Numerical Calculation Method of Electromagnetic Transients of High Voltage Transmission Lines Based on Dimensional Precise Integration

A technology for high-voltage transmission lines and electromagnetic transient computing, applied in computing, electrical digital data processing, special data processing applications, etc.

Inactive Publication Date: 2018-05-15
CHINA THREE GORGES UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, for high-voltage transmission lines, the discretized ordinary differential equations are usually non-homogeneous. If the precise integration method is directly used to solve the problem, it will involve the problem of matrix inversion, and this matrix inversion operation is not only computationally intensive, sometimes even is unstable

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  • Numerical Calculation Method of Electromagnetic Transients of High Voltage Transmission Lines Based on Dimensional Precise Integration
  • Numerical Calculation Method of Electromagnetic Transients of High Voltage Transmission Lines Based on Dimensional Precise Integration
  • Numerical Calculation Method of Electromagnetic Transients of High Voltage Transmission Lines Based on Dimensional Precise Integration

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Embodiment Construction

[0099] Embodiments of the present invention will be briefly described below with reference to the drawings.

[0100] as figure 1 The shown high-voltage power frequency uniform long transmission line is an example of the electromagnetic transient calculation of no-load closing under different initial phase angles. The specific implementation steps of the present invention can be summarized as follows:

[0101] 1) Discretize the space of the high-voltage transmission line, and establish a mathematical model for the corresponding electromagnetic transient numerical calculation

[0102] Enter the transmission line unit length parameter R 0 , L 0 、C 0 , line length L, voltage source function e(t) and its internal resistance R s ;

[0103] Spatial discretization: take N=20, divide the transmission line with L=300km into 20 segments evenly, expressed as figure 2 The space discretization form shown; the resistance, inductance and capacitance of each line after discretization ar...

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Abstract

The invention discloses an electromagnetic transient numerical computation method of a high-voltage transmission line based on increment dimension precise integration, comprising following steps: rewriting the input or excitation sine signal of the power transmission line as a state variable, converting a nonhomogeneous ordinary differential equation into a homogeneous ordinary differential equation through increment dimension of the state variable, wherein the nonhomogeneous ordinary differential equation describes the electromagnetic transient numerical computation of the high-voltage transmission line, and carrying out numerical integration computation to the homogeneous ordinary differential equation by a precise integration method. According to the invention, the advantage of high precision of the classic precise integration method is kept; therefore, the numerical vibration problem of the traditional electromagnetic transient numerical computation method is solved; compared with the existing electromagnetic transient numerical integration method, the electromagnetic transient numerical computation method of the high-voltage transmission line based on increment dimension precise integration is higher in computation efficiency.

Description

technical field [0001] The invention relates to an electromagnetic transient numerical calculation method of a power system, in particular to an electromagnetic transient numerical calculation method of a high-voltage transmission line based on a dimension-increasing fine integration method. Background technique [0002] High-voltage transmission lines are one of the important components of power systems. Analyzing the electromagnetic transient process of high-voltage transmission lines with numerical calculation methods can solve problems in many fields of power systems: it can simulate transmission line faults, obtain short-circuit currents and harmonic components, etc.; it can be used in the research of fault location algorithms for transmission lines And research on calculation of no-load closing overvoltage of transmission lines, etc. [0003] To sum up, the electromagnetic transient numerical calculation methods of high-voltage transmission lines roughly include two t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 汪芳宗杨萌
Owner CHINA THREE GORGES UNIV
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