广义快速分解潮流计算方法

快速分解潮流(FDLF)算法在当今的国内外电网调度控制中心和规划部门得到了广泛应用。在大部分情况下FDLF算法具有很高的计算效率,但对于高阻抗比的输电网和配电网,FDLF法的数学基础不再成立,其收敛性和计算效率均变差,因而FDLF无法适用于高阻抗比的输电网和配电网。针对以上问题,文中通过对节点注入有功功率/无功功率进行变换,进而得到类有功注入功率/类无功注入功率,两者具有更好的解耦特性,且这种解耦特性与阻抗比的值无关;在此基础上提出一种广义快速分解潮流(GFDLF)算法。GFDLF算法只需基于一个前提条件,而传统的FDLF算法则需要3个前提条件,因此GFDLF算法对输电网和配电网(包括高阻抗比网络)均具有良好的适应性。算例仿真验证了所提方法具有良好的收敛性和较高的计算效率。

Generalized Fast Decoupled Load Flow Algorithm

Fast decoupled load flow(FDLF)algorithm has been widely used in the domestic and international power dispatch and control center and planning department. The FDLF algorithm usually has very high computational efficiency. But for the transmission networks and distribution networks with high resistance-to-reactance ratios, the mathematical basis of the FDLF algorithm is no longer satisfied, and its convergence and computational efficiency are poor. So the FDLF algorithm cannot be applied to the transmission networks and distribution networks with high resistance-to-reactance ratios. The above problem is addressed by transforming active/reactive power at buses so that they can be classified as quasi active/reactive power at buses, which have better decoupling characteristics. And this decoupling property is independent of the value of resistance-to-reactance ratio. On this basis, a generalized fast decoupled load flow(GFDLF)algorithm is proposed. The GFDLF algorithm is based on only one assumption, rather than three assumptions used in the conventional FDLF algorithm. As a result, the GFDLF algorithm has good adaptability to both power transmission network and distribution network(including the network with high resistance-to-reactance ratio). Simulation results show the effectiveness and efficiency of the proposed method.