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On-load tap changer and method thereof

An on-load tap and switch technology, applied in electronic switches, electrical components, thyristors, etc., can solve problems such as complex structure, and achieve the effects of small size, high reliability and simple mechanical structure

Active Publication Date: 2018-11-06
李晓明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the various arc-free on-load tap-changers proposed at present, like the traditional on-load tap-changers, all include a shared switch, and the structure is still complicated

Method used

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  • On-load tap changer and method thereof
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  • On-load tap changer and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0070] For the convenience of description, the structure and working principle of the first simple and simple structure of the on-load tap-changer is described by taking the voltage regulating transformer with 5 taps as an example. Of course, in other embodiments, the number of taps can be replaced, decreased or increased, and this data is set for convenience of description, and is not limited thereto.

[0071] The structure of the first type of on-load tap-changer with simple structure is as follows: figure 1 shown. The two terminals J1 and J2 of the voltage regulating transformer are connected to the power system, and one end of the voltage regulating coil of the voltage regulating transformer is connected to J1; one end of the five main switches inside the first type of on-load tap changer with simple structure is respectively connected to the voltage regulating transformer The 5 taps B1, B2, B3, B4, B5, B6, the other end of the 5 main switches are connected to the termina...

Embodiment 2

[0096] For the convenience of description, the structure and working principle of the third simple and simple structure of the on-load tap-changer is described by taking the voltage regulating transformer with 5 taps as an example.

[0097]The third type of structure is simple on-load tap-changer structure, such as Figure 4 shown. The two terminals J1 and J2 of the voltage regulating transformer are connected to the power system, and one end of the voltage regulating coil of the voltage regulating transformer is connected to J1; one end of the five main switches inside the on-load tap-changer with a simple structure is connected to the voltage regulating transformer respectively. The 5 taps B1, B2, B3, B4, B5, B6, the other end of the 5 main switches are connected to the terminal J2; when any one of the main switches is closed, the voltage regulating coil of the voltage regulating transformer can flow current; different main switches are closed , the voltage regulating trans...

Embodiment 3

[0107] The sixth type of on-load tap changer with simple structure is used when the tap of the voltage regulating transformer is located in the middle of the voltage regulating coil. For the convenience of description, the structure and working principle of the third simple and simple structure of the on-load tap-changer is described by taking a voltage regulating transformer with 6 taps as an example.

[0108] The sixth structure is a simple structure of the on-load tap-changer, such as Figure 7 shown. The voltage regulating transformer has two terminals J1 and J2 connected to the power system. The beginning of the upper voltage regulating coil of the voltage regulating transformer is connected to terminal J1, and the end of the upper voltage regulating coil has taps B1, B3, B5. The lower part of the voltage regulating transformer There are taps B2, B4, and B6 at the beginning of the coil, and the end of the lower voltage regulating coil is connected to terminal J2; the six...

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Abstract

The invention discloses an on-load tap changer and a method thereof. The on-load tap changer comprises master switches, thyristor auxiliary circuits and selection switches. Each master switch is connected in series in different loops of the voltage regulating coil of a voltage regulating transformer through at least one tap. The voltage regulating coil can form a current flow path if any one of the master switches is closed. When different master switches are closed, the voltage regulating transformer outputs different voltage. When any one master switch is connected in parallel with a certainthyristor auxiliary circuit through the selection switch, the adjacent master switch can be connected in parallel with another thyristor auxiliary circuit through the selection switch so as to form two paths of switchers of the master switches connected in parallel with the thyristor auxiliary circuits. The on-load tap changer does not include the shared switcher inside. All the switches operatein turn so that on-load switching of the load current from the originally closed master switch to the master switch to be closed can be realized.

Description

technical field [0001] The invention relates to an on-load tap changer and a method thereof. Background technique [0002] Changes in the operation mode of the power system will cause changes in the bus voltage. The power system has strict requirements on the fluctuation range of the bus voltage, so the technology of adjusting the bus voltage is needed. Changing the way of power transformer taps for voltage regulation is a voltage regulation measure widely used in the power sector. Under the condition that the transformer has a load current (on-load), it is necessary to use a high-tech on-load tap-changer to switch the tap of a certain voltage of the transformer to a tap of another voltage, and to ensure that the power user does not stop power supply during the switching process. (on-load tap changer) to achieve. [0003] At present, resistive on-load tap-changers are widely used in the world. The resistive on-load tap-changer realizes the switching process of two differ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/081H03K17/72H03K17/00
CPCH03K17/007H03K17/08108H03K17/72H03K2217/0081H03K17/08116
Inventor 李晓明
Owner 李晓明
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