Function of the transformer's on-load tap-changer
The main function ofthe transformeron-load tap-changeris to regulate the transformer output voltage. The on-load tap-changer is a voltage regulating device suitable for operation under excitation or load of the transformer. By changing the position of the taps in the transformer windings, the number of turns in the windings and the voltage ratio of the transformer can be changed, which ultimately achieves the purpose of voltage regulation. 12
Principle of operation
The basic principle of the on-load tap-changer is to switch between the taps in the transformer winding without interrupting the load current. In this way, the number of turns in the winding can be changed, and thus the voltage ratio of the transformer can be adjusted for the purpose of voltage regulation.
Types and application scenarios
Tap changers are divided into non-excited tap changers and on-load tap changers. On-load tap-changers are mainly used in power systems, especially in transformers, to operate under transformer excitation or load and to regulate the voltage.
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transformer output voltage
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