Abstract
This paper investigates a novel design concept, in which a hybrid power interface system (HPIS) is constructed to work smartly in various micro-grid (MG) operations. Some distributed generation (DG) systems, e.g. the wind turbine generator (WTG) and the photovoltaic (PV) systems conventionally generate real power based on natural conditions thus the average utilization rate of the entire asset is normally low. To eliminate this shortcoming, the proposed HPIS aims to use the DG inverter system optimally. To achieve a cost-effective design, the modular design concept and the related droop control algorithms are incorporated into the proposed HPIS to maximize its operating capability in terms of real power regulation, active power filter (APF) functions for current harmonics compensation and reactive power compensator for MG voltage support and power factor correction. The HPIS is designed to fully utilize the DG inverter capacity after performing various real power control functionalities required by the system operator. In this paper, the mathematical model of HPIS and its related controllers designed in two-axis reference frame are firstly addressed. Then, simulation studies on a simplified MG network are carried out in the Matlab/Simulink software environment. Typical results are presented with brief discussions to demonstrate the feasibility and performances of the proposed control schemes.
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Acknowledgments
This work was supported in part by the National Science Council of Taiwan, R.O.C. through: NSC 101 - 2221-E -239-031.
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Ma, TT. (2014). Investigation on Control Issues in Power Converters for Advanced Micro-Grid Operations. In: Yang, GC., Ao, SI., Huang, X., Castillo, O. (eds) Transactions on Engineering Technologies. Lecture Notes in Electrical Engineering, vol 275. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-7684-5_4
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DOI: https://doi.org/10.1007/978-94-007-7684-5_4
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