EPE Association: EPE 2016 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies

EPE 2016 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 09: Industry-Specific Energy Conversion and Conditioning Technologies > EPE 2016 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies

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   A new Modular Multilevel Converter for Medium Voltage High Power Oil & Gas Motor Drive Applications
By Max BEUERMANN [View]
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Abstract: Especially the Oil & Gas industry is looking for ways to increase the process productivity and energy efficiency. To realize these goals the electrification of the drive train is essential. Therefore variable speed drives (VFD) to control speed and torque of the compressors and pumps are used to reach a higher degree of process optimization.Currently several different topologies of Medium Voltage drives are available on the market. After becoming the predominat technology in self-commutated HVDC transmission systems the Modular Multilevel Converter (M2C) is now also entering the high power Medium Voltage drive market.The paper presents the first commercially available water-cooled Medium Voltage motor drive based on the M2C technology. To ensure that the performance of the whole drive system meets the performance requirements of the Oil & Gas industry, a system test in a back-to-back arrangement has been performed. The motor drive specific features and the HW are described. Measurement results from the back-to-back test of a 12 MW compressor drive are included, e.g. operation at low motor frequencies down to zero speed at high torque and voltage and current waveforms during a cell bypass event.

   Current Sharing inside a High Power IGBT Module at the Negative Temperature Coefficient Operating Region
By Panagiotis ASIMAKOPOULOS [View]
[Download]

Abstract: This work investigates the current sharing effect of a high power Soft Punch Through IGBT module in the Negative Temperature Coefficient region. The unbalanced current sharing between two of the substrates is demonstrated for different current and temperature levels and its impact on the thermal stressing of the device is evaluated. The results indicate that the current asymmetry does not lead to a significant thermal stressing unbalance between the substrates.

   Electrical model of carbon fibre reinforced polymers for the development of electrical protection systems for more electric aircraft.
By Catherine JONES [View]
[Download]

Abstract: Carbon fibre reinforced polymers (CFRP) are increasingly used for structures on aircraft due to their superior mechanical properties compared to traditional materials, such as aluminium. Additionally, in order to improve aircraft performance, there is a continued trend for electrically driven loads on aircraft, increasing the on-board electrical power generation capacity and complexity of the electrical power system, including a desire to increase voltage levels and move towards DC distribution systems.Central to the reliable operation of an electrical power system is the development of an appropriate protection and fault management strategy. If an electrical earth fault occurs on a composite more-electric aircraft then the CFRP may form part of the route to ground. In order to develop an appropriate protection system and thus to understand the effects on engine generators it is necessary to investigate the fault response of this network. Hence a suitable electrical model of the CFRP material is required, which will enable CFRP to be included in a computationally-intensive systems-level simulation study of a more-electric aircraft (MEA) with fully switching power electronic converter models.This paper presents an experimentally validated impedance model of CFRP at an appropriate level of fidelity for use in systems level simulation platforms, enabling appropriate protection methods to be developed. The validated model considers the impact of the electrical bonding to ground, including the impedance added by a metallic frame that a CFRP panel may be mounted in. The simplicity of the model results in a less complex process to determine the expected impedance of the CFRP material, enabling a focus on the fault response of the system and subsequent development of appropriate protection solutions.

   Suppression of conducted, high frequency signals in aerospace DC/AC converters designed with SiC MOSFETs
By Danil DROZHZHIN [View]
[Download]

Abstract: This paper presents the impact of voltage fall time of SiC MOSFETs, applied in converters of aerospaceDC fed AC drives, on a HF conducted EMI signals. Simple frequency domain behavioral model isproposed for the use. Simulation results and real system measurements are successfully compared. Itwas shown that appropriate tuning of MOSFET voltage fall time by means of gate driver design allowsto selectively suppress common mode noise in the high frequency range. Associated EMI filter designis showing that such suggestion can be used to compensate negative impact of equivalent parallel capacitanceof the common mode chokes, leading to simplified filter structure. Resulting impact on theswitching energy loss per one commutation cycle is also discussed.

EPE 2016 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 09: Industry-Specific Energy Conversion and Conditioning Technologies > EPE 2016 - LS5e: Industry Specific Energy Conversion and Conditionning Technologies
	[return to parent folder]

	A new Modular Multilevel Converter for Medium Voltage High Power Oil & Gas Motor Drive Applications By Max BEUERMANN	[View] [Download]
Abstract: Especially the Oil & Gas industry is looking for ways to increase the process productivity and energy efficiency. To realize these goals the electrification of the drive train is essential. Therefore variable speed drives (VFD) to control speed and torque of the compressors and pumps are used to reach a higher degree of process optimization.Currently several different topologies of Medium Voltage drives are available on the market. After becoming the predominat technology in self-commutated HVDC transmission systems the Modular Multilevel Converter (M2C) is now also entering the high power Medium Voltage drive market.The paper presents the first commercially available water-cooled Medium Voltage motor drive based on the M2C technology. To ensure that the performance of the whole drive system meets the performance requirements of the Oil & Gas industry, a system test in a back-to-back arrangement has been performed. The motor drive specific features and the HW are described. Measurement results from the back-to-back test of a 12 MW compressor drive are included, e.g. operation at low motor frequencies down to zero speed at high torque and voltage and current waveforms during a cell bypass event.

	Current Sharing inside a High Power IGBT Module at the Negative Temperature Coefficient Operating Region By Panagiotis ASIMAKOPOULOS	[View] [Download]
Abstract: This work investigates the current sharing effect of a high power Soft Punch Through IGBT module in the Negative Temperature Coefficient region. The unbalanced current sharing between two of the substrates is demonstrated for different current and temperature levels and its impact on the thermal stressing of the device is evaluated. The results indicate that the current asymmetry does not lead to a significant thermal stressing unbalance between the substrates.

	Electrical model of carbon fibre reinforced polymers for the development of electrical protection systems for more electric aircraft. By Catherine JONES	[View] [Download]
Abstract: Carbon fibre reinforced polymers (CFRP) are increasingly used for structures on aircraft due to their superior mechanical properties compared to traditional materials, such as aluminium. Additionally, in order to improve aircraft performance, there is a continued trend for electrically driven loads on aircraft, increasing the on-board electrical power generation capacity and complexity of the electrical power system, including a desire to increase voltage levels and move towards DC distribution systems.Central to the reliable operation of an electrical power system is the development of an appropriate protection and fault management strategy. If an electrical earth fault occurs on a composite more-electric aircraft then the CFRP may form part of the route to ground. In order to develop an appropriate protection system and thus to understand the effects on engine generators it is necessary to investigate the fault response of this network. Hence a suitable electrical model of the CFRP material is required, which will enable CFRP to be included in a computationally-intensive systems-level simulation study of a more-electric aircraft (MEA) with fully switching power electronic converter models.This paper presents an experimentally validated impedance model of CFRP at an appropriate level of fidelity for use in systems level simulation platforms, enabling appropriate protection methods to be developed. The validated model considers the impact of the electrical bonding to ground, including the impedance added by a metallic frame that a CFRP panel may be mounted in. The simplicity of the model results in a less complex process to determine the expected impedance of the CFRP material, enabling a focus on the fault response of the system and subsequent development of appropriate protection solutions.

	Suppression of conducted, high frequency signals in aerospace DC/AC converters designed with SiC MOSFETs By Danil DROZHZHIN	[View] [Download]
Abstract: This paper presents the impact of voltage fall time of SiC MOSFETs, applied in converters of aerospaceDC fed AC drives, on a HF conducted EMI signals. Simple frequency domain behavioral model isproposed for the use. Simulation results and real system measurements are successfully compared. Itwas shown that appropriate tuning of MOSFET voltage fall time by means of gate driver design allowsto selectively suppress common mode noise in the high frequency range. Associated EMI filter designis showing that such suggestion can be used to compensate negative impact of equivalent parallel capacitanceof the common mode chokes, leading to simplified filter structure. Resulting impact on theswitching energy loss per one commutation cycle is also discussed.