The high-voltage dc (HVDC)-connected offshore wind farms (OWF) is a power electronic converter dominated power system, where conventional protections, including overcurrent protection, distance protection, and differential protection, may not operable effectively. To reveal the impact of converter control on the efficacy of conventional protection relays, this paper first investigates the highly controlled fault current characteristics of HVDC system and OWF. Then, the basic operation principles of conventional protection relays are presented to elaborate their responses to the fault currents of HVDC system and of OWF, based on which, scenarios that lead to the malfunction of protection relays are identified. Finally, the theoretical analysis is verified by electromagnetic transient (EMT) simulations.
|Title of host publication||2022 IEEE 13th International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2022|
|Publication status||Published - 2022|
|Event||13th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2022 - Kiel, Germany|
Duration: 26 Jun 2022 → 29 Jun 2022
|Conference||13th IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2022|
|Period||26/06/2022 → 29/06/2022|
|Series||IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)|
Bibliographical noteFunding Information:
This work is funded by the European Union’s Horizon 2020 Research and Innovation Program under the Marie Sklodowska-Curie grant agreement No 861398.
© 2022 IEEE.
- converter control
- fault current
- Offshore wind farms
- power electronic converter
- protection relay