Accurate optical measurement of high voltage waveform using novel optical liquid crystal based sensor

Firth, Josiah; Brodzeli, Zourab; Ciobotaru, Mihai; Phung, B.T.; Ladouceur, François; Silvestri, Leonardo

doi:10.1016/j.sna.2017.11.015

Cited by 13 publications

(8 citation statements)

References 16 publications

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“…After that, the capacitive dividers were subjected to measurements in the constant climate chamber, at which the temperature varied stepwise between -20 °C and +65 °C. The measurement results were mathematically corrected according to (5) and (6) and the constants in Table II. The measurement results are shown in Fig.…”

Section: Thermal Testing Of a Complete Capacitive Dividermentioning

confidence: 99%

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A Development of a Capacitive Voltage Divider for High Voltage Measurement as Part of a Combined Current and Voltage Sensor

Hrbáč

Kolář

Bartłomiejczyk

et al. 2020

ELEKTRON ELEKTROTECH

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This article deals with the development of capacitive voltage divider for high voltage measurements and presents a method of analysis and optimization of its parameters. This divider is a part of a combined voltage and current sensor for measurements in high voltage power networks. The sensor allows continuous monitoring of the network distribution status and performs a quick diagnosis and location of possible network failures. Deployment of these devices will support semi-autonomous control of power networks and it can be considered as a step from traditional power grids toward smart grids. This is a worldwide trend connected with increasing number of renewable energy sources and plug-in electric vehicles as described in. In this way, it contributes to the reliability of the distribution network. Together with automated control techniques and fault location methods, it enables its self-healing capability. The following characteristics required for the sensor include: current measurement error up to 2 %, voltage measurement error up to 0.5 %, and power measurement error up to 5 %. At the same time, it is necessary that the sensor is cost-effective - relatively cheap. There were selected capacitors made in series production for the capacitive divider designing. The capacitive voltage divider was tested in terms of time and temperature stability; the results are described in the paper. Then, the method of mathematical correction of a temperature dependence of the capacitive voltage divider was suggested and tested.

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Section: Thermal Testing Of a Complete Capacitive Dividermentioning

confidence: 99%

“…In addition to many good properties, they also have some seriously bad ones, such as a temperature dependence [5]. Furthermore, high voltage measurement technologies based on liquid crystal sensor were developed [6], but they are still in stage of laboratory development.…”

mentioning

confidence: 99%

A Development of a Capacitive Voltage Divider for High Voltage Measurement as Part of a Combined Current and Voltage Sensor

Hrbáč

Kolář

Bartłomiejczyk

et al. 2020

ELEKTRON ELEKTROTECH

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“…Furthermore, V-shaped electro-optic switching [ 42 , 43 , 44 ] is also a promising effect for fast switching device applications. The polymer-stabilized OAFLC materials possessing a short helical pitch are also particularly appealing due to their potential application in effects based on the deformation of the helical structure [ 45 ]; they have attracted increasing interest, mainly due to their potential applications for flow, pressure, gas and electric smart sensing systems used in many significant fields [ 46 , 47 , 48 , 49 , 50 , 51 ], and therefore, the development of a liquid crystal base mixture is crucial. For all the above-mentioned sensing applications, one of the key points is to develop suitable bi-component OAFLC mixtures to further polymerize them by using suitable monomers and dimers to produce materials with appropriate features.…”

Section: Introductionmentioning

confidence: 99%

Static Permittivity and Electro-Optical Properties of Bi-Component Orthoconic Antiferroelectric Liquid Crystalline Mixtures Targeted for Polymer Stabilized Sensing Systems

Nepal¹,

Das²,

Das

et al. 2022

Polymers

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The behavior of two newly formulated bi-component orthoconic antiferroelectric liquid crystalline (OAFLC) systems, i.e., the Compound A + Compound B mixture system and Compound C + Compound B mixture system has been discussed in light of temperature and concentration dependencies of helical pitch length, spontaneous polarization, relaxation time, bulk viscosity, and the anchoring energy strength coefficient, together with static dielectric permittivity (ε) and dielectric anisotropy. Compound A + Compound B mixtures possess spontaneous polarization between 190–340 nC.cm−2 and fast relaxation times between 190–320 µs in the smectic antiferroelectric SmCA* phase at room temperature. Compound C + Compound B mixtures also have a spontaneous polarization in the range of 190–280 nC.cm−2 and relaxation times in the range of 190–230 µs at room temperature. Most of the mixtures have a helical pitch below one micrometer in the SmCA* phase. These advanced mixtures show a broad temperature range of the antiferroelectric SmCA* phase, fast switching of molecules under an applied electric field, negative dielectric anisotropy and a short helical pitch, confirming the advantage of designing new polymer-stabilized OAFLC that is targeted for novel application in sensing devices, utilizing the fast responsive electro-optical modulation elements.

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“…A recently published article by Yong Cui et al [8] introduced a sensor based on the Pockels effect that may detect the distorted E-field better than the Narda-NBM-550 sensor. J. Firth et al [9] developed a new optical liquid crystal E-field sensor, which can improve the measurement accuracy to 1% even though the strong E-field reaches 380 kV/m. Optical crystal sensors are used in a variety of materials and structures, and have good output response characteristics [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Test of a Contactless Voltage Measurement Method for Overhead Lines Based on Reconstruction of Integral Node Parameters

Wang

Yan

et al. 2019

Sensors

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To improve the stability and adaptability of the voltage measurement based on the E-field (electric field) integral method, in this paper we introduce a new method for the contactless voltage measurement of the overhead lines. The method adopts the node parameter reconstruction technology, which is based on the Gauss–Chebyshev algorithm. In order to achieve high-quality E-field detection at the reconstructed node position, we designed a novel D-dot sensor with parallel distributed electrodes. A Maxwell simulation model of multi-level voltages of the overhead lines was carried out to determine a comprehensive criterion of the reconstruction factors. The simulation employed a three-phase overhead line experiment platform to calculate and measure the distribution and the changing trend of the E-field. The deviations of the voltage measurement were reduced at a significantly low level within 0.4%. The result of the simulation demonstrates that the method optimizes sensor distribution by reconstructing node parameters, which enables the system to have high accuracy and reliability on the contactless voltage measurement of the overhead lines.

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Accurate optical measurement of high voltage waveform using novel optical liquid crystal based sensor

Cited by 13 publications

References 16 publications

A Development of a Capacitive Voltage Divider for High Voltage Measurement as Part of a Combined Current and Voltage Sensor

A Development of a Capacitive Voltage Divider for High Voltage Measurement as Part of a Combined Current and Voltage Sensor

Static Permittivity and Electro-Optical Properties of Bi-Component Orthoconic Antiferroelectric Liquid Crystalline Mixtures Targeted for Polymer Stabilized Sensing Systems

Simulation and Test of a Contactless Voltage Measurement Method for Overhead Lines Based on Reconstruction of Integral Node Parameters

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