Active power flow adjustment based on sensitivity analysis of DC load flow model

Power flow adjustment is absolutely significant and widely used in grid operation mode arrangement, static safety analysis, safety corrective control, and the transmission congestion management. According to the needs of active power control and adjustment, new and effective methods should be developed and used to alleviate the overloaded branches and tie line groups. A practical active power flow adjusting method based on the sensitivity analysis of DC load flow model is presented in this paper. In the proposed algorithm, firstly, DC load flow is used to calculate branch active power flow sensitivity with respect to the generator node active power injection. Further, the method of RAEM (reverse and equivalent match) is used to adjusting the value of generator node active power, and to avoid the involvement of balance machine. Simulative calculation of standard IEEE-30 test system proves that this approach is fast, practical, and robust.