A Unified Sensor Platform for Investigating Corona Effects on Overhead Lines
Abstract
Outdoor long-term continuous measurements of overhead conductor corona are needed to better plan high-voltage power grids. Most of the time, only single aspects of corona are being measured over short periods of time in controlled environements using complex and expensive sensors. This paper presents a single unified wireless sensor platform to reliably measure three distinct corona-related quantities on high-voltage lines. Namely, the corona current through the line, the ground-level electric field, and the ground-level ion current density. The platform is a distributed, cost-effective, low-power IoT system that enables outdoor measurements of lines exposed to real weather over extended periods of time allowing to highlight correlations across seasons.
With example measurements, the importance of having heterogeneous sensors measuring different corona effects in a unified way is demonstrated. The corona current sensor is shown to operate at up to hundreds of kV while still providing an accuracy of 83nA and average power consumption of 1mW.
Corona effects, collected every 4s with a sampling frequency up to 1kHz, make it possible to visualise correlations with environmental parameters such as humidity, precipitation, and wind speed in novel ways through on-board processing of the collected data. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000630834Publication status
publishedExternal links
Journal / series
IEEE Transactions on Instrumentation and MeasurementVolume
Pages / Article No.
Publisher
IEEESubject
Corona; Energy; Grid; Internet of Things (IoT); Low powerOrganisational unit
03869 - Franck, Christian / Franck, Christian
01225 - D-ITET Zentr. f. projektbasiertes Lernen / D-ITET Center for Project-Based Learning
Funding
187087 - AeroSense: a novel MEMS‐based surface pressure and acoustic IoT measurement system for wind turbines (SNF)
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