Research on influencing factors and improving methods for DC distribution system stability
In this paper, the Nyquist admittance ratio criterion was used to analyse the influencing factors on the stability of the system, such as the parameters of DC line, the intensity of interconnected AC power grid, the droop coefficient and etc. The theoretical analysis showed that the increase of the...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-04-01
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| Series: | The Journal of Engineering |
| Subjects: | |
| Online Access: | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8557 |
| _version_ | 1818458133416116224 |
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| author | Xueshen Zhao Ke Peng Xinhui Zhang Jinsong Liu Yanlei Zhao Jiajia Chen |
| author_facet | Xueshen Zhao Ke Peng Xinhui Zhang Jinsong Liu Yanlei Zhao Jiajia Chen |
| author_sort | Xueshen Zhao |
| collection | DOAJ |
| description | In this paper, the Nyquist admittance ratio criterion was used to analyse the influencing factors on the stability of the system, such as the parameters of DC line, the intensity of interconnected AC power grid, the droop coefficient and etc. The theoretical analysis showed that the increase of the DC line resistance would decrease the system stability margin, while the increase of the DC line inductance had small effect on the system stability margin; the weaker the gird intensity was, the smaller the system stability margin was, while the larger the droop coefficient was, the larger the system stability margin was. In the case that AC and DC line parameters were the same, the system stability margin under U(dc)-I(dc) droop control mode was larger than that under U(dc)-P droop control mode. According to these influencing factors, suggestions were given to improve system damping and system stability through reducing the impedance of DC line, enhancing the interconnection of AC power grid and optimising the droop coefficient. Finally, a detailed simulation model was built with DIgSILENT simulation tool to verify the correctness of the above theoretical analysis by time-domain simulation results. |
| first_indexed | 2024-12-14T22:53:37Z |
| format | Article |
| id | doaj.art-6c246d71cf6149baafad3cfe0eef0366 |
| institution | Directory Open Access Journal |
| issn | 2051-3305 |
| language | English |
| last_indexed | 2024-12-14T22:53:37Z |
| publishDate | 2019-04-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Journal of Engineering |
| spelling | doaj.art-6c246d71cf6149baafad3cfe0eef03662022-12-21T22:44:38ZengWileyThe Journal of Engineering2051-33052019-04-0110.1049/joe.2018.8557JOE.2018.8557Research on influencing factors and improving methods for DC distribution system stabilityXueshen Zhao0Ke Peng1Xinhui Zhang2Jinsong Liu3Yanlei Zhao4Jiajia Chen5School of Electrical and Electronic Engineering, Shandong University of TechnologySchool of Electrical and Electronic Engineering, Shandong University of TechnologySchool of Electrical and Electronic Engineering, Shandong University of TechnologyElectric Power Research Institute, State Grid Shanghai Municipal Electric Power CompanySchool of Electrical and Electronic Engineering, Shandong University of TechnologySchool of Electrical and Electronic Engineering, Shandong University of TechnologyIn this paper, the Nyquist admittance ratio criterion was used to analyse the influencing factors on the stability of the system, such as the parameters of DC line, the intensity of interconnected AC power grid, the droop coefficient and etc. The theoretical analysis showed that the increase of the DC line resistance would decrease the system stability margin, while the increase of the DC line inductance had small effect on the system stability margin; the weaker the gird intensity was, the smaller the system stability margin was, while the larger the droop coefficient was, the larger the system stability margin was. In the case that AC and DC line parameters were the same, the system stability margin under U(dc)-I(dc) droop control mode was larger than that under U(dc)-P droop control mode. According to these influencing factors, suggestions were given to improve system damping and system stability through reducing the impedance of DC line, enhancing the interconnection of AC power grid and optimising the droop coefficient. Finally, a detailed simulation model was built with DIgSILENT simulation tool to verify the correctness of the above theoretical analysis by time-domain simulation results.https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8557dampingpower distribution controlpower gridsdistributed power generationpower system stabilitytime-domain analysisvoltage controlpower system interconnectionDIgSILENT simulation tooldroop control modeDC line inductancesystem stability marginDC line resistancedroop coefficientsmall-signal stabilitydynamic admittance-based droop control modelDC distribution system stabilityinfluencing factors |
| spellingShingle | Xueshen Zhao Ke Peng Xinhui Zhang Jinsong Liu Yanlei Zhao Jiajia Chen Research on influencing factors and improving methods for DC distribution system stability The Journal of Engineering damping power distribution control power grids distributed power generation power system stability time-domain analysis voltage control power system interconnection DIgSILENT simulation tool droop control mode DC line inductance system stability margin DC line resistance droop coefficient small-signal stability dynamic admittance-based droop control model DC distribution system stability influencing factors |
| title | Research on influencing factors and improving methods for DC distribution system stability |
| title_full | Research on influencing factors and improving methods for DC distribution system stability |
| title_fullStr | Research on influencing factors and improving methods for DC distribution system stability |
| title_full_unstemmed | Research on influencing factors and improving methods for DC distribution system stability |
| title_short | Research on influencing factors and improving methods for DC distribution system stability |
| title_sort | research on influencing factors and improving methods for dc distribution system stability |
| topic | damping power distribution control power grids distributed power generation power system stability time-domain analysis voltage control power system interconnection DIgSILENT simulation tool droop control mode DC line inductance system stability margin DC line resistance droop coefficient small-signal stability dynamic admittance-based droop control model DC distribution system stability influencing factors |
| url | https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8557 |
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