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1

Sun trajectory modeling for specific location using PV measured data

Petrović I., Šimić Z., Tomiša T.

Przegląd Elektrotechniczny

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2015

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R. 91, nr 11

275-279

EN

In order to research the PV module characterization it was necessary to develop the Prototype PV characterization station. Among other possibilities derived from the measured results of Prototype PV characterization station it is also possible to model the Sun trajectory at installation location. Such measured results can be used to model Sun trajectory. Also, the Sun trajectory generated using presented model is verified with conventional analytical model Sun trajectory. Some conclusions for new approach are presented and discussed.

PL

Przy charakteryzacji prototypu stacji fotowoltaicznej zalecane jest modelowanie trajektorioi słońca. Przedstawiono taki model wykonany na podstawie badań eksperymentalnych.

2

Generic Model of Coastal Distribution Network for Power System Harmonics Studies

Strugar V. L., Katic V. A., Milanovic J. V.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 1a

149--155

EN

The paper presents a generic model of typical coastal distribution network developed for power quality studies. Its composition is based on number of measurements performed over long period of time at different connection points in existing distribution network. All relevant elements of the network are fully described and discussed. The generic model can be used for benchmarking results of power system studies, in particular harmonic studies, for coastal regions network including specific types of consumers like hotels, resorts, marinas, airports, apartment buildings, market centres and moderate size industrial plants.

PL

W artykule zaprezentowano typową nadmorską sieć przesyłową z przeznaczeniem do analizy jakości energii. Opisano dokładnie wszystkie elementy sieci oraz długookresowe wyniki badań. Celem jest analiza takiej sieci z uwzględnieniem jej typowych odbiorców takich jak hotle, centra handlowe, apartamentowce itp.

3

Distribution Grid Monitoring: challenges and related complexity

Monti A., Ponci F., Liu J., Angioni A.

Przegląd Elektrotechniczny

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2013

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R. 89, nr 12

7-16

EN

Monitoring of distribution grids is an increasingly relevant topic in the smart grid framework. The straightforward migration of transmission system technologies in this application area is practically often unfeasible. Functional specifications that the monitoring in distribution network should provide are deduced here from the features of the new distribution systems. In light of this, possible techniques for dynamic phasor measurements and state estimation for distribution networks are critically presented.

PL

W koncepcji sieci inteligentnych nadzór sieci staje się zagadnieniem o rosnącym znaczeniu. Bezpośrednie przeniesienie technologii systemów transmisyjnych do inteligentnych systemów rozdzielczych jest jednak często praktycznie niewykonalne. Operacyjne właściwości, które takie systemy powinny zapewniać wyprowadzne są w tym artykule z właściwości nowych systemów rozdzielczych. Zgodnie z takim punktem widzenia, w artykule analizuje się możliwe technologie pomiarów fazowych oraz metody przewidywania stanu systemów rozdzielczych.

4

A study on the feasibility and effectiveness of digital filter application for harmonic and interharmonic measurement in compliance with IEC 61000-4-7

Ferrigno L., Landi C., Laracca M., Luongo C.

Metrology and Measurement Systems

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2007

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Vol. 14, nr 4

577-593

EN

Large scale monitoring of power quality in electrical power plants is nowadays a pressing need due to the liberalization of the electrical market in many countries and the deeper interconnections of electrical networks. Many instruments are today available on the market. Even if they provide good accuracy and measurement capability, they are generally developed for single point measurements. Their use in large scale monitoring leads to high costs. In this framework research activity, the authors aim at the realization of a measurement instrument for power quality monitoring in compliance with IEC 61000-4-30 and 61000-4-7 standards capable of granting good accuracy, satisfying repeatability, and cost effectiveness since the use in large scale monitoring is allowed. In this paper the attention is paid to the measurement algorithm to be adopted. The use of an alternative measurement approach with respect to the FFT one is proposed. Digital filters shaped on the harmonic group are thoroughly optimized for grouping measurements required by the IEC EN 61000-4-7 standard both in simulation and emulation environments. The obtained results confirm the advantages of the proposal.