1994 Volume 114 Issue 11 Pages 1126-1134
It is desireble for the power system planner to understand the voltage characteristics of power system without computational burden or with a munimum number of load flow calculations and dynamic simulations. The authors have been studying the voltage stability problem by means of voltage sensitivity, which can be easily obtained in the load flow calculation.
First, this paper proposes a voltage sensitivity map which can visualize the characteristics of the power system from the viewpoint of voltage stability. The planner can easily identify the weak busses from the viewpoint of voltage stability by the map.
Second, the paper clarifies the mechanism of the improvement of voltage stability by various apparatus such as shunt capacitor and Static Var Compensator (SVC) using the voltage sensitivity. The paper demonstrates that the effective location of such apparatus to improve the voltage stability can be found by the help of the voltage sensitivity.