Large-power 36-pulse wave oil-immersed high-voltage variable-frequency transformer

Abstract

The invention relates to a large-power 36-pulse wave oil-immersed high-voltage variable-frequency transformer. The large-power 36-pulse wave oil-immersed high-voltage variable-frequency transformer comprises two identical transformer bodies, wherein three net-side windings of each transformer body are distributed in a splitting manner in the axial direction, every two valve-side windings of the individual transformer body form a group, three groups of valve-side windings are distributed in a splitting manner in the axial direction, each valve-side winding group corresponds to one net-side winding and is distributed in a splitting manner in a radial direction with a corresponding net-side winding, the valve-side windings are separately connected with an input side of a corresponding power unit, two power units in a power unit group are mutually connected with each other in series at an output side, and the power unit groups are connected with each other in a planetary manner at the output side to form three phases of inlet wires of a high-voltage motor. The large-power 36-pulse wave oil-immersed high-voltage variable-frequency transformer has beneficial effects that by adopting more than or equal to two identical transformer bodies, the design workload is reduced, the material utilization rate is increased, and the machining process is simplified; and meanwhile, the ampere-turn imbalance problem in the transformer winding unit caused by a fault bypass of the power unit is solved.

Description

technical field [0001] The invention relates to a high-power 36-pulse oil-immersed high-voltage frequency conversion transformer. Background technique [0002] Inverter is the product of highly developed power electronics technology, microelectronics technology, motor control theory and automatic control technology. AC frequency conversion speed regulation is mainly used to control the speed and torque of asynchronous motors. It not only expands the speed adjustment range of the motor, enables the motor speed to change from zero speed to a range higher than the rated speed, but also has fast dynamic response and high work efficiency. High speed, good output characteristics, easy to use and other advantages that cannot be compared with other speed control schemes. Coupled with the advantages of strong adaptability to the environment, simple maintenance, low price, and easy realization of high speed and large capacity, AC motors have gradually replaced DC motors and become th...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a high-power 36-pulse oil-immersed high-voltage variable frequency transformer to solve the problem of low output power and low voltage of the variable frequency speed regulation system existing in the prior art and the power consumption of the variable frequency speed regulation system during operation. The series of problems caused by the unbalanced ampere-turn in the transformer winding unit caused by the fault bypass of the unit can ensure the same three-phase output power of the transformer, optimize the product structure, reduce the difficulty of design and processing and the height of the center of gravity of the transformer, and make the frequency conversion speed control device work in a wider range. Long-term safe and reliable operation within the speed regulation range, reducing energy consumption, and convenient transportation, installation and maintenance

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