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A Combined-Compensation Control on Harmonic Resonance for Grid-Connected Converters
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| Author(s) |
Kei SEKIGUCHI, Koji MAKI, Takahiro ISHIGURO |
| Abstract |
This paper presents a theoretical discussion on a combined-compensation control and its stability on harmonic resonance for grid-connected converters. The interaction between the gird impedance and the grid-connected converter potentially brings harmonic resonance. The compensation control with a digital filter and a virtual impedance is an effective approach of impedance shaping. Theoretical analysis reveals that the proper use of the two effectively enhances system stability. The theoretical design considering a compensation limit can minimize the effect of phase lag on the virtual impedance. Moreover, the trade-off issue between stability and transient response always comes up in impedance shaping. The disturbance observer with a dead band restores transient response only during faults and make up for the low sensitivity due to the digital filter. Finally, simulated results on a typical converter system verify this analysis. |
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| Filename: | 0091-epe2023-full-11371817.pdf |
| Filesize: | 1.086 MB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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