CN113300464B - Information interaction method of load control terminal - Google Patents
Information interaction method of load control terminal Download PDFInfo
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- CN113300464B CN113300464B CN202110531525.8A CN202110531525A CN113300464B CN 113300464 B CN113300464 B CN 113300464B CN 202110531525 A CN202110531525 A CN 202110531525A CN 113300464 B CN113300464 B CN 113300464B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000003993 interaction Effects 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims abstract description 44
- 230000002776 aggregation Effects 0.000 claims abstract description 28
- 238000004220 aggregation Methods 0.000 claims abstract description 28
- 238000012482 interaction analysis Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a load control terminal information interaction method, which comprises the following steps: the nearby collecting station automatically matches the identity of the load control terminal according to the number of the receiving port and the Label identifier sent by the load control terminal, and obtains a terminal information interaction analysis table corresponding to the identity of the load control terminal; the nearby aggregation station analyzes the state information and the data information sent by the load control terminal according to the terminal information interaction analysis table to generate terminal information elements, and sends the terminal information elements to the upper control station according to a communication protocol with the upper control station at preset intervals; the nearby aggregation station analyzes command information issued by the upper control station according to a communication protocol with the upper control station, generates terminal command messages of all ports according to the command information and the terminal information interaction analysis table, and sends the terminal command messages to a plurality of load control terminals for communication through all ports; the real-time requirement of millisecond-level quick response of the millisecond-level accurate load shedding control system can be met.
Description
Technical Field
The invention relates to the technical field of power automation, in particular to a load control terminal information interaction method.
Background
Along with the vigorous development of the power industry, a power supply end presents polymorphic distribution, and the high-speed continuous growth of polymorphic energy sources such as power generation lines, hydropower, wind power, nuclear power and the like is imperative to influence the safety of a power grid, and the addition of energy sources such as large-scale wind energy, solar energy, hydropower and the like can generate fluctuation to the power grid, so that the quality of electric energy is reduced. At this time, a load system corresponding to the new energy source is necessary to ensure the quality of the electric energy. The accurate load control system is mainly used for comprehensively configuring power grid resources and loads, realizing mutual interaction of power supply, power grid and user loads, and improving the extra-high voltage fault emergency response capability of the power grid.
The load control terminal is installed at 10kV/380V voltage level of the user. The load has small granularity, can be regulated according to the power shortage of the power supply side, and has small regulating error. The system not only meets the requirements of rapidness and safety of the traditional load shedding control system, but also realizes the accurate control of the interruptible load of enterprise users, and improves the refinement level of the emergency load shedding control; meanwhile, the system can effectively cut loads before disconnection of the new energy grid-connected point of the new energy system with small distributed power generation capacity, and the new energy grid-connection is ensured.
In the process of implementing the present invention, the inventor finds that at least the following technical problems exist in the prior art: in the accurate load control system, load control terminals are arranged on a user side, are distributed and huge in quantity and comprise hundreds of control terminals, meanwhile, the real-time performance of information processing is high, particularly, a downlink control command needs millisecond-level quick response, and the traditional method for collecting and interacting load control information is difficult to meet the requirements of the information processing capability and the real-time performance.
Disclosure of Invention
The invention aims to provide a method, a device and a storage medium for information interaction of a load control terminal so as to solve the technical problems.
To achieve the above object, an embodiment of the present invention provides a load control terminal information interaction method, where the method is applied to any one of a plurality of nearby information collecting stations of a millisecond-level accurate load shedding control system, each nearby information collecting station is respectively in communication connection with a superior control station and a plurality of load control terminals through corresponding ports, and each port is provided with a unique number, and the method is characterized in that the method includes:
the nearby collecting station automatically matches the identity of the load control terminal according to the number of the receiving port and the Label identifier sent by the load control terminal, and obtains a terminal information interaction analysis table corresponding to the identity of the load control terminal;
the nearby aggregation station analyzes the state information and the data information sent by the load control terminal according to the terminal information interaction analysis table to generate terminal information elements, and sends the terminal information elements to the upper control station according to a communication protocol with the upper control station at preset intervals;
the nearby aggregation station analyzes command information issued by the upper control station according to a communication protocol with the upper control station, generates terminal command messages of all ports according to the command information and the terminal information interaction analysis table, and sends the terminal command messages to a plurality of load control terminals for communication through all ports.
Optionally, the communication ports between the nearby aggregation station and the plurality of load control terminals adopt ethernet communication interfaces, each nearby aggregation station is provided with 8 point-to-point optical fiber communication ports with the load control terminals, and the nearby aggregation station device supports multistage cascading, so as to meet the requirement of simultaneously connecting more than 8 load control terminals.
Optionally, the communication between the nearby aggregation station and the upper control station adopts 2M special channel communication based on SDH transmission network, and the communication protocol adopts HDLC protocol.
Optionally, the upper control station is a load control master station or a load control substation.
Optionally, the Label identifier includes a load control terminal number and a protocol type, and identifies whether the load control terminal is a load control terminal to be accessed by a receiving port according to the load control terminal number and the receiving port number, and matches a terminal information interaction analysis table according to the protocol type, where the terminal information interaction analysis table is pre-stored in an internal RAM area near the aggregation station, and the terminal information interaction analysis table is used for analyzing uplink and downlink messages.
Optionally, the state information includes an abnormal state of the load control terminal, a communication link state, and a functional press plate state; the data information comprises the load line active power and the actual cutting power which are acquired and calculated by the load control terminal.
Optionally, the analyzing the status information and the data information sent by the load control terminal generates a terminal information element, which includes:
and extracting state information and data information from the data uploaded by the load control terminal according to the terminal information interaction analysis table, and filling the extracted state information and data information into terminal information elements.
Optionally, the terminal information element is fed by a wheel-change feeding mode, and the terminal information elements of the load control terminal are fed at a time; the nearby sink station adopts frame number to identify the identity of the load control terminal according to the communication protocol with the upper control station.
Optionally, the nearby collection station is deployed at a 110kV voltage class transformer substation or a park substation on the power grid side, and the load control terminal is deployed at a 10kV large subscriber station, a 10kV ring main unit or a 380V subscriber side.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a method for information interaction of a load control terminal according to an exemplary embodiment.
FIG. 2 is a block diagram illustrating a millisecond level fine cut load control system in accordance with an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating generation of a terminal information interaction resolution table of a nearby sink station to a terminal by a millisecond level fine cut load control system according to an exemplary embodiment.
Fig. 4 is a schematic diagram illustrating a millisecond level fine cut load control system generating terminal information elements about information of a sink receiving terminal in accordance with an exemplary embodiment.
Fig. 5 is a schematic diagram illustrating a millisecond level fine cut load control system sending a message to a higher level control station by a nearby sink station according to a generated terminal information element according to an exemplary embodiment.
Fig. 6 is a schematic diagram illustrating a millisecond level fine cut load control system receiving superior control commands at a nearby sink station, generating and issuing terminal control commands in real time, according to an example embodiment.
Fig. 7 is a diagram of a millisecond level fine cut load control system architecture, shown according to an application example.
Detailed Description
Various exemplary embodiments, features and aspects of the disclosure will be described in detail below with reference to the drawings. In addition, numerous specific details are set forth in the following examples in order to provide a better illustration of the invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, well known means have not been described in detail in order to not obscure the present invention.
The embodiment of the invention provides a load control terminal information interaction method, which is applied to any one of a plurality of nearby information collecting stations of a millisecond-level accurate load shedding control system, wherein each nearby information collecting station is respectively in communication connection with a superior control station and a plurality of load control terminals through corresponding ports, and each port is provided with a unique number, and referring to fig. 1, the method comprises the following steps:
step S1, the nearby collecting station automatically matches the identity of the load control terminal according to the number of the receiving port and the Label identifier sent by the load control terminal, and obtains a terminal information interaction analysis table corresponding to the identity of the load control terminal;
s2, the nearby aggregation station analyzes the state information and the data information sent by the load control terminal according to the terminal information interaction analysis table to generate terminal information elements, and sends the terminal information elements to the upper control station according to a communication protocol with the upper control station at preset intervals;
and S3, analyzing command information issued by the upper control station by the nearby aggregation station according to a communication protocol with the upper control station, generating terminal command messages of all ports according to the command information and the terminal information interaction analysis table, and sending the terminal command messages to a plurality of load control terminals for communication through all ports.
Illustratively, the communication protocol between the nearby sink station and the upper station may be in the protocol manner defined in table 1:
TABLE 1
Specifically, as shown in fig. 2, in the system framework of the millisecond-level precise load shedding control system, each load control terminal is configured to generate state information and data information of the load control terminal according to acquired data information of a power load (not shown in the figure) connected with the load control terminal, and send the state information and the data information to a nearby information collection station connected with the load control terminal, and each nearby collection station can be connected with a plurality of load control terminals subordinate to the nearby collection station through high-speed ethernet interconnection, where the high-speed ethernet can be expressed as ethernet with a rate reaching or exceeding 100Mb/s (megabits per second), and the type of the high-speed ethernet communication interface is not limited in the embodiments of the present disclosure; each nearby aggregation station is connected with its subordinate control station, and uses 2M special channel communication based on SDH transmission network.
Referring to fig. 3, the communication ports between the nearby aggregation stations and the plurality of load control terminals use ethernet communication interfaces, each nearby aggregation station is provided with 8 point-to-point optical fiber communication ports with the load control terminals, and the nearby aggregation station device supports multistage cascading, so as to meet the requirement of simultaneously connecting more than 8 load control terminals.
And the communication between the nearby aggregation station and the upper control station adopts 2M special channel communication based on an SDH transmission network, and the communication protocol adopts HDLC protocol.
The upper control station is a load control master station or a load control substation.
The Label identification comprises a load control terminal number and a protocol type, whether the load control terminal is a load control terminal which is required to be accessed by a receiving port is identified according to the load control terminal number and the receiving port number, and a terminal information interaction analysis table is matched according to the protocol type, the terminal information interaction analysis table is prestored in an internal RAM area near the aggregation station, and the terminal information interaction analysis table is used for analyzing uplink and downlink messages.
The state information comprises an abnormal state of the load control terminal, a communication link state and a functional pressing plate state; the data information comprises the load line active power and the actual cutting power which are acquired and calculated by the load control terminal.
Referring to fig. 4, the analyzing the status information and the data information sent by the load control terminal, generating a terminal information element includes:
and extracting state information and data information from the data uploaded by the load control terminal according to the terminal information interaction analysis table, and filling the extracted state information and data information into terminal information elements.
As an example of this embodiment, the generated terminal information element is in a linear linked list format, and is stored in the memory data area, and after each time the information message of the terminal port is received, the information element is immediately parsed, extracted and refreshed into the corresponding information element linked list.
Referring to fig. 5, the terminal information element is sent up by a wheel-change sending mode, and the terminal information element of the load control terminal is sent up at a time; the nearby sink station adopts frame number to identify the identity of the load control terminal according to the communication protocol with the upper control station.
Specifically, referring to fig. 6, the step S3 includes:
after receiving the command message of the upper control station, the nearby aggregation station analyzes the load cutting command to the terminal according to the standard specification defined by the upper control station, generates the load cutting command message of the corresponding terminal according to the corresponding terminal information interaction analysis table, and immediately transmits the load cutting command message to the corresponding terminal port, and the upper control station command analysis and the terminal command generation are deployed in high-frequency interrupt operation.
The nearby collection station is deployed at a 110kV voltage class transformer substation or a park substation on the power grid side, and the load control terminal is deployed at a 10kV large subscriber station, a 10kV ring main unit or a 380V subscriber side.
In an application example, taking a regional power grid millisecond-level accurate load shedding system as an example, the following description is made:
and constructing a millisecond-level network load intelligent interaction system in a regional power grid, accessing a 10kV power distribution switch at the power grid side, and commonly constructing a load control resource which can be interrupted at the millisecond level of about 10 kilowatts. The accurate control according to the power shortage as much as possible after the direct current fault is realized, and the frequency stability level of the power grid during the ultra-high voltage direct current high-power transmission is improved.
And arranging superior load control substations at 10 220kV substations, arranging nearby collecting stations at 30 load sides nearby 110kV substations, and selectively arranging control terminals in 115 grid-side ring main units according to load control targets and 10kV branch line load conditions. The control terminal adopts an optical communication interface and is deployed in the power grid side ring main unit to realize communication with the nearby aggregation station. The current and voltage of the access branch line realize the tripping function of the access branch line, and collect the power of the controllable load in real time and send the power to the nearby collecting station. The nearby sink station communicates with the upper level load control substation via a transmission network.
Fig. 7 is a diagram of a millisecond level fine cut load control system architecture, shown according to an application example. The nearby sink station processes the information interaction of the load control terminal by adopting the application example: according to the receiving port number and the Label identification sent by the terminal, automatically matching the terminal identity to generate a terminal information interaction analysis table; according to the terminal information interaction analysis table, analyzing the state information and the data information sent by the terminal to generate a terminal information element of the upper control station; according to the standard protocol of the upper-level station, polling terminal information elements and sending terminal information to the upper-level control station at fixed intervals; and analyzing command information issued by the superior control station, directly generating and transmitting terminal command messages to each port according to the terminal information interaction analysis table.
For example, the nearby sink station may implement the method steps of the above embodiments based on an embedded device, the device comprising a processor, further comprising one or more processors, and memory resources represented by the memory, for storing instructions executable by the processor, such as an application.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (5)
1. The method is applied to any one of a plurality of nearby information collecting stations of a millisecond-level accurate load shedding control system, each nearby information collecting station is respectively in communication connection with an upper control station and a plurality of load control terminals through corresponding ports, and each port is provided with a unique number; the upper control station is a load control master station or a load control substation;
the method comprises the following steps:
the nearby collecting station automatically matches the identity of the load control terminal according to the number of the receiving port and the Label identifier sent by the load control terminal, and obtains a terminal information interaction analysis table corresponding to the identity of the load control terminal; the Label identification comprises a load control terminal number and a protocol type, whether the load control terminal is a load control terminal which is required to be accessed by a receiving port or not is identified according to the load control terminal number and the receiving port number, and a terminal information interaction analysis table is matched according to the protocol type, the terminal information interaction analysis table is prestored in an internal RAM area near the aggregation station, and the terminal information interaction analysis table is used for analyzing uplink and downlink messages;
the nearby aggregation station analyzes the state information and the data information sent by the load control terminal according to the terminal information interaction analysis table to generate terminal information elements, and sends the terminal information elements to the upper control station according to a communication protocol with the upper control station at preset intervals; the state information comprises an abnormal state, a communication link state and a functional pressing plate state of the load control terminal; the data information comprises load line active power acquired and calculated by a load control terminal and actual cutting power; the uploading of the terminal information elements adopts a wheel replacement uploading mode, and the terminal information elements of one load control terminal are uploaded at a time; the nearby aggregation station adopts a frame number to identify the identity of the load control terminal according to the communication protocol with the upper control station;
the nearby aggregation station analyzes command information issued by the upper control station according to a communication protocol with the upper control station, generates terminal command messages of all ports according to the command information and the terminal information interaction analysis table, and sends the terminal command messages to a plurality of load control terminals for communication through all ports.
2. The method according to claim 1, wherein the communication ports between the nearby aggregation stations and the plurality of load control terminals use ethernet communication interfaces, each nearby aggregation station is provided with 8 point-to-point optical fiber communication ports with the load control terminals, and the nearby aggregation station device supports multistage cascading, so as to meet the requirement of simultaneously connecting more than 8 load control terminals.
3. The method for information interaction of load control terminals according to claim 1, wherein the communication between the nearby aggregation station and the upper control station adopts 2M dedicated channel communication based on SDH transmission network, and the communication protocol adopts HDLC protocol.
4. The method for information interaction between load control terminals according to claim 1, wherein said parsing status information and data information sent by the load control terminals to generate terminal information elements includes:
and extracting state information and data information from the data uploaded by the load control terminal according to the terminal information interaction analysis table, and filling the extracted state information and data information into terminal information elements.
5. The load control terminal information interaction method according to claim 1, wherein the nearby aggregation station is deployed at a 110kV voltage class transformer substation or a park substation on a power grid side, and the load control terminal is deployed at a 10kV large subscriber station, a 10kV ring main unit or a 380V subscriber side.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013137580A1 (en) * | 2012-03-12 | 2013-09-19 | 엘지전자 주식회사 | Method for transmitting and receiving control information and apparatus for same |
| CN109936144A (en) * | 2017-12-19 | 2019-06-25 | 国网山东省电力公司电力科学研究院 | A kind of intelligent network lotus mutual induction control system and method based on active distribution network |
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| CN109638972B (en) * | 2019-02-01 | 2021-04-30 | 国网江苏省电力有限公司 | Network load interaction control method adaptive to load characteristics, terminal and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013137580A1 (en) * | 2012-03-12 | 2013-09-19 | 엘지전자 주식회사 | Method for transmitting and receiving control information and apparatus for same |
| CN109936144A (en) * | 2017-12-19 | 2019-06-25 | 国网山东省电力公司电力科学研究院 | A kind of intelligent network lotus mutual induction control system and method based on active distribution network |
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