Abstract:

This paper presents an analytical method able to quantify the influence of the variation of active and reactive power of any point of a radial distribution system on the network voltage. Obviously, changing in a system parameters has an effect on the system performance. However, some may have significant impacts whereas others may have less important impacts. The main aim of this paper is to provide a study of the sensitivity of the network nodes voltage with respect to the variations of nodes powers, which can provides us some information about the influence of changing generation and load parameters on the system voltages. The results obtained may be very useful for choosing the otpimal placement of distributed generation and reactive sources, and also to control the voltage plan of a radial electric network, through the evaluation of the impacts of each actuator. A case study is presented, with an application of the proposed method on the IEEE 15-bus system, which provides immediate access to qualitative and quantitative information on node voltages sensitivity, with referred to the distributed generation emplacement, typical conductor sections used with underground cable lines and overhead lines.