Novel adjustable-capacity transformer

Abstract

The invention discloses a novel adjustable-capacity transformer. The novel adjustable-capacity transformer comprises a low-voltage winding, a high-voltage winding and a capacity adjusting switch, wherein the capacity adjusting switch comprises a high-voltage coil switching system and a low-voltage coil switching system; in a high-capacity state, the windings are connected in a Dy mode, and in a low-capacity state, the windings are connected in the Dy mode; the high-voltage coil switching system comprises a first high-voltage vacuum arc-extinguishing chamber, a second high-voltage vacuum arc-extinguishing chamber, a first high-voltage transitional vacuum arc-extinguishing chamber and a second high-voltage transitional vacuum arc-extinguishing chamber connected with a transitional resistor in parallel, wherein the first high-voltage vacuum arc-extinguishing chamber is connected with the second high-voltage vacuum arc-extinguishing chamber in series. In a Dy/Dy capacity adjusting transforming mode, the no-load loss ratio of the high capacity to the low capacity of the novel adjustable-capacity transformer is about 4:1, so that no-load loss in the low capacity of the novel adjustable-capacity transformer is lower, and then the novel adjustable-capacity transformer is especially suitable for being applied to occasions with large peak-valley difference of electricity utilization; byadopting the vacuum arc-extinguishing chambers to achieve capacity adjusting, the purpose of arc extinguishing can be effectively achieved, the overall structure is simple, and on-load capacity adjusting is achieved.

Description

technical field [0001] The invention belongs to the technical field of transformer equipment in the electric power industry, and in particular relates to a novel capacity regulating transformer. Background technique [0002] In occasions where there is a large difference between peak and valley power consumption, such as office buildings and other office spaces, commercial cities, development zones and tourist areas, etc., there are obvious time-period loads, and the load rate during working hours is high, while the load rate during non-working hours is very low. ; In order to curb the frequent occurrence of winter smog in the north, some areas have vigorously promoted the conversion of coal to electricity, and introduced the "peak and valley electricity price subsidy policy" from 9:00 pm to 6:00 am, making the peak load rate of electricity consumption in winter as high as 70-85% , and the peak load rate of electricity in summer may only be 20-30%, and the load rate in sprin...

AI Technical Summary

Problems solved by technology

In these occasions, if the traditional capacity adjustment method is adopted, the no-load loss at low capacity will be very high

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