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近年来,随着用电单位对供电可靠性要求日益提高,以及变电站基于状态检修的发展需求,针对各种高压设备的在线检测系统应运而生。如何将这些新技术应用于现有的变电站,实现智能化改造是一个全新的富有挑战性和应用价值的课题。云南电网公司昆明供电局在220kV官渡变电站上对这一课题进行了技术细节探索。本论文详细介绍变电站上的最重要设备之一电力变压器智能化中的一些关键技术,包括基于变压器温度在线监测的寿命评估、过载能力评估,基于变压器油气微水监测的故障风险评估,基于超高频局部放电监测的自动阀值小波去噪技术。
In recent years, with the increasing demand for reliability of power supply units, as well as the substation based on the status of the development of maintenance requirements, for a variety of high-pressure equipment on-line detection system came into being. How to apply these new technologies to existing substations to realize intelligent transformation is a brand new challenging and applied value topic. Yunnan Power Grid Company Kunming Power Supply Bureau in the 220kV Guandu substation on the subject of technical details to explore. This dissertation introduces some key technologies of power transformer intelligent, such as life assessment based on on-line monitoring of transformer temperature, assessment of overload capability, fault risk assessment based on transformer micro-water monitoring of oil and gas, Automatic Threshold Wavelet Denoising Technology for Frequency Partial Discharge Monitoring.