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当前位置: 首页 > 文章 > 农电网中提高分支系数计算速度的算法研究 农机化研究 2011,33 (6) 221-223+227
Position: Home > Articles > Increasing the Speed for Calculating Branched Coefficients in Rural Power System Journal of Agricultural Mechanization Research 2011,33 (6) 221-223+227

农电网中提高分支系数计算速度的算法研究

作  者：
许兴磊;霍利民
单  位：
河北农业大学机电工程学院
关键词：
农网;分支系数;矩阵修改;矩阵求逆
摘  要：
在编写针对农网电力系统整定计算的软件中,计算分支系数的常用方法仍然是枚举所有可能的运行方式筛选出最大和最小分支系数。为了提高分支系数的计算速度,根据线路检修时导致电网两节点间断开,并且农网电力线路辐射结构比较多的特点,检修时不采用中间填补一个值—非常小的导纳来修改导纳矩阵,而是直接将与求取分支系数支路无关的那些节点删除掉,对导纳矩阵进行矩阵的删除修改。导纳矩阵的删除修改使得矩阵的阶数降低,从而提高矩阵求逆的计算速度。实际算例计算表明,此方法可大大提高分支系数的计算速度。
译  名：
Increasing the Speed for Calculating Branched Coefficients in Rural Power System
作  者：
Xu Xinglei,Huo Limin(College of Electrical and Engineering,Agricultural University of Hebei,Baoding 071001,China)
关键词：
rural power system;branched coefficients;matrix modification;matrix inversion
摘  要：
When making software of protection relay setting in connection with rural power system,the common method of calculating branched coefficients is also enumerating all of the possible operation mode to select the maximum and minimum branched coefficients.In order to improve the calculation speed of branched coefficients,there are too many radiated structure in the rural power system and the maintenance of power line and the transformer with topologic Y connection on the condition of the zero-sequence current cause disconnection between two nodes,in this case not to fill a very small admittance for modifying matrix but delete the nodes which are unrelated with the line for calculating branched coefficients directly,that cause deleting the matrix for modification.The deleting modification of the matrix makes the rank of the matrix lower,and improves the speed of the calculating.It proved to be a marked improvement on speed of branched coefficients calculation by a numerical example.

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