An islanding detection method for multi-DG systems based on high-frequency impedance estimation

Jia, Ke; Wei, Hongsheng; Bi, Tianshu; Thomas, David W.P.; Sumner, Mark

Abstract

Active islanding detection methods are generally employed for grid-connected inverter-based Distributed Generation (DG). However, there might be mutual influences and power quality issues caused by the disturbance signal when multiple inverters are involved. To address those problems, this paper analyzes the potential failure mechanism of the f-Q (frequency-reactive power) drifting active method in multiple-DG situations. Then, a novel high frequency transient injection based islanding detection method that is suitable for both single and multiple-DGs is proposed. Compared with the conventional injection methods, a high frequency impedance model for DG is provided for better theoretical analysis. By means of the intermittent Time Domain Low Voltage Condition (TDLVC) injection control, this method can achieve good accuracy and reduce disturbances to power system. 

Citation

Jia, K., Wei, H., Bi, T., Thomas, D. W., & Sumner, M. (2017). An islanding detection method for multi-DG systems based on high-frequency impedance estimation. IEEE Transactions on Sustainable Energy, 8(1), 74-83. https://doi.org/10.1109/TSTE.2016.2582846

• Journal Article Type: Article
• Acceptance Date: Jun 16, 2016
• Online Publication Date: Jun 21, 2016
• Publication Date: Jan 31, 2017
• Deposit Date: Mar 6, 2018
• Publicly Available Date: Mar 6, 2018
• Journal: IEEE Transactions on Sustainable Energy
• Print ISSN: 1949-3029
• Electronic ISSN: 1949-3029
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 8
• Issue: 1
• Pages: 74-83
• DOI: https://doi.org/10.1109/TSTE.2016.2582846
• Keywords: Islanding detection; Active injection method; High frequency impedance estimation; Multi-inverter-based DG
• Public URL: https://nottingham-repository.worktribe.com/output/838328
• Publisher URL: http://ieeexplore.ieee.org/document/7496908/
• Additional Information: c2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including; reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
• Contract Date: Mar 6, 2018