Transients in Power Systems

Power system engineering largely focuses on steady state analysis. The main areas of power system engineering are power flow studies and fault studies - both steady state technologies. But the world is largely transient, and power systems are always subject to time varying and short lived signals. This technical report concerns several important topics in transient analyses of power systems. The leading chapter deals with a new analytical tool-wavelets-for power system transients. Flicker and electric are furnace transients are discussed in Chapters I1 and IV. Chapter 111 deals with transients from shunt capacitor switching. The concluding chapters deal with transformer inrush current and non simultaneous pole closures of circuit breakers. This report was prepared by the students in EE532 at Purdue University. When I first came to Purdue in 1965, Professor El-Abiad was asking for student term projects which were turned into technical reports. I have \u27borrowed\u27 this idea and for many years we have produced technical reports from the power systems courses. The students get practice in writing reports, and the reader is able to get an idea of the coverage of our courses. I think that the students have done a good job on the subject of transients in power systems

Applications and measurement techniques for a reliable and affordable innovative power quality analysis system

Viene preso in considerazione e analizzato il problema della valutazione e dellamisura della qualità dell’energia elettrica al fine di poter ottenere uno strumento che sia in grado di fornire informazioni affidabili e precise, ma senza comportare necessariamente un costo eccessivamente oneroso perchè ottenute con sistemi anche non tradizionali, e utili alla disamina dei problemi riscontrabili nel sistema elettrico favorendone l'individuazione delle cause e quindi la loro risoluzion

Електромагнітна сумісність у системах електропостачання

The textbook is devoted to electromagnetic processes connected both with conducted and field electromagnetic interferences. Special attention is paid to interharmonic electromagnetic interference. Questions of electromagnetic compatibility in power networks with wind electric sets, problems of voltage dips and voltage impulses are considered. Active filters are considered as a specific problem of electromagnetic compatibility. Influence of electromagnetic fields on biosphere, of electromagnetic ecology, economic and legal problems of electromagnetic compatibility are presented

Power supply quality assessment in power systems with distributed generation

The use of renewable energy installations in local systems affects the reliability of power supply. At the moment, in order to assess the reliability of power supply in local systems with renewables, there are a large number of indicators that are not directly related to each other. Reliability is one of the key concepts in electricity. The reliability of the power system is a feature of the continuous supply of electricity to consumers to meet their needs. The concept of reliability includes such features as failure-free, durability and maintainability. But this terminology has not become commonplace, it has not embraced or streamlined many terms for reliability. Thus, many authors use the concepts of structural, mode (functional) and balance reliability. This separation is conditional, first, to simplify the solution of the task of assessing the reliability of complex networks, and secondly, based on quantitative assessments of the components, measures can be taken to improve the level of reliability. Changes in energy sector related to the implementation of market relations and distributed generation require an update of terminology that can be used to decompose the reliability assessment task. Because assessing the reliability of distribution grids in today's environment is quite a challenge. The purpose of the article is to analyze the reliability of power supply for local systems with renewables. One of the main issues in this topic, despite the large amount of research work involved, is the uncertainty of the method for calculating the reliability of power supply in Microgrids. The paper assesses the reliability of power supply and proves the need to introduce new indicators for local systems with renewables, since distributed energy sources, including renewables, affects systems reliability. Such indicators will allow assessing the reliability by each factor individually, and will show the impact of each factor on the overall state of the system