Research on Grid Voltage Feed-forward Control of LCL Inverter consider Capacitor Current Estimate
Pages 166 - 172
Abstract
The three-phase grid-connected inverter system with LCL filter bears lower stability due to the characteristic of gaining peak at its resonance, and the distortion of grid voltage will cause grid-connected current. To address these problem, this paper adopts the method of applying capacitor current feedback to increase system damping and restrain the peak of resonance, in which the value of the capacitor current can be obtained through estimation, aiming to avoid increasing the extra sensors, then adopts the grid voltages feedforward scheme to eliminate the influences of the distorted grid voltage, and finally proposes the feedforward function of the grid voltage of a three-phase grid-connected inverter with an LCL filter in the stationary α-β frame. Simulation and experimental results show that it is effective that the method described in this paper.
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December 2020
687 pages
ISBN:9781450388665
DOI:10.1145/3452940
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Published: 17 May 2021
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- National key research and development plan
- National Natural Science Foundation of China
- Hunan Natural Science Foundation
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ICITEE2020: The 3rd International Conference on Information Technologies and Electrical Engineering
December 3 - 5, 2020
Hunan, Changde City, China
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