Roman Gorbunov - Academia.edu (original) (raw)
Papers by Roman Gorbunov
Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov, 2014
Актуальность работы обусловлена необходимостью создания силовых электронных преобразователей трёх... more Актуальность работы обусловлена необходимостью создания силовых электронных преобразователей трёхфазного напряжения с высокими энергетическими показателями и улучшенной электромагнитной совместимостью с сетью и двигателем, имеющих простую и надёжную систему управления и относительно низкую стоимость. Цель работы: исследование предложенного трёхфазного широтно импульсного преобразователя переменного напряжения, предназначенного для регулирования напряжения на статорных обмотках асинхронных двигателей с короткозамкнутым ротором. Методы исследования: методы теории сигналов и систем, преобразовательной техники, схемотехнического и численного мо делирования; экспериментальное исследование выполнялось на собранном макете преобразователя. Результаты: получены регулировочная характеристика преобразователя, выражение для расчёта коэффициента гармоник в кривой выходного напряжения, приведены результаты схемотехнического моделирования и экспериментального исследования преобразователя, выполнено их сопоставление. Ключевые слова: Широтно импульсный преобразователь переменного напряжения, регулирование напряжения, модуляция, ключ переменного тока, асинхронный двигатель.
2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia)
This paper proposes a modified droop-based frequency-selective impedance control (dFSIC) algorith... more This paper proposes a modified droop-based frequency-selective impedance control (dFSIC) algorithm for fully distributed decentralized controlled dc microgrids with current sharing between multiple interface power converters. Unfortunately, because of the extremely low output impedance of the converters under the conventional FSIC, current sharing is not satisfactory and dc microgrids might be unstable. The proposed algorithm solves these problems by adapting a droop-control strategy for the FSIC. As the result, improved algorithm extends the application of the FSIC in distributed power systems providing both steady-state voltage ripples suppression and load current sharing at the FSIC frequencies. The superior performance is demonstrated in time and frequency domains by the experiments.
2021 IEEE Fourth International Conference on DC Microgrids (ICDCM)
In this paper, an improved control strategy is proposed for droop-controlled dc power converters ... more In this paper, an improved control strategy is proposed for droop-controlled dc power converters to ensure maximally flat magnitude response of the converter’s output impedance within the voltage loop bandwidth with no impedance peaking at the cut-off frequency, resulting in the non-overshooting voltage transients under step-load change and minimizing the risk of source-to-load interactions. The first-order dynamics is provided by the proposed control strategy incorporating two independent load current feed-forward paths into the proportional and integral parts of the voltage loop PI-compensator in combination with the output capacitor’s current control. The adaptive current gain approach is developed to ensure low sensitivity of the control performance to the converter’s input and output voltage variations. The single-pole small-signal model of the power converter’s output impedance under the proposed droop-control strategy is developed. Simulations and experiments were conducted to validate the effectiveness of the proposed control strategy.
![Research paper thumbnail of IEEE IES/IAS/PELS Joint Russia (Siberia) Chapter Celebrates PELS Day 2021 [Society News]](https://attachments.academia-assets.com/90800125/thumbnails/1.jpg)
](IEEE Power Electronics Magazine, 2021
Grid Integration of Renewables" by Kaushik Basu (IISc Bangalore, India). The chapter also organiz... more Grid Integration of Renewables" by Kaushik Basu (IISc Bangalore, India). The chapter also organized a panel discussion about sustaina ble e n e r g y o p p o r t u n i t ie s o n 2 0 June 2021.
2021 IEEE 22nd International Conference of Young Professionals in Electron Devices and Materials (EDM), 2021
The resonant-type controllers are commonly used in dc microgrids in order to suppress the steady-... more The resonant-type controllers are commonly used in dc microgrids in order to suppress the steady-state ripples of a microgrid's dc bus voltage. As the resonant controllers are prone to cause instability issues and anomalous peaks in closed-loop frequency responses, it is of particular importance to investigate it thoroughly for the frequency-selective impedance controlled (FSIC) dc microgids, where the cascade of the resonant-type controllers is used in control of the interfacing power converters to reduce the bus's impedance at the selected frequencies. In this paper, based on the Nyquist plots analysis results, design of the FSIC resonant controllers is carried out and a step-by-step design procedure is proposed to ensure stability and no impedance peaking nearby the FSIC's frequencies. The proposed design is verified through the experiments.
2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
The paper introduces the design rules, that help to correlate dynamic characteristics of a power ... more The paper introduces the design rules, that help to correlate dynamic characteristics of a power converter with its power stage's parameters, thus simplifying the control loops' design and providing the necessary transient performance. The special attention is given to the output impedance of a voltage-source converter. The important goal of this research is to point out that the power stage itself defines boundary limits for dynamic characteristics of a switch-mode converter. It is shown, that many problems can be avoided if the dynamic properties of the power stage are properly established before the compensation design.
2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
In this article, control loop design for DC-DC boost converter is discussed. An analytical approa... more In this article, control loop design for DC-DC boost converter is discussed. An analytical approach to obtain coefficients of a compensator based on impedance requirements is given in a simple step-by-step manner. A design example and modeling are provided to confirm the correctness of the results.
Russian Electrical Engineering, 2016
This article presents the dependence of the power factor of an ac downconverter on the component ... more This article presents the dependence of the power factor of an ac downconverter on the component parameters of an input LC filter. The obtained results allow filter parameters to be selected at which the high power factor of a converter in operating control range is provided. Analysis was carried out for the pulse-width algorithm of regulation of the voltage and load at which an induction electric motor was used. Results of analysis were confirmed by computer simulation and experiments.
2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
The paper presents a novel technique for designing a two-loop digital automatic control system fo... more The paper presents a novel technique for designing a two-loop digital automatic control system for a DC-DC boost converter. The method allows calculating the compensator coefficients in the inner and outer closed-loop transfer functions of the automatic control system in accordance with the requirements to the output impedance and including the delays in the control route.
2017 18th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM)
This paper presents the detailed analysis of the AC Buck converter's power losses in order to... more This paper presents the detailed analysis of the AC Buck converter's power losses in order to emphasize the main problems towards high power conversion efficiency. The conduction losses and the switching losses of the switching block are considered. The most influential parameters of the system are identified and favorable operation conditions are determined. The efficiency of the experimental prototype with the particular squirrel-cage induction motor is measured.
2019 20th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2019
The paper presents experimental verification of the previously proposed power converter’s voltage... more The paper presents experimental verification of the previously proposed power converter’s voltage loop design approach based on output impedance control. According to this approach the maximum value of the output impedance can be adjusted by setting the voltage loop bandwidth. The approach is confirmed by measurements of output impedance of two boost converter topologies at different crossover frequencies. During experiments the second (minor) peak was observed. The theoretical explanation of this minor peak is given in this paper.
The paper presents the developed digital control system with an adaptive feedback loop for AC mot... more The paper presents the developed digital control system with an adaptive feedback loop for AC motor PWM drive which allows one to keep stable closed loop performance of the drive while the PWM frequency can be changed. The adaptation of the drive's dynamic characteristics is implemented by changing parameters of the compensators and the digital filters. The experimental and simulation results for 9 kW high-speed drive confirm stable control loop performance with nearly equal frequency and time responses at both simulated PWM frequencies.
2017 18th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2017
This paper presents the benefits of the AC Buck voltage converter in comparison with the traditio... more This paper presents the benefits of the AC Buck voltage converter in comparison with the traditional SCR-based voltage converter in the induction drive's energy-saving application. The particular squirrel-cage induction motor is considered. The Power Factor, the Displacement Power Factor and the currents' Total Harmonic Distortion are analyzed and compared.
This paper presents the results of an accuracy estimation of the previously proposed simplified m... more This paper presents the results of an accuracy estimation of the previously proposed simplified mathematical model for harmonic distortion analysis in AC Buck converter. The experiment is performed using the designed prototype of the power converter with an induction motor. The results of the experiment are processed in Matlab in compliance with the digital signals processing theory. An accuracy of the proposed model is compared with an accuracy provided by the complex model based computer simulation. As the result the model is highly recommended to be used in various engineering tasks.
2021 IEEE 22nd International Conference of Young Professionals in Electron Devices and Materials (EDM)
An output impedance of source converters becomes crucial for the stability of a modern power syst... more An output impedance of source converters becomes crucial for the stability of a modern power system due to presence of a large number of power converters. In the case of a hybrid power system, not only DC-DC converters but also a grid interface converter must have a limited output impedance at the DC-side. In this paper, the authors implement an output impedance limiting approach for compensators coefficient calculation of a three-phase six switch grid interface converter control system. The mathematical analysis of the converter output impedance is presented and optimal conditions of compensators coefficients for current and voltage loops are obtained. Matlab/Simulink modeling is provided to prove the correctness of the obtained results.
2020 International Ural Conference on Electrical Power Engineering (UralCon)
In this paper a novel impedance control technique is developed. The technique is aimed to suppres... more In this paper a novel impedance control technique is developed. The technique is aimed to suppress the steady-state ripples of a micro grid's DC-bus voltage, caused by load's current harmonics. The effect is achieved by lowering the bus impedance at the selected frequencies, that correspond to the frequency spectrum of the loads. The frequency-selective impedance control (FSIC) is implemented by increase of the voltage-loop gain at the specified frequencies using the cascade of the resonance-type controllers (R-controllers). The R-controllers are tuned to the parameters of the distortion. Since the oscillation frequency of the R-controller isn't restricted by the voltage-loop's bandwidth, the control capabilities of a power converter are extended up to its Nyquist frequency. An approach to configure the R-controllers is developed. The effectiveness of the technique is proved by the experiments at the DC micro grid prototype. The experiments demonstrate a significant reduction of the bus voltage ripples under the FSIC.
![Research paper thumbnail of IEEE PELS Novosibirsk SBC Conducts SCPES [Society News]](https://attachments.academia-assets.com/78271108/thumbnails/1.jpg)
](IEEE Power Electronics Magazine
Известия высших учебных заведений. Электромеханика
2015 16th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, 2015
This paper presents the software application for power losses and temperature modeling of AC Buck... more This paper presents the software application for power losses and temperature modeling of AC Buck converters. The application provides modeling different three-phase power circuits of AC Buck converters with several load types. The theoretical models are described in details. The experimental verification of modeling results is performed.
Izvestiya Tomskogo Politekhnicheskogo Universiteta Inziniring Georesursov, 2014
Актуальность работы обусловлена необходимостью создания силовых электронных преобразователей трёх... more Актуальность работы обусловлена необходимостью создания силовых электронных преобразователей трёхфазного напряжения с высокими энергетическими показателями и улучшенной электромагнитной совместимостью с сетью и двигателем, имеющих простую и надёжную систему управления и относительно низкую стоимость. Цель работы: исследование предложенного трёхфазного широтно импульсного преобразователя переменного напряжения, предназначенного для регулирования напряжения на статорных обмотках асинхронных двигателей с короткозамкнутым ротором. Методы исследования: методы теории сигналов и систем, преобразовательной техники, схемотехнического и численного мо делирования; экспериментальное исследование выполнялось на собранном макете преобразователя. Результаты: получены регулировочная характеристика преобразователя, выражение для расчёта коэффициента гармоник в кривой выходного напряжения, приведены результаты схемотехнического моделирования и экспериментального исследования преобразователя, выполнено их сопоставление. Ключевые слова: Широтно импульсный преобразователь переменного напряжения, регулирование напряжения, модуляция, ключ переменного тока, асинхронный двигатель.
2021 IEEE 12th Energy Conversion Congress & Exposition - Asia (ECCE-Asia)
This paper proposes a modified droop-based frequency-selective impedance control (dFSIC) algorith... more This paper proposes a modified droop-based frequency-selective impedance control (dFSIC) algorithm for fully distributed decentralized controlled dc microgrids with current sharing between multiple interface power converters. Unfortunately, because of the extremely low output impedance of the converters under the conventional FSIC, current sharing is not satisfactory and dc microgrids might be unstable. The proposed algorithm solves these problems by adapting a droop-control strategy for the FSIC. As the result, improved algorithm extends the application of the FSIC in distributed power systems providing both steady-state voltage ripples suppression and load current sharing at the FSIC frequencies. The superior performance is demonstrated in time and frequency domains by the experiments.
2021 IEEE Fourth International Conference on DC Microgrids (ICDCM)
In this paper, an improved control strategy is proposed for droop-controlled dc power converters ... more In this paper, an improved control strategy is proposed for droop-controlled dc power converters to ensure maximally flat magnitude response of the converter’s output impedance within the voltage loop bandwidth with no impedance peaking at the cut-off frequency, resulting in the non-overshooting voltage transients under step-load change and minimizing the risk of source-to-load interactions. The first-order dynamics is provided by the proposed control strategy incorporating two independent load current feed-forward paths into the proportional and integral parts of the voltage loop PI-compensator in combination with the output capacitor’s current control. The adaptive current gain approach is developed to ensure low sensitivity of the control performance to the converter’s input and output voltage variations. The single-pole small-signal model of the power converter’s output impedance under the proposed droop-control strategy is developed. Simulations and experiments were conducted to validate the effectiveness of the proposed control strategy.
IEEE Power Electronics Magazine, 2021
Grid Integration of Renewables" by Kaushik Basu (IISc Bangalore, India). The chapter also organiz... more Grid Integration of Renewables" by Kaushik Basu (IISc Bangalore, India). The chapter also organized a panel discussion about sustaina ble e n e r g y o p p o r t u n i t ie s o n 2 0 June 2021.
2021 IEEE 22nd International Conference of Young Professionals in Electron Devices and Materials (EDM), 2021
The resonant-type controllers are commonly used in dc microgrids in order to suppress the steady-... more The resonant-type controllers are commonly used in dc microgrids in order to suppress the steady-state ripples of a microgrid's dc bus voltage. As the resonant controllers are prone to cause instability issues and anomalous peaks in closed-loop frequency responses, it is of particular importance to investigate it thoroughly for the frequency-selective impedance controlled (FSIC) dc microgids, where the cascade of the resonant-type controllers is used in control of the interfacing power converters to reduce the bus's impedance at the selected frequencies. In this paper, based on the Nyquist plots analysis results, design of the FSIC resonant controllers is carried out and a step-by-step design procedure is proposed to ensure stability and no impedance peaking nearby the FSIC's frequencies. The proposed design is verified through the experiments.
2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
The paper introduces the design rules, that help to correlate dynamic characteristics of a power ... more The paper introduces the design rules, that help to correlate dynamic characteristics of a power converter with its power stage's parameters, thus simplifying the control loops' design and providing the necessary transient performance. The special attention is given to the output impedance of a voltage-source converter. The important goal of this research is to point out that the power stage itself defines boundary limits for dynamic characteristics of a switch-mode converter. It is shown, that many problems can be avoided if the dynamic properties of the power stage are properly established before the compensation design.
2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
In this article, control loop design for DC-DC boost converter is discussed. An analytical approa... more In this article, control loop design for DC-DC boost converter is discussed. An analytical approach to obtain coefficients of a compensator based on impedance requirements is given in a simple step-by-step manner. A design example and modeling are provided to confirm the correctness of the results.
Russian Electrical Engineering, 2016
This article presents the dependence of the power factor of an ac downconverter on the component ... more This article presents the dependence of the power factor of an ac downconverter on the component parameters of an input LC filter. The obtained results allow filter parameters to be selected at which the high power factor of a converter in operating control range is provided. Analysis was carried out for the pulse-width algorithm of regulation of the voltage and load at which an induction electric motor was used. Results of analysis were confirmed by computer simulation and experiments.
2018 19th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2018
The paper presents a novel technique for designing a two-loop digital automatic control system fo... more The paper presents a novel technique for designing a two-loop digital automatic control system for a DC-DC boost converter. The method allows calculating the compensator coefficients in the inner and outer closed-loop transfer functions of the automatic control system in accordance with the requirements to the output impedance and including the delays in the control route.
2017 18th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM)
This paper presents the detailed analysis of the AC Buck converter's power losses in order to... more This paper presents the detailed analysis of the AC Buck converter's power losses in order to emphasize the main problems towards high power conversion efficiency. The conduction losses and the switching losses of the switching block are considered. The most influential parameters of the system are identified and favorable operation conditions are determined. The efficiency of the experimental prototype with the particular squirrel-cage induction motor is measured.
2019 20th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2019
The paper presents experimental verification of the previously proposed power converter’s voltage... more The paper presents experimental verification of the previously proposed power converter’s voltage loop design approach based on output impedance control. According to this approach the maximum value of the output impedance can be adjusted by setting the voltage loop bandwidth. The approach is confirmed by measurements of output impedance of two boost converter topologies at different crossover frequencies. During experiments the second (minor) peak was observed. The theoretical explanation of this minor peak is given in this paper.
The paper presents the developed digital control system with an adaptive feedback loop for AC mot... more The paper presents the developed digital control system with an adaptive feedback loop for AC motor PWM drive which allows one to keep stable closed loop performance of the drive while the PWM frequency can be changed. The adaptation of the drive's dynamic characteristics is implemented by changing parameters of the compensators and the digital filters. The experimental and simulation results for 9 kW high-speed drive confirm stable control loop performance with nearly equal frequency and time responses at both simulated PWM frequencies.
2017 18th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM), 2017
This paper presents the benefits of the AC Buck voltage converter in comparison with the traditio... more This paper presents the benefits of the AC Buck voltage converter in comparison with the traditional SCR-based voltage converter in the induction drive's energy-saving application. The particular squirrel-cage induction motor is considered. The Power Factor, the Displacement Power Factor and the currents' Total Harmonic Distortion are analyzed and compared.
This paper presents the results of an accuracy estimation of the previously proposed simplified m... more This paper presents the results of an accuracy estimation of the previously proposed simplified mathematical model for harmonic distortion analysis in AC Buck converter. The experiment is performed using the designed prototype of the power converter with an induction motor. The results of the experiment are processed in Matlab in compliance with the digital signals processing theory. An accuracy of the proposed model is compared with an accuracy provided by the complex model based computer simulation. As the result the model is highly recommended to be used in various engineering tasks.
2021 IEEE 22nd International Conference of Young Professionals in Electron Devices and Materials (EDM)
An output impedance of source converters becomes crucial for the stability of a modern power syst... more An output impedance of source converters becomes crucial for the stability of a modern power system due to presence of a large number of power converters. In the case of a hybrid power system, not only DC-DC converters but also a grid interface converter must have a limited output impedance at the DC-side. In this paper, the authors implement an output impedance limiting approach for compensators coefficient calculation of a three-phase six switch grid interface converter control system. The mathematical analysis of the converter output impedance is presented and optimal conditions of compensators coefficients for current and voltage loops are obtained. Matlab/Simulink modeling is provided to prove the correctness of the obtained results.
2020 International Ural Conference on Electrical Power Engineering (UralCon)
In this paper a novel impedance control technique is developed. The technique is aimed to suppres... more In this paper a novel impedance control technique is developed. The technique is aimed to suppress the steady-state ripples of a micro grid's DC-bus voltage, caused by load's current harmonics. The effect is achieved by lowering the bus impedance at the selected frequencies, that correspond to the frequency spectrum of the loads. The frequency-selective impedance control (FSIC) is implemented by increase of the voltage-loop gain at the specified frequencies using the cascade of the resonance-type controllers (R-controllers). The R-controllers are tuned to the parameters of the distortion. Since the oscillation frequency of the R-controller isn't restricted by the voltage-loop's bandwidth, the control capabilities of a power converter are extended up to its Nyquist frequency. An approach to configure the R-controllers is developed. The effectiveness of the technique is proved by the experiments at the DC micro grid prototype. The experiments demonstrate a significant reduction of the bus voltage ripples under the FSIC.
IEEE Power Electronics Magazine
Известия высших учебных заведений. Электромеханика
2015 16th International Conference of Young Specialists on Micro/Nanotechnologies and Electron Devices, 2015
This paper presents the software application for power losses and temperature modeling of AC Buck... more This paper presents the software application for power losses and temperature modeling of AC Buck converters. The application provides modeling different three-phase power circuits of AC Buck converters with several load types. The theoretical models are described in details. The experimental verification of modeling results is performed.