Solution for frequency domain response of impedance discontinuity transmission line

A frequency domain response and transmission line technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of spectrum aliasing, computing memory and time consumption, etc., and achieve less computer resources, high computing efficiency, and application flexible effects

Inactive Publication Date: 2017-01-11
TIANJIN UNIV
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Problems solved by technology

[0007] The third method, Fast Fourier Transform (FFT), has a wide range of applications, but when performing time-frequency conversion, sufficient frequency sampling points must be selected within a certain frequency range to avoid spectral aliasing and cost Calculate memory and time
The above method can only analyze linear time-invariant circuits

Method used

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  • Solution for frequency domain response of impedance discontinuity transmission line
  • Solution for frequency domain response of impedance discontinuity transmission line
  • Solution for frequency domain response of impedance discontinuity transmission line

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, the present invention will be further described:

[0021] Assuming that the transmission line is a double-conductor transmission line, it includes n segments with discontinuous impedance, and the characteristic impedance of each segment is Z c1 ,Z c2 ,…,Z cn . Z 1 and Z 2 .

[0022] In the first step, combined with traveling wave theory, the voltage and current of the transmission line are decomposed into the sum of forward traveling wave and backward traveling wave, and the signal flow diagram is constructed, such as figure 1 shown.

[0023] Node 1 and node n+1 represent the power supply end and load end of the data transmission channel respectively, and nodes 2 to node n represent the connection points of each discrete uniform segment.

[0024] The second step is to solve the scattering parameters of each node. For nodes 1 and n+1, the scattering parameters are solved using the relationship between the incident wa...

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Abstract

The invention discloses a solution for frequency domain response of an impedance discontinuity transmission line. The solution is realized by the following steps: firstly, dividing an impedance discontinuity line into n impedance uniform segments, and establishing a signal flow graph according to a traveling-wave theory; secondly, solving a scattering coefficient of each node according to an electromagnetic topology theory, and then establishing a transmission relationship equation of waves according to a transmission theory of the waves; establishing a scattering equation of the waves according to the relationship between incident waves and reflected waves; finally, solving the frequency domain response of each node by the two simultaneous equations. Simulation verification of test software shows that the technical scheme is effective and reasonable for solving the frequency domain response of the impedance discontinuity transmission line.

Description

technical field [0001] The invention relates to the field of performance analysis of transmission lines, in particular to a solution scheme for frequency domain response of impedance discontinuous transmission lines. Background technique [0002] A transmission line is an electrical device that guides signals and energy and has a wide variety of applications. In the power system, the study of the characteristics of the line has important application value for the determination of the parameters of the relay protection components, fault distance measurement, lightning protection and so on. [0003] Numerical analysis methods for transmission lines can generally be divided into two categories: time domain methods and frequency domain methods. Among them, the frequency domain analysis method is to convert the transmission line equation into a partial differential equation in the frequency domain, and finally obtain the voltage and current frequency domain responses of the enti...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2113/16
Inventor 张如彬金杰
Owner TIANJIN UNIV
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