Assessment of the Static Stability Margin and Voltage Profile Improvement in the SOUTH-SNEL PowerNetwork using a SVC under MATLAB / PSAT Environment

Abstract

The huge increase in the demand of electric power and the economic constraints to build new facilities, lead the power systems to operate near of their stability limits. Indeed, instability has become a major problem in the management of power systems. Unavoidable disturbances such as short circuits, momentary unavailability of transmission lines, generators as well as transformers can affect the stability of the power system at any time and bring it into a state of instability or collapse. These collapses become a major problem for energy consumers, because the lack of energy leads them to use backup energy sources that are relatively expensive and polluting. This situation lowers the productivity of the industry, and for the national electric company of the Congo, (SNEL), the time to get rid of the magnetization of the network and to take all the loads, can generate penalties, which is a loss of revenue for the company. This paper aims to assess the stability margin and to improve the quality of electrical energy in the south-SNEL transmission system.