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Dynamo-electric transient simulation method and system of half-wavelength line

A transient simulation, half-wavelength technology, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as deviation

Inactive Publication Date: 2018-03-23
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

If the transition process is ignored, and the model in which the electrical quantity reaches a steady state instantaneously is used for the electromechanical transient simulation of the half-wavelength transmission system, it will inevitably cause a large deviation

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  • Dynamo-electric transient simulation method and system of half-wavelength line
  • Dynamo-electric transient simulation method and system of half-wavelength line
  • Dynamo-electric transient simulation method and system of half-wavelength line

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Embodiment Construction

[0109] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0110] The flow chart of a half-wavelength line electromechanical transient simulation method provided by the present invention is as follows: figure 1 shown, including:

[0111] When the fault occurs outside the half-wavelength line, the electromechanical transient simulation method is used for simulation calculation;

[0112] When a fault occurs on a half-wavelength line, an electromechanical transient simulation calculation is performed on the half-wavelength line by using a power frequency dynamic phasor model of a lossy AC line.

[0113] Specifically, a half-wavelength line electromechanical transient simulation method includes:

[0114] Step (1): Calculate the common parameters in the simulation process:

[0115] Known AC transmission line unit length inductance L 0 , unit length resistance R 0 , unit length capacitance ...

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Abstract

The invention provides a dynamo-electric transient simulation method and system of a half-wavelength line. The method comprises that when a fault occurs beyond the half-wavelength line, a dynamo-electric transient simulation method is used for simulation calculation; and when a fault occurs in the half-wavelength line, a power-frequency dynamic phasor model of a detrimental AC line is used to carry out dynamo-electric transient simulation calculation on the half-wavelength line. According to method and system, the dynamic phasor model is applied to dynamo-electric transient simulation of the half-wavelength line for the first time, so that the dynamo-electric transient simulation precision of a half-wavelength power transmission system is improved; the frequency in which a system plays a dominant role can be selected for analysis within the phasor domain in a goal-directed way; and compared with electromagnetic transient simulation, the computational complexity can be reduced effectively, and the simulation speed is improved.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a half-wavelength line electromechanical transient simulation method and system. Background technique [0002] Half Wave-length AC Transmission (HWACT) refers to the ultra-long-distance three-phase AC transmission technology whose electrical distance of power transmission is close to a power frequency half-wavelength, that is, about 3000km (50Hz) or about 2600km (60Hz). The power transmission of the AC line is essentially the transmission process of electromagnetic waves. When the length of the AC line is short, that is, far smaller than the wavelength of the electromagnetic wave, the voltage at one end of the line changes, and the voltage and current distribution along the line can complete the transition process almost instantaneously. steady state. However, when the length of the AC line is comparable to the wavelength of the electromagnetic wave, such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 姜懿郎张彦涛秦晓辉孙玉娇王义红苏丽宁
Owner CHINA ELECTRIC POWER RES INST
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