<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Zero-crossing detection (ZCD) circuits are widely utilized to synchronize power electronics converters with the grid and measure frequency and phase angle. They are usually designed using an operational amplifier (op-amp) or a voltage sensor accompanied by a processing device. The performance profile of these circuits alters depending on many factors, including the input voltage level. An experimental comparison between the two ZCD circuits across various input voltage levels does not appear to be presented in the literature. This work experimentally compares the performance of an op-amp and an isolated voltage sensor-based ZCD circuits, considering their rise/fall latency and precision in detecting the zero-crossing points (ZCPs). The design process and the experimental results demonstrated that the op-amp-based ZCD circuit is susceptible to false and multiple detections of ZCPs and is best suited for relatively low-voltage applications. On the other hand, the voltage sensor-based ZCD circuit allows signal conditioning and is best suited for relatively high voltage applications.</p>
</abstract>

Zero-crossing detection (ZCD) circuits are widely utilized to synchronize power electronics converters with the grid and measure frequency and phase angle. They are usually designed using an operational amplifier (op-amp) or a voltage sensor accompanied by a processing device. The performance profile of these circuits alters depending on many factors, including the input voltage level. An experimental comparison between the two ZCD circuits across various input voltage levels does not appear to be presented in the literature. This work experimentally compares the performance of an op-amp and an isolated voltage sensor-based ZCD circuits, considering their rise/fall latency and precision in detecting the zero-crossing points (ZCPs). The design process and the experimental results demonstrated that the op-amp-based ZCD circuit is susceptible to false and multiple detections of ZCPs and is best suited for relatively low-voltage applications. On the other hand, the voltage sensor-based ZCD circuit allows signal conditioning and is best suited for relatively high voltage applications.

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Department of Electrical and Electronics Engineering

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Zero-crossing detection (ZCD) circuits are widely utilized to synchronize power electronics converters with the grid and measure frequency and phase angle....

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Published Online: Dec 14, 2023

Page range: 485 - 491

Received: Oct 02, 2023

DOI: https://doi.org/10.2478/jee-2023-0056

Keywords
AC-AC conversion, grid synchronization, grid-connected converter, operational amplifier (op-amp), phase detection, voltage sensor, zero-crossing detection (ZCD)

© 2023 Osamah Al-Dori et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Experimental comparison of operational amplifier and voltage sensor-based zero-crossing detector circuits for power electronic converters

Published Online: Dec 14, 2023

Page range: 485 - 491

Received: Oct 02, 2023

DOI: https://doi.org/10.2478/jee-2023-0056

KeywordsAC-AC conversion, grid synchronization, grid-connected converter, operational amplifier (op-amp), phase detection, voltage sensor, zero-crossing detection (ZCD)

© 2023 Osamah Al-Dori et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
AC-AC conversion, grid synchronization, grid-connected converter, operational amplifier (op-amp), phase detection, voltage sensor, zero-crossing detection (ZCD)