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1

Solar power plant with distributed system of PV panels

Świderski Mariusz, Gwóźdź Michał

Przegląd Elektrotechniczny

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2019

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R. 95, nr 2

55--58

EN

In the work the other approach to a photovoltaic system is presented. With regard to an improvement of reliability of a solar system, maintaining and improving system’s efficiency, authors proposed conception of the distributed PV system. This system consists of a set of individual small PV panels, while a single panel is connected to a low power converter, equipped with a pulse transformer. The converters work at a common energy container (battery). Thus, in case of failure of a single converter (or panel) the system is able to work properly with small only decrease of an output power, apart, maintenance of system operation is facilitated. In addition, due to all converters operate independently, individual environmental conditions (e.g. panel’s temperature) can be respected so system’s efficiency can be improved. In the work basics of system operation and selected system’s simulation model findings are presented.

PL

W pracy przedstawiono inne podejście do struktury systemu fotowoltaicznego. W odniesieniu do poprawy niezawodności działania systemu, obniżenia jego kosztów utrzymania i poprawy wydajności pracy, autorzy zaproponowali koncepcję tzw. rozproszonego systemu ogniw PV. System ten składa się z zestawu niewielkich paneli PV gdzie, pojedynczy panel jest dołączone do przekształtnika energoelektronicznego małej mocy, wyposażonego w transformator impulsowy. Transformator zapewnia mu indywidualną izolację galwaniczną. Konwertery pracują na wspólny zasobnik energii w postaci baterii LiION. Tak więc, w przypadku awarii pojedynczego konwertera (lub panelu), system może działać dalej, przy zmniejszonej mocy wyjściowej. Ułatwiona jest również obsługa (naprawa) systemu. Ponadto, ponieważ konwertery działają niezależnie od siebie, mogą brane być pod uwagę indywidualne warunki środowiskowe dla każdego panelu – na przykład jego temperatura, czy stopień zaciemnienia. W niniejszej pracy przedstawiono podstawy działania systemu i wybrane wyniki badań modelu symulacyjnego pojedynczego panelu.

2

A hybrid scheduler for many task computing in big data systems

Vasiliu L., Pop F., Negru C., Mocanu M., Cristea V., Kolodziej J.

International Journal of Applied Mathematics and Computer Science

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2017

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Vol. 27, no. 2

385--399

EN

With the rapid evolution of the distributed computing world in the last few years, the amount of data created and processed has fast increased to petabytes or even exabytes scale. Such huge data sets need data-intensive computing applications and impose performance requirements to the infrastructures that support them, such as high scalability, storage, fault tolerance but also efficient scheduling algorithms. This paper focuses on providing a hybrid scheduling algorithm for many task computing that addresses big data environments with few penalties, taking into consideration the deadlines and satisfying a data dependent task model. The hybrid solution consists of several heuristics and algorithms (min-min, min-max and earliest deadline first) combined in order to provide a scheduling algorithm that matches our problem. The experimental results are conducted by simulation and prove that the proposed hybrid algorithm behaves very well in terms of meeting deadlines.

3

Enterprise service bus architecture for the big data systems

Orłowski C., Szczerbicki E., Grabowski J.

Management and Production Engineering Review

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2014

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Vol. 5, No. 1

28--31

EN

This paper presents the construction of the enterprise service bus architecture in data processing resources for a big data decision-making system for the City Hall in Gdansk. The first part presents the key processes of bus developing: the installation of developing environment, the database connection, the flow mechanism and data presentation. Developing processes were supported by models: KPI (Key Processes Identifier) and SOP (Simple Operating Procedures) (also connected to the bus). The summary indicates the problems of the bus construction, especially processes of routing, conversion, and handling events.