An estimation-based solution to weak-grid-induced small-signal stability problems of power converters

The large-scale deployment of grid-tied power electronic converters in renewable generation, electric motor drives, and energy storage systems speeds up the global energy transition. However, the stability problems faced by power converters in weak grids, which feature large and variable grid impeda...

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Main Authors: Fang, Jingyang, Yu, Jiale, Zhang, Yifu, Goetz, Stefan M.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/159933
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1599332022-07-06T02:02:11Z An estimation-based solution to weak-grid-induced small-signal stability problems of power converters Fang, Jingyang Yu, Jiale Zhang, Yifu Goetz, Stefan M. School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Estimation Kalman Filters The large-scale deployment of grid-tied power electronic converters in renewable generation, electric motor drives, and energy storage systems speeds up the global energy transition. However, the stability problems faced by power converters in weak grids, which feature large and variable grid impedances, stand as a serious challenge that has puzzled the power electronic community for more than 15 years. Existing solutions to weak-grid-induced small-signal stability problems modify system and/or control parameters so that stable operation is achieved under a certain condition. However, such solutions are problem and application-specific. Therefore, the solutions can hardly be generalized to various operating conditions or stability problems. As such, this article proposes an estimation-based solution that targets multiple weak-grid-induced small-signal stability problems, particularly for converters with grid-supportive services. The essence of the proposed solution lies in the accurate estimation of real grid information rather than the point-of-common-coupling information. For implementation, Kalman filters serve as an estimator. Subsequently, the estimated information is used to design controllers, such as voltage droop, that allow for stable power conversion. Finally, simulation and experimental results validate the effectiveness and generality of the proposed solution. This work was supported in part by the National Science Foundation under Grant 1608929 and in part by the Duke Energy Research Seed Fund. 2022-07-06T02:02:11Z 2022-07-06T02:02:11Z 2020 Journal Article Fang, J., Yu, J., Zhang, Y. & Goetz, S. M. (2020). An estimation-based solution to weak-grid-induced small-signal stability problems of power converters. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(4), 4558-4572. https://dx.doi.org/10.1109/JESTPE.2020.3030720 2168-6777 https://hdl.handle.net/10356/159933 10.1109/JESTPE.2020.3030720 2-s2.0-85103782376 4 9 4558 4572 en IEEE Journal of Emerging and Selected Topics in Power Electronics © 2020 IEEE. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Estimation
Kalman Filters
spellingShingle Engineering::Electrical and electronic engineering
Estimation
Kalman Filters
Fang, Jingyang
Yu, Jiale
Zhang, Yifu
Goetz, Stefan M.
An estimation-based solution to weak-grid-induced small-signal stability problems of power converters
description The large-scale deployment of grid-tied power electronic converters in renewable generation, electric motor drives, and energy storage systems speeds up the global energy transition. However, the stability problems faced by power converters in weak grids, which feature large and variable grid impedances, stand as a serious challenge that has puzzled the power electronic community for more than 15 years. Existing solutions to weak-grid-induced small-signal stability problems modify system and/or control parameters so that stable operation is achieved under a certain condition. However, such solutions are problem and application-specific. Therefore, the solutions can hardly be generalized to various operating conditions or stability problems. As such, this article proposes an estimation-based solution that targets multiple weak-grid-induced small-signal stability problems, particularly for converters with grid-supportive services. The essence of the proposed solution lies in the accurate estimation of real grid information rather than the point-of-common-coupling information. For implementation, Kalman filters serve as an estimator. Subsequently, the estimated information is used to design controllers, such as voltage droop, that allow for stable power conversion. Finally, simulation and experimental results validate the effectiveness and generality of the proposed solution.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Fang, Jingyang
Yu, Jiale
Zhang, Yifu
Goetz, Stefan M.
format Article
author Fang, Jingyang
Yu, Jiale
Zhang, Yifu
Goetz, Stefan M.
author_sort Fang, Jingyang
title An estimation-based solution to weak-grid-induced small-signal stability problems of power converters
title_short An estimation-based solution to weak-grid-induced small-signal stability problems of power converters
title_full An estimation-based solution to weak-grid-induced small-signal stability problems of power converters
title_fullStr An estimation-based solution to weak-grid-induced small-signal stability problems of power converters
title_full_unstemmed An estimation-based solution to weak-grid-induced small-signal stability problems of power converters
title_sort estimation-based solution to weak-grid-induced small-signal stability problems of power converters
publishDate 2022
url https://hdl.handle.net/10356/159933
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