EPE Association: EPE 2023 - LS7c: Measurement & Control

EPE 2023 - LS7c: Measurement & Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 04: Electrical Machines and Drive Systems > EPE 2023 - LS7c: Measurement & Control

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   Impact of Power Factors on Reliability of NPC Inverter-Based PV Systems
By Meng CHEN, Ariya SANGWONGWANICH, Dao ZHOU, Frede BLAABJERG [View]
[Download]

Abstract: The increasing penetration leads to the requirementof reactive power and voltage support provided by the renewableenergy, such as PV. As a result, the reliability of the PV systemsmay be highly influenced. This paper studies the impact ofpower factors on reliability of NPC inverter-based PV systems,where a 225 kW system with commercial components and actual mission profile is used as the demonstration. Firstly, the lifetime estimation of the fragile components, i.e., the IGBTs and the DCAl electrolytic capacitors, are performed. Thereafter, a Monte Carlo analysis is used to evaluate the reliability of the system. The results prove the significant impacts of the power factor onreliability of the NPC inverter-based PV systems.

   Improved performance of Kalman filter for junction temperature estimation with Autocovariance Least-Squares method
By Diego VELAZCO, Maxime VALLE, François WALLART, Guy CLERC, Emmanuel BOUTLEUX [View]
[Download]

Abstract: Junction temperature estimation is a crucial topic for assessing the state-of-health of semiconductors. In this work a measurement board provides an initial estimation of the temperature. Afterwards, a Kalman filter improves this estimation. The ALS method is used for obtaining an optimal performance of the Kalman filter. Finally, the proposed methodology is deployed in an experimental setup and the temperature estimation is validated with the help of a real measurement through fiber optics sensors.

   Series/Parallel Connection Method of DC-DC Transformer for Scalable Power Converter Systems using USPMs
By Takumi IWAMOTO, Koki YAMANOKUCHI, Hiroki WATANABE, Jun-Ichi ITOH [View]
[Download]

Abstract: This paper proposes a series or parallel connection method of a DC-DC transformer(DCX) to achieve power scalability. Universal Smart Power Module (USPM) modularizes allpower converter components. The power converter is realized by combining several USPMs to simplify the power electronics design. A USPM with galvanic isolation (isolated USPM)operates as a DCX. Isolated USPM must have high efficiency over a wide power range. In addition, the voltage or current must be balanced when connected in series or parallel. A dualactive- bridge converter is chosen as the main circuit for the isolated USPM for these requirements. The proposed method is demonstrated by an experimental setup. As a result, the current balance is improved by 75.0pt. in parallel connection, and the voltage balance is improved by 37.0pt. in series connection.

EPE 2023 - LS7c: Measurement & Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 04: Electrical Machines and Drive Systems > EPE 2023 - LS7c: Measurement & Control
	[return to parent folder]

	Impact of Power Factors on Reliability of NPC Inverter-Based PV Systems By Meng CHEN, Ariya SANGWONGWANICH, Dao ZHOU, Frede BLAABJERG	[View] [Download]
Abstract: The increasing penetration leads to the requirementof reactive power and voltage support provided by the renewableenergy, such as PV. As a result, the reliability of the PV systemsmay be highly influenced. This paper studies the impact ofpower factors on reliability of NPC inverter-based PV systems,where a 225 kW system with commercial components and actual mission profile is used as the demonstration. Firstly, the lifetime estimation of the fragile components, i.e., the IGBTs and the DCAl electrolytic capacitors, are performed. Thereafter, a Monte Carlo analysis is used to evaluate the reliability of the system. The results prove the significant impacts of the power factor onreliability of the NPC inverter-based PV systems.

	Improved performance of Kalman filter for junction temperature estimation with Autocovariance Least-Squares method By Diego VELAZCO, Maxime VALLE, François WALLART, Guy CLERC, Emmanuel BOUTLEUX	[View] [Download]
Abstract: Junction temperature estimation is a crucial topic for assessing the state-of-health of semiconductors. In this work a measurement board provides an initial estimation of the temperature. Afterwards, a Kalman filter improves this estimation. The ALS method is used for obtaining an optimal performance of the Kalman filter. Finally, the proposed methodology is deployed in an experimental setup and the temperature estimation is validated with the help of a real measurement through fiber optics sensors.

	Series/Parallel Connection Method of DC-DC Transformer for Scalable Power Converter Systems using USPMs By Takumi IWAMOTO, Koki YAMANOKUCHI, Hiroki WATANABE, Jun-Ichi ITOH	[View] [Download]
Abstract: This paper proposes a series or parallel connection method of a DC-DC transformer(DCX) to achieve power scalability. Universal Smart Power Module (USPM) modularizes allpower converter components. The power converter is realized by combining several USPMs to simplify the power electronics design. A USPM with galvanic isolation (isolated USPM)operates as a DCX. Isolated USPM must have high efficiency over a wide power range. In addition, the voltage or current must be balanced when connected in series or parallel. A dualactive- bridge converter is chosen as the main circuit for the isolated USPM for these requirements. The proposed method is demonstrated by an experimental setup. As a result, the current balance is improved by 75.0pt. in parallel connection, and the voltage balance is improved by 37.0pt. in series connection.