EPE Association: EPE 2021 - Advanced Measurements and Estimations Methods

EPE 2021 - Advanced Measurements and Estimations Methods
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2021 ECCE Europe - Conference > EPE 2021 - Topic 04: Electrical Machines and Drive Systems > EPE 2021 - Advanced Measurements and Estimations Methods

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   A Robust AC System Frequency Estimation Method based on Cauchy's Residue Theorem
By Pablo BRIFF [View]
[Download]

Abstract: This work presents an innovative frequency estimation algorithm for three-phase ac systems by transforming the time-domain voltages into the complex variable domain and then computing a complex variable line integral. The frequency estimation is obtained by using Cauchy's Residue Theorem, where the closed-loop integral of an analytic complex function vanishes on a closed trajectory. Moreover, the ac phase angle can be derived from the ac estimated frequency. The proposed method outperforms a standard Phase-Locked Loop in terms of its open-loop frequencystep response. Furthermore, the estimated frequency and phase generated by the proposed method has been used to successfully control a VSC-HVDC scheme during steady-state and transient operating conditions in a computer simulation environment. In summary, the proposed method presents an efficient mechanism to generate a robust electrical frequency estimation, extendible to phase estimation, with minimal computational effort.

   A Unified Platform for Junction Temperature Estimation and Condition Monitoring of Power Semiconductor Devices
By Angus BRYANT [View]
[Download]

Abstract: This paper presents a combined method for Junction Temperature Estimation and Condition Monitoring. It calculates a continuous temperature estimate, combined with tracking of electrical and thermal characteristics for Condition Monitoring. Experimental data across a range of mission profiles is used to demonstrate its effectiveness in distinguishing between degradation and a mission profile change, detecting physical changes and abnormal operation, and detecting end-of-life in a degraded device.

   Accounting for Acquisition Circuit Temperature in Accurate Online Junction Temperature Estimation
By Kevin MUÑOZ BARÓN [View]
[Download]

Abstract: Online junction temperature estimation via temperature-sensitive electrical parameters promises an accurate and highly dynamic way to calculate device temperature. In typical setups, only the temperature dependency of the device is considered, however, the necessary acquisition circuits also have a distinct temperature behavior that is usually neglected. In this work, the impact of the temperature of the acquisition circuits in the form of the PCB temperature on an online junction temperature estimation is analyzed. Measurements for the temperature sensitivity in a climate chamber and a standard calibration of the onstate voltage as a temperature-sensitive electrical parameter are combined to improve the accuracy. The proposed method shows an influence of the PCB temperature on the temperature estimation and enables an improvement of 6.8K in the best case. Furthermore, measurements over ambient temperatures ranging from 0 °C to 80 °C show a decreasing influence of the PCB temperature on the temperature estimation for higher temperatures. The proposed method is able to compensate for the error induced in the final junction temperature measurement of the device in operation, especially for the lower temperature range, where the on-state voltage has a distinct lower temperature sensitivity.

   Design guideline for PCB integrated, high bandwidth, current slope sensing based on a planar Rogowski coil
By Johannes STOSS [View]
[Download]

Abstract: This paper shows the design process of a planar Rogowski coil integrated in the Printed-Circuit-Board (PCB) for direct current slope measurement. Focus lies on the analytic estimation of the coil parameters with respect to specific limitations and the analog signal processing for a simplified design process. All analytic derivations are verified by measurements.

EPE 2021 - Advanced Measurements and Estimations Methods
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2021 ECCE Europe - Conference > EPE 2021 - Topic 04: Electrical Machines and Drive Systems > EPE 2021 - Advanced Measurements and Estimations Methods
	[return to parent folder]

	A Robust AC System Frequency Estimation Method based on Cauchy's Residue Theorem By Pablo BRIFF	[View] [Download]
Abstract: This work presents an innovative frequency estimation algorithm for three-phase ac systems by transforming the time-domain voltages into the complex variable domain and then computing a complex variable line integral. The frequency estimation is obtained by using Cauchy's Residue Theorem, where the closed-loop integral of an analytic complex function vanishes on a closed trajectory. Moreover, the ac phase angle can be derived from the ac estimated frequency. The proposed method outperforms a standard Phase-Locked Loop in terms of its open-loop frequencystep response. Furthermore, the estimated frequency and phase generated by the proposed method has been used to successfully control a VSC-HVDC scheme during steady-state and transient operating conditions in a computer simulation environment. In summary, the proposed method presents an efficient mechanism to generate a robust electrical frequency estimation, extendible to phase estimation, with minimal computational effort.

	A Unified Platform for Junction Temperature Estimation and Condition Monitoring of Power Semiconductor Devices By Angus BRYANT	[View] [Download]
Abstract: This paper presents a combined method for Junction Temperature Estimation and Condition Monitoring. It calculates a continuous temperature estimate, combined with tracking of electrical and thermal characteristics for Condition Monitoring. Experimental data across a range of mission profiles is used to demonstrate its effectiveness in distinguishing between degradation and a mission profile change, detecting physical changes and abnormal operation, and detecting end-of-life in a degraded device.

	Accounting for Acquisition Circuit Temperature in Accurate Online Junction Temperature Estimation By Kevin MUÑOZ BARÓN	[View] [Download]
Abstract: Online junction temperature estimation via temperature-sensitive electrical parameters promises an accurate and highly dynamic way to calculate device temperature. In typical setups, only the temperature dependency of the device is considered, however, the necessary acquisition circuits also have a distinct temperature behavior that is usually neglected. In this work, the impact of the temperature of the acquisition circuits in the form of the PCB temperature on an online junction temperature estimation is analyzed. Measurements for the temperature sensitivity in a climate chamber and a standard calibration of the onstate voltage as a temperature-sensitive electrical parameter are combined to improve the accuracy. The proposed method shows an influence of the PCB temperature on the temperature estimation and enables an improvement of 6.8K in the best case. Furthermore, measurements over ambient temperatures ranging from 0 °C to 80 °C show a decreasing influence of the PCB temperature on the temperature estimation for higher temperatures. The proposed method is able to compensate for the error induced in the final junction temperature measurement of the device in operation, especially for the lower temperature range, where the on-state voltage has a distinct lower temperature sensitivity.

	Design guideline for PCB integrated, high bandwidth, current slope sensing based on a planar Rogowski coil By Johannes STOSS	[View] [Download]
Abstract: This paper shows the design process of a planar Rogowski coil integrated in the Printed-Circuit-Board (PCB) for direct current slope measurement. Focus lies on the analytic estimation of the coil parameters with respect to specific limitations and the analog signal processing for a simplified design process. All analytic derivations are verified by measurements.