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Newton-process power flow calculation method for study purpose

A technology for power flow calculation and purpose, applied in the direction of calculation, AC network circuit, special data processing application, etc., can solve the problems of difficult modification and maintenance, programming trouble, etc., and achieve the effect of easy modification and maintenance.

Inactive Publication Date: 2011-02-16
DALIAN MARITIME UNIVERSITY
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AI Technical Summary

Problems solved by technology

Although these technologies can greatly increase the speed of power flow calculation and reduce memory usage, programming is very cumbersome and difficult to modify and maintain

Method used

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  • Newton-process power flow calculation method for study purpose
  • Newton-process power flow calculation method for study purpose
  • Newton-process power flow calculation method for study purpose

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Embodiment Construction

[0098] The present invention will be further described below in conjunction with accompanying drawing. attached figure 2 And attached image 3 Among them, ε is a given small positive number, which is used to judge whether the floating point number is 0. In the example of the present invention, ε=10 -20 , Figure 4 The middle number is the bus number.

[0099] attached Figure 4 It is a simple power system network, including 2 generators, 3 loads, 2 transformer branches, and 2 transmission lines. A total of 5 busbars (nodes), among which busbar 1 is a PV node, the active power and voltage amplitude of this busbar are given, busbar 2 is a balance node, the voltage amplitude and phase angle of this busbar are given, and the other 3 busbars are PQ nodes, active and reactive power references for these buses. See Table 1 for branch parameters and Table 2 for bus data, and the unit in the table is per unit.

[0100] Table 1 attached Figure 4 Example branch parameters

[01...

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Abstract

The invention discloses a Newton-process power flow calculation method for study purpose and provides a Newton-process power flow calculation method which is easy to correct and maintain for research personnel conducting further researches on the basis of Newton-process power flow calculation. Adopting the basic principle steps of a polar coordinate Newton method, the invention provides a method for improving the speed of power flow calculation by avoiding unnecessary calculation through simple logic judgment on the basis of the analysis of the components of the power flow calculation. In thetechnical scheme of the invention, unnecessary calculation is avoided by making simple judgment in a Jacobimatrix forming module and a correction equation Gaussian elimination module. When the methodis used for performing calculation on a 445 node actual large-size grid, the calculation time is 0.484s, and the calculation speed can meet requirements for scientific research completely.

Description

technical field [0001] The invention relates to a Newton method power flow calculation method in a power system, in particular to a Newton method power flow calculation method suitable for research purposes. Background technique [0002] Power flow calculation is the most basic calculation in power system, and it is also the basis of other power system analysis (such as static security analysis, etc.). The Newton method power flow calculation algorithm is the most commonly used power flow calculation method, and researchers often conduct further research based on the Newton method power flow calculation. Practical algorithms employ advanced techniques such as sparse matrix techniques and optimized numbering of nodes. Although these technologies can greatly increase the speed of power flow calculation and reduce memory usage, programming is very cumbersome and difficult to modify and maintain. For research purposes, there is an urgent need for a Newton's method power flow c...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06F19/00
Inventor 姚玉斌赵红王莹顾本华
Owner DALIAN MARITIME UNIVERSITY
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