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Polar coordinate Newton method load flow calculation method based on Matlab sparse matrix

A technology of power flow calculation and sparse matrix, applied in calculation, design optimization/simulation, special data processing applications, etc., can solve problems such as slow calculation speed

Inactive Publication Date: 2017-09-22
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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  • Polar coordinate Newton method load flow calculation method based on Matlab sparse matrix
  • Polar coordinate Newton method load flow calculation method based on Matlab sparse matrix
  • Polar coordinate Newton method load flow calculation method based on Matlab sparse matrix

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Embodiment Construction

[0146] 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.

[0147] 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.

[0148] 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:

[0149] Method 1: The Chinese patent ZL201610863886.1 method does not use sparse matrix technology;

[0150] Method 2: the method of the present invention.

[0151] The calculation time of the power flow calculation of the two methods is shown i...

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Abstract

The invention discloses a polar coordinate Newton method load flow calculation method based on a Matlab sparse matrix, adopting matrix operation and complex operation and using a sparse matrix technology provided by Matlab. The method is implemented on a Matlab platform, so that researchers are facilitated to use various tools and functions provided by Matlab to test and analyze a calculation method. The main part of the method adopts both the matrix operation and the complex operation, reduces program codes and simplifies a programming process, so that the program is clearer, and the researchers are facilitated to modify the program, debug the program, and improve and add new functions for the program. The method provided by the invention adopts the sparse matrix technology of Matlab, so that calculation speed is greatly improved, meanwhile the sparse matrix of Matlab is very convenient to use, elements of the sparse matrix can be directly used by using a column number like a full matrix, design of a sparse storage structure is not needed, and an excellent analysis tool is provided for scientific research of the researchers.

Description

technical field [0001] The invention relates to a power system Newton method power flow calculation method, in particular to a polar 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. Polar 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 polar coordinate Newton method power flow calculation. Practical commercial software is written in high-level programming languages ​​suc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20Y02E60/00
Inventor 姚玉斌赵伟王丹吴志良
Owner DALIAN MARITIME UNIVERSITY
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