Abstract
Diagnostic and condition monitoring of power transformers are key actions to guarantee their safe operation. The subsequent benefits include reduced service interruptions and economic losses associated with their unavailability. Conventional test methods developed for the condition assessment of power transformers have certain limitations. To overcome such problems, fiber optic-based sensors for monitoring the condition of transformers have been developed. Flawlessly built-up fiber optic-based sensors provide online and offline assessment of various parameters like temperature, moisture, partial discharges, gas analyses, vibration, winding deformation, and oil levels, which are based on different sensing principles. In this paper a variety and assessment of different fiber optic-based diagnostic techniques for monitoring power transformers are discussed. It includes significant tutorial elements as well as some analyses.
Highlights
Power transformers, among the foremost expensive equipment of power grids, are essential to the reliable delivery of electricity in the network
A novel way to obtain accurate online Partial discharges (PDs) localization was enabled by this sensor for power transformers, especially for PD events occurring inside windings or in the oil ducts between windings
Samsudin et al [82] compared two Fiber Bragg grating (FBG) sensors based on different palladium (Pd) coating ratios (100% palladium (Pd100 ) and a mixture of palladium:chromium (Pd58 Cr42 ) of 58:42): The Pd100 sensor showed a higher sensitivity than the Pd58 Cr42 ; the response range was limited to lower hydrogen content
Summary
Among the foremost expensive equipment of power grids, are essential to the reliable delivery of electricity in the network. Conventional test methods typically use electrical sensors or chemical analysis for evaluating transformer condition. These methods have important defects concerning real-time measurements due to high electromagnetic interference or high time consumption [3]. To overcome such problems, fiber optic-based sensors that allow assessing the condition of the transformers have emerged. Fiber optic devices were used to measure optical absorption, fluorescence refractive index, pressure, and strain They are increasingly being used in structural health monitoring, and have many uses in chemical sensing. Examples of of monitoring methodsfor forevaluating evaluating condition an oil-filled power transformer power transformer [4].[4]
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