The presence of overvoltage can cause the insulation deterioration and excite the partial discharges (PD) in gas-insulated switchgear (GIS), and it is necessary to detect the overvoltage and PDs simultaneously to evaluate the insulation performance. A novel GIS internal composite sensor for PD detection and overvoltage measurement is proposed in this paper. The proposed sensor is mainly formed with a disc-type monopole UHF sensor and an overvoltage sensor. The effectiveness and sensitivity of the sensor are tested on a designed platform under power frequency voltage, switching impulse, lightning impulse, and oscillating lightning impulse, respectively. Experiment results show that the proposed sensor can be used to detect overvoltage and UHF signals effectively and is expected to help in the GIS condition evaluation.

中文翻译：

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一种用于 GIS 中过电压和 UHF 局部放电测量的新型复合传感器

过电压的存在会导致气体绝缘开关设备（GIS）绝缘劣化并激发局部放电（PD），因此需要同时检测过电压和局部放电以评估绝缘性能。本文提出了一种用于局部放电检测和过电压测量的新型 GIS 内部复合传感器。所提出的传感器主要由圆盘式单极超高频传感器和过电压传感器组成。在设计的平台上分别在工频电压、操作冲击、雷电冲击和振荡雷电冲击下测试了传感器的有效性和灵敏度。实验结果表明，所提出的传感器可用于有效检测过电压和超高频信号，有望有助于GIS状态评估。