Alternating parallel nine-speed transformer on-load voltage regulation circuit capable of polarity conversion

Abstract

The invention relates to the field of distribution transformers and provides an alternating parallel nine-speed transformer on-load voltage regulation circuit capable of polarity conversion, and the circuit comprises a main winding, a polarity conversion switch, a voltage regulating winding, a transition switching unit, a rated voltage branch and five voltage regulating branches. The circuit provided by the invention sets a polarity conversion switch between the main winding and the voltage regulating winding, and realizes positive and negative pressure regulation by adjusting the independentcontact connecting end of the polarity conversion switch. One ends of the respective voltage regulating branches are respectively connected to two end taps and each of the intermediate taps of the voltage regulating winding; the other ends are adjacently staggered and connected in parallel in two groups and respectively connected with two input ends of the transition switching unit; the input endof the rated voltage branch is connected to the taps of the output end of the main winding, and the output of the rated voltage branch is connected to the output end of the voltage regulating circuit.The circuit has the beneficial effects of reducing the on-off frequency of the on-off switch, increasing the service life of the corresponding pressure regulating switch, and during the voltage-regulating process, varying the transition voltage with the pressure regulating gear position with no shifting pressure regulation required.

Description

technical field [0001] The invention relates to the field of distribution and transformation transformers, in particular to an on-load voltage regulation circuit of a transformer. Background technique [0002] In the patent with the application number 201610121960 and the title: "A Permanent Magnet Vacuum On-Load Voltage Regulator, Transformer and On-Load Voltage Regulation Method", it provides a method of using two vacuum interrupters to form the main circuit and the transition circuit respectively. Structural on-load voltage regulation method. The key points of this technical solution are: during normal operation, the vacuum interrupter of the main circuit is connected, the main circuit is in the connected state, the vacuum interrupter of the transition circuit is disconnected, the transition circuit is in the disconnected state, The pressure winding determines the external voltage supply gear of the circuit. When the gear is switched, the transition circuit vacuum inter...

AI Technical Summary

Problems solved by technology

The upper limit of its on-off times determines the service life of the voltage regulating switch designed according to this circuit." This defect remains unchanged.

And as the number of switch gears increases, the number of transition circuit selection switches also increases, and the switch structure tends to be complicated

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