Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm
With the access of high-density distributed power generation, the inertia level of power grid continues to decline. Especially under the condition of independent power supply of new energy, the inertia level of power grid is far lower than the minimum inertia demand. By applying the virtual DC motor...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2023-01-01
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| Series: | 电力工程技术 |
| Subjects: | |
| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/220331433 |
| _version_ | 1797937901976158208 |
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| author | WANG Shuzheng ZHANG Shaowen ZHU Haiming LI Xianyun |
| author_facet | WANG Shuzheng ZHANG Shaowen ZHU Haiming LI Xianyun |
| author_sort | WANG Shuzheng |
| collection | DOAJ |
| description | With the access of high-density distributed power generation, the inertia level of power grid continues to decline. Especially under the condition of independent power supply of new energy, the inertia level of power grid is far lower than the minimum inertia demand. By applying the virtual DC motor control strategy to the port converter, the system inertia can be flexibly adjusted by using the control parameters to reduce the inertia difference of the power grid and enhance the stability of the power grid. However, the magnitude of the virtual equivalent inertia of the control method is not clear, and the influence of the virtual inertia on the equivalent inertia needs to be further explored. Therefore, based on the virtual DC motor model, the small signal model is used to analyze the influence of virtual inertia and equivalent inertia on the dynamic characteristics of the system, and the equivalent relationship between them is pointed out. Secondly, based on the corresponding relationship between the virtual inertia and the equivalent inertia, an equivalent inertia calculation method which uses the voltage curve similarity measured by Frecher algorithm is proposed to determine the equivalent inertia of the virtual DC motor control. Then, the correlation constraint and curve feature constraint are introduced, and an improved Frecher algorithm is proposed to ensure the correctness of the equivalent inertia calculation. Finally, the optimal fitting method is used to realize the function of the equivalent inertia relationship, and the quantitative relationship between the virtual inertia and the equivalent inertia is given. The simulation results verify the effectiveness of the proposed equivalent inertia calculation method. |
| first_indexed | 2024-04-10T18:51:27Z |
| format | Article |
| id | doaj.art-6708fdaf8c874f1eba0e2073c3796c8c |
| institution | Directory Open Access Journal |
| issn | 2096-3203 |
| language | zho |
| last_indexed | 2024-04-10T18:51:27Z |
| publishDate | 2023-01-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj.art-6708fdaf8c874f1eba0e2073c3796c8c2023-02-01T07:22:44ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032023-01-0142121822510.12158/j.2096-3203.2023.01.026220331433Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithmWANG Shuzheng0ZHANG Shaowen1ZHU Haiming2LI Xianyun3School of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, ChinaSchool of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, ChinaSchool of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, ChinaSchool of Electric Power Engineering, Nanjing Institute of Technology, Nanjing 211167, ChinaWith the access of high-density distributed power generation, the inertia level of power grid continues to decline. Especially under the condition of independent power supply of new energy, the inertia level of power grid is far lower than the minimum inertia demand. By applying the virtual DC motor control strategy to the port converter, the system inertia can be flexibly adjusted by using the control parameters to reduce the inertia difference of the power grid and enhance the stability of the power grid. However, the magnitude of the virtual equivalent inertia of the control method is not clear, and the influence of the virtual inertia on the equivalent inertia needs to be further explored. Therefore, based on the virtual DC motor model, the small signal model is used to analyze the influence of virtual inertia and equivalent inertia on the dynamic characteristics of the system, and the equivalent relationship between them is pointed out. Secondly, based on the corresponding relationship between the virtual inertia and the equivalent inertia, an equivalent inertia calculation method which uses the voltage curve similarity measured by Frecher algorithm is proposed to determine the equivalent inertia of the virtual DC motor control. Then, the correlation constraint and curve feature constraint are introduced, and an improved Frecher algorithm is proposed to ensure the correctness of the equivalent inertia calculation. Finally, the optimal fitting method is used to realize the function of the equivalent inertia relationship, and the quantitative relationship between the virtual inertia and the equivalent inertia is given. The simulation results verify the effectiveness of the proposed equivalent inertia calculation method.https://www.epet-info.com/dlgcjsen/article/abstract/220331433virtual dc motorcorrelation constraintcurve characteristic constraintequivalent relation of inertiafrecher algorithmoptimal fitting method |
| spellingShingle | WANG Shuzheng ZHANG Shaowen ZHU Haiming LI Xianyun Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm 电力工程技术 virtual dc motor correlation constraint curve characteristic constraint equivalent relation of inertia frecher algorithm optimal fitting method |
| title | Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm |
| title_full | Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm |
| title_fullStr | Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm |
| title_full_unstemmed | Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm |
| title_short | Equivalent inertia calculation of virtual DC motor based on improved Frecher algorithm |
| title_sort | equivalent inertia calculation of virtual dc motor based on improved frecher algorithm |
| topic | virtual dc motor correlation constraint curve characteristic constraint equivalent relation of inertia frecher algorithm optimal fitting method |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/220331433 |
| work_keys_str_mv | AT wangshuzheng equivalentinertiacalculationofvirtualdcmotorbasedonimprovedfrecheralgorithm AT zhangshaowen equivalentinertiacalculationofvirtualdcmotorbasedonimprovedfrecheralgorithm AT zhuhaiming equivalentinertiacalculationofvirtualdcmotorbasedonimprovedfrecheralgorithm AT lixianyun equivalentinertiacalculationofvirtualdcmotorbasedonimprovedfrecheralgorithm |