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Modelowanie rozkładu wskaźników hałasu ulotu w otoczeniu linii wysokiego napięcia

Wszołek T.

Przegląd Elektrotechniczny

2010

R. 86, nr 11b

111-114

W pracy pokazano model do obliczania poziomu mocy akustycznej jednostkowej długości przewodów fazowych w funkcji intensywności opadów, stanu technicznego oraz wysokości zawieszenia przewodów dla dowolnego układu geometrycznego linii WN. Przykładowe obliczenia rozkładu wskaźników długookresowych hałasu ulotu przeprowadzono w przekrojach poprzecznych oraz w postaci mapowej dla zróżnicowanych uwarunkowaniach terenowych.

The paper shows a model to calculate the sound power level of unit length phase conductors as a function of rainfall intensity, the technical condition and the height of the suspended conductors for any geometric arrangement of power line. Sample calculations of the distribution of the long-term noise indicators were performed in cross sections and the form of maps in diverse terrain considerations.

Assessment of utility of the corona audible signal in the diagnostic process of the technical condition of UHV transmission lines

Wszołek T.

Archives of Acoustics

2004

Vol. 29, no. 2

297-308

The paper deals with application of neural network techniques to recognition of typical damages of the transmission circuit elements in UHV power lines. The damage indicator is the acoustic signal generated by the corona effect, the intensity of which increases as a result of damage or contamination of the conductor surface. The primary difficulty in the diagnostic process is the necessity to distinguish between the signals generated by the surface damages and contaminations. The problem can not be solved neither by the analysis of RF interference signal nor by the classical methods of the acoustic signal analysis. Particular attention has been focused on the parametrization of the acoustic signal of corona effect and selection of distinctive features, which could be useful in distinguishment of the origins of the increased corona effect in dry conductor surface conditions. For that task the aggregation analysis has been applied, in particular the possibilities offered by "Statistica"Ž software package. The data used in the analysis has been obtained from laboratory studies in Institute of Power Engineering in Warsaw, where typical surface damages and contaminations of the transmission line elements have been simulated.