Impact of the DFIG-Based Wind Farm Connection on the Fault Component-Based Directional Relay and a Mitigation Countermeasure

Xu Li, Yuping Lu and Tao Huang
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Xu Li: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Yuping Lu: School of Electrical Engineering, Southeast University, Nanjing 210096, China
Tao Huang: R & D Department, NR Electric CO., LTD., Nanjing 211102, China

Energies, 2020, vol. 13, issue 17, 1-27

Abstract: With high sensitivity and strong tolerance capability for the fault resistance, the fault component-based directional relay (FCBDR) has drawn considerable attention from industry and academia. However, the best application environment for FCBDR no longer exists when considering the large-scale connection of the doubly fed induction generator (DFIG)-based wind farms. Through a detailed analysis of the superimposed impedance of DFIG, this paper reveals that the performances of FCBDRs may be shown negatively impacted by the fault behaviors of DFIG when the crowbar protection inputs. In addition, this paper proposes a mitigation countermeasure to deal with those issues. The proposed countermeasure takes advantage of the different superimposed impedance features of DFIG compared with that of the synchronous generator (SG) to enhance the adaptability of the conventional FCBDRs. Extensive simulation results show that the proposed countermeasure can differentiate the fault direction clearly under different fault conditions.

Keywords: fault component-based directional relay (FCBDR); doubly fed induction generator (DFIG); superimposed impedance; synchronous generator (SG); mitigation countermeasure (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
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