Abstract
This paper presents a comprehensive analysis of the effectiveness of legacy power swing blocking (PSB) and out-of-step tripping (OST) functions in grid-forming voltage-source-converter (GFM-VSC) systems, considering the first-order power synchronizing control (PSC). By characterizing the power swing dynamics of PSC-VSC, it is observed that re-synchronization may occur even if the fault-clearing time exceeds the critical-clearing time (CCT). Specifically, when the current limitation is not reached, the PSB and OST functions may not misoperate, except at the maximum power transmission situation. Further, if the electrical center (i.e., the electrical midpoint of the total impedance of the line and two sources in a two-machine equivalent system) of the system is on the transmission line, even though the current limitation is not reached, the impedance trajectory may move into the distance protection relay zone during the re-synchronization process, leading to the misoperation of the distance relay. Time-domain simulations conducted in the PSCAD/EMTDC platform validate the accuracy of the theoretical analysis.
| Original language | English |
|---|---|
| Title of host publication | 22nd Wind And Solar Integration Workshop (wiw 2023) |
| Number of pages | 6 |
| Publisher | Institution of Engineering and Technology (IET) |
| Publication date | 2023 |
| Pages | 763-768 |
| ISBN (Electronic) | 978-1-83953-966-4 |
| DOIs | |
| Publication status | Published - 2023 |
| Event | 22nd Wind and Solar Integration Workshop, WIW 2023 - Copenhagen, Denmark Duration: 26 Sept 2023 → 28 Sept 2023 |
Conference
| Conference | 22nd Wind and Solar Integration Workshop, WIW 2023 |
|---|---|
| Country/Territory | Denmark |
| City | Copenhagen |
| Period | 26/09/2023 → 28/09/2023 |
Bibliographical note
Publisher Copyright:© Energynautics GmbH.
Keywords
- CIRCULAR CURRENT LIMITATION
- GRID-FORMING CONTROL
- OUT-OF-STEP TRIPPING
- POWER SWING BLOCKING
- POWER SYNCHRONIZING CONTROL