Research and Design of Rotary Optical Electric Field Sensor

Li, Jun; Wang, Hangchao; Li, Yansong

doi:10.1088/1757-899x/677/5/052112

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…According to [111], understanding the kind and density of charge carriers is critical for measurements that are affected by them. To reduce the effects of surface charge carriers, researchers suggested rotating the optical crystal in the field during DC measurements [149,[159][160][161][162]. However, this symmetrical charging of the transducer remains effective only when the ion current is uniformly distributed which is not the case under an outdoor power transmission line.…”

Section: Calibration Under the Influence Of Space Chargementioning

confidence: 99%

Review on sensors for electric fields near power transmission systems

Hortschitz,

Kainz,

Beigelbeck

et al. 2024

Meas. Sci. Technol.

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Due to the necessary transition to renewable energy, the transport of electricity over long distances will become increasingly important, since the sites of sustainable electricity generation, such as wind or solar power parks, and the place of consumption can be very far apart. Currently, electricity is mainly transported via overhead AC lines. However, studies have shown that for long distances, transport via DC offers decisive advantages. To make optimal use of the existing route infrastructure, simultaneous AC and DC, or hybrid transmission, should be employed. The resulting electric field strengths must not exceed legally prescribed thresholds to avoid potentially harmful effects on humans and the environment. However, accurate quantification of the resulting electric fields is a major challenge in this context, as they can be easily distorted (e.g., by the measurement equipment itself). Nonetheless knowledge of the undisturbed field strengths from DC up to several multiples of the fundamental frequency of the power-grid (up to 1\,kHz) is required to ensure compliance with the thresholds. Both AC and DC electric fields can result in the generation of corona ions in the vicinity of the line. In the case of pure AC fields, the corona ions generated typically recombine in the immediate vicinity of the line and, therefore, have no influence on the field measurement further away. Unfortunately, this assumption does not hold for DC fields and hybrid fields, where corona ions can be transported far away from the line (e.g., by wind), and potentially interact with the measurement equipment yielding incorrect measurement results. This review will provide a comprehensive overview of the current state-of-the-art technologies and methods which have been developed to address the problems of measuring the electric field near hybrid power lines.

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Section: Calibration Under the Influence Of Space Chargementioning

confidence: 99%

Review on sensors for electric fields near power transmission systems

Hortschitz,

Kainz,

Beigelbeck

et al. 2024

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…This phenomenon changes the crystal's properties and its response to external electric fields, affecting the accuracy of the measurement. Previous applications limited the use of EO crystals to measurements above 20 Hz [13], unless the effect of space charge was analytically compensated [14] or avoided using a rotary stage [15].…”

Section: Introductionmentioning

confidence: 99%

Electro-Optic Sensor for Measuring Electrostatic Fields in the Frequency Domain

2022

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Precise measurements of electrostatic fields in harsh environments are required in fields ranging from particle accelerators to industrial installations. Many techniques disrupt the field distribution due to the presence of conductors. We present a fully dielectric sensor for very harsh environmental conditions, that exploits the Pockels effect manifested by electro-optic crystals. This system is designed to allow DC measurements to be performed in the frequency domain. The paper discusses an analytical model and simulations of the system, validated with experimental results. The working principle of the measurement technique is explained in detail along the known limitations and possible solutions to further increase the performance.

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Research and Design of Rotary Optical Electric Field Sensor

Cited by 2 publications

References 13 publications

Review on sensors for electric fields near power transmission systems

Review on sensors for electric fields near power transmission systems

Electro-Optic Sensor for Measuring Electrostatic Fields in the Frequency Domain

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