广东电力Issue(9)：50-55,6.DOI:10.3969/j.issn.1007-290X.2015.09.010
基于稀疏矩阵变换的电网故障电流快速算法
Fast Algorithm for Power Grid Faulted Current Based on Sparse Matrix Transform
摘要
Abstract
Combining sparse matrix low rank update algorithm and low rank decomposition theory,a kind of fast algorithm for power grid faulted current was proposed.Firstly,change of network structure caused by fault was shown by modified ad-mittance matrix after phase-sequence transformation.Then,according to non-negative matrix decomposition principle,the modified admittance matrix was transformed to form of product of two low rank matrix.Finally,the formed factor table and low rank update algorithm was used to realized fast calculation on network current after the fault.The new algorithm fully used sparse characteristic of admittance matrix of electric power network nodes to deal with low rank decomposition which greatly reduced calculated amount for equivalent impedence and improved calculation speed for short circuit current. IEEE-14 node system,IEEE-30 node system,IEEE-1 1 8 node system and IEEE-1047 node system was respectively used for testing the new algorithm and compared results of the new algorithm with those of traditional modified admittance matrix methods.Results indicates that calculation precision of the new method could satisfy engineering requirements which is of obvious advantage in calculation speed for large scale system.关键词
稀疏矩阵/低阶更新/低秩分解/修改导纳/故障电流Key words
sparse matrix/low rank update/low rank decomposition/modified admittance/faulted current分类
信息技术与安全科学引用本文复制引用
陈志光,范幸,李一泉,朱峥,邱建,黄明辉..基于稀疏矩阵变换的电网故障电流快速算法[J].广东电力,2015,(9):50-55,6.基金项目
国家自然科学基金资助项目(61233008) （61233008）
广东电网有限责任公司科技项目(K-GD2014-099) （K-GD2014-099）
