EPE Association: EPE 2003 - Topic 12h: Modelling and Simulation

EPE 2003 - Topic 12h: Modelling and Simulation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2003 - Conference > EPE 2003 - Topic 12: POWER ELECTRONICS IN GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY > EPE 2003 - Topic 12h: Modelling and Simulation

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   Simulation of power quality issues in more electric aircraft actuator supplies
By A.M. Cross; A.J. Forsyth; D.R. Trainer; N. Baydar [View]
[Download]

Abstract: To examine the detailed operation of the power distribution network in a future more electric aircraft that employs electric actuation systems, a Micro-Cap SPICE simulation is developed for one of the essential buses. Particular attention is paid to model accurately the most important effects that influence system power quality. Representative system and flight data are used to illustrate the operation of the simulation and to assess the power quality conditions within the network as the flight control surfaces are deployed. The results illustrate the importance of correct cable sizing to ensure stable operation of actuators during transient conditions.

   Strategies to reduce torque and current ripples of transverse flux permanent magnet generators for wind turbine applications
By U. Werner; H. Raffel; O. Harling; N. Parspour; B. Orlik [View]
[Download]

Abstract: This paper deals with the minimization of torque ripples for new types of transverse flux machines. The strategies investigated are the variation of the machine geometry and the optimization of current waveforms. This is shown in the results of three-dimensional field simulations, which are verified by an analytical model.

   Transformer modelling by half-order systems
By D. Riu; P. Guérin; N. Retière [View]
[Download]

Abstract: The flowing of induced currents in power transformer, especially in their magnetic core, implies an increase in the order of the equivalent circuits used to model their frequency response. But physical meanings of the circuit parameters are often lost. In this paper, a new dynamic model of eddy-currents developing in the magnetic core of a power transformer is presented. This model is based on the resolution of the diffusion equation in the case of a ferromagnetic conductive material, using the half-order derivative systems. The new frequency model of transformer is available on a wide range of frequencies and is described by few parameters. The model has been applied and validated on a 4 kVA power transformer.

   State-variable representation, simulation and control of the doubly-fed induction generator
By E. Delaleau; E. Monmasson; J.-P. Louis [View]
[Download]

Abstract: This paper aims to understand several facts about the doubly-fed induction machine in generator operation. The state-variable representation, the stability, the simulation and a simple control are presented.

   Modelling and analyzing capacitor commutated converters for high transmission capacities
By H. Mueller; G. Balzer

Abstract: The main focus of this study is an electrical interconnection between two large asynchronous power systems. As an example the extension of the European power system UCTE in an eastward direction is investigated, and technical concepts are shown for realizing a high-power transmission system from Germany to Russia over the distance of 2000 km. Thereby the different considerations and requirements lead to the maximum power capacity which is the basic parameter of the system. For this high-power transmission a model for a HVDC transmission system is developed having a rated dc power of 4000 MW. With this configuration the connection points to the inverter side network can become weak and there can occur stability problems of the HVDC. For this reason besides the conventional HVDC converter the technology of capacitor commutated converters (CCC) is presented and the configuration of the CCC is described. For both options a model for the transmission system is developed and verified. The steady-state as well as transient behavior is analyzed and the results of the simulations are shown. The advantages of the CCC are indicated for high-power transmissions especially when operated at weak ac networks.

   Computer simulations of the power supply for the superconducting coils of HELIAS stellarator fusion reactor
By A. Wieczorek; E. Harmeyer; G.Linhofer [View]
[Download]

Abstract: The goal of HELIAS fusion power plant is to deliver electric power to the grid. For magnetic confinement of the hot plasma a superconducting coil system is used. Power supplies are necessary to provide charge and discharge and to stabilize the coil current during operation. Computer simulations of the power supplies have been done with the SIMPLORER code. The computation of induced eddy currents in the structure during transient processes are transformed into electric network analysis by means of the Finite Element Network (FEN) method. This approximation allows the investigation of the whole system including power supplies and passive structures.

   Real time simulator: a help tool for tests and commissioning
By S. Siala; C. Bordas; M.F. Benkhoris; B. Gollentz [View]
[Download]

Abstract: This paper deals with real time simulator that used for test of new algorithm control. As an example, a simulator of a Stato Var Compensator is carried out. Several methods of modeling are explored, in order to optimize the execution time and to automate the extensibility of the model according to the number of passive filters. The state matrix of the model is diagonal per block. A method at constant execution time is elaborate. It gives a good compromise precision/performances.. A method of variable step simulation for Range-Kutta method is presented. That improves the accuracy of thyristor bridge waveform, running on DSP board with 666µs sampling time. Simulation and experimental results show the high performances of the simulator and the great interest of this help tool for manufactory pre-tuning and commissioning. The simulator is integrated into the industrial product and validated on an experimental model of Stato Var Compensator

EPE 2003 - Topic 12h: Modelling and Simulation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2003 - Conference > EPE 2003 - Topic 12: POWER ELECTRONICS IN GENERATION, TRANSMISSION AND DISTRIBUTION OF ELECTRICAL ENERGY > EPE 2003 - Topic 12h: Modelling and Simulation
	[return to parent folder]

	Simulation of power quality issues in more electric aircraft actuator supplies By A.M. Cross; A.J. Forsyth; D.R. Trainer; N. Baydar	[View] [Download]
Abstract: To examine the detailed operation of the power distribution network in a future more electric aircraft that employs electric actuation systems, a Micro-Cap SPICE simulation is developed for one of the essential buses. Particular attention is paid to model accurately the most important effects that influence system power quality. Representative system and flight data are used to illustrate the operation of the simulation and to assess the power quality conditions within the network as the flight control surfaces are deployed. The results illustrate the importance of correct cable sizing to ensure stable operation of actuators during transient conditions.

	Strategies to reduce torque and current ripples of transverse flux permanent magnet generators for wind turbine applications By U. Werner; H. Raffel; O. Harling; N. Parspour; B. Orlik	[View] [Download]
Abstract: This paper deals with the minimization of torque ripples for new types of transverse flux machines. The strategies investigated are the variation of the machine geometry and the optimization of current waveforms. This is shown in the results of three-dimensional field simulations, which are verified by an analytical model.

	Transformer modelling by half-order systems By D. Riu; P. Guérin; N. Retière	[View] [Download]
Abstract: The flowing of induced currents in power transformer, especially in their magnetic core, implies an increase in the order of the equivalent circuits used to model their frequency response. But physical meanings of the circuit parameters are often lost. In this paper, a new dynamic model of eddy-currents developing in the magnetic core of a power transformer is presented. This model is based on the resolution of the diffusion equation in the case of a ferromagnetic conductive material, using the half-order derivative systems. The new frequency model of transformer is available on a wide range of frequencies and is described by few parameters. The model has been applied and validated on a 4 kVA power transformer.

	State-variable representation, simulation and control of the doubly-fed induction generator By E. Delaleau; E. Monmasson; J.-P. Louis	[View] [Download]
Abstract: This paper aims to understand several facts about the doubly-fed induction machine in generator operation. The state-variable representation, the stability, the simulation and a simple control are presented.

	Modelling and analyzing capacitor commutated converters for high transmission capacities By H. Mueller; G. Balzer
Abstract: The main focus of this study is an electrical interconnection between two large asynchronous power systems. As an example the extension of the European power system UCTE in an eastward direction is investigated, and technical concepts are shown for realizing a high-power transmission system from Germany to Russia over the distance of 2000 km. Thereby the different considerations and requirements lead to the maximum power capacity which is the basic parameter of the system. For this high-power transmission a model for a HVDC transmission system is developed having a rated dc power of 4000 MW. With this configuration the connection points to the inverter side network can become weak and there can occur stability problems of the HVDC. For this reason besides the conventional HVDC converter the technology of capacitor commutated converters (CCC) is presented and the configuration of the CCC is described. For both options a model for the transmission system is developed and verified. The steady-state as well as transient behavior is analyzed and the results of the simulations are shown. The advantages of the CCC are indicated for high-power transmissions especially when operated at weak ac networks.

	Computer simulations of the power supply for the superconducting coils of HELIAS stellarator fusion reactor By A. Wieczorek; E. Harmeyer; G.Linhofer	[View] [Download]
Abstract: The goal of HELIAS fusion power plant is to deliver electric power to the grid. For magnetic confinement of the hot plasma a superconducting coil system is used. Power supplies are necessary to provide charge and discharge and to stabilize the coil current during operation. Computer simulations of the power supplies have been done with the SIMPLORER code. The computation of induced eddy currents in the structure during transient processes are transformed into electric network analysis by means of the Finite Element Network (FEN) method. This approximation allows the investigation of the whole system including power supplies and passive structures.

	Real time simulator: a help tool for tests and commissioning By S. Siala; C. Bordas; M.F. Benkhoris; B. Gollentz	[View] [Download]
Abstract: This paper deals with real time simulator that used for test of new algorithm control. As an example, a simulator of a Stato Var Compensator is carried out. Several methods of modeling are explored, in order to optimize the execution time and to automate the extensibility of the model according to the number of passive filters. The state matrix of the model is diagonal per block. A method at constant execution time is elaborate. It gives a good compromise precision/performances.. A method of variable step simulation for Range-Kutta method is presented. That improves the accuracy of thyristor bridge waveform, running on DSP board with 666µs sampling time. Simulation and experimental results show the high performances of the simulator and the great interest of this help tool for manufactory pre-tuning and commissioning. The simulator is integrated into the industrial product and validated on an experimental model of Stato Var Compensator