Application of Matrix VFD for Power Factor Improvement in LED Lighting Sources Loaded Power Distribution Lines

Petrauskas, Gytis; Svinkunas, Gytis

doi:10.3390/en14123546

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…Some utility companies impose penalties or additional charges for low power factor, as it can cause additional strain on their distribution infrastructure. By improving the power factor, businesses can avoid these penalties and charges (Bakalos, 2020;Dimitrova & Zlatev, 2020;Maurya et al, 2020;Petrauskas & Svinkunas, 2021, Petrauskas & Svinkunas,2022.…”

Section: Literature Reviewmentioning

confidence: 99%

Power factor correction for energy efficient at public hospital of Manokwari

Panggei,

Pasalli,

Paisey

et al. 2023

JIMESE

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The power factor grades are an indicator to determine the effectiveness of the electric power either distributed or used by consumers. A high power factor indicates that the electrical loads are using energy efficiently. Due to the increase in inductive load, there will be a decrease in the power factor, which in turn affects the distribution of electrical energy. In this research, an investigation has been carried out to observe the background that influences the low power factor at public hospital (RSUD) of Manokwari and recommend the need for a basis for improving the power factor at the hospital. Primary data on lighting and electrical equipment, along with their respective electric power capacities and power factors, are collected and measured onsite. Then the data is analysed based on the theoretical basis of power factor improvement. Based on the investigation, there are two focus points in the hospital to be observed, i.e., motor pumps and total load at the main panel. The calculation results show that pump motors 2 and 3 need to be compensated by increasing the power factor to 0.9 so that reactive power is reduced to 1.42 kVAR and 1.24 kVAR, respectively. In the same way, apparent power can also be upgraded to 0.85 kVA and 1.46 kVA by installing bank capacitors of 30.35 mF and 26.63 mF, respectively. On the other hand, the largest load connected to the main panel needs to be corrected to reduce the reactive power and apparent power to 17.86 kVAR and 9.5 kVA through the installation of a capacitor bank of 387.75 mF. This correction will increase energy efficiency while gaining economic benefits on both electricity bills and waiving penalties.

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Section: Literature Reviewmentioning

confidence: 99%

Power factor correction for energy efficient at public hospital of Manokwari

Panggei,

Pasalli,

Paisey

et al. 2023

JIMESE

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“…The reactive power of such equipment directly depends on the voltage at the power distribution line connection point and the current of the diode rectifier (Figure 2). The input current of the AC-DC device, due to the large number of harmonics, is quite complex and can be described by the following Equation (1) [7]:…”

Section: Theoratical Analysis Of the Reactive Power Generated By Diod...mentioning

confidence: 99%

“…The motor stator winding voltage and PDL current are formed from two certain sector vectors. The frequency of MC motor supply voltage is determined by the angle Q SC , and the current displacement at the connection to the PDL point is determined by the angle Q SV [7].…”

Section: Special Features Of the Ac-ac Matrix Vfdmentioning

confidence: 99%

“…The authors of [6] suggested the use of a permanent magnet machine powered by a MC as the compensation device. The authors of [7] proposed to connect the AC-AC matrix VFD to the PDL, thus compensating for the reactive power produced by light-emitting diode light sources. The authors of [8] proposed using an MC in combination with a transformer for power factor control.…”

Section: Introductionmentioning

confidence: 99%

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Application of Novel AC–AC Matrix VFD for Power Factor Improvement in Conventional AC–DC–AC VFD-Loaded Power Distribution Lines

et al. 2022

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In this study, an innovative approach to matrix-converter-based AC–AC variable frequency drives (VFDs) is introduced. The possibility of using AC–AC matrix VFDs for reactive power compensation in conventional AC–DC–AC VFD-loaded power distribution lines is investigated. It is found that the interaction of a large number of conventional AC–DC–AC VFDs with a conventional capacitor-based local compensation device leads to overcompensation in 0.4 kV power distribution lines. This is due to the fact that the conventional compensation device is designed to compensate the lagging reactive power produced by inductive loads, such as AC motors. This highlights the demand for the compensation of leading reactive power that is not predicted by the designer. To solve this problem, the modification of a certain number of previously installed VFDs by replacing their conventional AC–DC–AC converters with AC–AC matrix converters is proposed. This can lead to improvements in the power factor in 0.4 kV power distribution lines. In this study, the range of reactive power produced by conventional AC–DC–AC VFDs was determined mathematically, by simulation, and experimentally. The range of reactive power produced by the novel AC–AC matrix VFD was also determined. On that basis, the number of VFDs to be modified is defined to keep the power factor close to unity.

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“…. , +8, +9) [5]. The MC is a forced commutated converter that consists of nine bidirectional switches as the power elements to create a variable output voltage system.…”

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confidence: 99%

Switching Ripple Harmonics Attenuation in DFIG and Matrix Converter-Based WECS

Svinkunas

Petrauskas

2021

Electronics

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The analysis presented in this paper is focused on the harmonics distortion damping in the case of bidirectional power-flow of the electronics device—matrix converter as an interface between two power sources. Bidirectional energy flow takes place in the matrix converter that is used in renewables, hybrid transformers, microgrids, etc. It is observed that the matrix converter generates sinusoidal voltage with some amount of harmonic distortion and worsens in the quality of power in the utility grid. Taking into account the bi-directional energy flow and the matrix converter operation principle, four key requirements for the filters are formulated. Six theoretically possible filter topologies are investigated for compliance with these requirements. Two of the filter topologies are recognized as complying with these requirements and applicable for the switching ripple harmonics damping in the utility grid connected matrix converter in the case of bidirectional power flow. The suitability of these topologies was verified by MATLAB/Simulink simulation. Using the proper filter topology will significantly reduce the size, weight and cost of the components of the filter, as well as the utility grid’s pollution by switching ripple harmonics. It is appropriate to apply such filters to matrix converters that operate in wind turbines installed in doubly fed induction generators. These filters should also be used in hybrid transformers and other high-power devices with matrix converters.

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Application of Matrix VFD for Power Factor Improvement in LED Lighting Sources Loaded Power Distribution Lines

Cited by 6 publications

References 10 publications

Power factor correction for energy efficient at public hospital of Manokwari

Power factor correction for energy efficient at public hospital of Manokwari

Application of Novel AC–AC Matrix VFD for Power Factor Improvement in Conventional AC–DC–AC VFD-Loaded Power Distribution Lines

Switching Ripple Harmonics Attenuation in DFIG and Matrix Converter-Based WECS

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