Full Soft Switching Dual DC/DC Converter With Four-Quadrant Switch for Systems With Battery Energy Storage System

Sokol, Yevgen; Ivakhno, Volodymyr; Zamaruiev, Volodymyr; Styslo, Bohdan

doi:10.1109/ieps.2018.8559490

Cited by 13 publications

(2 citation statements)

References 14 publications

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“…Однак, їх застосування в системах електроживлення вимагає використання спеціалізованих енергоефективних перетворювачів електричної енергії: узгоджуючих -що забезпечують зв'язок між БСНЕ і мережею [1] та сервісних -що забезпечують безпечний режим роботи накопичувачів (вирівнювання рівнів напруги на послідовно з'єднаних акумуляторах, контроль за дотриманням граничних значень рівнів напруги на кожному з акумуляторів БСНЕ) [2]. Відомо, що акумуляторні батареї на основі літію мають ряд переваг над свинцево-кислотними, але вимагають більш жорсткого дотримання напруги на одиничному акумуляторі.…”

Section: останнімunclassified

Analysis of Batteries Active Balance Schemes Efficiency

Styslo¹,

Зайцев²,

Minakova³

et al. 2021

Вісник НТУ "ХПІ"

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The paper reviews the existing circuit solutions of devices for balancing electric batteries. The balancing principle on the basis of capacitive and inductive buffer elements has been described. It was shown the features of their work and the basic calculations for each device type. For circuits with transformer topology, the calculated values for determining the balancing current are indicated. Based on the circuit solutions analysis, the efficiency of using solutions based on inductive buffer elements is numerically determined and proved. Powerful batteries for power supply systems are used in the form of stacks, consisting of a series-parallel connection of single cells. During their operation, there is a problem of uneven discharge or charge, to compensate which it is necessary to make voltage levels balancing in the stack batteries. For safely using electrochemical batteries the using of specialized balancing devices is required. The most efficient, from an energy point of view, are active balancing systems. The analysis of the mathematical model of two types (capacitive and inductive) buffer elements operation allowed to give a qualitative assessment of their efficiency. The first, in comparison with inductive - not only have worse energy characteristics, but also do not allow to perform "scaling" of the device without significant complication of the control system. The current amplitude value in circuits with a capacitive buffer element is limited only by the internal parasitic resistances of the circuit elements, therefore, with a relatively large value of imbalance, in circuit elements (including batteries) takes place a significant energy loss in the form of heat which negatively effects on rechargeable battery parameters. The current amplitude value in the circuit based on inductive buffer elements is limited by the inductance value. It can be calculated at the device design stage. In addition, providing the control system with intermittent converter operation allows to reduce switching losses in the circuit power switches and increases the overall operation efficiency. With a large number of batteries (more than three) should be preferred transformer balancing systems, as a special case of inductive topology.

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Section: останнімunclassified

Analysis of Batteries Active Balance Schemes Efficiency

Styslo¹,

Зайцев²,

Minakova³

et al. 2021

Вісник НТУ "ХПІ"

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“…The disadvantage of cascaded voltage inverters is the need for a large number of galvanically isolated DC sources. In addition, the implementation of this circuit requires an increased number of power transistors [17,18], which increases the cost of this system.…”

Section: Introductionmentioning

confidence: 99%

A method for calculating the parameters of the sine filter of the frequency converter, taking into account the criterion of starting current limitation and pulse-width modulation frequency

Nerubatskyi

Plakhtii

Hordiienko

et al. 2021

EEJET

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An analysis of the method for ensuring the sinusoidality of the output voltage in power generation systems with self-commutated voltage inverters under the requirements of the international standard IEEE-519 is presented. In a number of programs, especially low-power generation systems, a low-cost solution is needed to provide the sinusoidal waveform of the output voltage with the total harmonic distortion of 5 %. This solution is to use two-level voltage inverters with an output sine LC filter. However, the feature of the sine filter with the frequency converter is that the PWM frequency affects the spectrum of higher harmonics of the output voltage. In addition, there is the starting current of the filter capacitor, which can disable the power switches of the voltage inverter. The developed method for calculating the values of the LC filter with the two-level voltage inverter in the PWM mode is presented meeting the requirements of the international standard IEEE-519, taking into account the modulation frequency and limitation of the starting current of the filter capacitor. To confirm the required quality of the output voltage of the two-level voltage inverter with the sine filter, an appropriate simulation model was created in the Matlab/Simulink computer simulation environment. The oscillograms and harmonic analysis of the input and output voltages of the sine filter, which showed the total harmonic distortion of 1.88 %, are presented. A physical prototype of the investigated system was created on the basis of a 5.5 kW OVEN PChV203-5K5-V frequency converter (Ukraine). Using the SIGLENT SDS1104X-E oscilloscope (China), the real waveform and the results of the harmonic analysis of the sine filter output voltage, confirming the implementation of the necessary sinusoidality criteria, were obtained

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