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Direct driving wind power generation system based on double SVPWM current mode convertor and control method thereof

A wind power generation system, current-type technology, applied in the direction of motor generator control, electronic commutation motor control, wind power generation, etc., can solve the problems that cannot be directly controlled by current-type converter logic, achieve convenient optimization selection, improve operation Efficiency, system cost reduction effects

Inactive Publication Date: 2011-03-02
HEFEI UNIV OF TECH
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  • Claims
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Problems solved by technology

For the current-type converter, because its control logic is different from that of the voltage-type converter, for example, the control of the zero vector is realized by the direct connection of the switch tube of the same bridge arm, so the space vector pulse width modulation (SVPWM) control for the voltage-type converter The pulse signal cannot be directly used for the logic control of the main circuit switch tube of the current source converter

Method used

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  • Direct driving wind power generation system based on double SVPWM current mode convertor and control method thereof
  • Direct driving wind power generation system based on double SVPWM current mode convertor and control method thereof
  • Direct driving wind power generation system based on double SVPWM current mode convertor and control method thereof

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Embodiment Construction

[0025] Such as figure 1 As shown, the permanent magnet synchronous generator M1 is coaxially connected with the wind turbine M2 to form a direct-drive wind power generation system. When the wind speed reaches the system cut-in wind speed, driven by the wind turbine M2, the permanent magnet synchronous generator outputs the AC current i a , i b and i c ,Such as figure 2 (a) shown. The stator AC current signal output terminal of the permanent magnet synchronous generator M1 is connected in series with a three-phase current-type fully-controlled rectifier composed of an insulated gate power switch tube IGBT T11-T16 and a fast recovery power diode D11-D16 for rectification to obtain a DC current I dc ,Such as figure 2 As shown in (b), the DC power supply is connected in series with the three-phase current-mode grid-connected inverter composed of fully-controlled insulated gate power switch tubes IGBT T21-T26 and fast recovery power diodes D21-D26; the role of the DC inducta...

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Abstract

The invention discloses a direct driving wind power generation system based on a double SVPWM current mode convertor and a control method thereof. The system is characterized in that a permanent magnet synchro generator M1 is coaxially connected to a wind turbine M2; a stator alternated current signal output end of the permanent magnet synchro generator M1 is serially connected to a three-phase current fully controlled rectifier, a direct current inductor and a three-phase current synchronization inverter; and the fully controlled power switching tubes forming the three-phase current fully controlled rectifier and the three-phase current fully controlled inverter are fully controlled elements which respectively control with PWM11-PWM16 and PWM21-PWM26 space vector pulse width modulation signals SVPWM. The invention can simultaneously realize the variable speed control of the permanent magnet synchro generator and the synchronization control of the power grid.

Description

technical field [0001] The invention relates to an electric energy conversion system and a control method applied in a large-scale wind power generation system. Background technique [0002] From a technical point of view, converters can be divided into two types: voltage source type and current source type. In the current market, two-level voltage source converters dominate wind power system applications due to low cost and modular design. However, as the capacity of the wind power generation system increases, the use of a 690V two-level voltage source converter system will make the output current of the converter too large, which will result in very expensive cables from the generator axle to the ground. If the grid-connected power generation is realized after step-up and voltage regulation conversion, this will inevitably increase the cost and complexity of the system. The current-type grid-connected inverter just makes up for the deficiency of the voltage-type grid-con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02P21/06H02P9/30
CPCY02E10/763Y02E10/76
Inventor 茆美琴苏建徽丁明张国荣张健杜燕汪海宁
Owner HEFEI UNIV OF TECH
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