阅读说明：本技术 一种风电机组自驱动风轮盘车装置及方法 (Self-driven wind wheel turning device and method for wind turbine generator ) 是由 蔡梅园 周祖田 陈寒露 聂思宇 张万军 柯余东 于 2020-06-15 设计创作，主要内容包括：本发明提供一种风电机组自驱动风轮盘车装置,包括依顺次相连接的变压器、变流器、发电机、传动链、风轮和主控系统；变流器中包括点动控制模块,点动控制模块用于读取发电机参数,还用于控制发电机点动工作；本发明还提供了风电机组自驱动风轮盘车方法,包括以下步骤：风电机组停机顺桨；变流器读取发电机参数,调整变流器输出控制发电机启动转速；变流器控制发电机以点动工作的模式运行,带动风轮间断性旋转；多次点动启动发电机,使风轮旋转逐渐靠近锁紧位置；当风轮转动到锁紧位置时,将风轮锁紧销插入风轮锁紧盘定位孔中；本发明可以解决使用变流器驱动发电机进行盘车时,对工作人员操作容错性较差、安全性不高的技术问题。(The invention provides a self-driven wind wheel turning gear of a wind turbine generator, which comprises a transformer, a converter, a generator, a transmission chain, a wind wheel and a master control system which are connected in sequence; the converter comprises a joggling control module which is used for reading generator parameters and controlling the generator to work in a joggling manner; the invention also provides a wind turbine generator self-driven wind wheel turning method, which comprises the following steps: stopping the wind turbine generator to feather; the converter reads generator parameters and adjusts the output of the converter to control the starting rotating speed of the generator; the converter controls the generator to operate in a inching working mode to drive the wind wheel to rotate discontinuously; the generator is started by inching for multiple times, so that the wind wheel rotates to gradually approach the locking position; when the wind wheel rotates to the locking position, the wind wheel locking pin is inserted into the wind wheel locking disc positioning hole; the invention can solve the technical problems of poor fault tolerance and low safety of the operation of workers when the converter is used for driving the generator to drive the vehicle.)

1. The utility model provides a wind turbine generator system self-driven wind wheel barring gear, includes transformer, converter, generator, driving chain, wind wheel and the major control system that the order was connected, its characterized in that: the converter comprises a joggling control module, and the joggling control module is used for reading the generator parameters and controlling the generator to work in a joggling mode.

2. An apparatus according to claim 1, characterized in that: the mode that the inching control module controls the generator to inching work comprises the setting of the rotation number of turns of a single-start generator and the single-start time.

3. An apparatus according to claim 1, characterized in that: the anti-misoperation system further comprises an anti-misoperation controller, wherein the anti-misoperation controller is used for controlling the inching control module to receive the instruction.

4. A device according to claim 1 or 3, characterized in that: the wind turbine generator set comprises a full-power converter wind turbine generator set and a double-fed wind turbine generator set.

5. An apparatus according to claim 4, characterized in that: the converter of the double-fed wind turbine generator set comprises a stator short-circuit contactor, and the stator short-circuit contactor is connected with a grid-connected contactor in the converter.

6. A wind turbine generator self-driven wind wheel turning method, characterized in that the device of any one of claims 1-5 is used for turning the wind wheel, comprising the following steps:

stopping the wind turbine generator to feather;

the inching control module of the converter reads generator parameters, adjusts the output of the converter according to the generator parameters and controls the starting rotating speed of the generator;

the inching control module of the converter controls the generator to operate in an inching working mode, so that the rotor of the generator intermittently rotates, and the rotor of the generator drives the wind wheel to intermittently rotate through the transmission chain;

the generator is started by inching for multiple times, so that the wind wheel rotates to gradually approach the locking position;

when the wind wheel rotates to the locking position, the wind wheel locking pin is inserted into the wind wheel locking disc positioning hole.

7. A method according to claim 6, characterized in that: before the inching control module of the converter reads the generator parameters, the method further comprises the step of using a misoperation prevention controller to control the inching control module of the converter to receive commands.

8. A method according to claim 6 or 7, characterized in that: the wind turbine generator is a full-power converter wind turbine generator, and the converter controls the motor by using a voltage space vector control technology.

9. A method according to claim 6 or 7, characterized in that: the wind turbine generator is a double-fed wind turbine generator, and the converter controls the motor by using a scalar control method.

Technical Field

The invention relates to the technical field of wind power generation, in particular to a self-driven wind wheel turning device and method for a wind turbine generator.

Background

Wind turbine generator system wind wheel barring means that when unit maintenance personnel got into the cabin or need get into wheel hub, in order to guarantee unit and personal safety, made the wind wheel slowly rotate through manual or machinery, electric method to the wind wheel locking pin can easily insert in wind wheel locking dish locating hole, prevented that wind turbine generator system wind wheel from rotating. At present, a large-scale wind turbine generator mostly realizes barring by manually barring a high-speed shaft brake disc, and when a wheel hub needs to be entered, a wind wheel locking disc positioning hole is often waited to be close to a wind wheel locking pin insertion hole by means of weak rotation of the wind wheel in a feathering state; only a small part of onshore large megawatt units and offshore units are additionally provided with special barring frequency converters and motors. The manual or mechanical method is time-consuming and labor-consuming, and the special barring gear is installed at a high cost and is inconvenient to popularize.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a wind turbine self-driven wind wheel turning device and a method thereof, and aims to solve the technical problems of poor operation fault tolerance and low safety of workers when a converter is used for driving a generator to turn in the prior art.

The technical scheme adopted by the invention is as follows:

in a first aspect, a wind turbine generator self-driven wind wheel turning gear is provided;

in a first implementation mode, the wind turbine self-driven wind wheel turning device comprises a transformer, a converter, a generator, a transmission chain, a wind wheel and a master control system which are connected in sequence; the converter comprises a joggling control module which is used for reading generator parameters and controlling the generator to work in a joggling mode.

In combination with the first implementable manner, in the second implementable manner, the manner in which the inching control module controls the generator to inching work includes setting the number of rotations of the single-start generator and the single-start time.

In combination with the first implementation manner, in a third implementation manner, the wind turbine generator self-driven wind wheel turning device further comprises a misoperation preventing controller, and the misoperation preventing controller is used for controlling the inching control module to receive the instruction.

With reference to the first or third implementable manner, in a fourth implementable manner, the wind turbine includes a full-power converter wind turbine and a doubly-fed wind turbine.

In combination with the fourth implementable manner, in the fifth implementable manner, the converter of the doubly-fed wind turbine generator set includes a stator short-circuit contactor, and the stator short-circuit contactor is connected with a grid-connected contactor in the converter.

In a second aspect, a method for turning a self-driven wind wheel of a wind turbine generator is provided;

in a sixth implementation manner, the wind turbine barring device is used for wind turbine barring by using the wind turbine generator self-driven wind turbine barring device in any one of the first to fifth implementation manners, and the wind turbine barring device comprises the following steps:

stopping the wind turbine generator to feather;

the inching control module of the converter reads generator parameters and adjusts the output of the converter according to the generator parameters to control the starting rotating speed of the generator;

the inching control module of the converter controls the generator to operate in an inching working mode, so that the rotor of the generator intermittently rotates, and the rotor of the generator drives the wind wheel to intermittently rotate through the transmission chain;

the generator is started by inching for multiple times, so that the wind wheel rotates to gradually approach the locking position;

when the wind wheel rotates to the locking position, the wind wheel locking pin is inserted into the wind wheel locking disc positioning hole.

With reference to the sixth implementable manner, in the seventh implementable manner, before the converter reads the generator parameter, the method further comprises controlling, using a malfunction prevention controller, reception of the command by the converter.

In combination with the sixth or seventh implementation manners, in an eighth implementation manner, the wind turbine is a full-power variable-current wind turbine, and the converter controls the motor by using a voltage space vector control technology.

In combination with the sixth or seventh implementable manner, in a ninth implementable manner, the wind turbine is a doubly-fed wind turbine, and the converter controls the motor by using a scalar control method.

According to the technical scheme, the beneficial technical effects of the invention are as follows:

1. according to the technical scheme in the embodiment, the converter and the generator of the wind turbine generator can be fully utilized, the original converter operates as a barring frequency converter, the original generator operates as a motor, the self-driven wind wheel slowly rotates, and self-barring is achieved. The generator is controlled to operate in a inching working mode through the inching control module in the self-turning process, and the fault tolerance of operation of workers can be improved. Meanwhile, the wind wheel rotates discontinuously instead of continuously, so that even if emergency braking is needed when an accident occurs in the barring process, processing time is reserved for workers, and the barring operation safety is improved.

2. For a full-power variable-current wind turbine generator, a current transformer controls a motor by using a Space Vector Pulse Width Modulation (SVPWM) technology; for the double-fed wind turbine generator, the converter controls the motor by using a scalar control technology; the effect of smooth control can be achieved.

3. Through the setting that prevents the maloperation controller, can effectually prevent staff's maloperation, improve the fault-tolerance to staff's operation, guarantee wind turbine generator system equipment safety and staff personal safety.

4. The stator short-circuit contactor is additionally arranged in the converter of the double-fed wind turbine generator, the stator short-circuit contactor is connected with the grid-connected contactor in the converter, electrical interlocking can be formed, under-voltage protection and voltage loss protection of a generator can be achieved, and safety in the turning process is further improved.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a block diagram of a system of a converter of the present invention installed in a nacelle.

Fig. 2 is a block diagram of an apparatus system in which the converter of the present invention is installed in a tower footing.

Fig. 3 is a flow chart of a method for turning the wind turbine generator into a self-driven wind wheel.

Fig. 4 is a block diagram of an apparatus system in which the converter is provided in the tower footing in embodiment 3 of the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.