阅读说明：本技术 基于激光测风的串联式双叶轮风力发电机组共振穿越方法 (Laser wind measurement-based resonance crossing method for series connection type double-impeller wind generating set ) 是由 房方 张会广 刘亚娟 胡阳 张文广 于 2021-07-13 设计创作，主要内容包括：本发明涉及一种基于激光测风的串联式双叶轮风力发电机组共振穿越方法,包括：控制系统采集前叶轮和后叶轮的转速、风速风向、功率、转矩和桨叶角度信息；通过激光测风系统采集机舱前方一段距离处的风速风向,存入数据存储单元；前后叶轮能量预测分配模块分别计算出前叶轮和后叶轮获取的能量,并分别传给前后叶轮预测最大最小功率模块,计算出各自获取的能量区间；前后叶轮预测最大最小功率模块把前叶轮和后叶轮的预测最大最小功率分别传给前后叶轮控制模块,前后叶轮控制模块分别获取预测最大最小功率后,根据前叶轮、后叶轮的运行区间和预测最大最小功率进行转速-转矩调节。本发明为双叶轮机组运行稳定性和提供机组的发电量提供技术基础。(The invention relates to a laser wind measurement-based resonance crossing method for a series connection type double-impeller wind generating set, which comprises the following steps: the control system collects the information of the rotating speed, the wind speed and the wind direction, the power, the torque and the blade angle of the front impeller and the rear impeller; acquiring the wind speed and the wind direction at a distance in front of the cabin through a laser wind measuring system, and storing the wind speed and the wind direction in a data storage unit; the front impeller energy prediction and distribution module and the rear impeller energy prediction and distribution module respectively calculate the energy acquired by the front impeller and the rear impeller, respectively transmit the energy to the front impeller and the rear impeller maximum power prediction module and calculate the energy interval acquired by the front impeller and the rear impeller; the front impeller and the rear impeller forecast maximum and minimum power modules respectively transmit the forecast maximum and minimum powers of the front impeller and the rear impeller to the front impeller and the rear impeller control modules, and after the front impeller and the rear impeller control modules respectively obtain the forecast maximum and minimum powers, rotation speed-torque adjustment is carried out according to the operation intervals of the front impeller and the rear impeller and the forecast maximum and minimum powers. The invention provides a technical basis for the operation stability of the double-impeller unit and the generated energy of the unit.)

1. A resonance crossing method of a series connection type double-impeller wind generating set based on laser wind measurement is characterized by comprising the following steps:

step 1, a control system collects the information of the rotating speed, the wind speed and the wind direction, the power, the torque and the blade angle of a front impeller and a rear impeller;

step 2, acquiring the wind speed and the wind direction at a distance in front of the engine room through a laser wind measuring system, storing the wind speed and the wind direction in a data storage unit, and calculating the power of the unit for a period of time in the future by an energy calculating unit;

step 3, the front impeller energy prediction distribution module and the rear impeller energy prediction distribution module respectively calculate the energy obtained by the front impeller and the rear impeller, respectively transmit the energy to the front impeller maximum power prediction module and the rear impeller maximum power prediction module, and calculate the energy intervals obtained by the front impeller and the rear impeller;

and 4, respectively transmitting the predicted maximum and minimum powers of the front impeller and the rear impeller to a front impeller control module and a rear impeller control module by the front impeller predicted maximum and minimum power module and the rear impeller predicted maximum and minimum power module, respectively obtaining the predicted maximum and minimum powers of the front impeller and the rear impeller by the front impeller control module and the rear impeller control module, and then adjusting the rotating speed and the torque according to the operating intervals and the predicted maximum and minimum powers of the front impeller and the rear impeller.

2. The laser wind measurement-based series connection type double-impeller wind generating set resonance traversing method according to claim 1, characterized in that: in step 4, if the current impeller runs on an interval Ab-Bb-Cb-Db of a front impeller rotating speed-torque target curve, and the predicted maximum power exceeds the power calculated by the Fb point, a crossing command is sent; if the predicted maximum power is not greater than the power calculated at the Fb point, maintaining the existing speed-torque target curve; if the current impeller runs in an interval Eb-Fb-Gb-Hb of a front impeller rotating speed-torque target curve, and the predicted minimum power is smaller than the power calculated at the Cb point, a ride-through command is sent; maintaining the existing speed-torque target curve if the predicted minimum power is not less than the power calculated at the Cb point; the logic of the rear impeller control module is consistent with that of the front impeller control module.

3. The laser wind measurement-based series connection type double-impeller wind generating set resonance traversing method according to claim 2, wherein a front impeller rotating speed-torque target curve is divided into three intervals: an Ab-Bb-Cb-Db interval, a rotating speed isolation area and an Eb-Fb-Gb-Hb interval.

4. The laser wind measurement-based series connection type double-impeller wind generating set resonance traversing method according to claim 3, wherein: at the time Ab-Bb-Cb-Db interval Ab is: the minimum speed set point is S1b, the point where the torque command minimum is located; the point Bb is: the minimum speed set point is S1b, the point where the torque command maximum is located; the points Cb are: the maximum speed set point is S2, the point where the torque command minimum value is located; the point Db is: the maximum speed set point is S2, the point at which the torque command maximum is located; in the interval Eb-Fb-Gb-Hb, the point Eb is: the minimum speed set point is S4, the point at which the torque command minimum is located; the point Fb is: the minimum speed set point is S4, the point at which the torque command maximum is located; the dots Gb are: the maximum speed set point is S5b, the point where the torque command minimum is located; point Hb is: the maximum speed set point is S5b, the point at which the torque command maximum is located; s1b is a minimum grid-connected rotating speed set point, S2 is a rotating speed isolation region lower limit rotating speed set point, S4 is a rotating speed isolation region upper limit rotating speed set point, and S5b is a rated rotating speed set point.

5. The laser wind measurement-based series connection type double-impeller wind generating set resonance traversing method according to claim 1, characterized in that: the distance of step 2 is 100 meters.

Technical Field

The invention relates to a laser wind measurement-based resonance crossing method for a series-connection type double-impeller wind generating set.

Background

At present, the mainstream wind generating sets are single-impeller wind generating sets and comprise impellers, a variable pitch system, a gear box, a power transmission device, a generator, a power adjusting device and control and monitoring software. Due to the evaluation of the internet surfing pressure, research on efficient wind energy conversion wind generating sets is urgently needed. The double-impeller wind generating set has high-efficiency wind energy capturing capacity, but the frequency characteristic is more complex than that of a single-impeller wind generating set, resonance is avoided, and meanwhile, a control strategy capable of reducing the loss of generated energy is a technology which needs to be researched urgently at present.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a laser wind measurement-based resonance crossing method for a series-type double-impeller wind generating set, which can improve the safety and the wind capturing capacity of the wind generating set.

In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:

a resonance crossing method of a series connection type double-impeller wind generating set based on laser wind measurement comprises the following steps:

1. the control system collects the information of the rotating speed, the wind speed and the wind direction, the power, the torque and the blade angle of the front impeller and the rear impeller.

2. The wind speed and the wind direction at a distance in front of the engine room are collected through the laser wind measuring system and stored in the data storage unit, and the power of the unit in a period of time in the future is calculated through the energy calculating unit.

3. The front impeller energy prediction distribution module and the rear impeller energy prediction distribution module respectively calculate the energy acquired by the front impeller and the rear impeller, respectively transmit the energy to the front impeller maximum power prediction module and the rear impeller maximum power prediction module, and calculate the energy intervals acquired respectively.

4. The front impeller predicted maximum and minimum power module and the rear impeller predicted maximum and minimum power module respectively transmit the predicted maximum and minimum power of the front impeller and the predicted maximum and minimum power of the rear impeller to the front impeller control module and the rear impeller control module, and after the front impeller control module and the rear impeller control module respectively obtain the predicted maximum and minimum power of the front impeller and the predicted maximum and minimum power of the rear impeller, rotation speed-torque adjustment is carried out according to the operation intervals of the front impeller and the rear impeller and the predicted maximum and minimum power.

On the basis of the scheme, in step 4, if the current impeller runs on the interval Ab-Bb-Cb-Db of the previous impeller rotating speed-torque target curve, the predicted maximum power exceeds the power calculated by the Fb point, and then a cross-over command is sent. If the predicted maximum power is not greater than the power calculated at the Fb point, maintaining the existing speed-torque target curve; and if the current impeller runs on the section Eb-Fb-Gb-Hb of the previous impeller rotating speed-torque target curve, and the predicted minimum power is less than the power calculated at the Cb point, sending a ride-through command. Maintaining the existing speed-torque target curve if the predicted minimum power is not less than the power calculated at the Cb point; the logic of the rear impeller control module is consistent with that of the front impeller control module.

On the basis of the scheme, S1b is a minimum grid-connected rotating speed set point, S2 is a rotating speed isolation region lower limit rotating speed set point, S4 is a rotating speed isolation region upper limit rotating speed set point, and S5b is a rated rotating speed set point; in the interval Ab-Bb-Cb-Db, the points Ab are: the minimum speed set point is S1b, the point where the torque command minimum is located; the point Bb is: the minimum speed set point is S1b, the point where the torque command maximum is located; the points Cb are: the maximum speed set point is S2, the point where the torque command minimum value is located; the point Db is: the maximum speed set point is S2, the point at which the torque command is at a maximum. In the interval Eb-Fb-Gb-Hb, the point Eb is: the minimum speed set point is S4, the point at which the torque command minimum is located; the point Fb is: the minimum speed set point is S4, the point at which the torque command maximum is located; the dots Gb are: the maximum speed set point is S5b, the point where the torque command minimum is located; point Hb is: the maximum speed set point is S5b, the point at which the torque command is at a maximum.

On the basis of the scheme, a front impeller rotating speed-torque target curve is divided into three intervals: an Ab-Bb-Cb-Db interval, a rotating speed isolation area and an Eb-Fb-Gb-Hb interval.

On the basis of the scheme, the distance of the step 2 is 100 meters.

The invention has the beneficial effects that:

the invention can realize the resonance crossing of the tandem type double-impeller wind generating set based on laser wind measurement, and provides a technical basis for the operation stability of the double-impeller wind generating set and the generating capacity of the set.

Drawings

The invention has the following drawings:

FIG. 1: a front impeller rotational speed-torque target curve;

FIG. 2: a rear impeller speed-torque target curve;

FIG. 3: and (4) a control system block diagram.

Detailed Description

The present invention is described in further detail below with reference to figures 1-3.

The invention provides a laser wind measurement-based resonance crossing method for a series-connection type double-impeller wind generating set, which relates to a wind generating set and comprises the following steps:

wind front and rear turbines, i.e. front and rear impellers;

a tower;

related equipment such as a transmission chain system, a power generation system, a yaw system, a brake system and the like;

the sensor system comprises a laser wind measuring system, a generator rotating speed front impeller sensor, a generator rotating speed rear impeller sensor, a generator power front impeller sensor, a generator power rear impeller sensor, a generator torque measuring front impeller device, a generator torque measuring rear impeller device and a generatorCabin vibration sensors, etc.;

the control system comprises an input/output module, a controller, a communication interface module, a communication bus and other control related equipment.

The wind generating set is a series connection type double-impeller wind generating set. If the tower frequency is in the frequency doubling range of 1, resonance may occur at a particular rotational speed. FIG. 1 is a front impeller speed-torque target curve divided into three parts: Ab-Bb-Cb-Db, Eb-Fb-Gb-Hb and a rotating speed isolation area. Qub is the rated torque of the unit, Qdb is the highest torque of the unit operation interval Ab-Bb-Cb-Db. S3 is the resonance rotation speed point. [ S2S 4] is a rotational speed isolation region. S1b is a minimum grid-connected rotating speed set point, S2 is a rotating speed isolation region lower limit rotating speed set point, S4 is a rotating speed isolation region upper limit rotating speed set point, and S5b is a rated rotating speed set point. If the unit operates in the interval Ab-Bb-Cb-Db and the torque exceeds Qdb times of 0.95, the unit rotating speed operation target curve gradually transits to Eb-Fb-Gb-Hb according to a certain slope. If the unit operates in the interval Eb-Fb-Gb-Hb and the torque is smaller than the set torque, the rotating speed operation target curve of the unit gradually transits to Ab-Bb-Cb-Db according to a certain slope. Fig. 2 is a rear impeller speed-torque curve, the operating rule of which is the same as that of fig. 1.

The invention provides a resonance crossing method of a series connection type double-impeller wind generating set based on laser wind measurement for solving the problems. The specific implementation is shown in fig. 3. The control system collects information such as the rotating speed, the wind speed and the wind direction of the two impellers, the power generated by the two impellers, the blade angle and the like. The wind speed (100 m is adjustable) at the position 100 m in front of the cabin is collected through a laser wind measuring system and stored in a data storage unit, and the power of the unit in the future period of time is calculated through an energy calculating unit. The energy prediction and distribution module of the front impeller and the rear impeller calculates the energy obtained by the front impeller and the rear impeller, respectively transmits the energy to the maximum power prediction module of the front impeller and the maximum power prediction module of the rear impeller, and calculates the energy interval obtained by the energy prediction and distribution module of the front impeller and the rear impeller. And finally, transmitting the predicted maximum and minimum powers of the front impeller and the rear impeller to respective impeller control modules.

After the front impeller control module obtains the predicted maximum and minimum power of the front impeller, if the current impeller runs on an interval Ab-Bb-Cb-Db of a front impeller rotating speed-torque target curve, the predicted maximum power exceeds the power calculated by the Fb point, and then a crossing instruction is sent. If the predicted maximum power is not greater than the power calculated at the Fb point, maintaining the existing speed-torque target curve; and if the current impeller runs on the section Eb-Fb-Gb-Hb of the previous impeller rotating speed-torque target curve, and the predicted minimum power is less than the power calculated at the Cb point, sending a ride-through command. Maintaining the existing speed-torque target curve if the predicted minimum power is not less than the power calculated at the Cb point; in the operating interval Ab-Bb-Cb-Db, the points Ab are: the minimum speed set point is S1b, the point where the torque command minimum is located; the point Bb is: the minimum speed set point is S1b, the point where the torque command maximum is located; the points Cb are: the maximum speed set point is S2, the point where the torque command minimum value is located; the point Db is: the maximum speed set point is S2, the point at which the torque command is at a maximum. In the operating interval Eb-Fb-Gb-Hb, the point Eb is: the minimum speed set point is S4, the point at which the torque command minimum is located; the point Fb is: the minimum speed set point is S4, the point at which the torque command maximum is located; the dots Gb are: the maximum speed set point is S5b, the point where the torque command minimum is located; point Hb is: the maximum speed set point is S5b, the point at which the torque command is at a maximum. The logic of the rear impeller control module is consistent with that of the front impeller control module. Other algorithm modules of the front impeller control and the rear impeller control are not in the invention and are not described in detail.

The above embodiments are merely illustrative, and not restrictive, and those skilled in the relevant art can make various changes and modifications without departing from the spirit and scope of the invention, and therefore all equivalent technical solutions also belong to the scope of the invention.

Those not described in detail in this specification are within the skill of the art.