Phase-shifting transformer with multilateral zigzag connection
A phase-shifting transformer and zigzag-shaped technology, applied in the field of transformers, can solve problems such as large phase-shifting angle requirements and inability to apply to application scenarios, and achieve the effect of fewer windings, simple wiring, and reduced design.
Pending Publication Date: 2022-06-24
BAODING TIANWEI BAOBIAN ELECTRICAL
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Problems solved by technology
Although the phase-shifting transformer with single body and zigzag connection structure has the advantages of simple structure and high reliability, it will cause the voltage amplitude to change when adjusting the phase angle, and the phase-shifting angle is therefore clamped at a relatively low voltage. Small range, but in many applications it is necessary to ensure a constant voltage amplitude and a large phase shift angle, so this structure cannot be applied to such application scenarios
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[0049] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0050] The invention discloses a phase-shifting transformer connected in a multi-sided zigzag shape, the English name is multi-windingzig-zag PST, and the specific example is as follows: figure 1 shown,
[0051] Excitation winding 1, phase modulation unit I12 and phase modulation unit II13;
[0052]The transformer...
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The invention provides a multilateral zigzag-shaped connected phase-shifting transformer which is characterized in that a star-shaped connected excitation winding is connected to a three-phase power supply side, and the excitation winding provides excitation for two phase modulation windings in the same phase. The number of turns of the phase modulation winding is adjusted through the linearly adjustable voltage adjusting switch, so that the voltage vector of the phase modulation winding is changed. After a power supply is introduced into the transformer, in-phase voltage is sequentially connected with phase modulation winding voltage of the other two phases in series, and after three-phase voltage vectors are synthesized, voltage with the phase angle changed compared with the power supply and the amplitude unchanged is obtained to supply power to a load side, so that the function that the phase angle of the voltage on the power supply side and the voltage on the load side is changed and the amplitude is constant is achieved. The polarity of the phase modulation winding is changed through the ARS polarity change-over switch, and the number of turns of different series-connected phase modulation windings is selected through the linear voltage regulation switch, so that the voltage phase angle of the load side is controlled to be ahead or lagged than that of the power side, and step-by-step stepping of the phase shift angle is controlled.
Description
technical field [0001] The invention belongs to the technical field of transformers, and in particular relates to a phase-shifting transformer connected in a polygonal zigzag shape. Background technique [0002] The high-voltage phase-shifting transformer can control the power flow distribution of a specific line in a complex transmission network by changing the phase of the voltage on the power supply side and the load side on the transmission line. Although the phase-shifting transformer with a single body and a meandering connection structure has the advantages of simple structure and high reliability, when adjusting the phase angle, it will lead to the change of the voltage amplitude, and the phase-shift angle is therefore clamped at a relatively high level. However, in many applications, it is necessary to ensure that the voltage amplitude is constant and the phase shift angle is required to be large, so this structure cannot be applied to such application scenarios. ...
Claims
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IPC IPC(8): H01F27/30H01F27/29
CPCH01F27/306H01F27/29
Inventor 李程范洪涛杨哲程玉芳李文平张栋
Owner BAODING TIANWEI BAOBIAN ELECTRICAL