An earth-isolated optically coupled wideband high voltage probe powered by ambient light

Zhai, Xiang; Bellan, Paul M.

doi:10.1063/1.4757112

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…In the classification of analogue isolated high-voltage probes, two types can be distinguished according to the location of the isolation: those using a non-intrusive sensor/measuring coupling system [1,2] and those using an intrusive one [3,4], that connect a circuit to the system and then use a coupling method, either optical, capacitive, inductive, or through the power supply, to achieve the isolation. In [1], the authors present a nonintrusive probe for the non-contact measurement of voltages of 10 kV and a bandwidth of 4.5 MHz, based on the electric field coupling principle using the dual-pin-type probe method.…”

Section: Introductionmentioning

confidence: 99%

“…Other proposals develop solutions based on optical isolation, achieving measurement ranges down to 2 kV with bandwidths from DC to 5 MHz [3], aiming at detecting fast voltage changes. These types of probes require a LED driver and a photodetector as a receiver, which transforms the input voltage into a light signal and the information in the form of lux, back to a voltage value.…”

Section: Introductionmentioning

confidence: 99%

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Remote Low-Cost Differential Isolated Probe for Voltage Measurements

Antolín-Cañada,

Perez-Cebolla,

Eneriz

et al. 2024

Applied Sciences

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The growing development of communication technologies has given rise to the Internet of Things, which has led to the emergence of new cities, smart grids, and smart buildings, and the development of energy generation using renewable sources, as well as the emergence of new electrical loads such as the electric car. These advances give rise to the need for new media devices with remote communication, and require a greater control and monitoring of the state of the electrical grid in order to verify its correct state, as well as the detection of faults or alterations that are occurring in it due to these new generation systems or new loads. These remote, unsupervised measurement devices require galvanic isolation to protect the measurement and communication system, so that even if there is a break in the isolation, the integrity of the measurement and communication system is maintained. In addition, as it is a device prepared for multipoint measurement, the cost of the probe must be contained. This article details the design, implementation, and validation of a low-cost remote isolated differential voltage probe. This probe is intended for monitoring at network supply points, as well as for the verification of the European standard EN 50160 as a means of detecting disturbances in network behaviour. Its characteristics as a differential and isolated probe provide it with the possibility of floating voltage averaging, guaranteeing the integrity of the electronics of the low-voltage probe, i.e., the digitalisation and communication system. The measurements collected are sent via an MQTT protocol, which makes the remote probe a device compatible with the Internet of Energy. For the validation of the probe, a full functional test is performed, including FFT spectral analysis to verify the compliance of the mains voltage with the aforementioned European standard EN 50160.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Remote Low-Cost Differential Isolated Probe for Voltage Measurements

Antolín-Cañada,

Perez-Cebolla,

Eneriz

et al. 2024

Applied Sciences

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Modular high-voltage bias generator powered by dual-looped self-adaptive wireless power transmission

Xie

Huang

et al. 2015

Review of Scientific Instruments

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We proposed a modular high-voltage (HV) bias generator powered by a novel transmitter-sharing inductive coupled wireless power transmission technology, aimed to extend the generator's flexibility and configurability. To solve the problems caused through an uncertain number of modules, a dual-looped self-adaptive control method is proposed that is capable of tracking resonance frequency while maintaining a relatively stable induction voltage for each HV module. The method combines a phase-locked loop and a current feedback loop, which ensures an accurate resonance state and a relatively constant boost ratio for each module, simplifying the architecture of the boost stage and improving the total efficiency. The prototype was built and tested. The input voltage drop of each module is less than 14% if the module number varies from 3 to 10; resonance tracking is completed within 60 ms. The efficiency of the coupling structure reaches up to 95%, whereas the total efficiency approaches 73% for a rated output. Furthermore, this technology can be used in various multi-load wireless power supply applications.

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