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Double-rotor variable speed and frequency conversion wind power generation exciting method and control system thereof

An excitation method and excitation control technology, applied in the control of wind turbines, control systems, wind power generation, etc., can solve problems such as frequent gearbox failures, low unit efficiency, and poor working conditions of wind turbine units

Inactive Publication Date: 2007-06-06
天津市新源电气科技有限公司
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AI Technical Summary

Problems solved by technology

[0004] It is known that wind turbines transmit the power generated by the wind wheel under the action of wind to the generator through the gearbox and make it obtain a corresponding speed; usually the speed of the wind wheel is very low, far below the requirements for high-speed generator power generation The speed must be realized through the acceleration of the gear pair of the gearbox; and the working conditions of the wind turbine unit are generally very poor, and frequent failures of the gearbox are common.
[0005] Products manufactured by conventional technologies have poor reliability, high maintenance costs, and low unit efficiency

Method used

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  • Double-rotor variable speed and frequency conversion wind power generation exciting method and control system thereof
  • Double-rotor variable speed and frequency conversion wind power generation exciting method and control system thereof
  • Double-rotor variable speed and frequency conversion wind power generation exciting method and control system thereof

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Embodiment Construction

[0044] The specific implementation, structure, features and effects provided by the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0045] As shown in Figures 1-4, a dual-rotor variable-speed variable-frequency wind motor M includes a generator main body 1 fixed on a base 10, a generator stator 16 fixed in a motor casing 111, and a generator rotor 14 passing through the main body. The drive shaft 13 is configured to rotate relative to the stator 16, wherein,

[0046] The exciter 4 is coaxially installed in the casing through the main transmission shaft and the main body of the generator; the permanent magnet 43 is installed on the yoke 42 in the permanent magnet outer rotor housing 410 to form the permanent magnet outer rotor 41 of the exciter. The permanent magnet outer rotor is set in a structure that is relatively rotating with the exciter inner rotor 45 through the connecting piece 46; the perma...

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Abstract

A exciting control system of wind-driven generator is prepared as setting wind master wheel with stator on master driving shaft of wind motor and setting wind sub-wheel used for driving permanent magnet external rotor on sub-driving shaft of wind motor, utilizing double-rotor structure of brushless double-feed motor rotor and rotary permanent magnet external rotor to realizing variable speed and variable frequency operation of generator set for reducing half of generator number of pole-pair comparing to the same capacity generator with single rotor.

Description

technical field [0001] The invention relates to a wind power generator, in particular to an excitation control system and an excitation control mode of a double-rotor wind generator with series permanent magnet variable-speed variable-frequency excitation excitation. Background technique [0002] The known technology such as Chinese patent CN200510022771.1 discloses a variable speed and frequency conversion method for wind power generation. The input shaft of the magneto is divided or merged by the differential mechanism of the differential permanent magnet motor to generate power flow into the stator winding of the differential permanent magnet motor and through the feeder to the power grid to achieve constant speed variable frequency power generation to improve the power generation efficiency of the power generation system . [0003] Another example is Chinese patent CN200410003089.3 which discloses a MW level direct drive permanent magnet outer r...

Claims

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Application Information

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IPC IPC(8): H02P9/04H02P9/14H02J3/38H02J3/40H02K16/00H02K7/10H02K21/12H02K1/27H02K7/18F03D1/02F03D7/02
CPCY02E10/763Y02E10/76
Inventor 王华君
Owner 天津市新源电气科技有限公司
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