CN105134493B - A kind of information gathering and storage method based on wind turbine control system - Google Patents
A kind of information gathering and storage method based on wind turbine control system Download PDFInfo
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- CN105134493B CN105134493B CN201510679670.5A CN201510679670A CN105134493B CN 105134493 B CN105134493 B CN 105134493B CN 201510679670 A CN201510679670 A CN 201510679670A CN 105134493 B CN105134493 B CN 105134493B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a kind of information gathering based on wind turbine control system and storage method, it is characterised in that：Obtain to communicate with programmable logic controller (PLC) and connect and gather the acquisition system of its variable data；The information gathering and storage method comprise the following steps：Step1, the scan period for defining programmable logic controller (PLC) for controlling wind power generating set and timestamp, scan period are x milliseconds；Step2, variable data information table, and each variable data sample frequency are set in acquisition system；Variable data sample frequency is N × x milliseconds, and wherein N is positive number；Step3, start acquisition system, corresponding variable data in programmable logic controller (PLC) is gathered according to above-mentioned each variable data sample frequency respectively；Step4, acquisition system store above-mentioned variable data.The variable data of more detailed control system can be obtained using the method for the present invention, help, which is realized, quick and precisely searches failure cause, significant to Wind turbines condition monitoring and fault diagnosis.
Description
Technical field
The invention belongs to the control system field of wind power generating set, and in particular to one kind is controlled based on wind power generating set
The information gathering of system and storage method.
Background technology
Wind energy is inexhaustible, one of preferable clean energy resource.Wind energy is for water shortage, short bunker and traffic
Offshore islands, Pastoral Areas, mountain area and the highlands of inconvenience, utilize wind-power electricity generation with suiting measures to local conditions, are especially suitable for.
Wind power generating set is a kind of device that can be using wind energy to generate electricity.Wind power generating set is by some groups
Into wherein control system extends through each part, and whether the quality of control system is directly connected to wind power generating set and can
Safe and reliable operation, obtain ceiling capacity, there is provided good power quality.Control system mainly includes various sensors, becomes slurry
System, programmable logic controller (PLC)（English abbreviation：PLC）, power output unit, reactive compensation unit, cutting-in control unit, peace
Full guard unit, communication interface circuit, monitoring unit, wherein programmable logic controller (PLC) be respectively with remaining list in control system
The control device for the core being electrically connected between member or component.
At present, in order to ensure the normal operation of wind power generating set, prior art passes through wind field SCADA system（It is English complete
Referred to as：Supervisory Control And Data Acquisition, Chinese are：Data acquisition and monitoring control system
System) come to wind power generating set（And its control system）Carry out data acquisition and store and be monitored, as notification number is
CN202995439U, disclosed " a kind of monitoring system for wind power plant ", the monitoring system is led to including wind, farm site
Interrogate network, wind power plant ring exchanger, wind power plant Intra-Network switch, SCADA system server；The wind, farm site communication network
Network, the wind power plant ring exchanger, the wind power plant Intra-Network switch connect with the SCADA system sequence server.
But the above-mentioned monitoring system for wind power plant has following weak point when in use：SCADA system is led to
Frequently with acquisition system standard and MODBUS communications protocol, its sample frequency is hundreds of milliseconds to several seconds of fixed frequency, and all
It is the sampling that variable data is carried out by a time scale, the feelings of transient fault and the basic no record of SCADA system easily occurs
Condition, it is unfavorable for quickly and accurately searching failure cause.
Therefore applicant considers to design a kind of information gathering and storage method based on wind turbine control system, makes it
Data sampling frequency is more flexible, can obtain the variable data of detailed and more reference value control system, help to realize
Failure cause is quick and precisely searched, improves the efficiency of the operation and maintenance of wind power generating set.
The content of the invention
For above-mentioned the deficiencies in the prior art, the technical problems to be solved by the invention are：How one kind is provided and is based on wind
The information gathering of power generator set control system and storage method, make its data sampling frequency more flexible, can obtain more
The variable data of detailed and more reference value control system, help, which is realized, quick and precisely searches failure cause, improves wind-force
The efficiency of the operation and maintenance of generating set.
In order to solve the above-mentioned technical problem, present invention employs following technical scheme：
A kind of information gathering and storage method based on wind turbine control system, obtain one kind can with it is described can
Programmed logic controller communication connects and gathers the acquisition system of its variable data；The information gathering and storage method include following
Step：
Step1, the scan period for defining programmable logic controller (PLC) for controlling wind power generating set and timestamp, institute
It is x milliseconds to state the scan period；
Step2, variable data information table, and each variable data sample frequency are set in the acquisition system；It is described
Variable data sample frequency is N × x milliseconds, and wherein N is positive number；
Step3, start the acquisition system, gathered respectively according to above-mentioned each variable data sample frequency described programmable
Corresponding variable data in logic controller；
Step4, the acquisition system store above-mentioned variable data.
Preferably, the acquisition system includes communication module, processor and memory module；
The processor is electrically connected with the communication module and memory module respectively；
The communication module is based on socket communication agreement and connected with programmable logic controller (PLC) communication.
Preferably, the communication module is connected by being communicated between interchanger and the programmable logic controller (PLC).
As an improvement, the acquisition system also includes the input module being electrically connected with respectively with the processor and display mould
Block.So, the setting of input module easily can be configured to the background program in acquisition system（Such as create different uses
The variable data information table of frequency（For being acquired storage to variable data）, the sample frequencys of different variable datas is set）.
Display module can be shown to the background program in variable data or acquisition system, maintain easily personnel on site's debugging.
As an improvement, in above-mentioned step4 steps：The memory module has buffer area and permanent storage area；To described
When variable data is stored, first variable data is stored into buffer area, and it is full to judge whether buffer area is write：If buffer area is not
Write completely, then continue to store in the buffer area；If the buffer area is write completely, the variable data in buffer area is transferred to institute
State in permanent storage area and store.
Preferably, the variable data in the programmable logic controller (PLC) passes to the controller by RPC modes.
RPC（Remote Procedure Call Protocol）--- remote procedure call protocol, it is that one kind passes through
Network asks service from remote computer program, the agreement without understanding underlying network technology.Acquisition system agreement is false
The presence of fixed some host-host protocols, such as TCP or UDP, carries information data between signal procedure.In OSI network communication models
In, acquisition system spans transport layer and application layer.Acquisition system to develop answering including network distribution type multiprogram
It is more prone to program.
Acquisition system uses Client/Server pattern.Requestor is exactly a client computer, and service providing program is just
It is a server.First, client calls process sends a recalls information for having a process parameter to service processes, then etc.
Information to be answered.In server end, process keeps sleep state untill the arrival of recalls information.When a recalls information arrives
Reach, server obtains process parameter, result of calculation, sends reply message, then waits next recalls information, finally, client
Hold calling process to receive reply message, obtain proceeding results, then call execution to continue.
After variable data in above-mentioned programmable logic controller (PLC) passes to the controller by RPC modes, it can obtain
Following technique effect：1st, interprocess communication, and fast response time are realized.2nd, can be carried out according to the different collection demand of variable
Different requests make it that variable collection is more flexible.
Compared with the existing technology compared with, information gathering of the present invention based on wind turbine control system and storage method,
With technique effect beneficial below：
Acquisition system standard and modbus-tcp communication protocols used by the SCADA system of prior art, it gathers single
The maximum variable data number of platform wind power generating set is about 1200, the fixed frequency that sample frequency is hundreds of milliseconds to several seconds
Rate, Gu Qidou are the samplings that variable data is carried out by a time scale.
The collection of the information based on control system of wind turbines of the present invention and storage method.This method is first with wind-powered electricity generation
The information content of unit control system multi-parameter, establish the collection framework and system of different time scales（By step2 come real
It is existing）；Secondly, using the communication of programmable logic controller (PLC) and acquisition system, while ensure that time synchronized, it is ensured that different
The accuracy of the communications of time scale information；Finally, using the memory module of acquisition system, when realizing Large Copacity difference
Between yardstick multi-parameter storage.On the one hand this method can consider different time scales and realize programmable logic controller (PLC) and adopt
The time synchronized of collecting system, it on the other hand can also realize the multi-parameter of different time scales（" parameter " is also " variable data "）
Large Volume Data information storage, to based on control system of wind turbines information realization Wind turbines health status it is real-time
Line monitors provides technical support with control, is had important practical significance to improve running of wind generating set reliability and safety.
Acquisition system in the present invention is programmed by using socket communication agreement, binds 3500 ports（Also can adopt
With other ports）, data exchange between programmable logic controller (PLC) and acquisition system is realized, the master control to wind power generating set
Various control information in system are acquired, and minimum sampling frequency reaches 10ms（With the scanning week of programmable logic controller (PLC)
Phase speed is consistent）, maximum, which gathers number, can reach the variable in 2500 different type different scanning cycles.The essence of gathered data
Degree is high, and data volume is big, can realize comprehensive monitoring to variable data in control system and record.It is able to record that apparatus for lower wind is sent out
The information of group of motors failure transient so that acquired information has the characteristic of many reference amounts Multiple Time Scales, be fault tracing and
Wind power generating set solid property provides effective data supporting, more reference value.
The present invention establishes or changed variable data information table by input module, and being sent to programmable logic controller (PLC) please
Ask, then variable information batch is returned to acquisition system by programmable logic controller (PLC).Acquisition system is with asynchronous multithreading
It is embodied as core, by double linked list storehouse, realizes the data acquisition and data processing in different acquisition cycle.And can be according to scanning
Cycle is scanned and variable data is sampled, and is only just acquired after variable, which changes, just to carry out, variable data is adopted
Mode set is more flexible practical.
Brief description of the drawings
Fig. 1 is the collection of the information based on control system of wind turbines of the invention and the installation of acquisition system in storage method
Structural representation in wind power generating set.
Fig. 2 is acquisition system in the collection of the information of the invention based on control system of wind turbines and storage method with that can compile
Attachment structure schematic block diagram between journey logic controller.
Fig. 3 is that the collection of the information of the invention based on control system of wind turbines and storage method carry out variable data collection
Flow chart.
Fig. 4 is that the collection of the information of the invention based on control system of wind turbines and storage method carry out variable data storage
Flow chart.
Fig. 5 is the portion returned using the collection of information of the present invention based on control system of wind turbines and storage method collection
Variation per minute data carry out Fourier transformation analysis chart.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
During specific implementation：As shown in Figure 1 to Figure 2, a kind of information gathering based on wind turbine control system and deposit
Method for storing, obtain a kind of can be communicated with the programmable logic controller (PLC) and connect and gather the acquisition system 1 of its variable data；
The information gathering and storage method comprise the following steps：
Step1, the scan period for defining programmable logic controller (PLC) for controlling wind power generating set and timestamp, institute
It is x milliseconds to state the scan period；
Define for controlling the timestamp of four variables before the programmable logic controller (PLC) of wind power generating set can be respectively：
First variable i 1 is year, the moon；
Second variable i 2 be day, when, point；
3rd variable i 3 is the second；
4th variable i 4 is millisecond；
Step2, variable data information table, and each variable data sample frequency are set in the acquisition system 1；It is described
Variable data sample frequency is N × x milliseconds, and wherein N is positive number；
Step3, start the acquisition system 1, gathered respectively according to above-mentioned each variable data sample frequency described in can compile
Corresponding variable data in journey logic controller；
Step4, the memory module of the acquisition system 1 store above-mentioned variable data.
When it is implemented, it is preferred that the sample frequency includes 10ms, 100ms, 1000ms, 10000ms, 600s.It is every kind of to adopt
Sample frequency can gather a variety of variable datas simultaneously.The time point of every sample frequency weekly, then in the use frequency of judgement setting
Whether variable data changes：If not changing, new a data is not established in variable data information table；If have
Change, then need to be recorded wherein（If change, stores new variable data value；If not changing, former collection is repeated
Variable data value）.Therefore when gathering variable data, only when variable data changes, communication transfer just is carried out to it, this
Sample can not only reduce the occupancy to bandwidth, improve the efficiency of bandwidth for transmission data；Data integrity can also be kept simultaneously（More
Beneficial to by variable data be used for search failure）While, improve the storage efficiency for variable data（Do not change in variable data
When, the former variable data value gathered is repeated, without carrying out data transmission）.
All packets contain four kinds of data types, are INT respectively, BOOL, FLOAT and REAL types（Specifically can be by defeated
Enter module to obtain in the data type of the daemon software of acquisition system 1）.
The acquisition system 1 of the programmable logic controller (PLC) variable data being used in acquisition control system, the collection
System 1 includes communication module, processor and memory module；
The processor is electrically connected with the communication module and memory module respectively；
The communication module is based on socket communication agreement and connected with programmable logic controller (PLC) communication.
Wherein, the communication module is connected by being communicated between interchanger 3 and the programmable logic controller (PLC).
Wherein, the acquisition system 1 also includes the input module and display module being electrically connected with respectively with the processor.
During implementation, preferably above-mentioned acquisition system is arranged in the switch board 2 of wind power generating set.
Wherein, in above-mentioned step4 steps：The memory module has buffer area and permanent storage area；To the variable
When data are stored, first variable data is stored into buffer area, and it is full to judge whether buffer area is write：If buffer area is not write
It is full, then continue to store in the buffer area；If the buffer area is write completely, the variable data in buffer area is transferred to described
Stored in permanent storage area.
Wherein, the variable data in the programmable logic controller (PLC) passes to the controller by RPC modes.
When it is implemented, use embedded Sqlserver2008r2 databases in acquisition system, so as to for
A large amount of different type, the storages and query function of the variable data of different sample frequencys.Query function contain by prefix lookups,
A variety of conditional combination inquiries, picture function, facilitate engineer to inquire about and analyze data.
When data storage is in above-mentioned database, the database is divided into basic database again（ibox）, and gathered data
Database (during the iboxdata_ dates).
Basic database：Storage control system relevant configuration information and variable data information table.
Acquisition database：Store the variable data collected.
The data that data memory module is stored both are from acquisition module, also as acquisition system 1, support INT,
The type of BOOL, FLOAT and REAL type four（With specific reference to being configured acquisition from the background）.
In general, identical is taken to build table mode all data in database, when including collection per a data
Between stamp, variable numbering, variable name, data type and data value.For abnormal data and other special datas, according to specific feature
Establish variable data information table.
1）For each variable data, if not changing more than predetermined time interval, it is also desirable in variable data
Stored again in information table, the specific storage cycle allows to be configured in the daemon software of acquisition system 1（According to each
Variable data is separately provided cycle starting point, and is set without unified, can so obtain the variable data of more reference value
Information）.
2）Same class data will be divided into a table（The naming rule of table is 2 day of 2 months data type+4 years of prefix
At 2, data type prefix is set in using system background software）.Every table is set as after one hour with a new table
Instead of old table is only for inquiry and dump, to ensure data-handling efficiency.
3）Because database volume is limited, once therefore data storage reach the threshold values set up, separate current database, wound
Build new acquisition database；If disk space is inadequate, earliest acquisition database data are directly deleted.
Data integrity in system environments, mainly constrained by entity integrity, referential integrity constraints and statistics about
Beam three class mode ensures.
System ensures the promptness of data by the cooperation of drainage pattern and memory module, and wherein drainage pattern ensures real
When gather, database then ensure accident before data in the part of most forward inquiry.
It can be realized using the above-mentioned information gathering based on wind turbine control system and storage method：Become in storage
Measure in data procedures, variable data is divided into by different important levels according to the sample frequency of variable data, got over using frequency
It hurry up, importance is higher.So i.e. can be using limited memory space come the higher variable data of sufficient keeping records importance.
So as to improve the utilization ratio of memory module, and effectively save memory space.
It can be realized using the above-mentioned information gathering based on wind turbine control system and storage method method：Through adopting
Relevant variable data value does not change after the time point of sample frequency, and still it is preserved, and this makes it possible to ensure data
Completeness and trackability.
The contrast table of the SCADA system of acquisition system and prior art in the present invention of table 1
| The SCADA systems of prior art | Acquisition system in the present invention | |
| Monitoring Scope | It is the data monitoring of whole wind field | The variable of single wind turbine control system is entered Row record |
| Sampling Frequency | SCADA system sampling frequencies are hundreds of milliseconds to several The fixed frequency of second | Minimum sampling frequency is 10ms, is that air-blower control may be programmed The execution cycle of logic controller |
| Variable Number | Gather the variable data of single wind generator group Number about 1200 | Variable data maximum can be 2500 or so |
| Sampling Example 1 | The sample frequency of temperature is 500ms | The sample frequency of temperature parameter is 1s |
| Sampling Example 2 | The sample frequency of line voltage is 500ms（With temperature The sample frequency of parameter is identical） | The sample frequency of line voltage is 10ms |
As seen from the above table：Collection of the SCADA systems of prior art for variable data is mainly used in Wind turbines
It is controlled, its time scale gathered is all consistent, it is impossible to applied in Wind turbines status monitoring.Moreover, existing skill
Art mostly stresses Temperature Quantity for the method or system of status monitoring, is long time scale（Also all it is a time scale
's）.Technical scheme is creative to be proposed to adopt according to the communication of different time scales for torque, electric current and temperature etc.
Collection and storage are significant to Wind turbines condition monitoring and fault diagnosis.
Embodiment 1：
After the above-mentioned information gathering based on wind turbine control system and storage method.For example, work as master control system
System quotes generator speed hypervelocity failure, then shows that generator speed is all normal by the SCADA data gathered, but send out
Motor speed hypervelocity failure is quoted to come always, at this moment carries out data acquisition by the method for the present invention, i.e., can be to the change of collection
Amount data are inquired about, and find that the exact time of saltus step, and the concrete numerical value beyond normal value occur for rotating speed.Thus can
Enough last confirmation problems are that speed probe reading value mistake occurs, and this makes it possible to quickly check and find that failure is due to turn
Cable between speed and programmable logic controller (PLC), which loosens, to be caused.It can be seen that it can be significantly improved pair after method using the present invention
The diagnosis capability of wind power generating set failure, and rapidly failure is confirmed and positioned.
Embodiment 2：
As shown in figure 5, wind power generating set needs to carry out driving-chain vibration Frequency Analysis early stage.Using the method for the present invention
Afterwards, we can use 10ms sample frequency, therefore can obtain and be not easy distortion, high-precision sampled data, this makes it possible to
Obtain the more accurately and reliably analysis result of driving-chain vibration frequency.
It the above is only the preferred embodiment of the present invention, need to point out it is not depart from this skill for those skilled in the art
On the premise of art scheme, several modifications and improvements can also be made, the technical scheme of above-mentioned modification and improvement equally should be considered as
Enter this application claims scope.
Claims (5)
1. a kind of information gathering and storage method based on wind turbine control system, it is characterised in that：Obtain a kind of energy
Programmable logic controller (PLC) communication that is enough and being used to control wind power generating set connects and gathers the acquisition system of its variable data；
The information gathering and storage method comprise the following steps：
Step1, the scan period for defining programmable logic controller (PLC) for controlling wind power generating set and timestamp, it is described to sweep
It is x milliseconds to retouch the cycle；
Step2, variable data information table, and each variable data sample frequency are set in the acquisition system；The variable
Data sampling frequency is N × x milliseconds, and wherein N is positive number；
Step3, start the acquisition system, the FPGA is gathered according to above-mentioned each variable data sample frequency respectively
Corresponding variable data in controller；Every kind of sample frequency can gather a variety of variable datas simultaneously, every sample frequency weekly
Time point, then judge whether the use frequency internal variable data of setting change：If not changing, former collection is repeated
Variable data value, and new a data is not established in variable data information table；If changing, new variable data is stored
It is worth and is recorded；
Step4, the acquisition system store above-mentioned variable data；
The acquisition system includes communication module, processor and memory module；
The processor is electrically connected with the communication module and memory module respectively；
The communication module is based on socket communication agreement and connected with programmable logic controller (PLC) communication.
2. information gathering and storage method according to claim 1 based on wind turbine control system, its feature
It is：The communication module is connected by being communicated between interchanger and the programmable logic controller (PLC).
3. information gathering and storage method according to claim 1 based on wind turbine control system, its feature
It is：The acquisition system also includes the input module and display module being electrically connected with respectively with the processor.
4. information gathering and storage method according to claim 1 based on wind turbine control system, its feature
It is：In above-mentioned step4 steps：The memory module has buffer area and permanent storage area；The variable data is carried out
During storage, first variable data is stored into buffer area, and it is full to judge whether buffer area is write：If buffer area is not write completely, continue
Stored in the buffer area；If the buffer area is write completely, the variable data in buffer area is transferred to the fixed storage
Stored in area.
5. information gathering and storage according to any one of claim 1 to 4 based on wind turbine control system
Method, it is characterised in that：Variable data in the programmable logic controller (PLC) is transmitted by remote procedure call protocol mode
To the programmable logic controller (PLC).
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| CN105443323A (en) * | 2015-12-16 | 2016-03-30 | 北京金风科创风电设备有限公司 | data acquisition method, device and system for wind generating set |
| CN106438221B (en) * | 2016-12-27 | 2019-06-07 | 北京金风科创风电设备有限公司 | Signal acquisition device of wind generating set and control method thereof |
| CN108052633B (en) * | 2017-12-20 | 2020-04-17 | 重庆科凯前卫风电设备有限责任公司 | Wind power plant fault data acquisition system and method based on SCADA system |
| CN113027678B (en) * | 2019-12-25 | 2022-07-12 | 北京金风科创风电设备有限公司 | Wind driven generator group data acquisition system, method and device |
| CN111080981B (en) * | 2019-12-30 | 2021-10-22 | 安徽容知日新科技股份有限公司 | Alarm method and alarm system of equipment and computing equipment |
| CN113944601A (en) * | 2021-10-15 | 2022-01-18 | 上海大学 | Method for real-time acquisition, transmission and processing of high-frequency mass data of fan |
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| DK2599995T3 (en) * | 2011-11-30 | 2016-02-08 | Siemens Ag | Wind turbine control system |
| CN202995439U (en) * | 2012-12-27 | 2013-06-12 | 北京万源工业有限公司 | Monitoring system for wind power generation field |
| CN104182551A (en) * | 2013-05-20 | 2014-12-03 | 华南理工大学 | Multi-sampling rate multi-channel synchronous data acquisition system and acquisition method |
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