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A new type of autotransformer for voltage regulation and its voltage regulation method

A technology of autotransformer and voltage regulation method, which is applied in the direction of transformers, variable transformers, variable inductors, etc., can solve the problems of not being able to instantly capture subtle changes in the power grid, single tap position for voltage regulation, and inability to satisfy transformers, etc. Achieve the effect of reducing the connection between switches, ensuring product performance and improving labor productivity

Active Publication Date: 2022-07-22
TBEA SHENYANG TRANSFORMER GRP CO LTD
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AI Technical Summary

Problems solved by technology

[0002] At present, 220KV transformers for power equipment generally adopt constant magnetic flux voltage regulation in China, and the required number of voltage regulation taps is small and the voltage regulation tap position is single.
This voltage regulation method has little effect on the small changes in the power grid, and cannot capture subtle changes in the power grid instantly.
However, the current industry and economy are increasingly developed, resulting in a large demand for industrial electricity and a wider range of voltage regulation. A single voltage regulation method can no longer meet the needs of transformers with larger voltage regulation ranges.
[0003] At present, the use of high-voltage no-load regulation plus on-load regulation 220KV autotransformer has not been reported.

Method used

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  • A new type of autotransformer for voltage regulation and its voltage regulation method
  • A new type of autotransformer for voltage regulation and its voltage regulation method
  • A new type of autotransformer for voltage regulation and its voltage regulation method

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Embodiment Construction

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] like figure 1 As shown, the winding arrangement diagram of a new voltage regulation method of the present invention, the single-column coil from the inside to the outside includes LV as the medium voltage winding (common winding), LTC as the on-load voltage regulation winding, and HV as the high-voltage winding (ie the series winding). ), DETC is the no-load voltage regulating winding, and TV is the third winding. Among them, the LTC on-load voltage regulating winding and the DETC no-load voltage regulating winding are connected to the end of the HV high-voltage winding, and the on-load voltage regulating winding is located between the HV high voltage and the LV medium voltage main air channel, which can effectively avoid the on-load voltage regulation. The problem of large impedance fluctuations ensures the stable operation of the trans...

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Abstract

The invention relates to an autotransformer with a novel voltage regulation mode and a voltage regulation method thereof. The high and medium voltage part of each phase comprises a high voltage winding HV, a no-load voltage regulating winding DETC, an on-load voltage regulating winding LTC and a medium voltage winding which are connected in sequence. LV; an off-load tap changer is connected between the off-load voltage regulating winding DETC and the on-load voltage regulating winding LTC. The invention guarantees product performance and reduces the complexity of design, process and production, and greatly improves labor productivity. At the same time, the voltage regulating coil is not connected to the rated tap, which increases the reliability of operation, and reduces a no-load switch, which can reduce the connection between switches, reduce space, and reduce economic costs.

Description

technical field [0001] The invention relates to the technical field of transformer manufacturing, in particular to an autotransformer with a novel voltage regulation mode. Background technique [0002] At present, 220KV transformers of power equipment generally use constant magnetic flux voltage regulation in China, and the required voltage regulation taps are few and the voltage regulation taps are single. This voltage regulation method has little effect on the small change of the power grid, and cannot capture the subtle changes of the power grid instantaneously. However, the current industry and economy are increasingly developed, resulting in a large demand for industrial electricity and a wider range of voltage regulation. A single voltage regulation method can no longer meet the needs of transformers with larger voltage regulation ranges. [0003] At present, there is no report on the use of high-voltage no-load regulation plus on-load regulation 220KV autotransformer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F29/02
CPCH01F29/02H01F29/025
Inventor 刘俊延林阳李建军符雪鹏
Owner TBEA SHENYANG TRANSFORMER GRP CO LTD
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