Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform
Different methods for galvanically isolated monitoring of the mains voltage waveform were evaluated. The aim was to determine the level of distortion of the output signal relative to the input signal and the suitability of each method for calculating active power values. Six fixtures were tested: tw...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/22/20/7769 |
| _version_ | 1797469992112881664 |
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| author | Matouš Havrlík Martin Libra Vladislav Poulek Pavel Kouřím |
| author_facet | Matouš Havrlík Martin Libra Vladislav Poulek Pavel Kouřím |
| author_sort | Matouš Havrlík |
| collection | DOAJ |
| description | Different methods for galvanically isolated monitoring of the mains voltage waveform were evaluated. The aim was to determine the level of distortion of the output signal relative to the input signal and the suitability of each method for calculating active power values. Six fixtures were tested: two voltage transformers, an electronic circuit with a current transformer, a standalone current transformer, a simple circuit with optocouplers, and a circuit with an A/D-D/A converter with capacitive coupling. The input and output waveforms were mathematically analyzed by three methods: (1) calculating the spectral components of waveforms and the relative changes in their THD (total harmonic distortion) values, (2) determining the similarity of waveforms according to the size of the area bounded by the input and output waveform curves, and (3) determining the accuracy of the active power calculation based on the output waveform. The time difference in the zero crossing of the input and output signals was measured, and further calculations for the second and third method were performed on the zero-crossing time shift-corrected waveforms. Other aspects of selecting the appropriate type of monitoring element, such as power consumption or overall circuit complexity, were also evaluated. |
| first_indexed | 2024-03-09T19:30:31Z |
| format | Article |
| id | doaj.art-2f23306c861242d9b68d0e7fc34b4109 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T19:30:31Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj.art-2f23306c861242d9b68d0e7fc34b41092023-11-24T02:25:31ZengMDPI AGSensors1424-82202022-10-012220776910.3390/s22207769Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage WaveformMatouš Havrlík0Martin Libra1Vladislav Poulek2Pavel Kouřím3Department of Physics, Faculty of Engineering, Czech University of Life Sciences Prague, 165 00 Prague, Czech RepublicDepartment of Physics, Faculty of Engineering, Czech University of Life Sciences Prague, 165 00 Prague, Czech RepublicDepartment of Physics, Faculty of Engineering, Czech University of Life Sciences Prague, 165 00 Prague, Czech RepublicDepartment of Physics, Faculty of Engineering, Czech University of Life Sciences Prague, 165 00 Prague, Czech RepublicDifferent methods for galvanically isolated monitoring of the mains voltage waveform were evaluated. The aim was to determine the level of distortion of the output signal relative to the input signal and the suitability of each method for calculating active power values. Six fixtures were tested: two voltage transformers, an electronic circuit with a current transformer, a standalone current transformer, a simple circuit with optocouplers, and a circuit with an A/D-D/A converter with capacitive coupling. The input and output waveforms were mathematically analyzed by three methods: (1) calculating the spectral components of waveforms and the relative changes in their THD (total harmonic distortion) values, (2) determining the similarity of waveforms according to the size of the area bounded by the input and output waveform curves, and (3) determining the accuracy of the active power calculation based on the output waveform. The time difference in the zero crossing of the input and output signals was measured, and further calculations for the second and third method were performed on the zero-crossing time shift-corrected waveforms. Other aspects of selecting the appropriate type of monitoring element, such as power consumption or overall circuit complexity, were also evaluated.https://www.mdpi.com/1424-8220/22/20/7769line voltagetotal harmonic distortionTHDgalvanic separation |
| spellingShingle | Matouš Havrlík Martin Libra Vladislav Poulek Pavel Kouřím Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform Sensors line voltage total harmonic distortion THD galvanic separation |
| title | Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform |
| title_full | Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform |
| title_fullStr | Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform |
| title_full_unstemmed | Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform |
| title_short | Analysis of Output Signal Distortion of Galvanic Isolation Circuits for Monitoring the Mains Voltage Waveform |
| title_sort | analysis of output signal distortion of galvanic isolation circuits for monitoring the mains voltage waveform |
| topic | line voltage total harmonic distortion THD galvanic separation |
| url | https://www.mdpi.com/1424-8220/22/20/7769 |
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