Abstract
As an effective carrier of distributed generation, a microgrid is an effective way to ensure that distributed power can be reasonably utilized. However, due to the property of line impedance and other factors in a microgrid, reactive power supplied by distributed generation units cannot be shared rationally. To efficiently improve reactive power sharing, this paper proposes a reactive power-voltage control strategy based on adaptive virtual impedance. This method changes the voltage reference value by adding an adaptive term based on the traditional virtual impedance. Meanwhile, a voltage recovery mechanism was used to compensate the decline of distributed generation (DG) output voltage in the process. MATLAB/Simulink simulations and experimental results show that the proposed controller can effectively improve the steady state performance of the active and reactive power sharing. Finally, the feasibility and effectiveness of the proposed control strategy were verified.
Original language | English |
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Article number | 3057 |
Journal | Energies |
Volume | 12 |
Issue number | 16 |
Number of pages | 15 |
ISSN | 1996-1073 |
DOIs | |
Publication status | Published - Aug 2019 |
Keywords
- Adaptive virtual impedance
- Distributed power
- Microgird
- Reactive power sharing
- Voltage recovery mechanism