A new hybrid current sensor for high-voltage applications

Bull, Jeffrey S.; Jaeger, Nicolas A. F.; Rahmatian, F.

doi:10.1109/pes.2004.1372973

Cited by 9 publications

(8 citation statements)

References 15 publications

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“…Performance of any digital filter can be reliably evaluated only in case of input impacts approximating, by their kind, actual secondary current waveforms of primary instrument current converters (mostly represented by current transformers or other converters [3], [14]- [18]) the protection using the evaluated filter is connected to. For these purposes, a power system and MP-based (digital) protection current measuring element structural model was developed and reproduced in MicroCAP dynamic modeling environment.…”

Section:   mentioning

confidence: 99%

Selection of Digital Filter for Microprocessor Protection Relays

Solovev¹

2018

IJECE

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The article considers some issues related to replacement of electromechanical relays used for protection of power facilities with microprocessor relays. One of the urgent problems connected with implementation of microprocessor overcurrent protections is how to use current transducers other than usual current transformers and in particular Rogowski coils that become more and more widespread. In the article are compared twelve methods of synthesis of a digital filter basing on the analog prototype -second-order integrating filter. The bilinear filter and Boxer-Thaler filters are analyzed in respect to their use in microprocessor relays. Basing on the research results a technique for selection of parameters of digital integrating filters for microprocessor relays is proposed. Simulation results show that Boxer-Thaler and bilinear filters have better accuracy during transient current measurements than the analog filter. The study allows concluding that in many cases the digital second-order bilinear filter is the best choice for use in microprocessor relays.

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Section:   mentioning

confidence: 99%

Selection of Digital Filter for Microprocessor Protection Relays

Solovev¹

2018

IJECE

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“…However, the buffer layer deteriorates the frequency response [66] and the stability [67]. The mono-shielding electrode was optimized as a grid type, shown in Figure 10 [68].…”

Section: The Integrated Optical E-field Sensormentioning

confidence: 99%

“…A buffer layer (Si or SiO 2 ) should be added between the waveguide and electrode to eliminate the influence of the metal on the waveguide. However, the buffer layer deteriorates the frequency response [ 66 ] and the stability [ 67 ]. The mono-shielding electrode was optimized as a grid type, shown in Figure 10 [ 68 ].…”

Section: The Integrated Optical E-field Sensormentioning

confidence: 99%

Development and Application of Integrated Optical Sensors for Intense E-Field Measurement

Zeng

Wang

Niu

et al. 2012

Sensors

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The measurement of intense E-fields is a fundamental need in various research areas. Integrated optical E-field sensors (IOESs) have important advantages and are potentially suitable for intense E-field detection. This paper comprehensively reviews the development and applications of several types of IOESs over the last 30 years, including the Mach-Zehnder interferometer (MZI), coupler interferometer (CI) and common path interferometer (CPI). The features of the different types of IOESs are compared, showing that the MZI has higher sensitivity, the CI has a controllable optical bias, and the CPI has better temperature stability. More specifically, the improvement work of applying IOESs to intense E-field measurement is illustrated. Finally, typical uses of IOESs in the measurement of intense E-fields are demonstrated, including application areas such as E-fields with different frequency ranges in high-voltage engineering, simulated nuclear electromagnetic pulse in high-power electromagnetic pulses, and ion-accelerating field in high-energy physics.

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“…In recent years, the research on HOCT has been focused on simplifying the structure in the HV environment with reduced power consumption. In [15], a passive integrated-optic Pockels cell (IOPC) was used to modulate the light corresponding to the signals from the Rogowski coil. However, since IOPC is susceptible to the polarization state of the light, a polarizing (PZ) fiber and a polarization maintaining (PM) fiber are needed for the input and output of the sensor head, respectively, which are potentially vulnerable to external pressure and vibration.…”

Section: Introductionmentioning

confidence: 99%

A High-Performance Hybrid Current Transformer Based on a Fast Variable Optical Attenuator

Cheng

Wang

et al. 2014

IEEE Trans. Power Delivery

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We present a novel hybrid electro-optic current transformer based on a fast variable optical attenuator (FVOA) with the features of ultra-low power consumption and polarization insensitivity. An optic-electro feedback loop with a PID control algorithm is designed to compensate the nonlinearity of the FVOA. In addition, the impacts of the power drift of the optical source and variance of fiber loss have been investigated and eliminated. The transformer is built with a verified power consumption of 0.85 mW. Experiments were made in which the linearity, the robustness, the accuracy and the temperature stability of the transformer were tested. The results show that the ratio errors and the phase errors are below 0.07% and 5 min, respectively, when the primary current increased from 25 to 600 A. In addition, the maximum error drifts of 0.17% and 2.8 min were recorded over the 20 to 80 C range.

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A new hybrid current sensor for high-voltage applications

Cited by 9 publications

References 15 publications

Selection of Digital Filter for Microprocessor Protection Relays

Selection of Digital Filter for Microprocessor Protection Relays

Development and Application of Integrated Optical Sensors for Intense E-Field Measurement

A High-Performance Hybrid Current Transformer Based on a Fast Variable Optical Attenuator

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