Print Email Facebook Twitter A Novel Composite Sensor for UHF Partial Discharge and Gas State Measurement in GIS Title A Novel Composite Sensor for UHF Partial Discharge and Gas State Measurement in GIS Author Chen, Huan (Xi’an Jiaotong University) Zhang, Zhaoyu (Xi’an Jiaotong University) Guo, R. (TU Delft High Voltage Technology Group) Han, Xutao (Xi’an Jiaotong University) Zhang, Xuanrui (Xi’an Jiaotong University) Lin, Junhao (Xi’an Jiaotong University) Date 2024 Abstract The gas state of the insulating gas significantly impacts the development and extent of the partial discharge (PD) in gas-insulated switchgear (GIS). Correlating these two factors allows for a more comprehensive diagnosis of insulation defects. At present, the ultrahigh-frequency (UHF) method has been widely used for PD detection in GIS. However, the measurements of the insulating gas's state in the field are primarily conducted offline or at gas valves, providing ineffective data for reference. To address this challenge, this article introduces a novel composite sensor capable of simultaneous UHF and gas state measurements. Building upon the disk-type UHF sensor structure, the composite sensor integrates a gas state sensing unit with the micro-electromechanical systems (MEMS) sensor as the core. A robust shielding shell is designed through finite element simulation to ensure the safety of the sensor, with the maximum induced voltage and electric field strength on the sensing unit measuring 0.28 V and 414 V/m, respectively. The average UHF measurement sensitivity of the composite sensor reaches 13.3 mm. In addition, the composite sensor exhibits low errors (±0.2 °C, ±3 kPa, and ± 10 μ L/L), high consistency and repeatability in temperature, pressure, and moisture measurement. Finally, the composite sensor has demonstrated its capability to simultaneously and safely detect PD signals and the gas state within GIS. Subject Combined detectionelectromagnetic shieldinggas-insulated switchgear (GIS)gas statemicro-electromechanical systems (MEMS) sensorultrahigh frequency (UHF) To reference this document use: http://resolver.tudelft.nl/uuid:e9c748fa-0998-41d9-838f-c2bdb97b7d3a DOI https://doi.org/10.1109/TIM.2024.3372232 Embargo date 2024-09-01 ISSN 1557-9662 Source IEEE Transactions on Instrumentation and Measurement, 73, 1-10 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2024 Huan Chen, Zhaoyu Zhang, R. Guo, Xutao Han, Xuanrui Zhang, Junhao Lin Files file embargo until 2024-09-01