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Ultra-high voltage AC transformer phase selection, opening and closing control method and device

An ultra-high voltage AC and control method technology, applied in the direction of converting AC power input to AC power output, circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., which can solve the complex calculation process and accurate calculation results. In order to achieve the effect of excitation inrush current suppression,

Active Publication Date: 2019-12-03
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +3
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Problems solved by technology

[0004] However, in the above method, when the control equipment estimates the residual flux linkage, the influence of factors such as the compensation capacitor on the low-voltage side needs to be considered. The magnetizing inrush current generated is suppressed to a low level

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  • Ultra-high voltage AC transformer phase selection, opening and closing control method and device
  • Ultra-high voltage AC transformer phase selection, opening and closing control method and device
  • Ultra-high voltage AC transformer phase selection, opening and closing control method and device

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Embodiment Construction

[0057] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0058] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0059]In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, component...

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Abstract

The invention relates to the field of transformer intelligent control, in particular to an ultra-high voltage AC transformer phase selection, opening and closing control method and device. The methodcomprises the following steps: detecting the main control phase voltage of the ultra-high voltage AC transformer when receiving an opening command and controlling the three phases of the ultra-high voltage AC transformer to open according to the main control phase voltage, wherein the residual magnetic link of the ultra-high voltage AC transformer is close to or equal to zero after opening; and controlling the three phases of the ultra-high voltage AC transformer to close when receiving a closing command. The three-phase opening and closing of the ultra-high voltage AC transformer are controlled through one-phase voltage to realize that the residual magnetic link of the ultra-high voltage AC transformer is close to or equal to zero after the opening, and the ultra-high voltage AC transformer is controlled to close under the condition of zero residual magnetic link and thus the effect of suppressing the closing impact can be achieved.

Description

technical field [0001] The present disclosure relates to the field of intelligent control of transformers, in particular to a method and device for phase selection, opening and closing control of UHV AC transformers. Background technique [0002] The UHV AC transformer is one of the core components in the UHV power grid. The UHV AC transformer phase selection opening and closing control method is a method of controlling the UHV AC transformer opening and / or closing using the phase selection control technology. [0003] In the related art, in order to suppress the excitation inrush current generated when the UHV AC transformer is switched on, the UHV AC transformer phase selection opening and closing control method usually includes the following steps: the control device controls the UHV AC transformer to open at any opening time Finally, estimate the residual flux linkage of the UHV AC transformer. The control device determines the closing time according to the estimated re...

Claims

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Application Information

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IPC IPC(8): H02H9/00H02P13/00
CPCH02H9/002H02P13/00
Inventor 刘洪正项祖涛王大鹏张国辉井雨刚李宽黄昕高锐
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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