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Stability Improvement of LCL-Based Fuel Cell Power Quality Enhancement System Utilizing Phase Compensation of Current Regulator
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Majid Hosseinpour *1   , Rasoul Akbari1 , Mahdi Shahparasti2 |
1- University of Mohaghegh Ardabili
2- University of Vassa |
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Abstract: (83 Views) |
Grid-connected inverters connect distributed generation and renewable energy sources to the grid. Various filters, including the LCL filter, are utilized to increase the quality of grid-injected power. In addition to the inherent resonance of the LCL filter, the weak network with variable network impedance leads to the instability of the power transmission system. This paper aims to improve the injection power quality of the LCL filter-based grid-connected fuel cell with control based on the grid current feedback and capacitor current active damping. Although active damping can theoretically guarantee the grid-connected passive inverter behavior, the system performance is sensitive to both the current controller phase delay and the fluctuations of the filter parameters. To control these two factors, a suitable phase delay compensator has been proposed to enhance the passive behavior. In this paper, the LCL filter-based grid-connected fuel cell power conditioning system with control based on the grid current feedback and capacitor current active damping has been studied, and the passive and stable performance of this system has been evaluated considering the effect of the current regulator phase delay. The process of systematic design of the control system parameters has been described with necessary details and the passive performance of the grid-connected system has been evaluated. The simulation results of the grid-connected fuel cell power optimization system indicate the current injection with very high quality and the passive behavior of the system under changes in the impedance of the weak network. |
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| Keywords: Grid-connected inverter, Fuel cell, Active damping, Phase compensator |
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Type of Study: Research |
Received: 2024/10/3 | Accepted: 2025/08/8 | Published: 2025/08/10
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Hosseinpour M, Akbari R, Shahparasti M. Stability Improvement of LCL-Based Fuel Cell Power Quality Enhancement System Utilizing Phase Compensation of Current Regulator. ieijqp 2025; 14 (2) URL: http://ieijqp.ir/article-1-1013-en.html
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