Corrosion in Low-Voltage Distribution Networks and Perspectives for Online Condition Monitoring

Abstract

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Advanced replacement strategies for low voltage distribution grids

“…One of the requirements for CBM is the availability of an approach towards condition assessment. Currently, options exist via data analysis [3] and measurement devices [4]. Where data analysis is not accurate enough, measurement devices are expensive or not yet available on a large scale.…”

“…In ref. [4] these phenomena are further investigated and a pilot on online condition monitoring is presented. The ultimate goal is to predict and prevent failures before they occur.…”

State of Health Prediction of Power Connectors by Analyzing the Degradation Trajectory of the Electrical Resistance

“…Condition monitoring is directly related to different methods for identifying changes occurring in a system due to the development of faults or the degradation of the SoH, thus generating an alarm to indicate a possible failure or degradation of the SoH [15]. On-line condition monitoring is an active field of research in power systems [16][17][18][19]. To apply effective predictive maintenance strategies and to reduce maintenance and unexpected outages and shutdown costs, there is an imperious need to detect anomalous or degraded behavior modes in the early stage, when the degraded behavior is still developing.…”

Thermal Distortion of Signal Propagation Modes Due to Dynamic Loading in Medium-Voltage Cables

“…From known propagation characteristics, the location can be determined and the severity of the defect can be assessed [1]. In addition, short faults are observed in live grids both in low-voltage and medium-voltage cables [1,2]. These events concern transient short circuits, typically lasting for a fraction of a power cycle, which is too short to directly cause a system outage.…”