Wind turbine generator coordinated control method and system
阅读说明：本技术 一种风电机组协调控制方法和系统 (Wind turbine generator coordinated control method and system ) 是由 李春阳 岳红轩 刘伟鹏 卢晓光 徐奉友 于 2019-10-11 设计创作，主要内容包括：本发明涉及一种风电机组协调控制方法和系统,包括：实时采集不同风电机组的运行数据,并判断所述运行数据是否异常；当某一风电机组的运行数据异常时,则根据异常的运行数据确定对应的控制指令,并将确定的控制指令下发给该风电机组；该风电机组根据收到的控制指令确定对应的控制参数进行控制,若该风电机组的运行数据恢复正常,则将确定的控制参数下发给后端风电机组以实现对后端风电机组的控制。本发明避免了当后端风电机组后续发生相同故障时再各自进行调节控制速度慢的问题,实现了对后端风电机组的前馈控制,提高了整场的风电机组安全性能。(The invention relates to a coordinated control method and a system for a wind turbine generator, which comprise the following steps: acquiring operation data of different wind turbine generators in real time, and judging whether the operation data is abnormal or not; when the operation data of a certain wind turbine generator is abnormal, determining a corresponding control instruction according to the abnormal operation data, and issuing the determined control instruction to the wind turbine generator; and the wind turbine generator determines corresponding control parameters according to the received control instructions to control, and if the operation data of the wind turbine generator is recovered to be normal, the determined control parameters are issued to the rear-end wind turbine generator to realize the control of the rear-end wind turbine generator. The invention avoids the problem that the speed of adjusting and controlling the rear-end wind turbine generators is slow when the rear-end wind turbine generators have the same fault in the following process, realizes the feedforward control of the rear-end wind turbine generators, and improves the safety performance of the whole wind turbine generators.)
1. A wind turbine generator coordinated control method is characterized by comprising the following steps:
acquiring operation data of different wind turbine generators in real time, and judging whether the operation data is abnormal or not;
when the operation data of a certain wind turbine generator is abnormal, determining a corresponding control instruction according to the abnormal operation data, and issuing the determined control instruction to the wind turbine generator;
and the wind turbine generator determines corresponding control parameters according to the received control instructions to control, and if the operation data of the wind turbine generator is recovered to be normal, the determined control parameters are issued to the rear-end wind turbine generator to realize the control of the rear-end wind turbine generator.
2. The wind turbine generator coordinated control method according to claim 1, further comprising: and if the operation data of the wind turbine generator is not recovered to be normal, adjusting the determined control parameters until the operation data of the wind turbine generator is recovered to be normal, and issuing the corresponding control parameters when the operation data of the wind turbine generator is recovered to be normal to the rear-end wind turbine generator so as to realize the control of the rear-end wind turbine generator.
3. The wind turbine generator coordinated control method according to claim 1 or 2, wherein the control instruction and the control parameter are sent to the wind turbine generator through a Powerlink optical fiber ring network.
4. The coordinated control method of wind turbine generators according to claim 1 or 2, wherein the control commands comprise yaw commands, pitch commands and engine torque commands.
5. The coordinated control system for the wind turbine generator is characterized by comprising a master station and wind turbine controllers, wherein the master station is in communication connection with each wind turbine controller;
the head station is configured to: acquiring operation data of different wind turbine generators in real time, and judging whether the operation data is abnormal or not; when the operation data of a certain wind turbine generator is abnormal, determining a corresponding control instruction according to the abnormal operation data, and sending the determined control instruction to a fan controller of the wind turbine generator;
the wind generating set controller is used for: and determining corresponding control parameters according to the received control instruction to control the wind turbine generator, and if the operation data of the wind turbine generator is recovered to be normal, issuing the determined control parameters to a fan controller of the rear-end wind turbine generator to realize the control of the rear-end wind turbine generator.
6. The coordinated wind turbine control system of claim 5, wherein the wind turbine controller is further configured to: and if the operation data of the wind turbine generator is not recovered to be normal, adjusting the determined control parameters until the operation data of the wind turbine generator is recovered to be normal, and transmitting the corresponding control parameters to the fan controller of the wind turbine generator when the operation data of the wind turbine generator is recovered to be normal.
7. The wind turbine generator system coordination control system according to claim 5 or 6, wherein the central station and each wind turbine controller are connected through Powerlink optical fiber ring network communication.
8. The coordinated wind turbine generator control system according to claim 5 or 6, wherein said control commands comprise yaw commands, pitch commands and engine torque commands.
Technical Field
The invention relates to a coordinated control method and system for a wind turbine generator, and belongs to the technical field of fan control.
Background
Wind power is a power generation form with cluster equipment characteristics, and wind power plants of ordinary scale in China are generally composed of at least dozens of wind turbine generator sets. The wind turbines are distributed in the wind power field at certain intervals. The wind conditions, terrain environments and the like of the wind turbines are similar and different to a certain extent; meanwhile, the running state, the fault type and the like of each unit also have a common point.
At present, the protection and operation control of the wind turbine mainly comprise two control modes, namely distributed control and centralized control. In the distributed control mode, each unit is provided with an independent protection and operation control system, so that the unit can be independently controlled, and the operation data and the operation condition of each fan can be sent to the monitoring background only through the Ethernet ring network of the wind field for storage or display. In the centralized control mode, the control master station performs centralized control on each unit according to the operation condition of each unit. For the existing centralized control mode, when the units have the same fault type, the control and adjustment speed is slow due to the fact that each unit needs to be adjusted and controlled, the requirement of real-time control of the units cannot be met, and the safety performance of the wind turbine generator in the whole plant is low.
Disclosure of Invention
The invention aims to provide a wind turbine generator coordinated control method and system, which are used for solving the problem that the safety performance of the wind turbine generator in the whole plant is low due to the fact that the existing wind turbine control mode is slow in adjustment speed.
In order to solve the technical problem, the invention provides a wind turbine generator coordination control method, which comprises the following steps:
acquiring operation data of different wind turbine generators in real time, and judging whether the operation data is abnormal or not;
when the operation data of a certain wind turbine generator is abnormal, determining a corresponding control instruction according to the abnormal operation data, and issuing the determined control instruction to the wind turbine generator;
and the wind turbine generator determines corresponding control parameters according to the received control instructions to control, and if the operation data of the wind turbine generator is recovered to be normal, the determined control parameters are issued to the rear-end wind turbine generator to realize the control of the rear-end wind turbine generator.
The invention has the beneficial effects that: when the operation data of a certain wind turbine generator is abnormal, the control parameters corresponding to the wind turbine generator are sent to the rear-end wind turbine generator, so that the rear-end wind turbine generator is controlled according to the received control parameters, the problem that the adjustment control speed is slow when the same fault occurs in the rear-end wind turbine generator subsequently is solved, the feedforward control of the rear-end wind turbine generator is realized, and the safety performance of the wind turbine generator in the whole plant is improved.
Further, in order to obtain accurate control parameters to improve control reliability, the method further includes: and if the operation data of the wind turbine generator is not recovered to be normal, adjusting the determined control parameters until the operation data of the wind turbine generator is recovered to be normal, and issuing the corresponding control parameters when the operation data of the wind turbine generator is recovered to be normal to the rear-end wind turbine generator so as to realize the control of the rear-end wind turbine generator.
Furthermore, in order to improve the rapidity of data transmission, control instructions and control parameters are sent to the wind turbine generator through a Powerlink optical fiber ring network.
Further, the control instructions include yaw instructions, pitch instructions, and engine torque instructions.
In order to solve the technical problem, the invention also provides a wind turbine generator coordinated control system which comprises a master station and wind turbine controllers, wherein the master station is in communication connection with each wind turbine controller;
the head station is configured to: acquiring operation data of different wind turbine generators in real time, and judging whether the operation data is abnormal or not; when the operation data of a certain wind turbine generator is abnormal, determining a corresponding control instruction according to the abnormal operation data, and sending the determined control instruction to a fan controller of the wind turbine generator;
the wind generating set controller is used for: and determining corresponding control parameters according to the received control instruction to control the wind turbine generator, and if the operation data of the wind turbine generator is recovered to be normal, issuing the determined control parameters to a fan controller of the rear-end wind turbine generator to realize the control of the rear-end wind turbine generator.
The invention has the beneficial effects that: when the operation data of a certain wind turbine generator is abnormal, the control parameters corresponding to the wind turbine generator are sent to the rear-end wind turbine generator, so that the rear-end wind turbine generator is controlled according to the received control parameters, the problem that the adjustment control speed is slow when the same fault occurs in the rear-end wind turbine generator subsequently is solved, the feedforward control of the rear-end wind turbine generator is realized, and the safety performance of the wind turbine generator in the whole plant is improved.
Further, in order to obtain accurate control parameters, the wind generating set controller is further configured to: and if the operation data of the wind turbine generator is not recovered to be normal, adjusting the determined control parameters until the operation data of the wind turbine generator is recovered to be normal, and transmitting the corresponding control parameters to the fan controller of the wind turbine generator when the operation data of the wind turbine generator is recovered to be normal.
Furthermore, in order to improve the rapidity of data transmission, the central station is in communication connection with each fan controller through a Powerlink optical fiber ring network.
Further, the control instructions include yaw instructions, pitch instructions, and engine torque instructions.
Drawings
FIG. 1 is a block diagram of a coordinated control system of a wind turbine generator according to the present invention;
FIG. 2 is a flow chart of a coordinated control method of a wind turbine generator set according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the wind turbine generator coordinated control system comprises:
the embodiment provides a wind turbine generator coordinated control system, which comprises a master station (workstation) and wind turbine controllers, wherein each wind turbine controller is used for controlling and connecting a corresponding wind turbine generator. For convenience of description, each fan controller is hereinafter referred to as a sub-station.
In order to realize the data interaction between the sub-stations and the main station and the rapidity of the data interaction, a plurality of PowerLink optical fiber ring networks are established in each wind power plant, and each PowerLink optical fiber ring network is connected with each sub-station through a PowerLink bus and is connected with the main station through a PowerLink module. Photoelectric conversion equipment is arranged between each PowerLink bus and the PowerLink optical fiber ring network, so that data in the PowerLink bus is transmitted to the PowerLink optical fiber ring network through the photoelectric conversion equipment, or the data in the PowerLink optical fiber ring network is transmitted to the PowerLink bus through the photoelectric conversion equipment. As shown in fig. 1, in the present embodiment, two PowerLink optical fiber ring networks are commonly established, where the PowerLink optical fiber ring network 1 is connected to N substations (machine CPUs) through a PowerLink bus, and the PowerLink optical fiber ring network 2 is connected to another M substations through the PowerLink bus.
It should be noted that, based on the PowerLink optical fiber ring network, the master station can acquire data of all units in the whole wind farm in time, and meanwhile, the master station can issue control commands to the units in the wind farm in real time, so that rapidity of data transmission is guaranteed. Of course, as another embodiment, the PowerLink optical fiber ring network may be replaced by another type of optical fiber ring network in the prior art under the condition that the data transmission speed and the data transmission amount are ensured to meet the requirements.
The main station comprises a data acquisition system, a fault analysis system and a coordination control and protection control system which are sequentially in communication connection, the data acquisition system collects running state data of each unit and running state data of each component of the unit through a Modbus protocol or an IEC104 protocol and sends the collected data to the fault analysis system, the fault analysis system performs fault analysis according to the received data and sends fault judgment results to the coordination control and protection control system, and the coordination control and protection control system determines corresponding control strategies according to the fault judgment results and sends control instructions corresponding to the control strategies to each substation. Wherein the data acquisition system, the fault analysis system, and the coordination control and protection control system may be implemented by one or more controllers.
Based on the wind turbine generator coordinated control system, the embodiment also provides a wind turbine generator coordinated control method, the method takes the whole wind power plant as a controlled object, when the operation data of a certain unit is abnormal, a control instruction is issued to the unit, a corresponding control parameter is determined, and the control parameter is sent to the rear-end unit to regulate and control the rear-end unit in time, so that the purpose of feedforward control on the rear-end unit is achieved, the control is advanced, the regulation speed is high, the problem of control hysteresis of the single unit is solved, the problem of unit failure caused by the same factor is effectively reduced, and the power generation capacity of the wind power plant is improved. With reference to fig. 1, a flow chart corresponding to the wind turbine generator coordination control method is shown in fig. 2, and specifically includes the following steps:
(1) the method comprises the steps of collecting operation data of different wind turbine generators in real time and judging whether the operation data are abnormal or not.
The operation data of the wind turbine generator set comprises power, a climbing rate, a generator rotating speed, a variable pitch angle, a vibration peak value, a yaw angle, torque and the like of the generator set.
(2) And when the operation data of a certain wind turbine generator is abnormal, determining a corresponding control instruction according to the abnormal operation data, and issuing the determined control instruction to the wind turbine generator.
The abnormal operation data means that the operation data exceeds the corresponding set limit value. According to the abnormal condition of the operation data of the wind turbine generator, the master station can determine the corresponding control instruction and send the determined control instruction to the fan controller corresponding to the wind turbine generator. The control instructions corresponding to the wind turbine generator set comprise instructions of yaw, pitch variation, generator torque and the like. For example, when turbulence or gust occurs, the power and the rotating speed of the wind turbine generator set change, and the master station sends a pitch or yaw instruction to adjust the power and the rotating speed of the wind turbine generator set so as to deal with the influence of the turbulence or the gust on the load of the wind turbine generator set. In addition, the control instruction issued by the central station includes part of control parameters of the wind turbine generator system, such as a power limit value, a forced start yaw deviation and other control parameters.
(3) And the wind turbine generator determines corresponding control parameters according to the received control instructions to control, and if the operation data of the wind turbine generator is recovered to be normal, the determined control parameters are issued to the rear-end wind turbine generator to realize the control of the rear-end wind turbine generator.
After the fan controller of the wind turbine with abnormal operation data receives a control instruction issued by the master station, the corresponding control parameters are determined, and the wind turbine is controlled according to the determined control parameters. And the corresponding control parameters determined by the fan controller of the wind turbine with abnormal operation data according to the control instruction comprise a minimum pitch position limit value, a pitch adjusting speed, a yaw position target value and the like. Because the specific process that the fan controller of the wind turbine generator determines the corresponding control parameter according to the control instruction belongs to the prior art, the detailed description is omitted here.
When the wind turbine with abnormal operation data is controlled by the determined control parameters, if the operation data of the wind turbine recovers to be normal, the wind turbine is used as a front-end unit, and the corresponding fan controller sends the corresponding control parameters to the main station through the PowerLink optical fiber ring network and then the main station sends the control parameters to the rear-end fan controller. And if the operation data of the wind turbine generator is not recovered to be normal, adjusting the determined control parameters until the operation data of the wind turbine generator is recovered to be normal, and sending the corresponding control parameters when the operation data of the wind turbine generator is recovered to be normal to the rear-end wind turbine generator so as to control the rear-end wind turbine generator.
Here, the front end unit and the rear end unit are not front and rear in azimuth, but are based on the direction of the incoming wind, the front end unit being located upstream in the wind direction, and the rear end unit being located downstream in the wind direction.
Taking a 2MW unit as an example, the capacity of a wind power plant is 200MW, when the turbulence intensity is larger than a set value 15, impact is brought to the load of the unit, and a vibration value (the vibration value here refers to a front-back vibration value and a left-right vibration value of the cabin measured by an acceleration sensor installed inside the cabin in real time) exceeds a limit value, so that fault shutdown is caused. When the turbulence value is larger than the set value, the fault analysis system outputs a zone bit, the coordination control and protection control system receives the zone bit, judges the number of the machine position, sends out a control instruction and sends out a pitch adjusting instruction to the rear-end machine set according to the operation result of the front-end machine set.
The pitch system may approximate the transfer function:
By adopting the wind turbine generator coordinated control method, not only can the safety of the generator be improved, but also the method can be applied to improving the generating capacity of the generator, increasing the power grid adaptability of the generator and the like.
The embodiment of the wind turbine generator coordinated control method comprises the following steps:
the present embodiment provides a wind turbine coordination control method, which has been described in detail in the foregoing wind turbine coordination control system embodiment, and is not described herein again.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope thereof, and although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present application, various changes, modifications or equivalents of the embodiments of the present application can be made, and these changes, modifications or equivalents are within the protection scope of the claims of the present invention.
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