Optimal operation and allocation of reactive power resource considering static voltage stability

In this paper, new formulation of the reactive power equipment operation and planning problem in the power system has been proposed for providing maximum active power supply margin (transmission margin) as viewed from static voltage stability, while satisfying various system operation constraints. While clarifying the fact that the problem related to reactive power operating and planning problems are rooted in the load flow optimization, a new optimal power flow problem for solving such problems has been introduced. Also, an algorithm based on the successive quadratic programming method has been developed. Furthermore, taking the optimal allocation problem relative to reactive power equipment as an example, its effectiveness in the 5-bus and 11-bus systems has been confirmed