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Application of HFCT and UHF Sensors in On-Line Partial Discharge Measurements for Insulation Diagnosis of High Voltage Equipment

机译：HFCT和UHF传感器在高压设备绝缘诊断在线局部放电测量中的应用

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摘要

Partial discharge (PD) measurements provide valuable information for assessing the condition of high voltage (HV) insulation systems, contributing to their quality assurance. Different PD measuring techniques have been developed in the last years specially designed to perform on-line measurements. Non-conventional PD methods operating in high frequency bands are usually used when this type of tests are carried out. In PD measurements the signal acquisition, the subsequent signal processing and the capability to obtain an accurate diagnosis are conditioned by the selection of a suitable detection technique and by the implementation of effective signal processing tools. This paper proposes an optimized electromagnetic detection method based on the combined use of wideband PD sensors for measurements performed in the HF and UHF frequency ranges, together with the implementation of powerful processing tools. The effectiveness of the measuring techniques proposed is demonstrated through an example, where several PD sources are measured simultaneously in a HV installation consisting of a cable system connected by a plug-in terminal to a gas insulated substation (GIS) compartment.
机译：局部放电（PD）测量为评估高压（HV）绝缘系统的状况提供了有价值的信息，有助于其质量保证。过去几年中，已经开发出了专门设计用于执行在线测量的各种PD测量技术。进行此类测试时，通常会使用在高频段工作的非常规PD方法。在PD测量中，信号的采集，后续的信号处理以及获得准确诊断的能力取决于选择合适的检测技术并采用有效的信号处理工具。本文提出了一种优化的电磁检测方法，该方法基于宽带PD传感器的结合使用，用于在HF和UHF频率范围内进行测量，并实现了功能强大的处理工具。通过一个示例证明了所提出的测量技术的有效性，其中在由电缆系统组成的高压设备中同时测量了几种PD源，该电缆系统通过插入式端子连接到气体绝缘变电站（GIS）隔室。

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