CN110995774A - Universal SCADA system for wind power plant - Google Patents
Universal SCADA system for wind power plant Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 claims description 13
- 230000004888 barrier function Effects 0.000 claims description 12
- 238000013144 data compression Methods 0.000 claims description 8
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- 230000005540 biological transmission Effects 0.000 claims description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
- H04L67/025—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP] for remote control or remote monitoring of applications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
- H04L67/5651—Reducing the amount or size of exchanged application data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
- H04L67/5682—Policies or rules for updating, deleting or replacing the stored data
Abstract
The system comprises a display layer, a service layer, a data layer, a basic security layer and a data communication layer, wherein the data communication layer comprises a real-time communication library and a file downloading library, the real-time communication library is a class library used for carrying out real-time communication with different types of fans, and the file downloading library is a tool class library for downloading log logs of the different types of fans; and the data communication layer is used for selecting a protocol corresponding to the fan from the real-time communication library or the file downloading library according to a request sent from the data layer so as to realize real-time communication or file downloading. The system solves the technical problems of difficult operation, more equipment, small data processing amount and the like in the prior art.
Description
Technical Field
The invention relates to the technical field of wind power, in particular to a universal SCADA system for a wind power plant.
Background
With the increasing of the loading amount of the wind power plant, when the wind power plants of different manufacturers are installed in the wind power plant, a plurality of different monitoring systems must be installed on site, and because the design manufacturers of the monitoring systems are different, the functions, interfaces, data, operations and the like of each set of monitoring system are not uniform, so that the accuracy of some functions or statistical data is inconsistent, and hardware resources are wasted. For example, when the average wind speed and the power generation amount of a whole unit need to be inquired, each set of monitoring system needs to be operated to obtain data of the corresponding unit and then summarized and sorted, and the efficiency in production is low.
At present, many companies monitor each device by using a centralized control center, however, the centralized control center needs to install a plurality of communication management machines to realize data communication, needs a data forwarding server to realize data forwarding, has relatively small read data volume, and generally uses real-time data during filing. Therefore, the communication cost of the centralized control center in the prior art is high, the data volume capable of being processed is small, and the archived data are not suitable for monitoring the wind power plant.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a universal SCADA system which is suitable for wind power plants consisting of various fans.
According to one aspect of the invention, the system comprises a display layer, a service layer, a data layer, a basic protection layer and a data communication layer, wherein the uppermost layer is the display layer, the middle layer is the service layer and the data layer, the lowermost layer is the basic protection layer and the data communication layer, the display layer at the uppermost layer is responsible for displaying effects, the middle layer is responsible for business logic processing and data processing, and the lowermost layer is responsible for physical connection and communication; the wind farm comprises different types of fans; the data layer is used for receiving a request forwarded by the service layer and submitted by a user through the display layer, analyzing whether online data or historical data is acquired according to the request, and acquiring the online data or the historical data through the data communication layer if the online data is directly acquired from the data layer; the data communication layer comprises a real-time communication library and a file downloading library, wherein the real-time communication library is a class library used for carrying out real-time communication with different types of fans, and the file downloading library is a tool class library for downloading log logs of the different types of fans; and the data communication layer is used for selecting a protocol corresponding to the fan from the real-time communication library or the file downloading library according to a request sent from the data layer so as to realize real-time communication or file downloading.
According to one aspect of the invention, the real-time communication library and the file downloading library realize data transmission with the fan and the data layer through a basic security barrier layer; the data communication layer executes different service logic codes to perform data interaction with the fan according to the received different request parameters, obtains a result after interaction, returns the result to the data layer, and returns the result to the display layer after the data layer performs data screening and mapping on the data.
According to one aspect of the invention, the wind turbine includes a wind turbine identifier that includes information indicative of real-time communication protocols and file download protocols supported by the wind turbine.
According to one aspect of the invention, the request is a monitoring request for one or more fans, and the request includes fan information and required data.
According to one aspect of the invention, the data layer is used for analyzing the request, when the request is to acquire real-time data of the fan or download a related file, the fan and a corresponding identifier are acquired from fan information of the request, the identifier is analyzed, a corresponding real-time communication protocol or a file download protocol is selected according to the identifier, and the data communication layer is communicated with the corresponding fan through the corresponding protocol to realize real-time communication with the fan or file download.
According to one aspect of the invention, the data communication layer further comprises a configuration file for recording the fan and a real-time communication protocol and a file download protocol corresponding to the fan, wherein the configuration file can be accessed and modified by a user; and when the data communication layer can not realize communication with the fan through the fan identification, reading the configuration file to communicate with the fan.
According to one aspect of the invention, the real-time communication protocol and the download file protocol of the fan identifier both include information on whether to read the configuration file, when the information indicates that the configuration file is read, the data communication layer reads the configuration file to communicate with the fan, otherwise, the data communication layer does not read the configuration file.
According to one aspect of the invention, the real-time communication protocol information of the fan identification comprises information indicating a real-time communication protocol, a data type, a function code, a start address, a length and whether to read a configuration file; the file downloading protocol of the fan identifier comprises information indicating whether to read the local configuration file, indicating a downloading mode of the file downloading protocol, indicating whether to verify downloading, the number of downloaded files, whether to store the downloaded files in the disk and whether to read the configuration file.
According to one aspect of the invention, the data layer is used for compressing and archiving historical data, and the compression is carried out by a moving average method; when the request received by the data layer is to acquire historical data, firstly, the compressed data is inquired, if the data is not compressed, the daily filing data is inquired, and the daily filing data is subjected to data compression by adopting a moving average method.
According to one aspect of the invention, the compression comprises active compression and passive compression, wherein the active compression is to compress data at a predetermined time, and the passive compression is triggered according to the physical storage capacity to delete past archived data.
According to one aspect of the invention, the active compression includes daily compression, monthly compression and annual compression, wherein daily compression is the compression of data on the day at predetermined times of the day; the month compression is to compress all day compression data of the current month at a predetermined time of each month; year compression is the compression of data at predetermined times of the year for all months of the year.
According to one aspect of the invention, the passive compression is that when the database capacity reaches a predetermined percentage of the hard disk capacity, the oldest compressed archived data is exported as a text file, and the database capacity occupied by the exported data is emptied.
The invention uses a set of universal SCADA system which can be compatible with wind turbine generators of different manufacturers, realizes direct acquisition and control of data of the generators, realizes a centralized central monitoring system of the wind power plant, can solve the problems of non-uniformity of field data, functions, reports and the like, difficult use and operation and complexity, and also solves the problems that the prior art adopts more communication equipment, has small supported data amount and is not suitable for the data of the wind turbine generators in a filing mode.
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FIG. 1 shows an architectural schematic of a wind farm generic SCADA system according to an embodiment of the invention;
FIG. 2 illustrates a data interaction process according to the SCADA system shown in FIG. 1.
Detailed Description
Referring first to fig. 1, a schematic diagram of an architecture of a wind farm generic SCADA system (a Supervisory Control And Data Acquisition system, that is, a Data Acquisition And monitoring Control system) according to an embodiment of the present invention is shown. As shown in FIG. 1, the generic SCADA system comprises five layers: the display system comprises a display layer, a service layer, a data layer, a basic security barrier layer and a data communication layer, wherein the uppermost layer is the display layer, the middle layer is the service layer and the data layer, and the lowermost layer is the basic security barrier layer and the data communication layer. The uppermost layer is responsible for displaying effects, the middle layer is responsible for a business logic processing layer and a data processing layer, and the lowermost layer is responsible for a physical connection and communication layer.
The uppermost layer, namely the fifth display layer, is a display function layer, belongs to a view layer, and is mainly used for deploying and displaying the effect of the monitoring system.
The middle layer comprises a service layer and a data layer, wherein the service layer is mainly responsible for monitoring the service logic of the system. The data layer is mainly responsible for the storage mode and the data archiving method of the operation data.
The lowest layer comprises a basic security barrier layer and a data communication layer, wherein the basic security barrier layer is a hardware support of the monitoring system and describes a hardware interface and a principle of communication. The data communication layer is mainly responsible for data acquisition, transmission interfaces and the like.
As shown in fig. 2, the presentation layer may adjust the interface and the service logic definition according to the user requirement, and may call the service layer interface to obtain the required data according to the requirement, the service layer may send the requirement to the data layer again after receiving the presentation layer request, the data layer may analyze according to the request, whether to call the data communication layer interface again, if the received request is to obtain "online data", the data communication layer interface may be called again to obtain the data, if the received request is to obtain "historical data", the request may not be sent to the data communication layer, the data may be automatically obtained from the layer, and then the data result is returned.
In order to monitor various fans of the wind power plant, a data communication layer of the SCADA system shown in fig. 1 includes a real-time communication library and a file download library.
The real-time communication library is a class library used for carrying out real-time communication with different types of units, and comprises various industrial communication protocols, such as: the file downloading library is a tool class library for downloading log logs of different types of units, and the file downloading library comprises a plurality of file downloading protocols, such as: ftp, sftp, http, etc.
The real-time communication library and the file downloading library run on a basic security barrier layer based on the basic security barrier layer, and data transmission with the fan and the data layer is achieved through the basic security barrier layer. The real-time communication library and the file download library execute different service logic codes to perform data interaction with the fan according to the received different request parameters, acquire a result according to the interaction, and return the result to the data layer. And the data layer performs data screening and mapping on the data and then returns the result to the display layer.
In order to realize communication with different types of fans, the SCADA system performs 'identity coding' on each fan before starting, the 'identity coding' is an identifier representing the fan, and the SCADA system judges which communication protocol needs to be used for 'communication' with the fan according to the identifier of the fan.
The identity code, or the fan identification, includes information representing a real-time communication protocol and a file download protocol supported by the fan. In addition, in order to ensure the uniqueness of the identification, the identification may also comprise a fan-specific code. According to one embodiment, the identity code is a 24-bit representation, wherein the first 14 bits represent the real-time communication protocol library and the last 10 bits represent the file download protocol. If the real-time communication or the file downloading can not be realized through the identity coding, the real-time communication or the file downloading can be realized through the configuration file. The additional information required for communication may be configured in the configuration file.
The following illustrates a fan identification, for example: 0103020001F 4000101050400, wherein (from left to right):
01 denotes a real-time communication protocol
02 denotes the data type
03 denotes a function code
00 denotes the start address
01F4 denotes length (note: this data is 16-system data)
00 denotes whether to read the local configuration file
01 denotes a file download protocol
01 denotes download mode, whether download needs to be verified
05 denotes the number of downloaded files
04 denotes whether the downloaded data is stored in the disk of this time
00 denotes whether to read the local configuration file
Referring to fig. 2 again, when a user request is received from the display layer, for example, the user request may be for fan monitoring, the required data is acquired through the service layer interface, the service layer sends the request to the data layer after receiving the request, the data layer analyzes the request, and when the user request is for acquiring real-time data of the fan or downloading a related file, the fan and a corresponding identifier are acquired from the request, the identifier is analyzed, a corresponding real-time communication protocol or a file downloading protocol is selected according to the identifier, and communication is performed with the corresponding fan through the corresponding protocol, so that real-time communication with the fan or file downloading is realized. If the real-time communication or the file downloading can not be realized through the mode, the communication or the downloading is realized through reading the configuration file. And a communication mode or a file downloading mode for realizing communication with each fan is configured in the configuration file. The user may make modifications to the configuration file. This ensures that communication with each fan is possible, even if communication cannot be achieved based on information contained in the identity of the fan, via a profile modified by the user. Therefore, the implementation mode provided by the invention can realize the compatible communication of various fans without a plurality of communication machines and forwarding servers of a centralized control center in the prior art.
In addition, as in the above example of the fan identifier, the fan identifier also includes information on whether to read the configuration file, including that the real-time communication protocol or the file download protocol both include the information, so when encoding the fan identifier, it may also be specified whether to allow reading the local configuration file, if so, the configuration file may be read for communication, otherwise, the configuration file may not be read for communication, thereby making communication with the fan safer.
In addition, in a data layer, a data compression filing method is adopted for filing some important historical report data, such as wind speed, generating capacity, average active power and other data, when the data across years is inquired, the speed is very low, and in the system, the historical data is processed by using a moving average method, so that the data compression of the date, month and year period of the data is realized. And the compressed data is preferentially inquired during inquiry, if the data is not compressed, the daily archived data can be inquired, and the data compression is carried out on the daily archived data by adopting a moving average method.
Such as wind speed, four types of wind speed data (maximum, minimum, mean, variance) are generated every 5 minutes. 288 data are generated in each type of data one day, 105120 data are generated in one year, if a large amount of data are inquired when the average wind speed of two years is inquired, the speed is slower, the data compression method provided by the invention can solve the problem, and a system can automatically execute a daily moving average method, a monthly moving average method, an annual moving average method and the like of each type of data, and automatically file the daily, monthly and annual average wind speeds.
The moving average method is briefly described as follows:
the formula: # rlocavgvvalue: ((# ilocSampleNum-1) # rlocavgvvalueold + # rInput)/# ilocsampleNum;
wherein: # rlocavgvvalue represents the average value, # ilocSampleNum represents the number of data inquired, # rlocavgvvaluelold is the last average value, # rInput represents the value of the new inquiry.
Examples are:
for the first time: ilocSampleNum 1, rInput 5, and the results: rlocavgvvalue 5,
and (3) for the second time: ilocesamplenum ═ 2, rInput ═ 4, and as a result (rlocAvgValueOld + rInput)/2 ═ 4.5,
and thirdly: ilocesamplenum ═ 3, rInput ═ 3, and as a result, (2 × rlocAvgValueOld + rInput)/3 ═ 4.
The method can calculate the result in the process of inquiring data, does not perform for-loop operation when inquiring a plurality of results, can reduce the consumption of system resources and greatly improve the execution efficiency of the program. In the conventional method, after a complete result is queried, a for-loop traversal is performed, a sum is obtained and then divided by the number of times to calculate a result, and the efficiency is low.
The data compression method proposed by the application includes two methods, wherein the first method is active compression, the active compression does not empty or delete any data, the active compression is realized according to a time point, namely, the data is compressed at a preset time, a daily zero-time system compresses some data filed in the previous day, and the same data in the previous day is compressed into one data by a plurality of data for storage, for example: the data of 5 minutes of the previous day comprise wind speed, average power, power generation amount and the like, each data comprises 288 data, and the data can become 1 data after being compressed, namely the comprehensive data of one day.
The zero moment 1 of each month compresses the data compressed every day again to generate monthly data, for example, after 30 days of daily compression, 30 daily average wind speeds exist, and the monthly compression is to compress the 30 daily average wind speeds into a monthly average wind speed.
The data compressed every month before will be compressed again at the time zero of 1 month 1 every year, and the annual data is generated. The processing principle is the same as that of monthly compression.
Another compression is passive compression, which is triggered by physical storage capacity, and deletes previously archived data, when the database capacity reaches 80% of the hard disk capacity, the system automatically searches whether daily data is already compressed and archived, and if so, exports daily data to a text file, and then empties the database data of the exported data. Clearing the earlier data. Unnecessary waste of database storage space is reduced.
When historical data is stored, the data can be automatically stored according to the quantity and the type of the data in the downloaded file, and when the historical data of a certain fan is inquired, the historical records can be automatically searched from the database. In the data layer, historical data compression filing and a basic security barrier layer are interacted, time of a hardware server is obtained at regular time, whether a task needs to be executed or not is judged according to system time provided by the hardware server, and if the time is up, the compression filing task is executed. If the time is not up, the system will wait.
The foregoing specific examples or embodiments are presented for purposes of illustration only and are not intended to limit the scope of the present disclosure in any way. Modifications to the above-described embodiments or implementations may be made by those skilled in the art without departing from the spirit of the present application, and such modified versions are intended to be within the scope of the present application as claimed.
Claims (12)
1. A wind power plant universal SCADA system is characterized in that:
the system comprises a display layer, a service layer, a data layer, a basic security barrier layer and a data communication layer, wherein the uppermost layer is the display layer, the middle layer is the service layer and the data layer, the lowermost layer is the basic security barrier layer and the data communication layer, the uppermost display layer is responsible for displaying effects, the middle layer is responsible for business logic processing and data processing, and the lowermost layer is responsible for physical connection and communication; the wind farm comprises different types of fans;
the data layer is used for receiving a request forwarded by the service layer and submitted by a user through the display layer, analyzing whether online data or historical data is acquired according to the request, and acquiring the online data or the historical data through the data communication layer if the online data is directly acquired from the data layer;
the data communication layer comprises a real-time communication library and a file downloading library, wherein the real-time communication library is a class library used for carrying out real-time communication with different types of fans, and the file downloading library is a tool class library for downloading log logs of the different types of fans; and the data communication layer is used for selecting a protocol corresponding to the fan from the real-time communication library or the file downloading library according to a request sent from the data layer so as to realize real-time communication or file downloading.
2. A SCADA system according to claim 1 wherein:
the real-time communication library and the file downloading library realize data transmission with the fan and the data layer through a basic security barrier layer; the data communication layer executes different service logic codes to perform data interaction with the fan according to the received different request parameters, obtains a result after interaction, returns the result to the data layer, and returns the result to the display layer after the data layer performs data screening and mapping on the data.
3. A SCADA system according to claim 1 wherein:
the fan comprises a fan identifier, and the fan identifier comprises information representing a real-time communication protocol and a file download protocol supported by the fan.
4. A SCADA system in accordance with claim 3 wherein:
the request is a monitoring request of one or more fans, and the request comprises fan information and required data.
5. A SCADA system according to claim 4, characterized in that:
the data layer is used for analyzing the request, acquiring the fan and a corresponding identifier from fan information of the request when acquiring real-time data of the fan or downloading a related file, analyzing the identifier and selecting a corresponding real-time communication protocol or a file downloading protocol according to the identifier, and the data communication layer is communicated with the corresponding fan through the corresponding protocol to realize real-time communication with the fan or file downloading.
6. A SCADA system according to claim 5, characterized in that:
the data communication layer also comprises a configuration file for recording the fan and a real-time communication protocol and a file downloading protocol corresponding to the fan, and the configuration file can be accessed and modified by a user; and when the data communication layer can not realize communication with the fan through the fan identification, reading the configuration file to communicate with the fan.
7. A SCADA system in accordance with claim 6 wherein:
the real-time communication protocol and the download file protocol of the fan identification both contain information whether to read the configuration file, when the information indicates that the configuration file is read, the data communication layer reads the configuration file to communicate with the fan, otherwise, the data communication layer does not read the configuration file.
8. A SCADA system in accordance with claim 7 wherein:
the real-time communication protocol information of the fan identification comprises information indicating a real-time communication protocol, a data type, a function code, a starting address, a length and whether a configuration file is read or not; the file downloading protocol of the fan identifier comprises information indicating whether to read the local configuration file, indicating a downloading mode of the file downloading protocol, indicating whether to verify downloading, the number of downloaded files, whether to store the downloaded files in the disk and whether to read the configuration file.
9. A SCADA system according to any of the preceding claims, characterized in that:
the data layer is used for compressing and archiving historical data, and the compression is carried out by a moving average method; when the request received by the data layer is to acquire historical data, firstly, the compressed data is inquired, if the data is not compressed, the daily filing data is inquired, and the daily filing data is subjected to data compression by adopting a moving average method.
10. A SCADA system in accordance with claim 9 wherein:
the compression comprises active compression and passive compression, wherein the active compression is to compress data at a preset time, and the passive compression is triggered according to the physical storage capacity to delete the previous archived data.
11. A SCADA system in accordance with claim 10 wherein:
the active compression comprises daily compression, monthly compression and annual compression, wherein the daily compression is to compress the data of the day at a preset moment of each day; the month compression is to compress all day compression data of the current month at a predetermined time of each month; year compression is the compression of data at predetermined times of the year for all months of the year.
12. A SCADA system in accordance with claim 10 wherein:
and the passive compression is to export the earliest compressed and filed data into a text file and empty the database capacity occupied by the exported data when the database capacity reaches a preset percentage of the hard disk capacity.
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| CN108648786A (en) * | 2018-05-16 | 2018-10-12 | 上海术木医疗科技有限公司 | A kind of medical cloud platform data-sharing systems and method based on third party's business |
| CN110138843A (en) * | 2019-04-23 | 2019-08-16 | 迈赫机器人自动化股份有限公司 | A kind of agricultural machinery manufacture Internet of Things monitoring method and system |
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