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Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer

An autotransformer, transformer technology, applied in the direction of transformers, variable transformers, transformer/inductor coils/windings/connections, etc., can solve the problem of increasing the cost of transformer development, and achieve the effect of saving procurement costs and reducing overall costs.

Inactive Publication Date: 2015-07-01
CHINT ELECTRIC
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Problems solved by technology

[0004] What the present invention aims to solve is the technical problem that three single-phase voltage regulating switches must be selected for the voltage regulation of the three-phase autotransformer in the voltage regulation method of the existing three-phase on-load voltage regulating autotransformer, which leads to a substantial increase in the overall development cost of the transformer

Method used

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  • Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer
  • Voltage regulating method for three-phase loaded voltage-regulating self-coupling transformer

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Embodiment

[0014] Such as figure 2 As shown, it is the schematic diagram of the voltage regulation wiring of the three-phase on-load voltage regulation autotransformer provided by the present invention. The voltage regulation of the high-voltage voltage is realized by changing the iron core flux mode of the transformer, and the series windings 1 in the transformer are serially connected in series The winding 2 and the voltage regulating winding 3, that is, the voltage regulating winding 3 is connected in series at the end of the common winding 2, and the three-phase on-load voltage regulating autotransformer adopts a three-phase integrated voltage regulating switch. The voltage regulating winding 2 is located at the end of the common winding 3, and the current outflow terminals of the voltage regulating winding 2 (ie, the current outflow terminals of the voltage regulating switch) are connected together. Because the current outflow terminal of the three-phase integrated on-load switch i...

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Abstract

The invention discloses a brand-new method for regulating the voltage of a three-phase self-coupling transformer. The voltage regulation of the three-phase self-coupling transformer is realized through a variable-flux voltage regulating mode; a voltage regulating winding is in series connected to a tail end of a public winding, so that the self-coupling transformer can meet the voltage regulation needs of the three-phase self-coupling transformer through a three-phase integrated switch.

Description

technical field [0001] The invention relates to a voltage regulation method of a three-phase on-load voltage-regulating autotransformer, which belongs to the technical field of three-phase oil-immersed power transformers, and is particularly applied to a three-phase on-load voltage-regulating autotransformer. Background technique [0002] Three-phase on-load tap-changing autotransformer is a power transformer that is more and more widely used in the power grid because the loss is about 40% lower than that of ordinary power transformers with the same capacity. The 220kV power transformers of Jiangsu Provincial Grid all adopt autotransformers, which is formally based on its significant low loss advantage. The traditional design scheme of the three-phase on-load voltage regulating autotransformer is: adopt the constant flux voltage regulation (CFVV) method, connect the voltage regulating winding in series at the end of the series winding, and change the high voltage by changing...

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Application Information

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IPC IPC(8): H01F29/04H01F27/28
Inventor 黄华李锦彪张杰仲照龙
Owner CHINT ELECTRIC
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