Harmonic Analysis of Grid-Connected Solar PV Systems with Nonlinear Household Loads in Low-Voltage Distribution Networks

Ahsan, Syed Muhammad; Khan, Hassan Abbas; Hussain, Akhtar; Tariq, Sarmad; Zaffar, Nauman Ahmad

doi:10.3390/su13073709

Cited by 45 publications

(16 citation statements)

References 35 publications

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“…21 are 11.57% and 10.67% respectively, which are higher than the standards and unacceptable. According to IEEE Standard 519-2014 [33], the THD of the PCC voltage should be smaller than 8% (5%) in the low (medium) voltage application that the PCC bus voltage is lower than 69 kV [34]. To reduce the harmonics, suitable optimization for the inverter parameters is necessary.…”

Section: Simulation Analysis Of Pcc Voltage Harmonicsmentioning

confidence: 99%

A Double-PLLs-Based Impedance Reshaping Method for Extending Stability Range of Grid-Following Inverter Under Weak Grid

Huang

Zhou

et al. 2022

IEEE Trans. Power Electron.

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Conventional vector current control (VCC) scheme has been widely used in grid-connected inverter systems. However, it suffers from severe power limitation issues under weak grids. This paper reveals that the coupling effect between the power delivery and the voltage at the point of common coupling (PCC) causes the static power limit, which only depends on physical parameters of the system. When the stability of the control scheme is considered, negative resistance characteristics of the phase-locked loop (PLL) mainly result in the small-signal stability limit, which is called the dynamic power limit in this paper. Because the small-signal stability limit can be improved by using different control methods, it attracts lots of research attention. In this paper, a simplified d-q small-signal impedance model is introduced to show the destabilizing factors. Then, an initial small-signal impedance reshaping method is proposed to counteract the major destabilizing factor caused by the PLL. Based on the initial impedance reshaping method, an improved control scheme is proposed. Through exhaustive mathematical analysis, it is proved that the dynamic power limit can be extended almost to the static power limit by using this proposed method. Finally, simulation and experimental results verify the effectiveness of the proposed method. 1

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Section: Simulation Analysis Of Pcc Voltage Harmonicsmentioning

confidence: 99%

A Double-PLLs-Based Impedance Reshaping Method for Extending Stability Range of Grid-Following Inverter Under Weak Grid

Huang

Zhou

et al. 2022

IEEE Trans. Power Electron.

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“…The major focus of this research, dealing with the impact of grid-connected PV systems, is based on power quality analysis and harmonic mitigation techniques [17][18][19]. In this article, the focus is on the evaluation of electric power quantities based on different solar irradiance levels.…”

Section: Used Methodologymentioning

confidence: 99%

Experimental Evaluation of Distortion Effect for Grid-Connected PV Systems with Reference to Different Types of Electric Power Quantities

Ikić

Mikulović

2022

Energies

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Aware of the fact that the installed PV capacity and its power production rapidly increased in the last decade, with the huge impact that has been done to the power system, the distortion effects for grid-connected PV systems with reference to different types of electric power quantities will be presented in this article. The impact of the frequent fluctuation of solar irradiance on the behavior of the grid-connected PV system, due to cloud movements and resulting shadows and in terms of power quality and the evaluation of power components, is the topic of analysis in this research. Besides the simulation results of certain study cases, an experimental evaluation of electric power quantities on an actual PV system in real weather conditions was also performed. The experimental setup, formed through the combination of a PC and multifunctional I/O board with an appropriate software solution, was established and used for obtaining the target results. The methodology used for the evaluation of electric power quantities relied on the current physical components (CPC) theory for power definition. The experimental results were obtained for three different cases, namely, the low, medium, and high solar irradiance cases. On the basis of these results, the conclusions about distortion effects are given.

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“…II. choosing the field parameters, number of connected panels, and the system capacities and applying the Monte-Carlo method to handle the variations in the irradiance, which significantly affect the THD [24].…”

Section: Modeling Of Total Harmonic Distortion Of a Photovoltaic Mult...mentioning

confidence: 99%

Stochastic Optimal Harmonic Suppression with Permissible Photovoltaic Penetration Level for Grid-Linked Systems using Monte Carlo-Based Hybrid NSGA2-MOPSO

Abubakar,

Borkor,

Amoako-Yirenkyi

2023

Preprint

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Integrating a high Penetration level of Solar Photovoltaic (SPV) power in the electricity grid could enhance the system’s sustainability, reliability, and affordability. Nevertheless, at higher Penetrations, the intermittency, non-dispatchable nature of the SPV generation, and the extensive utilization of inverter-based interfaces generate excessive harmonic distortions that damage power system devices and interrupt the smooth operation of the power system. Thus, the severity of the harmonic distortion impacts varies as a function of the degree of the SPV Penetration level in the grid-connected system. Though the problem is highly nonlinear stochastic programming with multiple conflicting power quality criteria, no existing study holistically captures the randomness, the contradictory nature of the objectives, and the grid’s technical limitations simultaneously. This study proposes a novel Monte-Carlo-based Hybrid multi-objective methodology to scale up the Photovoltaic Penetration level with a minimum Total Harmonic Distortion (THD) for multilevel SPV inverters in grid-connected systems without violating the system’s standard operational limitations. Six state-of-the-art Multi-Objective Evolutionary algorithms were implemented and compared using hypervolume indica- tor, execution time, and parametric statistical analysis to obtain a quality solution. The results showed that the Hybrid NSGAII-MOPSO outflanked the rest in terms of convergence, diversity, and execution time. It could be inferred that even under variable weather conditions, this harmonic suppression design approach could accurately optimize the SPV Penetration level and mitigate the THD without degrading the grid’s standard operational constraints. In comparison, the stochastic design technique creates a far more reliable SPV grid-connected system than the deterministic approach.

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Harmonic Analysis of Grid-Connected Solar PV Systems with Nonlinear Household Loads in Low-Voltage Distribution Networks

Cited by 45 publications

References 35 publications

A Double-PLLs-Based Impedance Reshaping Method for Extending Stability Range of Grid-Following Inverter Under Weak Grid

A Double-PLLs-Based Impedance Reshaping Method for Extending Stability Range of Grid-Following Inverter Under Weak Grid

Experimental Evaluation of Distortion Effect for Grid-Connected PV Systems with Reference to Different Types of Electric Power Quantities

Stochastic Optimal Harmonic Suppression with Permissible Photovoltaic Penetration Level for Grid-Linked Systems using Monte Carlo-Based Hybrid NSGA2-MOPSO

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