Network algebraization and port relationship for power‐electronic‐dominated power systems
Abstract In the classical differential‐algebraic equations (DAEs) framework for the traditional power system stability analysis, synchronous generators are depicted by differential equations and network by algebraic equations under the quasi‐steady‐state assumption. Differently, in the power‐electro...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2024-12-01
|
| Series: | IET Renewable Power Generation |
| Subjects: | |
| Online Access: | https://doi.org/10.1049/rpg2.13164 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850099146616209408 |
|---|---|
| author | Rui Ma Xiaowen Yang Meng Zhan |
| author_facet | Rui Ma Xiaowen Yang Meng Zhan |
| author_sort | Rui Ma |
| collection | DOAJ |
| description | Abstract In the classical differential‐algebraic equations (DAEs) framework for the traditional power system stability analysis, synchronous generators are depicted by differential equations and network by algebraic equations under the quasi‐steady‐state assumption. Differently, in the power‐electronic‐dominated power system (PEDPS), the dynamics of transmission lines of network for fully differential equations should be considered, due to the rapid response of converters' controls, for example, the alternating current controls. This poses a great challenge for the cognition, modeling, and analysis of the PEDPS. In this article, a nonlinear DAE model framework for the PEDPS is established with differential equations for the source nodes and algebraic equations for the dynamical electrical network, by generalizing the application scenarios of Kron reduction. The internal and terminal voltages of source nodes of converters are chosen as ports of nodes and network. Namely, the internal and terminal voltages of source nodes work as their output and input, respectively, whereas they work as the input and output of the algebraic network, respectively. The impact of dynamical network becomes clear, namely, it serves as a (linear) voltage divider and generates the terminal voltage based on the internal voltage of the sources simultaneously. By keeping only useful independent state variables, all differential equations for the transmission lines can be transferred to algebraic equations. With this simple model, the roles of both nodes and network become apparent, and it enhances the understanding of the PEDPS dynamics. On the other hand, broad simulations are conducted and compared to verify the proposed DAE framework for the PEDPS. As all independent variables have been kept in the model, it is found that they show the same computational accuracy, but better efficiency in computational time, compared to the electromagnetic‐transient simulation results. |
| format | Article |
| id | doaj-art-c7983a40368041eaa6f191f5df21dc51 |
| institution | DOAJ |
| issn | 1752-1416 1752-1424 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | IET Renewable Power Generation |
| spelling | doaj-art-c7983a40368041eaa6f191f5df21dc512025-08-20T02:40:32ZengWileyIET Renewable Power Generation1752-14161752-14242024-12-0118S14519452910.1049/rpg2.13164Network algebraization and port relationship for power‐electronic‐dominated power systemsRui Ma0Xiaowen Yang1Meng Zhan2Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education, School of Electrical Engineering Shandong University Jinan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan ChinaState Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan ChinaAbstract In the classical differential‐algebraic equations (DAEs) framework for the traditional power system stability analysis, synchronous generators are depicted by differential equations and network by algebraic equations under the quasi‐steady‐state assumption. Differently, in the power‐electronic‐dominated power system (PEDPS), the dynamics of transmission lines of network for fully differential equations should be considered, due to the rapid response of converters' controls, for example, the alternating current controls. This poses a great challenge for the cognition, modeling, and analysis of the PEDPS. In this article, a nonlinear DAE model framework for the PEDPS is established with differential equations for the source nodes and algebraic equations for the dynamical electrical network, by generalizing the application scenarios of Kron reduction. The internal and terminal voltages of source nodes of converters are chosen as ports of nodes and network. Namely, the internal and terminal voltages of source nodes work as their output and input, respectively, whereas they work as the input and output of the algebraic network, respectively. The impact of dynamical network becomes clear, namely, it serves as a (linear) voltage divider and generates the terminal voltage based on the internal voltage of the sources simultaneously. By keeping only useful independent state variables, all differential equations for the transmission lines can be transferred to algebraic equations. With this simple model, the roles of both nodes and network become apparent, and it enhances the understanding of the PEDPS dynamics. On the other hand, broad simulations are conducted and compared to verify the proposed DAE framework for the PEDPS. As all independent variables have been kept in the model, it is found that they show the same computational accuracy, but better efficiency in computational time, compared to the electromagnetic‐transient simulation results.https://doi.org/10.1049/rpg2.13164AC‐DC power convertorsdifferential algebraic equationsdifferential equationsintegrationpower system dynamic stabilityrenewable energy power conversion |
| spellingShingle | Rui Ma Xiaowen Yang Meng Zhan Network algebraization and port relationship for power‐electronic‐dominated power systems IET Renewable Power Generation AC‐DC power convertors differential algebraic equations differential equations integration power system dynamic stability renewable energy power conversion |
| title | Network algebraization and port relationship for power‐electronic‐dominated power systems |
| title_full | Network algebraization and port relationship for power‐electronic‐dominated power systems |
| title_fullStr | Network algebraization and port relationship for power‐electronic‐dominated power systems |
| title_full_unstemmed | Network algebraization and port relationship for power‐electronic‐dominated power systems |
| title_short | Network algebraization and port relationship for power‐electronic‐dominated power systems |
| title_sort | network algebraization and port relationship for power electronic dominated power systems |
| topic | AC‐DC power convertors differential algebraic equations differential equations integration power system dynamic stability renewable energy power conversion |
| url | https://doi.org/10.1049/rpg2.13164 |
| work_keys_str_mv | AT ruima networkalgebraizationandportrelationshipforpowerelectronicdominatedpowersystems AT xiaowenyang networkalgebraizationandportrelationshipforpowerelectronicdominatedpowersystems AT mengzhan networkalgebraizationandportrelationshipforpowerelectronicdominatedpowersystems |