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Rectangular coordinate Newton method load flow calculation method suitable for research purpose

A technology of Cartesian coordinates and power flow calculation, applied to AC networks with the same frequency from different sources, complex mathematical operations, AC network circuits, etc., can solve problems such as linear equations and solving functions that cannot be excellent in performance, and improve program stability. , simplify the corresponding relationship, and reduce the effect of programming difficulty

Pending Publication Date: 2022-05-31
DALIAN MARITIME UNIVERSITY
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Problems solved by technology

[0051] Although the method of Chinese patent CN201010509556.5 simplifies the corresponding relationship between the nodes and the rows and columns of the equation coefficient matrix, and greatly reduces the difficulty of programming, it requires special treatment when solving the correction equation for power flow calculation, and cannot use the excellent linear equation provided by the programming language solve function

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  • Rectangular coordinate Newton method load flow calculation method suitable for research purpose
  • Rectangular coordinate Newton method load flow calculation method suitable for research purpose
  • Rectangular coordinate Newton method load flow calculation method suitable for research purpose

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Embodiment Construction

[0129] The present invention will be further described below in conjunction with the accompanying drawings. according to figure 1 The flow chart of Cartesian coordinates Newton method power flow calculation shown and figure 2 The flow chart of the Jacobian matrix formation of the present invention is shown, and the power flow calculation is performed on an actual large-scale power grid. There are 445 nodes in the actual large-scale power grid, which contains a large number of small impedance branches. In order to make the conventional power flow calculation method also able to calculate, these small impedance branches are changed to normal branches. The convergence accuracy of the power flow calculation is 0.00001.

[0130] As a comparison, the following three methods are used to calculate the power flow of the actual large-scale power grid:

[0131] Conventional method: conventional Cartesian Newton method power flow calculation method;

[0132] Patent method: the method...

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Abstract

The invention discloses a rectangular coordinate Newton method load flow calculation method suitable for research purposes, and provides a Newton method load flow calculation method which is easy to modify and maintain for researchers performing further research on the basis of rectangular coordinate Newton method load flow calculation. For a power system with n nodes, node numbers are irrelevant to node types and can be numbered randomly, a Jacobian matrix in load flow calculation is stored according to (2n) * (2n), elements of rows and columns related to balance nodes are 0, but diagonal elements are not reset, and original calculation values are reserved. Therefore, a linear equation solving function with excellent performance provided by a programming language can be used for solving a correction equation for load flow calculation, the programming difficulty is reduced, the calculation speed is improved, and the reliability of the algorithm is ensured. Implementation examples show that a linear equation solving function provided by a programming language can be used for solving a correction equation of load flow calculation, the load flow calculation speed is increased, and the programming difficulty is reduced.

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 power system according to the given operating conditions and network structure of the power system. 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 moderate memory requirements, Newton's method has become the mainstream method for power flow calculation. Newton's method is divided into two forms: polar coordinates and rectangular coordinates. Both forms of Newt...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/06G06F17/12G06F17/16
CPCH02J3/06G06F17/12G06F17/16H02J2203/10H02J2203/20Y04S10/50
Inventor 姚玉斌蒋宝仪
Owner DALIAN MARITIME UNIVERSITY
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