CN111105208A - Data communication method for source side power plant control logic - Google Patents
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Abstract
The invention discloses a data communication method aiming at control logic of a source side power plant, which is based on graphic image recognition and IEC61850 protocol, develops object-oriented information and communication service modeling, realizes monitoring of production process data and network-related important parameters, and can convert control logic provided by different manufacturers into a unified standard universal file format, thereby realizing verification and audit of the process data, the network-related important parameters and the control logic, improving the working efficiency and ensuring the supervision accuracy; the invention breaks through the traditional manual supervision and inspection mode, can conveniently and quickly carry out logic verification at different time periods, and realizes the on-line data monitoring and analysis of control logic.
Description
Technical Field
The invention belongs to the technical field of grid source coordination of grid-connected power plants, and relates to a data communication method for source side power plant control logic.
Background
With the large-scale access of new energy to the power grid, the operating characteristics of the power grid change profoundly, higher requirements are put forward on the regulation and control capacity of the unit, and the source coordination management of the unit network needs to be strengthened urgently. In order to further strengthen supervision and management on grid-connected power plant grid-related safety and ensure safe and stable operation of a power grid and a generator set, according to eighteen countermeasures, national grid operation criteria (GB/T31464-2015), notice of special grid-connected power plant grid-related safety inspection work of the national energy agency (No. 2016 (2016) for comprehensive energy safety), national grid company grid source coordination management regulations (national grid (Reg/4) 457 + 2014) and other relevant regulations, the whole process of supervision on equipment, test, model parameter simulation check and warehousing management work of the unit is required. The control logic, control parameters and protection fixed values of the network-related equipment cannot be changed without permission of a power grid dispatching mechanism. Changes of the running state, the control logic, the control parameters and the protection fixed value of the grid related equipment are applied to a power grid dispatching mechanism in advance, and the changes can be implemented after approval and the implementation result is reported. The inspection and supervision of the modification of the control logic not only has large workload, but also can cause misjudgment and missed judgment sometimes due to human factors. And establishing an electronic grid-related test control logic, important measuring points and a parameter ledger, thereby comprehensively and timely grasping the latest condition of the source side grid-related equipment and effectively ensuring the consistency of grid source coordination.
Disclosure of Invention
The invention aims to solve the technical problem of providing a data communication method aiming at the control logic of a source side power plant, which can convert the control logic provided by different manufacturers into a uniform standard general file format so as to realize the verification, the verification and the supervision of process data, network-related important parameters and the control logic.
The technical scheme adopted for solving the technical problems is as follows: a data communication method aiming at a source side power plant control logic comprises the steps of establishing a data communication system, wherein the data communication system comprises an image recognition device, a power source side substation, a forwarding workstation and a scheduling side master station; based on an IEC61850 protocol, a description language file YLD for describing control logic configuration is established on the source side based on the control logic of a distributed control system DCS of the thermal power plant, and a data communication method of the control logic is established.
The invention has the beneficial effects that: the invention can convert the control logics of different manufacturers into a unified universal mode, thereby facilitating better technical communication; the invention can realize the verification and the verification of process data, network-related important parameters and control logic, greatly improve the working efficiency and better ensure the supervision accuracy; the invention breaks through the traditional manual supervision and inspection mode, can conveniently and quickly carry out logic verification at different time periods, and realizes the on-line data monitoring and analysis of control logic.
Drawings
Fig. 1 shows a data communication system of a single distributed control system DCS, source-side devices, and power source-side substations of a thermal power plant.
Fig. 2 shows a data communication system of a plurality of distributed control systems DCS, source-side devices, and power source-side substations of a thermal power plant.
FIG. 3 is a block diagram of a logical unit file.
FIG. 4 is a schematic diagram of a dot element portion of a logical unit file.
FIG. 5 is a partial implementation of a connection element between modules of a logical unit file.
FIG. 6 is a schematic front portion of a generic model file.
FIG. 7 is a diagram of the back part of the generic model file.
Detailed Description
As can be seen from the embodiments shown in FIGS. 1-7, a method of data communication to a source side power plant control logic includes the steps of:
(1) establishing a data communication system, wherein the data communication system comprises an image recognition device, a power supply side substation, a forwarding workstation and a scheduling side master station; the distributed control system DCS of the thermal power plant is respectively in bidirectional connection with corresponding ports of the source side equipment and the power source side substation; the input end of the image recognition device is connected with the corresponding output end of the source side equipment; the power supply side substation is connected with the forwarding workstation through a network cable; the forwarding work station is connected with the master station at the dispatching side through a power dispatching data network;
(2) aiming at a source side device, carrying out object-oriented information and communication service modeling based on an IEC61850 protocol, and establishing a description language file YLD for describing control logic configuration based on the control logic of a distributed control system DCS of a thermal power plant at the source side;
(4) based on the information of a source side equipment nameplate scanned by an image recognition device, the source side equipment nameplate KKS code with a unique identifier on the source side equipment nameplate realizes one-to-one correspondence with a DCS control logic KKS code of a thermal power plant, the image recognition device uploads the source side equipment nameplate information to a power source side substation, and the thermal power plant distributed control system DCS uploads the thermal power plant distributed control system DCS data information corresponding to the source side equipment nameplate to the power source side substation; the power source side substation sends the equipment nameplate information, the DCS data information of the distributed control system of the thermal power plant corresponding to the nameplate of the power source side equipment and the description language file YLD to the forwarding workstation in an interactive mode through an IEC61850 protocol;
the DCS logic configuration corresponding to the equipment and the modeled general configuration file of the logic configuration can be clearly known through image recognition, and historical information of the equipment can be presented through image recognition.
(5) The forwarding workstation uploads the data of the power supply side substation to the scheduling side master station in a wave recording mode through an IEC104 protocol through an IEC61850 protocol;
(6) the master station on the dispatching side receives the data of the forwarding work station and stores the data in the database.
The method for modeling the object-oriented information and communication service based on the IEC61850 protocol is as follows:
the method comprises the following steps: establishing a logic unit file LLD of a control logic, wherein the logic unit file comprises more than 1 Module element Module, Point element Point and an inter-Module connection element LogiclLink;
the format description of the logic unit file LLD is as follows:
the root element of the logic unit file is LPCL; the logic unit file comprises a plurality of Module elements, Point elements and inter-Module connection elements, wherein the Module elements represent modules in the control logic, the Point elements represent points in the control logic, and the inter-Module connection elements represent incidence relations between the modules;
the attributes of the module elements comprise an ID number, a module name, a module description desc, a module type Class and a module type, wherein the ID number is a module unique identifier;
one module element contains more than 1 Interface element Interface, parameter element Parameters and view element Views;
the interface element represents input and output channel information of the module; the Input information attribute comprises an Input name, an Input description desc, an Input data type and an Input initial value Starter; the Output information attribute comprises an Output name, an Output description desc, an Output data type and an Output initial value Starter;
the method comprises the steps that parameter information of a parameter element representation module is obtained, and the attribute of the parameter element comprises the name of the parameter, the description desc of the parameter, the data type of the parameter, the default Value of the parameter and the unit Units of the parameter;
the view element represents the size of the module, and is a representation of the space; the attributes of the view elements comprise a graph rect, a line and a text, and the attributes of the graph comprise a graph height, a width, a coordinate x/y, a Color and a shape Style; the attributes of the line include the starting coordinates StartX, StartY, EndX, EndY, Color, shape Style of the line; the attribute of the Text comprises a Text name, a Text coordinate x/y, a Text width, a Text height and a Text color;
the point element attribute comprises an original point OriginalPoint and a middle point MidPoint;
the original point attribute comprises an original point ID, an original point design name, an original point type Class, a point name and a point description desc, wherein the original point type refers to an analog quantity or a digital quantity, and the ID of the original point is a KKS code and is a unique identifier of the point;
the attributes of the intermediate point MidPoint comprise an intermediate point ID, an intermediate point type Class, a point name and a point description desc, wherein the intermediate point type refers to an analog quantity or a digital quantity, and the ID of the intermediate point refers to an intermediate point KKS code and is a unique identification of the point;
the attributes of the connection elements among the modules comprise contact names LinkA at one end of the connecting line, contact names LinkB at the other end of the connecting line and positive and negative Property of contact information, wherein 0 represents that the signal is positive, 1 represents that the signal is negative, and the contact names at the two ends of the connecting line are the ID of the connected module element plus the interface name;
step two: establishing a universal model file YLD file through the logic unit file LLD file;
the universal model file is a model file formed by connecting all logic unit files and files, and the root element of the universal model file is the LPCL; one common model file comprises more than 1 logic unit file and logic unit file connection elements; the attributes of the universal model file comprise a file name, a file description desc and a file model type; the inter-logical unit connection element attribute comprises a module element of one logical unit file and a module element of another logical unit file, and the connection naming rule of the module element of the logical unit file is the ID number of the logical unit plus the ID number of the module element plus the interface name.
The model of the image recognition device is Pixy CMUCam 5); the power supply side substation, the forwarding workstation and the scheduling side master station are computers respectively.
The invention provides a method for electronically checking and auditing process data, network-related important parameters and control logic. Based on image pattern recognition technology, data of a source side device is uploaded, and a YLD file capable of describing a control logic configuration description language file is established at the source side, wherein the YLD file comprises module parameter information, input and output information and associated information between modules. Between a source side power station automation system and a network source coordination control system provided by different manufacturers, the capability description of the switching network source coordination control system and the description of the source side power station automation system form a standard general file format, and finally, the supervision and inspection functions are realized by comparing YLD files at different times. The invention relates to the field of network source coordination, provides a control logic conversion method capable of realizing electronic proofreading and examination by converting a source side system module into a configuration language file based on a graphic image recognition technology and based on an IEC61850 protocol.
The invention aims to provide a method for modeling warehousing, electronic filing, checking and auditing, which improves the current situations that a network-related production test model is simplified and dispersed and does not realize comprehensive warehousing, and establishes an electronic file aiming at the condition that the prior supervision work does not realize file standard systematization; the method is based on a graphic image recognition technology, and is based on an IEC61850 protocol, object-oriented information and communication service modeling is carried out, monitoring and integration of production process data and network-related important parameters are realized, a YLD file capable of describing a control logic configuration description language is established at the source side, the YLD file comprises module parameter information, input and output information and correlation information between modules, control logics provided by different manufacturers can be converted into a uniform standard general file format, and verification, electronic filing verification and auditing of the process data, the network-related important parameters and the control logics are realized by comparing the files.
The invention has the following characteristics: based on an image pattern recognition technology, uploading information through a label of a device at a scanning source side; aiming at the source side equipment, carrying out object-oriented information and communication service modeling based on an IEC61850 protocol, and realizing monitoring and integration of high-capacity production process data and network-related important parameters of a thermal power plant, a gas turbine and new energy power generation; 3, establishing a configuration description language file suitable for communication of the network source coordination system, and describing the capability of the switching network source coordination control system and the description of the source side power station automation system between the source side power station automation system and the network source coordination control system provided by different manufacturers; and 4, establishing proofreading, electronic filing proofreading and auditing based on the data of the online production process, the network-related important parameters and the control logic by taking the data driving + model as a means.
The invention carries out input identification on-site measuring point KKS coding/nameplate information based on an image identification technology, and records the information into a database; aiming at source side equipment, object-oriented information and communication service modeling is carried out based on an IEC61850 protocol, and a data communication system mainly comprises a power supply side substation/SIS, a forwarding workstation, a scheduling side master station, a communication protocol convention and the like. The communication function of the power supply side substation is mainly to acquire real-time data of power generation equipment (DCS) at a high speed and send the data to a forwarding workstation (communication service device) through a data channel by a proposed protocol. The power supply side substation can be upgraded and replaced by the original SIS system of the unit according to actual conditions. The communication function of the forwarding workstation is used for carrying out data acquisition with the power supply side substation through a 61850 protocol on one hand, and on the other hand, the data of the substation is uploaded to the scheduling side main station through a 104+ wave recording mode according to the service function requirement of the scheduling side main station. The communication function of the master station at the dispatching side receives the unit operation data of the forwarding workstation (communication service device) and stores the data in a configured large-capacity database. And each functional module in the master station calls data in the database according to actual requirements to perform system analysis and evaluation. The communication protocol between the main station and the forwarding work station takes an IEC61850 protocol as a blueprint, and aims to complete rapid and stable communication with functions of switching value transmission, analog quantity transmission, fixed value and the like. Through compiling XML language, a YLD file capable of describing control logic configuration description language file is established at the source side, the YLD file comprises module parameter information, input and output information and correlation information between modules, and control logics provided by different manufacturers can be converted into a uniform standard general file format. A logic diagram is a logic model node, the node comprises a plurality of Module nodes and a LogiClink node, the Module represents a Module, the ID is the unique identification of the Module, the Module type (Class), the Module name (name), the Module description (desc), the Module type (type), and the Func functional description, namely the functional description of the Module, the Interface description, how many interfaces represent how many sub-nodes, Parameters parameter description represents the parameter information of the Module, the LogiClink represents a logic connecting line, represents the incidence relation between the Module and the Module, and the logic diagram provided by a manufacturer is converted into the language; and establishing proofreading, electronic filing proofreading and auditing based on online production process data, network-related important parameters and control logic by taking a data driving + model as a means.
The invention provides a general modeling method for power plant control logic, aiming at the current situation that the current grid-related production test model is simplified and dispersed and does not realize comprehensive warehousing. The method establishes the YLD capable of describing the control logic module and the associated configuration file based on IEC61850, and configures the modules and the associated configuration file in the control logic provided by different manufacturers into a unified and universal file format through the YLD file, so that electronic filing and proofreading of the control logic can be realized, and the auditing, checking and technical supervision of the control logic are facilitated.
The object-oriented information and communication service modeling technical solution based on the IEC61850 protocol is described in detail with reference to fig. 3-7.
The method comprises the following steps: and establishing a logic unit file (LLD file) of the control logic, wherein the logic unit file comprises a plurality of Module elements (Module), Point elements (Point) and inter-Module connection elements (LogiclLink).
Step two: a common model file (YLD file) is created by the logical unit file (LLD file).
The format description of the logical unit file (LLD file) in the step one is as follows:
the root element of the logic unit file is LPCL; the logic unit file comprises a plurality of Module elements (modules), Point elements (points) and inter-Module connection elements (LogiclLink), wherein the Module elements represent modules in the control logic, the Point elements represent points in the control logic, and the inter-Module connection elements represent association relations between the modules.
The attributes of the module element include an ID number (ID), a module name (name), a module description (desc), a module type (Class), and a module model number (type), where the ID number is a unique identifier of the module.
A module element may contain a plurality of Interface elements (interfaces), parameter elements (Parameters), and view elements (Views).
The interface element represents input and output channel information of the module. The Input information attribute includes an Input name (name), an Input description (desc), an Input data type (type), and an Input initial value (Starter); the Output (Output) information attribute includes an Output name (name), an Output description (desc), an Output data type (type), and an Output initial value (Starter).
The parameter element characterizes parameter information of the module, and its attributes include the name (name) of the parameter, the description (desc) of the parameter, the data type (type) of the parameter, the default Value (Value) of the parameter, and the Units (Units) of the parameter.
The view element represents the size of the module and is a representation of the space. The attributes of the graph comprise a graph (rect), a line (line) and a text (text), and the attributes of the graph comprise a graph height (height), a width (width), a coordinate (x/y), a Color (Color) and a shape (Style); the attributes of the line include the start coordinates (StartX, StartY, EndX, EndY), Color (Color), shape (Style) of the line; the Text attribute comprises a Text name (Text name), a Text coordinate (x/y), a Text width (width), a Text height (height) and a Text color (color);
the point element attributes include an origin point (OriginalPoint) and a middle point (MidPoint).
Wherein the original point attribute comprises an original point ID, an original point design name (DesignName), an original point type (Class), a point name (name) and a point description (desc), the original point type refers to an analog quantity or a digital quantity, the ID of the original point is a KKS code and is a unique identifier of the point,
the intermediate point attribute comprises an intermediate point ID, an intermediate point type (Class), a point name (name) and a point description (desc), wherein the intermediate point type refers to an analog quantity or a digital quantity, and the ID of the intermediate point refers to an intermediate point KKS code and is a unique identification of the point.
The attributes of the connection elements between the modules comprise contact names (LinkA) at one end of the connecting line, contact names (LinkB) at the other end of the connecting line and the positive and negative (Property) of contact information, wherein 0 represents that the signal is positive and 1 represents that the signal is negative, and the contact names at the two ends of the connecting line are the ID of the connected module element plus the interface name.
For example: one end of the inter-module connection element is DQAM06/OL, DQAM06 represents the ID number of the connected module element, and OL represents the interface name of the connected module.
As shown in fig. 3-5, the lower part logic unit file of the rural power plant and the time control system is taken as an embodiment.
As shown in fig. 3-5, the logical unit file is a module element, a point element, and an inter-module connection element whose root elements are LPCL.
In fig. 3, Module represents a Module element, ID corresponding to the Module element represents an ID number of the Module element, "quality judgment" represents a description corresponding to the Module element, "DQAM" represents a type (Class) of the Module element, and fig. 1 represents a Module whose ID is DQAM06, which is a quality judgment Module. The module element with ID DQAM06 contains 7 interface elements, 3 of which are inputs and 4 outputs. The interface element is 'IN' and is an input end, the description (desc) of the interface element is analog input, the data type (type) is REAL type, and no initial value (Starter); the name of the interface element is 'OH', the name is an Output end (Output), the description (desc) is 'high-limit Output', the data type (type) is 'boot' type, and the initial value (Starter) is 0; and the rest input and output ends are analogized in the same way. Parameters represents parameter elements, which are parameter information of module elements, and a module with ID DQAM06 has four parameter elements. The name (Date name) of parameter element 1 is "LL", its description (desc) is "constant lower bound", its data type (type) is "REAL", and by default "150", in degrees celsius (° c), and so on for the other three parameter elements. Views represents a view element that characterizes the size of the graph of the module. The attributes of the graph comprise a graph (rect), a line (line) and a text (text), and the attributes of the graph comprise a graph height (height), a width (width), a coordinate (x/y), a Color (Color) and a shape (Style); the attributes of the line include the start coordinates (StartX, StartY, EndX, EndY), Color (Color), shape (Style) of the line; the Text attribute comprises a Text name (Text name), a Text coordinate (x/y), a Text width (width), a Text height (height) and a Text color (color); the graph of the view element of fig. 1 represents a rectangle (hollowgraph) whose height is "60", width is "20", coordinate point (x = "10" y = "20"), there are 7 lines of information, there are several lines of information for several interface elements, the name of the text is "DQAM", the coordinate position (x = "10" y = "20") is "20" in width, and "20" in height.
Fig. 4 shows a point element, which contains an origin point (OriginalPoint) and a middle point (MidPoint), and in this example contains 4 origin points, whose ID numbers are B03M01ATEZ31, B03M01ATEZ32, B03M01ATEZ41, and B03M01ATEZ42, which are described as "a grind 1# main bearing temperature", "a grind 2# main bearing temperature", "a grind 3# main bearing temperature", "a grind 4# main bearing temperature", and the data types are all Analog quantities (Analog); in this example, there is an intermediate point whose ID number is "B03M01A15R", which represents "A pulverizer bearing temperature < 50 ℃ C", which is a numerical quantity (Digital).
Fig. 5 shows connection elements between modules, the attributes of the connection elements between modules include the contact name (LinkA) at one end of the connection line, the contact name (LinkB) at the other end of the connection line, and the plus or minus (ProPerty) of the contact information, 0 indicates that the signal is positive, 1 indicates that the signal is negative, and the contact names at both ends of the connection line are the ID of the connected module element plus the interface name. In this example, one end of the connecting line can be the origin or some output port of the module element, and the other end of the connecting line is the input port of the module, e.g.
< logiclllink link = "B03M01ATEZ31" ProPertyA = "0" link B = "DQAM06/IN" ProPertyB = "0"/> denotes that the original point described as "a mill 1# main bearing temperature" is connected forward to the "IN" port (analog input port) of the module element with ID number "DQAM 06"; < LogiclLink link = "DQAM09/OL" ProPertyA = "0" link b = "And22/In4" ProPertyB = "0"/> denotes that the output port "OL" (lower limit output) with ID number "DQAM 09" is forward connected to the input port "In 4" with ID number "ad 22".
Step three: the description format of the general model file (YLD file) is:
the universal model file is a model file formed by connecting all logic unit files and files, and the root element of the universal model file is the LPCL; a common model file including a plurality of logical unit files and logical unit inter-file connection elements; the attributes of the universal model file comprise a file name (name), a file description (desc) and a file model (type); the attribute of the connection element between the logic units comprises a module of one logic unit file and a module of the other logic unit file, and the connection naming rule of the module elements of the two different logic unit files is the ID number of the logic unit plus the module ID number plus the interface name. For example: one end of the connection element is SCS03/DQAM06/OL, SCS03 represents the ID number of the logic unit, DQAM06 represents the ID number of the connected module element, OL represents the interface name of the connected module.
Fig. 6-7 illustrate a generic model file (LLD file) for a rural power plant and a time control system.
The LPCL is a root element, and the generic model file includes a plurality of logical unit files and connection elements between logical units, where the logical unit file is the content of the import step two. The connection elements between logical units are added manually by themselves.
Step four: establishing a general model file for the control logics provided by different manufacturers according to the previous steps to realize electronic filing of the control logics; the control logics at different times are modeled, the proofreading of the control logics can be quickly and accurately realized by comparing model files, and whether changes exist is checked, so that supervision and inspection are realized.
The invention provides a method for electronically checking, archiving and auditing process data, network-related important parameters and control logic. Based on image pattern recognition technology, data of a source side device is uploaded, and a YLD file capable of describing a control logic configuration description language file is established at the source side, wherein the YLD file comprises module parameter information, input and output information and associated information between modules. Between a source side power station automation system and a network source coordination control system provided by different manufacturers, the capability description of the switching network source coordination control system and the description of the source side power station automation system form a standard general file format, and finally, the supervision and inspection functions are realized by comparing YLD files at different times.
The above-described embodiments are merely preferred examples of the present invention and are not exhaustive of the possible embodiments of the present invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. A data communication method aiming at a source side power plant control logic is characterized in that: establishing a data communication system, wherein the data communication system comprises an image recognition device, a power supply side substation, a forwarding workstation and a scheduling side master station; based on an IEC61850 protocol, a description language file YLD for describing control logic configuration is established on the source side based on the control logic of a distributed control system DCS of the thermal power plant, and a data communication method of the control logic is established.
2. The data communication method for the source-side power plant control logic according to claim 1, characterized in that the data communication method for constructing the control logic is as follows:
(1) aiming at a source side device, carrying out object-oriented information and communication service modeling based on an IEC61850 protocol, and establishing a description language file YLD for describing control logic configuration based on the control logic of a distributed control system DCS of a thermal power plant at the source side;
(2) based on the information of a source side equipment nameplate scanned by an image recognition device, the source side equipment nameplate KKS code with a unique identifier on the source side equipment nameplate realizes one-to-one correspondence with a DCS control logic KKS code of a thermal power plant, the image recognition device uploads the source side equipment nameplate information to a power source side substation, and the thermal power plant distributed control system DCS uploads the thermal power plant distributed control system DCS data information corresponding to the source side equipment nameplate to the power source side substation; the power source side substation sends the equipment nameplate information, the DCS data information of the distributed control system of the thermal power plant corresponding to the nameplate of the power source side equipment and the description language file YLD to the forwarding workstation in an interactive mode through an IEC61850 protocol;
(5) the forwarding workstation uploads the equipment nameplate information, the DCS data information of the distributed control system of the thermal power plant corresponding to the source side equipment nameplate and the description language file YLD to the master station at the dispatching side in a wave recording mode through an IEC104 protocol through an IEC61850 protocol;
(6) and the master station at the dispatching side receives the equipment nameplate information of the forwarding workstation, the DCS data information of the thermal power plant distributed control system corresponding to the source side equipment nameplate and the description language file YLD and stores the data in the database.
3. The data communication method for the source-side power plant control logic according to claim 2, characterized in that the object-oriented information and communication service modeling method based on the IEC61850 protocol is as follows:
the method comprises the following steps: establishing a logic unit file LLD of a control logic, wherein the logic unit file comprises more than 1 Module element Module, Point element Point and an inter-Module connection element LogiclLink;
step two: establishing a universal model file YLD file through the logic unit file LLD file;
the universal model file is a model file formed by connecting all logic unit files and files, and the root element of the universal model file is the LPCL; one common model file comprises more than 1 logic unit file and logic unit file connection elements; the attributes of the universal model file comprise a file name, a file description desc and a file model type; the inter-logical unit connection element attribute comprises a module element of one logical unit file and a module element of another logical unit file, and the connection naming rule of the module element of the logical unit file is the ID number of the logical unit plus the ID number of the module element plus the interface name.
4. The data communication method for the source-side power plant control logic according to claim 3, characterized in that: the format description of the logical unit file LLD is: the root element of the logic unit file is LPCL; the logic unit file comprises a plurality of Module elements, Point elements and inter-Module connection elements, wherein the Module elements represent modules in the control logic, the Point elements represent points in the control logic, and the inter-Module connection elements represent incidence relations between the modules;
the attributes of the Module element Module comprise an ID number, a Module name, a Module description desc, a Module type Class and a Module type, wherein the ID number is a Module unique identifier;
a module element contains more than 1 Interface element Interface, parameter element Parameters and view element Views.
5. The data communication method for the source-side power plant control logic according to claim 4, characterized in that: the Interface element Interface represents the input and output channel information of the module; the Input information attribute comprises an Input name, an Input description desc, an Input data type and an Input initial value Starter; the Output information attributes include an Output name, an Output description desc, an Output data type, and an Output initial value start.
6. The data communication method for the source-side power plant control logic according to claim 5, characterized in that: the parameter element Parameters represents the parameter information of the module, and the attribute of the parameter element comprises the name of the parameter, the description desc of the parameter, the data type of the parameter, the default Value of the parameter and the unit Units of the parameter.
7. The data communication method for the source-side power plant control logic according to claim 6, characterized in that: the view element Views represents the size of the module and is a representation of the space; the attributes of the view elements comprise a graph rect, a line and a text, and the attributes of the graph comprise a graph height, a width, a coordinate x/y, a Color and a shape Style; the attributes of the line include the starting coordinates StartX, StartY, EndX, EndY, Color, shape Style of the line; the attribute of the Text comprises a Text name, a Text coordinate x/y, a Text width, a Text height and a Text color.
8. The data communication method for the source-side power plant control logic according to claim 7, characterized in that: the Point element Point attribute comprises an original Point OriginalPoint and an intermediate Point MidPoint;
the origin point attribute comprises an origin point ID, an origin point design name, an origin point type Class, a point name and a point description desc, wherein the origin point type refers to an analog quantity or a digital quantity, and the ID of the origin point is a KKS code and is a unique identifier of a point;
the attributes of the intermediate point MidPoint comprise an intermediate point ID, an intermediate point type Class, a point name and a point description desc, wherein the intermediate point type refers to an analog quantity or a digital quantity, and the ID of the intermediate point refers to an intermediate point KKS code and is a unique identification of the point.
9. The data communication method for the source-side power plant control logic according to claim 8, characterized in that: the inter-module connection element LogiclLink attribute comprises a contact name LinkA at one end of a connecting line, a contact name LinkB at the other end of the connecting line and the positive and negative Property of contact information, wherein 0 represents that a signal is positive, 1 represents that the signal is negative, and the contact names at the two ends of the connecting line are the ID of a connected module element plus an interface name.
10. The data communication method for the source-side power plant control logic according to claim 9, characterized in that: in a data communication system, a distributed control system DCS of a thermal power plant is respectively in bidirectional connection with corresponding ports of a source side device and a power source side substation; the input end of the image recognition device is connected with the corresponding output end of the source side equipment; the power supply side substation is connected with the forwarding workstation through a network cable; the forwarding work station is connected with the master station at the dispatching side through a power dispatching data network; the model of the image recognition device is Pixy CMUCam 5; the power supply side substation, the forwarding workstation and the scheduling side master station are computers respectively.
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