Steady state voltage sensitivity determination method and apparatus for half-wavelength electric transmission line

A transmission line, steady-state voltage technology, applied in circuit devices, AC network circuits, AC network voltage adjustment and other directions, can solve problems such as the lack of accurate quantitative analysis of voltage sensitivity, and achieve the effect of improving the level of safe and stable operation

Active Publication Date: 2017-09-08
CHINA ELECTRIC POWER RES INST +3
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, the voltage distribution has been qualitatively analyzed from the two aspects of incoming and reflected waves and reactive power demand, but there is no accurate quantitative analysis for the analysis of voltage sensitivity.

Method used

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  • Steady state voltage sensitivity determination method and apparatus for half-wavelength electric transmission line
  • Steady state voltage sensitivity determination method and apparatus for half-wavelength electric transmission line
  • Steady state voltage sensitivity determination method and apparatus for half-wavelength electric transmission line

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Embodiment 1

[0059] Embodiment 1 of the present invention provides a method for determining the steady-state voltage sensitivity of a half-wavelength transmission line, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:

[0060] S101: Obtain parameters of the half-wavelength transmission line;

[0061] S102: Establish a half-wavelength transmission line steady-state voltage model according to the parameters of the half-wavelength transmission line collected in S101;

[0062] S103: Determine the voltage sensitivity according to the half-wavelength transmission line steady-state voltage model established in S102.

[0063] The parameters of the half-wavelength transmission line in S101 above include active power and reactive power at the end of the half-wavelength transmission line, and the frequency of the half-wavelength transmission line.

[0064] Embodiment 1 of the present invention adopts a multi-unit infinite system, and the sending unit tran...

Embodiment 2

[0085] Embodiment 2 of the present invention provides a device for determining the steady-state voltage sensitivity of a half-wavelength transmission line, which specifically includes an acquisition module, a modeling module, and a determination module. The functions of these three modules are respectively introduced below:

[0086] The collection module is mainly used to collect the parameters of the half-wavelength transmission line;

[0087] The modeling module is mainly used to establish the steady-state voltage model of the half-wavelength transmission line according to the parameters of the half-wavelength transmission line;

[0088] The determination module is mainly used to determine the voltage sensitivity according to the half-wavelength transmission line steady-state voltage model.

[0089] The parameters of the half-wavelength transmission line collected by the above acquisition module include active power and reactive power at the end of the half-wavelength transm...

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Abstract

The invention provides a steady state voltage sensitivity determination method and apparatus for a half-wavelength electric transmission line. Parameters of the half-wavelength electric transmission line are collected firstly; then a steady state voltage model of the half-wavelength electric transmission line is established according to the parameters of the half-wavelength electric transmission line; and finally, the voltage sensitivity is determined according to the steady state voltage model of the half-wavelength electric transmission line. According to the technical scheme provided by the invention, by virtue of the steady state voltage model of the half-wavelength electric transmission line, the steady state voltage sensitivity of the half-wavelength electric transmission line is calculated; a relation among the voltage of the half-wavelength line along the line, load active power, load reactive power and system frequency change can be reflected; and the determination method and apparatus can be used for theoretical and simulation analysis of the half-wavelength power transmission system, and operation and control of the actual half-wavelength line, system operation and effective control measures adopted by analyzers can be promoted, and safe and stable operation level of the power system can be improved.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a method and device for determining the steady-state voltage sensitivity of a half-wavelength transmission line. Background technique [0002] Half-wave power transmission refers to the ultra-long-distance three-phase AC power transmission whose electrical distance is close to a power frequency half-wave, that is, 3000 km (50 Hz) or 2600 km (60 Hz). As a new ultra-long-distance and large-capacity power transmission form, the half-wave transmission line has reactive power self-balancing throughout the line and does not require reactive power compensation equipment. The system is simple, the number of equipment is small, the economy is good, and the reliability is high. , Transnational power transmission and power supply in remote areas are highly competitive. [0003] Since the Soviet scholar A.A.Wolf and others proposed the half-wave AC power transmission method in the 194...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12
CPCH02J3/12H02J2203/20
Inventor 林伟芳易俊王安斯贾俊川任大伟王歆方诗卉吴萍于强江伟黄道姗张慧瑜
Owner CHINA ELECTRIC POWER RES INST
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