Microgrid protection using Hilbert–Huang transform based-differential scheme

• Published in: IET generation, transmission & distribution Vol. 10; no. 15; pp. 3707 - 3716
• Main Authors: Gururani, Ashika, Mohanty, Soumya R, Mohanta, Jagadish Chandra
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 17.11.2016
• Subjects: Algorithms; Assessments; Computer simulation; differential current; Distributed generation; distributed power generation; Effectiveness; Fault detection; fault diagnosis; HHT scheme; High impedance; high impedance fault; Hilbert transforms; Hilbert–Huang transform based‐differential scheme; microgrid protection; microgrid test model; nonstationary signal processing algorithm; power generation faults; power generation protection; power generation reliability; PSCAD; reliability; time‐frequency analysis; time–frequency‐based differential scheme; Transforms; fault diagnosis; power generation reliability; HHT scheme; reliability; fault detection; time–frequency-based differential scheme; distributed power generation; PSCAD; Hilbert transforms; power generation protection; differential current; distributed generation; time-frequency analysis; Hilbert–Huang transform based-differential scheme; high impedance fault; power generation faults; microgrid test model; nonstationary signal processing algorithm; microgrid protection
• ISSN: 1751-8687; 1751-8695; 1751-8695
• DOI: 10.1049/iet-gtd.2015.1563

Time–frequency-based differential scheme is proposed for microgrid protection using non-stationary signal analysis. The non-stationary signal processing algorithm Hilbert–Huang Transform (HHT) have been implemented for the protection objective and the comparative assessment with that of S-transform, differential current is carried out in order to demonstrate the reliability of the proposed protection scheme with different case studies. The series of simulation results demonstrates the efficacy of HHT, than that of S-transform in some critical cases such as high impedance fault where accurate detection is a challenge. The configuration of the microgrid test model has been developed in PSCAD with different distributed generation such as photovoltaic and wind generation system penetrated at different buses. Thus, it is found that the HHT scheme is quite reliable and efficient for fault detection objective.