EPE Association: EPE-PEMC 2008 - Topic: Energy Management of Hybrid Power System : Economic Contraints and New Architectures

EPE-PEMC 2008 - Topic: Energy Management of Hybrid Power System : Economic Contraints and New Architectures
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2008 - Conference > EPE-PEMC 2008 - Topic: Energy Management of Hybrid Power System : Economic Contraints and New Architectures

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   Cost Evaluation of Generator-Set with Energy Storage for 4Q-Load
By Freek J. F.Baalbergen and Pavol Bauer [View]
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Abstract: Diesel generators in small electricity grids are not always used in an efficient way. The reason for this is twofold. First of all the efficiency of a diesel generator is dependent on the ratio between the average power and the peak power of the generator. The smaller this ratio, the lower the efficiency. Furthermore some loads can regenerate energy. In small grids this energy is mostly not needed elsewhere and should be dissipated. A solution solving both above mentioned problems is using an energy storage device in the system. This storage can be used for peak shaving and storing regenerated energy. This paper focuses on the costs of a generator-set with energy storage. This calculation is done for the general case and for six different power management strategies: Only Generator, Peak Power Shaving, Dynamic Solution, Max On or Off, Average Power and Only Storage. Calculation of the costs shows that adding an energy storage device lowers the cost for all methods. Calculations show that the Max On or Off method is the best choice.

   Development of Electrical System for Hybrid Vehicles Using the Free-swinging Piston Engine and Oscillating Rotating Generator
By Sigitas Kudarauskas [View]
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Abstract: The original free-swinging piston engine with the oscillating rotating generator distinguishes by its compactness, minimum frictional losses, full-balanced mechanical system, possibility of four-stroke operation of the engine, possibility of the multifuel operation of the engine, optimal magnetic circuit of the electrical generator, etc. Because the engine can optimally operate over whole range of the output power, it enables to improve electrical system of the hybrid vehicle by usage of supercapacitors and optimised energy flows. In this way the competitive hybrid electric vehicle can be created.

   First Approach for a Fault Tolerant Power Converter Interface for Multi-Stack PEM Fuel Cell Generator in Transportation Systems
By Alexandre De Bernardinis [View]
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Abstract: This paper presents a fault tolerant architecture for connecting PEM fuel cells inside an hybrid on-board power generation system. As a first approach, the problematic of fault tolerance for multi-stack PEM fuel cell power systems dedicated to battery-hybrid transportation systems will be considered from both sides which closely interact: the fuel cell generator in case of faulty working and the power converter interface. For the first case, the use of antiparallel by-pass diodes have proved to be a solution and are tested on series assembly of 2-cell (experimental validation) and 20-cell (simulation) PEM fuel cell stacks. For the second one, the technological choice of an interleaved multi-phase boost converter interface with backup strategies and fault-tolerance management will be detailed. One of the great issues of these converter architectures is also to give new possibilities for power management and coordination with the battery inside this hybrid transportation system.

   Integrating Renewable Energy Sources and Storage into Isolated Diesel Generator Supplied Electric Power Systems
By Chad Abbey, Jonathan Robinson and Géza Joós [View]
[Download]

Abstract: The integration of renewable energy sources, such as wind and solar energy, into isolated power systems, supplying remote communities, offers a number of economic and environmental advantages. Energy storage systems (ESS) can be used to offset the variability of the energy supplied by renewables. This paper presents a design methodology for configuring and sizing the various components added to a diesel generator supplied electric power system. A design example is given for a remote community, including parametric studies of the economics associated with optimizing the size of battery storage, considering all the components of the system. Control options and techniques for suitable energy storage systems are presented.

   Performance Comparison of Different Wind Generator Based Hybrid Systems
By Vincent Courtecuisse [View]
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Abstract: In this paper a graphical modelling tool is proposed to develop a fuzzy logic based supervisor. This tool facilitates the analysis and the determination of fuzzy control algorithms adapted to complex hybrid systems. To explain this methodology, the association of wind generators, dispersed generator and storage systems are considered. The performance of this supervisor is shown with the help of simulations. A comparison of different topologies is also proposed.

   Power Flow Control in Different Time Scales for a Wind/Hydrogen/Super-Capacitors Based Active Hybrid Power System
By Zhou Tao [View]
[Download]

Abstract: A hybrid power system is proposed and is based on wind energy conversion system with hydrogen based long-term storage unit and super-capacitor based fastdynamic storage unit. A power management algorithm is organized in different time scales for its normal operating mode. Four studied cases show that, the long-term storage can compensate or absorb the difference between the generated fluctuating wind power and the grid power consumption in a long time range, and the fast-dynamic storage can smooth the power delivered to the grid in a short time range. It proves also the necessity of the three types of power sources.

EPE-PEMC 2008 - Topic: Energy Management of Hybrid Power System : Economic Contraints and New Architectures
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2008 - Conference > EPE-PEMC 2008 - Topic: Energy Management of Hybrid Power System : Economic Contraints and New Architectures
	[return to parent folder]

	Cost Evaluation of Generator-Set with Energy Storage for 4Q-Load By Freek J. F.Baalbergen and Pavol Bauer	[View] [Download]
Abstract: Diesel generators in small electricity grids are not always used in an efficient way. The reason for this is twofold. First of all the efficiency of a diesel generator is dependent on the ratio between the average power and the peak power of the generator. The smaller this ratio, the lower the efficiency. Furthermore some loads can regenerate energy. In small grids this energy is mostly not needed elsewhere and should be dissipated. A solution solving both above mentioned problems is using an energy storage device in the system. This storage can be used for peak shaving and storing regenerated energy. This paper focuses on the costs of a generator-set with energy storage. This calculation is done for the general case and for six different power management strategies: Only Generator, Peak Power Shaving, Dynamic Solution, Max On or Off, Average Power and Only Storage. Calculation of the costs shows that adding an energy storage device lowers the cost for all methods. Calculations show that the Max On or Off method is the best choice.

	Development of Electrical System for Hybrid Vehicles Using the Free-swinging Piston Engine and Oscillating Rotating Generator By Sigitas Kudarauskas	[View] [Download]
Abstract: The original free-swinging piston engine with the oscillating rotating generator distinguishes by its compactness, minimum frictional losses, full-balanced mechanical system, possibility of four-stroke operation of the engine, possibility of the multifuel operation of the engine, optimal magnetic circuit of the electrical generator, etc. Because the engine can optimally operate over whole range of the output power, it enables to improve electrical system of the hybrid vehicle by usage of supercapacitors and optimised energy flows. In this way the competitive hybrid electric vehicle can be created.

	First Approach for a Fault Tolerant Power Converter Interface for Multi-Stack PEM Fuel Cell Generator in Transportation Systems By Alexandre De Bernardinis	[View] [Download]
Abstract: This paper presents a fault tolerant architecture for connecting PEM fuel cells inside an hybrid on-board power generation system. As a first approach, the problematic of fault tolerance for multi-stack PEM fuel cell power systems dedicated to battery-hybrid transportation systems will be considered from both sides which closely interact: the fuel cell generator in case of faulty working and the power converter interface. For the first case, the use of antiparallel by-pass diodes have proved to be a solution and are tested on series assembly of 2-cell (experimental validation) and 20-cell (simulation) PEM fuel cell stacks. For the second one, the technological choice of an interleaved multi-phase boost converter interface with backup strategies and fault-tolerance management will be detailed. One of the great issues of these converter architectures is also to give new possibilities for power management and coordination with the battery inside this hybrid transportation system.

	Integrating Renewable Energy Sources and Storage into Isolated Diesel Generator Supplied Electric Power Systems By Chad Abbey, Jonathan Robinson and Géza Joós	[View] [Download]
Abstract: The integration of renewable energy sources, such as wind and solar energy, into isolated power systems, supplying remote communities, offers a number of economic and environmental advantages. Energy storage systems (ESS) can be used to offset the variability of the energy supplied by renewables. This paper presents a design methodology for configuring and sizing the various components added to a diesel generator supplied electric power system. A design example is given for a remote community, including parametric studies of the economics associated with optimizing the size of battery storage, considering all the components of the system. Control options and techniques for suitable energy storage systems are presented.

	Performance Comparison of Different Wind Generator Based Hybrid Systems By Vincent Courtecuisse	[View] [Download]
Abstract: In this paper a graphical modelling tool is proposed to develop a fuzzy logic based supervisor. This tool facilitates the analysis and the determination of fuzzy control algorithms adapted to complex hybrid systems. To explain this methodology, the association of wind generators, dispersed generator and storage systems are considered. The performance of this supervisor is shown with the help of simulations. A comparison of different topologies is also proposed.

	Power Flow Control in Different Time Scales for a Wind/Hydrogen/Super-Capacitors Based Active Hybrid Power System By Zhou Tao	[View] [Download]
Abstract: A hybrid power system is proposed and is based on wind energy conversion system with hydrogen based long-term storage unit and super-capacitor based fastdynamic storage unit. A power management algorithm is organized in different time scales for its normal operating mode. Four studied cases show that, the long-term storage can compensate or absorb the difference between the generated fluctuating wind power and the grid power consumption in a long time range, and the fast-dynamic storage can smooth the power delivered to the grid in a short time range. It proves also the necessity of the three types of power sources.