Journal
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Volume 51, Issue 5, Pages 3570-3578Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIA.2015.2420630
Keywords
Active hybrid power source; energy control system; hybrid dc microgrid; pulse load; supercapacitor
Funding
- Florida International University Dissertation Year Fellowship
- Office of Naval Research
- U.S. Department of Energy
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In this paper, a new energy control scheme is proposed for actively controlled hybrid dc microgrid to reduce the adverse impact of pulsed power loads. The proposed energy control is an adaptive current-voltage control (ACVC) scheme based on the moving average measurement technique and an adaptive proportional compensator. Unlike conventional energy control methods, the proposed ACVC approach has the advantage of controlling both the voltage and current of the system while keeping the output current of the power converter at a relatively constant value. For this study, a laboratory-scale hybrid dcmicrogrid is developed to evaluate the performance of the ACVC strategy and to compare its performance with other conventional energy control methods. Using experimental test results, it is shown that the proposed strategy highly improves the dynamic performance of the hybrid dc microgrid. Although the ACVC technique causes slightly more bus voltage variation, it effectively eliminates the high current and power pulsation of the power converters. The experimental test results for different pulse duty ratios demonstrated a significant improvement achieved by the developed ACVC scheme in enhancing the system efficiency, reducing the ac grid voltage drop and the frequency fluctuations.
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