智能电网高压GIS超高频PD监测诊断技术

Zainuddin Aboo, Yogaraja Singaravelu, Rejimon Rasheed
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引用次数: 1

摘要

高压气体绝缘开关设备(GIS)和高压气体绝缘线路(GIL)是输电智能电网的重要组成部分。GIS和GILs具有可靠性高、寿命长的特点。这些类型设备的任何故障都会直接降低电网的可靠性并增加维护成本。故障分析表明,绝缘劣化是大多数GIS故障的主要原因。由于气体绝缘装置是密封结构,从外部很难发现内部的初期故障。因此,基于智能状态的资产管理工具来检测早期故障以避免功能故障是必需的。在线局部放电(PD)检测已被证明是最有效的绝缘退化诊断工具。超高频(UHF)技术和声学手段已广泛用于PD检测,以实现可靠、经济地延长现有工厂的寿命。本文介绍了水电局在GIS/GIL在线UHF PD诊断方面的最新进展。它还探讨了在线PD监测作为及时检测潜在故障的有说服力的基于状态的技术的优势。本文还演示了与PD监测相关的实际场景,从而提高了电网的可靠性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Diagnostic Technique with UHF PD Monitoring of HV GIS in Smart Grid
High voltage gas insulated switchgear (GIS) and lines (GIL) are considered as essential elements in Transmission Smart Grids. GIS and GILs are characterized by a high degree of reliability and long lifetime. Any failure in these types of equipment directly reduces grid reliability and increases maintenance costs. The failure analysis divulges that insulation deterioration is a principal factor in most of the breakdowns of GIS. Since gas-insulated apparatus are sealed structures, it is difficult to find internal incipient faults from outside. As such, intelligent condition-based asset management tools to detect the incipient faults to avoid functional failure is mandatory. Online partial discharge (PD) detection has been proven as the most effective tool for insulation degradation diagnosis. Both ultra-high frequency (UHF) technique and acoustic means have been popularly used in PD detection to enable the reliable, cost-effective life extension of existing plants. This paper presents state of the art in GIS/GIL online UHF PD diagnostics experienced by DEWA. It also explores the advantages of online PD monitoring as persuasive condition-based techniques for timely detection of potential faults. The paper also demonstrates real-life scenarios related to PD monitoring which increases the reliabilty of the grid.
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