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Matlab sparse matrix based power flow fast decomposition calculation method

A sparse matrix, power flow calculation technology, applied in the direction of AC network, AC network circuit, circuit device with different sources of the same frequency, can solve the problem of slow calculation speed and so on

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

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  • Matlab sparse matrix based power flow fast decomposition calculation method
  • Matlab sparse matrix based power flow fast decomposition calculation method
  • Matlab sparse matrix based power flow fast decomposition calculation method

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Embodiment Construction

[0141] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. according to Figure 3-4 The flow shown is calculated for a modified 445-node actual system example.

[0142] 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.

[0143] 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:

[0144] Method 1: The Chinese patent ZL201710056328.9 method does not use sparse matrix technology;

[0145] Method 2: the method of the present invention.

[0146] The calculation time of the power flow calculation of ...

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Abstract

The invention discloses a Matlab sparse matrix based power flow fast decomposition calculation method. The Matlab sparse matrix based power flow fast decomposition calculation method is realized at a Matlab platform by adopting the Matlab sparse matrix technology, so that a researcher can test and analyze a calculation result conveniently by using various tools and functions provided by the Matlab. As matrix operation and complex operation are adopted, program codes are reduced, the programming is simplified, the program becomes clearer, and convenience is brought for the researcher to modify the program, debug and improve the program and add new functions; and due to the use of the matrix operation, the calculation speed is also improved greatly. By adopting the Matlab sparse matrix technology in the Matlab sparse matrix based power flow fast decomposition calculation method, the calculation speed is greatly increased; meanwhile, the Matlab sparse matrix is very convenient to use, and the elements of the sparse matrix can be used directly like the row and column number of a full matrix, and design of a sparse storage structure is also unnecessary. The Matlab sparse matrix based power flow fast decomposition calculation method modifies the calculation process of an admittance matrix, and further improves the calculation speed.

Description

technical field [0001] The invention relates to a power system fast decomposition method power flow calculation method, in particular to a fast decomposition 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. Due to the advantages of reliable convergence, fast calculation speed, and less memory requirements, the fast decomposition method has become one of the mainstream methods for power flow calculations. Researchers often conduct further research on the basis of fast decomposition method power flow calculations. ...

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Application Information

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IPC IPC(8): H02J3/06
CPCH02J3/06H02J2203/20
Inventor 姚玉斌赵红朱景伟
Owner DALIAN MARITIME UNIVERSITY
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