Stepless capacity adjustment split phase-shifting transformer

Abstract

The invention discloses a stepless capacity adjustment split phase-shifting transformer, which mainly includes a stepless capacity adjustment split phase-shifting isolation rectifier transformer, an on-load magnetism adjustment switch, a control box and a fully tuned filter device. Each of the primary winding and the secondary winding of the stepless capacity adjustment split phase-shifting isolation rectifier transformer includes an upper section and a lower section. The upper and lower sections of the primary winding adopt a delta connection method, and are connected in parallel. The upper and lower sections of the secondary winding adopt an extended delta connection method. The fully tuned filter device is a three-phase LC filter circuit, and is connected in parallel to the head-tail joints of three basic coils. According to the intelligent stepless capacity adjustment split phase-shifting isolation filter and rectifier transformer of the invention, the capacity can be automaticallyadjusted according to the actual load of the transformer, the secondary outgoing lines are connected in parallel after passing through a rectifier device so that the existence of low-order harmonicsis completely eliminated, the fundamental frequency is staggered by phase shifting on the secondary side to improve the quality of the power grid, and shielding is added between the primary and secondary sides to avoid accident impact and further increase safety protection.

Description

technical field [0001] The invention belongs to the technical field of electric energy utilization, and in particular relates to a stepless capacity-adjusting split phase-shifting transformer. Background technique [0002] Due to the practical needs of electric vehicles in terms of energy saving and emission reduction and the medium and long-term situation of fossil energy depletion, many automobile factories at home and abroad are actively researching and promoting electric vehicles. [0003] The emergence of new energy vehicles has made the construction of electric vehicle charging piles inevitable, and the design of the power supply system of the entire electric pile has become the key. Of course, as an indispensable equipment for the power supply system, the transformer naturally becomes the top priority. [0004] Comprehensive consideration, the intelligent transformer for electric vehicle charging pile should at least meet the following requirements: [0005] First o...

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Problems solved by technology

Secondly, the grid pollution caused by the rectification device and reactive power compensation device of the multi-electronic components of the charging pile must also be improved as much as possible.

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