CN105134493A - Information acquisition and storage method based on wind generator set control system - Google Patents
Information acquisition and storage method based on wind generator set control system Download PDFInfo
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- CN105134493A CN105134493A CN201510679670.5A CN201510679670A CN105134493A CN 105134493 A CN105134493 A CN 105134493A CN 201510679670 A CN201510679670 A CN 201510679670A CN 105134493 A CN105134493 A CN 105134493A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses an information acquisition and storage method based on a wind generator set control system, which is characterized by acquiring an acquisition system which can be connected with a programmable logic controller in a communication mode and used for acquiring variable data. The information acquisition and storage method comprises the following steps: 1. defining scanning period and a time stamp of the programmable logic controller for controlling the wind generator set, wherein the scanning period is x milliseconds; 2. setting a variable data information table and variable data sampling frequency in the acquisition system, wherein the variable data sampling frequency is N*x milliseconds, and N is a positive number; 3. starting the acquisition system, and respectively acquiring the corresponding variable data in the programmable logic controller according to the variable data sampling frequency; and 4. storing the variable data by the acquisition system. The method can be used for acquiring more detailed variable data of the control system and helping with quickly and accurately detecting the fault cause, and thus, has important meanings for wind generator set state monitoring and fault diagnosis.
Description
Technical field
The invention belongs to the control system field of wind power generating set, be specifically related to a kind of information gathering based on wind turbine control system and storage means.
Background technique
Wind energy is inexhaustible, one of desirable clean energy resource.Wind energy, for lack of water, short bunker and ungetable offshore islands, Pastoral Areas, mountain area and plateau section, utilizes wind-power electricity generation with suiting measures to local conditions, very applicable.
Wind power generating set is a kind of device that can utilize wind energy to generate electricity.Wind power generating set is made up of multiple part, and wherein control system extends through each part, and the quality of control system be directly connected to wind power generating set whether can safe and reliable operation, obtain ceiling capacity, good power quality be provided.Control system mainly comprises various sensor, becomes slurry system, programmable logic controller (PLC) (English abbreviation: PLC), power stage unit, reactive compensation unit, cutting-in control unit, security protection unit, communication interface circuit, monitoring unit, and wherein programmable logic controller (PLC) is the control means of the core be electrically connected between remaining element or components and parts respectively and in control system.
At present, in order to ensure the normal operation of wind power generating set, by wind field SCADA system, (English full name is prior art: SupervisoryControlAndDataAcquisition, Chinese is: data capture and supervisor control) data capture and storage are carried out to wind power generating set (and control system) and monitors, if notification number is CN202995439U, disclosed " a kind of supervisory system for wind power plant ", this supervisory system comprises wind energy turbine set communication network on-the-spot, wind energy turbine set ring exchanger, wind energy turbine set Intra-Network switch, SCADA system server, described wind energy turbine set communication network on-the-spot, described wind energy turbine set ring exchanger, described wind energy turbine set Intra-Network switch are connected with described SCADA system sequence server.
But the above-mentioned supervisory system for wind power plant has following deficiency in use: SCADA system adopts acquisition system standard and MODBUS communications protocol usually, its sample frequency is the fixed frequency of hundreds of millisecond to several seconds, and be all the sampling being carried out variable data by a time scale, easily there is transient fault and SCADA system non-registered situation at all, be unfavorable for looking up the fault reason quickly and accurately.
Therefore claimant considers a kind of information gathering based on wind turbine control system of design and storage means, make its data sampling frequency more flexible, can obtain detailed and have more the variable data of the control system of reference value, help realizes quick and precisely looking up the fault reason, improves the efficiency of the operation and maintenance of wind power generating set.
The acquisition system standard that the SCADA system of prior art adopts and modbus-tcp communication protocol, its maximum variable data number gathering single wind generator group is about 1200, sample frequency is the fixed frequency of hundreds of millisecond to several seconds, and Gu Qidou is the sampling being carried out variable data by a time scale.
The collection of the information based on control system of wind turbines of the present invention and storage means.First the method utilizes the quantity of information of control system of wind turbines multi-parameter, establishes collection framework and the system (being realized by step2) of Different time scales; Secondly, utilize communicating of programmable logic controller (PLC) and acquisition system, while ensure that time synchronization, ensure that the accuracy of the communications of Different time scales information; Finally, utilize the memory module of acquisition system, achieve the storage of the multi-parameter of Large Copacity Different time scales.The method can be considered Different time scales on the one hand and realize the time synchronization of programmable logic controller (PLC) and acquisition system, the storage of the Large Volume Data information of the multi-parameter (" parameter " is also " variable data ") of Different time scales can also be realized on the other hand, technical support is provided, for improving running of wind generating set reliability and safety has important practical significance to based on the real time on-line monitoring of control system of wind turbines information realization Wind turbines health status and control.
Acquisition system in the present invention is programmed by using socket communication agreement, bind 3500 ports (also can adopt other port), realize exchanges data between programmable logic controller (PLC) and acquisition system, various control informations in the master control system of wind power generating set are gathered, it is consistent with the acanning cycle speed of programmable logic controller (PLC) that minimum sampling frequency reaches 10ms(), maximum collection number can reach the variable in 2500 dissimilar different scanning cycles.The precision of image data is high, and data volume is large, can achieve the comprehensive supervision to variable data in control system and record.The information of wind power generating set failure transient can be recorded, make obtained information have the characteristic of many reference amounts Multiple Time Scales, for fault tracing and wind power generating set solid property provide effective data supporting, have more reference value.
The present invention sets up or revises variable data information table by load module, sends request to programmable logic controller (PLC), and then variable information batch is returned to acquisition system by programmable logic controller (PLC).Acquisition system is embodied as core with asynchronous multithreading, by double linked list storehouse, achieves data capture and the data processing in different acquisition cycle.And can carry out scanning and sampling to variable data according to the acanning cycle, only have and just gather after variable change is just carried out, variable data acquisition mode is more flexible practical.
Summary of the invention
For above-mentioned the deficiencies in the prior art, technical problem to be solved by this invention is: how to provide a kind of information gathering based on wind turbine control system and storage means, make its data sampling frequency more flexible, can obtain more detailed and have more the variable data of the control system of reference value, help realizes quick and precisely looking up the fault reason, improves the efficiency of the operation and maintenance of wind power generating set.
In order to solve the problems of the technologies described above, present invention employs following technological scheme:
Based on information gathering and the storage means of wind turbine control system, obtain and a kind ofly can be connected with described programmable logic controller (PLC) communication and gather the acquisition system of its variable data; This information gathering and storage means comprise the following steps:
Step1, the acanning cycle defining the programmable logic controller (PLC) for controlling wind power generating set and time stamp, the described acanning cycle is x millisecond;
Step2, variable data information table is set in described acquisition system, and each variable data sample frequency; Described variable data sample frequency is N × x millisecond, and wherein N is positive number;
Step3, start described acquisition system, gather corresponding variable data in described programmable logic controller (PLC) respectively according to above-mentioned each variable data sample frequency;
Step4, described acquisition system store above-mentioned variable data.
As preferably, described acquisition system comprises communication module, processor and memory module;
Described processor is electrically connected with described communication module and memory module respectively;
Described communication module is connected with described programmable logic controller (PLC) communication based on socket communication agreement.
As preferably, described communication module is connected by communication between switchboard with described programmable logic controller (PLC).
As improvement, described acquisition system also comprises the load module and display modular that are electrically connected with described processor respectively.Like this, the setting of load module can be arranged (as created the variable data information table (storing for carrying out collection to variable data) of different employing frequency, arranging the sample frequency of different variable data) the background program in acquisition system easily.Namely display modular can show the background program in variable data or acquisition system, maintains easily personnel on site's debugging.
As improvement, in above-mentioned step4 step: described memory module has buffer area and permanent storage area; When described variable data is stored, first variable data is stored in buffer area, and judges whether buffer area is write full: if buffer area is not write full, then continue to store in described buffer area; If described buffer area is write full, then the variable data in buffer area is transferred in described permanent storage area and stores.
As preferably, the variable data in described programmable logic controller (PLC) passes to described controller by RPC mode.
RPC(RemoteProcedureCallProtocol)---remote procedure call protocol, it be a kind of by network from request service remote computer program, and do not need the agreement understanding underlying network technology.Acquisition system agreement supposes the existence of some host-host protocol, as TCP or UDP, is carry information data between signal procedure.In OSI network communication models, acquisition system spans transport layer and application layer.Acquisition system makes kit includes network distributed multi-program be more prone in interior application program.
Acquisition system adopts Client/Server pattern.Requestor is exactly a client computer, and service providing program is exactly a server.First, client calls process sends one has the recalls information of process parameter to service processes, then wait acknowledge information.At server end, process keeps sleep state until the arrival of recalls information.When a recalls information arrives, server obtains process parameter, result of calculation, sends reply message, then waits for next recalls information, and finally, client call process receives reply message, obtains proceeding results, then calls execution and proceed.
After variable data in above-mentioned programmable logic controller (PLC) passes to described controller by RPC mode, desirable following technique effect: 1, achieve interprocess communication, and fast response time.2, the collection demand different according to variable can carry out different requests and make variable collection more flexible.
Compared with the existing technology comparatively, the present invention is based on information gathering and the storage means of wind turbine control system, there is following useful technique effect:
Accompanying drawing explanation
Fig. 1 is the structural representation be arranged in wind power generating set of acquisition system in the collection of the information that the present invention is based on control system of wind turbines and storage means.
Fig. 2 is the linkage structure schematic block diagram in the collection of the information that the present invention is based on control system of wind turbines and storage means between acquisition system and programmable logic controller (PLC).
Fig. 3 is the flow chart that the collection of the information that the present invention is based on control system of wind turbines and storage means carry out variable data collection.
Fig. 4 is the flow chart that the collection of the information that the present invention is based on control system of wind turbines and storage means carry out variable data storage.
Fig. 5 utilizes to the present invention is based on the Partial Variable data that the collection of the information of control system of wind turbines and storage means collection return and carry out Fourier transformation analysis chart.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
During concrete enforcement: as shown in Figure 1 to Figure 2, a kind of information gathering based on wind turbine control system and storage means, obtain and a kind ofly can be connected with described programmable logic controller (PLC) communication and gather the acquisition system 1 of its variable data; This information gathering and storage means comprise the following steps:
Step1, the acanning cycle defining the programmable logic controller (PLC) for controlling wind power generating set and time stamp, the described acanning cycle is x millisecond;
The time stamp defined for front four variablees of programmable logic controller (PLC) that control wind power generating set can respectively:
First variable i 1 is year, the moon;
Second variable i 2 be day, time, point;
3rd variable i 3 is second;
4th variable i 4 is millisecond;
Step2, variable data information table is set in described acquisition system 1, and each variable data sample frequency; Described variable data sample frequency is N × x millisecond, and wherein N is positive number;
Step3, start described acquisition system 1, gather corresponding variable data in described programmable logic controller (PLC) respectively according to above-mentioned each variable data sample frequency;
The memory module of step4, described acquisition system 1 stores above-mentioned variable data.
During concrete enforcement, preferred described sample frequency comprises 10ms, 100ms, 1000ms, 10000ms, 600s.Often kind of sample frequency can gather multiple variable data simultaneously.The time point of every sample frequency weekly, then judge whether the employing frequency internal variable data set change: if do not change, then in variable data information table, do not set up new data; If change, then need to be recorded wherein and (if changed, then store new variable data value; If do not change, then repeat the variable data value of former collection).Therefore when gathering variable data, only have when variable data changes, just communication transfer is carried out to it, can not only taking bandwidth be reduced like this, improve the efficiency of bandwidth for transmission data; While can also keeping data integrity (being more conducive to variable data to be used for looking up the fault), improve the storage efficiency (when variable data does not change, repeat the variable data value of former collection, and do not need to carry out data transmission) for variable data simultaneously.
All packets, containing four kinds of data types, are INT, BOOL, FLOAT and REAL type (specifically obtaining in the data type of the daemon software of acquisition system 1 by load module) respectively.
The described acquisition system 1 for the programmable logic controller (PLC) variable data in acquisition control system, described acquisition system 1 comprises communication module, processor and memory module;
Described processor is electrically connected with described communication module and memory module respectively;
Described communication module is connected with described programmable logic controller (PLC) communication based on socket communication agreement.
Wherein, described communication module is connected by communication between switchboard 3 with described programmable logic controller (PLC).
Wherein, described acquisition system 1 also comprises the load module and display modular that are electrically connected with described processor respectively.
During enforcement, preferably above-mentioned acquisition system is arranged in the control cabinet 2 of wind power generating set.
Wherein, in above-mentioned step4 step: described memory module has buffer area and permanent storage area; When described variable data is stored, first variable data is stored in buffer area, and judges whether buffer area is write full: if buffer area is not write full, then continue to store in described buffer area; If described buffer area is write full, then the variable data in buffer area is transferred in described permanent storage area and stores.
Wherein, the variable data in described programmable logic controller (PLC) passes to described controller by RPC mode.
During concrete enforcement, in acquisition system, adopt embedded Sqlserver2008r2 database, thus the warehouse-in that can have for the variable data of dissimilar, different sample frequency in a large number and query function.Query function contains by prefix lookups, the inquiry of multiple conditional combination, picture function, facilitates engineer to carry out inquiry and analysis to data.
When data are stored in above-mentioned database, this database is divided into again basic database (ibox), and image data database when date (iboxdata_).
Basic database: storage control system relevant configuration information and variable data information table.
Acquisition database: the variable data that storage of collected arrives.
The data that data memory module stores, all from acquisition module, also as acquisition system 1, support INT, BOOL, FLOAT and REAL type Four types (specifically carrying out arranging acquisition according to backstage).
In general, take identical to build table mode to all data in database, each data comprises acquisition time stamp, variable numbering, variable name, data type and data value.For abnormal data and other special datas, set up variable data information table according to concrete feature.
1) for each variable data, if do not change exceeding predetermined time interval, also need to store again in variable data information table, the concrete memory cycle allows to carry out arranging (arranging cycle starting point separately according to each variable data in the daemon software of acquisition system 1, and do not carry out unifying to arrange, the variable data information having more reference value can be obtained like this).
2) same class data will be divided into a table (when the naming rule of table is 2 day of 2 months+4 years of data type prefix 2, data type prefix is arranged in employing system background software).Often open table to be set as newly showing to replace with one after one hour, old table only supplies inquiry and dump, to ensure data-handling efficiency.
3) because database volume is limited, therefore once data storage reaches the threshold values set up, be separated current database, create new acquisition database; If disk space is inadequate, then directly delete image data database data the earliest.
Data integrity, in systematic environment, ensures mainly through entity integrity constraint, referential integrity constraints and statistical restraint three class mode.
System ensures the promptness of data by the cooperation of drainage pattern and memory module, and wherein drainage pattern ensures Real-time Collection, database then ensure accident before data in the part of the most forward inquiry.
The above-mentioned information gathering based on wind turbine control system and storage means is adopted to realize: in storage of variables data procedures, variable data is divided into different important level by the sample frequency according to variable data, adopt frequency faster, significance is higher.Limited storage space can be utilized like this to carry out the higher variable data of sufficient keeping records significance.Thus improve the utilization ratio of memory module, and effectively save storage space.
The above-mentioned information gathering based on wind turbine control system and storage means method is adopted to realize: relevant variable data value does not change after the time point of sample frequency, still it is preserved, this makes it possible to the completeness and the trackability that ensure data.
The contrast table of the acquisition system in table 1 the present invention and the SCADA system of prior art
| The SCADA system of prior art | Acquisition system in the present invention | |
| Monitoring range | It is the data monitoring of whole wind field | Record is carried out to the variable of single wind turbine control system |
| Sample frequency | SCADA system sampling frequency is the fixed frequency of hundreds of millisecond to several seconds | Minimum sampling frequency is 10ms, is the execution cycle of air-blower control programmable logic controller (PLC) |
| Variable number | The variable data number gathering single wind generator group is about 1200 | Variable data is maximum can be about 2500 |
| Sampling instances 1 | The sample frequency of temperature is 500ms | The sample frequency of temperature parameter is 1s |
| Sampling instances 2 | The sample frequency of line voltage is that 500ms(is identical with the sample frequency of temperature parameter) | The sample frequency of line voltage is 10ms |
As seen from the above table: the SCADA system of prior art is mainly used in controlling Wind turbines for the collection of variable data, its time scale gathered is all consistent, can not be applied in Wind turbines status monitoring.And prior art mostly stresses Temperature Quantity for the method for status monitoring or system, is long time scale (being also all a time scale).Technological scheme of the present invention creativeness proposes for torque, electric current and temperature etc. according to the communication collection of Different time scales with store significant to Wind turbines condition monitoring and fault diagnosis.
Embodiment 1:
After adopting the above-mentioned information gathering based on wind turbine control system and storage means.Such as, when master control system quotes generator speed hypervelocity fault, it is all normal that the data gathered by SCADA then show generator speed, but generator speed hypervelocity fault is quoted always, at this moment data capture is carried out by method of the present invention, namely can the variable data gathered be inquired about, and find the exact time of rotating speed generation saltus step, and exceed the concrete numerical value of normal value.This makes it possible to finally confirm that problem is that mistake appears in speed probe read value, this makes it possible to check fast and find that fault causes because the cable between rotating speed and programmable logic controller (PLC) loosens.Visible, the diagnosis capability to wind power generating set fault can be significantly improved after adopting method of the present invention, and rapidly fault confirmed and locate.
Embodiment 2:
As shown in Figure 5, wind power generating set needs to carry out Transmitted chains vibration Frequency Analysis early stage.After adopting method of the present invention, we can adopt the sample frequency of 10ms, therefore can obtain and be not easy distortion, high-precision sampled data, this makes it possible to obtain the analysis result of Transmitted chains vibration frequency more accurately and reliably.
Below be only the preferred embodiment of the present invention; need point out be; for those skilled in the art under the prerequisite not departing from the technical program, can also make some distortion and improvement, the technological scheme of above-mentioned distortion and improvement should be considered as falling into the scope that this application claims protection equally.
Claims (6)
1. based on information gathering and the storage means of wind turbine control system, it is characterized in that: obtain and a kind ofly can be connected with described programmable logic controller (PLC) communication and gather the acquisition system of its variable data; This information gathering and storage means comprise the following steps:
Step1, the acanning cycle defining the programmable logic controller (PLC) for controlling wind power generating set and time stamp, the described acanning cycle is x millisecond;
Step2, variable data information table is set in described acquisition system, and each variable data sample frequency; Described variable data sample frequency is N × x millisecond, and wherein N is positive number;
Step3, start described acquisition system, gather corresponding variable data in described programmable logic controller (PLC) respectively according to above-mentioned each variable data sample frequency;
Step4, described acquisition system store above-mentioned variable data.
2. the information gathering based on wind turbine control system according to claim 1 and storage means, is characterized in that: described acquisition system comprises communication module, processor and memory module;
Described processor is electrically connected with described communication module and memory module respectively;
Described communication module is connected with described programmable logic controller (PLC) communication based on socket communication agreement.
3. the information gathering based on wind turbine control system according to claim 2 and storage means, is characterized in that: described communication module is connected by communication between switchboard with described programmable logic controller (PLC).
4. the information gathering based on wind turbine control system according to claim 2 and storage means, is characterized in that: described acquisition system also comprises the load module and display modular that are electrically connected with described processor respectively.
5. the information gathering based on wind turbine control system according to claim 1 and storage means, is characterized in that: in above-mentioned step4 step: described memory module has buffer area and permanent storage area; When described variable data is stored, first variable data is stored in buffer area, and judges whether buffer area is write full: if buffer area is not write full, then continue to store in described buffer area; If described buffer area is write full, then the variable data in buffer area is transferred in described permanent storage area and stores.
6. the information gathering based on wind turbine control system according to any one of claim 2 to 4 and storage means, is characterized in that: the variable data in described programmable logic controller (PLC) passes to described controller by RPC mode.
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Cited By (6)
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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 |
| CN106438221A (en) * | 2016-12-27 | 2017-02-22 | 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 |
| CN108052633A (en) * | 2017-12-20 | 2018-05-18 | 重庆科凯前卫风电设备有限责任公司 | Wind power plant failure data acquisition system and acquisition method based on SCADA system |
| CN111080981A (en) * | 2019-12-30 | 2020-04-28 | 安徽容知日新科技股份有限公司 | Alarm method and alarm system of equipment and computing equipment |
| CN113027678A (en) * | 2019-12-25 | 2021-06-25 | 北京金风科创风电设备有限公司 | Wind driven generator group data acquisition system, method and device |
| 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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| 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 |
| CN106438221A (en) * | 2016-12-27 | 2017-02-22 | 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 |
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| CN108052633A (en) * | 2017-12-20 | 2018-05-18 | 重庆科凯前卫风电设备有限责任公司 | Wind power plant failure data acquisition system and acquisition method based on SCADA system |
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| CN113027678A (en) * | 2019-12-25 | 2021-06-25 | 北京金风科创风电设备有限公司 | Wind driven generator group data acquisition system, method and device |
| 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 |
| CN111080981A (en) * | 2019-12-30 | 2020-04-28 | 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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