CN111934902A - Modeling method for power grid and user bidirectional interactive service communication data - Google Patents
Modeling method for power grid and user bidirectional interactive service communication data Download PDFInfo
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- CN111934902A CN111934902A CN202010590248.3A CN202010590248A CN111934902A CN 111934902 A CN111934902 A CN 111934902A CN 202010590248 A CN202010590248 A CN 202010590248A CN 111934902 A CN111934902 A CN 111934902A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/04—Network management architectures or arrangements
- H04L41/044—Network management architectures or arrangements comprising hierarchical management structures
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
Abstract
The invention discloses a modeling method for bidirectional interactive service communication data between a power grid and a user. The problems of multiple diversified bidirectional interactive service data acquisition modes, scattered positions, huge data volume and difficult information sharing in the prior art are solved; the invention comprises the following steps: s1, analyzing the power service user demand and the communication data demand; s2: based on the analyzed requirements, a network structure of the bidirectional interactive service communication system containing an information hierarchical structure is established according to the communication standard; s3: and constructing a data model and expanding the data model according to the communication standard. According to the power service user requirements obtained through analysis, modeling and expanding are carried out according to the IEC61850 standard, the method has strong expansibility and strong scene adaptability, and the two-way interaction requirements of the power grid and various power user services are met.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a modeling method for bidirectional interactive service communication data between a power grid and a user.
Background
The 'smart grid' plan of China is released by a national grid company in 2009, and in the electricity utilization link of a smart grid, the technology of the internet of things is mainly oriented to intelligent electricity utilization and interaction technology and supported by a bidirectional, high-speed and safe data communication network, and is applied to the aspects of intelligent electricity utilization service, electricity utilization information acquisition, intelligent large customer service, electric vehicle charging and battery replacement, an intelligent business hall, demand side management and energy efficiency evaluation, green machine room environment management, power environment monitoring and the like, so that the flexible access, plug and play and the bidirectional interaction with customers of the power grid are realized, the power supply reliability and the power utilization efficiency are improved, the service level of a power supply enterprise is improved, and the technical support is provided for the national energy conservation and emission reduction strategy.
For example, a "network terminal communication system" disclosed in chinese patent literature, whose publication number CN104505938B includes a power consumption terminal, an information acquisition module, a local centralized processor, a GPRS module, and a remote monitoring center, which are connected in sequence, where the information acquisition module acquires data information of the power consumption terminal, and gathers the data information of the power consumption terminal into the local centralized processor, and establishes connection with a GPRS network through the GPRS module, and transmits the data information to the remote monitoring center; and the remote monitoring center analyzes and processes the data information transmitted by the power utilization terminals and then sends the control instruction back to the corresponding power utilization terminal.
However, the monitoring data of the internet of things in the application of the smart grid are less, and the states and the environment of the device and the system are not comprehensively sensed; the sensor is standardized, and the practical level needs to be improved; the communication mode and protocol of the existing application system are not uniform, and the standardized collection and transmission of data are difficult to realize; and the support for bidirectional interactive services such as distributed power supply grid connection, electric vehicle operation, mobile marketing and the like is insufficient.
Disclosure of Invention
The invention mainly solves the problems of multiple data acquisition modes, scattered positions, huge data volume and difficult information sharing of diversified two-way interactive services in the prior art; the method for modeling the communication data of the power grid and the user bidirectional interactive service needs to be combined by key technologies such as a data acquisition and control overall architecture based on the technology of the internet of things, a bidirectional interactive service data acquisition control strategy and communication protocol based on the internet of things, a bidirectional service data modeling and data interaction method and the like, so that the fusion capability of bidirectional interactive service data acquisition and interaction is promoted.
The technical problem of the invention is mainly solved by the following technical scheme:
the invention comprises the following steps:
s1, analyzing the power service user demand and the communication data demand;
s2: based on the analyzed requirements, a network structure of the bidirectional interactive service communication system containing an information hierarchical structure is established according to the communication standard;
s3: and constructing a data model and expanding the data model according to the communication standard.
According to the scheme, the required data is specified according to the requirements obtained by analysis and the communication standard, different node data is defined according to different types, the data is processed more orderly and the required data is clear, the problems of multiple data acquisition modes, scattered positions, huge data volume, difficult information sharing and the like of diversified bidirectional interactive service can be solved, and the fusion capability of bidirectional interactive service data acquisition and interaction is promoted.
Preferably, the power service user requirements include functional requirements of large customer service, residential user service, mobile operation service, electric vehicle service and distributed power generation/energy storage service.
The method has the advantages that each service unit contained in the power service user requirements is analyzed, a model established according to the communication standard can adapt to various power services, and the adaptability and the universality are high.
Preferably, the network structure of the communication system comprises a station control layer, a spacer layer and a process layer;
the process layer comprises a plurality of terminal data acquisition devices, and completes the acquisition of analog quantity, the input/output of switching value and the transmission of operation control commands;
the interlayer comprises a terminal acquisition metering fusion module and a data interaction module;
the station control layer comprises a control center, completes management control on the spacer layer equipment, and is in communication connection with the service support platform through the power data network.
A network structure of a bidirectional interactive service communication system with an information hierarchical structure is established on the basis of service analysis according to a communication standard, the network structure is complete, and the problems that the power grid does not support bidirectional interactive services of users and the like can be solved.
Preferably, the data exchange is carried out inside the spacing layers, and the data exchange is directly carried out between the spacing layers; the interval layer exchanges and collects metering values with the process layer through the metering fusion module, and the interval layer respectively completes uploading and issuing of interactive data with the process layer and the station control layer through the data interaction module. Data communication is carried out between layers and inside layers of the communication network mechanism through communication standards, and a perfect bidirectional interactive communication network structure is established.
Preferably, the step S3 includes the following steps:
s31: searching a basic function module meeting online monitoring according to a function model logic node listed in a communication standard;
s32: according to the logic node extension specification of the communication standard, extending the logic nodes of the functional model which is not listed in the communication standard according to the communication specification;
s33: and establishing a bidirectional interactive service communication data model between the power grid and the user according to the logic nodes of the basic function model, the logic nodes of the extended function model and the data objects and according to the naming rules of the communication standard.
The scheme expands the logic nodes according to the requirements and has strong expansibility.
Preferably, the basic functional model mainly includes at least one physical logical node LPHD, one logical node zero LLN0 and one or more application specific logical nodes. And a perfect communication model is established, and the problem of insufficient support of the national network on the user bidirectional interactive service is solved.
Preferably, the extended function model comprises perfecting measurement and control/alarm logic node data, metering logic node data and protection logic node data on the basis of the logic nodes of the basic function model. The method is expanded according to the communication rule according to the actual requirement, and has wide application range and strong expansibility.
Preferably, the communication standard is IEC 61850. The IEC61850 standard has strong expansion capability.
The invention has the beneficial effects that:
1. modeling is carried out according to the IEC61850 communication standard, data expansion is carried out according to a template protocol, and the method has strong expansion capability.
2. And (3) building a network structure of the bidirectional interactive service communication system containing the information hierarchical structure, building a perfect data model, and solving the problem of insufficient support of the power grid on the bidirectional interactive service of the user.
3. The method has the advantages that the required data are regulated according to the communication standard, defined into different 'node data' according to different types, ordered and clear in data processing, the problems of multiple data acquisition modes, scattered positions, huge data volume, difficulty in information sharing and the like of diversified bidirectional interactive services can be solved, and the fusion capability of bidirectional interactive service data acquisition and interaction is promoted.
Drawings
FIG. 1 is a flow chart of a modeling method of the present invention.
Fig. 2 is a diagram of a bidirectional interactive service communication information network structure of the present invention.
FIG. 3 is a data and type structure diagram of the MMXU of the present invention.
Fig. 4 is a diagram showing the data and type structure of the GGIO according to the present invention.
FIG. 5 is a data and type structure diagram of the MMTR of the present invention.
Fig. 6 is a data and type structure diagram of the PTOC of the present invention.
In the figure, 1, a station control layer, 11, a platform host, 12, an operation platform, 2, a spacing layer, 21, an acquisition and metering fusion module, 22, a data interaction module, 3, a process layer, 31, a process interface, 32, a sensor, 33 and an actuator are arranged.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
in the modeling method for the two-way interactive service communication data between the power grid and the user according to the embodiment, taking the electric vehicle charging two-way interactive service as an example, as shown in fig. 1, the method includes the following steps:
and S1, analyzing the power service user requirement and the communication data requirement.
The electric vehicle charging bidirectional interactive service mainly comprises five submodules, namely electric energy metering charging, charging equipment state, asset management, event recording and charging control.
The electric energy charging module comprises parameters such as voltage, current, electric energy and electric charge; the charging equipment state module comprises parameters such as charging progress, temperature, humidity and connection state according to actual charging requirements; the asset management module mainly comprises asset statistics management of the charging equipment; the event recording module is used for reporting and recording events of the power utilization logs of the electric vehicle charging station; the charging control module includes charging status, protection control, and the like.
And S2, building a network structure of the bidirectional interactive service communication system containing the information hierarchical structure.
And abstracting the charging two-way interaction service of the electric automobile into an IEC61850 model. On the basis of electric power service analysis, a data model containing an information hierarchical structure is built according to the IEC61850 standard. As shown in fig. 2, the bidirectional interactive service communication system is divided into three layers, i.e., a station control layer 1, a spacer layer 2, and a process layer 3, in terms of logical concept and physical concept. The IEC61850 standard defines the communication interfaces between the layers.
The station control layer 1 comprises a platform host 11, an operation platform 12 and the like, and forms a monitoring management center of the interactive system. The station control layer 1 realizes management control of the devices of the bay layer 2 and is in communication connection with service support platforms such as a dispatching center or a disease control center and the like through a power data network.
The bay level 2 comprises a terminal acquisition metering fusion module 21 and a data interaction module 22. The device of the spacer layer 2 collects the real-time data information of the spacer layer 2, transmits the real-time data information to the station control layer 1 through the network, and simultaneously receives a control operation command sent by the station control layer 1, thereby realizing the transmission function of the operation command.
Data exchange is carried out between the inside of the spacing layer 2 and the spacing layer 2 in real time, the spacing layer 2 exchanges and collects metering values with the process layer 3 through the metering fusion module 21, and the spacing layer 2 respectively uploads and issues interactive data with the process layer 3 and the station control layer 1 through the data interaction module 2. The spacer layer 2 exchanges communication data with a remote control.
The process layer 3 includes various service terminal data acquisition devices including a process interface 31, a sensor 32 and an actuator 33. The process layer 3 mainly completes the related functions of analog quantity acquisition, switching value input/output, operation control command transmission and the like.
S3: and constructing a data model and expanding the data model according to the communication standard.
The communication standard adopted in the embodiment is an IEC61850 standard, the core of the IEC61850 standard is an information model and a modeling method, the IEC61850 standard abstracts actual physical equipment, and communication between the equipment is changed into information circulation between information models.
S31: and searching a basic function module meeting the online monitoring according to the function model logic nodes listed in the communication standard. The basic functional model mainly comprises at least one physical logical node LPHD, one logical node zero LLN0 and one or more application specific logical nodes.
S32: according to the logical node extension specification of the communication standard, logical nodes are extended according to the communication specification for functional models not listed in the communication standard. The extended function model includes perfecting measurement and control/alarm logic node data, metering logic node data and protection logic node data on the basis of the logic nodes of the basic function model.
S33: and establishing a bidirectional interactive service communication data model between the power grid and the user according to the logic nodes of the basic function model, the logic nodes of the extended function model and the data objects and according to the naming rules of the communication standard.
The monitoring function of the charging station is logically divided into three LD modules, including LD1, LD2, and LD 3. LD1 completes measurement, control and alarm functions; LD2 performs metering functions; LD3 performs a protection function. Each LD module contains a physical logical node LPHD and a logical node zero LLN 0. LPHD represents common information of physical devices; the LLN0 represents common information for logical devices.
LD1 contains measurement MMUX and general Process I/O GGIO logical nodes. The MMXU realizes the function of measurement and monitoring and monitors the alternating current and voltage of the charging station; the GGIO realizes the functions of state monitoring, alarming and control.
LD2 contains a metering MMTR logic node. The MMTR realizes electric energy metering.
LD3 includes time-limited overcurrent PTOC and time-limited overvoltage PTOV logic nodes that implement overcurrent and overvoltage protection for the charging station, respectively.
The MMTR obtains the output electric energy by obtaining the effective values of the current and the voltage collected by the logic node of the MMXU and calculating. PTOC and PTOV obtain the current and voltage value of MMXU, judge according to the protection action set value, when appearing overflowing, overvoltage, control the charging station through GGIO and stop charging.
The measured MMXU data composition and associated types are shown in fig. 3. The MMXU contains data Phv and a, Phv describes the output phase voltage of the ac charging station; a describes the output phase current.
The attribute types of PhV and A are three-phase system relative correlation measurement values WYE, wherein WYE comprises phsA, phsB and phsC with the attribute types of complex measurement values CMV. It is further determined that the CMV comprises data attributes comprising a measurement value cVal, a quality attribute q and a time stamp t. In addition, each logical node also contains descriptive data that inherits patterns, performance, health, and nameplates from a common logical node class.
The GGIO defined in the IEC61850 standard contains an integer state input IntIn for describing state information, data Alm for describing alarm, and a double-point controllable state output DPCSO for describing control. And expanding the data of the GGIO to describe the state, the alarm and the control information of the charging pile.
As shown in fig. 4, extended definitions of IntIn1, IntIn2, and IntIn3 in the GGIO respectively describe the charging state of the charging pile, the charging state of the terminal, and the door switch state information. The attribute type is an integer state INS, and the data attribute stVal thereof specifically represents various corresponding state values.
And data of alarm information and control information are expanded. The attribute type of the alarm data Alm is a single-point state public data type SPS, and the maintenance door opening alarm, the closing alarm, the charging starting alarm, the charging ending alarm and the device fault alarm information are specifically represented by using a data attribute stVal.
The control data DPCSO attribute type is DPC, and supports either conventional secure pre-operation selection control or conventional secure direct control. The control operation is completed through the coordination of data attributes such as a control mode ctlModel, an SBO class sboclass, a timeout time sbotteout and the like. The charging pile is controlled before starting charging and finishing charging by using conventional safe operation, and the charging pile is controlled by using conventional safe direct control in an emergency stop mode.
The metering MMTR in the metering logic node data contains the data net active power TotWh. The data attribute actVal of TotWh describes the output electric energy of the charging pile. The data composition and associated type of MMTR is shown in fig. 5.
The data of the protection function logical nodes PTOV and PTOC include a start Str, an action Op, a start value StrVal and a protection action time rltmms (relative time).
The attribute type of Str is ACD, and the data attribute comprises total action and three-phase protection setting; the attribute type of Op is ACT, and the data attribute comprises a total action and a three-phase protection action; StrVal is the action Start value; rltmms describes the action delay time; the data composition and associated type of PTOC is shown in fig. 6.
The method is not limited to the electric power system service of electric vehicle service bidirectional interaction, and other related or emerging electric power system service users have similar technical effects of interacting with the power grid.
Claims (8)
1. A modeling method for bidirectional interactive service communication data of a power grid and a user is characterized by comprising the following steps:
s1, analyzing the power service user demand and the communication data demand;
s2: based on the analyzed requirements, a network structure of the bidirectional interactive service communication system containing an information hierarchical structure is established according to the communication standard;
s3: and constructing a data model and expanding the data model according to the communication standard.
2. The modeling method of service communication data for power grid and user interaction in two directions of claim 1, wherein the power service user requirements include functional requirements of large customer service, residential user service, mobile operation service, electric vehicle service, and distributed power generation/energy storage service.
3. The modeling method for the service communication data of the power grid and the user in a two-way interaction manner according to claim 1 or 2, characterized in that the network structure of the communication system comprises a station control layer (1), a spacing layer (2) and a process layer (3);
the process layer (3) comprises a plurality of terminal data acquisition devices, and finishes acquisition of analog quantity, input/output of switching value and transmission of operation control commands;
the interlayer (2) comprises a terminal acquisition metering fusion module (21) and a data interaction module (22);
the station control layer (1) comprises a monitoring management center, the station control layer (1) completes management control on the equipment of the bay layer (2), and the station control layer () is in communication connection with the service support platform through a power data network.
4. A modeling method of power grid and user bidirectional interactive service communication data according to claim 3, characterized in that data exchange is performed inside the bay level (2), and data exchange is performed directly between the bay levels (2); the interval layer (2) exchanges and acquires a metering value with the process layer (3) through the metering fusion module (21), and the interval layer (2) respectively uploads and issues interactive data with the process layer (3) and the station control layer (1) through the data interaction module (22).
5. The modeling method for bi-directional interactive service communication data between power grid and user as claimed in claim 1, wherein said step S3 comprises the steps of:
s31: searching a basic function module meeting online monitoring according to a function model logic node listed in a communication standard;
s32: according to the logic node extension specification of the communication standard, extending the logic nodes of the functional model which is not listed in the communication standard according to the communication specification;
s33: and establishing a bidirectional interactive service communication data model between the power grid and the user according to the logic nodes of the basic function model, the logic nodes of the extended function model and the data objects and according to the naming rules of the communication standard.
6. The modeling method of two-way interactive service communication data between power grid and user as claimed in claim 5, wherein said basic functional model mainly comprises at least one physical logic node LPHD, one logic node zero LLN0 and one or more application specific logic nodes.
7. The modeling method for the service communication data between the power grid and the user in a two-way interaction manner according to claim 5 or 6, wherein the extended function model comprises perfecting measurement and control/alarm logic node data, metering logic node data and protection logic node data on the basis of logic nodes of a basic function model.
8. The modeling method for service communication data of power grid and user interaction in two directions according to claim 1 or 5, wherein the communication standard is IEC 61850.
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Application publication date: 20201113 |