电力系统潮流算法的几点改进

对电力系统传统潮流算法进行了如下几点改进：①提出了基于诺顿等值的多平衡节点处理方法。该方法既能解算具有多个平衡平点的同一电网潮流问题。也能够同时解算相互解列的、各自内部具有多个平衡节点的不同子网潮流问题。②针对小阻抗和零阻抗网络参数易导致节点导纳矩阵病态并影响潮流收敛速度和精度的同时，提出了基于节点等效附加注入的小阻抗和零阻抗处理方法。该方法可使节点导纳矩阵良性化，从而保证算法快速、准确地收敛。③针对PQ分解法的收剑性敏感于R/X比的问题，提出了基于节点等效附加注入的改进PQ分解法，使适用于高压输电系统的PQ分解法能够成功地应用于具有大R/X比的低压配电网潮流解算中。

IMPROVEMENTS ON USUAL LOAD FLOW ALGORITHMS OF POWER SYSTEM

This paper makes several improvements on usual load flow algorithms of power system. The first improvement is that this paper presents a treatment method of multi swing buses based on the Norton equivalence. The method can not only be used to calculate single network's load flow with multi swing buses in it, but also be used to calculate several different networks' load flow with multi swing buses in each network. The second improvement is that this paper presents a treatment method of small and zero impedance lines based on the bus equivalent additional injections of these lines. The method can make the bus admittance matrix be benign, which guarantees high speed and accuracy of algorithm. The third improvement is that this paper presents an adapted PQ de coupled load flow algorithm, which solves the problem of usual method's astringency sensitivity to great R/X ration of line parameters. The method can not only be used to transmission systems, but also be used to distribution systems.