Correlation Of Load-Point Reliability Indices With Power System Fault Levels

ABSTRACT

Extensive literature abounds on the evaluating techniques of load-point reliability indices of electrical power systems. On the whole, all the efforts of the published works have been the establishment of conventional methods to evaluate load-point reliability indices from raw component reliability data. Any system change that warrants new set of load-point reliability indices would require the whole process of reliability evaluation to be repeated. That is an inherent characteristic of these conventional evaluation techniques. For consistent and proper system operation and monitoring the effects which any changes (such as addition of new lines, transformers or shunt reactors or their removals in order to -cater for changes in the load demands) in the system have on the various load-point reliability indices, must be adequately assessed. In effect, this means that a new set of load-point reliability indices ri 11 have to be evaluated for the modified system in order to get the true picture of the system performance at the load points. Thus, repeated reliability indices evaluation can not be avoided in a successful system operation.