A Step-by-Step Design Procedure of a Robust Control Design for Grid-Connected Inverter by LCL Filter in a Weak and Harmonically Distorted Grid

Hosseinpour, Majid; Asad, Mahastan; Rasekh, Navid

doi:10.1007/s40998-021-00414-z

Cited by 7 publications

(5 citation statements)

References 41 publications

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“…The two main active damping methods are single and multi-loop damping methods. Each of these loops includes the capacitor voltage loop (15), the capacitor current loop (16)(17)(18), and other loops. It should be noted that single-loop control strategies are advantageous because they are simple and perform satisfactorily due to the absence of supplementary measurement methods or passive damping measures.…”

Section: It Is Possible To Use Several Mppt Techniques Including Pert...mentioning

confidence: 99%

Design and Analysis of a Power Quality Improvement System for Photovoltaic Generation Based on LCL-Type Grid Connected Inverter

Hosseinpour,

Dastgiri,

Shahparasti

2024

IJE

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Section: It Is Possible To Use Several Mppt Techniques Including Pert...mentioning

confidence: 99%

Design and Analysis of a Power Quality Improvement System for Photovoltaic Generation Based on LCL-Type Grid Connected Inverter

Hosseinpour,

Dastgiri,

Shahparasti

2024

IJE

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“…Also, by replacing ( 9) and ( 13) in (14), the current injected into the grid based on CVTF by applying a component proportional to the reference current i ref (s) and a component proportional to the grid voltage disturbance v g (s) can be obtained as follows:…”

Section: Cvtfmentioning

confidence: 99%

“…The use of resonance attenuation methods is necessary to ensure the stability of the LCL-based gridtied systems. 12 In general, resonance damping methods arising from LCL filters are divided into two categories: active damping methods 13,14 and passive damping methods. 15 Active damping methods are more favored due to their lower power losses, efficiency, and greater flexibility compared to passive damping methods.…”

Section: Introductionmentioning

confidence: 99%

Grid‐tied PEMFC power conditioning system based on capacitor voltage thorough feedback procedure in a weak and harmonics‐polluted network

Hosseinpour,

Sabetfar,

Shahparasti

2023

Energy Science & Engineering

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Proton exchange membrane fuel cells (PEMFC) have been noticed by researchers due to their high efficiency, low pollution, and high‐power density in distributed generation systems. In this paper, an LCL‐type grid‐tied PEMFC fuel cell power conditioning system is evaluated in a harmonics‐polluted low‐voltage grid. The LCL‐filters can lead to resonance and instability despite their capability to attenuate harmonics. In this research, a transformer has been used to connect the fuel cell inverter to the grid. The grid‐side inductor of LCL‐filter is realized by the leakage inductance of the transformer. In addition, for more effective resonance damping and attenuation of current ripples caused by the grid voltage harmonics, a capacitor voltage comprehensive feedback control has been designed and investigated. The comprehensive feedback control of the capacitor voltage contains proportional, first and second‐order derivative terms. In the proposed control scheme, the capacitor‐current‐feedback is opposed by the capacitor voltage derivative term due to reverse loop gain, which leads to deleting both of these loop gains. As a result, there is no need to utilize a current sensor in this control method. Consequently, the proportional and second‐order derivative terms of the capacitor voltage attenuate the LCL‐filter resonance. A low‐pass filter is also considered in the second‐order derivative loop in the controllable frequency range to ensure system stability. The simulation results of the PEMFC power conditioning system in different conditions confirm the proper attenuation of LCL resonance of grid‐tied inverter, high‐quality current injection to the harmonics polluted grid, the suitable stability, and the appropriate dynamic response for the proposed system. Under the proposed control scheme, the fuel cell power conditioning system demonstrates satisfactory stability. Even when reducing the LCL filter values by 5%–20%, the system maintains its stability effectively. Moreover, the THD of the injected current into the grid, employing the proposed control strategy, has been successfully reduced to an impressive value of 1.97% in a weak and harmonical grid.

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“…where i g , i ref , and v g are the RMS values. Considering | T o (j2πf o )| ≫ 1, E A can be expressed as (34).…”

Section: Steady-state Errormentioning

confidence: 99%

“…However, system performance may be impaired in weak networks. In the study by Hosseinpour et al, 34 a grid‐connected battery system by considering the grid voltage feed‐forward loop and eliminating delays is investigated. This method can inject high‐quality current into the low‐voltage network.…”

Section: Introductionmentioning

confidence: 99%

A robust controller design procedure for LCL‐type grid‐tied proton exchange membrane fuel cell system in harmonics‐polluted network

Hosseinpour

Kholousi

Poulad

2022

Energy Science & Engineering

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Proton exchange membrane fuel cell (PEMFC), due to its high efficiency and good stability, is one of the most efficient and effective sources of alternative renewable energy. The LCL filters are utilized to attenuate the harmonics caused by inverter‐based distributed power generation systems (DPGS). In this paper, a systematic robust control design is presented for an LCL‐type grid‐tied PEMFC inverter. The proposed nested control includes the capacitor current feedback and the outer grid current loops, considering the computational delays. The proposed control results in more accurate and realistic modeling to transfer the power of PEMFC and inject a high‐quality current into a weak and harmonics‐polluted network. Also, by utilizing the proposed method, the computational delays that affect the damping capability are eliminated, and the performance of the control system is improved. In addition, designing a virtual series and parallel impedances strengthens the phase and amplitude of the inverter output impedance. As a result, the robust operation of the inverter for significant changes in network impedance is improved, and the system well attenuates the mains voltage harmonics. The simulation results in Matlab/Simulink environment confirm the performance of the control system and the suitable quality of the injected current of the PEMFC system into the weak and harmonic‐polluted network.

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A Step-by-Step Design Procedure of a Robust Control Design for Grid-Connected Inverter by LCL Filter in a Weak and Harmonically Distorted Grid

Cited by 7 publications

References 41 publications

Design and Analysis of a Power Quality Improvement System for Photovoltaic Generation Based on LCL-Type Grid Connected Inverter

Design and Analysis of a Power Quality Improvement System for Photovoltaic Generation Based on LCL-Type Grid Connected Inverter

Grid‐tied PEMFC power conditioning system based on capacitor voltage thorough feedback procedure in a weak and harmonics‐polluted network

A robust controller design procedure for LCL‐type grid‐tied proton exchange membrane fuel cell system in harmonics‐polluted network

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