This paper reports on the development and testing of a novel barrier sensor for UHF Partial Discharge (PD) detection in gas-insulated equipment. The sensor features a unique dual-slot planar antenna backed by an air-filled cavity. The dual-slot arrangement allows different parts of the antenna to resonate at different frequency ranges in the UHF spectrum. As a result, the sensor exhibits broader bandwidth and higher sensitivity than other barrier sensors. Finite Element Analysis simulations have been used to optimize the sensor design. Furthermore, testing using a specially made PD test rig, GTEM cell testing and testing on a gas-insulated line section in the high voltage laboratory, have validated the simulation results and the capabilities of the sensor. The Dual-Slot Barrier (DSB) sensor exhibits a bandwidth of 0.3 – 2.0 GHz with a mean effective height of 13 mm, and an effective height above 2 mm for 90% of the frequency range. The sensor can be used with both wideband instruments, such as oscilloscopes, and narrow band instruments such as frequency downconverters. Additionally, its optimized dimensions and unique replaceable sealing attachment ensure maximum compatibility for retrofitting on a wide range of equipment.

中文翻译：

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用于气体绝缘设备局部放电检测的双槽屏障传感器

本文报告了用于气体绝缘设备中 UHF 局部放电 (PD) 检测的新型屏障传感器的开发和测试。该传感器具有独特的双槽平面天线，由一个充满空气的腔体支撑。双槽布置允许天线的不同部分在 UHF 频谱的不同频率范围内谐振。因此，该传感器比其他屏障传感器具有更宽的带宽和更高的灵敏度。有限元分析模拟已用于优化传感器设计。此外，使用特制的PD测试台进行测试、GTEM电池测试和高压实验室气体绝缘线段测试，验证了模拟结果和传感器的能力。双槽屏障 (DSB) 传感器的带宽为 0.3 – 2。0 GHz，平均有效高度为 13 毫米，有效高度在 90% 的频率范围内高于 2 毫米。该传感器可与宽带仪器（例如示波器）和窄带仪器（例如下变频器）一起使用。此外，其优化的尺寸和独特的可更换密封附件确保了在各种设备上改装的最大兼容性。