Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system
Due to the fixed rotor speed and insufficient inertia of conventional DC synchronous condenser (SCs), the high inertia energy storage synchronous condenser (HIESSC) is considered as a promising solution for providing both voltage and frequency support for the grid. However, as a new synchronous cond...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-08-01
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| Series: | International Journal of Electrical Power & Energy Systems |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142061525003497 |
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| author | Sheng Gong Jun Yao Xue Chen Yuheng Yang Zhihui Wang |
| author_facet | Sheng Gong Jun Yao Xue Chen Yuheng Yang Zhihui Wang |
| author_sort | Sheng Gong |
| collection | DOAJ |
| description | Due to the fixed rotor speed and insufficient inertia of conventional DC synchronous condenser (SCs), the high inertia energy storage synchronous condenser (HIESSC) is considered as a promising solution for providing both voltage and frequency support for the grid. However, as a new synchronous condenser, the HIESSC may suffer sub-synchronous oscillations (SSO) because of the interaction between the HIESSC and weak grid. Moreover, there are limited literatures addressing the analysis of internal sub-synchronous interaction within the system. For this issue, the sub-synchronous interaction and damping characteristics of the weak grid-connected HIESSC system are investigated in this article. Firstly, a complete closed-loop transfer function block diagram of the system is developed. Then, in the phase-locked loop (PLL)-dominated SSO mode, the damping paths of the system and dynamic interaction processes in the HIESSC grid-connected system are analyzed. On this basis, the damping contribution of HIESSC and sub-synchronous interaction are evaluated quantitatively by drawing on equivalent damping coefficients in damping torque analysis (DTA). Finally, the effectiveness of the theoretical analysis is validated by simulations and experiments. |
| format | Article |
| id | doaj-art-7e50504cadfe43a89065de2ecf329bcc |
| institution | OA Journals |
| issn | 0142-0615 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Electrical Power & Energy Systems |
| spelling | doaj-art-7e50504cadfe43a89065de2ecf329bcc2025-08-20T02:36:12ZengElsevierInternational Journal of Electrical Power & Energy Systems0142-06152025-08-0116911080110.1016/j.ijepes.2025.110801Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser systemSheng Gong0Jun Yao1Xue Chen2Yuheng Yang3Zhihui Wang4State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaCorresponding author.; State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, ChinaDue to the fixed rotor speed and insufficient inertia of conventional DC synchronous condenser (SCs), the high inertia energy storage synchronous condenser (HIESSC) is considered as a promising solution for providing both voltage and frequency support for the grid. However, as a new synchronous condenser, the HIESSC may suffer sub-synchronous oscillations (SSO) because of the interaction between the HIESSC and weak grid. Moreover, there are limited literatures addressing the analysis of internal sub-synchronous interaction within the system. For this issue, the sub-synchronous interaction and damping characteristics of the weak grid-connected HIESSC system are investigated in this article. Firstly, a complete closed-loop transfer function block diagram of the system is developed. Then, in the phase-locked loop (PLL)-dominated SSO mode, the damping paths of the system and dynamic interaction processes in the HIESSC grid-connected system are analyzed. On this basis, the damping contribution of HIESSC and sub-synchronous interaction are evaluated quantitatively by drawing on equivalent damping coefficients in damping torque analysis (DTA). Finally, the effectiveness of the theoretical analysis is validated by simulations and experiments.http://www.sciencedirect.com/science/article/pii/S0142061525003497High inertia energy storage synchronous condenser (HIESSC)Sub-synchronous interactionPhase-locked loop (PLL)Damping characteristicsDamping torque analysis (DTA) |
| spellingShingle | Sheng Gong Jun Yao Xue Chen Yuheng Yang Zhihui Wang Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system International Journal of Electrical Power & Energy Systems High inertia energy storage synchronous condenser (HIESSC) Sub-synchronous interaction Phase-locked loop (PLL) Damping characteristics Damping torque analysis (DTA) |
| title | Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system |
| title_full | Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system |
| title_fullStr | Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system |
| title_full_unstemmed | Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system |
| title_short | Analysis of sub-synchronous interaction and damping characteristics of weak grid-connected high inertia energy storage synchronous condenser system |
| title_sort | analysis of sub synchronous interaction and damping characteristics of weak grid connected high inertia energy storage synchronous condenser system |
| topic | High inertia energy storage synchronous condenser (HIESSC) Sub-synchronous interaction Phase-locked loop (PLL) Damping characteristics Damping torque analysis (DTA) |
| url | http://www.sciencedirect.com/science/article/pii/S0142061525003497 |
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