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Saturated iron core type fault current limiter

A fault current limiter, iron core technology, applied in emergency protection circuit devices, electrical components, emergency protection circuit devices for limiting overcurrent/overvoltage, etc. High power consumption, to achieve the effect of reducing design difficulty, improving energy consumption and heat dissipation, and reducing power consumption

Inactive Publication Date: 2015-08-12
SOUTHEAST UNIV +4
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a saturated iron-core fault current limiter, which is used to solve the problem that the existing saturated iron-core fault current limiter needs to provide a large enough DC current, and the system Technical problems such as high power consumption, difficult heat dissipation, and difficult design of DC power supply

Method used

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  • Saturated iron core type fault current limiter
  • Saturated iron core type fault current limiter
  • Saturated iron core type fault current limiter

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Such as figure 1 Shown is the basic principle diagram of the present invention. The core structure 1 of the new fault current limiter is a four-column type. Two sets of DC windings 2 and 4 are connected in series and wound on the two core columns in the middle. The direction of the magnetic field generated in is the same, and the AC winding 3 is connected in series between the AC power supply AC and the load R L between, and the AC winding 3 is wound on the outside of the DC windings 2 and 4, and the winding is carried out with the middle two stems as a whole as the winding axis.

[0019] The new saturated iron core current limiter has two loops, and the DC loop is a series connection of a DC current source DC, a resistor R2, a set of DC windings 2 and 4, and a switch S2. The AC circuit is AC voltage source AC, resistor R1, switch S1, load resistor R L And t...

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Abstract

The invention discloses a saturated iron core type fault current limiter, comprising a four-column type iron core, two sets of DC windings, and one set of AC winding. The two sets of DC windings are in series connection, and are connected to a DC power source, and respectively wind around the two core columns at the middle of the four-column type iron core, and the magnetic field directions generated by the two sets of DC windings in the iron core are of the same. The AC winding is in series connection between the AC power supply and a load RL. The AC winding winds around the outer side of the DC winding in a manner that the middle two core columns are used as the winding shaft. The saturated iron core type fault current limiter is advantageous in that the structure is simple; short circuit current can be effectively restricted; power consumption is little and heat radiation is good.

Description

technical field [0001] The invention relates to the technical field of electric power design, in particular to an iron core structure of a fault current limiter. Background technique [0002] With the expansion of power system, the development of distributed generation technology and the interconnection of power grids, the short-circuit capacity of the system is getting larger and larger, and the short-circuit current is showing a rising trend. The research of fault current limiter has become a hot spot. The fault current limiter is applied to the high-voltage power grid, which can effectively limit the short-circuit current of the system after a short-circuit fault. The fault current limiter shows a small impedance when the power grid is operating normally, and can quickly present a high impedance after a short-circuit fault occurs in the power grid, limiting the fault current to a certain level. [0003] The basic magnetic saturation type fault current limiter, its DC coi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/02
Inventor 郑建勇董志军赵晔沙浩源梅军
Owner SOUTHEAST UNIV
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