This study proposes a novel design of soft-switching based bidirectional converter for the applications in energy storage systems. By implementing an additional auxiliary circuit to the conventional non-isolated converter, the proposed converter inherits better efficiency with minimised turn-on losses....

The diagnostic measurement and tests of transformers are essential. Also, the costs of diagnostic tests are considerable. Hence, proposing a method to determine an economic-technical sequence-bases set of diagnostic tests for transformers is useful and interesting. In this paper, a new metho...

Are showed the necessity of the functioning of control automatization systems of conditions of bulk power system with renewable energy sources (RES) by taking into account the sensitivity. It is advisable to carry out optimal control of the bulk power system by introducing control&...

This work deals with the “Full-Core” VVER-1000 calculation benchmark which was proposed on the 26th Symposium of AER [1]. Recently, the calculation benchmarks “Full-Core” VVER-440 [2] and its extension [3] have been introduced in the AER community with positive response [4, 5]. Therefor...

This work deals with the updated reference solution of the Full-Core VVER-440 PK-3+ benchmark which is based on the extended calculation benchmark from 2018. [1] The modification consists of a new type of fuel assembly with PK-3 design in the loading pattern. The main aim ...

Thermocouple located near the coolant outlet of the fuel assembly head may indicate a temperature biased by radiation heating and subsequently affect accuracy of incore measurements. The analysis splits into two parts

The article features analysis of all noted as well as new factors that inluence treatment results by means of compression. The therapy outcome is last but not least dependent upon abilities of patient and on theoretic and practical skills of medical staff members. Selection of...

The article is introduced with short summary of anatomical and pathological causative data of chronic venous insuficience. Patophysiological consequences and their influence upon indication and optimalisation of compressive treatment are closely discussed. Dependence of physical rules according to that...

The latest ENDF/B nuclear data library released in 2018 is the result of a new international approach to develop evaluated nuclear data for general purpose applications. In order to use the latest ENDF/B-VIII.0 nuclear data library in safety analyses, validation calculations for&#x...

This paper presents a very efficient design procedure for a high-performance microstrip lowpass filter (LPF). Unlike many other sophisticated design methodologies of microstrip LPFs, which contain complicated configurations or even over-engineering in some cases, this paper presents a straightforward ...

The possibility and expediency of application of the principle of least action (PLA) in the optimum control of conditions of the electric power system (EPS) is shown. The loss of active power and electricity was taken as the criterion of optimality. The algorithm for determini...

Energy management systems (EMSs) play an important role in the optimal operation of prosumers. As an essential segment of each EMS, the load forecasting (LF) block enhances the optimal utilization of renewable energy sources (RESs) and battery energy storage systems (BESSs). In this...

The article analyzes existing methods of diagnosing power transformers (PTs). The technique of experiment planning using D-optimal plans is investigated. According to the results of the study, a D-optimal plan of the frequency response measurements was created, which defines the algorithm of...

Abnormal resonance overvoltagesoccur due to the emergence of non-sinusoidal modes of bulk electrical networks. The considered type of overvoltage refers to durable internal overvoltages, which have characteristics that can exceed the maximum permissible magnitude with a certain correlation of the ...

COVID-19 outbreak has put the whole world in an unprecedented difcult situation bringing life around the world to a frightening halt and claiming thousands of lives. Due to COVID-19's spread in 212 countries and territories and increasing numbers of infected cases and death tol...

Purpose – The purpose of this paper is to present the calibration of a laser welding model suitable for solving problems with input data that are either unknown or known only approximately. Design/methodology/approach – The calibration starts from the measured temperature profile&#...

Purpose – This paper aims to propose a number of approaches to reduce the temperature gradient of titanium billets in the heat treatment process. Design/methodology/approach – Modeling physical processes in the induction unit is calculated by the finite element method. Required pow...

Growing energies of particles at modern or planned particle accelerator experiments as well as cosmic rayexperiments require particle identification at gamma-factors (𝛾) of up to∼105. At present there are no detectorscapable of identifying charged particles with reliable efficiency in this range...

Purpose–The purpose of this paper is the presentation of an electrical equivalent circuit for inductivecomponents as well as the methodology for electrical parameter extraction by using a 3 Dfinite elementanalysis (FEA) tool.Design/methodology/approach–A parameter extraction based on energies has ...

This article adds more information to the problem of natural ester use as an electroinsulating uid in cellulose paper-oil systems, e.g., for use in power transformers. An accelerated thermal aging (120, 140 and 160 C) of samples consisting of cellulose paper (transformerboard), a t...