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

A technology of power converter and permanent magnet synchronization, which is applied in the direction of conversion equipment for intermediate conversion to DC, conversion device for converting AC power input into AC power output, output power, etc. , No reconfigurable function, no step-up and step-down function, etc., to achieve the effect of improving low-voltage ride-through capability, ensuring voltage, and simple control

Active Publication Date: 2011-04-06
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment Construction

[0016] figure 1 It is a schematic diagram of a direct-drive wind / wave permanent magnet synchronous power generation system, in which 3 can use the power converter of the present invention. figure 2 Schematic diagram of the reconfigurable direct-drive permanent magnet synchronous wind / wave power generation AC-DC-AC power converter proposed for the present invention. As shown in the figure, the power converter mainly includes: a rectifier circuit, which is responsible for converting three-phase AC power into DC power; a reconfigurable control circuit on the motor side, which is mainly used for faults in one of the three branches of the rectifier circuit ( Mainly open-circuit faults) and low-voltage drop faults in the system to maintain the normal operation of the system; Buck-Boost DC control circuit is used to realize the adaptive control of DC voltage; the inverter circuit is responsible for converting DC to AC; the grid side can The reconfiguration control circuit is mainly...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/44H02M5/48
Inventor 方红伟夏长亮肖朝霞史婷娜
Owner TIANJIN UNIV
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