CN110995774B - Universal SCADA system for wind farm - Google Patents
Universal SCADA system for wind farm Download PDFInfo
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- CN110995774B CN110995774B CN201910944358.2A CN201910944358A CN110995774B CN 110995774 B CN110995774 B CN 110995774B CN 201910944358 A CN201910944358 A CN 201910944358A CN 110995774 B CN110995774 B CN 110995774B
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- 238000004891 communication Methods 0.000 claims abstract description 104
- 230000004888 barrier function Effects 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims description 44
- 230000006835 compression Effects 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 13
- 230000003993 interaction Effects 0.000 claims description 7
- 238000013144 data compression Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000013500 data storage Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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Classifications
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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 barrier 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 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; 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 the 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 devices, 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 general SCADA system for a wind farm.
Background
As the installed quantity of the wind farm is larger and larger, when wind turbines of different factories are installed in the wind farm, a plurality of different monitoring systems must be installed on site, and due to different design factories of the monitoring systems, functions, interfaces, data, operation and the like of each set of monitoring systems 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 generated energy of the whole-field unit are required to be inquired, each set of monitoring system is required to be operated to obtain the data of the corresponding unit, and then the data are summarized and arranged, so that the efficiency is lower in production.
At present, a centralized control center is used for monitoring all devices, however, the centralized control center needs to be provided with a plurality of communication management machines to realize data communication, a data forwarding server is needed to realize data forwarding, the read data quantity is relatively small, and real-time data is generally used in archiving. Therefore, the centralized control center in the prior art has higher communication cost, smaller data volume capable of being processed and inapplicable to wind power plant monitoring.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a general SCADA system suitable for a wind farm consisting of various fans.
According to one aspect of the invention, a general SCADA system for a wind farm is provided, the system comprises a display layer, a service layer, a data layer, a basic barrier layer and a data communication layer, wherein the uppermost layer is the display layer, the middle layer is the service layer, the data layer, the lowermost layer is the basic barrier layer and the data communication layer, 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 fans of different types; the data layer is used for receiving a request submitted by a user through the presentation layer and forwarded by the service layer, analyzing whether to acquire online data or historical data according to the request, if the online data is acquired directly from the data layer, acquiring the online data through the data communication 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 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; 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 the 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 the basic barrier layer; and the data communication layer executes different business logic codes to perform data interaction with the fan according to the received different request parameters, and returns the result to the data layer according to the obtained result after the interaction, and the data layer performs data screening and mapping on the data and returns the result to the display layer.
According to one aspect of the invention, the blower includes a blower identification that includes information representative of a real-time communication protocol supported by the blower and a file download protocol.
According to one aspect of the invention, the request is a request for monitoring one or more fans, the request including fan information and required data.
According to one aspect of the invention, the data layer is configured to analyze the request, and when acquiring real-time data of a fan or downloading a related file, acquire the fan and a corresponding identifier from fan information of the request, analyze the identifier, and select a corresponding real-time communication protocol or a file downloading protocol according to the identifier, where the data communication layer communicates with the corresponding fan through the corresponding protocol, so as to implement real-time communication with the fan or file downloading.
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 downloading protocol corresponding to the fan, wherein the configuration file can be accessed and modified by a user; and when the data communication layer cannot realize communication with the fan through the fan identification, the configuration file is read 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 contain information about 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 identifier includes 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 identification comprises information indicating whether a local configuration file is to be read, indicating a downloading mode of the file downloading protocol, whether downloading needs to be verified, the number of the downloaded files, whether the downloaded files are stored in a current magnetic disk or not, and whether the configuration file is to be read or not.
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 querying the compressed data, querying daily archive data if the data is not compressed, and compressing the daily archive data by adopting a moving average method.
According to one aspect of the invention, the compression includes active compression and passive compression, wherein the active compression compresses data at a predetermined time, the passive compression is triggered according to physical storage capacity, and the prior archive data is deleted.
According to one aspect of the invention, the active compression includes day compression, month compression, and year compression, wherein day compression is compressing the day data at a predetermined time of day; month compression is to compress all day compression data of the month at a predetermined time of the month; year compression is the compression of all months of the year at a predetermined time of year.
According to one aspect of the invention, the passive compression is to export the earliest compressed archived data into text files when the data storage capacity reaches a predetermined percentage of the hard disk capacity, and empty the data storage capacity occupied by the exported data.
The invention uses a set of general SCADA system which can be compatible with various wind turbines of different factories, realizes the direct collection and control of the data of the wind turbines, realizes a centralized central monitoring system of the wind power plant, can solve the problems of non-uniform data, functions, reports and the like on site, difficult and complex use operation, and also solves the problems of more communication devices, small supported data quantity and unsuitable archiving mode for the data of the wind turbines in the prior art.
Drawings
FIG. 1 illustrates a schematic architecture of a wind farm generic SCADA system according to one embodiment of the present invention;
fig. 2 shows a data interaction procedure according to the SCADA system shown in fig. 1.
Detailed Description
Referring first to FIG. 1, a schematic diagram of the architecture of a wind farm generic SCADA system (Supervisory Control And Data Acquisition system, i.e., data acquisition and monitoring control system) according to one embodiment of the present invention is shown. As shown in fig. 1, the universal SCADA system comprises five layers: the system comprises a display layer, a service layer, a data layer, a basic 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 barrier layer and the data communication layer. The uppermost layer is responsible for exhibiting effect, the middle layer is responsible for the business logic processing layer and the data processing layer, and the lowest layer is responsible for the physical connection and the communication layer.
The uppermost layer, namely the fifth layer 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 running the storage mode of the data and the data archiving method.
The lowest layer comprises a basic barrier layer and a data communication layer, wherein the basic barrier layer is a hardware support of a 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 service logic definition according to the user's requirement, and call the service layer interface according to the requirement to obtain the required data, the service layer may send the requirement to the data layer again after receiving the request of the presentation layer, 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", call the data communication layer interface again to obtain data, if the received request is to obtain "historical data", it will not send the request to the data communication layer, and will automatically obtain data from the layer, and then return the data result.
In order to monitor various fans of the wind power plant, a data communication layer of the SCADA system shown in fig. 1 comprises a real-time communication library and a file downloading library.
The real-time communication library is a class library for real-time communication with different types of units, and comprises a plurality of industrial communication protocols, such as: opc, opcua, modbus, 104, etc., while the file download library is a tool class library for downloading log logs of different types of units, and contains multiple file download protocols, such as: ftp, sftp, http, etc.
The real-time communication library and the file downloading library run on the basic barrier layer based on the basic barrier layer, and realize data transmission with the fan and the data layer through the basic barrier layer. The real-time communication library and the file downloading library execute different business logic codes to interact data with the fan according to different received request parameters, obtain results according to interaction, and return the results to the data layer. The data layer performs data screening and mapping on the data and returns the result to the display layer.
In order to realize communication with different types of fans, the SCADA system can carry out identity coding on each fan before starting, the identity coding is the identification of the fan, and the SCADA system can judge which communication protocol needs to be used for carrying out communication with the fan according to the identification of the fan.
The identity code, or fan identification, includes information representing the real-time communication protocol and file download protocol supported by the fan. In addition, to ensure the uniqueness of the identification, the identification may also include a fan-specific code. According to one embodiment, the identity code is a 24-bit long 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. Additional information required for communication may be configured in the configuration file.
The following illustrates a fan logo, for example: 01 03 02 00 01F4 00 01 01 05 04 00, wherein (left to right):
01 denotes a real-time communication protocol
02 denotes a data type
03 denotes a function code
00 represents the start address
01F4 represents the length (note: this data is 16-ary data)
00 indicates whether the local profile is to be read
01 denotes a file download protocol
01 indicates the download mode, whether the download needs to be verified
05 represents the number of downloaded files
04 indicates whether to save on the current disk after downloading
00 indicates whether the local profile is to be read
Referring to fig. 2 again, when a user request is received from the presentation layer, for example, the user request can be monitored for a fan, the service layer can obtain required data through a service layer interface, the service layer sends the request to the data layer after receiving the request, the data layer analyzes the request, when the user request is for obtaining real-time data of the fan or downloading related files, the fan and corresponding identification are obtained from the request, the identification is analyzed, a corresponding real-time communication protocol or file downloading protocol is selected according to the identification, and the user request is communicated 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 in the mode, the communication or the downloading can be realized by 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 corrections to the configuration file. This way it is ensured that communication with each fan is enabled, even if communication is not enabled based on information contained by the identification of the fan, through the user-corrected profile. Therefore, the implementation mode provided by the invention can realize 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 the above illustration of the fan identifier, the fan identifier also includes information about whether to read the configuration file, including the real-time communication protocol or the file downloading protocol, so that when the fan identifier is encoded, whether to allow the local configuration file to be read can be specified, if so, the configuration file can be read for communication, and otherwise, the configuration file cannot be read for communication, so that the communication with the fan is safer.
In addition, in the data layer, some important historical report data are archived by adopting a data compression archiving method, such as data of wind speed, generated energy, average active power and the like, the speed is very slow when the annual data are inquired, and in the system, the historical data are 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 preferentially inquiring the compressed data during inquiring, inquiring daily archived data if the compressed data is not available, and compressing the daily archived data by adopting a moving average method.
Such as wind speed, four types of wind speed data (maximum, minimum, average, variance) are generated every 5 minutes. 288 data can be generated in each type of data in one day, 105120 data can be generated in one year, if a large amount of data can be queried when the average wind speed of two years is queried, the speed is low, the data compression method provided by the invention can solve the problems, and the system can automatically execute the daily moving average method, the month moving average method, the year moving average method and the like of each type of data to automatically file the average wind speed of the day, month and year.
The moving average method is briefly described as follows:
the formula: #rloconvgvalue: = (# iloc samplenum-1) # rloconvgvalueold + # rInput)/# iloc samplenum;
wherein: #rlocoavgvalue represents the average value, # ilocsomplemum represents the number of data queried, #rlocoavgvalue old is the last average value, and #rInput represents the value of the new query.
Examples:
the first time: ilocsomplenum=1, rinput=5, as a result: rlocoavgvalue=5,
second time: ilocsomplenum=2, rinput=4, and as a result (rlocoavgvalueold+rinput)/2=4.5,
third time: ilocsomplenum=3, rinput=3, and as a result (2×rlocoavgvalueold+rinput)/3=4.
The method can calculate the result in the process of inquiring the data, does not carry out for-loop operation when inquiring a plurality of results, can reduce the consumption of system resources and greatly improves the execution efficiency of the program. The common method is to search the complete result and then to traverse for circulation, calculate the result by dividing the sum and then to calculate the result by times, and the efficiency is low.
The data compression method provided by the application comprises two modes, wherein the first mode is active compression, the active compression cannot empty or delete any data, the active compression is realized according to a time point, namely, the data is compressed at a preset moment, a zero-moment system of each day can compress some data filed in the previous day, and the same data in the previous day is compressed into one data by a plurality of compression modes, such as: the 5 minutes data of the previous day include wind speed, average power, power generation capacity and the like, 288 data are provided for each data, and the data are changed into 1 data after compression, namely one-day comprehensive data.
The data compressed daily before is compressed again at zero time 1 of each month to generate month data, for example, 30 days of daily compression, 30 average wind speeds exist, and the month compression is to compress the 30 average wind speeds into one average wind speed.
The data compressed each month before will be compressed again at time zero of 1 month 1 each year to generate year data. The principle of treatment is the same as that of month compression.
Another type of compression is passive compression, which is triggered by physical storage capacity, and passive compression deletes previously archived data, and when the data storage capacity reaches, for example, 80% of the hard disk capacity, the system automatically searches whether daily data has already been compressed and archived, and if so, exports the daily data to a text file, and then empties the database data of the exported data. The earlier data is emptied. Unnecessary waste of database storage space is reduced.
When the historical data is stored, the historical data is automatically stored according to the number and the type of the data in the downloaded file, and when the historical data of a certain fan is queried, the historical record is automatically searched from a database. In the data layer, the compression archiving of the historical data and the interaction between the base barrier layer can regularly acquire the time of the hardware server, judge whether to execute the task according to the system time provided by the hardware server, and execute the compression archiving task if the time is up. If the time is not up, waiting is performed.
The foregoing specific examples or embodiments are presented for illustrative purposes only and are not in themselves limiting the scope of the present application. Those skilled in the art can make modifications to the above embodiments or implementations without departing from the spirit of the present application, and such modifications are also within the scope of the present application.
Claims (1)
1. A universal SCADA system for a wind farm, characterized by:
the system comprises a display layer, a service layer, a data layer, a basic 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 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 fans of different types;
the data layer is used for receiving a request submitted by a user through the presentation layer and forwarded by the service layer, analyzing whether to acquire online data or historical data according to the request, if the online data is acquired directly from the data layer, acquiring the online data through the data communication 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 for carrying out real-time communication with different types of fans and comprises a plurality of industrial communication protocols, and the file downloading library is a tool class library for downloading log logs of different types of fans and comprises a plurality of file downloading protocols; the data communication layer is used for selecting a protocol corresponding to the fan from a real-time communication library or a file downloading library according to the request sent from the data layer so as to realize real-time communication or file downloading;
the fan comprises a fan identifier, wherein the fan identifier comprises information representing a real-time communication protocol and a file downloading protocol supported by the fan;
the request is a monitoring request of one or more fans, and the request comprises fan information and required data;
the data layer is used for analyzing the request, when acquiring real-time data of the fan or downloading related files, acquiring the fan and corresponding identifiers from the fan information of the request, analyzing the identifiers and selecting corresponding real-time communication protocols or file downloading protocols according to the identifiers, and the data communication layer communicates with the corresponding fan through the corresponding protocols to realize real-time communication with the fan or file downloading;
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, wherein the configuration file can be accessed and modified by a user; when the data communication layer cannot realize communication with the fan through the fan identification, the configuration file is read to communicate with the fan;
the real-time communication protocol and the download file protocol of the fan identifier 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;
the real-time communication library and the file downloading library realize data transmission with a fan and a data layer through a basic barrier layer; the data communication layer executes different business logic codes to perform data interaction with the fan according to different received request parameters, the result is returned to the data layer according to the obtained result after interaction, and the data layer returns the result to the display layer after data screening and mapping are performed on the data;
the real-time communication protocol information of the fan identifier comprises information representing 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 identification comprises information which indicates whether a local configuration file is to be read, indicates that the file downloading protocol indicates a downloading mode, and indicates whether downloading is required to be verified, the number of the downloaded files, whether the downloaded files are stored in a current magnetic disk or not and whether the configuration file is to be read or not;
the data layer is used for compressing and archiving historical data, and the compression is carried out by a moving average method; when a request received by a data layer is to acquire historical data, firstly inquiring the compressed data, inquiring daily archive data if the data is not compressed, and carrying out data compression on the daily archive data by adopting a moving average method;
the compression comprises active compression and passive compression, wherein the active compression is to compress data at a preset moment, the passive compression is triggered according to the physical storage capacity, and the prior archive data is deleted;
the active compression includes day compression, month compression, and year compression, wherein day compression is compressing the day data at a predetermined time of day; month compression is to compress all day compression data of the month at a predetermined time of the month; year compression is compressing all month compressed data of the same year at a predetermined time of year;
the passive compression is to export the earliest compressed and archived data into text files when the data base capacity reaches a predetermined percentage of the hard disk capacity, and empty the data base capacity occupied by the exported data.
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