Journal article
Multiobjective Coordinated Control Strategy for Grid-Connected Inverter under Unbalanced Voltage Conditions
Journal of energy engineering, Vol.146(3)
06/2020
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Abstract
To improve grid-connected inverter operation performance, a power oscillation and current harmonic suppression coordinate control strategy that considers the problem of overcurrent is proposed in this work. First, the internal relationship between power fluctuation suppression and current balance is analyzed, and then, combining dynamic regulation of the active and reactive power settings, the peak value of the grid-connected current is limited within a safe range. Second, a simplified Fourier transform algorithm is proposed for the detection of fundamental positive and negative sequence vector components and band-pass filtering the three-phase input signals. By simplifying the transform and introducing a recursion algorithm, the online computational complexity is reduced and the controller based on this algorithm is used as an inner current loop regulator. Finally, the controller was investigated using simulations, and experimental results indicated that the output power quality of the grid-connected inverter under unbalanced grid voltages can be substantially improved.
Details
- Title
- Multiobjective Coordinated Control Strategy for Grid-Connected Inverter under Unbalanced Voltage Conditions
- Creators
- Lei Miao - University of Science and Technology BeijingYongjun Zhang - University of Science and Technology BeijingXiong Xiao - University of Science and Technology BeijingQiang Guo - University of Science and Technology BeijingJiawei Zhang - University of SydneyTanju Yildirim - Australian National UniversityHuichuan Liu - University of Sydney
- Publication Details
- Journal of energy engineering, Vol.146(3)
- Publisher
- American Society of Civil Engineers
- Identifiers
- 991013160127802368
- Copyright
- ©2020 American Society of Civil Engineers.
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article