Authors : Ademola Abdulkareem, C.O.A. Awosope and A.U. Adoghe
Abstract: The literature is awash with different methods of loss estimation in transmission lines but in these approaches, there is a clear gap between the practical information and the theoretical one which tends to be poor and imprecise. Therefore, the need arises to develop a new approach of assessing the steady and transient value of technical losses on power lines for high degree of accuracy. The simulations of various aspects of asymmetrical faults were carried out at every bus of a three-phase power line to examine their effects on the voltage magnitude, line current and the maximum fault current in the test system. The test system is the existing 28 bus, 330 kV power system in Nigeria. A MATLAB program was written to efficiently and accurately perform the many calculations for the loss analysis of all the 28 faulted buses considered. This method captured the peak technical losses classified under the three categories of maximum line current, namely; low, medium and high current that are likened to the trio of steady-state, subtransient and transient currents. The corresponding power line losses obtained for low, medium and high current levels were 146.73, 322.24 and 738.28 MW, respectively.
Ademola Abdulkareem, C.O.A. Awosope and A.U. Adoghe, 2016. Power Line Technical Loss Evaluation Based Online Current from Unbalanced Faults. Research Journal of Applied Sciences, 11: 592-607.