The Optimization Of The Reactive Power Flow In Power System Based On Interior Point Cutting Plane Method

Reactive power optimization in power systems is a complex mixed-integer nonlinear programming problem that contains a large number of integer variables and continuous variables, to ensure the quality and speed of solving are the difficulties of these problems. In this paper, the initial network optimization is the total power losses and the control variables include switch reactive power compensate capacity,generator bus voltages and transformer tap positions. The interior point cutting plane method is used to solve this problem. This algorithm runs the following steps:(1) linearizing the Reactive power optimization model, solving the problem in interior point method and getting the Second-best solutions;(2) identifying the basis variables in the Second-best solutions and generating mixed integer cutting plane relied on these basis variables;(3) Repeatedly running the above steps until meeting the conditions of the solutions.In this paper, the above-mentioned method is derived, the amount of iterative calculation is small and it can consider all factors affecting reactive power flow such as generator terminal voltage, output of reactive power sources and transformer tap positions. Reactive power optimization of IEEE standard testing systems verifies the validity of the method.