Modularized structure for three-level inverter for wind power generation

Abstract

The invention discloses a modularized structure for a three-level inverter for wind power generation, which can simply and quickly form different power levels for wind power generation. The modularized structure comprises an electrical system and a radiating system, wherein the electrical system comprises four direct current capacitors, four IGBTs (Insulated Gate Bipolar Translators), two clamping diodes, two absorption capacitors, a balancing resistor and bus bars; the radiating system comprises a water-cooling base plate and an air water-heat exchanger; a cooling water channel is arranged inside the water cooling base plate; and a water inlet and a water outlet which are connected with the air water-heat exchanger are arranged on in the lower end surface of the water-cooling base plate; the bus bars comprise a direct current capacitor bus bar which is arranged above the water-cooling base plate and a converter loop bus bar which is vertically connected with the direct-current capacitor bus bar, and arranged in front of the water-cooling base plate in parallel; the four direct current capacitors are arranged below the direct current capacitor bus bar, and the wiring terminals of the four direct current capacitors are connected with the direct current capacitor bus bar; the four IGBTs and the two clamping diodes are fixedly arranged on the water-cooling base plate; and the wiring terminals of the four IGBTs and the two clamping diodes and the wiring terminal of the balancing resistor are connected with the converter loop bus bar.

Description

technical field [0001] The invention relates to a power device, in particular to a modular structure of a three-level converter for wind power generation. Background technique [0002] With the development and progress of wind power generation technology, out of economical considerations, the capacity of the current single wind power unit is getting higher and higher, so the power of the converter driving the wind power generator is also getting higher and higher. At the same time, in order to improve the efficiency of the whole system and reduce the heat loss of the system, the high-power wind power generation system tends to adopt the voltage level of medium and high voltage. In view of the current development level of power electronic devices, if the two-level topology continues to be used, multiple power electronic devices need to be connected in series in medium and high voltage applications, and it is difficult to solve the static and dynamic voltage equalization probl...

AI Technical Summary

Problems solved by technology

In view of the current development level of power electronic devices, if the two-level topology continues to be used, multiple power electronic devices need to be connected in series in medium and high voltage applications, and it is difficult to solve the static and dynamic voltage equalization problems of series connected power electronic devices. thereby reducing the reliability of the entire system

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