CN113991875A - Low-voltage distribution network terminal equipment and message interaction method thereof - Google Patents
Low-voltage distribution network terminal equipment and message interaction method thereof Download PDFInfo
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- CN113991875A CN113991875A CN202111607191.4A CN202111607191A CN113991875A CN 113991875 A CN113991875 A CN 113991875A CN 202111607191 A CN202111607191 A CN 202111607191A CN 113991875 A CN113991875 A CN 113991875A
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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
- H02J13/00007—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 using the power network as support for the transmission
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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
- H02J13/00022—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 using wireless data transmission
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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
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2213/00—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network
- H02J2213/10—Indexing scheme relating to details of circuit arrangements for providing remote indication of network conditions of for circuit arrangements for providing remote control of switching means in a power distribution network using simultaneously two or more different transmission means
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S40/00—Systems 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
- Y04S40/12—Systems 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
- Y04S40/121—Systems 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 the power network as support for the transmission
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S40/00—Systems 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
- Y04S40/12—Systems 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
- Y04S40/126—Systems 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
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S40/00—Systems 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
- Y04S40/12—Systems 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
- Y04S40/128—Systems 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 provides a low-voltage distribution network terminal device and a message interaction method thereof, belonging to the technical field of power consumer electricity consumption information acquisition systems, and comprising a terminal device at a power consumer side, a side device at a station transformer side and a cloud master station; the end equipment at the power consumer side is in communication connection with the side equipment at the transformer side through a low-voltage power line high-speed carrier communication channel; and the side equipment at the station change side is connected with the cloud master station by using an MQTT communication protocol. The invention solves the problems that in the implementation process, the communication network of the transformer area is taken as the private network of the transformer area terminal in various design schemes at present, the contact between a master station and the tail end service equipment of a power distribution network is blocked, the cloud end of the master station cannot directly perform data interaction with the tail end service equipment, the data of the tail end service equipment can only be read by the transformer area terminal, the instruction of the master station can only be forwarded by the transformer area terminal instead, and the transformer area terminal of the full-service agent becomes complicated.
Description
Technical Field
The invention belongs to the technical field of power consumption information acquisition systems for power consumers, and particularly relates to a low-voltage distribution network terminal device and a message interaction method thereof.
Background
The low-voltage distribution network is positioned at the tail end of the whole power grid, and has the characteristics of wide distribution, complex power supply and utilization environment, high operation and maintenance difficulty and the like.
In the implementation process, in various design schemes, a platform area communication network is used as a private network of a platform area terminal, the contact between a main station and a terminal service device of a power distribution network is blocked, the cloud end of the main station cannot directly interact with the terminal service device, the data of the terminal service device can only be copied and read by the platform area terminal, instructions of the main station can only be forwarded by the platform area terminal instead, and the platform area terminal of a full-service agent becomes complicated.
Disclosure of Invention
The invention provides a low-voltage distribution network terminal device and a message interaction method thereof, and aims to solve the problems that in the implementation process, in various design schemes, a platform area communication network is used as a private network of a platform area terminal, the connection between a main station and a distribution network terminal service device is blocked, the cloud end of the main station cannot directly interact data with the terminal service device, the data of the terminal service device can only be read by the platform area terminal, the instruction of the main station can only be forwarded by the platform area terminal instead, and the platform area terminal of a full-service agent becomes complicated.
The embodiment of the invention provides low-voltage distribution network terminal equipment, which comprises end equipment at a power consumer side, side equipment at a station transformer side and a cloud master station;
the end equipment at the power consumer side is in communication connection with the side equipment at the transformer side through a low-voltage power line high-speed carrier communication channel;
and the side equipment at the station change side is connected with the cloud master station by using an MQTT communication protocol.
Further, the end equipment at the power consumer side comprises an electric meter and an ordered power utilization charging pile;
an HPLC carrier wave sub-node module is embedded in the electricity meter and the ordered electricity utilization charging pile and is used for realizing the conversion between the MQTT and DL/T645 multifunctional electric energy meter communication protocol and the DL/T698.45 object-oriented data exchange protocol, so that the electricity meter and the ordered electricity utilization charging pile end equipment become sub-nodes supporting the MQTT communication protocol;
the MQTT communication protocol comprises an MQTT client and an MQTT proxy server, wherein the MQTT client is used for publishing information which may be subscribed by other clients, subscribing messages published by other clients, unsubscribing or deleting messages of application programs and disconnecting the connection with the MQTT proxy server; the MQTT proxy server is used for receiving network connection from the MQTT client, receiving application information published by the MQTT client, processing subscription and unsubscription requests from the MQTT client and forwarding application program messages to the subscribed MQTT client;
the HPLC carrier sub-node module is accessed to the district HPLC network through the low-voltage power carrier;
an application layer in the low-voltage power carrier logs in an MQTT proxy server side of the energy Internet of things gateway of the transformer area by an MQTT client, and the MQTT proxy server side is used for subscribing electric meter data, events and reporting period parameters which are reported periodically;
the HPLC carrier wave sub-node module is also used for organizing subscribed electric meter data, events and reporting period parameters which are reported regularly into DL/T645 or DL/T698.45 messages, converting the collected electric meter data into corresponding theme contents of an MQTT communication protocol, and then issuing the corresponding theme contents to the station area energy Internet of things gateway by using the MQTT communication protocol through a low-voltage power line high-speed carrier wave communication channel.
Further, the side equipment on the transformer substation side comprises a transformer area energy internet of things gateway, uplink communication of the transformer area energy internet of things gateway is in communication connection with an internet of things management platform in a cloud master station through a 4G wireless communication channel, downlink communication of the transformer area energy internet of things gateway is in communication connection with end equipment on the electric power user side through a low-voltage power line high-speed carrier communication channel, and the uplink channel and the downlink channel of the transformer area energy internet of things gateway both adopt an MQTT communication protocol;
the energy Internet of things gateway of the transformer area is internally provided with an MQTT Broker which serves as an MQTT proxy server end and further receives the messages subscribed and issued by the side equipment at the transformer side; the MQTT Broker is also used as an MQTT client to realize the subscription to the side equipment.
Furthermore, the cloud master station comprises a master station application and an internet of things management platform, wherein an MQTT Broker is also arranged in the internet of things management platform, and the MQTT Broker is used as an MQTT proxy server end and further receives the subscription and the publishing of messages to the MQTT Broker by the side equipment on the station transformer side; the MQTT Broker is also used as an MQTT client to realize subscription initiation to the side equipment, the IOT management platform is in communication connection with the side equipment on the transformer side through an MQTT communication protocol, and the IOT management platform in the cloud master station is also in communication connection with the field equipment.
Further, information exchange between the cloud master station and the end equipment on the power consumer side and the side equipment on the station transformer side is carried out in a publishing and subscribing manner, and the subscribing and publishing are based on a theme;
the main topic is: the/Topic version/edge device or end device ID/message performs a category/message action,/{ v1}/{ DevId }/{ Topic Type }/{ Topic Command }, where:
{ v1}, indicating the currently defined subject version as v1, v2 or v3 version;
{ DevId }, which indicates an edge device or end device ID, which is unique inside the system;
{ Topic Type }: the types of Topic mainly include device, app, service and management; the device represents that the topic is a device type message, the service represents a service type message, the app represents an application type message, and the management represents a container management message;
and { topoic Command }, wherein the actions of the message such as data recall request or response and start-stop control of the orderly power utilization charging pile are represented.
Furthermore, the MQTT communication protocol runs through the whole communication network, the MQTT communication protocol completes information interaction by using a publishing and subscribing mechanism, one-to-many information publishing is realized, all service nodes are equal in whole network, interconnected and non-hierarchical, and finally all service equipment at the tail end of the low-voltage distribution network is visible in the whole network.
A method for message interaction at the tail end of a low-voltage distribution network comprises the following steps:
s1: the low-voltage power line high-speed carrier communication channel is transmitted by adopting an MQTT communication protocol, a field ammeter and an ordered electricity utilization charging pile are not changed, an HPLC carrier sub-node module is embedded in the ammeter and the ordered electricity utilization charging pile, the ordered electricity utilization charging pile displays three-phase voltage and current, daily electricity quantity, state, invitation and participation times in the month, and the conversion of the MQTT and DL/T645 multifunctional electric energy meter communication protocol and the DL/T698.45 object-oriented data exchange protocol is realized in the HPLC carrier sub-node module, so that the ammeter and the ordered electricity utilization charging pile end equipment become sub-nodes supporting the MQTT communication protocol;
s2: after the HPLC carrier sub-node module is accessed to a district HPLC network in a low-voltage power line carrier mode, an MQTT client logs in an MQTT proxy service end of a district energy Internet of things gateway at a power line carrier application layer, and electric meter data, events and reporting period parameters which are reported periodically are subscribed through the MQTT proxy service;
s3: the HPLC carrier wave sub-node module organizes DL/T645 or DL/T698.45 messages according to the parameters, converts the collected electric meter data into corresponding subject content of an MQTT communication protocol, and then issues the corresponding subject content to the district energy Internet of things gateway by utilizing the MQTT communication protocol through an HPLC channel;
s4: the method comprises the steps that a 4G wireless communication channel is used for the on-line communication of a platform area energy Internet of things gateway to be connected with an Internet of things management platform, the on-line communication of the platform area energy Internet of things gateway is communicated with end equipment in a low-voltage power line high-speed carrier communication mode, an MQTT Broker is arranged in the platform area energy Internet of things gateway, and MQTT communication protocols are adopted in an uplink channel and a downlink channel;
s5: the method comprises the following steps that information interaction is carried out between an internet of things management platform in a cloud master station and side equipment on a station transformer side through an MQTT communication protocol, and the cloud master station is communicated with field equipment through the internet of things management platform;
s6: the information interaction between the cloud master station and the side equipment and the end equipment is carried out in a publishing and subscribing mode, the subscribing and the publishing are based on topics, the whole communication network is penetrated through by MQTT, the information interaction is completed by utilizing a publishing and subscribing mechanism, one-to-many information distribution is realized, all service nodes are equal in network, interconnected and non-hierarchical, and finally all the low-voltage distribution network terminal service equipment is visible in the whole network.
The invention has the beneficial effects that:
the invention can realize the message communication mechanism of publishing and subscribing in the power line carrier communication, can publish one message only once, can be received by a plurality of consumption terminals, application programs or equipment, can realize the two-way communication between the equipment and the equipment, and can realize one-to-many message distribution by applying the method, all service nodes are equal in whole network, interconnected and have no hierarchy, all low-voltage distribution network terminal service equipment is visible in the whole network, the data fusion access and processing capacity of the low-voltage distribution network terminal equipment can be improved, and the terminal resource configuration and the intelligent interaction capacity of the energy network monitoring system of the transformer area are improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a platform energy network monitoring system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a process of an edge device issuing a subscription to a cloud master station according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a process of a cloud master station publishing a subscription to an edge device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of MQTT-HPLC proxy service according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a process of an end device publishing a subscription to an edge device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the technical solutions of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the specific embodiments of the present invention. Like reference symbols in the various drawings indicate like elements. It should be noted that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Referring to fig. 1 to 5, an embodiment of the present invention provides a low-voltage distribution network end device, including an end device on a power consumer side, an edge device on a station transformer side, and a cloud master station;
the end equipment at the power consumer side is in communication connection with the side equipment at the transformer side through a low-voltage power line high-speed carrier communication channel;
and the side equipment at the transformer station side is connected with the cloud master station by using an MQTT communication protocol.
The end equipment at the power consumer side comprises an ammeter and an ordered electricity utilization charging pile;
an HPLC carrier sub-node module is embedded in the electric meter and the ordered electric charging pile and is used for realizing the conversion between an MQTT and DL/T645 multifunctional electric energy meter communication protocol and a DL/T698.45 object-oriented data exchange protocol, so that the electric meter and the ordered electric charging pile end equipment become sub-nodes supporting the MQTT communication protocol;
the MQTT communication protocol comprises an MQTT client and an MQTT proxy server, wherein the MQTT client is used for publishing information which may be subscribed by other clients, subscribing messages published by other clients, unsubscribing or deleting messages of application programs and disconnecting the connection with the MQTT proxy server; the MQTT proxy server is used for receiving network connection from the MQTT client, receiving application information published by the MQTT client, processing subscription and unsubscription requests from the MQTT client and forwarding application program messages to the subscribed MQTT client;
the HPLC carrier sub-node module is accessed to the district HPLC network through the low-voltage power carrier;
an application layer in the low-voltage power carrier logs in an MQTT proxy server side of the energy Internet of things gateway of the transformer area by an MQTT client, and the MQTT proxy server side is used for subscribing electric meter data, events and reporting period parameters which are reported periodically;
the HPLC carrier wave sub-node module is also used for organizing subscribed electric meter data, events and reporting period parameters which are reported regularly into DL/T645 or DL/T698.45 messages, converting the collected electric meter data into corresponding theme contents of an MQTT communication protocol, and then issuing the corresponding theme contents to the station area energy Internet of things gateway by using the MQTT communication protocol through a low-voltage power line high-speed carrier wave communication channel.
The side equipment on the transformer substation side comprises a transformer area energy Internet of things gateway, uplink communication of the transformer area energy Internet of things gateway is in communication connection with an Internet of things management platform in a cloud master station through a 4G wireless communication channel, downlink communication of the transformer area energy Internet of things gateway is in communication connection with end equipment on the power user side through a low-voltage power line high-speed carrier communication channel, and the uplink channel and the downlink channel of the transformer area energy Internet of things gateway both adopt an MQTT communication protocol;
MQTT Broker is arranged in the station area energy Internet of things gateway and serves as an MQTT proxy server end, and then the side equipment on the station transformer side subscribes and publishes messages to the side equipment; the MQTT Broker is also used as an MQTT client to realize the subscription to the side equipment.
The cloud master station comprises a master station application and an Internet of things management platform, wherein an MQTT Broker is also arranged in the Internet of things management platform and serves as an MQTT proxy server terminal, and then the MQTT Broker receives messages subscribed and issued by the side equipment on the station change side; the MQTT Broker is also used as an MQTT client to realize subscription initiation to the side equipment, the IOT management platform is in communication connection with the side equipment on the transformer side through an MQTT communication protocol, and the IOT management platform in the cloud master station is also in communication connection with the field equipment.
Information exchange between the cloud master station and the end equipment on the power consumer side and the side equipment on the transformer side is carried out in a publishing and subscribing manner, and the subscribing and the publishing are based on a theme;
the main topic is: the/Topic version/edge device or end device ID/message performs a category/message action,/{ v1}/{ DevId }/{ Topic Type }/{ Topic Command }, where:
{ v1}, indicating the currently defined subject version as v1, v2 or v3 version;
{ DevId }, which indicates an edge device or end device ID, which is unique inside the system;
{ Topic Type }: the types of Topic mainly include device, app, service and management; the device represents that the topic is a device type message, the service represents a service type message, the app represents an application type message, and the management represents a container management message;
and { topoic Command }, wherein the actions of the message such as data recall request or response and start-stop control of the orderly power utilization charging pile are represented.
The MQTT communication protocol runs through the whole communication network, the MQTT communication protocol completes information interaction by using a publishing and subscribing mechanism, one-to-many information publishing is realized, all service nodes are equal in network, interconnected and non-hierarchical, and finally all terminal service equipment of the low-voltage distribution network is visible in the whole network.
A method for message interaction at the tail end of a low-voltage distribution network comprises the following steps:
s1: the low-voltage power line high-speed carrier communication channel is transmitted by adopting an MQTT communication protocol, a field ammeter and an ordered electricity utilization charging pile are not changed, an HPLC carrier sub-node module is embedded in the ammeter and the ordered electricity utilization charging pile, the ordered electricity utilization charging pile displays three-phase voltage and current, daily electricity quantity, state, invitation and participation times in the month, and the conversion of the MQTT and DL/T645 multifunctional electric energy meter communication protocol and the DL/T698.45 object-oriented data exchange protocol is realized in the HPLC carrier sub-node module, so that the ammeter and the ordered electricity utilization charging pile end equipment become sub-nodes supporting the MQTT communication protocol;
s2: after the HPLC carrier sub-node module is accessed to a district HPLC network in a low-voltage power line carrier mode, an MQTT client logs in an MQTT proxy service end of a district energy Internet of things gateway at a power line carrier application layer, and electric meter data, events and reporting period parameters which are reported periodically are subscribed through the MQTT proxy service;
s3: the HPLC carrier wave sub-node module organizes DL/T645 or DL/T698.45 messages according to the parameters, converts the collected electric meter data into corresponding subject content of an MQTT communication protocol, and then issues the corresponding subject content to the district energy Internet of things gateway by utilizing the MQTT communication protocol through an HPLC channel;
s4: the method comprises the steps that a 4G wireless communication channel is used for the on-line communication of a platform area energy Internet of things gateway to be connected with an Internet of things management platform, the on-line communication of the platform area energy Internet of things gateway is communicated with end equipment in a low-voltage power line high-speed carrier communication mode, an MQTT Broker is arranged in the platform area energy Internet of things gateway, and MQTT communication protocols are adopted in an uplink channel and a downlink channel;
s5: the method comprises the following steps that information interaction is carried out between an internet of things management platform in a cloud master station and side equipment on a station transformer side through an MQTT communication protocol, and the cloud master station is communicated with field equipment through the internet of things management platform;
s6: the information interaction between the cloud master station and the side equipment and the end equipment is carried out in a publishing and subscribing mode, the subscribing and the publishing are based on topics, the whole communication network is penetrated through by MQTT, the information interaction is completed by utilizing a publishing and subscribing mechanism, one-to-many information distribution is realized, all service nodes are equal in network, interconnected and non-hierarchical, and finally all the low-voltage distribution network terminal service equipment is visible in the whole network.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The low-voltage distribution network terminal equipment is characterized by comprising end equipment at a power consumer side, side equipment at a station transformer side and a cloud master station;
the end equipment at the power consumer side is in communication connection with the side equipment at the transformer side through a low-voltage power line high-speed carrier communication channel;
and the side equipment at the station change side is connected with the cloud master station by using an MQTT communication protocol.
2. A low voltage distribution network terminal device according to claim 1, characterized in that: the end equipment at the power consumer side comprises an ammeter and an ordered electricity utilization charging pile;
an HPLC carrier wave sub-node module is embedded in the electricity meter and the ordered electricity utilization charging pile and is used for realizing the conversion between the MQTT and DL/T645 multifunctional electric energy meter communication protocol and the DL/T698.45 object-oriented data exchange protocol, so that the electricity meter and the ordered electricity utilization charging pile end equipment become sub-nodes supporting the MQTT communication protocol;
the MQTT communication protocol comprises an MQTT client and an MQTT proxy server, wherein the MQTT client is used for publishing information which may be subscribed by other clients, subscribing messages published by other clients, unsubscribing or deleting messages of application programs and disconnecting the connection with the MQTT proxy server; the MQTT proxy server is used for receiving network connection from the MQTT client, receiving application information published by the MQTT client, processing subscription and unsubscription requests from the MQTT client and forwarding application program messages to the subscribed MQTT client;
the HPLC carrier sub-node module is accessed to the district HPLC network through the low-voltage power carrier;
an application layer in the low-voltage power carrier logs in an MQTT proxy server side of the energy Internet of things gateway of the transformer area by an MQTT client, and the MQTT proxy server side is used for subscribing electric meter data, events and reporting period parameters which are reported periodically;
the HPLC carrier wave sub-node module is also used for organizing subscribed electric meter data, events and reporting period parameters which are reported regularly into DL/T645 or DL/T698.45 messages, converting the collected electric meter data into corresponding theme contents of an MQTT communication protocol, and then distributing the corresponding theme contents to the station area energy Internet of things gateway by utilizing the MQTT communication protocol through an HPLC channel.
3. A low voltage distribution network terminal device according to claim 1, characterized in that: the side equipment on the transformer substation side comprises a transformer area energy Internet of things gateway, uplink communication of the transformer area energy Internet of things gateway is in communication connection with an Internet of things management platform in a cloud master station through a 4G wireless communication channel, downlink communication of the transformer area energy Internet of things gateway is in communication connection with end equipment on the electric power user side through a low-voltage power line high-speed carrier communication channel, and the uplink channel and the downlink channel of the transformer area energy Internet of things gateway both adopt MQTT communication protocols;
the energy Internet of things gateway of the transformer area is internally provided with an MQTT Broker which serves as an MQTT proxy server end and further receives the messages subscribed and issued by the side equipment at the transformer side; the MQTT Broker is also used as an MQTT client to realize the subscription to the side equipment.
4. A low voltage distribution network terminal device according to claim 1, characterized in that: the cloud master station comprises a master station application and an Internet of things management platform, wherein an MQTT Broker is also arranged in the Internet of things management platform, and the MQTT Broker is used as an MQTT proxy server end and further receives the subscription and the release of messages to the MQTT proxy server end by the side equipment on the station transformer side; the MQTT Broker is also used as an MQTT client to realize subscription initiation to the side equipment, the IOT management platform is in communication connection with the side equipment on the transformer side through an MQTT communication protocol, and the IOT management platform in the cloud master station is also in communication connection with the field equipment.
5. A low voltage distribution network terminal device according to claim 1, characterized in that: and the information exchange between the cloud master station and the end equipment at the power user side and the side equipment at the station transformer side is carried out by adopting a publishing and subscribing mode, and the subscribing and the publishing are based on topics.
6. A low voltage distribution network terminal device according to claim 1, characterized in that: the MQTT communication protocol, which utilizes a publish and subscribe mechanism to complete information interaction, extends throughout the communication network.
7. A method for message interaction at the tail end of a low-voltage distribution network is characterized by comprising the following steps:
s1: the low-voltage power line high-speed carrier communication channel is transmitted by adopting an MQTT communication protocol, a field ammeter and an ordered electricity utilization charging pile are not changed, an HPLC carrier sub-node module is embedded in the ammeter and the ordered electricity utilization charging pile, the ordered electricity utilization charging pile displays three-phase voltage and current, daily electricity quantity, state, invitation and participation times in the month, and the conversion of the MQTT and DL/T645 multifunctional electric energy meter communication protocol and the DL/T698.45 object-oriented data exchange protocol is realized in the HPLC carrier sub-node module, so that the ammeter and the ordered electricity utilization charging pile end equipment become sub-nodes supporting the MQTT communication protocol;
s2: after the HPLC carrier sub-node module is accessed to a district HPLC network in a low-voltage power line carrier mode, an MQTT client logs in an MQTT proxy service end of a district energy Internet of things gateway at a power line carrier application layer, and electric meter data, events and reporting period parameters which are reported periodically are subscribed through the MQTT proxy service;
s3: the HPLC carrier wave sub-node module organizes DL/T645 or DL/T698.45 messages according to the parameters, converts the collected electric meter data into corresponding subject contents of an MQTT communication protocol, and then issues the corresponding subject contents to the district energy Internet of things gateway by using the MQTT communication protocol through a low-voltage power line high-speed carrier wave communication channel;
s4: the method comprises the steps that a 4G wireless communication channel is used for the on-line communication of a platform area energy Internet of things gateway to be connected with an Internet of things management platform, the on-line communication of the platform area energy Internet of things gateway is communicated with end equipment in a low-voltage power line high-speed carrier communication mode, an MQTT Broker is arranged in the platform area energy Internet of things gateway, and MQTT communication protocols are adopted in an uplink channel and a downlink channel;
s5: the method comprises the following steps that information interaction is carried out between an internet of things management platform in a cloud master station and side equipment on a station transformer side through an MQTT communication protocol, and the cloud master station is communicated with field equipment through the internet of things management platform;
s6: the information interaction between the cloud master station and the side equipment and the end equipment is carried out in a publishing and subscribing mode, the subscribing and the publishing are based on topics, the whole communication network is penetrated through by MQTT, the information interaction is completed by utilizing a publishing and subscribing mechanism, one-to-many information distribution is realized, all service nodes are equal in network, interconnected and non-hierarchical, and finally all the low-voltage distribution network terminal service equipment is visible in the whole network.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978591A (en) * | 2022-04-15 | 2022-08-30 | 国网上海能源互联网研究院有限公司 | Security protection-based field area network data interaction system and method |
| CN115086380A (en) * | 2022-07-25 | 2022-09-20 | 苏州思萃工业互联网技术研究所有限公司 | Data transmission system and method based on energy management platform |
Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016025687A (en) * | 2014-07-17 | 2016-02-08 | ソニー株式会社 | Power transmission/reception controller, power transmission/reception control method, and power transmission/reception control system |
| US20160334848A1 (en) * | 2014-10-29 | 2016-11-17 | Solarcity Corporation | Dynamic curtailment of an energy generation system |
| CN107171441A (en) * | 2017-07-14 | 2017-09-15 | 国网山东省电力公司淄博供电公司 | A kind of Electricity Information Network with clock synchronously with position location functionality |
| JP2017225262A (en) * | 2016-06-16 | 2017-12-21 | 人吉アサノ電機株式会社 | Power demand remote management system, demand controller, demand controller master unit, and power demand remote management method |
| CN109547538A (en) * | 2018-11-05 | 2019-03-29 | 广西大学 | Controller switching equipment condition monitoring system and implementation method based on technology of Internet of things |
| CN209233487U (en) * | 2018-12-29 | 2019-08-09 | 海南天能电力有限公司 | A kind of distributed energy power station data acquisition system based on MQTT agreement |
| CN110782367A (en) * | 2019-10-17 | 2020-02-11 | 国电南瑞南京控制系统有限公司 | Low-voltage power distribution Internet of things system and equipment plug-and-play method |
| CN110797975A (en) * | 2018-08-01 | 2020-02-14 | 中国电力科学研究院有限公司 | Intelligent transformer area system and management method |
| CN111028499A (en) * | 2019-11-14 | 2020-04-17 | 珠海许继电气有限公司 | Intelligent integration terminal for Internet of things platform area and data acquisition and processing method thereof |
| KR102107483B1 (en) * | 2019-07-19 | 2020-05-07 | 주식회사 에니텍시스 | IoT hybrid micro grid system |
| CN111371182A (en) * | 2020-04-08 | 2020-07-03 | 南京米特能源科技有限公司 | Power distribution area distributed energy storage system based on power internet of things and operation method |
| CN111371185A (en) * | 2020-04-17 | 2020-07-03 | 南京大全自动化科技有限公司 | Line loss monitoring system and method based on distribution transformer terminal |
| CN111478440A (en) * | 2020-04-17 | 2020-07-31 | 南京大全自动化科技有限公司 | Topology identification system and method based on distribution transformer terminal |
| CN211605668U (en) * | 2020-04-02 | 2020-09-29 | 国网天津市电力公司电力科学研究院 | Thing networking low-voltage distribution cabinet |
| CN112134293A (en) * | 2020-08-20 | 2020-12-25 | 国电南瑞科技股份有限公司 | Station terminal public unit and wide area autonomous method based on edge calculation |
| CN112542888A (en) * | 2020-12-08 | 2021-03-23 | 广东电网有限责任公司 | Method for realizing plug and play of power distribution and utilization intelligent equipment |
| CN112636462A (en) * | 2020-11-13 | 2021-04-09 | 国网浙江省电力有限公司湖州供电公司 | MQTT-based power distribution Internet of things system and method thereof |
| WO2021099933A1 (en) * | 2019-11-18 | 2021-05-27 | Arca Holding Associated Engineers Ltd | A power distribution system having a network of smart meters |
| CN112953001A (en) * | 2021-01-26 | 2021-06-11 | 中电装备山东电子有限公司 | Distributed transformer area substation device based on 4G |
| CN113346615A (en) * | 2021-06-01 | 2021-09-03 | 中国电力科学研究院有限公司 | Voltage fault monitoring method for transformer area and intelligent Internet of things agent device |
| CN113489138A (en) * | 2021-04-16 | 2021-10-08 | 国电南瑞科技股份有限公司 | Power utilization scheduling system and method suitable for multiple scenes |
| CN214543799U (en) * | 2021-02-25 | 2021-10-29 | 国网福建省电力有限公司 | Low-voltage transformer area mobile intelligent operation system based on intelligent terminal |
| CN113659713A (en) * | 2021-07-23 | 2021-11-16 | 石家庄科林电气股份有限公司 | Plug and play method for power distribution internet of things end-side equipment based on HPLC communication |
-
2021
- 2021-12-27 CN CN202111607191.4A patent/CN113991875B/en active Active
Patent Citations (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016025687A (en) * | 2014-07-17 | 2016-02-08 | ソニー株式会社 | Power transmission/reception controller, power transmission/reception control method, and power transmission/reception control system |
| US20160334848A1 (en) * | 2014-10-29 | 2016-11-17 | Solarcity Corporation | Dynamic curtailment of an energy generation system |
| JP2017225262A (en) * | 2016-06-16 | 2017-12-21 | 人吉アサノ電機株式会社 | Power demand remote management system, demand controller, demand controller master unit, and power demand remote management method |
| CN107171441A (en) * | 2017-07-14 | 2017-09-15 | 国网山东省电力公司淄博供电公司 | A kind of Electricity Information Network with clock synchronously with position location functionality |
| CN110797975A (en) * | 2018-08-01 | 2020-02-14 | 中国电力科学研究院有限公司 | Intelligent transformer area system and management method |
| CN109547538A (en) * | 2018-11-05 | 2019-03-29 | 广西大学 | Controller switching equipment condition monitoring system and implementation method based on technology of Internet of things |
| CN209233487U (en) * | 2018-12-29 | 2019-08-09 | 海南天能电力有限公司 | A kind of distributed energy power station data acquisition system based on MQTT agreement |
| KR102107483B1 (en) * | 2019-07-19 | 2020-05-07 | 주식회사 에니텍시스 | IoT hybrid micro grid system |
| CN110782367A (en) * | 2019-10-17 | 2020-02-11 | 国电南瑞南京控制系统有限公司 | Low-voltage power distribution Internet of things system and equipment plug-and-play method |
| CN111028499A (en) * | 2019-11-14 | 2020-04-17 | 珠海许继电气有限公司 | Intelligent integration terminal for Internet of things platform area and data acquisition and processing method thereof |
| WO2021099933A1 (en) * | 2019-11-18 | 2021-05-27 | Arca Holding Associated Engineers Ltd | A power distribution system having a network of smart meters |
| CN211605668U (en) * | 2020-04-02 | 2020-09-29 | 国网天津市电力公司电力科学研究院 | Thing networking low-voltage distribution cabinet |
| CN111371182A (en) * | 2020-04-08 | 2020-07-03 | 南京米特能源科技有限公司 | Power distribution area distributed energy storage system based on power internet of things and operation method |
| CN111478440A (en) * | 2020-04-17 | 2020-07-31 | 南京大全自动化科技有限公司 | Topology identification system and method based on distribution transformer terminal |
| CN111371185A (en) * | 2020-04-17 | 2020-07-03 | 南京大全自动化科技有限公司 | Line loss monitoring system and method based on distribution transformer terminal |
| CN112134293A (en) * | 2020-08-20 | 2020-12-25 | 国电南瑞科技股份有限公司 | Station terminal public unit and wide area autonomous method based on edge calculation |
| CN112636462A (en) * | 2020-11-13 | 2021-04-09 | 国网浙江省电力有限公司湖州供电公司 | MQTT-based power distribution Internet of things system and method thereof |
| CN112542888A (en) * | 2020-12-08 | 2021-03-23 | 广东电网有限责任公司 | Method for realizing plug and play of power distribution and utilization intelligent equipment |
| CN112953001A (en) * | 2021-01-26 | 2021-06-11 | 中电装备山东电子有限公司 | Distributed transformer area substation device based on 4G |
| CN214543799U (en) * | 2021-02-25 | 2021-10-29 | 国网福建省电力有限公司 | Low-voltage transformer area mobile intelligent operation system based on intelligent terminal |
| CN113489138A (en) * | 2021-04-16 | 2021-10-08 | 国电南瑞科技股份有限公司 | Power utilization scheduling system and method suitable for multiple scenes |
| CN113346615A (en) * | 2021-06-01 | 2021-09-03 | 中国电力科学研究院有限公司 | Voltage fault monitoring method for transformer area and intelligent Internet of things agent device |
| CN113659713A (en) * | 2021-07-23 | 2021-11-16 | 石家庄科林电气股份有限公司 | Plug and play method for power distribution internet of things end-side equipment based on HPLC communication |
Non-Patent Citations (2)
| Title |
|---|
| FANGLIAO YANG ET AL: "Design of universal edge IOT agent device for comprehensive monitoring of distribution room", 《2021 IEEE 4TH INTERNATIONAL ELECTRICAL AND ENERGY CONFERENCE (CIEEC)》 * |
| 王日宁等: "基于智能终端特征信号的配电网台区拓扑识别方法", 《电力系统保护与控制》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114978591A (en) * | 2022-04-15 | 2022-08-30 | 国网上海能源互联网研究院有限公司 | Security protection-based field area network data interaction system and method |
| CN114978591B (en) * | 2022-04-15 | 2024-02-23 | 国网上海能源互联网研究院有限公司 | Domain network data interaction system and method based on safety protection |
| CN115086380A (en) * | 2022-07-25 | 2022-09-20 | 苏州思萃工业互联网技术研究所有限公司 | Data transmission system and method based on energy management platform |
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