Journal
IEEE TRANSACTIONS ON POWER DELIVERY
Volume 37, Issue 1, Pages 268-278Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPWRD.2021.3057624
Keywords
Windings; Inductors; Magnetic cores; Legged locomotion; Load flow; Distortion; Impedance; Continuously variable series reactors (CVSRs); variable inductor (VI); power flow control
Categories
Funding
- Advanced Research Projects Agency-Energy through Oak Ridge National Laboratory
- Department of Energy under NSF Award [EEC1041877]
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This paper proposes a novel CVSR based on a DCC for power flow management in transmission systems. By comprehensively analyzing the three-dimensional electromagnetic interaction, a high-fidelity reluctance model of the CVSR and a reliable high-power DCC converter are designed. Experimental results validate the effectiveness of the proposed system design and modeling methodology.
This paper proposes a novel continuously variable series reactor (CVSR) based on a dc current controller (DCC) to manage power flow in transmission systems. There are three major contributions. First, the three-dimensional electromagnetic interaction has been comprehensively analyzed to extend the understanding beyond the conventional 2D relationship. Second, a high-fidelity reluctance model of the CVSR with an improved DCC model is proposed and implemented. To overcome the fundamental concern for the system modeling, the DCC has been modeled as an ideal current source in parallel with an output impedance. The induced back-EMF can be precisely projected which provides critical design guidelines for the DCC. Third, inspired by the theoretical analysis and modeling, a reliable high power DCC converter is designed accordingly to interface with kV-level back-EMF and supply kA-level dc current for a 115 kV/1500 A CVSR. Experiments are conducted in a practical transmission demonstration system. When the ac current in the transmission system varies from zero to 1500 A, experimental results show that the proposed CVSR can continuously regulate the reactance from 1.6 omega to 5 omega, validating the effectiveness of the proposed system design and modeling methodology.
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