Capacity and voltage regulating transformer

Abstract

The invention discloses a capacity and voltage regulating transformer, which comprises a low-voltage winding, a high-voltage winding, a capacity regulating switch and a voltage regulating switch; a capacity regulating switch driving winding is a Dy connection mode in a high-capacity state; the capacity regulating switch driving winding is the Dy connection mode in a low-capacity state; the voltageregulating switch comprises a rated vacuum arc extinguishing chamber and a transition vacuum arc extinguishing chamber connected with a transition resistor in parallel; and the rated vacuum arc extinguishing chamber is connected with the transition vacuum arc extinguishing chamber in series. The ratio of a high capacity no-load loss to a low-capacity no-load loss of a Dy / Dy capacity regulating transformation mode is about 4:1; compared with other capacity regulating transformation modes, the Dy / Dy capacity regulating transformation mode has the advantage that the no-load loss at low capacityis lower, so that the Dy / Dy capacity regulating transformation mode is especially suitable for application in an occasion with a great electricity peak-valley difference; and boosting is matched through the arrangement of the vacuum arc extinguishing chambers, so that on-load voltage regulation is achieved and voltage regulation can be achieved through the capacity regulating transformer in the Dy / Dy capacity regulating mode.

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 capacity-regulating and voltage-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 l...

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

Images