EPE Association: EPE 2018 - DS1d: Advanced Power Converter Topologies I

EPE 2018 - DS1d: Advanced Power Converter Topologies I
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2018 ECCE Europe - Conference > EPE 2018 - Topic 02: Power Converter Topologies and Design > EPE 2018 - DS1d: Advanced Power Converter Topologies I

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   A 50 kW Power Hardware-in-the-Loop Test Bench for Permanent Magnet Synchronous Machines based on a Modular Multilevel Converter
By Mathias SCHNARRENBERGER [View]
[Download]

Abstract: This paper presents a power hardware-in-the-loop (PHIL) test bench for the emulation of highly utilized permanent magnet synchronous machines based on a square-wave powered Modular Multilevel Converter (SPMMC). Comparisons of the measurement results between an automotive machine and the PHIL during steady state operation and high dynamic current steps are done to show the performance of the PHIL test bench.

   A Novel Modular DC-DC Converter Based on High-Frequency-Link for MVDC Distribution Application
By Cong ZHAO [View]
[Download]

Abstract: In this paper, a novel modular dc-dc converter (MDCC) based on high-frequency-link (HFL) is proposed for MVDC distribution application. The proposed MDCC employs series-connected submodules (SMs) in the MVDC side, and single active bridges (SABs) in parallel in the low voltage dc (LVDC) side. Besides, the MDCC can be operated as a dc breaker when dc short circuit faults occur in the MV side. In addition, the operation principle of SMs and the power transmission characterization of HFL are analyzed, based on which a control method for the MDCC is presented. Finally, simulation results verify the effectiveness of the proposed MDCC and the control method.

   A Single-Phase Direct AC-AC Modular Multilevel Converter for Railway Power Conditioning
By Ming LEI [View]
[Download]

Abstract: This paper proposes a single-phase direct ac-ac modular multilevel converter (MMC) with the capability of equal frequency operation for railway power conditioning applications. The proposed MMC can be regarded as a hybrid topology combining the conventional single-phase modular multilevel matrix converter (MMMC) and an additional shunt branch. Owing to the extra degree of freedom provided by the shunt branch, the control efforts for branch energy balancing and power conditioning can be eased. The basic operating principle and control strategy are described. Effectiveness of the proposed topology is validated by the simulation results.

   Design of a Modular Multilevel Converter Prototype for Research Purposes
By Luca BESSEGATO [View]
[Download]

Abstract: As modular multilevel converters gradually become the preferred topology for many high-voltage and high-power applications, they are widely studied among researchers, who need experimental results to validate their studies. This paper discusses the design of a down-scaled modular multilevel converter prototype for research purposes, equipped with 30 full-bridge submodules and 10 kW rating. The design of this prototype is aimed at safety, flexibility, orderliness, and compactness. The challenges posed by the implementation of the converter prototype are examined, discussing the design of the prototype structure, the communication scheme, the full-bridge submodules, and the control hierarchy. The control system is based on Xilinx Zynq system-on-chip, which integrates programmable logic and processing system, allowing for extensive computational capability as well as simple reconfiguration. Experimental results showing the prototype in operation at nominal ratings are presented along with the devised graphical user interface.

   Finite Control Set Model Predictive Control applied to a Nested NPC to Increase the number of Output Levels
By Margarita NORAMBUENA [View]
[Download]

Abstract: This paper proposes a new 5-level voltage source converter for medium voltage (MV) and high power applications. The proposed converter can operate over a wide range of voltages with fewer number of power switches and components compared to the available 5-level power converters. Using a 4-level Nested Neutral Point Clamped and the Model Predictive Control strategy, it is possible to achieve a 5-level power converter without changes in the topology of the 4-level power converter. The performance of the proposed converter is verified by simulations.

   Global optimization of a high step-up DC-DC converter for CPV application
By Mickael PETIT [View]
[Download]

Abstract: This paper presents the structural optimization of a DC-DC converter for concentrated photovoltaic systems. The goal is to replace cell interconnection by a high-gain boost-mirror. The aim is to improve the energy efficiency of CPV installations. After the presentation of the boost-mirror and its 'adaptation' to the field of CPV, the sizing of the various components is performed (capacitors, intercellular transformer ...). Then the optimization of the complete converter is presented.

   Half Cycle Iref Deadbeat Control of Two-phase Interleaved DC-DC Buck Converter for High/Low Voltage Pulse Generation
By Hiromi ADACHI [View]
[Download]

Abstract: This paper describes a new deadbeat control law suitable for a two-phase interleaved buck converter for very quick generation of high/low pulse voltage. A very quick response for the high/low pulse output voltage synthesis is realized without any overshoots and undershoots.

   Hybrid Converter With Alternate Common Arm and Director Thyristors for High-Power Capability
By Panagiotis BAKAS [View]
[Download]

Abstract: This paper presents the basic operating principles of a new hybrid converter that combines thyristors and full-bridge (FB) arms for achieving high active-power capability. This converter consists of a modular multilevel converter (MMC) equipped with additional common arms, which alternate between the upper and lower dc poles. This alternation is achieved by the thyristors that are utilized as director switches and allow the parallel connection of the common arms and the arms of the MMC. The main contributions of this paper are the analysis of the operating principles, the simulation verification of the functionality of the proposed converter, and the comparison of the latter with the full-bridge modular multilevel converter (FB-MMC).

   Isolated Bidirectional Boost Full Bridge DC-DC Converter for Energy Storage Systems
By Satoshi IKEDA [View]
[Download]

Abstract: Due to the increasing demands of safe and efficient renewable energy systems, isolated dc-dc converters became widely used as the essential power conversion blocks. At the same time, such converters are demanded for wide operation voltage range and fault tolerance as desirable features. This paper proposes an isolated bidirectional boost full bridge dc-dc converter which features high efficiency and stable operation along 100 percent load change with a set of active voltage clamping snubber and active start-up circuits. To verify the feasibility of the proposed scheme, the converter is prototyped and tested experimentally in the output power up to 10 kW.

   Loss Analysis of Quasi Z-source Inverter Using Superjunction-MOSFET
By Ryuji IIJIMA [View]
[Download]

Abstract: This paper proposes to improve quasi Z-source inverter (QZSI) performance by using Superjunction-MOSFET. 2 kW class laboratory prototypes were fabricated to confirm this proposal and to compare the performance with the conventional inverter system using Si-IGBT. From loss breakdown of the both methods in various boost ratios and load conditions, it was confirmed that the proposed method can be operated with lower total loss than the conventional method in lower boost ratio operations by its reduced inverter conduction loss. On the other hand, in higher boost ratio operation, the proposed method had higher conversion loss than the conventional method due to increased switching and inductor losses.

   NEW QUADRATIC SEPIC CONVERTER WITH A SWITCHED-COUPLED INDUCTOR
By Boris AXELROD [View]
[Download]

Abstract: This paper presents a novel very high voltage gain DC-DC converter. Quadratic SEPIC converter incorporated with switched-coupled inductor. The leakage energy of coupled inductor is transferred to the load. The study analyzes operation of the proposed circuit in continuous and discontinuous regimes and determines the boundary between the operation modes. The theoretical expectations are confirmed by the experimental results.

   On Optimal construction of interleaved converter for minimum circulating current
By Gopal MONDAL [View]
[Download]

Abstract: This paper analyses the effects of increasing the number of parallel interleaved converters on the overall performance of the converter. The circulating current flowing within the parallel modules has direct relation with the number of parallel modules connected in order to construct the converter. In this paper an effort is made to identify an optimal situation in terms of number of parallel modules in case the designer has a choice to select. The paper shows that three parallel converters results into the lowest peak circulating current. The mathematical analysis to support this statement is presented in this paper, assuming the constant DC link voltage, switching frequency and module inductance for the parallel individual module and the total power of the whole converter is constant. It is shown in the paper that the maximum peak of the circulating current occurs during the zero crossing of the modulation reference. A method of reducing the circulating current by control of the modulation index is presented and shows a >50\% reduction in THD. The results are confirmed by laboratory testing.

EPE 2018 - DS1d: Advanced Power Converter Topologies I
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2018 ECCE Europe - Conference > EPE 2018 - Topic 02: Power Converter Topologies and Design > EPE 2018 - DS1d: Advanced Power Converter Topologies I
	[return to parent folder]

	A 50 kW Power Hardware-in-the-Loop Test Bench for Permanent Magnet Synchronous Machines based on a Modular Multilevel Converter By Mathias SCHNARRENBERGER	[View] [Download]
Abstract: This paper presents a power hardware-in-the-loop (PHIL) test bench for the emulation of highly utilized permanent magnet synchronous machines based on a square-wave powered Modular Multilevel Converter (SPMMC). Comparisons of the measurement results between an automotive machine and the PHIL during steady state operation and high dynamic current steps are done to show the performance of the PHIL test bench.

	A Novel Modular DC-DC Converter Based on High-Frequency-Link for MVDC Distribution Application By Cong ZHAO	[View] [Download]
Abstract: In this paper, a novel modular dc-dc converter (MDCC) based on high-frequency-link (HFL) is proposed for MVDC distribution application. The proposed MDCC employs series-connected submodules (SMs) in the MVDC side, and single active bridges (SABs) in parallel in the low voltage dc (LVDC) side. Besides, the MDCC can be operated as a dc breaker when dc short circuit faults occur in the MV side. In addition, the operation principle of SMs and the power transmission characterization of HFL are analyzed, based on which a control method for the MDCC is presented. Finally, simulation results verify the effectiveness of the proposed MDCC and the control method.

	A Single-Phase Direct AC-AC Modular Multilevel Converter for Railway Power Conditioning By Ming LEI	[View] [Download]
Abstract: This paper proposes a single-phase direct ac-ac modular multilevel converter (MMC) with the capability of equal frequency operation for railway power conditioning applications. The proposed MMC can be regarded as a hybrid topology combining the conventional single-phase modular multilevel matrix converter (MMMC) and an additional shunt branch. Owing to the extra degree of freedom provided by the shunt branch, the control efforts for branch energy balancing and power conditioning can be eased. The basic operating principle and control strategy are described. Effectiveness of the proposed topology is validated by the simulation results.

	Design of a Modular Multilevel Converter Prototype for Research Purposes By Luca BESSEGATO	[View] [Download]
Abstract: As modular multilevel converters gradually become the preferred topology for many high-voltage and high-power applications, they are widely studied among researchers, who need experimental results to validate their studies. This paper discusses the design of a down-scaled modular multilevel converter prototype for research purposes, equipped with 30 full-bridge submodules and 10 kW rating. The design of this prototype is aimed at safety, flexibility, orderliness, and compactness. The challenges posed by the implementation of the converter prototype are examined, discussing the design of the prototype structure, the communication scheme, the full-bridge submodules, and the control hierarchy. The control system is based on Xilinx Zynq system-on-chip, which integrates programmable logic and processing system, allowing for extensive computational capability as well as simple reconfiguration. Experimental results showing the prototype in operation at nominal ratings are presented along with the devised graphical user interface.

	Finite Control Set Model Predictive Control applied to a Nested NPC to Increase the number of Output Levels By Margarita NORAMBUENA	[View] [Download]
Abstract: This paper proposes a new 5-level voltage source converter for medium voltage (MV) and high power applications. The proposed converter can operate over a wide range of voltages with fewer number of power switches and components compared to the available 5-level power converters. Using a 4-level Nested Neutral Point Clamped and the Model Predictive Control strategy, it is possible to achieve a 5-level power converter without changes in the topology of the 4-level power converter. The performance of the proposed converter is verified by simulations.

	Global optimization of a high step-up DC-DC converter for CPV application By Mickael PETIT	[View] [Download]
Abstract: This paper presents the structural optimization of a DC-DC converter for concentrated photovoltaic systems. The goal is to replace cell interconnection by a high-gain boost-mirror. The aim is to improve the energy efficiency of CPV installations. After the presentation of the boost-mirror and its 'adaptation' to the field of CPV, the sizing of the various components is performed (capacitors, intercellular transformer ...). Then the optimization of the complete converter is presented.

	Half Cycle Iref Deadbeat Control of Two-phase Interleaved DC-DC Buck Converter for High/Low Voltage Pulse Generation By Hiromi ADACHI	[View] [Download]
Abstract: This paper describes a new deadbeat control law suitable for a two-phase interleaved buck converter for very quick generation of high/low pulse voltage. A very quick response for the high/low pulse output voltage synthesis is realized without any overshoots and undershoots.

	Hybrid Converter With Alternate Common Arm and Director Thyristors for High-Power Capability By Panagiotis BAKAS	[View] [Download]
Abstract: This paper presents the basic operating principles of a new hybrid converter that combines thyristors and full-bridge (FB) arms for achieving high active-power capability. This converter consists of a modular multilevel converter (MMC) equipped with additional common arms, which alternate between the upper and lower dc poles. This alternation is achieved by the thyristors that are utilized as director switches and allow the parallel connection of the common arms and the arms of the MMC. The main contributions of this paper are the analysis of the operating principles, the simulation verification of the functionality of the proposed converter, and the comparison of the latter with the full-bridge modular multilevel converter (FB-MMC).

	Isolated Bidirectional Boost Full Bridge DC-DC Converter for Energy Storage Systems By Satoshi IKEDA	[View] [Download]
Abstract: Due to the increasing demands of safe and efficient renewable energy systems, isolated dc-dc converters became widely used as the essential power conversion blocks. At the same time, such converters are demanded for wide operation voltage range and fault tolerance as desirable features. This paper proposes an isolated bidirectional boost full bridge dc-dc converter which features high efficiency and stable operation along 100 percent load change with a set of active voltage clamping snubber and active start-up circuits. To verify the feasibility of the proposed scheme, the converter is prototyped and tested experimentally in the output power up to 10 kW.

	Loss Analysis of Quasi Z-source Inverter Using Superjunction-MOSFET By Ryuji IIJIMA	[View] [Download]
Abstract: This paper proposes to improve quasi Z-source inverter (QZSI) performance by using Superjunction-MOSFET. 2 kW class laboratory prototypes were fabricated to confirm this proposal and to compare the performance with the conventional inverter system using Si-IGBT. From loss breakdown of the both methods in various boost ratios and load conditions, it was confirmed that the proposed method can be operated with lower total loss than the conventional method in lower boost ratio operations by its reduced inverter conduction loss. On the other hand, in higher boost ratio operation, the proposed method had higher conversion loss than the conventional method due to increased switching and inductor losses.

	NEW QUADRATIC SEPIC CONVERTER WITH A SWITCHED-COUPLED INDUCTOR By Boris AXELROD	[View] [Download]
Abstract: This paper presents a novel very high voltage gain DC-DC converter. Quadratic SEPIC converter incorporated with switched-coupled inductor. The leakage energy of coupled inductor is transferred to the load. The study analyzes operation of the proposed circuit in continuous and discontinuous regimes and determines the boundary between the operation modes. The theoretical expectations are confirmed by the experimental results.

	On Optimal construction of interleaved converter for minimum circulating current By Gopal MONDAL	[View] [Download]
Abstract: This paper analyses the effects of increasing the number of parallel interleaved converters on the overall performance of the converter. The circulating current flowing within the parallel modules has direct relation with the number of parallel modules connected in order to construct the converter. In this paper an effort is made to identify an optimal situation in terms of number of parallel modules in case the designer has a choice to select. The paper shows that three parallel converters results into the lowest peak circulating current. The mathematical analysis to support this statement is presented in this paper, assuming the constant DC link voltage, switching frequency and module inductance for the parallel individual module and the total power of the whole converter is constant. It is shown in the paper that the maximum peak of the circulating current occurs during the zero crossing of the modulation reference. A method of reducing the circulating current by control of the modulation index is presented and shows a >50\% reduction in THD. The results are confirmed by laboratory testing.