Node admittance matrix direct listing method and device in compressed storage form

Abstract

The embodiment of the invention discloses a node admittance matrix direct listing and writing method and device in a compressed storage form, wherein the method comprises the steps: obtaining node information of a network node and branch information of a network branch, carrying out node numbering of the network node, and defining the column vector of a node admittance matrix in the compressed storage form; and defining and constructing a node number column vector of a target network node and an admittance column vector of a target network branch, and finally performing splicing column writingon the node number column vector and the admittance column vector based on the column vector of the node admittance matrix to obtain a direct column writing result of the node admittance matrix and enter a cycle. According to the method and device, the unnecessary calculation amount increased by calculation and storage of a large number of zero elements is reduced, and the problem that the load flow calculation efficiency is seriously influenced due to the fact that the time required for forming the node admittance matrix is long is solved. The generation time of the node admittance matrix issaved, and the occupied memory and hard disk storage space are greatly reduced.

Description

technical field [0001] The present application relates to the field of power systems, and in particular to a method and device for direct writing of node admittance matrices in the form of compressed storage. Background technique [0002] Power system power flow calculation is the basis for studying power system planning and analyzing safe operation. The node admittance matrix is ​​a necessary process of power flow calculation, and it is often used to reflect the parameters and line connections of the power network. The node admittance matrix is ​​a highly sparse matrix, and the number of elements with zero values ​​in the matrix is ​​much more than that of non-zero elements. number, and the distribution of non-zero elements is irregular. With the growth of power demand, the scale and topology of the power grid are becoming more and more complex, and the proportion of multi-circuit lines is increasing. The rapid and large-scale calculation of power system puts forward high...

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Problems solved by technology

[0004] In order to solve the problem that the calculation and storage of a large number of zero elements in the node admittance matrix increases the unnecessary calculation amount, and the formation of the node admittance matrix takes a long time, which seriously affects the efficiency of the power flow calculation. This application adopts the following implementations The example discloses a method and device for directly listing and writing node admittance matrix in the form of compressed storage

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