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A cold-start linearized optimal power flow calculation method capable of calculating complete power flow information

A technology of optimal power flow and calculation method, which is applied in the direction of AC networks with the same frequency from different sources, and can solve problems such as poor accuracy and poor applicability

Active Publication Date: 2020-08-25
HOHAI UNIV
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  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: The present invention proposes a cold-start linearized optimal power flow calculation method capable of calculating complete power flow information to solve the problem of poor precision in the field of power system analysis and calculation of Direct Current Optimal Power Flow (DCOPF) , poor applicability

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  • A cold-start linearized optimal power flow calculation method capable of calculating complete power flow information
  • A cold-start linearized optimal power flow calculation method capable of calculating complete power flow information
  • A cold-start linearized optimal power flow calculation method capable of calculating complete power flow information

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Embodiment Construction

[0066] The implementation process of the above-mentioned cold start linearized optimal power flow calculation method that can calculate complete power flow information is as follows:

[0067] (1) Obtain the bus number, name, active load, reactive load, parallel compensation capacitor of the power system, the branch number of the transmission line, the number of the first end node and the end node, series impedance, parallel admittance, transformer ratio and impedance , network parameter information such as the upper and lower limits of generator active output and reactive output, generator coal-fired economic parameters, etc.;

[0068] (2) Program initialization;

[0069] (3) Calculate the complementary gap Gap, and judge whether it satisfies the precision requirement, that is, whether it is less than the convergence precision ε, and if so, output the optimal solution and end the loop, otherwise, continue;

[0070] (4) Establish the optimal power flow mathematical model as fo...

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Abstract

The invention discloses a cold start linearization optimal power flow calculation method capable of calculating the complete power flow information. The method comprises steps that through establishing a cold start linearization optimal power flow calculation model, an original non-linearization optimal power flow calculation model is converted into a cold start linearization calculation model through decoupling and substitution, and all the power flow information can be solved on the condition that calculation efficiency is guaranteed. The method is advantaged in that DC optimal power flow efficiency is kept, higher precision is realized, and strong adaptability is realized.

Description

technical field [0001] The invention relates to an optimal power flow calculation method, in particular to a cold-start linearized optimal power flow calculation method capable of calculating complete power flow information. Background technique [0002] With the continuous increase of power grid load and the increasingly complex operation characteristics of the power grid, the online calculation and analysis of the power system has become more and more important in the operation and control of the power grid. Optimal Power Flow (OPF) calculation of power system adopts AC model. The AC model is a typical nonlinear model with high calculation accuracy and can completely reflect the real situation of the system. However, due to the nonlinear characteristics of the AC model, its calculation scale and difficulty will continue to increase with the increase of the grid scale, so the solution efficiency will become lower, and even non-convergence may occur, which will be difficult...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
Inventor 卫志农张清松孙国强臧海祥何天雨
Owner HOHAI UNIV