A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads
In this paper, a novel virtual negative inductor stabilizing strategy is proposed for the dc microgrid with constant power loads. It is known that in the dc-based power system, the constant power load will generate a virtual negative incremental resistance, which may deteriorate the whole system sta...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2018-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8485694/ |
| _version_ | 1818427584443056128 |
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| author | Sheng Liu Peng Su Lanyong Zhang |
| author_facet | Sheng Liu Peng Su Lanyong Zhang |
| author_sort | Sheng Liu |
| collection | DOAJ |
| description | In this paper, a novel virtual negative inductor stabilizing strategy is proposed for the dc microgrid with constant power loads. It is known that in the dc-based power system, the constant power load will generate a virtual negative incremental resistance, which may deteriorate the whole system stability. The situation will be more serious for the dc power system with a large line inductance. In the proposed stabilizing strategy, a virtual negative inductor is built on the source-side converter through the droop control method. The built virtual negative inductor counteracts the large line inductance, thus enhancing the system damping effect. Small-signal models of the studied dc microgrid system under the proposed stabilizing strategy are carefully derived. A root-locus-based parameter designing approach is proposed for obtaining the optimal parameter value for the stabilizer. An explicit Nyquist stability criterion for the studied dc microgrid system is proposed, with the system minor loop gain carefully derived. Several comparative stability analyses are taken for showing the system robustness to the parameter perturbations. Detailed numerical simulations are also conducted for validating the effectiveness of the proposed stabilizing strategy. |
| first_indexed | 2024-12-14T14:48:03Z |
| format | Article |
| id | doaj.art-3a08604c08584f17b693f24975ccd3ef |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T14:48:03Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-3a08604c08584f17b693f24975ccd3ef2022-12-21T22:57:14ZengIEEEIEEE Access2169-35362018-01-016597285974110.1109/ACCESS.2018.28742018485694A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power LoadsSheng Liu0Peng Su1https://orcid.org/0000-0002-6652-7142Lanyong Zhang2https://orcid.org/0000-0002-2683-2732College of Automation, Harbin Engineering University, Harbin, ChinaCollege of Automation, Harbin Engineering University, Harbin, ChinaCollege of Automation, Harbin Engineering University, Harbin, ChinaIn this paper, a novel virtual negative inductor stabilizing strategy is proposed for the dc microgrid with constant power loads. It is known that in the dc-based power system, the constant power load will generate a virtual negative incremental resistance, which may deteriorate the whole system stability. The situation will be more serious for the dc power system with a large line inductance. In the proposed stabilizing strategy, a virtual negative inductor is built on the source-side converter through the droop control method. The built virtual negative inductor counteracts the large line inductance, thus enhancing the system damping effect. Small-signal models of the studied dc microgrid system under the proposed stabilizing strategy are carefully derived. A root-locus-based parameter designing approach is proposed for obtaining the optimal parameter value for the stabilizer. An explicit Nyquist stability criterion for the studied dc microgrid system is proposed, with the system minor loop gain carefully derived. Several comparative stability analyses are taken for showing the system robustness to the parameter perturbations. Detailed numerical simulations are also conducted for validating the effectiveness of the proposed stabilizing strategy.https://ieeexplore.ieee.org/document/8485694/DC microgridsystem stabilityactive dampingvirtual impedancedroop controlvirtual negative inductor |
| spellingShingle | Sheng Liu Peng Su Lanyong Zhang A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads IEEE Access DC microgrid system stability active damping virtual impedance droop control virtual negative inductor |
| title | A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads |
| title_full | A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads |
| title_fullStr | A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads |
| title_full_unstemmed | A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads |
| title_short | A Virtual Negative Inductor Stabilizing Strategy for DC Microgrid With Constant Power Loads |
| title_sort | virtual negative inductor stabilizing strategy for dc microgrid with constant power loads |
| topic | DC microgrid system stability active damping virtual impedance droop control virtual negative inductor |
| url | https://ieeexplore.ieee.org/document/8485694/ |
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