VOLTAGE STABILITY INDICATOR AT THE PROXIMITY OF THE VOLTAGE COLLAPSE POINT AND ITS IMPLICATION ON MARGIN

Abstract

Maximum power transfer and optimal reactive power at voltage stability limit is the major problem. In power system, engineers faced with problem of variable load ranging from minimum to maximum at or near a constant value of voltage. A power system must be planned and operated in such a manner so as it gives good quality of reliable supply. Power system must be planned, designed installed and operated in such a manner so as to avoid voltage instability and voltage collapse. When the inductive load is increased the reactive power absorption is increased and hence voltage drop in transmission lines is increased and receiving end voltage is decreased. Voltage drop in transmission line depends upon the reactive power. Power transfer and receiving end voltage can be enhanced by using shunt compensation in order to increase the load. This paper looks in to a power flow program in MATLAB environment. Thus it is a graphical method to find out the magnitude of power transfer and receiving end voltage at steady state voltage stability limit and optimum value of power transfer and receiving voltage when the system is at stable state.