EPE Association: EPE 2017 - DS2e: Estimation and Identification methods

EPE 2017 - DS2e: Estimation and Identification methods
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 03: Measurement and Control > EPE 2017 - DS2e: Estimation and Identification methods

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   A Comparison of Two Methods for Sensorless Position Estimation Using the Electromagnetic Force at an Electrically Excited Synchronous Machine
By Johannes SCHUSTER [View]
[Download]

Abstract: This paper presents the comparison of two different methods for sensorless position estimation at anelectrically excited synchronous machine for electrical vehicle applications. Both methods use theelectromagnetic force. The first method tracks the induced voltage and the second uses a flux model toestimate the rotor position.

   A Temperature Compensated Overcurrent and Short-Circuit Detection Method for SiC MOSFET modules
By Teresa BERTELSHOFER [View]
[Download]

Abstract: This paper presents an overcurrent and short-circuit (SC) detection method for high current SiC MOSFET modules. It adapts the existing desaturation detection (=UCE,desat method) known from IGBTs. These adjustments include separate detection paths for hard switching faults (HSF) and fault under load (FUL) as well as overcurrent. The necessity of a junction temperature compensation for detecting each type of fault (HSF, FUL or overcurrent = OC) is discussed.

   A transient model for electric devices not representable with rational transfer functions
By Alberto FERRO [View]
[Download]

Abstract: This paper presents a technique to model electric devices and systems, which cannot be represented adequately with rational transfer functions, to be integrated in electric transient simulations. Such technique has been successfully validated and exploited in the modeling and optimization phase of a fast switching converter with its load, which is a coil subject to skin, proximity and shielding effects. Furthermore, the possibility to use this technique in order to control such converter has been investigated, obtaining promising results.

   Adaptive Generalized Delayed Signal Cancellation Method for Phase-Sequence Estimation
By Massimo BONGIORNO [View]
[Download]

Abstract: The aim of this paper is to investigate the implementation of an adaptive generalized delayed signal cancellation (DSC) method for estimation of phase-sequence components. The proposed approach overcomes the intrinsic problems of the digital implementation of the classical DSC algorithm due to non-ideal selection of the sampling frequency and variations in the nominal system frequency. The derived algorithm is extended for estimation of harmonic components in the measured signal. The effectiveness of the proposed estimation method is validated through experimental results.

   Analytical derivation of poorly-damped eigenvalues in two-terminal VSC-HVDC systems
By Georgios STAMATIOU [View]
[Download]

Abstract: Under specific conditions, Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) systems can experience stability, or poor-damping related issues. Analytical investigation of the system eigenvalues can demonstrate the impact of physical or control parameters on the system stability. However, especially in case of high-order systems, such expressions are challenging to obtain and so extensive in form that they are impractical to use and cannot provide useful hints on the impact of single parameters on the system's stability. Therefore, current methods in power system analysis rather rely on a purely numerical approach to describe eigenvalues and are deprived of the benefits of the symbolic representation. This paper suggests a method to analytically describe a two-terminal VSC-HVDC link with respect to its dominant eigenvalues, providing a useful tool for the investigation of poorly-damped performance and system stability, by deriving compact analytical eigenvalue expressions.

   Kalman Filter Sensor Fusion for Multi-head Position Encoder
By Dariusz JANISZEWSKI [View]
[Download]

Abstract: This paper presents an Kalman Filter Data Fusion methodology and investigation for high dynamics and high precision multi-head angular position encoder. The proposed algorithm based on measurement of four dependent Read Heads and encoder ring for one mechanical shaft of high precision system with electric drive. The global fusion of proposed estimation provide computed value of position and additional important information about speed and sum of disturbances, which can be used for further control.The performances of proposed fusion algorithm compared into other known industrial methods, with leading effects.

   Smart and Energy Efficient Air-Conditioning System
By Shady KHALIL [View]
[Download]

Abstract: This paper proposes a novel embedded real-time, smart, active, and efficient air conditioning system for minimizing energy consumption and cost per day while considering customer preferences, comfort level, and health aspect. Therefore, the presented online algorithm is aimed to reach those goals by assigning both behavioral modification and technological modification programs that are equipped with embedded tools to collect and monitor all energy information. The proposed system is investigated using Matlab/Simulink software in order to verify the basic characteristics of the energy consumed by air conditioning system toward minimizing the energy consumption and smartly managing the energy consumption of air conditioner. Experimental results and real-time implementation are conducted to demonstrate the validity of the proposed system.

   Variable-Speed-Drive-Based Soft Sensor for the Twin-Rotary Screw-Compressor Output Pressure
By Santeri PÖYHÖNEN [View]
[Download]

Abstract: Compressed-air systems account for a notable share of the industrial electricity consumption. At thesame time, a significant potential to improve the energy efficiency of compressed-air generation hasbeen recognized. Variable-speed drives provide an efficient and flexible way to regulate the output ofa screw compressor and to match the typically intermittent demand of compressed air. In addition tocapacity control, drive estimates for the electric motor operation can be used in soft-sensing methods.This paper proposes a novel soft sensor, which can monitor the output pressure of a twin-rotary screwcompressor based on the variable-speed drive's estimates for the compressor's rotational speed andshaft torque. First, the working principle of the soft sensor is explained in detail and suggestions forcommissioning, i.e. tuning it, are given. Finally, the feasibility of the soft sensor is verified withlaboratory measurements.

EPE 2017 - DS2e: Estimation and Identification methods
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 03: Measurement and Control > EPE 2017 - DS2e: Estimation and Identification methods
	[return to parent folder]

	A Comparison of Two Methods for Sensorless Position Estimation Using the Electromagnetic Force at an Electrically Excited Synchronous Machine By Johannes SCHUSTER	[View] [Download]
Abstract: This paper presents the comparison of two different methods for sensorless position estimation at anelectrically excited synchronous machine for electrical vehicle applications. Both methods use theelectromagnetic force. The first method tracks the induced voltage and the second uses a flux model toestimate the rotor position.

	A Temperature Compensated Overcurrent and Short-Circuit Detection Method for SiC MOSFET modules By Teresa BERTELSHOFER	[View] [Download]
Abstract: This paper presents an overcurrent and short-circuit (SC) detection method for high current SiC MOSFET modules. It adapts the existing desaturation detection (=UCE,desat method) known from IGBTs. These adjustments include separate detection paths for hard switching faults (HSF) and fault under load (FUL) as well as overcurrent. The necessity of a junction temperature compensation for detecting each type of fault (HSF, FUL or overcurrent = OC) is discussed.

	A transient model for electric devices not representable with rational transfer functions By Alberto FERRO	[View] [Download]
Abstract: This paper presents a technique to model electric devices and systems, which cannot be represented adequately with rational transfer functions, to be integrated in electric transient simulations. Such technique has been successfully validated and exploited in the modeling and optimization phase of a fast switching converter with its load, which is a coil subject to skin, proximity and shielding effects. Furthermore, the possibility to use this technique in order to control such converter has been investigated, obtaining promising results.

	Adaptive Generalized Delayed Signal Cancellation Method for Phase-Sequence Estimation By Massimo BONGIORNO	[View] [Download]
Abstract: The aim of this paper is to investigate the implementation of an adaptive generalized delayed signal cancellation (DSC) method for estimation of phase-sequence components. The proposed approach overcomes the intrinsic problems of the digital implementation of the classical DSC algorithm due to non-ideal selection of the sampling frequency and variations in the nominal system frequency. The derived algorithm is extended for estimation of harmonic components in the measured signal. The effectiveness of the proposed estimation method is validated through experimental results.

	Analytical derivation of poorly-damped eigenvalues in two-terminal VSC-HVDC systems By Georgios STAMATIOU	[View] [Download]
Abstract: Under specific conditions, Voltage Source Converter based High Voltage Direct Current (VSC-HVDC) systems can experience stability, or poor-damping related issues. Analytical investigation of the system eigenvalues can demonstrate the impact of physical or control parameters on the system stability. However, especially in case of high-order systems, such expressions are challenging to obtain and so extensive in form that they are impractical to use and cannot provide useful hints on the impact of single parameters on the system's stability. Therefore, current methods in power system analysis rather rely on a purely numerical approach to describe eigenvalues and are deprived of the benefits of the symbolic representation. This paper suggests a method to analytically describe a two-terminal VSC-HVDC link with respect to its dominant eigenvalues, providing a useful tool for the investigation of poorly-damped performance and system stability, by deriving compact analytical eigenvalue expressions.

	Kalman Filter Sensor Fusion for Multi-head Position Encoder By Dariusz JANISZEWSKI	[View] [Download]
Abstract: This paper presents an Kalman Filter Data Fusion methodology and investigation for high dynamics and high precision multi-head angular position encoder. The proposed algorithm based on measurement of four dependent Read Heads and encoder ring for one mechanical shaft of high precision system with electric drive. The global fusion of proposed estimation provide computed value of position and additional important information about speed and sum of disturbances, which can be used for further control.The performances of proposed fusion algorithm compared into other known industrial methods, with leading effects.

	Smart and Energy Efficient Air-Conditioning System By Shady KHALIL	[View] [Download]
Abstract: This paper proposes a novel embedded real-time, smart, active, and efficient air conditioning system for minimizing energy consumption and cost per day while considering customer preferences, comfort level, and health aspect. Therefore, the presented online algorithm is aimed to reach those goals by assigning both behavioral modification and technological modification programs that are equipped with embedded tools to collect and monitor all energy information. The proposed system is investigated using Matlab/Simulink software in order to verify the basic characteristics of the energy consumed by air conditioning system toward minimizing the energy consumption and smartly managing the energy consumption of air conditioner. Experimental results and real-time implementation are conducted to demonstrate the validity of the proposed system.

	Variable-Speed-Drive-Based Soft Sensor for the Twin-Rotary Screw-Compressor Output Pressure By Santeri PÖYHÖNEN	[View] [Download]
Abstract: Compressed-air systems account for a notable share of the industrial electricity consumption. At thesame time, a significant potential to improve the energy efficiency of compressed-air generation hasbeen recognized. Variable-speed drives provide an efficient and flexible way to regulate the output ofa screw compressor and to match the typically intermittent demand of compressed air. In addition tocapacity control, drive estimates for the electric motor operation can be used in soft-sensing methods.This paper proposes a novel soft sensor, which can monitor the output pressure of a twin-rotary screwcompressor based on the variable-speed drive's estimates for the compressor's rotational speed andshaft torque. First, the working principle of the soft sensor is explained in detail and suggestions forcommissioning, i.e. tuning it, are given. Finally, the feasibility of the soft sensor is verified withlaboratory measurements.