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Direct-current ice-melting power supply topology

A DC ice melting and power supply technology, which is applied in the installation of flexible AC power transmission systems, electrical components, cables, etc., can solve the problems of low cost performance, no prospect of engineering application promotion, single function, etc. Promote prospects and eliminate the effect of single function

Active Publication Date: 2015-01-28
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current DC ice-melting power supply only has the ice-melting function, which can only be used during a specific time in winter, and has the disadvantage of a single function.

Method used

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  • Direct-current ice-melting power supply topology
  • Direct-current ice-melting power supply topology
  • Direct-current ice-melting power supply topology

Examples

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Embodiment Construction

[0046] For the sake of reference and clarity, the technical terms, abbreviations or abbreviations used in the following text are summarized as follows:

[0047] SVG: Static Var Generator, static var generator. The device generates reactive power and filters harmonics by relying on the frequent actions of its internal electronic switches to generate reactive current. The basic principle of SVG is that the self-commutated bridge circuit can be connected to the power grid through a reactor or directly in parallel, and the phase and amplitude of the output voltage on the AC side of the bridge circuit can be properly adjusted, or the current on the AC side can be directly controlled, so that the circuit can Absorb or send out reactive current that meets the requirements to achieve the purpose of dynamic reactive power compensation.

[0048] dq transformation: It is a decoupling control method, which transforms the three-phase winding of the asynchronous motor into an equivalent tw...

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Abstract

The invention discloses a direct-current ice-melting power supply topology which comprises a first network high voltage breaker QF1, a second network high voltage breaker QF2, a phase-shift multi-winding rectifier transformer, a current converter and an isolating switch module, wherein various topology structures can be formed through different operations of the first network high voltage breaker QF1, the second network high voltage breaker QF2 and the isolating switch module; a direct-current ice-melting power supply topology structure can be formed by closing the first network high voltage breaker QF1, breaking the second network high voltage breaker QF2 and closing the isolating switch module; and conversely, a SVG (Scalable Vector Graphics) topology structure can be constructed by breaking the first network high voltage breaker QF1, closing the second network high voltage breaker QF2 and breaking the isolating switch module. Thus, the direct-current ice-melting power supply topology has a direct current meting ice function and a static idle generator function; and the defect that the existing direct-current ice-melting power supply is single in function is eliminated, so that the power supply is improved in cost performance and has a good engineering application popularization prospect.

Description

technical field [0001] The invention belongs to the technical field of DC ice-melting power supplies, and in particular relates to a DC ice-melting power supply topology. Background technique [0002] Icing on transmission lines is one of the major natural disasters in the power system, which can cause power interruptions and even grid disconnection and other accidents. The repair work for the above-mentioned accidents is difficult and takes a long time, which will pose a serious threat to the power system and even the national economy. In order to eliminate the hazards caused by icing on transmission lines, DC deicing technology is usually used to melt the ice on transmission lines. [0003] The principle of DC ice melting is to use the ice-coated line as a load, and apply a DC ice-melting power supply to it. The DC ice-melting power supply uses a lower voltage to provide a short-circuit current to heat the ice-covered line, thereby melting the ice. However, the current D...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02G7/16H02J3/18H02M5/458
CPCY02E40/12Y02E40/10
Inventor 罗仁俊敬华兵邓明黄艳燕秦灿华何伯钧
Owner ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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