CN111030304B - Electric power security protection intelligence thing networking systems - Google Patents

Electric power security protection intelligence thing networking systems Download PDF

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Publication number
CN111030304B
CN111030304B CN201911396484.5A CN201911396484A CN111030304B CN 111030304 B CN111030304 B CN 111030304B CN 201911396484 A CN201911396484 A CN 201911396484A CN 111030304 B CN111030304 B CN 111030304B
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intelligent
voltage
data
power distribution
power
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CN111030304A (en
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林祥华
王永勤
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Zhuhai Kaiwan Smart Technology Co ltd
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Zhuhai Kaiwan Smart Technology Co ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/12Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/7853
    • Y02E60/7869
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/128Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol

Abstract

The invention discloses an electric power security protection intelligent internet of things system, which belongs to the field of electric power and comprises a system physical layer which is a tree-shaped branched power supply network, wherein intelligent switch equipment with an edge calculation function is arranged at the tail end of a low-voltage branch of the tree-shaped branched power supply network; the sensing nodes of the intelligent switch device for collecting data form a near field communication network; data are interacted between each intelligent device of the intelligent switch device and the total power distribution system and the electric power security intelligent Internet of things platform; the electric power security protection intelligent Internet of things platform comprises a data access layer, an application layer and an analysis layer, wherein the data access layer is used for accessing various data and displaying data of one or more modules of the application layer based on a GIS technology. The distribution network operation diagram accurately corresponds to the actual geographic position, and the specific positions and various operation data of the distribution equipment scattered in all corners of a city are quickly and accurately searched and provided; the intelligent switch device has an edge calculation function, and response efficiency is improved.

Description

Electric power security protection intelligence thing networking systems
Technical Field
The invention relates to the field of electric power, in particular to an electric power security protection intelligent internet of things system.
Background
The national grid company points out that three types and two networks need to be created, the construction of a ubiquitous power internet of things is accelerated, the research and development application of a novel intelligent terminal based on a national grid core is promoted, and a power distribution internet of things demonstration area with an intelligent distribution transformer terminal as a core is explored and constructed. Meanwhile, modern information technologies such as mobile interconnection, artificial intelligence and the like and advanced communication technologies are fully applied, all things interconnection and man-machine interaction of all links of the power system are achieved, and a ubiquitous power internet of things with comprehensive sensing of states, efficient information processing and convenient and flexible application is created.
Therefore, advanced internet of things technologies such as 'cloud big thing moving intelligence' and the like are urgently needed to be applied deeply, the construction, operation and maintenance and management levels of the power distribution network are essentially improved, the cross-over development is realized, and the requirement of ubiquitous power internet of things construction is met. The low-voltage distribution internet of things is an important component of the ubiquitous power internet of things, is a novel power network form generated by deep fusion of the traditional industrial technology and the internet of things technology, realizes comprehensive perception, data fusion and intelligent application of a low-voltage distribution network through comprehensive interconnection, intercommunication and interoperation between low-voltage distribution network equipment, meets the demand of lean management of the distribution network, supports the quick construction of the ubiquitous power internet of things and a strong intelligent power grid, and is a distribution network in a new generation power system. The low-voltage power distribution internet of things solution based on the internet of things technical architecture can perfectly solve a plurality of problems currently faced by a low-voltage power distribution station area.
The existing low-voltage power distribution internet of things only realizes data acquisition and cloud centralized data processing, data and positions are linked, and the response efficiency of a power grid can be reduced by centralized data management.
Disclosure of Invention
The invention provides an electric power security protection intelligent Internet of things system, which solves the problems that in the prior art, a low-voltage power distribution Internet of things only realizes data acquisition and cloud centralized data processing, data and positions are linked, and the response efficiency of a power grid is reduced due to centralized data management.
The technical scheme of the invention is realized as follows:
the utility model provides an electric power security protection intelligence thing networking system, includes:
the system physical layer comprises a plurality of parallel main power distribution systems connected with a high-voltage main line, wherein each main power distribution system comprises a plurality of low-voltage main lines and a plurality of low-voltage branches connected with the low-voltage main lines; the system physical layer is a tree-shaped branched power supply network, and intelligent switch equipment with an edge calculation function is arranged at the tail end of a low-voltage branch of the tree-shaped branched power supply network;
the intelligent switch equipment and each sensing node for collecting data on the low-voltage branch form a near-distance and local communication network in a low-voltage power line carrier communication mode or a micropower wireless communication mode or a Lora wireless communication mode;
the remote communication network is used for enabling the intelligent switch equipment serving as the edge node and each intelligent equipment of the total transformer power distribution system to interact data with the electric power security intelligent Internet of things platform in a wired or wireless remote communication mode;
the electric power security protection intelligent Internet of things platform comprises a data access layer, an application layer and an analysis layer, wherein the data access layer is used for accessing various data, and the application layer comprises a lean line loss analysis module, a transformer monitoring module, a transformer state detection and evaluation module, a user power failure intelligent study and judgment module, an intelligent ammeter interaction module, a distributed energy monitoring module and an electric energy quality monitoring module; the analysis layer comprises distribution station area load prediction analysis, network topology analysis, low-voltage distribution network dynamic analysis, low-voltage distribution line impedance analysis and electric energy quality comprehensive analysis, and one or more modules of the application layer are subjected to data display based on a GIS technology.
As a preferred embodiment of the present invention, the intelligent switch device is further configured to set an alarm threshold and an action threshold corresponding to each parameter, and determine whether the alarm threshold and the action threshold are reached according to each parameter fed back by the sensing node, and if yes, send an alarm or execute a corresponding action.
In a preferred embodiment of the present invention, the telecommunication network includes an optical fiber communication mode, an industrial ethernet communication mode, a medium voltage power line carrier communication mode, a 4G/5G wireless communication mode, a power-dedicated low-power consumption communication mode, a large customer-specific wireless public network communication mode, and a satellite communication mode.
As a preferred embodiment of the invention, the data access layer is used for accessing traffic data, network-aware data and management data.
As a preferred embodiment of the present invention, the total power distribution system includes a total power distribution cabinet connected to a high-voltage main line, the total power distribution cabinet is connected to a plurality of main line power distribution cabinets through a low-voltage main line, the main line power distribution cabinet is connected to a plurality of branch line power distribution cabinets through a low-voltage branch line, and the branch line power distribution cabinet is connected to a plurality of user-side smart electrical boxes.
As a preferred embodiment of the present invention, the lean line loss analysis module calculates branch hierarchical line loss of the total power distribution system by using a graph theory calculation method based on a physical topology identification, an accurate metering and an accurate time synchronization technology of the total power distribution system, based on the total power distribution cabinet, the main line power distribution cabinet, the branch line power distribution cabinet and the smart power box of the user side, and estimates the conditions of electricity stealing and new user increase of the low-voltage power distribution network by combining historical data of line loss of each section.
As a preferred embodiment of the present invention, the power quality monitoring module collects data of the reactive power compensation device, the device source side current, the load side current, the terminal voltage, and the device operation state in real time through the intelligent switching device of the edge node and each intelligent device of the total power distribution system, and predicts the power quality situation according to a situation awareness algorithm to form a control decision.
The invention has the beneficial effects that: accurately corresponding the distribution network operation diagram to the actual geographic position, and quickly and accurately searching and providing specific positions and various operation data of distribution equipment scattered in all corners of a city; the intelligent switch device has an edge calculation function, and response efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic block diagram of an embodiment of an electric security intelligent Internet of things system of the present invention;
FIG. 2 is a schematic block diagram of an electric security intelligent Internet of things platform;
FIG. 3 is a schematic circuit diagram of a first central processing unit and a second central processing unit of the intelligent switching device;
FIG. 4 is a circuit schematic of a metering circuit of the intelligent switching device;
FIG. 5 is a circuit schematic of an execution unit of the intelligent switching device;
FIG. 6 is one of the circuit schematic diagrams of the data acquisition unit of the intelligent switching device;
FIG. 7 is a second schematic circuit diagram of a data acquisition unit of the intelligent switching device;
fig. 8 is a circuit schematic of a power circuit of the intelligent switching device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 8, the present invention provides an electric security intelligent internet of things system, including:
the system physical layer comprises a plurality of parallel main transformer distribution systems connected with a high-voltage main line, and each main transformer distribution system comprises a plurality of low-voltage main lines and a plurality of low-voltage branches connected with the low-voltage main lines; the system physical layer is a tree-shaped branched power supply network, and intelligent switch equipment with an edge calculation function is arranged at the tail end of a low-voltage branch of the tree-shaped branched power supply network;
the intelligent switch equipment and each sensing node for collecting data on the low-voltage branch form a near-distance and local communication network in a low-voltage power line carrier communication mode or a micropower wireless communication mode or a Lora wireless communication mode;
the remote communication network is used for enabling the intelligent switch equipment serving as the edge node and each intelligent equipment of the total transformer power distribution system to interact data with the electric power security intelligent Internet of things platform in a wired or wireless remote communication mode;
the electric power security protection intelligent Internet of things platform comprises a data access layer, an application layer and an analysis layer, wherein the data access layer is used for accessing various data, and the application layer comprises a lean line loss analysis module, a transformer monitoring module, a transformer state detection and evaluation module, a user power failure intelligent study and judgment module, an intelligent ammeter interaction module, a distributed energy monitoring module and an electric energy quality monitoring module; the analysis layer comprises distribution station area load prediction analysis, network topology analysis, low-voltage distribution network dynamic analysis, low-voltage distribution line impedance analysis and electric energy quality comprehensive analysis, and one or more modules of the application layer are subjected to data display based on a GIS technology.
The intelligent switch equipment is also used for setting alarm thresholds and action thresholds corresponding to the parameters, judging whether the alarm thresholds and the action thresholds are reached according to the parameters fed back by the sensing nodes, and if so, giving an alarm or executing corresponding actions. The sensing node collects working voltage, working current, leakage current, electric quantity metering, switch temperature and ignition; setting an over-voltage and under-voltage alarm threshold value and an over-voltage and under-voltage action threshold value (a switch body threshold value is set in a default state) for the intelligent switch equipment; setting an overcurrent alarm threshold and an overcurrent action threshold (a switch body threshold is set in default); setting an electric quantity abnormal alarm threshold, setting a switch temperature alarm threshold and setting a switch temperature action threshold; setting a switch ignition alarm threshold value and setting a switch ignition action threshold value; setting a switch leakage current alarm threshold value and setting a switch leakage current operation method value.
The intelligent switch device realizes the functions of edge calculation, local processing and data uploading to a communication management module, and comprises a voltage sampling resistor, a current sampling sensor, a leakage current sensor and a temperature measuring sensor; the monitoring module of the switch body mainly comprises 2 central processing units and 1 metering chip; the device comprises 1 opening and closing micromotors, 1 tripping micromotor (the shortest tripping time is 15ms), 1 manual/automatic change-over switch and 1 indicator light; internal or external DC12V operating power supply. The intelligent switch device adopts RS485 to lower (switch body), and is used for exchanging data with a superior monitoring platform, and the intelligent switch device comprises the following transmission modes: TCP/IP, RS485, NB-IoT, 4G (all-network), HPLC, Zigbee, LRAWAN (Ad hoc network).
The remote communication network comprises an optical fiber communication mode, an industrial Ethernet communication mode, a medium-voltage power line carrier communication mode, a 4G/5G wireless communication mode, a power-dedicated low-power-consumption communication mode, a large-customer-dedicated wireless public network communication mode and a satellite communication mode.
The data access layer is used for accessing service data, network perception data and management data.
The total power distribution system comprises a total power distribution cabinet connected with a high-voltage trunk line, the total power distribution cabinet is connected with a plurality of main line power distribution cabinets through a low-voltage trunk line, the main line power distribution cabinets are connected with a plurality of branch line power distribution cabinets through low-voltage branch lines, and the branch line power distribution cabinets are connected with a plurality of user side intelligent power boxes.
The lean line loss analysis module is based on physical topology recognition, accurate metering and accurate time synchronization technologies of a total power distribution system, calculates branch grading line loss of the total power distribution system by adopting a graph theory calculation method based on a total power distribution cabinet, a main line power distribution cabinet, a branch line power distribution cabinet and a user side intelligent power box, and estimates the conditions of electricity stealing and new user addition of the low-voltage power distribution network by combining historical data of line loss of each section.
The electric energy quality monitoring module collects the reactive power compensation device, the current at the source side of the device, the current at the load side, the terminal voltage and the device running state data in real time through the intelligent switch device of the edge node and each intelligent device of the total power distribution system, predicts the electric energy quality condition according to a situation perception algorithm and forms a control decision. The electric energy quality monitoring module can also monitor orderly charging of the charging pile, monitor data information of multiple data networks such as power grid load, user behavior data and charging equipment operation data in a regional power grid, and provide an optimal charging strategy.
The intelligent power failure research and judgment module for the user is based on a distribution room topological graph and is used for collecting transformer, total protection, leakage protection and branch switch information in real time, and the intelligent distribution transformer terminal can be used for rapidly analyzing fault types, fault positions and reasons possibly causing faults and reporting to a platform by combining user ammeter data.
The distributed energy monitoring module is used for monitoring the condition of photovoltaic power generation capacity, monitoring the quality of electric energy output by a photovoltaic inverter, voltage, harmonic waves and the like, monitoring an electric power island, ensuring maintenance safety, generating various alarm events and reporting to a master station system, and forcibly isolating a grid-connected line for users seriously influencing the quality of a power grid through an alternating current contactor.
The invention monitors the running state of the equipment in real time; remote control operation is carried out on the switch, so that field work is reduced, and the working efficiency is improved; accident alarming and recording, report statistics and printing are realized, and system analysis application is provided; the maintenance and accident emergency repair are convenient; the distribution network operation diagram accurately corresponds to the actual geographic position, so that the specific positions and various operation data of the distribution equipment scattered in each corner of a city are quickly and accurately searched and provided, and the complicated work of on-site inspection, operation and the like is greatly reduced; intelligently analyzing and deciding; the system reduces the working intensity of statistics, recording, searching, analysis and the like, can quickly finish daily work such as business reports, power supply schemes and the like, greatly improves the working efficiency, realizes the people reduction and the efficiency improvement of power supply enterprises, improves the production efficiency of the power supply enterprises and improves the lean management level.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The utility model provides an electric power security protection intelligence thing networking systems which characterized in that: comprises that
The system physical layer comprises a plurality of parallel main power distribution systems connected with a high-voltage main line, wherein each main power distribution system comprises a plurality of low-voltage main lines and a plurality of low-voltage branches connected with the low-voltage main lines; the system physical layer is a tree-shaped branched power supply network, and intelligent switch equipment with an edge calculation function is arranged at the tail end of a low-voltage branch of the tree-shaped branched power supply network;
the intelligent switch equipment and each sensing node for collecting data on the low-voltage branch form a near-distance and local communication network in a low-voltage power line carrier communication mode or a micropower wireless communication mode or a Lora wireless communication mode;
the remote communication network is used for enabling the intelligent switch equipment serving as the edge node and each intelligent equipment of the total transformer power distribution system to interact data with the electric power security intelligent Internet of things platform in a wired or wireless remote communication mode;
the electric power security protection intelligent Internet of things platform comprises a data access layer, an application layer and an analysis layer, wherein the data access layer is used for accessing various data, and the application layer comprises a lean line loss analysis module, a transformer monitoring module, a transformer state detection and evaluation module, a user power failure intelligent study and judgment module, an intelligent ammeter interaction module, a distributed energy monitoring module and an electric energy quality monitoring module; the analysis layer comprises distribution station area load prediction analysis, network topology analysis, low-voltage distribution network dynamic analysis, low-voltage distribution line impedance analysis and electric energy quality comprehensive analysis, and one or more modules of the application layer are subjected to data display based on a GIS technology.
2. The electric power security intelligent internet of things system according to claim 1, characterized in that: the intelligent switch equipment is also used for setting alarm thresholds and action thresholds corresponding to the parameters, judging whether the alarm thresholds and the action thresholds are reached according to the parameters fed back by the sensing node, and if so, giving an alarm or executing corresponding actions.
3. The electric power security intelligent internet of things system according to claim 1, characterized in that: the remote communication network comprises an optical fiber communication mode, an industrial Ethernet communication mode, a medium-voltage power line carrier communication mode, a 4G/5G wireless communication mode, an electric power special low-power-consumption communication mode, a large customer private line wireless public network communication mode and a satellite communication mode.
4. The electric power security intelligent internet of things system according to claim 1, characterized in that: the data access layer is used for accessing service data, network perception data and management data.
5. The electric power security intelligent internet of things system according to claim 1, characterized in that: the total power distribution system comprises a total power distribution cabinet connected with a high-voltage trunk line, the total power distribution cabinet is connected with a plurality of main line power distribution cabinets through a low-voltage trunk line, the main line power distribution cabinets are connected with a plurality of branch line power distribution cabinets through low-voltage branch lines, and the branch line power distribution cabinets are connected with a plurality of user side intelligent power boxes.
6. The electric power security intelligent internet of things system according to claim 5, wherein: the lean line loss analysis module is based on physical topology recognition, accurate metering and accurate time synchronization technologies of a total power distribution system, calculates branch grading line loss of the total power distribution system by adopting a graph theory calculation method based on a total power distribution cabinet, a main line power distribution cabinet, a branch line power distribution cabinet and a user side intelligent power box, and estimates the conditions of electricity stealing and new user addition of the low-voltage power distribution network by combining historical data of line loss of each section.
7. The electric power security intelligent internet of things system according to claim 1, characterized in that: the electric energy quality monitoring module collects the reactive power compensation device, the current at the source side of the device, the current at the load side, the terminal voltage and the device running state data in real time through the intelligent switch device of the edge node and each intelligent device of the total power distribution system, predicts the electric energy quality condition according to a situation perception algorithm and forms a control decision.
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CN112490932A (en) * 2020-12-10 2021-03-12 国网河南省电力公司漯河供电公司 Intelligent identification system for regional power grid maintenance plan

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