EPE Association: EPE 1997 â€“ 44: Dialogue Session DS9a: ENERGY SYSTEM MANAGEMENT, USER APPLICATIONS EXPERIENCES, MODELING AND SIMULATION

EPE 1997 â€“ 44: Dialogue Session DS9a: ENERGY SYSTEM MANAGEMENT, USER APPLICATIONS EXPERIENCES, MODELING AND SIMULATION
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 â€“ 44: Dialogue Session DS9a: ENERGY SYSTEM MANAGEMENT, USER APPLICATIONS EXPERIENCES, MODELING AND SIMULATION

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   INVESTIGATION OF THE INTERFERENCE OF CONTROLLED ELECTRICAL DRIVES WITH THE POWER SYSTEM BY SIMULATOR COUPLING
By D. Haenelt; V. Muller; T. Roeseler [View]
[Download]

Abstract: Modern concepts of line-friendly electrical drives or the design of local power systems require a holistic mode ling of the electrical system. For a lot of applications it is necessary to investigate the action chain consisting of power supply system - inverter- contrqlled electrical drive. The paper describes a simulation tool designed specifically to meet this purpose. It consists of a network analysis program for the simulation of the power supply systems and a block-oriented simulation program for modeling the inverters and electrical drives. The efficiency of the new simulation tool is demonstrated by two examples: the starting-up of an asynchronous motor at an industrial network with different short circuit capacities and the interaction of a controlled d.c. drive with an industrial network.

   MODELING AND SIMULATION OF INDUCTION MOTOR DRIVE UNDER INVERTER FAULT OPERATIONS
By N. Retiere; L. Gerbaud; P.J. Chrzan; D. Roye; P. Mannevy [View]
[Download]

Abstract: The study of inverter fault operations of a voltage source inverter induction motor drive is of first importance to improve the system reliability or to propose diagnosis strategies. Hence, a systematic and detailed analysis of the inverter fault modes is necessary in simulation. The issues of modeling and simulation of the drive under faulty operations are emphasized in this paper. A modeling and simulation package called GENTIANE is then presented. This package provides an automated model building and fast simulations. The modeling and the simulation of a 1.5 MW induction motor drive are presented and some results of inverter fault simulation are discussed. An experimental validation is finally carried out for a 2.2 kW industrial drive.

   FUNDAMENTAL COMPONENT MEASUREMENT IN POWER SUPPLIES WITH HIGH HARMONIC CONTENT
By W. Deleroi; J.B. Woudstra [View]
[Download]

Abstract: A digital measurement system for measuring voltage and current vectors together with the total distributed instantaneous power will be introduced. This measuring system together with some calculation possibilities makes it possible to combine the three phase values of voltage and current to a vector showing at all points the amplitude of a rotating or standing still vector together with the total instantaneous power. Averaging the vector over a total as well over half of a fundamental period all higher harmonic modulation disappear. The fundamental voltage or current vector rests with it's low frequency modulation caused by frequency changing or control strategies. Real measurements demonstrate all the possibilities of this measuring system. With high speed microcontroller an online measuring system can be made.

   HIGH-PERFORMANCE SOFTWARE ENVIRONMENT FOR POWER ELECTRONIC SIMULATIONS
By J. Nieznanski; R. Szczesny; K. Iwan; M. Ronkowski [View]
[Download]

Abstract: This paper describes a full-featured software package, developed around the TCad simulator, and designed expressly for power electronic simulations. Basic information is given on the TCad enviromnent and its modeling constructs. The major assets of TCad are robust nnmerics, adequate models of switches and electrical machines, high level ofprogranll1ability, and a user-friendly graphical interface. The simulation examples contained in this paper demonstrate the use of the package in exploratory analysis, nnmerical optimization, and fault analysis of inverter fed induction motor drives. Sample juxtaposition of simulation and experimental results is also provided.

   A METHODOLOGY USING CONSTRAINED OPTIMISATION TECHNIQUES FOR THE DESIGN OF STATIC CONVERTERS
By S. Bergeon; L. Gerbaud; F. Wurtz; J. Roudet [View]
[Download]

Abstract: This paper deals with a new approach for the sizing of components of a given static converter structure and operating mode. The methodology is based on constrained optimisation techniques, and it integrates simulation and symbolic calculation package. TI1e ways and means of this methodology are presented. Results of the approach applied to the structure of the forward resonant converter will be discussed.

   MICROCOMPUTER VOLTAGE CONTROL FOR DIESEL ELECTRICAL AGGREGATE
By G. Erceg; R. Erceg; M. MiletiÃ© [View]
[Download]

Abstract: In the paper a digital solution of the voltage control system for a diesel electrical aggregate with brushless synchronous generator and independent excitation ~s describ~d. System configuration, software configuration and control functions with structure of apphed algorithm are presented. Performance characteristics of digital control system were tested on a laboratory model with 54kVA generator and characteristic loads.

   A NEW CONCEPT FOR THE CONFIGURATION OF DRIVE SYSTEMS AND POWER ELECTRONICS APPLICATIONS IN INDUSTRIAL ENVIRONMENTS
By A. Kern [View]
[Download]

Abstract: This paper will present a concept for designing complex manufacturing systems involving large numbers of interacting drive systems and power electronics equipment. The aim is to present a concept which enables the engineer to design applications and the information flow of manufacturing equipment application wide. The processed information includes set values, control algorithms and measurement data. The concept enables engineers to change those set values and control algorithms swiftly and without major redesign, adapt a whole set of drives to new requirements and provide the operator with a homogenous user interface for controlling and handling the production process. The new approach furthermore highly increases the re-usability of major application components ranging from monitoring software to control algorithms and machine topology, reducing the costs of application design and development greatly.

   MAIN FAIL SELECTION FOR UTILITY CONNECTED INVERTERS
By J. Buettner; U. Kirchner; G. Berger; J. Petzoldt [View]
[Download]

Abstract: For line coupled inverters it is important to implement an automatic disconnection unit of the inverter in case of breakdown or failure of the public power system. This paper describes a control method which detects a failure of the mains by observation of control loop values and gives an appropriate reaction. This method is based on a vector control algorithm who is able to control the amount and the phase angle of a three phase current referring to the voltage of the mains (at the point of common coupling).

   INFLUENCE OF CURRENT TRANSITION FUNCTIONS ON THE DIMINUTION OF RADIATED AND CONDUCTED EMISSIONS IN POWER ELECTRONIC CIRCUITS
By F. Reby; R. Baumier; M. Amberg [View]
[Download]

Abstract: High frequency emissions created by static converters depend greatly on the current waveform in the conductors linked to the floating vohage node in the commutation cells. In this paper, we analyze the influence of the current gradient on the high frequency current harmonics and demonstrate the advantage of waveforms, which have derivatives with no discontinuities. This demonstration will enable us to envisage the development of intelligent control of specially adapted switches.

   A FUNCTIONAL DESCRIPTION FOR STATIC CONVERTER STRUCTURES DESIGN
By C. Lechevalier; L. Gerbaud; J. Bigeon [View]
[Download]

Abstract: Nowadays, the designer uses a set of existing structures to design a complete static converter structure. The resulting structures are generally very attached to a specific technology and are not very new. To aid the user to build a structure, the paper proposes a functional description in order to take in account the technological aspect very later in the design process. In the future, the goal of this approach is to build an expert system for static converter structure design.

EPE 1997 â€“ 44: Dialogue Session DS9a: ENERGY SYSTEM MANAGEMENT, USER APPLICATIONS EXPERIENCES, MODELING AND SIMULATION
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 â€“ 44: Dialogue Session DS9a: ENERGY SYSTEM MANAGEMENT, USER APPLICATIONS EXPERIENCES, MODELING AND SIMULATION
	[return to parent folder]

	INVESTIGATION OF THE INTERFERENCE OF CONTROLLED ELECTRICAL DRIVES WITH THE POWER SYSTEM BY SIMULATOR COUPLING By D. Haenelt; V. Muller; T. Roeseler	[View] [Download]
Abstract: Modern concepts of line-friendly electrical drives or the design of local power systems require a holistic mode ling of the electrical system. For a lot of applications it is necessary to investigate the action chain consisting of power supply system - inverter- contrqlled electrical drive. The paper describes a simulation tool designed specifically to meet this purpose. It consists of a network analysis program for the simulation of the power supply systems and a block-oriented simulation program for modeling the inverters and electrical drives. The efficiency of the new simulation tool is demonstrated by two examples: the starting-up of an asynchronous motor at an industrial network with different short circuit capacities and the interaction of a controlled d.c. drive with an industrial network.

	MODELING AND SIMULATION OF INDUCTION MOTOR DRIVE UNDER INVERTER FAULT OPERATIONS By N. Retiere; L. Gerbaud; P.J. Chrzan; D. Roye; P. Mannevy	[View] [Download]
Abstract: The study of inverter fault operations of a voltage source inverter induction motor drive is of first importance to improve the system reliability or to propose diagnosis strategies. Hence, a systematic and detailed analysis of the inverter fault modes is necessary in simulation. The issues of modeling and simulation of the drive under faulty operations are emphasized in this paper. A modeling and simulation package called GENTIANE is then presented. This package provides an automated model building and fast simulations. The modeling and the simulation of a 1.5 MW induction motor drive are presented and some results of inverter fault simulation are discussed. An experimental validation is finally carried out for a 2.2 kW industrial drive.

	FUNDAMENTAL COMPONENT MEASUREMENT IN POWER SUPPLIES WITH HIGH HARMONIC CONTENT By W. Deleroi; J.B. Woudstra	[View] [Download]
Abstract: A digital measurement system for measuring voltage and current vectors together with the total distributed instantaneous power will be introduced. This measuring system together with some calculation possibilities makes it possible to combine the three phase values of voltage and current to a vector showing at all points the amplitude of a rotating or standing still vector together with the total instantaneous power. Averaging the vector over a total as well over half of a fundamental period all higher harmonic modulation disappear. The fundamental voltage or current vector rests with it's low frequency modulation caused by frequency changing or control strategies. Real measurements demonstrate all the possibilities of this measuring system. With high speed microcontroller an online measuring system can be made.

	HIGH-PERFORMANCE SOFTWARE ENVIRONMENT FOR POWER ELECTRONIC SIMULATIONS By J. Nieznanski; R. Szczesny; K. Iwan; M. Ronkowski	[View] [Download]
Abstract: This paper describes a full-featured software package, developed around the TCad simulator, and designed expressly for power electronic simulations. Basic information is given on the TCad enviromnent and its modeling constructs. The major assets of TCad are robust nnmerics, adequate models of switches and electrical machines, high level ofprogranll1ability, and a user-friendly graphical interface. The simulation examples contained in this paper demonstrate the use of the package in exploratory analysis, nnmerical optimization, and fault analysis of inverter fed induction motor drives. Sample juxtaposition of simulation and experimental results is also provided.

	A METHODOLOGY USING CONSTRAINED OPTIMISATION TECHNIQUES FOR THE DESIGN OF STATIC CONVERTERS By S. Bergeon; L. Gerbaud; F. Wurtz; J. Roudet	[View] [Download]
Abstract: This paper deals with a new approach for the sizing of components of a given static converter structure and operating mode. The methodology is based on constrained optimisation techniques, and it integrates simulation and symbolic calculation package. TI1e ways and means of this methodology are presented. Results of the approach applied to the structure of the forward resonant converter will be discussed.

	MICROCOMPUTER VOLTAGE CONTROL FOR DIESEL ELECTRICAL AGGREGATE By G. Erceg; R. Erceg; M. MiletiÃ©	[View] [Download]
Abstract: In the paper a digital solution of the voltage control system for a diesel electrical aggregate with brushless synchronous generator and independent excitation ~s describ~d. System configuration, software configuration and control functions with structure of apphed algorithm are presented. Performance characteristics of digital control system were tested on a laboratory model with 54kVA generator and characteristic loads.

	A NEW CONCEPT FOR THE CONFIGURATION OF DRIVE SYSTEMS AND POWER ELECTRONICS APPLICATIONS IN INDUSTRIAL ENVIRONMENTS By A. Kern	[View] [Download]
Abstract: This paper will present a concept for designing complex manufacturing systems involving large numbers of interacting drive systems and power electronics equipment. The aim is to present a concept which enables the engineer to design applications and the information flow of manufacturing equipment application wide. The processed information includes set values, control algorithms and measurement data. The concept enables engineers to change those set values and control algorithms swiftly and without major redesign, adapt a whole set of drives to new requirements and provide the operator with a homogenous user interface for controlling and handling the production process. The new approach furthermore highly increases the re-usability of major application components ranging from monitoring software to control algorithms and machine topology, reducing the costs of application design and development greatly.

	MAIN FAIL SELECTION FOR UTILITY CONNECTED INVERTERS By J. Buettner; U. Kirchner; G. Berger; J. Petzoldt	[View] [Download]
Abstract: For line coupled inverters it is important to implement an automatic disconnection unit of the inverter in case of breakdown or failure of the public power system. This paper describes a control method which detects a failure of the mains by observation of control loop values and gives an appropriate reaction. This method is based on a vector control algorithm who is able to control the amount and the phase angle of a three phase current referring to the voltage of the mains (at the point of common coupling).

	INFLUENCE OF CURRENT TRANSITION FUNCTIONS ON THE DIMINUTION OF RADIATED AND CONDUCTED EMISSIONS IN POWER ELECTRONIC CIRCUITS By F. Reby; R. Baumier; M. Amberg	[View] [Download]
Abstract: High frequency emissions created by static converters depend greatly on the current waveform in the conductors linked to the floating vohage node in the commutation cells. In this paper, we analyze the influence of the current gradient on the high frequency current harmonics and demonstrate the advantage of waveforms, which have derivatives with no discontinuities. This demonstration will enable us to envisage the development of intelligent control of specially adapted switches.

	A FUNCTIONAL DESCRIPTION FOR STATIC CONVERTER STRUCTURES DESIGN By C. Lechevalier; L. Gerbaud; J. Bigeon	[View] [Download]
Abstract: Nowadays, the designer uses a set of existing structures to design a complete static converter structure. The resulting structures are generally very attached to a specific technology and are not very new. To aid the user to build a structure, the paper proposes a functional description in order to take in account the technological aspect very later in the design process. In the future, the goal of this approach is to build an expert system for static converter structure design.