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Method and system for suppressing power frequency overvoltage of UHV half-wavelength transmission line

A power transmission line, half-wavelength technology, applied in the direction of circuit devices, AC network circuits, AC network voltage adjustment, etc., can solve problems such as line insulation damage, endangering the safe and reliable operation of the power system, and overvoltage, so as to improve the operating power factor, The effect of suppressing reactive power transmission and improving operability

Active Publication Date: 2019-12-13
SHANDONG UNIV
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Problems solved by technology

Therefore, the low power factor operation of the UHV half-wavelength transmission line may cause local power frequency overvoltage along the line, which may lead to damage to the line insulation and endanger the safe and reliable operation of the power system.

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  • Method and system for suppressing power frequency overvoltage of UHV half-wavelength transmission line
  • Method and system for suppressing power frequency overvoltage of UHV half-wavelength transmission line
  • Method and system for suppressing power frequency overvoltage of UHV half-wavelength transmission line

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[0044] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0046] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...

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Abstract

The present invention discloses an extra-high voltage half-wavelength transmission line power frequency over-voltage inhibition method and system. The method comprises the steps of: obtaining parameters and operation mode information of an extra-high voltage half-wavelength transmission line; determining reactive demand ranges of sending and receiving terminal systems; establishing an optimizationmodel to consider factors of a reactive compensation device such as fixed investment, operation and the maintenance cost, electric energy loss cost and voltage out-of-limit penalty cost; employing the genetic algorithm to solve the optimization model to determine configuration capacities of a static compensation mode and a dynamic compensation mode; allowing deciders to perform adaptation calculation of the scheme mentioned above, applying the scheme obtained through optimization calculation when a line has a certain bias in length, and if the scheme can meet the power frequency over-voltageinhibition demand, taking the scheme as a final scheme; and if the scheme cannot meet the power frequency over-voltage inhibition demand, needing to perform further regulation of the scheme to adapt the requirement of an actual transmission scene.

Description

technical field [0001] The invention relates to a method and system for suppressing power frequency overvoltage of an UHV half-wavelength transmission line. Background technique [0002] The rapid development of social economy has led to the continuous growth of power demand, and the geographical conflict between load centers and energy bases has led to the development of large-capacity and long-distance power transmission technology. In order to cope with this development direction, the "Global Energy Internet" proposes to build a UHV power grid as the backbone grid, and to focus on the transmission of clean energy, a strong smart grid that is globally interconnected and ubiquitous. UHV HWLT, Ultra high voltage half wave-length transmission (UHV HWLT, Ultra high voltage half wave-length transmission) technology refers to the ultra-long-distance three-phase AC transmission technology whose electrical distance of power transmission is close to a power frequency half-wave, abo...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/16H02J3/18
CPCH02J3/16H02J3/18H02J2203/20Y02E40/30
Inventor 田浩刘玉田
Owner SHANDONG UNIV
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