Combined SHE-LLCL Design for a Real Case Photovoltaic Power Station

Chakroun, Rawia; Ayed, Ramzi Ben; Derbel, Nabil

doi:10.1007/s40313-020-00634-4

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…Filters. Regardless LCL or LLCL [10], both filters combined with SHM respect successfully grid code requirements as shown in Figure 16. is appreciable result can be attributed e spectrum obtained with LLCL filters better than the LCL filter as almost harmonics amplitude is lower than the LCL filter.…”

Section: Frequency Domain Comparison Between Lcl and Llclmentioning

confidence: 85%

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Frequency and Time-Domain Comparison between LCL and LLCL Filters for a Grid-Connected Inverter Using Selective Harmonic Modulation

Chakroun

Ayed

Derbel

2021

Mathematical Problems in Engineering

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This paper shows a comparison between the analytical design of a photovoltaic power station filter and a real-case filter. Indeed, the analytical filter considered in the design phase is an LCL filter, while the real case is an LLCL filter. This difference could impact the current harmonics rejected on the grid and breaks grid codes. The main objective of this study is to maximize the power injected into the network while respecting the harmonic rejection standards in force, namely, G5/4, French decree of 2008, and IEEE 519 standards, by adopting a current control design to improve the performance of a grid-connected three-phase inverter, which is regarded as the central component in a photovoltaic production system. The selective harmonic modulation strategy (SHM) is a common technique to achieve this goal. For that, a frequency and a time-domain comparison for a grid-connected inverter using both filters have been highlighted. Simulation results confirm the excellent transient behavior of both filter topologies and the advantage to consider the flexibility of LLCL filter when combined with SHM strategy. This manuscript is an extension of an earlier version of “Comparison between LCL and LLCL Filters for a Grid Connected Inverter Using Selective Harmonic Modulation.”

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Section: Frequency Domain Comparison Between Lcl and Llclmentioning

confidence: 85%

“…e same electrical scheme using the LCL filter is considered, but the leakage inductor related to the cable length has been added as shown in Figure 6. at makes the LLCL filter flexible as its behavior depends on the cable length which is optimized in [10]. e leakage inductor of a tertiary cabling is named L 3Y1 .…”

Section: Equivalent Electrical Diagram Modelingmentioning

confidence: 99%

Frequency and Time-Domain Comparison between LCL and LLCL Filters for a Grid-Connected Inverter Using Selective Harmonic Modulation

Chakroun

Ayed

Derbel

2021

Mathematical Problems in Engineering

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“…In autumn, the temperature and irradiance decreased [16] , and PR did not change much. This was due to the combined effect of the increase of component efficiency caused by the decrease of temperature and the decrease of irradiance [19] , while the change of PRstc was larger.…”

Section: Annual and Monthly Prstc Analysis Of Power Stationmentioning

confidence: 91%

Research on performance ratio composition and standard energy efficiency ratio correction method of photovoltaic power station

Peng,

Wang,

et al. 2024

J. Phys.: Conf. Ser.

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The performance ratio (PR) of the system is used to quantify the power generation efficiency of the photovoltaic power generation system. The size of the index is affected by many factors. After the environmental impact is compensated, the standard energy efficiency ratio (PRstc) of the system is obtained. PRstc is an important index for evaluating the power generation efficiency of photovoltaic power stations. Improving the accuracy of PRstc is conducive to improving the state evaluation and analysis capabilities of power stations, providing a theoretical basis for comparative analysis of photovoltaic power stations in different regions, and improving the scientific operation and maintenance of power stations. The PRstc calculation method of the industry standard NB / T 10394-2020 does not consider the influence of the change of the power temperature coefficient of the component and the weak light response of the photovoltaic cell, which ultimately leads to the calculation result less than the actual value. In order to reduce the error in the calculation of PRstc, the mathematical relationship between PR and power loss of photovoltaic power station is discussed. The calculation method of power loss caused by the change of environmental factors is proposed, and the PRstc is calculated by using the variation. Finally, the PRstc is calculated according to the actual operation data of photovoltaic power station, and compared with the calculation method of industry standard NB / T 10394-2020. The results show that when the total irradiation dose is high, the difference between the two PRstc values is less than 2 %. When the total irradiation is low, the calculation result is larger than that of the standard method, and the difference between the two increases with the decrease of the total irradiation. Due to the consideration of the change of power generation caused by the characteristics of photovoltaic modules, the error caused by the change of power temperature coefficient and weak light response of modules is reduced, which is more advantageous than the calculation method of industry standard.

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“…Tis system is already presented in [11]. Te flter inductor is integrated with the transformer to lower the overall volume and weight of the system, resulting in cost savings.…”

Section: Problem Description Of a Real Case Of One Mw Pv Substationmentioning

confidence: 99%

“…Te flter inductor is integrated with the transformer to lower the overall volume and weight of the system, resulting in cost savings. Te tertiary inductor is caused by the leakage inductance of the cables used to link the capacitor's bank to the tertiary: it is also proved in [11] that this parameter has a signifcant infuence on harmonic rejections.…”

Section: Problem Description Of a Real Case Of One Mw Pv Substationmentioning

confidence: 99%

Components’ Tolerance Impact on the Design of a Real Case of One MW PV Substation

Ayed

Chakroun

Derbel

et al. 2023

Discrete Dynamics in Nature and Society

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In this article, a real case of a one MW PV substation design problem is described. The impact of the tolerances of power components (mainly inductors and capacitors) on the design is highlighted through two studies using two different control strategies that are selective harmonic elimination (SHE) and selective harmonic modulation (SHM). The obtained results show that the components’ tolerances have a significant effect on the design, especially for the SHE strategy. While the design using SHM control shows a weak sensitivity to the components’ tolerance. In this study, an upgrade of the most sensitive control strategy is proposed in order to improve its sensitivity against components’ tolerance. The results show that the strategy upgrading leads not only to improving the sensitivity but also to generating better power quality.

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Combined SHE-LLCL Design for a Real Case Photovoltaic Power Station

Cited by 5 publications

References 16 publications

Frequency and Time-Domain Comparison between LCL and LLCL Filters for a Grid-Connected Inverter Using Selective Harmonic Modulation

Frequency and Time-Domain Comparison between LCL and LLCL Filters for a Grid-Connected Inverter Using Selective Harmonic Modulation

Research on performance ratio composition and standard energy efficiency ratio correction method of photovoltaic power station

Components’ Tolerance Impact on the Design of a Real Case of One MW PV Substation

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