Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy
This paper presents a detailed and accurate small-signal analysis model for a four-terminal low-voltage direct current (LVDC) distribution network with distributed secondary control strategy. To tackle the contradiction between power sharing accuracy and average voltage recovery ability of voltage s...
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doaj-981fca5c77f647c8ae5338e09b67d48d2021-07-15T15:32:33ZengMDPI AGElectronics2079-92922021-06-01101575157510.3390/electronics10131575Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control StrategyZhenyu Lv0Min Zhou1Qi Wang2Wenqiang Hu3School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, ChinaSchool of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, ChinaSchool of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210023, ChinaSchool of Electrical Engineering, Southeast University, Nanjing 210096, ChinaThis paper presents a detailed and accurate small-signal analysis model for a four-terminal low-voltage direct current (LVDC) distribution network with distributed secondary control strategy. To tackle the contradiction between power sharing accuracy and average voltage recovery ability of voltage source converters (VSCs), a distributed secondary control strategy is adopted, which is based on average consensus algorithm and local voting protocol. Furthermore, to analyze the stability of LVDC distribution network based on the proposed distributed secondary control strategy, a detailed and accurate small-signal analysis model is formulated which is derived from various non-linear state-space sub-models. The time-domain simulation and electromagnetic simulation are carried out to verify the validity and accuracy of the proposed model. Based on this model, the influence rules of main eigenvalues are summarized with the variation of PI control and DC line parameters. Time-domain simulations conducted in PSCAD are used to validate the operational limits of the secondary controllers and DC line obtained from the small-signal stability analysis.https://www.mdpi.com/2079-9292/10/13/1575DC distribution networkconverter station controldistributed consensus algorithmpower distributionvoltage regulationstate-space model |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhenyu Lv Min Zhou Qi Wang Wenqiang Hu |
spellingShingle |
Zhenyu Lv Min Zhou Qi Wang Wenqiang Hu Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy Electronics DC distribution network converter station control distributed consensus algorithm power distribution voltage regulation state-space model |
author_facet |
Zhenyu Lv Min Zhou Qi Wang Wenqiang Hu |
author_sort |
Zhenyu Lv |
title |
Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy |
title_short |
Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy |
title_full |
Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy |
title_fullStr |
Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy |
title_full_unstemmed |
Small-Signal Stability Analysis for Multi-Terminal LVDC Distribution Network Based on Distributed Secondary Control Strategy |
title_sort |
small-signal stability analysis for multi-terminal lvdc distribution network based on distributed secondary control strategy |
publisher |
MDPI AG |
series |
Electronics |
issn |
2079-9292 |
publishDate |
2021-06-01 |
description |
This paper presents a detailed and accurate small-signal analysis model for a four-terminal low-voltage direct current (LVDC) distribution network with distributed secondary control strategy. To tackle the contradiction between power sharing accuracy and average voltage recovery ability of voltage source converters (VSCs), a distributed secondary control strategy is adopted, which is based on average consensus algorithm and local voting protocol. Furthermore, to analyze the stability of LVDC distribution network based on the proposed distributed secondary control strategy, a detailed and accurate small-signal analysis model is formulated which is derived from various non-linear state-space sub-models. The time-domain simulation and electromagnetic simulation are carried out to verify the validity and accuracy of the proposed model. Based on this model, the influence rules of main eigenvalues are summarized with the variation of PI control and DC line parameters. Time-domain simulations conducted in PSCAD are used to validate the operational limits of the secondary controllers and DC line obtained from the small-signal stability analysis. |
topic |
DC distribution network converter station control distributed consensus algorithm power distribution voltage regulation state-space model |
url |
https://www.mdpi.com/2079-9292/10/13/1575 |
work_keys_str_mv |
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_version_ |
1721299816459272192 |