CN113079208A - Ethernet-based distributed control system and method for power distribution network - Google Patents
Ethernet-based distributed control system and method for power distribution network Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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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
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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
- H02J13/00016—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 a wired telecommunication network or a data transmission bus
- H02J13/00017—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 a wired telecommunication network or a data transmission bus using optical fiber
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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
- H02J13/00022—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
- H02J13/00026—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 involving a local wireless network, e.g. Wi-Fi, ZigBee or Bluetooth
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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
- H04L41/06—Management of faults, events, alarms or notifications
- H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
- H04L41/0659—Management of faults, events, alarms or notifications using network fault recovery by isolating or reconfiguring faulty entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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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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Abstract
The application relates to a power distribution network distributed control system and method based on Ethernet. The system comprises: the system comprises a measurement and control communication unit and a data acquisition and conversion unit; the measurement and control communication unit comprises a controller and a dual Ethernet switching unit connected with the controller; the data acquisition conversion unit comprises a management core and a protection core; the controller is used for controlling the dual-Ethernet switching unit to establish connection with the management core, constructing a first local area network for scheduling communication, controlling the dual-Ethernet switching unit to establish connection with the protection core, and constructing a second local area network for peer-to-peer communication. The system realizes the independent operation of the first local area network for dispatching communication and the second local area network for peer-to-peer communication, when the first local area network for dispatching communication or the second local area network for peer-to-peer communication fails, the other local area network is not affected, and the anti-interference capacity of power distribution network communication and the reliability of communication data are improved.
Description
Technical Field
The application relates to the technical field of power engineering, in particular to a power distribution network distributed control system and method based on Ethernet.
Background
With the increasing development of power engineering technology and the gradual construction of intelligent power distribution networks, various power distribution facilities are biased to be intelligent and networked, and the technical requirements on distribution network automation are higher and higher. Traditionally, the DTU three-remote station terminal is widely applied in distribution automation, wherein the DTU three-remote station terminal is mainly used for monitoring of places such as an switching station, a cable demarcation room, a ring main unit, a distribution room, a low-voltage transformer substation and the like, can complete monitoring of feeders inside the switching station, the cable demarcation room, the distribution room and the low-voltage transformer substation, can collect and control multiple lines, and further realizes different functions of feeder fault identification, fault detection, fault location, fault area isolation, non-fault area restoration power supply and the like.
The traditional DTU is composed of a DTU cabinet, a core processing unit, a communication unit and a backup power supply system, generally monitors 4-16 loops, and is redundant and complex in wiring. Meanwhile, in practical application, a terminal of the DTU three-remote station is installed in a ring main unit and used for achieving a three-remote function and a line loss acquisition function, a conventional protection function is achieved through a comprehensive measurement and control protection device installed on a switch cabinet, a built-in communication unit can only achieve internal communication, communication between the terminal of the DTU three-remote station and other protection functions cannot be achieved, a wireless communication device needs to be added, and the problems of poor communication anti-interference capability and low reliability easily exist.
Disclosure of Invention
In view of the foregoing, there is a need to provide a distributed control system and method for an ethernet-based power distribution network, which can improve the reliability of power distribution network communication.
An ethernet-based distributed control system for a power distribution network, the system comprising: the system comprises a measurement and control communication unit and a data acquisition and conversion unit; wherein:
the measurement and control communication unit comprises a controller and a dual Ethernet switching unit connected with the controller; the data acquisition conversion unit comprises a management core and a protection core; the controller is used for controlling the dual-Ethernet switching unit to establish connection with the management core, constructing a first local area network for scheduling communication, controlling the dual-Ethernet switching unit to establish connection with the protection core, and constructing a second local area network for peer-to-peer communication.
In one embodiment, the measurement and control communication unit includes a first ethernet interface, the data acquisition and conversion unit includes a second ethernet interface, and the first ethernet interface is connected to the second ethernet communication interface; the dual Ethernet switching unit comprises a scheduling communication switching subunit; the controller establishes a connection between the management core and the scheduling communication switching subunit through the first ethernet interface and the second ethernet interface, and constructs a first local area network for scheduling communication.
In one embodiment, the data acquisition and conversion unit includes a protocol conversion unit and a third ethernet interface connected to the protocol conversion unit, the measurement and control communication unit includes a fourth ethernet interface, and the third ethernet interface is connected to the fourth ethernet interface; the dual Ethernet switching unit comprises a peer-to-peer communication switching subunit; the protection core is connected with the protocol conversion unit, and the controller establishes connection between the protection core and the peer-to-peer communication exchange subunit through the third ethernet interface and the fourth ethernet interface to construct a second local area network for peer-to-peer communication.
In one embodiment, the data acquisition conversion unit comprises a first serial peripheral interface, and the protection core is connected with the first analog-to-digital conversion unit through the serial peripheral interface; the protection core acquires protection loop current, measurement loop current and voltage loop voltage through the first mode conversion unit.
In one embodiment, the measurement and control communication unit comprises a second serial peripheral interface, and the controller is connected with the second analog-to-digital conversion unit through the second serial peripheral interface; and the controller acquires the voltage of the bus voltage loop through the second mode conversion unit.
In one embodiment, the measurement and control communication unit includes a third serial peripheral interface and an ethernet interface unit connected to the third serial peripheral interface, and the ethernet interface unit is connected to the first ethernet interface; the controller establishes connection between the management core and the scheduling communication switching subunit through the first ethernet interface connected to the ethernet interface unit and the second ethernet interface, and constructs a first local area network for scheduling communication.
In one embodiment, the data acquisition conversion unit comprises a general input/output port, and the protection core is connected with the photoelectric isolator and the relay isolator through the general input/output port; and the protection core acquires the switching value of the open-close loop through the photoelectric isolator and the relay isolator.
In one embodiment, the data acquisition and conversion unit comprises a preset communication interface unit; the management core is connected with the preset communication interface unit, is connected with a temperature sensor and a partial discharge sensor of a switch cabinet of the data acquisition and conversion unit through the preset communication interface unit, and is used for acquiring corresponding temperature sensor data and partial discharge sensor data.
In one embodiment, the measurement and control communication unit further comprises a communication unit and a security encryption unit which are connected with the controller; the communication unit comprises a wireless communication unit and a Bluetooth communication unit; the controller is connected with the safety encryption unit through a fifth Ethernet interface, connected with the Bluetooth communication unit through a Bluetooth interface and connected with the wireless communication unit through an asynchronous communication interface; the wireless communication unit is connected with the safety encryption unit through a universal serial bus interface.
A distributed control method for an ethernet-based power distribution network, the method comprising:
the dual Ethernet exchange unit for controlling the measurement and control communication unit is connected with the management core of the data acquisition and conversion unit to construct a first local area network for dispatching communication, and is controlled to be connected with the protection core of the data acquisition and conversion unit to construct a second local area network for peer-to-peer communication.
In the system and the method for the distributed control of the power distribution network based on the Ethernet, the controller establishes connection with the management core of the data acquisition and conversion unit through the dual Ethernet switching unit which controls the measurement and control communication unit, so as to construct a first local area network for dispatching communication, and controls the dual Ethernet switching unit to establish connection with the protection core of the data acquisition and conversion unit, so as to construct a second local area network for peer-to-peer communication. The system realizes the independent operation of the first local area network for dispatching communication and the second local area network for peer-to-peer communication, when the first local area network for dispatching communication or the second local area network for peer-to-peer communication fails, the other local area network is not affected, and the anti-interference capacity of power distribution network communication and the reliability of communication data are improved.
Drawings
FIG. 1 is a schematic diagram of a system architecture of a distributed control system for an Ethernet-based power distribution network according to an embodiment;
FIG. 2 is a schematic structural diagram of a measurement and control communication unit in one embodiment;
FIG. 3 is a schematic diagram of the connection of components of the measurement and control communication unit in one embodiment;
FIG. 4 is a schematic diagram of a data acquisition and conversion unit according to an embodiment;
FIG. 5 is a schematic diagram of the connection of components of the data acquisition conversion unit in one embodiment;
fig. 6 is a schematic system architecture diagram of a distributed control system of an ethernet-based power distribution network according to another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In an embodiment, as shown in fig. 1, a system architecture of an ethernet-based power distribution network distributed control system is provided, and as can be seen from fig. 1, the ethernet-based power distribution network distributed control system includes a measurement and control communication unit 10 and a data acquisition and conversion unit 30, where the measurement and control communication unit 10 includes a controller 102, and an ethernet switching unit 104 connected to the controller 102, and the data acquisition and conversion unit 30 includes a management core 302 and a protection core 304. Wherein the controller 102 is configured to:
controlling dual ethernet switching unit 104 to establish a connection with management core 302 to construct a first local area network for scheduling communications, and controlling dual ethernet switching unit 104 to establish a connection with protection core 304 to construct a second local area network for peer-to-peer communications.
Specifically, the measurement and control communication unit 10 is installed in a voltage transformer cabinet in the ring main unit, and is used for scheduling communication management and communication management with the data acquisition and conversion unit 30, and the data acquisition and conversion unit 30 is installed in a switch cabinet in the ring main unit and is used for communication management with the measurement and control communication unit 10, and has different functions of analog quantity acquisition, switch quantity acquisition, conventional protection, voltage time type feeder automation, intelligent distributed feeder automation and the like.
Further, a dual ethernet local area network is constructed from the dual ethernet switching unit 104, including a first local area network for scheduling communications and a second local area network for peer-to-peer communications. The first local area network adopts a DL104 communication protocol for realizing scheduling communication, and the second local area network adopts an IEC61850+ GOOSE communication protocol for realizing peer-to-peer communication and an intelligent distributed feeder automation function.
The dual ethernet switching unit 104 includes an electrical port scheduling industrial switch module, i.e., a scheduling communication switching subunit, and a peer communication industrial switch module, i.e., a peer communication switching subunit. The first local area network is composed of an electric port dispatching industrial switch module of the measurement and control communication unit 10 and a first Ethernet in the data acquisition and conversion unit 30, and the second local area network is composed of a peer-to-peer communication industrial switch module of the measurement and control communication unit 10 and a second Ethernet in the data acquisition and conversion unit 30.
In an embodiment, as shown in fig. 2, a schematic structural diagram of a measurement and control communication unit is provided, and as can be known from fig. 2, the measurement and control communication unit includes a controller, a touch display panel, a wireless communication unit, a bluetooth communication unit, a security encryption unit, a bus voltage sampling unit, a switching value acquisition unit, a first ethernet interface (DL104), a fourth ethernet interface (FA), a power supply unit, and a preset communication interface unit, where:
the touch display panel can be a 7-inch TFT liquid crystal display screen with a touch screen function, the wireless communication unit can be a 4G-LET wireless communication unit, the bus voltage sampling unit is used for acquiring bus county officer loop voltage, the on-acquisition turn-off acquisition unit is used for realizing 16-path switching value acquisition, the first Ethernet interface is used for establishing connection with a management core of the data acquisition conversion unit, the fourth Ethernet interface is used for establishing connection with a protection core of the data acquisition conversion unit 30, and the preset communication interface unit (RS485) is used for realizing a controller and establishing communication connection with a voltage mutual inductor cabinet provided with the measurement and control communication unit.
In the distributed control system of the power distribution network based on the Ethernet, the controller establishes connection with the management core of the data acquisition and conversion unit through the dual Ethernet switching unit which controls the measurement and control communication unit, so as to construct a first local area network for scheduling communication, and controls the dual Ethernet switching unit to establish connection with the protection core of the data acquisition and conversion unit, so as to construct a second local area network for peer-to-peer communication. The system realizes the independent operation of the first local area network for dispatching communication and the second local area network for peer-to-peer communication, when the first local area network for dispatching communication or the second local area network for peer-to-peer communication fails, the other local area network is not affected, and the anti-interference capacity of power distribution network communication and the reliability of communication data are improved.
In an embodiment, as shown in fig. 3, a component connection schematic diagram of a measurement and control communication unit is provided, as can be seen from fig. 3, in the measurement and control communication unit, a controller is an embedded core module carrying a Linux operating system, a touch screen interface and a liquid crystal display interface are provided in the embedded core module, the embedded core module is used for connecting a touch display panel, i.e., a 7-inch TFT liquid crystal display screen with a capacitive touch screen, a first asynchronous communication interface (UART1) is provided for connecting a communication interface unit, i.e., a 2RS485 interface chip, a bluetooth interface is provided for connecting a short-distance bluetooth module, i.e., a bluetooth communication unit, and a second asynchronous communication interface (UART2) is provided for connecting a 4G-LTE wireless module, i.e., a wireless communication module.
In one embodiment, the measurement and control communication unit comprises a first ethernet interface, the data acquisition and conversion unit comprises a second ethernet interface, the first ethernet interface is connected with the second ethernet communication interface, and the dual-ethernet switching unit comprises a scheduling communication switching subunit. The controller establishes connection between the management core and the scheduling communication switching subunit through the first Ethernet interface and the second Ethernet interface, and constructs a first local area network for scheduling communication. The measurement and control communication unit comprises a fourth Ethernet interface, the data acquisition conversion unit comprises a third Ethernet interface, the third Ethernet interface is connected with the fourth Ethernet interface, the dual-Ethernet exchange unit comprises a peer-to-peer communication exchange subunit, and the controller establishes connection between the protection core and the peer-to-peer communication exchange subunit through the third Ethernet interface and the fourth Ethernet interface to construct a second local area network for peer-to-peer communication.
Further, referring to fig. 3, a third serial peripheral interface (SPI2 interface) for connecting an ethernet interface unit, i.e. an ethernet interface chip, is further disposed on the embedded core module, wherein the ethernet interface chip is connected to a dispatch communication switching subunit, i.e. an ethernet switch, i.e. module 1, and the ethernet switch, i.e. module 1, is connected to the first ethernet interface (DL104), and further comprises an ethernet interface 1 for a peer-to-peer communication switching subunit, i.e. an ethernet switch module 2, wherein the ethernet switch module 2 is further connected to the first ethernet interface (FA).
In one embodiment, a second serial peripheral interface (SPI1 interface) for connecting a second analog-to-digital conversion unit, that is, an analog-to-digital conversion chip is further provided in the embedded core module, wherein the controller, that is, the embedded core module, is connected to the second analog-to-digital conversion unit through the second serial peripheral interface, and collects the bus voltage loop voltage through the second mode conversion unit.
Similarly, an ethernet interface 2, i.e. a fifth ethernet interface, is further provided at the embedded core module for connecting with a security encryption unit, i.e. an encryption module, wherein the encryption module and the 4G-LTE module are connected by a USB, i.e. a universal serial bus, and a general purpose input/output port (GPIO port) is further provided for connecting with the optical isolator.
In one embodiment, as shown in fig. 4, a structural schematic diagram of a data acquisition and conversion unit is provided, and as can be seen from fig. 4, the data acquisition and conversion unit includes a management core, a protection loop, a measurement loop, a voltage loop, an open-close loop, a second ethernet interface (FA), a third ethernet interface (DL104), a preset communication interface unit (RS485), and a power supply unit, where:
the management core is used for realizing communication management between the communication units and the measurement and control units, and the protection core is used for realizing different functions of analog quantity acquisition, switching quantity acquisition, conventional protection, voltage time type feeder automation, intelligent distributed feeder automation and the like.
The protection circuit is used for providing protection circuit current collection through the aerial insertion, the measurement circuit is used for providing measurement circuit current collection through the aerial insertion, the voltage circuit is used for providing voltage circuit voltage collection through the aerial insertion, and the opening-in and opening-out circuit is used for providing opening-in and opening-out amount collection through the aerial insertion.
The second Ethernet interface (FA) is used for being connected with the first Ethernet interface of the measurement and control communication unit, wherein the dual Ethernet switching unit of the measurement and control communication unit comprises a scheduling communication switching subunit, and the first local area network used for scheduling communication is constructed by establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface and the second Ethernet interface.
The third Ethernet interface is used for being connected with a fourth Ethernet interface of the measurement and control communication unit, wherein the dual-Ethernet exchange unit of the measurement and control communication unit comprises a peer-to-peer communication exchange subunit, and the connection between the protection core and the peer-to-peer communication exchange subunit is established through the third Ethernet interface and the fourth Ethernet interface to construct a second local area network for peer-to-peer communication.
The preset communication interface unit is used for being connected with the management core, and the management core is connected with a temperature sensor and a partial discharge sensor of a switch cabinet provided with the data acquisition and conversion unit through the preset communication interface unit to acquire corresponding temperature sensor data and partial discharge sensor data.
In an embodiment, as shown in fig. 5, a component connection diagram of a data acquisition conversion unit is provided, and as can be seen from fig. 5, the data acquisition conversion unit includes a management core and a protection core, where the management core and the protection core are both provided with UART2 interfaces for implementing inter-core data exchange between the management core and the protection core.
In one embodiment, the measurement and control communication unit comprises a first ethernet interface, the data acquisition and conversion unit comprises a second ethernet interface, and the first ethernet interface is connected with the second ethernet communication interface. The dual Ethernet switching unit of the measurement and control communication unit comprises a scheduling communication switching subunit, and establishes connection between a management core and the scheduling communication switching subunit through a first Ethernet interface and a second Ethernet interface to construct a first local area network for scheduling communication.
Further, referring to fig. 5, a serial peripheral interface (SPI interface) is provided on the management core for connecting with an ethernet chip, i.e., an ethernet interface unit, wherein the ethernet interface chip is connected with a second ethernet interface (RJ45(DL 104)). The management core can realize four remote functions including remote measurement, remote signaling, remote control and remote tuning through the first local area network.
In one embodiment, the data acquisition and conversion unit further includes a protocol conversion unit and a third ethernet interface connected to the protocol conversion unit, and the measurement and control communication unit includes a fourth ethernet interface, and the third ethernet interface is connected to the fourth ethernet interface. The dual Ethernet exchange unit of the measurement and control communication unit comprises a peer-to-peer communication exchange subunit, the protection core is connected with the protocol conversion unit, the connection between the protection core and the peer-to-peer communication exchange subunit is established through the third Ethernet interface and the fourth Ethernet interface, and a second local area network for peer-to-peer communication is established.
Further, referring to fig. 5, a UART1 interface for connecting a protocol conversion unit, i.e., an IEC61850 protocol conversion module, is disposed on the protection core, wherein the IEC61850 protocol conversion module is further connected to a third ethernet interface, i.e., a 2RJ45(FA) interface.
In one embodiment, the data acquisition conversion unit comprises a first serial peripheral interface, and the protection core is connected with the first analog-to-digital conversion unit through the serial peripheral interface; the protection core collects protection loop current, measurement loop current and voltage loop voltage through the first mode conversion unit.
Further, referring to fig. 5, a first serial peripheral interface (SPI1 interface) is disposed on the protection core and is configured to be connected to the first analog-to-digital conversion unit, i.e., the analog-to-digital conversion chip, wherein the analog-to-digital conversion chip is further connected to the protection loop, the measurement loop, and the voltage loop and is configured to collect a current of the protection loop, a current of the measurement loop, and a voltage of the voltage loop.
In one embodiment, the data acquisition conversion unit comprises a general input/output port, and the protection core is connected with the photoelectric isolator and the relay isolator through the general input/output port; the protective core collects the switching value of the open-close loop through the photoelectric isolator and the relay isolator.
Further, referring to fig. 5, it can be known that the protection core is provided with a general purpose input/output port, i.e., a GPIO port, for connecting with the optical isolator and the relay isolator, and the protection core collects the switching value of the input/output loop through the optical isolator and the relay isolator.
In one embodiment, the data acquisition conversion unit comprises a preset communication interface unit; the management core is connected with the preset communication interface unit, is connected with the temperature sensor and the partial discharge sensor of the switch cabinet provided with the data acquisition and conversion unit through the preset communication interface unit, and is used for acquiring corresponding temperature sensor data and partial discharge sensor data.
Specifically, as can be seen from fig. 5, the management core is provided with a serial peripheral interface (SPI1 interface) for connecting with a preset communication interface unit, that is, an RS485 interface chip, and is connected with a temperature sensor and a partial discharge sensor of a switch cabinet provided with a data acquisition and conversion unit through the preset communication interface unit, so as to obtain corresponding temperature sensor data and partial discharge sensor data.
In one embodiment, as shown in fig. 6, a system architecture diagram of a distributed control system of an ethernet-based power distribution network is provided, and as can be seen from fig. 6, a dual daisy chain for fiber-optic communication is adopted between a power house and a power house, including a scheduling communication daisy chain and a peer-to-peer communication daisy chain, wherein the scheduling communication daisy chain is used for connecting scheduling communication between the power house and the power house, and the peer-to-peer communication daisy chain is used for connecting peer-to-peer communication between the power house and the power house. Meanwhile, the double Ethernet local area networks in the electric rooms and the optical fiber communication double daisy chains between the electric rooms form a dispatching communication local area network and a peer-to-peer communication local area network of the whole system.
Further, referring to fig. 6, it can be seen that the measurement and control communication unit is provided with a plurality of ethernet interfaces, which can be respectively connected to the plurality of data acquisition and conversion units, wherein the data acquisition and conversion unit is provided with a DL104 ethernet interface and an FA ethernet interface, and the DL104 ethernet interface is used for being connected to the ethernet interface of the measurement and control communication unit and constructing a first local area network for scheduling communication. And the FA Ethernet interface is used for being connected with the Ethernet interface of the measurement and control communication unit and constructing a second local area network for peer-to-peer communication. The measurement and control communication unit is also provided with a 2GE interface, and realizes communication with an upper-level electric room through an upper-level electric room optical fiber comprising a scheduling communication daisy chain and a peer-to-peer communication daisy chain.
In one embodiment, a distributed control method for an ethernet-based power distribution network is provided, the method comprising:
the dual Ethernet exchange unit for controlling the measurement and control communication unit is connected with the management core of the data acquisition and conversion unit to construct a first local area network for dispatching communication, and the dual Ethernet exchange unit is controlled to be connected with the protection core of the data acquisition and conversion unit to construct a second local area network for peer-to-peer communication.
In the distributed control method for the power distribution network based on the Ethernet, the dual-Ethernet switching unit for controlling the measurement and control communication unit is connected with the management core of the data acquisition and conversion unit to construct a first local area network for dispatching communication, and the dual-Ethernet switching unit is controlled to be connected with the protection core of the data acquisition and conversion unit to construct a second local area network for peer-to-peer communication. The method realizes the independent operation of the first local area network for dispatching communication and the second local area network for peer-to-peer communication, when the first local area network for dispatching communication or the second local area network for peer-to-peer communication fails, the other local area network is not affected, and the anti-interference capability of power distribution network communication and the reliability of communication data are improved.
In one embodiment, the dual ethernet switching unit includes a scheduling communication switching subunit, the measurement and control communication unit includes a first ethernet interface, and the data acquisition and conversion unit includes a second ethernet interface; the method comprises the following steps that a dual Ethernet exchange unit for controlling a measurement and control communication unit establishes connection with a management core of a data acquisition and conversion unit, and constructs a first local area network for dispatching communication, and comprises the following steps:
and establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface and the second Ethernet interface, and constructing a first local area network for scheduling communication.
In one embodiment, the dual-ethernet switching unit comprises a peer-to-peer communication switching subunit, the data acquisition and conversion unit comprises a protocol conversion unit and a third ethernet interface connected with the protocol conversion unit, the measurement and control communication unit comprises a fourth ethernet interface, and the third ethernet interface is connected with the fourth ethernet interface; the step of controlling the dual-Ethernet switching unit to establish connection with the protection core of the data acquisition and conversion unit and constructing a second local area network for peer-to-peer communication comprises the following steps:
and establishing connection between the protection core and the peer-to-peer communication exchange subunit through the third Ethernet interface and the fourth Ethernet interface, and constructing a second local area network for peer-to-peer communication.
In one embodiment, the measurement and control communication unit comprises a third serial peripheral interface and an Ethernet interface unit connected with the third serial peripheral interface, and the Ethernet interface unit is connected with the first Ethernet interface; the method comprises the following steps that a dual Ethernet exchange unit for controlling a measurement and control communication unit establishes connection with a management core of a data acquisition and conversion unit, and constructs a first local area network for dispatching communication, and comprises the following steps:
and establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface connected with the Ethernet interface unit and the second Ethernet interface, and constructing a first local area network for scheduling communication.
It should be understood that the execution of the various steps involved in the above embodiments is not strictly limited by the order in which the steps may be executed in other orders. Moreover, at least a part of the steps in each flowchart related to the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
the dual Ethernet exchange unit for controlling the measurement and control communication unit is connected with the management core of the data acquisition and conversion unit to construct a first local area network for dispatching communication, and the dual Ethernet exchange unit is controlled to be connected with the protection core of the data acquisition and conversion unit to construct a second local area network for peer-to-peer communication.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface and the second Ethernet interface, and constructing a first local area network for scheduling communication.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and establishing connection between the protection core and the peer-to-peer communication exchange subunit through the third Ethernet interface and the fourth Ethernet interface, and constructing a second local area network for peer-to-peer communication.
In one embodiment, the processor, when executing the computer program, further performs the steps of:
and establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface connected with the Ethernet interface unit and the second Ethernet interface, and constructing a first local area network for scheduling communication.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
the dual Ethernet exchange unit for controlling the measurement and control communication unit is connected with the management core of the data acquisition and conversion unit to construct a first local area network for dispatching communication, and the dual Ethernet exchange unit is controlled to be connected with the protection core of the data acquisition and conversion unit to construct a second local area network for peer-to-peer communication.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface and the second Ethernet interface, and constructing a first local area network for scheduling communication.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and establishing connection between the protection core and the peer-to-peer communication exchange subunit through the third Ethernet interface and the fourth Ethernet interface, and constructing a second local area network for peer-to-peer communication.
In one embodiment, the computer program when executed by the processor further performs the steps of:
and establishing connection between the management core and the scheduling communication switching subunit through the first Ethernet interface connected with the Ethernet interface unit and the second Ethernet interface, and constructing a first local area network for scheduling communication.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An ethernet-based distributed control system for a power distribution network, the system comprising: the system comprises a measurement and control communication unit and a data acquisition and conversion unit; wherein:
the measurement and control communication unit comprises a controller and a dual Ethernet switching unit connected with the controller; the data acquisition conversion unit comprises a management core and a protection core; the controller is used for controlling the dual-Ethernet switching unit to establish connection with the management core, constructing a first local area network for scheduling communication, controlling the dual-Ethernet switching unit to establish connection with the protection core, and constructing a second local area network for peer-to-peer communication.
2. The system of claim 1, wherein the measurement and control communication unit comprises a first ethernet interface, the data acquisition and conversion unit comprises a second ethernet interface, and the first ethernet interface is connected with the second ethernet communication interface; the dual Ethernet switching unit comprises a scheduling communication switching subunit; the controller establishes a connection between the management core and the scheduling communication switching subunit through the first ethernet interface and the second ethernet interface, and constructs a first local area network for scheduling communication.
3. The system of claim 1, wherein the data acquisition and conversion unit comprises a protocol conversion unit and a third ethernet interface connected with the protocol conversion unit, the measurement and control communication unit comprises a fourth ethernet interface, and the third ethernet interface is connected with the fourth ethernet interface; the dual Ethernet switching unit comprises a peer-to-peer communication switching subunit; the protection core is connected with the protocol conversion unit, and the controller establishes connection between the protection core and the peer-to-peer communication exchange subunit through the third ethernet interface and the fourth ethernet interface to construct a second local area network for peer-to-peer communication.
4. The system according to any one of claims 1 to 3, wherein the data acquisition conversion unit comprises a first serial peripheral interface, and the protection core is connected with the first analog-to-digital conversion unit through the serial peripheral interface; the protection core acquires protection loop current, measurement loop current and voltage loop voltage through the first mode conversion unit.
5. The system according to any one of claims 1 to 3, wherein the measurement and control communication unit comprises a second serial peripheral interface, and the controller is connected with a second analog-to-digital conversion unit through the second serial peripheral interface; and the controller acquires the voltage of the bus voltage loop through the second mode conversion unit.
6. The system of claim 2, wherein the measurement and control communication unit comprises a third serial peripheral interface and an ethernet interface unit connected with the third serial peripheral interface, and the ethernet interface unit is connected with the first ethernet interface; the controller establishes connection between the management core and the scheduling communication switching subunit through the first ethernet interface connected to the ethernet interface unit and the second ethernet interface, and constructs a first local area network for scheduling communication.
7. The system according to any one of claims 1 to 3, wherein the data acquisition conversion unit comprises a general input/output port, and the protection core is connected with the photoelectric isolator and the relay isolator through the general input/output port; and the protection core acquires the switching value of the open-close loop through the photoelectric isolator and the relay isolator.
8. The system according to any one of claims 1 to 3, wherein the data acquisition and conversion unit comprises a preset communication interface unit; the management core is connected with the preset communication interface unit, is connected with a temperature sensor and a partial discharge sensor of a switch cabinet of the data acquisition and conversion unit through the preset communication interface unit, and is used for acquiring corresponding temperature sensor data and partial discharge sensor data.
9. The system according to any one of claims 1 to 3, wherein the measurement and control communication unit further comprises a communication unit and a secure encryption unit connected with the controller; the communication unit comprises a wireless communication unit and a Bluetooth communication unit; the controller is connected with the safety encryption unit through a fifth Ethernet interface, connected with the Bluetooth communication unit through a Bluetooth interface and connected with the wireless communication unit through an asynchronous communication interface; the wireless communication unit is connected with the safety encryption unit through a universal serial bus interface.
10. A distributed control method for a power distribution network based on Ethernet is characterized by comprising the following steps:
the dual Ethernet exchange unit for controlling the measurement and control communication unit is connected with the management core of the data acquisition and conversion unit to construct a first local area network for dispatching communication, and is controlled to be connected with the protection core of the data acquisition and conversion unit to construct a second local area network for peer-to-peer communication.
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Effective date of registration: 20230420 Address after: Full Floor 14, Unit 3, Building 2, No. 11, Middle Spectra Road, Huangpu District, Guangzhou, Guangdong 510700 Patentee after: China Southern Power Grid Digital Grid Technology (Guangdong) Co.,Ltd. Address before: Room 86, room 406, No.1, Yichuang street, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou City, Guangdong Province Patentee before: Southern Power Grid Digital Grid Research Institute Co.,Ltd. |