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Power flow calculation method and system based on electrothermal coupling effect of transmission lines

A transmission line and electrothermal coupling technology, which is applied in the power flow calculation method and system field based on the electrothermal coupling effect of transmission lines, can solve calculation errors and other problems, and achieve the effects of avoiding calculation, reducing calculation time, and improving calculation efficiency

Active Publication Date: 2020-08-25
TSINGHUA UNIV
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Problems solved by technology

[0006] For this reason, an object of the present invention is to propose a power flow calculation method based on the electrothermal coupling effect of transmission lines, which solves the problem of calculation errors caused by ignoring the electrothermal coupling effects of transmission lines in conventional power flow calculations

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  • Power flow calculation method and system based on electrothermal coupling effect of transmission lines
  • Power flow calculation method and system based on electrothermal coupling effect of transmission lines
  • Power flow calculation method and system based on electrothermal coupling effect of transmission lines

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Embodiment Construction

[0107] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0108] According to related technologies, it is necessary to propose a power flow calculation method that considers the electrothermal coupling effect of transmission lines with high calculation efficiency on the basis of conventional power flow calculations to improve the accuracy of power flow calculations. Some concepts involved in the embodiments are introduced below.

[0109] 1) Power flow calculation: Power flow calculation is the calculation of determining the steady-state operating state parameters of the power system bas...

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Abstract

The invention discloses a power flow calculation method and system based on an electro-thermal coupling effect of a transmission line. The method comprises the steps of acquiring meteorological information and information of all branches and nodes in an electric power system, and setting initial values of the voltage amplitude and phase angle of each node to be calculated and the resistance of each transmission line in the power flow calculation; calculating an active node admittance matrix and a reactive node admittance matrix of the electric power system according to the information of allbranches and nodes in the electric power system; correcting the node injection active power, and iteratively calculating the voltage phase angle of a non-reference node; correcting the node injectionreactive power, and iteratively calculating the voltage amplitude of a PQ node; iteratively calculating the resistance of the transmission line according to the meteorological condition; and judging whether a convergence condition is satisfied or not. The method solves a problem of calculation errors generated by neglecting the electro-thermal coupling effect of the transmission line in the conventional power flow calculation, and improves the calculation efficiency.

Description

technical field [0001] The invention relates to the technical field of power system analysis, in particular to a power flow calculation method and system based on the electrothermal coupling effect of transmission lines. Background technique [0002] Power flow calculation is the calculation of determining the steady-state operating state parameters of the power system based on the network topology, component parameters, and boundary conditions that determine the operating state of the power system. Power flow calculation is a very important analysis and calculation in power system, and it is the basis of power system planning, operation, optimization, safety, reliability and transient analysis. [0003] In conventional power flow calculations, the resistance of transmission lines is usually regarded as a constant. But in reality, the resistance of a transmission line is linearly related to the temperature of its conductor. Moreover, the conductor temperature of the transm...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/06
CPCH02J3/06
Inventor 陈启鑫李寅晓王毅康重庆夏清
Owner TSINGHUA UNIV
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