Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models
In recent years, a considerable effort has been made to minimise the size of DC-link capacitors in single-phase activefront-ends (SP-AFE), to reduce cost and to increase power density. As a result of the lower energy storage, a high-bandwidth outer DC voltage control loop is required to respond to f...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IEEE
2018
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| Online Access: | https://eprints.nottingham.ac.uk/49999/ |
| _version_ | 1848798126358396928 |
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| author | Salis, Valerio Costabeber, Alessando Cox, Stephen M. Formentini, Andrea Zanchetta, Pericle |
| author_facet | Salis, Valerio Costabeber, Alessando Cox, Stephen M. Formentini, Andrea Zanchetta, Pericle |
| author_sort | Salis, Valerio |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | In recent years, a considerable effort has been made to minimise the size of DC-link capacitors in single-phase activefront-ends (SP-AFE), to reduce cost and to increase power density. As a result of the lower energy storage, a high-bandwidth outer DC voltage control loop is required to respond to fast load changes. Linearised modelling is usually performed according to the power-balance method and the control is designed using LTI techniques. This is done assuming negligible voltage ripple at twice the grid frequency, and the model is considered valid up to the grid frequency. However, its precise validity limits are usually unknown and the control design becomes empirical when approaching these boundaries. To overcome this drawback, Linear Time Periodic (LTP) theory can be exploited, defining the range of validity of the LTI model and providing precise stability boundaries for the DC-link voltage loop. The main result is that LTP models more accurately describe the system behaviour and provide superior results compared to the LTI ones. Theoretical analysis, simulations and extensive experimental tests on a 10 kW converter are presented to validate the claims. |
| first_indexed | 2025-11-14T20:14:49Z |
| format | Article |
| id | nottingham-49999 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:14:49Z |
| publishDate | 2018 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-499992020-05-08T11:15:15Z https://eprints.nottingham.ac.uk/49999/ Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models Salis, Valerio Costabeber, Alessando Cox, Stephen M. Formentini, Andrea Zanchetta, Pericle In recent years, a considerable effort has been made to minimise the size of DC-link capacitors in single-phase activefront-ends (SP-AFE), to reduce cost and to increase power density. As a result of the lower energy storage, a high-bandwidth outer DC voltage control loop is required to respond to fast load changes. Linearised modelling is usually performed according to the power-balance method and the control is designed using LTI techniques. This is done assuming negligible voltage ripple at twice the grid frequency, and the model is considered valid up to the grid frequency. However, its precise validity limits are usually unknown and the control design becomes empirical when approaching these boundaries. To overcome this drawback, Linear Time Periodic (LTP) theory can be exploited, defining the range of validity of the LTI model and providing precise stability boundaries for the DC-link voltage loop. The main result is that LTP models more accurately describe the system behaviour and provide superior results compared to the LTI ones. Theoretical analysis, simulations and extensive experimental tests on a 10 kW converter are presented to validate the claims. IEEE 2018-02-28 Article PeerReviewed application/pdf en https://eprints.nottingham.ac.uk/49999/1/Stability%20Assessment%20of%20High-Bandwidth%20DC%20Voltage%20Controllers%20in.pdf Salis, Valerio, Costabeber, Alessando, Cox, Stephen M., Formentini, Andrea and Zanchetta, Pericle (2018) Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models. IEEE Journal of Emerging and Selected Topics in Power Electronics . ISSN 2168-6785 Linear Time Periodic Systems Harmonic State Space Model Stability Analysis Power Converters Active-Front-Ends http://ieeexplore.ieee.org/document/8304538/ doi:10.1109/JESTPE.2018.2810282 doi:10.1109/JESTPE.2018.2810282 |
| spellingShingle | Linear Time Periodic Systems Harmonic State Space Model Stability Analysis Power Converters Active-Front-Ends Salis, Valerio Costabeber, Alessando Cox, Stephen M. Formentini, Andrea Zanchetta, Pericle Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models |
| title | Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models |
| title_full | Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models |
| title_fullStr | Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models |
| title_full_unstemmed | Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models |
| title_short | Stability assessment of high-bandwidth DC voltage controllers in single-phase active-front-ends: LTI vs LTP models |
| title_sort | stability assessment of high-bandwidth dc voltage controllers in single-phase active-front-ends: lti vs ltp models |
| topic | Linear Time Periodic Systems Harmonic State Space Model Stability Analysis Power Converters Active-Front-Ends |
| url | https://eprints.nottingham.ac.uk/49999/ https://eprints.nottingham.ac.uk/49999/ https://eprints.nottingham.ac.uk/49999/ |