EPE Association: EPE 2017 - DS2a: Advanced Power Converter Topologies I

EPE 2017 - DS2a: Advanced Power Converter Topologies I
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 02: Power Converter Topologies and Design > EPE 2017 - DS2a: Advanced Power Converter Topologies I

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   A Novel Nine-Level Boost Inverter with Reduced Structure and Simple DC Link Capacitor Control
By Omid SALARI [View]
[Download]

Abstract: This paper presents a boost switched-capacitor nine-level single-phase inverter, which utilizes flying capacitors and an H-bridge. Besides the boosting ability, the inverter is capable of producing redundant switching states that are used as a degree of freedom in controlling the voltage of DC link capacitor. A comprehensive study of the theoretical aspects of the proposed structure and its practical considerations have been conducted. The performance of the inverter has been evaluated using simulation and experimental results.

   A Novel Seven-level Active Neutral-point-clamped Converter Topology with auxiliary commutating branches and Its Commutating Strategies
By Weihui SHENG [View]
[Download]

Abstract: Traditional seven-level Active Neutral-point-clamped (ANPC-7L) converters suffer from the problems of dynamic voltage balancing in series switches and multi voltage levels jumping of phase output voltage during switching status transition. This paper presents a novel ANPC-7L topology with auxiliary commutating branches and elaborates on its commutating strategies. The presented topology and its commutating strategies resolve the two problems completely. The validity of the presented topology and its commutating strategies are verified by experimental results from a 380 V/5 kW ANPC-7L converter.

   Comparison of fault-tolerant multilevel inverters
By Michael GLEISSNER [View]
[Download]

Abstract: Fault-tolerant multilevel inverters outperform known fault-tolerant 2-level inverters regarding efficiency and power density. The most promising fault-tolerant multilevel inverters for system voltages below 2 kV are the flying capacitor and the active neutral point clamped type. They differ regarding required voltage overrating of semiconductors, tolerance for open and short-on failure types and maximum post-fault output power.

   Comparison of multilevel converter topologies for traction drives considering reduced transformer leakage inductance
By Till-Mathis PLÖTZ [View]
[Download]

Abstract: In modern traction drives the transformer causes a high amount of the overall losses. A transformer withlower losses however increases the THD of the output current and the amplitude of the fault current. Twoconverters will be presented which make the utilization of an enhanced transformer possible.

   Control of a cascaded hybrid multilevel converter for the use in rail vehicles
By Ingmar KIRCHNER [View]
[Download]

Abstract: This paper is about the design for the control of a cascaded hybrid converter for railway applications. It shows,how to control the converter with considerations of special aspects for the use in rail vehicles. It considers severalaspects of reducing THD of the current and reduction of switching losses.

   Modulation Scheme to Improve the Efficiency for Low Load Operating Points for a Dual-Active-Bridge DC/DC-Converter
By Milad KHANI [View]
[Download]

Abstract: The traditional phase shift modulation for the dual active bridge DC/DC-converter has the disadvantage of losing zero voltage switching (ZVS) at low load operations. This paper proposes a novel modulation scheme which enables the use of ZVS at low load conditions with a constant starting current and other advantages such as completely linear behavior at low loads and higher robustness against parameter tolerances.

   Research on Neutral-point Potential Balancing Algorithm for Seven-level Active Neutral-point-clamped Inverters
By Weihui SHENG [View]
[Download]

Abstract: This paper introduces seven-level Active Neutral-point-clamped (ANPC-7L) inverter first. Then, the paper decouples the two problems of floating capacitors voltage controlling and neutral-point potential balancing by using the concept of average state, proposes a novel neutral-point potential balancing model based on zero-sequence voltage injection. After that, two neutral-point potential balancing algorithms and their full controllable regions are derived respectively. Finally, the two neutral-point potential balancing algorithms are modified for real-time implementation for different modulation regions. The validity of the proposed neutral-point potential balancing model and algorithms are verified by experimental results from a 380 V/5 kW ANPC-7L inverter.

   Single-Stage Immittance-Based Three-Phase AC-DC Bidirectional Converter and PWM Strategy for Realizing Zero Circulating Power
By YIU PANG CHAN [View]
[Download]

Abstract: A new single-stage three-phase resonant ac-dc quad-active-bridge (QAD) converter is proposed. It uses a new modulation scheme designed for use with a tuned LCL resonant network that achieves unity power factor at both network ports, which leads to reduction in rms bridge currents and conduction loss. The line-frequency phase currents are individually controllable by modulating the ac-side and dc-side switches according to user-prescribed current references.

   Spectral Analysis of a scalar modulated Matrix Converter based on 3-D Fourier integral
By Lin QIU [View]
[Download]

Abstract: This paper proposes an analytical spectral calculation method based on 3-D Fourier integral to obtain accurate spectra of both output voltage and input current of a scalar modulated matrix converter. The matrix converter (MC) is a direct AC-AC power converter without an intermediate DC link; three-phase output is synthesized by three-phase input through nine bidirectional switches. At present, there is little research on spectral analysis for scalar modulated matrix converter. This paper focus on spectral calculation, by the adoption of 3-D Fourier integral, spectral of bidirectional switch duty cycle function, output voltage and input current can be achieved. When analytic spectral solution is obtained, the correspondence between modulation strategy and harmonic components is established. Simulation and experimental results are given to demonstrate the theoretical work.

   SVM-plus-Phase-Shift Modulation Strategy for Single-Stage Immittance-Based Three-Phase AC-DC Bidirectional Converter
By YIU PANG CHAN [View]
[Download]

Abstract: A new single-stage three-phase resonant ac-dc matrix-based converter is proposed. It uses a new modulation scheme designed for use with a tuned LCL resonant network that achieves unity power factor at both network ports, which leads to reduction in rms bridge currents and conduction loss. The line-frequency phase currents are controllable by modulating the ac-side and dc-side switches according to space vector voltage and user-prescribed current references.

EPE 2017 - DS2a: Advanced Power Converter Topologies I
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 02: Power Converter Topologies and Design > EPE 2017 - DS2a: Advanced Power Converter Topologies I
	[return to parent folder]

	A Novel Nine-Level Boost Inverter with Reduced Structure and Simple DC Link Capacitor Control By Omid SALARI	[View] [Download]
Abstract: This paper presents a boost switched-capacitor nine-level single-phase inverter, which utilizes flying capacitors and an H-bridge. Besides the boosting ability, the inverter is capable of producing redundant switching states that are used as a degree of freedom in controlling the voltage of DC link capacitor. A comprehensive study of the theoretical aspects of the proposed structure and its practical considerations have been conducted. The performance of the inverter has been evaluated using simulation and experimental results.

	A Novel Seven-level Active Neutral-point-clamped Converter Topology with auxiliary commutating branches and Its Commutating Strategies By Weihui SHENG	[View] [Download]
Abstract: Traditional seven-level Active Neutral-point-clamped (ANPC-7L) converters suffer from the problems of dynamic voltage balancing in series switches and multi voltage levels jumping of phase output voltage during switching status transition. This paper presents a novel ANPC-7L topology with auxiliary commutating branches and elaborates on its commutating strategies. The presented topology and its commutating strategies resolve the two problems completely. The validity of the presented topology and its commutating strategies are verified by experimental results from a 380 V/5 kW ANPC-7L converter.

	Comparison of fault-tolerant multilevel inverters By Michael GLEISSNER	[View] [Download]
Abstract: Fault-tolerant multilevel inverters outperform known fault-tolerant 2-level inverters regarding efficiency and power density. The most promising fault-tolerant multilevel inverters for system voltages below 2 kV are the flying capacitor and the active neutral point clamped type. They differ regarding required voltage overrating of semiconductors, tolerance for open and short-on failure types and maximum post-fault output power.

	Comparison of multilevel converter topologies for traction drives considering reduced transformer leakage inductance By Till-Mathis PLÖTZ	[View] [Download]
Abstract: In modern traction drives the transformer causes a high amount of the overall losses. A transformer withlower losses however increases the THD of the output current and the amplitude of the fault current. Twoconverters will be presented which make the utilization of an enhanced transformer possible.

	Control of a cascaded hybrid multilevel converter for the use in rail vehicles By Ingmar KIRCHNER	[View] [Download]
Abstract: This paper is about the design for the control of a cascaded hybrid converter for railway applications. It shows,how to control the converter with considerations of special aspects for the use in rail vehicles. It considers severalaspects of reducing THD of the current and reduction of switching losses.

	Modulation Scheme to Improve the Efficiency for Low Load Operating Points for a Dual-Active-Bridge DC/DC-Converter By Milad KHANI	[View] [Download]
Abstract: The traditional phase shift modulation for the dual active bridge DC/DC-converter has the disadvantage of losing zero voltage switching (ZVS) at low load operations. This paper proposes a novel modulation scheme which enables the use of ZVS at low load conditions with a constant starting current and other advantages such as completely linear behavior at low loads and higher robustness against parameter tolerances.

	Research on Neutral-point Potential Balancing Algorithm for Seven-level Active Neutral-point-clamped Inverters By Weihui SHENG	[View] [Download]
Abstract: This paper introduces seven-level Active Neutral-point-clamped (ANPC-7L) inverter first. Then, the paper decouples the two problems of floating capacitors voltage controlling and neutral-point potential balancing by using the concept of average state, proposes a novel neutral-point potential balancing model based on zero-sequence voltage injection. After that, two neutral-point potential balancing algorithms and their full controllable regions are derived respectively. Finally, the two neutral-point potential balancing algorithms are modified for real-time implementation for different modulation regions. The validity of the proposed neutral-point potential balancing model and algorithms are verified by experimental results from a 380 V/5 kW ANPC-7L inverter.

	Single-Stage Immittance-Based Three-Phase AC-DC Bidirectional Converter and PWM Strategy for Realizing Zero Circulating Power By YIU PANG CHAN	[View] [Download]
Abstract: A new single-stage three-phase resonant ac-dc quad-active-bridge (QAD) converter is proposed. It uses a new modulation scheme designed for use with a tuned LCL resonant network that achieves unity power factor at both network ports, which leads to reduction in rms bridge currents and conduction loss. The line-frequency phase currents are individually controllable by modulating the ac-side and dc-side switches according to user-prescribed current references.

	Spectral Analysis of a scalar modulated Matrix Converter based on 3-D Fourier integral By Lin QIU	[View] [Download]
Abstract: This paper proposes an analytical spectral calculation method based on 3-D Fourier integral to obtain accurate spectra of both output voltage and input current of a scalar modulated matrix converter. The matrix converter (MC) is a direct AC-AC power converter without an intermediate DC link; three-phase output is synthesized by three-phase input through nine bidirectional switches. At present, there is little research on spectral analysis for scalar modulated matrix converter. This paper focus on spectral calculation, by the adoption of 3-D Fourier integral, spectral of bidirectional switch duty cycle function, output voltage and input current can be achieved. When analytic spectral solution is obtained, the correspondence between modulation strategy and harmonic components is established. Simulation and experimental results are given to demonstrate the theoretical work.

	SVM-plus-Phase-Shift Modulation Strategy for Single-Stage Immittance-Based Three-Phase AC-DC Bidirectional Converter By YIU PANG CHAN	[View] [Download]
Abstract: A new single-stage three-phase resonant ac-dc matrix-based converter is proposed. It uses a new modulation scheme designed for use with a tuned LCL resonant network that achieves unity power factor at both network ports, which leads to reduction in rms bridge currents and conduction loss. The line-frequency phase currents are controllable by modulating the ac-side and dc-side switches according to space vector voltage and user-prescribed current references.