Title :
The measurement and assessment of corona power losses on 400 kV transmission lines
Author :
Loxton, A.E. ; Britten, A.C.
Author_Institution :
TRAC Labs., South Africa
Abstract :
This paper presents the results of measurements of conductor corona losses on two open-circuited 400 kV transmission lines, one 85 km long and the other 143.2 km long. The results are compared with those obtained under test conditions in a local corona cage. From these it is shown that the loss predictions from the cage excitation functions (for the relevant conductors and conductor surface gradients) agree tolerably with the losses measured in both wet and dry conditions on the two lines. The overall errors and uncertainties in the CVT, CT and wattmeter measurements are also assessed.
Keywords :
corona; current transformers; electric current measurement; losses; potential transformers; power measurement; power overhead lines; voltage measurement; wattmeters; 143.2 km; 400 kV; 85 km; cage excitation functions; capacitor voltage transformers; conductor corona losses; conductor surface gradients; corona power losses; current transformers; dry conditions; local corona cage; loss predictions; open-circuited transmission lines; relevant conductors; transmission lines; wattmeter measurements; wet conditions; Conductors; Corona; Loss measurement; Phase measurement; Power measurement; Power transmission lines; Propagation losses; Rain; Transmission line measurements; Wattmeters;
Conference_Titel :
Africon Conference in Africa, 2002. IEEE AFRICON. 6th
Print_ISBN :
0-7803-7570-X
DOI :
10.1109/AFRCON.2002.1159980
