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Direct drive wind turbine generator low-voltage ride-through control system based on three-level converter

A low-voltage ride-through and wind turbine technology, applied in wind power generation, single-network parallel feed arrangement, etc., to achieve the effects of low power consumption, short design cycle, and low development cost

Inactive Publication Date: 2014-02-05
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Each power tube bears only half of the DC side voltage;

Method used

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  • Direct drive wind turbine generator low-voltage ride-through control system based on three-level converter
  • Direct drive wind turbine generator low-voltage ride-through control system based on three-level converter
  • Direct drive wind turbine generator low-voltage ride-through control system based on three-level converter

Examples

Experimental program
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Embodiment

[0060] Embodiment: A low-voltage ride-through control system for direct-drive wind turbines based on three-level converters (see figure 1 ), characterized in that it includes a main circuit module, a control module and a data processing module; wherein the input of the main circuit module is connected to the output of the data processing module, and its output is connected to the input of the control module; the data The input terminal of the processing module receives the output signal of the control module.

[0061] The main circuit module (see figure 2 ) consists of a wind turbine, a permanent magnet direct drive generator, a flying capacitor type three-capacitor rectifier, Boost chopper boost power and a flying capacitor type three capacitor inverter; wherein the wind turbine, permanent magnet direct drive generator, The flying capacitor type three-capacitor rectifier, the Boost chopper boost power and the flying capacitor type three capacitor inverter are sequentially ...

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PUM

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Abstract

A direct drive wind turbine generator low-voltage ride-through control system based on a three-level converter is characterized by comprising a main circuit module, a control module and a data processing module. The system has the advantages that the converter has a high freedom degree and high flexibility so that the function of protecting power devices can be achieved, and both active power and reactive power can be controlled. The system can well finish direct drive wind turbine generator low-voltage ride-through control on the basis of the flying capacitive type three-level converter.

Description

(1) Technical field: [0001] The patent of the present invention relates to the technical field of low-voltage ride-through control, and is a low-voltage ride-through control system for direct-drive wind turbines based on three-level converters. (2) Background technology: [0002] Wind energy is a pollution-free, renewable energy. Wind power will occupy an increasingly important position in the future energy structure, and wind power technology has become a research hotspot in various countries. The speed matching between the fan and the generator is a key issue. Generally, the fan and generator operating at low speed need to be connected through a speed-up gearbox. Large-capacity gearboxes are expensive, have a high failure rate, and are difficult to maintain, so the existence of gearboxes has become a bottleneck for the further development of wind power generation systems. The direct-drive wind power generation system uses wind turbines to directly drive multi-pole low-sp...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCY02E10/763Y02E10/76
Inventor 刘少宇马幼捷张禹周雪松高明杰高峰王银明徐明王平赵希辉郑宇清
Owner STATE GRID CORP OF CHINA