Illustration of the voltage stability by using the slope of the tangent vector component

This Paper is dedicated to the analysis of evolution tangent vector during Continuous Power Flow (CPF) iterations. The flow slope (measured in degrees) shown through coefficient lambda component and maximum voltage component. A 17 Node Network was used for purposes this Paper. system modelled MATLAB software. admittance matrix node equations formulated functions were developed systematic formation matrix. Equations calculated network generated MATLAB. 32 Iterations performed. corrections iterations done manually. Firstly, results vectors CPF program compared tangents directly with mathematical formula tangent, both match. chart, which contains classical PV curve iterations, based on obtained. increase diagram imposes a clear numerical stability limit by specifying an angle value, can be trigger alarm. In addition classic Power-Voltage (PV) curve, serves as additional indicator ensuring examined system.