Comprehensive Study Of Cascade Multilevel Inverters With Three Level Cells

Plakhtii, Oleksandr; Nerubatskyi, Volodymyr; Khomenko, Igor; Tsybulnyk, Vladyslav; Syniavskyi, Andrii

doi:10.1109/ess50319.2020.9160258

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…The masses and the inertia moments of the carrying struc tures of a boxcar with the design and actual dimensions were found through their spatial models built in the SolidWorks software [13]. With standard options from the software suite [14] it was found that the mass of the carrying structure of a boxcar with the nominal dimensions was 15.3 t, the inertial moment -320.8 t ⋅ m 2 , and of a boxcar with the actual dimen sions -12.7 t and 265.6 t ⋅ m 2 , respectively (Fig. 5).…”

Section: Introductionmentioning

confidence: 99%

Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies

Fomin¹,

Lovska²

2020

Nauk. visn. nat. hirn. univ.

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Purpose. To determine the basic dynamic characteristics of a standard Ukrainian boxcar with the Y25 bogie by means of the mathematic modelling of dynamic loads in the vertical plane and to compare them with the dynamic characteristics obtained for a boxcar with the 18100 bogie. It can be used for substantiation of application of the Y25 bogie as more promising, which can improve the operational efficiency of rail transportation and foster integration of the Ukrainian transport system into the European transportation complex. Methodology. The authors used the mathematical modelling of a boxcar with the Y25 bogie. The research was made in the vertical plane. It was taken into account that an empty car passed over a joint irregularity. The research was made for an 11217boxcar as a predominant type to be used. The authors studied the motion of a car on the 18100 and Y25 bogies. The basic dynamic characteristics were determined for a boxcar with the nominal (design) dimensions of the carrying elements and a boxcar with the actual dimensions (after a long service life) on the basis of the field tests. The differential equations were solved by theRungeKutta method in MathCad software suite. The initial displacements and the speeds were taken equal to zero. The following dynamic characteristics of a boxcar were obtained: acceleration of the body in the center of mass, acceleration of the body in the areas of support on the bogies, forces in the spring suspension of the bogie, and dynamic coefficients of the bogies. Findings. The theoretical research showed that the basic dynamic characteristics of a boxcar with the nominal dimensions were improved by 3851% in comparison to a similar one with the 18100 bogie, and for a boxcar with the actual dimensions the dynamic characteristics were improved by 4350%. Originality. The authors substantiated the application of the Y25 bogie for a standard Ukrainian boxcar with the nominal and actual dimensions of the carrying elements by means of the mathematical modelling of the dynamic loads in the vertical plane. Practical value. Due to lower dynamic loads on the carrying structures of freight cars with the Y25 bogie, it is possible to improve the dynamic characteristics of the structures under the operational modes, to increase the fatigue strength and the operational resource, to decrease the total repair and maintenance costs, to ensure better security and reliability of freight transportation through lower loads on both carrying structures and lashing devices, to increase the speed of freight delivery thanks to better dynamic characteristics of cars, to improve the traffic security, and so on.

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Section: Introductionmentioning

confidence: 99%

Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies

Fomin¹,

Lovska²

2020

Nauk. visn. nat. hirn. univ.

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“…The special feature of the organization of the power transmission systems in this case is the combination of the ACside convert ers or the DCside arrays of PV modules and the use of a net work transformer for galvanic isolation of the 380 V and 6 (10) kV networks [2]. An alternative is a power plant design combining arrays of singlephase alternating current photo voltaic modules [6,7], allowing for high output voltage quality [8,9]. This principle underlies many forwardlooking topolo gies [10,11], including those with an asymmetric structure [12], one of which is the use of a highvoltage multilayer cas cade converter without a network transformer (Fig.…”

Section: Introductionmentioning

confidence: 99%

Simulation of industrial solar photovoltaic station with transformerless converter system

Tugay¹,

Korneliuk²,

Shkurpela³

et al. 2020

Nauk. visn. nat. hirn. univ.

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Purpose. Creation of a detailed model of a solar photovoltaic station with a converter system based on a cascaded multi-level inverter with the MPPT (maximum power point tracker) function to investigate its operating modes in distributed power systems. Methodology. To carry out the research, the paper used the methods of system synthesis, mathematical and computer modeling to create photovoltaic station models and components; a physical experiment in obtaining thermal characteristics of the photovoltaic module Solarday SDM72360 W; modern power theories for synthesis of the vector control system of a multi-level inverter. Findings. the Matlab-model of solar photovoltaic station with transformerless 29-level cascade voltage inverter is synthesized. The model confirmed the serviceability and efficiency of the converter system and the power plant as a whole. An algorithm is proposed and an MPP tracker with volt-ampere characteristics of the photovoltaic module, which corresponds to the maximum power extraction, is synthesized on the basis of the algorithm. The algorithm was validated by the model for any solar radiation intensity. Originality. The total mathematical model of the photoelectric module, which accounts for its energy and heat characteristics, is obtained and can be used for simulating the operation of any computer model of the photoelectric converter under Matlab/Simulink/SimPowerSystems environment. Practical value. The model results indicate the prospects of industrial implementation of transformerless multi-level converter systems to be used in the structure of powerful solar photovoltaic stations.

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Reliability assessment of photovoltaic quasi Z-source inverter through stochastic modeling

Rexy,

Seyezhai,

Umarani

et al. 2024

Electr Eng

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Comprehensive Study Of Cascade Multilevel Inverters With Three Level Cells

Cited by 8 publications

References 36 publications

Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies

Determination of vertical dynamics for a standard Ukrainian boxcar with Y25 bogies

Simulation of industrial solar photovoltaic station with transformerless converter system

Reliability assessment of photovoltaic quasi Z-source inverter through stochastic modeling

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