A Sensor Topology for Noncontact AC Voltage Measurement of Polyphase Cables

Krause, Thomas C.; Camenzind, Katherine; Green, Daisy H.; Moeller, Andrew; Huchel, Lukasz; Leeb, Steven B.

doi:10.1109/tim.2021.3128709

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…There is a problem of deviation between the pre-designed capacitance value and the actual measurement conditions. The team later applied the sensor probe to the voltage measurement of multiphase system and proposed a calibration algorithm for multiphase cables [18]. However, it still needs to be calibrated using known reference excitation.…”

Section: Introductionmentioning

confidence: 99%

Non-contact voltage measurement of residential cables based on internal parameter conversion and centering probe assistance

Huang,

Zhang,

Suo

2023

Meas. Sci. Technol.

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Existing non-contact voltage measurement technology cannot be applied to residential cables containing neutral wire and earth wire in addition to live wire. A non-contact voltage measurement method of residential cables is introduced in this article. First, an equivalent circuit model of the residential cable measurement based on capacitive coupling is established. In order to solve the problem of uncertain coupling capacitance, which leading to the inability to accurately obtain the voltage amplitude, a calibration method based on internal parameter conversion and centering probe assistance is proposed. This method calibrates the cable voltage through different transfer relationships and sensor outputs, and no known reference excitation is required during calibration. Subsequently, the impact of internal parameters on measurement accuracy are analyzed and selection principles are provided. Through finite element simulation, the influence of metal spring for centering on voltage measurement is analyzed, and the measurement error of non-ideal cables (with eccentricity or ovality) is quantified. A prototype probe and internal parameter conversion circuit have been developed, and parasitic capacitance compensation have been completed. The measurement accuracy of 50-Hz voltage in a certain range (100V-300V) was tested in the laboratory, the maximum relative error of amplitude is –0.89%, and the relative error of phase is 0.68%. Four specifications of residential cables testing were completed, with a maximum relative error of –1.35%. Long- term testing was conducted on the actual field (output voltage of the distribution box), the test results showed that the output was linear, and the relative error were kept around 0.65% after primary calibration.

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Section: Introductionmentioning

confidence: 99%

Non-contact voltage measurement of residential cables based on internal parameter conversion and centering probe assistance

Huang,

Zhang,

Suo

2023

Meas. Sci. Technol.

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“…AC resistance voltage dividers are widely used for various levels of voltage measurement [ 1 , 2 , 3 , 4 , 5 , 6 ], and because the frequency characteristics of resistance voltage divider ratios are easier to achieve than those of electromagnetic transformers and other voltage divider test methods [ 7 , 8 , 9 , 10 , 11 , 12 ], precision AC resistance voltage dividers are often used under audio or power harmonic measurement conditions to divide higher voltages into lower voltages for measurement, and corresponding national standards have been introduced [ 13 , 14 , 15 , 16 ]. However, due to the growing demand for harmonic power measurements, precision resistive voltage dividers require tight control of phase shifts and reduced measurement errors [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…In the literature [ 9 ], the influence of pulsation components and spurious parameters on the measurement error of a shielded resistance voltage divider was analyzed, and the error variation curve with the divider parameters was obtained by simulations to reduce the error with the proposed measures. In [ 10 , 11 ], a power thermoelectric comparator and a zero-power factor standard source were used to achieve accurate measurement of the phase error of a resistive voltage divider, and a step-climbing method was proposed to achieve accurate measurement of the phase error of the divider based on the micro potentiometer resistance as a reference standard [ 12 ]. The literature [ 14 ] used digital sampling combined with the step-climbing method to achieve an accurate measurement of the phase error of a resistive voltage divider.…”

Section: Introductionmentioning

confidence: 99%

Calibration Method of a Wideband AC Resistance Voltage Divider Based on an Equivalent Model

He²,

Wang

et al. 2023

Sensors

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Aiming at the problem of large measurement error and phase shift in resistance voltage dividers under high-frequency conditions in the field of power measurement, such as power harmonics, an error correction method is proposed for an alternating current (AC) resistance voltage divider based on the equivalence principle. Firstly, the frequency error model of the AC resistance voltage divider precision is established, and the angle difference of the continuous spectrum ratio difference from 50 Hz to 100 kHz is corrected by determining the shielding structure and the resistance parameters and fine-tuning the shielding potential correction method to reduce the capacities error of the AC resistance voltage divider design precision. At the same time, the performance parameters such as the direction and magnitude of the shielding potential compensation capacitive error are investigated. Finally, the precision voltage divider (the maximum voltage applied is 480 V) calibration experiments verify that the important characteristic judgment factor of the voltage divider is independent of the frequency and the equivalent capacitance value, which effectively solves the phase correction problem of harmonic power measurement.

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Research on Synchronous Measurement Methods Based on Non-Contact Sensing

Wang,

Liu

2024

2024 IEEE 2nd International Conference on Power Science and Technology (ICPST)

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A Sensor Topology for Noncontact AC Voltage Measurement of Polyphase Cables

Cited by 5 publications

References 21 publications

Non-contact voltage measurement of residential cables based on internal parameter conversion and centering probe assistance

Non-contact voltage measurement of residential cables based on internal parameter conversion and centering probe assistance

Calibration Method of a Wideband AC Resistance Voltage Divider Based on an Equivalent Model

Research on Synchronous Measurement Methods Based on Non-Contact Sensing

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