the VSM was performed in the event of small and large per-turbations. The result of the analysis was used to establish design guidelines and operational limits of the VSM.This thesis further evaluates the impact of VSMs on the power systems low-frequency oscillations (LFOs). A detailed two-machine test-bed was developed to analyze the LFOs which exists when VSMs replace SGs. The characteristics of the LFO modes and the dominant states was comprehensively analyzed. The LFO modes which exists in an all-VSM grid was also analyzed. Further, the role of the power system stabilizers in an all-VSM grid was comprehensively evaluated. An IEEE benchmark two-area four-machine system was employed to validate the results of the small-signal analysis.The analysis and time-domain simulations in this thesis were performed in the MAT-LAB/SIMULINK environment. E-Thesis Swansea Virtual Synchronous Machine, Microgrid, Power system control, Permanent Magnet synchronous generator, Low-frequency Oscillation, small-signal analysis, state space analysis, Synchronous Generator 26 10 2021 2021-10-26 10.23889/SUthesis.58463 A selection of third party content is redacted or is partially redacted from this thesis due to copyright restrictions.ORCiD identifier https://orcid.org/0000-0001-6441-696X COLLEGE NANME COLLEGE CODE Swansea University Fazeli, Meghdad; Egwebe, Augustine Doctoral Ph.D 2021-10-26T18:23:12.1731352 2021-10-26T16:21:04.5947253 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised MUFTAU BARUWA 1 58463__21307__853a19c1ebce4ab7a63fef02b75eebfc.pdf Baruwa_Muftau_O_PhD_Thesis_Final_Redacted.pdf 2021-10-26T16:48:31.5883109 Output 22054944 application/pdf Redacted version - open access true Copyright: The author, Muftau Olatunji Baruwa, 2021. true eng
title Design and Control of Virtual Synchronous Machine Based Energy Systems
spellingShingle Design and Control of Virtual Synchronous Machine Based Energy Systems
MUFTAU BARUWA
title_short Design and Control of Virtual Synchronous Machine Based Energy Systems
title_full Design and Control of Virtual Synchronous Machine Based Energy Systems
title_fullStr Design and Control of Virtual Synchronous Machine Based Energy Systems
title_full_unstemmed Design and Control of Virtual Synchronous Machine Based Energy Systems
title_sort Design and Control of Virtual Synchronous Machine Based Energy Systems
author_id_str_mv 5aba0d15289bfb919d74e37f1b7b5e2a
author_id_fullname_str_mv 5aba0d15289bfb919d74e37f1b7b5e2a_***_MUFTAU BARUWA
author MUFTAU BARUWA
author2 MUFTAU BARUWA
format E-Thesis
publishDate 2021
institution Swansea University
doi_str_mv 10.23889/SUthesis.58463
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
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description Conventionally, the operation and stability of power systems have been governed by the dynamics of large synchronous generators (SGs) which provide the inertial support required to maintain the resilience and stability of the power system. How-ever, the commitment of the UK to drive a zero-carbon economy is accelerating the integration of renewable energy sources (RESs) into the power system. Since the dynamics and operation of RESs differs from SGs, the large-scale integration of RESs will significantly impact the control and stability of the power system.This thesis focuses on the design of grid-friendly control algorithms termed virtual synchronous machines (VSMs), which mimic the desirable characteristics of SGs. Although several VSM topologies have been proposed in literature, most of them require further modifications before they can be integrated into the grid. Hence, a novel VSM algorithm for permanent magnet synchronous generator based wind turbines has been proposed in this thesis.The proposed VSM performs seamlessly in all operating modes and enables maxi-mum power point tracking in grid-connected operation (assuming strong grid), load following power generation in islanded mode and fault ride-through during faults. To ensure optimal performance of the VSM in all operating modes, a comprehensive stability analysis of the VSM was performed in the event of small and large per-turbations. The result of the analysis was used to establish design guidelines and operational limits of the VSM.This thesis further evaluates the impact of VSMs on the power systems low-frequency oscillations (LFOs). A detailed two-machine test-bed was developed to analyze the LFOs which exists when VSMs replace SGs. The characteristics of the LFO modes and the dominant states was comprehensively analyzed. The LFO modes which exists in an all-VSM grid was also analyzed. Further, the role of the power system stabilizers in an all-VSM grid was comprehensively evaluated. An IEEE benchmark two-area four-machine system was employed to validate the results of the small-signal analysis.The analysis and time-domain simulations in this thesis were performed in the MAT-LAB/SIMULINK environment.
published_date 2021-10-26T04:15:01Z
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score 11.01628

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