Non-Contact Measurement of Line Voltage

Lawrence, David M.; Donnal, John; Leeb, Steven B.; He, Yiou

doi:10.1109/jsen.2016.2619666

Cited by 47 publications

(10 citation statements)

References 8 publications

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“…However, these target high voltage AC measurement using capacitive technology, wherein the coupling capacitance formed between the current carrying conductor and the cable insulation is measured. This capacitance is mapped to the voltage on the conductor [23][24][25][26]. TDK released a surface potential sensor to measure high voltage DC (0 -1000 V) without any contact.…”

Section: Related Workmentioning

confidence: 99%

Sos

Narayana

Prasad

Prabhakar

2021

Proceedings of the 19th Annual International Conference on Mobile Systems, Applications, and Services

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With the advent of Space-IoTs, the rate of launch of satellites has grown significantly. Alongside, the failure rate of satellites has also surged increased tremendously. Satellites are non-repairable systems in orbit, and the financial loss incurred when the satellites fail before their expected mission time is substantial. If the source of a failure is known while the satellite is in orbit, then there is a possibility to revive it by sending appropriate commands from ground stations. In this work, we present a simple, independent satellite health monitoring system called Chirper. The Chirper is equipped with multiple modules such as IMU, isolated voltage and current measurement probes, and an onboard communication channel. We present a new approach to measure low DC voltages in an isolated way, providing a resolution and accuracy of around 1 V. We evaluated the design and performance of the Chirper through simulation, testing it in space systems test facility, and by mounting it on a helium balloon. With extensive experiments we show that 90% of the time the dc voltage measurement error is within 0.8 V, and the maximum error is 0.9 V. We expect to launch the Chirper soon on a space system. CCS CONCEPTS• Computer systems organization → Embedded hardware; • Hardware → Sensors and actuators; Wireless devices.

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Section: Related Workmentioning

confidence: 99%

Sos

Narayana

Prasad

Prabhakar

2021

Proceedings of the 19th Annual International Conference on Mobile Systems, Applications, and Services

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“…Several teams have studied probes and calibration techniques for non-contact voltage measurement. A differential pickup capacitive probe has been designed on a four-layer printed board [17], which can reduce the influence of peripheral coupled electric fields. The voltage reconstruction process is to calculate the voltage value of the measured wire through the output voltage of the sensor and the pre-designed capacitance.…”

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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“…In the traditional way of measuring voltage, direct contact with the metal conductor in cables is required, which is difficult and unsafe. Thus, researchers have been developing non-invasive methods of measuring voltage, (2,3) which estimate the cable voltage using harvested electric field energy. Non-invasive sensors offer ease of installation and avoid contact with dangerous hot wires.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective Optimization of Non-invasive Voltage Sensor Considering Sensitivity, Array Arrangement, and Cost

Qian¹,

Wang²,

Zhang³

2022

Sensors and Materials

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Non-invasive sensors are designed to offer ease of installation and avoid contact with dangerous hot wires. To optimize the array design of sensors, a multi-objective optimization method considering sensitivity, array arrangement, and cost is proposed in this study. The total array induced charge Q and the location sensitivity S 1 are established to evaluate the sensor performance. On the basis of these evaluation indexes, design criteria for the array arrangement are proposed, which include the electrode shape, the array profile, and the space interval angle between electrode elements. Following this design basis, two objective functions for the array design are investigated. The first objective function is based on the entropy-CRITIC weight of the two regression models and the second objective function is based on the manufacturing cost. For the multi-objective design, the NAGA-Ⅱ algorithm is employed and the VIKOR strategy is used to select the decision from the Pareto set. Optimization results show that, compared with the original design, the value of the first objective function is improved by 74.35% and the value of the second objective function is reduced by 22.99%. It is found that the rectangular shape is suitable for the single-electrode element design. The sensing array is best designed in a ring profile, and the optimal number of electrodes is 3.

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Non-Contact Measurement of Line Voltage

Cited by 47 publications

References 8 publications

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

Multi-objective Optimization of Non-invasive Voltage Sensor Considering Sensitivity, Array Arrangement, and Cost

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