This paper presents a novel fault diagnosis method for oil-immersed on-load tap changers (OLTC) to address the issue of limited diagnostic accuracy. The proposed combines analysis mechanical vibration signals and high-frequency current from contact pair, aiming improve precision diagnosis. To begin with, an experimental platform was used simulate OLTC contact, enabling collection under differen...

Considering the possible overvoltage caused by high-penetration photovoltaics (PVs) connected to distribution networks (DNs), a cluster partition-based voltage control combined day-ahead scheduling and real-time for is proposed. Firstly, community detection algorithm utilizing coupling quality function introduced divide PVs into clusters. Based on partition, (DAS) proposed with objective of min...

<p class="Abstract">The conventional three-phase alternating current (AC) to direct (DC) converter can be modified using two isolated-gate bipolar transistor (IGBT) as by-pass switches connected tapping points on the secondary side of transformer. This scheme yields a reduction in both harmonic contents and reactive volt-ampere absorption. possibly eliminates need for an on-load tap-chang...

This paper presents the design, fabrication and characterization of a device able to exchange the tip part (so-called the tools) of a two fingered microgripper. The principle of this tool changer is based on the use of a thermal glue whose state (liquid or solid) is changed by heating or cooling. Several kinds of pairs of tools have been designed. The suitable pair of tools can be chosen accord...

The availability of accurate data is fundamental for several monitoring and control applications modern power grids. Nevertheless, the knowledge critical data, such as transmission line transformer parameters, often affected by uncertainty. This can lead to important problems in correct management systems. In spite a infrastructure that being renewed due new generation devices providing synchro...