Improvement of the Power Transmission of Distribution Feeders by Fixed Capacitor Banks

The aim of this paper is the presentation of a new analytical formulation of the reactive energy compensation on distribution lines, which are characterised by their radial configuration. It will be devoted to the determination of the sizes and locations of a given number of fixed capacitor banks placed on a non-homogeneous radial line with a non- constant voltage. For the network solution, it is required to know the voltage at each node and at the capacitors location. On the basis of what has been just said and due to the radial type of the line, an iterative method called voltage drop method will be applied. The voltage rms values and phase-angles at all the nodes and on the capacitor banks will be calculated. The mathematical models of the current distributions are made considering the line active and reactive power losses. In the reactive energy optimisation process and for the power and energy loss reductions, we have used new models. The latter take into account the effect of all the capacitors in the calculation of the loss reductions due to a particular one. The results obtained then, are compared to those of authors having previously worked on the subject.