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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Although these technologies can greatly increase the speed of power flow calculation and

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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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[0098] The present invention will be further described below in conjunction with the drawings. Attached figure 2 And image 3 Where ε is a given small positive number, which is used to judge whether the floating point number is 0. In the calculation 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. There are 5 buses (nodes) in total, among which bus 1 is the PV node, the active power and voltage amplitude of this bus are given, bus 2 is the balance node, the voltage amplitude and phase angle of this bus are given, and the other 3 buses are PQ node, the active power and reactive power of these buses are given. The branch parameters are shown in Table 1, and the bus data is shown in Table 2. The unit in the table is the unit value.

[0100] Table 1 attached Figure 4 Branch parameters of the em...

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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...

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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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