Issues of Power Quality in Electrical Systems

Johnson, Daniel Ogheneovo

doi:10.11648/j.ijepe.20160504.12

Cited by 55 publications

(11 citation statements)

References 2 publications

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“…Power Quality concerns have many kinds of effects, causes and solutions that may be utilized power to enhance quality and their tool performance. Table 1 discusses the definitions, causes, and impacts of several issues such as voltage sag/swell, transients, voltage flicker, harmonics, voltage fluctuation, noise, voltage spikes, voltage imbalance and power frequency variation [19][20][21][22][23][24][25][26][27][28][29][30]. Table 1.…”

Section: Issues Of Power Qualitymentioning

confidence: 99%

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

Shah,

Ullah,

Nouman

et al. 2024

Eng. Res. Express

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The state-of-the-art dynamic voltage restorers (DVRs) have advanced significantly in recent years. Modern DVRs can detect voltage sags or dips on the power line in real-time and are able to rapidly inject a compensating voltage to maintain a constant voltage at the load. This helps to improve the power quality of the electrical distribution system and to protect sensitive electronic equipment from voltage fluctuations. One key development in the field of DVRs has been the use of advanced control algorithms that enable the DVR to track the voltage more accurately on the power line and to inject a compensating voltage more accurately. These algorithms can be implemented using digital signal processors (DSPs) or field-programmable gate arrays (FPGAs), which allow for fast and precise control of the DVR. Another important development has been the use of high-frequency inverters in DVRs. These inverters can operate at much higher frequencies than traditional inverters, which allows them to switch on and off more quickly and to inject a more precise compensating voltage. This can help to further improve the power quality of the electrical distribution system. Overall, the state-of-the-art DVR technology continues to evolve, and new advances are being made all the time to improve the performance and reliability of these devices.

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Section: Issues Of Power Qualitymentioning

confidence: 99%

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

Shah,

Ullah,

Nouman

et al. 2024

Eng. Res. Express

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“…The authors in [42] presented only a comprehensive review linking the smart grid (SG) to solar energy to assess the contained harmonics and did not provide any options for the PQ problems. The author of [43] addressed only the harmonics of the UPQC system and did not provide a detailed design or investigation of the issue. The author only reviewed some PQ problems in his review articles [44][45][46].…”

Section: B Literature Overviewmentioning

confidence: 99%

“…7: If (P ≥ 0.5), keep posted about the site of the present search by the next equation: X ' (t + 1) = D ' e bl cos(2πl) + X * (t) (43) 8: If any agent goes beyond the search space and amends it, calculate the fitness of each search, and update X* if there is a better solution t = t + 1. 9: Choose the new X*.…”

Section: Application Of Fopic With Woa Techniquementioning

confidence: 99%

Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids

Mahmoud

Atia²,

Esmail

et al. 2023

Axioms

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In recent modern power systems, the number of renewable energy systems (RESs) and nonlinear loads have become more prevalent. When these systems are connected to the electricity grid, they may face new difficulties and issues such as harmonics and non-standard voltage. The proposed study suggests the application of a whale optimization algorithm (WOA) based on a fractional-order proportional-integral controller (FOPIC) for unified power quality conditioner (UPQC) and STATCOM tools. These operate best with the help of their improved control system, to increase the system’s reliability and fast dynamic response, and to decrease the total harmonic distortion (THD) for enhancing the power quality (PQ). In this article, three different configurations are studied and assessed, namely: (C1) WOA-based FOPIC for UPQC, (C2) WOA-based FOPIC for STATCOM, and (C3) system without FACTS, i.e., base case, to mitigate the mentioned drawbacks. C3 is also considered as a base case to highlight the main benefits of C1 and C2 in improving the PQ by reducing the %THD of the voltage and current system and improving the systems’ voltage waveforms. With C2, voltage fluctuation is decreased by 98%, but it nearly disappears in C1 during normal conditions. Additionally, during the fault period, voltage distortion is reduced by 95% and 100% with C2 and C1, respectively. Furthermore, when comparing C1 to C2 and C3 under regular conditions, the percentage reduction in THD is remarkable. In addition, C1 eliminates the need for voltage sag, and harmonic and current harmonic detectors, and it helps to streamline the control approach and boost control precision. The modeling and simulation of the prepared system are performed by MATLAB/Simulink. Finally, it can be concluded that the acquired results are very interesting and helpful in the recovery to the steady state of wind systems and nonlinear loads, thereby increasing their grid connection capabilities.

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“…For further simplicity, the zero-phase sequence components in the 3-phase voltage and current are ignored. The coordinates of the space vectors are converted to α-β coordinates using ( 6) and (7).…”

Section: Modelling Of Shunt Active Power Filtermentioning

confidence: 99%

Design of Intelligent Filtering Mechanism using SAF for Industrial Power Quality Perturbations

Shrivastava,

Kodnani

et al. 2023

Preprint

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This paper presents a smart switching mechanism to optimize and control of industrial shunt active power filters. The aim is to design a low-cost shunt active filter with a reliable switching mechanism that integrates to industrial loads at the point of common coupling. Traditionally, the shunt active power filter is linked to all of the system's loads. The size and capacity of the shunt active filter can be decreased by connecting fewer loads. In industries, some loads don't contribute much to harmonic distortion and maybe overlooked while compensating for it. The smart switching mechanism has been used to categorise necessary loads based on two constraints: individual load THD and shunt active filter peak current at a particular instance. This switching mechanism is implemented using the classification learner application in Matlab. Smart switching connects the appropriate loads to the shunt active power filter automatically. The shunt active filter is optimized using Fuzzy Logic-DC voltage control. The Matlab/ Simulink simulation model was developed to test the effectiveness of the above-mentioned strategy.

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Issues of Power Quality in Electrical Systems

Cited by 55 publications

References 2 publications

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

A review on the state of the art of dynamic voltage restorer: topologies, operational modes, compensation methods, and control algorithms

Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids

Design of Intelligent Filtering Mechanism using SAF for Industrial Power Quality Perturbations

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