Capacity-adjusting transformer suitable for clear seasonal or periodical load changes

Abstract

The invention discloses a capacity-adjusting transformer suitable for clear seasonal or periodical load changes. The capacity-adjusting transformer comprises a high-voltage winding and a low-voltage winding; the high-voltage winding and the low-voltage winding each comprise two to six series-parallel sections and a common section; when the transformer runs at the high-capacity tap position, the series-parallel sections of the high-voltage winding and the low-voltage winding are respectively connected in parallel to be connected with one parts of the corresponding common sections in series for running; when the transformer runs at the low-capacity tap position, the series-parallel sections of the high-voltage winding and the low-voltage winding are respectively connected in series to be connected with windings of the tapped positions of the corresponding common sections in series for running. According to the capacity-adjusting transformer, the difference between the rated capacity at the high-capacity tap position and the rated capacity at the low-capacity tap position of the transformer is large, and the capacity-adjusting transformer is more suitable for areas with large load differences; no-load loss reduction is large, so that when the capacity-adjusting transformer is applied to the areas with large load differences, the energy saving effect is more remarkable, and the unbalanced load bearing capacity of the transformer is improved; when loads are lower than the rated capacity at the low-capacity tap position, the transformer can run at the low-capacity tap position, and full-capacity running can be achieved at the low-capacity tap position of the transformer.

Description

technical field [0001] The invention relates to a capacity regulating transformer suitable for distinct seasonal or time-period load changes, which has a large level difference in rated capacity and can realize the function of on-load capacity regulating, and belongs to the technical field of distribution transformers. Background technique [0002] Due to the frequent occurrence of winter smog, some cities in my country vigorously promote coal-to-electricity conversion, and introduce a "peak-valley electricity price subsidy policy" from 9:00 p.m. The peak load rate of electricity consumption in summer may only be 20-30%, and the load rate in spring and autumn is as low as 10%. [0003] Offices such as office buildings have obvious time-period loads, and the load rate during working hours is high, while the load rate during non-working hours is very low. [0004] The ratio of the rated capacity of the high-capacity gear and the low-capacity gear of an ordinary capacity-adjust...

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Problems solved by technology

[0007] Aiming at the problem that the existing capacity regulating transformer has a small capacity difference and is applied to areas with obvious seasonal load changes and large load differences, the energy-saving effect is not obvious, and proposes a transformer with a large capacity difference that is suitable for seasonal or time-period loads. Distinctly changing capacity regulating transformer

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