广义潮流计算

Generalized Power Flow

本文研究了广义潮流算法。该算法将各种类型的节点引入潮流计算,并将线路的有功功率给定及无功功率给定作为潮流平衡方程。进而研究了广义牛顿一拉夫逊潮流算法及广义快速分解潮流算法,对IEEE14节点及30节点系统进行了计算,得到了较好的结果。

Generalized Newton-Raphson and Generalized fast decoupled power flow methods are presented in this paper. There are four variables at a bus, P,Q,V,0. In common power flow calculation, two of the bus variables are control variables, and there are only three types of buses, that is, PQ bus, PV bus and slack bus. But in generalized power flow calculation, control variables of a bus can be any combinations of the four bus variables P>Q>V,θ, so the types of buses are generalized, the number of possible combinations of the four bus variables is fifteen, and a bus at which none of the tour bus variables is control variable is also a type of bus, so the total number of bus types is sixteen. And in generalized power flow calculation, real and/or reactive power flows of-transmission lines can be set to be control variables, that is, real and/or reactive power flows of some lines can be specified, and the specified line real and/or reactive power flows are used as power flow equilibrium equations. Generalized Newton-Raphson and generalized fast decoupled power flow methods are developed upon the above principles. The solvability of generalized power flow calculation is also studied. Numerical results on IEEE 14-bus and IEEE 30-bus systems are given.