EPE Association: EPE 2018 - DS2i: Electric Vehicle Propulsion Systems and their Energy Storage

EPE 2018 - DS2i: Electric Vehicle Propulsion Systems and their Energy Storage
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2018 ECCE Europe - Conference > EPE 2018 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2018 - DS2i: Electric Vehicle Propulsion Systems and their Energy Storage

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   A Novel Concept to Control the Powertrain in Battery Fuel Cell Hybrid Vehicles
By Folker RENKEN [View]
[Download]

Abstract: This paper presents a novel concept to control the powertrain in battery fuel cell hybrid vehicles. Instead of a DC/DC converter, a simple power electronic switch is connected between the battery and the fuel cell system. For this, the electronic switch has to work in linear operation for several seconds during the switch-on and switch-off process. Because of the extreme switching loads, several semiconductors are connected in parallel and the individual currents are measured and balanced by a microprocessor control circuit. The paper ends with the practical use of the power electronic switch in the test bench to replicate the drive train operation of battery-fuel cell hybrid vehicles.

   Active Damping of Drivetrain Oscillations in Electric Buses
By Dietmar TISSEN [View]
[Download]

Abstract: A modern drive control for electric vehicles has multiple tasks. Especially for an electric trolley bus, acontroller for stable dc-link voltage is necessary. Additionally, active damping is required to eliminateoscillations in the drivetrain. This paper describes a combination of such controllers to a newfunctionality.

   An Approach for Active Damping of DC Ripple Currents in Low-Resistive DC Systems
By Sebastian RAAB [View]
[Download]

Abstract: When coupling the DC-link of a voltage source IGBT inverter to low-resistive, high current loads likelithium-ion batteries ripple currents emerge, causing additional losses or even damage to componentsexposed to it. The classical approach for damping DC ripple currents is to use electrolyte or film capacitorsat the DC-link of the inverter. This paper introduces an approach for partial substitution of DC-linkcapacitors by using a power electronic control element for active filtering of DC ripple currents. In orderto gain sufficient dynamic, the active filter power stage consists of fast switching silicon carbide (SiC)MOSFETs. A H-bridge topology is used for the active filter in order to enable bidirectional power transfer.Simulation results prove the effectiveness of the chosen approach. A simulative comparison betweenactive and passive filtering promises advantages for the design by reducing passive filter componentsat comparable efficiency. A test bench was setup to validate the simulations. Measurements confirmsimulations and prove the theoretical approach.

   Efficiency of Active Three-Level and Five-Level NPC Inverters compared to a Two-Level Inverter in a Vehicle
By Anton KERSTEN [View]
[Download]

Abstract: This paper deals with a comparison of a standard two-level inverter, with a three-level and a five-level active neutral point clamped (ANPC) inverter for vehicle traction applications. The inverter efficiencies during different drive cycles are assessed and an efficiency enhancement of the multilevel inverters for partial loading and different drive cycle scenarios is found.

   Electric vehicle IGBT power module sizing and drive cycle energy efficiency for various switching frequencies - based on a scalable module model
By Emma GRUNDITZ [View]
[Download]

Abstract: Preferably, in electric vehicles, the drive system components are sized to comply with performancerequirements while simultaneously striving to keep energy losses and cost down. One of the parametersaffecting the inverter's losses is the selected switching frequency. Hence it could also play a role duringsizing. In this paper an electric vehicle IGBT power module is sized using various switching frequencies,against a scaled reference electric machine. As a tool for this assessment a scalable power module modelis suggested, that scales with current rating. Finally, the impact on drive cycle efficiency is determinedfor various inverter ratings designed for different switching frequencies.

   Online Estimation of a Mechanical Driveline Parameters of a Hybrid Bus
By Niko NEVARANTA [View]
[Download]

Abstract: This paper addresses issues in real-time identification of mechanical driveline parameters of a hybrid electric bus. The mechanical system is excited by an artificially generated excitation signal, namely apseudo-random binary signal (PRBS), and the parameters are identified using a recursive output erroralgorithm with filtered observations (OEFO). The identification routine is experimentally validated byusing a hybridized bus as a test vehicle and considering on-road measurements with a moderate velocityin series electric operation mode.

   Quasi Z-source with Single Pulse Drive Inverter for Hybrid/Electric Vehicles
By Thilak SENANAYAKE [View]
[Download]

Abstract: An improved circuit topology of quasi Z-source inverter is presented that will meet the requirements and features of the Hybrid / Electric vehicle power control system. It is able to perform one pulse control for motor drive control depending on the drive condition of a motor which cannot be achieved from the conventional quasi Z-source inverter.

   Switched reluctance motor controller for light electric vehicles
By Pere ANDRADA [View]
[Download]

Abstract: Nowadays, switched reluctance motor drives are one of the most promising alternatives for the elimination of permanent magnets in the electric traction systems, due to their well-known advantages such as simple and rugged construction, high efficiency, speed torque characteristic well adapted to traction needs and despite their drawbacks high torque ripple and high acoustic noise. Unfortunately, nowadays, the lack of commercial controllers intended for switched reluctance motors slows down its use as power traction unit. This paper tries to overcome this barrier proposing a specific controller, understood as the assembly of electronic power converter and control unit, for electric light vehicles. First, the specifications of the controller will be exposed then a comprehensive description of the architecture of the controller and details about the choice of its components will be given. Finally, experimental results will be shown in order to demonstrate its suitability as a SRM controller for light electric vehicles.

   The potential for power quality problem mitigation through STATCOM (BESS-STATCOM)
By Arsalan hussain ZAIDI [View]
[Download]

Abstract: Consideration of spatial and temporal diversity of EV charging demand has been demonstrated to reducethe estimating impacts on the distribution networks. The data formulation is based on impact studies ofElectrical vehicles (EVs) on distribution networks. It is suggested that Distribution System Operator (DSO) could benefit for new innovation/advancement in the market (BESS-STATCOM) in a way that makes networks more reliable/robust, In this regard such innovation creates more opportunities for demand side management, reduces planning uncertainties associated with stochastic nature of EV charging and makes space for demand side management. This work considers probabilistic load flow in a representative unbalanced distribution network and through Monte Carlo simulation increased the hosting capacity for DG/EV is considered in an Irish/UK context. Furthermore, this paper considers the potential for a distribution network deployed STATCOM in supporting EV penetration, while maintaining appropriate power quality (voltage) standards. To reduce the computation burden of Monte Carlo simulation an alternative (novel but simple) method is applied. In terms of the Irish/UK DSO perspective, this work will help to increase the hosting capacity of DG/EV without breaching power quality limits.

EPE 2018 - DS2i: Electric Vehicle Propulsion Systems and their Energy Storage
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2018 ECCE Europe - Conference > EPE 2018 - Topic 08: Electric Vehicle Propulsion Systems and their Energy Storage > EPE 2018 - DS2i: Electric Vehicle Propulsion Systems and their Energy Storage
	[return to parent folder]

	A Novel Concept to Control the Powertrain in Battery Fuel Cell Hybrid Vehicles By Folker RENKEN	[View] [Download]
Abstract: This paper presents a novel concept to control the powertrain in battery fuel cell hybrid vehicles. Instead of a DC/DC converter, a simple power electronic switch is connected between the battery and the fuel cell system. For this, the electronic switch has to work in linear operation for several seconds during the switch-on and switch-off process. Because of the extreme switching loads, several semiconductors are connected in parallel and the individual currents are measured and balanced by a microprocessor control circuit. The paper ends with the practical use of the power electronic switch in the test bench to replicate the drive train operation of battery-fuel cell hybrid vehicles.

	Active Damping of Drivetrain Oscillations in Electric Buses By Dietmar TISSEN	[View] [Download]
Abstract: A modern drive control for electric vehicles has multiple tasks. Especially for an electric trolley bus, acontroller for stable dc-link voltage is necessary. Additionally, active damping is required to eliminateoscillations in the drivetrain. This paper describes a combination of such controllers to a newfunctionality.

	An Approach for Active Damping of DC Ripple Currents in Low-Resistive DC Systems By Sebastian RAAB	[View] [Download]
Abstract: When coupling the DC-link of a voltage source IGBT inverter to low-resistive, high current loads likelithium-ion batteries ripple currents emerge, causing additional losses or even damage to componentsexposed to it. The classical approach for damping DC ripple currents is to use electrolyte or film capacitorsat the DC-link of the inverter. This paper introduces an approach for partial substitution of DC-linkcapacitors by using a power electronic control element for active filtering of DC ripple currents. In orderto gain sufficient dynamic, the active filter power stage consists of fast switching silicon carbide (SiC)MOSFETs. A H-bridge topology is used for the active filter in order to enable bidirectional power transfer.Simulation results prove the effectiveness of the chosen approach. A simulative comparison betweenactive and passive filtering promises advantages for the design by reducing passive filter componentsat comparable efficiency. A test bench was setup to validate the simulations. Measurements confirmsimulations and prove the theoretical approach.

	Efficiency of Active Three-Level and Five-Level NPC Inverters compared to a Two-Level Inverter in a Vehicle By Anton KERSTEN	[View] [Download]
Abstract: This paper deals with a comparison of a standard two-level inverter, with a three-level and a five-level active neutral point clamped (ANPC) inverter for vehicle traction applications. The inverter efficiencies during different drive cycles are assessed and an efficiency enhancement of the multilevel inverters for partial loading and different drive cycle scenarios is found.

	Electric vehicle IGBT power module sizing and drive cycle energy efficiency for various switching frequencies - based on a scalable module model By Emma GRUNDITZ	[View] [Download]
Abstract: Preferably, in electric vehicles, the drive system components are sized to comply with performancerequirements while simultaneously striving to keep energy losses and cost down. One of the parametersaffecting the inverter's losses is the selected switching frequency. Hence it could also play a role duringsizing. In this paper an electric vehicle IGBT power module is sized using various switching frequencies,against a scaled reference electric machine. As a tool for this assessment a scalable power module modelis suggested, that scales with current rating. Finally, the impact on drive cycle efficiency is determinedfor various inverter ratings designed for different switching frequencies.

	Online Estimation of a Mechanical Driveline Parameters of a Hybrid Bus By Niko NEVARANTA	[View] [Download]
Abstract: This paper addresses issues in real-time identification of mechanical driveline parameters of a hybrid electric bus. The mechanical system is excited by an artificially generated excitation signal, namely apseudo-random binary signal (PRBS), and the parameters are identified using a recursive output erroralgorithm with filtered observations (OEFO). The identification routine is experimentally validated byusing a hybridized bus as a test vehicle and considering on-road measurements with a moderate velocityin series electric operation mode.

	Quasi Z-source with Single Pulse Drive Inverter for Hybrid/Electric Vehicles By Thilak SENANAYAKE	[View] [Download]
Abstract: An improved circuit topology of quasi Z-source inverter is presented that will meet the requirements and features of the Hybrid / Electric vehicle power control system. It is able to perform one pulse control for motor drive control depending on the drive condition of a motor which cannot be achieved from the conventional quasi Z-source inverter.

	Switched reluctance motor controller for light electric vehicles By Pere ANDRADA	[View] [Download]
Abstract: Nowadays, switched reluctance motor drives are one of the most promising alternatives for the elimination of permanent magnets in the electric traction systems, due to their well-known advantages such as simple and rugged construction, high efficiency, speed torque characteristic well adapted to traction needs and despite their drawbacks high torque ripple and high acoustic noise. Unfortunately, nowadays, the lack of commercial controllers intended for switched reluctance motors slows down its use as power traction unit. This paper tries to overcome this barrier proposing a specific controller, understood as the assembly of electronic power converter and control unit, for electric light vehicles. First, the specifications of the controller will be exposed then a comprehensive description of the architecture of the controller and details about the choice of its components will be given. Finally, experimental results will be shown in order to demonstrate its suitability as a SRM controller for light electric vehicles.

	The potential for power quality problem mitigation through STATCOM (BESS-STATCOM) By Arsalan hussain ZAIDI	[View] [Download]
Abstract: Consideration of spatial and temporal diversity of EV charging demand has been demonstrated to reducethe estimating impacts on the distribution networks. The data formulation is based on impact studies ofElectrical vehicles (EVs) on distribution networks. It is suggested that Distribution System Operator (DSO) could benefit for new innovation/advancement in the market (BESS-STATCOM) in a way that makes networks more reliable/robust, In this regard such innovation creates more opportunities for demand side management, reduces planning uncertainties associated with stochastic nature of EV charging and makes space for demand side management. This work considers probabilistic load flow in a representative unbalanced distribution network and through Monte Carlo simulation increased the hosting capacity for DG/EV is considered in an Irish/UK context. Furthermore, this paper considers the potential for a distribution network deployed STATCOM in supporting EV penetration, while maintaining appropriate power quality (voltage) standards. To reduce the computation burden of Monte Carlo simulation an alternative (novel but simple) method is applied. In terms of the Irish/UK DSO perspective, this work will help to increase the hosting capacity of DG/EV without breaching power quality limits.