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Właściwości przekształtnika sieciowego z filtrem LCL ze sprzężeniem od wspólnego pomiaru prądów cewek filtru

Iwański Grzegorz, Chustecki Patryk, Gałecki Andrzej

Przegląd Elektrotechniczny

2023

R. 99, nr 3

30--35

Artykuł przedstawia właściwości układu przekształtnika sieciowego z filtrem typu LCL z wykorzystaniem sprzężenia od wspólnego pomiaru prądu cewek filtru. Przedstawiono analizę porównawczą układów wykorzystujących sprzężenie od pojedynczego prądu jednej bądź drugiej cewki filtru LCL oraz możliwości poprawy odpowiedzi na wymuszenie prądu zadanego w układzie ze sprzężeniem zawierającym wyłącznie człon proporcjonalny. Przedstawiono wyniki symulacji i eksperymentu potwierdzającego pewne korzystne cechy wykorzystania wspólnego czujnika prądu.

The paper presents properties of grid converter with LCL filter utilizing a common measurement and feedback of filter inductors currents. Comparative analysis of single inductor current feedback (inverter side or grid side inductor of LCL filter) and improvement of response on reference current change using only proportional term in the feedback loop are presented. Simulation and experimental tests results confirming some positive features of single current measurement of both inductors currents are shown.

Contemporary conditions of information security

Gałecki Andrzej

System Safety : Human - Technical Facility - Environment

2021

Vol. 3, nr 1

289--295

In the age of the information society, determined by the evolution of digital technology, information has become an essential element of the functioning of every human being. Its acquisition, processing and distribution serves to satisfy the key areas of society's life and constitutes a necessary component of every decision-making process. These days became dominated by the increasing demand for information. The problem of its protection against unwanted obtaining (disclosure) has become a challenge for many scientific communities. This state of affairs has forced us to take a number of steps to ensure the security of useful information, characterized by accuracy, unambiguity, completeness and authenticity. The problem of information security is inseparably linked to the threats present in the cyberspace environment. They are commonly identified with the so-called computer crime, resulting in factors like: infiltration, obtaining passwords and other data used for logging in, identity theft, damage (blocking) of systems and their software. Information manipulation is a completely different and underestimated threat to rational decision-making process. Wherefore, useful information that is characterized by the expected properties, is exposed not only to destruction or unauthorized acquisition, but also to distortion. Rising anxiety about the credibility of the information received in the virtual space and the sources of its transmission forced the need to distinguish the real form from the one that was modified. The presented conditions prompted the author to propose solutions with regard to information security, determined by the difficulty of obtaining it and manipulating it.