EPE Association: EPE 2017 - DS1l: Industry Specific ECCE Technologies

EPE 2017 - DS1l: Industry Specific ECCE Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 09: Industry-Specific Energy Conversion and Conditioning Technologies > EPE 2017 - DS1l: Industry Specific ECCE Technologies

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   A 600kW Power Supply for Particle Accelerators Insensitive to Grid Perturbations
By Ivan JOSIFOVIC [View]
[Download]

Abstract: The papers presents implementation of a 600 kW DC power converter resistant to electrical network perturbations on an 18 kV electrical network feeding the input of the power converter. The manuscript describes experimental assessment of converter output performance during both nominal electrical network conditions and transient grid voltage dips.

   Comparison between Energy Storage System and Regenerative Inverter in D.C. Traction Power Supply System for Regenerative Energy Utilization
By Hitoshi HAYASHIYA [View]
[Download]

Abstract: We, East Japan Railway Company, have already installed three energy storage systems in d.c. railway power supply system around Tokyo area for regenerative energy utilization and are now constructing new regenerative inverter system at Tokyo Station. In this paper, advantages and disadvantages of those systems will be compared. Furthermore, the examples of load waveforms of traction power supply system and distribution line system at Kajibashi Substation will be shown to discuss feasibility of regenerative energy utilization.

   DC/DC-Converter for Fuel Cell Integration in More Electric Aircraft Applications
By Mathias WARNCKE [View]
[Download]

Abstract: In this paper a power density optimised DC/DC-converter for the integration of a multifunctional fuelcell system (MFFCS) to a +/- 270V bipolar high voltage DC (HVDC) grid in a more electric aircraft ispresented. The proposed system is designed to operate at a cooling liquid temperature of 80°C.

   Hybrid Capacitor Discharge/Switch-Mode Converter for Pulsed Applications: Topology and Control design
By Ludovic HORREIN [View]
[Download]

Abstract: The paper objective is to propose an innovative power converter topology combining the advantages of capacitor discharge and switch-mode converters to generate half sinusoidal fast current pulses with high precision. The capacitor discharge operation mode of the converter allows the generation of current pulses with fast transient response and the switch-mode operation enables the control of the pulse shape with high precision. The Energetic Macroscopic Representation permits to address these two aspects using a unified formalism and to deduce the control laws for the regulation of the hybrid converter voltage and current. In this paper, the converter requirements are presented and the proposed topology is described. The converter is then modelled using EMR and its control loops are defined. Finally, simulations results are given.

   Investigation on Differential to Common Mode Coupling in the Output Cable of AC Drive for More Electric Aircraft
By Danil DROZHZHIN [View]
[Download]

Abstract: This work considers the coupling effects between differential and common modes, which have an impact on the conducted electromagnetic noise generated by variable speed drive supplied from DC grid of an aircraft. Common mode noise, which origins from the differential mode, was observed during conducted EMI measurements at the output shielded cable, due to asymmetry of the cable. It is shown, that such noise can exceed the corresponding limit. The mixed mode scattering parameters are considered for the study of the mode coupling. They were measured and adopted for the output shielded cable. Finally, they were integrated into the frequency domain behavioural models in order to predict the EMI including mixed mode noise. The results are showing good accordance with the real setup measurements. It was also shown, that ignoring of the mixed mode noise can lead to the wrong design of EMI filters. The considered simulation approach can be applied to the other components of the system as well. The resulting models are proposed to be used for optimal design of EMI filters for a variable speed drive of more electric aircraft.

   OUTPUT FILTER REDUCTION WITH A COMBINED LINEAR-NON-LINEAR CONTROL
By Mariel TRIGGIANESE [View]
[Download]

Abstract: The transient performance of a DC power supply strongly depends on the loop design and output filtersizing. Most of the time, the finite loop bandwidth imposes the need of a large output filter capacitor inorder to comply with the required regulation performance and stability margins. In space applications thelinear conductance control principle has been used for a long time. It reduces the voltage regulator to asimple 'first order' system, thus simplifying the analysis. In order to decrease the size of the output filterand to enhance the converter dynamic response, a modified control technique is proposed in this paper.This concept has been demonstrated on a buck converter and it can be used in space applications, where'three-domain control' is implemented for a regulated bus.

   Power Generation on-board Aircraft using an Air-Powered Turbine Generator and Battery Interface System
By Adel COETZER [View]
[Download]

Abstract: The design and implementation of a prototype hybrid power generation system, consisting of a ram air turbine (RAT) generator and an energy storage unit, is presented. The system is intended as a mechanism to supply additional or emergency power on-board an aircraft. Here we present the design, manufacture and testing of a synchronous rectifier required to interface an asynchronous generator to a dc bus. The dc bus connects to a battery of electrochemical cells through a bidirectional dc-dc converter. The dc-dc converter functions to regulate the dc bus voltage by utilising a double control loop strategy with an inner current control loop and outer voltage control loop. The power delivered to the dc bus from the generator is controlled as a function of the battery voltage, dc bus current and generator shaft speed. The control strategy used by the prototype circuit is presented in this paper along with simulation and experimental results.

   SiC BASED SOLID STATE PROTECTION SWITCHES FOR SPACE APPLICATIONS
By DAVID MARROQUI [View]
[Download]

Abstract: Development and technology maturation of Silicon Carbide (SiC) power transistors over the last 15years has motivated its study in aerospace systems. When compared with Si devices, superior voltageblocking capacity and the capability of operation at higher temperatures, give important advantages inspace power electronics applications, similar to what happens in terrestrial electronics.This paper discusses the use of SiC power transistors for Solid State Power Switches especiallyaddressed to the space segment. Two applications will be covered, the first is the Solid State ShuntSwitch, widely used in high power Direct Energy Transfer (DET) photovoltaic power regulators and thesecond is the Solid State Series Switch, which has been identified for high voltage (up to few kV)protection systems.

EPE 2017 - DS1l: Industry Specific ECCE Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 09: Industry-Specific Energy Conversion and Conditioning Technologies > EPE 2017 - DS1l: Industry Specific ECCE Technologies
	[return to parent folder]

	A 600kW Power Supply for Particle Accelerators Insensitive to Grid Perturbations By Ivan JOSIFOVIC	[View] [Download]
Abstract: The papers presents implementation of a 600 kW DC power converter resistant to electrical network perturbations on an 18 kV electrical network feeding the input of the power converter. The manuscript describes experimental assessment of converter output performance during both nominal electrical network conditions and transient grid voltage dips.

	Comparison between Energy Storage System and Regenerative Inverter in D.C. Traction Power Supply System for Regenerative Energy Utilization By Hitoshi HAYASHIYA	[View] [Download]
Abstract: We, East Japan Railway Company, have already installed three energy storage systems in d.c. railway power supply system around Tokyo area for regenerative energy utilization and are now constructing new regenerative inverter system at Tokyo Station. In this paper, advantages and disadvantages of those systems will be compared. Furthermore, the examples of load waveforms of traction power supply system and distribution line system at Kajibashi Substation will be shown to discuss feasibility of regenerative energy utilization.

	DC/DC-Converter for Fuel Cell Integration in More Electric Aircraft Applications By Mathias WARNCKE	[View] [Download]
Abstract: In this paper a power density optimised DC/DC-converter for the integration of a multifunctional fuelcell system (MFFCS) to a +/- 270V bipolar high voltage DC (HVDC) grid in a more electric aircraft ispresented. The proposed system is designed to operate at a cooling liquid temperature of 80°C.

	Hybrid Capacitor Discharge/Switch-Mode Converter for Pulsed Applications: Topology and Control design By Ludovic HORREIN	[View] [Download]
Abstract: The paper objective is to propose an innovative power converter topology combining the advantages of capacitor discharge and switch-mode converters to generate half sinusoidal fast current pulses with high precision. The capacitor discharge operation mode of the converter allows the generation of current pulses with fast transient response and the switch-mode operation enables the control of the pulse shape with high precision. The Energetic Macroscopic Representation permits to address these two aspects using a unified formalism and to deduce the control laws for the regulation of the hybrid converter voltage and current. In this paper, the converter requirements are presented and the proposed topology is described. The converter is then modelled using EMR and its control loops are defined. Finally, simulations results are given.

	Investigation on Differential to Common Mode Coupling in the Output Cable of AC Drive for More Electric Aircraft By Danil DROZHZHIN	[View] [Download]
Abstract: This work considers the coupling effects between differential and common modes, which have an impact on the conducted electromagnetic noise generated by variable speed drive supplied from DC grid of an aircraft. Common mode noise, which origins from the differential mode, was observed during conducted EMI measurements at the output shielded cable, due to asymmetry of the cable. It is shown, that such noise can exceed the corresponding limit. The mixed mode scattering parameters are considered for the study of the mode coupling. They were measured and adopted for the output shielded cable. Finally, they were integrated into the frequency domain behavioural models in order to predict the EMI including mixed mode noise. The results are showing good accordance with the real setup measurements. It was also shown, that ignoring of the mixed mode noise can lead to the wrong design of EMI filters. The considered simulation approach can be applied to the other components of the system as well. The resulting models are proposed to be used for optimal design of EMI filters for a variable speed drive of more electric aircraft.

	OUTPUT FILTER REDUCTION WITH A COMBINED LINEAR-NON-LINEAR CONTROL By Mariel TRIGGIANESE	[View] [Download]
Abstract: The transient performance of a DC power supply strongly depends on the loop design and output filtersizing. Most of the time, the finite loop bandwidth imposes the need of a large output filter capacitor inorder to comply with the required regulation performance and stability margins. In space applications thelinear conductance control principle has been used for a long time. It reduces the voltage regulator to asimple 'first order' system, thus simplifying the analysis. In order to decrease the size of the output filterand to enhance the converter dynamic response, a modified control technique is proposed in this paper.This concept has been demonstrated on a buck converter and it can be used in space applications, where'three-domain control' is implemented for a regulated bus.

	Power Generation on-board Aircraft using an Air-Powered Turbine Generator and Battery Interface System By Adel COETZER	[View] [Download]
Abstract: The design and implementation of a prototype hybrid power generation system, consisting of a ram air turbine (RAT) generator and an energy storage unit, is presented. The system is intended as a mechanism to supply additional or emergency power on-board an aircraft. Here we present the design, manufacture and testing of a synchronous rectifier required to interface an asynchronous generator to a dc bus. The dc bus connects to a battery of electrochemical cells through a bidirectional dc-dc converter. The dc-dc converter functions to regulate the dc bus voltage by utilising a double control loop strategy with an inner current control loop and outer voltage control loop. The power delivered to the dc bus from the generator is controlled as a function of the battery voltage, dc bus current and generator shaft speed. The control strategy used by the prototype circuit is presented in this paper along with simulation and experimental results.

	SiC BASED SOLID STATE PROTECTION SWITCHES FOR SPACE APPLICATIONS By DAVID MARROQUI	[View] [Download]
Abstract: Development and technology maturation of Silicon Carbide (SiC) power transistors over the last 15years has motivated its study in aerospace systems. When compared with Si devices, superior voltageblocking capacity and the capability of operation at higher temperatures, give important advantages inspace power electronics applications, similar to what happens in terrestrial electronics.This paper discusses the use of SiC power transistors for Solid State Power Switches especiallyaddressed to the space segment. Two applications will be covered, the first is the Solid State ShuntSwitch, widely used in high power Direct Energy Transfer (DET) photovoltaic power regulators and thesecond is the Solid State Series Switch, which has been identified for high voltage (up to few kV)protection systems.