A Cartesian Coordinate Newton Method Power Flow Calculation Method Based on Matlab

Abstract

The invention discloses a Matlab-based rectangular coordinate newton power flow calculation method. Matrix operation and complex operation are adopted, a Jacobi matrix is formed according to the programming characteristic of Matlab, and the power of a node is calculated. The method comprises the following steps: calculating an initial Jacobi calculation matrix; calculating the complex power and the injection current phasor of the node; calculating partitioned sub-matrixes of the initial Jacobi matrix; correcting diagonal elements of the sub-matrixes of the Jacobi matrix by virtue of the injection current phasor of the node and a partial derivative of a voltage deviation to a voltage; forming the Jacobi matrix by virtue of the sub-matrixes of the Jacobi matrix, and performing regulation. The method is implemented on a Matlab platform, so that a researcher can conveniently test and analyze a calculation result by virtue of various tools and functions provided by Matlab. Practices show that convenience is brought to program compiling, modification and debugging of the researcher, the calculation speed is substantially approximate to the speed achieved on a C language platform and an excellent analysis tool is provided for the researcher.

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 employs advanced techniques such as spar...

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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 programming language such as Matlab. At the same time, this patent does not make full use of the characteristics of Matlab that is good at matrix operations and complex number operations.

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