Abstract
In this paper, we propose and demonstrate a gas-insulated switchgear (GIS) breakdown discharge detection system based on improved phase-sensitive optical time domain reflectometry (φ-OTDR) assisted by 3D-printed sensing elements. The sensing element is manufactured by a material with a high Poisson ratio for enhancement of the sensitivity of φ-OTDR to the acoustic emission detection during the breakdown discharge process. In our experiment, seven 3D-printed sensing elements incorporating with optical fibers are attached tightly onto the shell of the GIS, which are monitored by φ-OTDR to localize and detect the acoustic emission signal resulted from the breakdown discharge. Ultimately, thanks to the phase demodulation, acoustic signals induced by the breakdown discharge process can be captured and recovered. Furthermore, the time delay analysis of detected signals acquired by different sensing elements on the GIS breakdown discharge unit is able to distinguish the location of the insulation failure part in the GIS unit. It suggests that the φ-OTDR incorporated with 3D printing technology shows the advantage of robustness in GIS breakdown discharge monitoring and detection.
Highlights
High-voltage (HV) cable and gas insulated switchgear (GIS) are the part and parcel of HV power supply and transmission system whilst their health structure monitoring is always vital for the HV power system [1]
We experimentally demonstrate a gas-insulated switchgear (GIS) breakdown discharge detection based on φ-OTDR incorporated with 3D-printed cylindrical elastomer sensing elements
Breakdown unit shell is able to further localize the part of insulation failure inside the GIS devices. This suggests that the proposed GIS breakdown discharge detection system with enhanced sensitivity shows great advantage in anti-electromagnetic interference and the large-scale detection range, paving way for practical application in HV power systems
Summary
High-voltage (HV) cable and gas insulated switchgear (GIS) are the part and parcel of HV power supply and transmission system whilst their health structure monitoring is always vital for the HV power system [1]. As the pulse repetition rate of the φ-OTDR is 10 kHz, the time delay of detected signals acquired by three sensing elements on the outer surface of the GIS breakdown unit shell is able to further localize the part of insulation failure inside the GIS devices. This suggests that the proposed GIS breakdown discharge detection system with enhanced sensitivity shows great advantage in anti-electromagnetic interference and the large-scale detection range, paving way for practical application in HV power systems. We propose a cylindrical elastomer wound by bend-insensitive optical fiber to serve as the sensing element for the sensitivity enhancement in breakdown discharge detection.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
