EPE Association: EPE 2015 - LS1d: PV-Converters

EPE 2015 - LS1d: PV-Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 05: Renewable Energy Power Systems > EPE 2015 - LS1d: PV-Converters

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   1-MW Solar Power Inverter with Boost Converter using all SiC Power Module
By KANSUKE FUJII [View]
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Abstract: Recently, the market of the PV power plant is growing up in the Asian market. In the PV power plant, typically, an inverter which has the rated power of few hundreds kVA is applied to feed the power to the grid. A 1-MW solar power inverter which employs all SiC Power Modules has been developed. The developed solar power inverter consists of two conversion stages, first stage is a boost converter and second stage is a T-type NPC inverter. A chopper module in the boost converter is configured with SiC-based MOSFETs and Schottky Barrier Diodes, and 48 chopper modules are used in parallel. Each chopper module is controlled individually. The T-type NPC inverter stage is configured with Si-based IGBTs and RB-IGBTs.In this paper, the circuit configurations of the developed solar power inverter, employed SiC-based power devices, and the control scheme are described in detail. In the end, the total efficiencies for the minimum, nominal, and maximum DC voltages are experimentally measured. The measured efficiency at the rated output power varies from 98 \% to 98.6 \% depending on the values of DC input voltage. The maximum efficiency of 98.8 \% is achieved in the case of maximum DC input voltage

   Design and implementation of Boost-Zeta Module-Integrated Converter for PV Power Applications
By Mário Lúcio da Silva MARTINS [View]
[Download]

Abstract: The Future Renewable Electric Energy Delivery and Management (FREEDM) Systems Center wasrecognized with the mission to improve the fundamental and permitting technologies essential formodel ever-changing power grid infrastructure, the FREEDM System. Aiming to reduce this systemcosts and improve its reliability and modularity, this paper proposes an improvement in the FREEDMtopology. It consists in the removal of the DC-DC battery charger (DESD) converters and replacesthem by the direct connection of a single battery bank to the DC bus. This way, only DistributedRenewable Energy Resources (DRER) converters are employed with a single battery bank ensuringthat quite a lot of hardware is saved. Nevertheless, to maintain the battery charging regulation, theDRER converters, besides the maximum power point tracking (MPPT), must also to run the batterycharging method and to provide adequate charging conditions to the single back-up system. Toachieve such characteristics a novel single-switch DC/DC converter is presented and analyzed. Thisconverter provides high voltage gain and low output current ripple required for the new DRERfunctionalities, which is responsible for the MPPT of the PV module and also the Constant Current,Constant Voltage (CCCV) charging method of battery pack. Experimental and Simulation results arepresented for the purpose of operating the converter and also the operation of the system.

   Integrated three-phase PV SiC inverter to increase self-consumption with innovative topology, flexible connection options and high efficiency
By Andreas HENSEL [View]
[Download]

Abstract: The self-consumption of PV-systems can be increased with a battery. The proposed three-phase inverter provides three independent DC inputs that can each be connected to a battery or a PV-string. The innovative topology allows energy flow in each direction at a very high efficiency (> 98 \% in each converter stage). The application of SiC transistors leads to a higher switching frequency (48 kHz) compared to commercial systems. The resulting filter elements such as inductors and capacitors are PCB mountable. Thus a highly integrated demonstrator was developed. The system is proposed in detail in this paper.

   Solar Photovoltaic Power Electronic Systems: Design for Reliability Approach
By XIAOFANG SHI [View]
[Download]

Abstract: This paper proposes reliability block diagrams for various photovoltaic (PV) system topologies andevaluates their reliability functions and mean time to failure (MTTF). The paper presents sensitivityanalysis of the system MTTF with respect to individual failure rates of power electronic converters.The proposed approach can be used to determine reliability specifications of required converters interms of desired MTTFs based on a desired PV system MTTF. This creates a reliability feedback loopto refine the PV system topology leading to a 'design for reliability' approach. Results and reliabilitymodels proposed in this paper can be used for further comparing the reliability of different powerelectronic topologies in PV applications, and can extend to a wide range of energy systems utilizingpower electronic converters.

EPE 2015 - LS1d: PV-Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 05: Renewable Energy Power Systems > EPE 2015 - LS1d: PV-Converters
	[return to parent folder]

	1-MW Solar Power Inverter with Boost Converter using all SiC Power Module By KANSUKE FUJII	[View] [Download]
Abstract: Recently, the market of the PV power plant is growing up in the Asian market. In the PV power plant, typically, an inverter which has the rated power of few hundreds kVA is applied to feed the power to the grid. A 1-MW solar power inverter which employs all SiC Power Modules has been developed. The developed solar power inverter consists of two conversion stages, first stage is a boost converter and second stage is a T-type NPC inverter. A chopper module in the boost converter is configured with SiC-based MOSFETs and Schottky Barrier Diodes, and 48 chopper modules are used in parallel. Each chopper module is controlled individually. The T-type NPC inverter stage is configured with Si-based IGBTs and RB-IGBTs.In this paper, the circuit configurations of the developed solar power inverter, employed SiC-based power devices, and the control scheme are described in detail. In the end, the total efficiencies for the minimum, nominal, and maximum DC voltages are experimentally measured. The measured efficiency at the rated output power varies from 98 \% to 98.6 \% depending on the values of DC input voltage. The maximum efficiency of 98.8 \% is achieved in the case of maximum DC input voltage

	Design and implementation of Boost-Zeta Module-Integrated Converter for PV Power Applications By Mário Lúcio da Silva MARTINS	[View] [Download]
Abstract: The Future Renewable Electric Energy Delivery and Management (FREEDM) Systems Center wasrecognized with the mission to improve the fundamental and permitting technologies essential formodel ever-changing power grid infrastructure, the FREEDM System. Aiming to reduce this systemcosts and improve its reliability and modularity, this paper proposes an improvement in the FREEDMtopology. It consists in the removal of the DC-DC battery charger (DESD) converters and replacesthem by the direct connection of a single battery bank to the DC bus. This way, only DistributedRenewable Energy Resources (DRER) converters are employed with a single battery bank ensuringthat quite a lot of hardware is saved. Nevertheless, to maintain the battery charging regulation, theDRER converters, besides the maximum power point tracking (MPPT), must also to run the batterycharging method and to provide adequate charging conditions to the single back-up system. Toachieve such characteristics a novel single-switch DC/DC converter is presented and analyzed. Thisconverter provides high voltage gain and low output current ripple required for the new DRERfunctionalities, which is responsible for the MPPT of the PV module and also the Constant Current,Constant Voltage (CCCV) charging method of battery pack. Experimental and Simulation results arepresented for the purpose of operating the converter and also the operation of the system.

	Integrated three-phase PV SiC inverter to increase self-consumption with innovative topology, flexible connection options and high efficiency By Andreas HENSEL	[View] [Download]
Abstract: The self-consumption of PV-systems can be increased with a battery. The proposed three-phase inverter provides three independent DC inputs that can each be connected to a battery or a PV-string. The innovative topology allows energy flow in each direction at a very high efficiency (> 98 \% in each converter stage). The application of SiC transistors leads to a higher switching frequency (48 kHz) compared to commercial systems. The resulting filter elements such as inductors and capacitors are PCB mountable. Thus a highly integrated demonstrator was developed. The system is proposed in detail in this paper.

	Solar Photovoltaic Power Electronic Systems: Design for Reliability Approach By XIAOFANG SHI	[View] [Download]
Abstract: This paper proposes reliability block diagrams for various photovoltaic (PV) system topologies andevaluates their reliability functions and mean time to failure (MTTF). The paper presents sensitivityanalysis of the system MTTF with respect to individual failure rates of power electronic converters.The proposed approach can be used to determine reliability specifications of required converters interms of desired MTTFs based on a desired PV system MTTF. This creates a reliability feedback loopto refine the PV system topology leading to a 'design for reliability' approach. Results and reliabilitymodels proposed in this paper can be used for further comparing the reliability of different powerelectronic topologies in PV applications, and can extend to a wide range of energy systems utilizingpower electronic converters.