LCL filter design and robust converter side current feedback control for grid-connected Proton Exchange Membrane Fuel Cell system

Rasekh, Navid; Hosseinpour, Majid

doi:10.1016/j.ijhydene.2020.02.227

Cited by 30 publications

(31 citation statements)

References 39 publications

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“…The filter design should take power rating, inverter input voltage, switching frequency, modulation methods etc. into consideration in the purpose of the desired operation state [12]. The designed controller parameters are given in Table 2.…”

Section: Verifications Resultsmentioning

confidence: 99%

“…Assuming the computation delay is one sampling period, the inverter‐current feedback control is stable when the resonance frequency below f s /6 [10]. The systematic design of the LCL filter and proportional–resonant (PR) controller parameters for inverter‐current feedback control was proposed in [12] to ensure the inverter stability in a weak grid. Tang et al [10] proposed a second‐order notch filter based method in to estimate the damping information once some uncertainties, such as aging or temperature variation, make the LCL filter parameters fail to satisfy the design criterion.…”

Section: Introductionmentioning

confidence: 99%

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Passivity enhancement for LCL‐filtered grid‐connected inverters using the dominant‐admittance‐based controller

Chen

Zhao

Liu

et al. 2020

IET power electron.

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LCL filters are widely used for power quality improvement. However, its resonance complicates the design process. Although the single‐loop filter‐based control reduces the cost, it is not reliable because of the grid impedance variation at the point of common coupling (PCC). This study proposes a dominant‐admittance‐based controller to improve the passivity of the inverter. Meanwhile, no extra hardware cost increases. It first offers a single‐loop damping method using a low‐pass filter, which frees inverter from the conventional limitation (fres>fs/6). A graphical procedure is applied to coordinate the current loop design to mitigate the low‐pass filter's negative effects on bandwidth. Then it introduces the dominant admittance concept for the inverter with PCC voltage feedforward control, which provides a new starting point for the admittance reshaping of the filter‐based damping inverter. Based on this concept, a PCC voltage feedforward control using a second‐order low‐pass filter is presented. The inverter output admittance is passive up to the Nyquist frequency with the feedforward control. Although the additional control loop is introduced, the controller requires no extra sensors because the PCC voltage measurement has already existed for the grid synchronisation. Experimental results validate the proposed scheme.

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Section: Verifications Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Passivity enhancement for LCL‐filtered grid‐connected inverters using the dominant‐admittance‐based controller

Chen

Zhao

Liu

et al. 2020

IET power electron.

View full text Add to dashboard Cite

show abstract

“…Voltage profile quality is specified using indicators depicted in Figures 7 and 8. Equations (24) and (25) specify the calculation for average voltage deviation for the system. Figure 7 depicts the voltage profile determined for analysing the maximum load energy scenario, while Figure 8 depicts the voltage profile for minimum load capacity.…”

Section: Proposed System Analysismentioning

confidence: 99%

“…Voltage profile quality is specified using indicators depicted in Figures 7 and 8. Equations (24) and (25) specify the calculation for average voltage deviation for the system.…”

Section: Proposed System Analysismentioning

confidence: 99%

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A Novel Cooperative Controller for Inverters of Smart Hybrid AC/DC Microgrids

et al. 2020

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This paper presents a novel cooperative control technique concerning fully-distributed AC/DC microgrids. Distributed generation based on inverters has two types, i.e., Current Source Inverter (CSI), also referred to as PQ inverter, and Voltage Source Inverter (VSI). Both inverter forms have a two-layer coordination mechanism. This paper proposes a design method for the digital Proportional-Resonant (PR) controller that regulates the current inside an inverter. The inverters will improve the voltage quality of the microgrid while maintaining the average voltage of buses at the same desired level. There is comprehensive detail on the computations specific to resonant and proportional gains and digital resonance path coefficients. The paper includes a digital PR controller design and its analysis in the frequency domain. The analysis is based on the w-domain. The main contribution of this paper is the proposed method, which not only focuses on the transient response but also improves the steady-state response which smoothens the voltage; furthermore, all inverters are effectively involved to increase the capacity of the microgrid for better power management. The suggested cooperative control technique is used on an IEEE 14-bus system having fully distributed communication. The convincing outcomes indicate that the suggested control technique is an effectual means of regulating the microgrid’s voltage to obtain an evener and steady voltage profile. The microgrid comprises distributed resources and is used as the primary element to analyse power flow and quality indicators associated with a smart grid. Lastly, numerical simulation observations are utilised for substantiating the recommended algorithm.

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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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LCL filter design and robust converter side current feedback control for grid-connected Proton Exchange Membrane Fuel Cell system

Cited by 30 publications

References 39 publications

Passivity enhancement for LCL‐filtered grid‐connected inverters using the dominant‐admittance‐based controller

Passivity enhancement for LCL‐filtered grid‐connected inverters using the dominant‐admittance‐based controller

A Novel Cooperative Controller for Inverters of Smart Hybrid AC/DC Microgrids

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

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