Abstract
The Railway Energy Storage (ES) system, which absorbs regenerative braking energy (RBE) from the train and supplies energy to the train when needed, offers new insights into decarbonizing the electric railway energy system. However, the integration of ES depends on single-phase grid-connected converters, which will weaken the stability of the traction power supply system (TPSS) and may lead to harmonic instability issues. To address this challenge, this paper establishes a sequence impedance model for ES, which accurately characterizes its impedance features. Furthermore, based on the Generalized Nyquist Criterion (GNC), the influence of the number and the controller parameters of ES on system stability is discussed. Finally, the results show that the robustness against harmonic instability can be improved by adjusting the control parameters and the number of ES, without the need for additional hardware.
| Original language | English |
|---|---|
| Title of host publication | 2025 Energy Conversion Congress & Expo Europe (ECCE Europe) |
| Place of Publication | Piscataay, NJ |
| Publisher | IEEE |
| Number of pages | 6 |
| ISBN (Electronic) | 9798331567521 |
| ISBN (Print) | 9798331567538 |
| DOIs | |
| Publication status | Published - 25 Nov 2025 |
| Event | IEEE Energy Conversion Congress & Expo Europe 2025 - International Convention Centre (ICC), Birmingham, United Kingdom Duration: 31 Aug 2025 → 4 Sept 2025 https://www.ecce-europe.org/2025/ |
Conference
| Conference | IEEE Energy Conversion Congress & Expo Europe 2025 |
|---|---|
| Abbreviated title | ECCE Europe 2025 |
| Country/Territory | United Kingdom |
| City | Birmingham |
| Period | 31/08/25 → 4/09/25 |
| Internet address |
Funding
This work was supported by the National Natural Science Foundation of China under Grant of 52277126.
Keywords
- railways energy storage
- sequence impedance model
- harmonic stability