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Power flow calculation method based on Matlab sparse matrix Cartesian coordinate Newton method

A technique of Cartesian coordinates and power flow calculation, applied to AC network circuits, AC networks with the same frequency from different sources, circuit devices, etc., can solve problems such as slow calculation speed

Inactive Publication Date: 2019-10-29
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

This method is realized by Matlab, making full use of the characteristics of Matlab that is good at matrix operations and complex number operations, but does not use sparse matrix technology, the calculation speed is relatively slow, and the calculation speed still needs to be further improved

Method used

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  • Power flow calculation method based on Matlab sparse matrix Cartesian coordinate Newton method
  • Power flow calculation method based on Matlab sparse matrix Cartesian coordinate Newton method
  • Power flow calculation method based on Matlab sparse matrix Cartesian coordinate Newton method

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Embodiment Construction

[0171] Below in conjunction with accompanying drawing, the present invention is further described, according to Figure 3-4 The flow shown is calculated for a modified 445-node actual system example.

[0172]445 nodes The actual large-scale power system has 445 nodes and 544 branches, including a large number of small impedance branches. In order to compare various methods, these small impedance branches are changed to normal impedance branches to meet the requirements of various methods.

[0173] The calculation example of the 445-node actual system is calculated by using the present invention and the existing patented method, and the convergence accuracy is 0.00001 during calculation. The two power flow calculation methods are:

[0174] Method 1: The Chinese patent ZL201610864281.4 method does not use sparse matrix technology;

[0175] Method 2: the method of the present invention.

[0176] The calculation time of the power flow calculation of the two methods is shown in...

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Abstract

The present invention discloses a Matlab sparse matrix-based Cartesian coordinate Newton power flow calculation method. Matrix operation and complex operation are adopted, and a sparse matrix technique provided by the Matlab is used. The method of the invention is realized on the Matlab platform, so that scientific researchers can be facilitated to use various tools and functions provided by the Matlab to test and analyze calculation results; and the main part of the method of the invention adopts the matrix operation and complex operation, and therefore, program codes can be reduced, programming is simplified, a program is more clear, the scientific researchers can be facilitated to modify, debug and improve the program and add new features. The sparse matrix technique of the Matlab and the matrix operation are adopted, and therefore, calculation speed can be greatly improved; and the sparse matrix of the Matlab is very easy to use, and line and column numbers can be adopted to directly use the elements of the sparse matrix just as a full matrix, and an excellent analytical tool is provided for the scientific research work of the scientific researchers.

Description

technical field [0001] The invention relates to a power system Newton method power flow calculation method, in particular to a Cartesian coordinate Newton method power flow calculation method suitable for research purposes. Background technique [0002] Power system power flow calculation is a basic calculation for studying the steady-state operation of the power system. It determines the operating state of the entire network according to the given operating conditions and network structure. The power flow calculation is also the basis of other analysis of the power system, such as safety analysis, transient stability analysis, etc., all use power flow calculation. Cartesian coordinate Newton method power flow calculation method is the most commonly used power flow calculation method, and researchers often conduct further research on the basis of Cartesian coordinate Newton method power flow calculation. Practical commercial software is written in high-level programming lan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 姚玉斌赵伟吴志良王丹
Owner DALIAN MARITIME UNIVERSITY
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