Tap switching method and device of phase-shifting transformer and terminal equipment

A phase-shifting transformer and tap switching technology, applied in the field of electric power, to achieve the effect of enhancing stability, reducing transient process and improving response speed

Pending Publication Date: 2022-08-09
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a degree of freedom in the synthesis method of the asymmetric voltage ST operating point, that is, the same operating point may correspond to different tap positions and winding states. How to determine the most appropriate tap switching strategy is a problem that needs to be solved at present.

Method used

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  • Tap switching method and device of phase-shifting transformer and terminal equipment
  • Tap switching method and device of phase-shifting transformer and terminal equipment
  • Tap switching method and device of phase-shifting transformer and terminal equipment

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Embodiment Construction

[0043] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are set forth in order to provide a thorough understanding of the embodiments of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0044] In order to illustrate the technical solutions of the present invention, the following specific embodiments are used for description.

[0045] The embodiment of the present invention provides a tap switching method of a phase-shifting transformer. The phase-shifting transformer is composed of three single-phase four-winding transformers, the three-phase windings on...

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Abstract

The invention is suitable for the technical field of electric power, and provides a tap switching method and device of a phase-shifting transformer and terminal equipment, and the method comprises the steps: obtaining a target compensation voltage vector; determining at least one target tap switching combination according to the target compensation voltage vector; wherein the target tap switching combination comprises the access state of each stage of winding in each phase of secondary winding; calculating the switching action quantity when the current tap switching combination is switched to each target tap switching combination; and performing tap switching on the phase-shifting transformer based on the target tap switching combination with the minimum switching action quantity. According to the invention, the most suitable tap switching strategy can be determined to carry out tap switching on the phase-shifting transformer.

Description

technical field [0001] The invention belongs to the field of electric power technology, and in particular relates to a tap switching method, device and terminal equipment of a phase-shifting transformer. Background technique [0002] In recent years, with the rapid growth of the scale of new energy sources such as distributed photovoltaics connected to the power grid, it has brought severe challenges to the evacuation, consumption, and power flow optimization control of new energy sources. Flexible AC transmission devices (such as power flow controllers) based on power electronics technology can effectively improve the transmission capacity of the transmission network, and realize the optimization of the power flow distribution in the system on the time scale and the balance on the space scale. [0003] Among them, the Sen Transformer (ST) enables low-cost power flow control using transformer and on-load tap-changer tap-change technology. The ST injects a series voltage of ...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02P13/06
CPCH02J3/06H02P13/06H02J2203/10Y02E40/30
Inventor 曾四鸣杨鹏梁纪峰董靓媛戎士洋李晓军穆恒玲
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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