This paper presents a positive approach in an optimized design of combinatory unified power-quality conditioner (UPQC) and superconducting fault current limiters (SFCLs). is based on normalized simulated annealing algorithm compared with analytic hierarchy process objective optimization. The optimization for simultaneous computes produces three-dimensional alignments Pareto front at the end run. results show that SFCL can reduce volt-ampere rating UPQC by limiting current, thereby reducing...

The superconducting magnetic energy storage (SMES) system technology has the potential to bring real power characteristic utility transmission and distribution systems. principal object of this paper is provide a positive approach in an optimized design SMES solenoid coil, ensuring desired capacity based on normalized simulated annealing (SA) algorithm. optimization algorithm for simultaneous computes produces 2-D alignments Pareto front at end run. process SA verified by another strategy...

Since the flux leakage phenomenon is dominant in inner and outer radii of axial magnetic gears (AFMGs), a prominent overestimation torque prediction obtained by 2-D analytical method (AM) comparison with 3-D finite-element (FEM) simulations. The main motivation this paper to present an improved quasi-3-D AM (IQAM), which improvement amendment simple effective radial dependence modeling tangential field distribution AFMGs. This IQAM plays important role reliable accurate static transient...

Inequalities of Mandelstam-Tamm and Margolus-Levitin type provide lower bounds on the time it takes for a quantum system to evolve from one state into another. Knowledge such bounds, called speed limits, is utmost importance in virtually all areas physics, where determination minimum required process interest. Most inequalities found literature have been derived growth estimates Bures length, which statistical distance measure. In this paper we derive by differential geometric methods,...

The basic concept of superconductive magnetic gears (SMGs) is to maximize the benefits and impact gearing technology by highlighting future perspective SMGs produce a more efficient compact system. This paper deals with new analytical method (AM) for calculation field distribution in an SMG. A 2-D AM based on Laplace's partial differential equations scalar potential different subdomains gear introduced solved considering corresponding boundary conditions. proposed shows significant reduction...

Limiting operation of a superconducting fault current limiter (SFCL) depends on multilateral interaction effects among the three critical delimited superconductivity parameters, namely, current, temperature, and magnetic field, as well dependent impedance in addition to other specifications external power system. As such, considerable efforts are now being invested developing strategies for design fabrication new SFCLs involving an interplay or synergy between electrical conductivity,...

This study carried out a comparison between cement grouting and chemical grouting, using epoxy polyurethane, with respect to their effects on the shear behavior of joints. Joint replicas, three different grades surface roughness, were molded grouted by means grouts various mixtures. To investigate behavior, samples subjected direct tests under constant normal load (CNL) condition. According results obtained, improves overall strength rock All yielded higher maximum residual in non-grouted...

The electromagnetic environment within a substation is very complex. Substations represent an intricate interconnected collection of devices that serve as wave emitters and receptors. Transient emissions-electromagnetic interference (EMI)-are generated during the switching disconnector circuit breakers (CBs) may cause malfunction or damage to electronic equipment positioned nearby if appropriate immunity measures are not taken. couple significant energy through common-mode currents cable...

In this paper, a diversified multiobjective optimization of transformer built from high-temperature superconducting (HTS) windings is presented. The main goal an effective approach for optimal HTS design that involves the determination selective parameters when selected objectives are optimized. However, usually complex functions variables and available only analysis finite-element model structure. As such, requires need advanced numerical techniques simulation by FLUX software. addition,...

Rogowski coils are increasingly used to measure AC, high amplitude and transient currents in power industry. One of the most important applications them is current measurement industrial electronic devices. Since they have no iron core, not saturable. However, due this phenomenon, their mutual inductance varies by changing structures. In paper, effects two kinds cross-sections coils, named Circular Rectangular, on compared variations investigated. Also, methods for increasing presented....

This paper presents a hybrid numerical approach combining an improved Time Domain Finite Element-Boundary Integral (FE-BI) method with Physical Optics (TDPO) for calculations of electromagnetic scattering 3-D combinative- complex objects. For complex-combined objects containing small size and large parts, using TDPO is appropriate coupling between two regions. Therefore, our technique calculates the complexity help FE-BI combinatory structures by TDPO. The hybridization algorithm restrictive...

The inductive-type superconducting fault current limiters (LSFCLs) mainly consist of a primary copper coil, secondary complete or partial superconductor cylinder, and closed open magnetic iron core. Satisfactory performance such device significantly depends on optimal selection its employed materials construction dimensions, as well electrical, thermal, parameters. Therefore, it is very important to identify comprehensive model describing the LSFCL behavior in power system prior fabrication....

Here, different feasible configurations of passive permanent magnet bearings (PMBs) are presented and compared with each other. In these configurations, stiffness is improved by adding iron cores air intervals between magnets. Bearings opposite magnetisation stacking (standard) rotating (Halbach) studied here. A two‐dimensional planner model used to calculate the magnetic field stiffness. The optimisation will be performed for obtaining maximum per volume ratio. results show that standard...

The main limitation of magnetic gears is their relatively low torque density. Therefore, a novel structured high density magnetic-geared permanent magnet (MGPM) machine, which combines the advantages conventional MGPM machine and gear to enhance considerably achieve low-speed high-torque operation, proposed in this study. However, there are different structures for increasing machine. order demonstrate structure, it compared with other structures, using finite element method. Moreover, can...

Abstract Microgrids play a pivotal role in modern power distribution systems, necessitating precise control methodologies to tackle challenges such as performance instability, especially during islanding operations. This paper introduces an advanced strategy that employs artificial intelligence, specifically deep neural network (DNN) predictions, enhance microgrid performance, particularly mode where voltage and frequency (VaF) deviations are critical concerns. By utilizing real‐time data...

Mechanical stresses of magnetically induced origins are becoming more serious with the trend high-temperature superconductor (HTS) heavy-current transformer (HCT) applications. forces in HTS HCTs that act on windings generated by interaction between current density and leakage flux density. This paper presents calculation mechanical force distribution high-current windings. requires need for advanced numerical techniques simulation studies using finite-element method adapting two auxiliary...

The geometric phase has found a broad spectrum of applications in both classical and quantum physics, such as condensed matter computation. In this paper, we introduce an operational for mixed states, based on spectral weighted traces holonomies, prove that it generalizes the standard definition which is interferometry. We also higher order phases, under fairly weak, generically satisfied, requirement, there always well-defined some order. Our approach applies to general unitary evolutions...

Passive magnetic bearings offer significant advantages relative to common active bearings, such as simple, robust, and efficient structure. Permanent magnet (PM) passive are composed of opposing rings on rotor stator. Although their stiffness has been improved using alternating or Halbach magnetisations in many previous studies, they still suffer from lack damping force. In this study, the optimal design is focused a combination PM bearing eddy current damper by adding conductive layer along...

AC loss is one of the important parameters in HTS (high temperature superconducting) devices. Among power devices, transformer an essential part electrical system. The losses tape depend on magnetic field. One techniques usually adopted to mitigate unwanted field using a system coils that produce opposite incident one, reducing total In this paper adding two auxiliary windings proposed. proper use these could reduce leakage flux and, therefore, loss. A mathematical model used describe...

This paper presents an improved simulated annealing (SA) algorithm for multiobjective optimization, which is a positive approach in the design of high-temperature superconducting (HTS) fault-current limiters (SFCLs).The main goal this to achieve effective and feasible structural HTS FCLs by means decision-making techniques, based on normalized SA. The combination electrical thermal models purpose-designed resistive-type FCL defined as component PSCAD/EMTDC simulations from proposed method...