A Step by Step Design Procedure of PR controller and Capacitor Current Feedback Active Damping for a LCL-Type Grid-tied T-Type Inverter

Rasekh, Navid; Rahimian, Mohammad Mohsen; Hosseinpour, Majid; Dejamkhooy, Abdolmajid; Akbarimajd, Adel

doi:10.1109/pedstc.2019.8697853

Cited by 6 publications

(7 citation statements)

References 13 publications

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“…According to (9), to eliminate the grid current distortion caused by the grid voltage harmonics, a feedforward path from v g (s) is added to the G x1 (s) output, as shown in…”

Section: Grid-voltage-full-feedforward (Gvff)mentioning

confidence: 99%

“…Different network interface filters, including L, LC, LCL, and LLCL-filters are utilized. 8,9 Since in an L-type filter, only one inductor is responsible for reducing current harmonics, the inductor size or switching frequency must be high enough to improve the performance, as losses increase in both cases. The LC filter performs better at high frequencies and is smaller than the L filter.…”

Section: Introductionmentioning

confidence: 99%

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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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“…According to (9), to eliminate the grid current distortion caused by the grid voltage harmonics, a feedforward path from v g (s) is added to the G x1 (s) output, as shown in…”

Section: Grid-voltage-full-feedforward (Gvff)mentioning

confidence: 99%

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

Self Cite

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“…The output impedance of the proposed control scheme, according to Figure 7C, is calculated as Equation (13). A Norton equivalent circuit can be provided to the grid-tied inverter, including an ideal current reference i s (s) in parallel with the output impedance Z o (s).…”

Section: Performance Control and Shaping Of Output Impedancementioning

confidence: 99%

“…The LCL filters are very suitable compared to L and LC filters due to their high ability to dampen the harmonics and their smaller size. [13][14][15] However, the inherent resonance of the LCL filter inflicts some problems in injecting stable and high-quality current into the network. 16 The stability and power quality of the grid-connected inverter are affected when the distributed power generation system (DPGS) is connected to a weak grid with a long radial feeder.…”

Section: Introductionmentioning

confidence: 99%

“…The LCL filter consists of an inverter side inductor, a grid side inductor, and a capacitor. The LCL filters are very suitable compared to L and LC filters due to their high ability to dampen the harmonics and their smaller size 13–15 . However, the inherent resonance of the LCL filter inflicts some problems in injecting stable and high‐quality current into the network 16 …”

Section: Introductionmentioning

confidence: 99%

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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 modified SOGI-FLL algorithm with DC-offset rejection improvement for single-phase inverter applications

Ardalan

Rasekh

Khaneghah

et al. 2022

Int. J. Dynam. Control

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A Step by Step Design Procedure of PR controller and Capacitor Current Feedback Active Damping for a LCL-Type Grid-tied T-Type Inverter

Cited by 6 publications

References 13 publications

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

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

A modified SOGI-FLL algorithm with DC-offset rejection improvement for single-phase inverter applications

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