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Single-phase or two-phase to three-phase power supply structure utilizing balanced wiring transformer

A transformer and balancing technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problems of high cost, low economy, disconnection failure, etc., and achieve the effect of simple structure, good economy, and easy implementation.

Pending Publication Date: 2020-01-03
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When users who only access single-phase or two-phase transmission lines need to use three-phase power supply, according to the existing technology, only three-phase transmission lines can be re-erected to provide users with three-phase power supply, which takes a long time, high cost and low economy
[0003]At the same time, because the transmission line is generally erected outdoors, the geographical span is wide, and the environmental conditions are changeable. Due to the long-term mechanical force, electromagnetic force, thermal effect and severe oxidation , poor contact and other reasons, resulting in various disconnection faults, so that the equipment cannot operate normally
When the original three-phase transmission line has one or two phase disconnection faults due to external reasons, the three-phase power supply mode becomes a non-three-phase power supply mode, so that it cannot provide users with the three-phase power they need
Existing solutions can only provide three-phase power in a short period of time through economical repairs by electric maintenance personnel. However, emergency repairs in bad weather are very dangerous, and the personal safety of electric maintenance personnel is difficult to be guaranteed.

Method used

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  • Single-phase or two-phase to three-phase power supply structure utilizing balanced wiring transformer
  • Single-phase or two-phase to three-phase power supply structure utilizing balanced wiring transformer
  • Single-phase or two-phase to three-phase power supply structure utilizing balanced wiring transformer

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Embodiment 1

[0024] Such as figure 1 As shown, the embodiment of the present invention provides a single-phase or two-phase to three-phase power supply structure using a balanced wiring transformer. The power supply structure mainly includes a transmission line 1, an impedance matching balanced wiring transformer 2 and a three-phase static var generator 3. Transmission line 1 is used to transmit current to the impedance matching balance wiring transformer 2 and the three-phase static reactive power generator 3; impedance matching balance wiring transformer 2 is used to transfer the current provided by the transmission line 1 and the three-phase static reactive power generator 3 After voltage transformation and phase adjustment, a symmetrical three-phase power supply is provided to the user; the three-phase static reactive power generator 3 is used to transform the shunted current in the transmission line 1 and then supply power to the impedance matching balance wiring transformer 2; Line 1 ...

Embodiment 2

[0029] The single-phase or two-phase to three-phase power supply structure using a balanced connection transformer described in the embodiment of the present invention is the same as the basic structure of the first embodiment of the present invention, that is, figure 1 As shown, the power supply structure mainly includes a power transmission line 1, an impedance matching balance wiring transformer 2 and a three-phase static var generator 3. The transmission line 1 is used to transmit current to the impedance matching balanced wiring transformer 2 and the three-phase static reactive power generator 3; the impedance matching balanced wiring transformer 2 is used to connect the transmission line 1 and the three-phase static reactive power generator 3 After the provided current is transformed and phased, a symmetrical three-phase power supply is provided to the user; the three-phase static reactive power generator 3 is used to transform the shunted current in the transmission line 1...

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PUM

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Abstract

The invention discloses a single-phase or two-phase to three-phase power supply structure utilizing a balance wiring transformer, and belongs to the technical field of power grid power supply and distribution. The power supply structure comprises a power transmission line, an impedance matching balance wiring transformer and a three-phase static var generator, the power transmission line is connected with a terminal A at the input end of the impedance matching balance wiring transformer, a terminal P in the input port of the three-phase static var generator is connected with the power transmission line, the terminal B of the input end in the impedance matching balance wiring transformer is connected with a terminal M in the output port of the three-phase static var generator, and the terminal C of the input end in the impedance matching balance wiring transformer is connected with a terminal N in the output port of the three-phase static var generator and is grounded GND; and the phasea, the phase b and the phase c of the output end of the impedance matching balance wiring transformer are used as a three-phase power supply provided for a user.

Description

Technical field [0001] The invention relates to the technical field of power grid power supply and distribution. Background technique [0002] In the AC power supply mode of the power system, the three-phase AC power supply system is widely used. In the field of low-voltage power distribution in my country, single-phase transmission lines are generally used to provide users with electrical energy. In some areas, users are geographically dispersed, and two-phase transmission lines are also used to provide users with electrical energy. When users who only access single-phase or two-phase transmission lines need to use three-phase power, according to the existing technology, only three-phase transmission lines can be re-installed to provide users with three-phase power, which is time-consuming, high in cost, and low in economy. . [0003] At the same time, because the transmission lines are generally erected outdoors, the geographical span is wide, and the environmental conditions a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/18H02M5/14
CPCH02J3/00H02J3/1864H02M5/14Y02E40/30
Inventor 易东李群湛黄小红解绍锋郭锴张丽艳
Owner SOUTHWEST JIAOTONG UNIV