A magnetically integrated three-phase filter transformer

Abstract

The invention discloses a magnetic-integration three-phase filter transformer. The magnetic-integration three-phase filter transformer comprises a transformer core window, wherein a leakage flux branch plate is arranged in the transformer core window; gaps are respectively reserved between the leakage flux branch plate and an upper yoke and between the leakage flux branch plate and a lower yoke; a high-voltage winding coil and a low-voltage winding coil are respectively wound between core columns and the leakage flux branch plate; a low-voltage winding is positioned on the inside, and a high-voltage winding is positioned on the outside; and a filter capacitor is connected with the low-voltage winding coil in parallel. A filter inductor is integrated with the transformer, so that the size of the integrated body of the inductor and the transformer is small, the inductor and the transformer are light, and materials are saved. The columns of three-phase cores are in magnetic flux with the filter inductor and the transformer simultaneously. When the magnetic flux is highest, common magnetic flux and leakage magnetic flux are in different phases, and magnetic cores can be saved to a certain degree. Four single-phase windings of the transformer also have a filtering function, and substitute an independent filter inductor. Moreover, the number of used copper wires of the transformer and the inductor which are integrated is smaller than the number of used copper wires of the transformer and the inductor which are independent from each other.

Description

technical field [0001] The invention belongs to the technical field of transformers, and relates to a magnetically integrated filter three-phase transformer. Background technique [0002] Sodium-sulfur battery is a new type of energy storage battery, which uses sodium and sulfur as electrode active materials and β-alumina ceramics as electrolyte, based on the electrochemical reaction of sulfur and sodium to form sodium sulfide. It has the advantages of high power, high energy density, high efficiency, good temperature stability, low raw material cost, many charge and discharge times, long life, and safety. As an energy storage system, sodium-sulfur batteries have been experimentally applied in many environments such as load balancing, emergency power supply and uninterruptible power supply in European and American countries, as well as in many industries such as industrial, commercial and wind power generation systems, but it is still in the exploratory stage in China. [0...

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Problems solved by technology

As an energy storage system, sodium-sulfur batteries have been experimentally applied in many environments such as load balancing, emergency power supply and uninterruptible power supply in European and American countries, as well as in many industries such as industrial, commercial and wind power generation systems, but it is still in the exploratory stage in China

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