Electronic power converter

Abstract

The invention discloses an electronic power converter. The converter comprises a transmission mechanism and a double-fed motor, the left end of the transmission mechanism is connected with a wind machine through rotating shafts, the output end of the transmission mechanism is connected with the double-fed motor through control wires, and the signal end of the double-fed motor is connected to power grids through power windings, wherein the output end of the double-fed motor is connected with PWM rectifiers through control windings, and the PWM rectifiers are connected with the power grids in a series-parallel connection structure; the double-fed motor adopts a wound-rotor asynchronous generator and is provided with stator windings on the left end, the right end of the double-fed motor is connected with resistors and stabilivolts through the stator windings separately, and the control ends of the stabilivolts are in parallel connection with the rectifiers, so that the volume of a relative total-power converter is greatly reduced, the reliability of system operation is improved, and the technical scheme of the electronic power converter can serve as an optimum proposal for variable-speed constant-frequency power generation in wind power generation.

Description

technical field [0001] The invention relates to the technical field of converters, in particular to a power electronic converter. Background technique [0002] With the development of the economy, the awareness of environmental protection is constantly increasing, and the development and utilization of various types of renewable energy represented by wind energy has become a strategic choice for human beings to solve the problem of survival. Wind power technology is currently one of the most mature renewable energy power generation technologies, and it is also a new energy power generation technology that many countries focus on developing: [0003] (1) The current wind power technology is realized by constant speed and constant frequency units, but the constant speed and constant frequency units can only achieve the highest operating efficiency when they are fixed at a certain speed. When the wind speed changes, the wind turbine will deviate from the optimal operating speed...

AI Technical Summary

Problems solved by technology

[0003] (1) The current wind power technology is realized by constant speed and constant frequency units, but the constant speed and constant frequency units can only achieve the highest operating efficiency when they are fixed at a certain speed. When the wind speed changes, the wind turbine will deviate from the optimal operating speed. lead to a decrease in operating efficiency

The power quality output by the asynchronous wind turbine is relatively poor, and the power factor is low;

[0004] (2) In the existing technical scheme, the adjustment of the operating state of each wind turbine will have a great impact on the local power grid, and the randomness and instability of wind speed and wind direction will cause changes in the output voltage, frequency, and power of the wind turbine

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