Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Przegląd Elektrotechniczny

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: power quality monitor

Sortuj według:

Ogranicz wyniki do:

Alternative methodology to evaluate the performance of PQ monitors

Sañudo A., Filho A. L. F.

Przegląd Elektrotechniczny

2016

R. 92, nr 5

17--25

This paper presents an alternative methodology for evaluating the functional perfomance of electric power quality measurement instruments, which is elaborated based on the results of the application in laboratory of three procedures found in documents that deal with this subject. It is a proposal which includes the metrological and technical aspects of each electric power quality parameters required by IEC 61000-4-30 through the use of ISO-GUM. From the implementation of this methodology, it is possible to identify the attributes and deficiencies of the instrument under evaluation and show them in a report that expresses its performance.

W artykule zaprezentowano metodologię oceny metod pomiaru jakości energii. Uwzględniono parametry rekomendowane przez normę IEC 61000-4-30 oraz zalecenia ISO-GUM. Metodologia pozwala na ocenę wad i zalet poszczególnych metod.

A New Approach for Optimal Power Quality Monitor Placement in Power System Considering System Topology

Ibrahim A.A., Mohamed A., Shareef H., Ghoshal S.P.

Przegląd Elektrotechniczny

2012

R. 88, nr 9a

272-276

Nowadays, most of the equipment used in the industries are mainly based on semiconductor devices and microprocessors and hence these devices are very sensitive to voltage disturbances. Among power disturbances, voltage sags are considered as the most frequent types of disturbances in the field and their impact on sensitive loads is severe. However, to assess voltage sags, installation of power quality monitors (PQM) at all system buses is not economical. Thus, this study is carried out to develop a power quality monitor positioning algorithm to find the optimal number and placement of PQMs in both transmission and distribution systems. In this proposed approach, first, the concept of topological monitor reach area is introduced. Then the genetic algorithm is used in finding the optimal number of PQMs. Finally, to optimally place the identified number of PQMs, all possible combinations of those PQMs in the power system are evaluated using two novel indices namely, monitor overlapping index and sag severity index. The proposed algorithm has been implemented and tested on the IEEE 30-bus and the IEEE 34-node test systems to show effectiveness of the proposed method to both transmission and distribution systems.

W artykule zaprezentowano nowy algorytm oceny jakości energii mający na celu optymalizację rozmieszczenia monitorów. Do tego celu wykorzystano algorytm genetyczny. Wykorzystywane są dwa współczynniki – wzrostu napięcia i zapadu napięcia.