Rapid decomposition method trend calculating method based on Matlab

A technology of power flow calculation and decomposition method, which is applied to AC networks, AC network circuits, and circuit devices of the same frequency with different sources.

Inactive Publication Date: 2017-04-26
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

This method is very fast when implemented in a compiled programming language such as C language, but the calculation speed is very slow when implemented in an interpreted prog

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  • Rapid decomposition method trend calculating method based on Matlab
  • Rapid decomposition method trend calculating method based on Matlab
  • Rapid decomposition method trend calculating method based on Matlab

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Embodiment Construction

[0136] Below in conjunction with accompanying drawing, the present invention is further described, according to Figure 2-3 The flow shown is calculated for a modified 445-node actual system example.

[0137] 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.

[0138] The calculation example of the 445-node actual system is calculated by using the present invention and several comparison methods, and the convergence precision is 0.00001 during the calculation. Several power flow calculation methods are:

[0139] Method 1: The Chinese patent 201010585176.X method is implemented by Matlab language.

[0140] Method 2: The Chinese patent 201010585176.X method is implemented by using Matlab language. When calculating the node power, it is judged wh...

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Abstract

The invention discloses a rapid decomposition method trend calculating method based on a Matlab. The method comprises the following steps that matrix operation and complex number operation are used; an array bt1 is set and a node number of a non-equilibrium node is recorded, and an array bt2 is set and a node number of a PQ node is recorded; when equation set coefficient matrixes B' and B'' are formed, a node type is not considered, and then according to the arrays bt1 and bt2, a matrix element is extracted, and redundant rows and columns are removed; and before iteration, according to the arrays bt1 and bt2, node-injected active and reactive independent elements are removed. In the invention, program codes are reduced, programming is simplified, and a program is clear so that scientific research personnel can conveniently modify the program, debug and improve the program, and add a new function. In the invention, during LU decomposition, an independent element of a coefficient matrix is removed, and before iteration, node-injected active and reactive independent elements are removed; and during an iteration process, work of mentioning a correlation matrix or a vector element repeatedly can be avoided, calculating workloads are reduced and a calculating speed is increased.

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 姚玉斌朱景伟
Owner DALIAN MARITIME UNIVERSITY
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