Reconfigurable power inverter for direct drive type permanent-magnet synchronous generating system

Abstract

The invention belongs to the field of direct drive type permanent-magnet synchronous wind power/wave power generation and power electronics control and relates to a power inverter for a reconfigurable direct drive type permanent-magnet synchronous generating system, comprising a three-phase bridge diode rectifier circuit, a motor side reconfigurable control circuit, a Buck-Boost direct current control circuit, a network side reconfigurable control circuit and an inverter circuit which are sequentially connected, wherein the motor side reconfigurable control circuit comprises three bidirectional controllable diodes and two redundant rectifier diode bridge arms, motor sides of the three bidirectional controllable diodes are connected in parallel, the two redundant rectifier diode bridge arms are connected in series, the network side reconfigurable control circuit comprises two redundant MOSFET (Metal Oxide Semiconductor Field Effect Transistor)/IGBT (Insulated Gate Bipolar Translator) bridge arms and three bidirectional controllable diodes, the two redundant MOSFET/IGBT bridge arms are connected in series and are then connected with the output end of the Buck-Boost direct current control circuit, and network sides of the three bidirectional controllable diodes are connected in parallel. The power inverter can lower the control complexity of the motor sides and can also fulfill the functions of self-adaptation voltage boosting and depressing.

Description

technical field [0001] The invention belongs to the field of direct-drive permanent magnet synchronous wind / wave power generation and power electronic control, and in particular relates to an AC-DC-AC power converter. Background technique [0002] Environmental pollution and energy crisis are two common problems facing all mankind today. Vigorously developing new energy sources such as solar energy, wind energy, and ocean energy, and realizing the change of energy conversion mode and the improvement of utilization rate are an important means to solve these two problems. It has significant economic and social benefits. Wind power and wave power are key renewable energy sources that are suitable for my country's national conditions and can be vigorously developed. Their technical requirements have been included in the national science and technology development plan. So far, according to the different wind / wave power generators, wind power generators can be divided into: syn...

AI Technical Summary

Problems solved by technology

In traditional AC-DC-AC converters for wind power / wave power generation, the power converters on the motor side and the grid side are generally controllable, and the control is relatively complicated. The intermediate DC link generally uses capacitors as energy storage, and there is no self-adaptation The step-up and step-down function, which cannot meet the characteristics of wind / wave force changes

At the same time, general systems do not have reconfigurable functions and auxiliary low-voltage drop protection circuits

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