Islanding Detection of Synchronous Distributed Generator Based on the Active and Reactive Power Control Loops

Reza Zamani, Mohamad-Esmail Hamedani-Golshan, Hassan Haes Alhelou, Pierluigi Siano and Hemanshu R. Pota
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Reza Zamani: Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
Mohamad-Esmail Hamedani-Golshan: Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
Hassan Haes Alhelou: Department of Electrical and Computer Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
Pierluigi Siano: Department of Management & Innovation Systems, University of Salerno, 84084 Salerno, Italy
Hemanshu R. Pota: School of Engineering and Information Technology, The University of New South Wales, Canberra 2610, Australia

Energies, 2018, vol. 11, issue 10, 1-15

Abstract: There has been a considerable importance for the islanding detection due to the growing integration of distributed generations (DGs) in the modern power grids. This paper proposes a novel active islanding detection scheme for synchronous DGs, considering two additional compensators and a positive feedback for each of active and reactive power control loops. The added blocks are designed using the small gain theorem and stability margins definition considering characteristics of open loop transfer functions of synchronous DG control loops. Islanding can be detected using the proposed method even where there is an exact match between generation and local load without sacrificing power quality. In addition, the performance of the proposed method can be retained even with high penetration of motor loads. The proposed scheme improves the stability and power quality of the grid, when the synchronous DG is subjected to the grid-connected disturbances. Furthermore, this method augments the stability margins of the system in the grid-connected conditions to enhance the disturbances ride-through capability of the system and reduce the negative impact of the active methods on the power quality. Simultaneous advantages of the proposed scheme are demonstrated by modeling a test system in MATLAB software and time-domain simulation achieved by PSCAD.

Keywords: active islanding detection; distributed synchronous generator; anti-islanding protection; stability analysis; synchronous DG control loop; disturbance ride-through (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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