Nine-speed transformer on-load voltage regulating circuit with polarity switching

Abstract

The present invention relates to the field of transformer on-load voltage regulation, and provides a nine-speed transformer on-load voltage regulation circuit with polarity conversion. The circuit includes a main circuit, a transition circuit, and a rated voltage branch. The main circuit includes a main winding, a voltage regulating winding, five voltage regulating branches, and a vacuum interrupter, and the voltage regulating winding is provided with five taps. Each voltage regulating branch is connected to each tap and connected to an internal connection end of the vacuum interrupter of themain circuit, and each voltage regulating branch is connected in series to a selection switch. An output end of the main winding is connected to an upper end tap and a lower end tap of the voltage regulating winding by using a polarity switch. One end of the transition circuit is divided into two branches connected in serials to a set of interlocking switches. The two branches are respectively connected to an upper middle end tap and a lower middle end tap of the voltage regulating winding, and the other end is connected to the external connection end of the vacuum interrupter. One end of therated voltage branch is connected to an output end of the main winding, and the other end is connected to the internal connection end of the vacuum winding. In a voltage regulation process, the transition voltage varies with the range, so that voltage fluctuations in voltage regulation are effectively reduced.

Description

technical field [0001] The invention relates to the field of on-load voltage regulation of transformers, in particular to a nine-speed on-load positive and negative voltage regulation circuit. Background technique [0002] The positive and negative voltage regulation method is to set a polarity conversion switch between the main winding and the voltage regulation winding, and adjust the connection end of the polarity conversion switch to change the winding direction of the voltage regulation winding connected to the voltage regulation circuit to achieve bidirectional Voltage regulation, each voltage regulating winding can realize two-speed voltage regulation. Compared with conventional voltage regulation methods, it can save half of the number of voltage regulation windings and greatly reduce the cost of voltage transformation equipment. [0003] Jinan Aidi Electric Equipment Co., Ltd. has applied for the following patents in China: Application No.: 201721680735.9, titled: ...

AI Technical Summary

Problems solved by technology

Therefore, if this solution is applied to the field of multi-gear voltage regulation, the voltage of the highest gear will be too large due to the gap with the transition voltage, causing the problem of excessive voltage fluctuations.

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