CN115499943A - Power grid distributed communication implementation method and device - Google Patents
Power grid distributed communication implementation method and device Download PDFInfo
- Publication number
- CN115499943A CN115499943A CN202210948166.0A CN202210948166A CN115499943A CN 115499943 A CN115499943 A CN 115499943A CN 202210948166 A CN202210948166 A CN 202210948166A CN 115499943 A CN115499943 A CN 115499943A
- Authority
- CN
- China
- Prior art keywords
- fault
- distribution terminal
- power distribution
- information
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004891 communication Methods 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000003993 interaction Effects 0.000 claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 230000008859 change Effects 0.000 claims description 16
- 230000002452 interceptive effect Effects 0.000 claims description 16
- 238000002955 isolation Methods 0.000 claims description 15
- 230000011664 signaling Effects 0.000 claims description 15
- 230000009471 action Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000001960 triggered effect Effects 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 231100000136 action limit Toxicity 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
-
- 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
-
- 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
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/20—Arrangements in telecontrol or telemetry systems using a distributed architecture
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2209/00—Arrangements in telecontrol or telemetry systems
- H04Q2209/40—Arrangements in telecontrol or telemetry systems using a wireless architecture
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention belongs to the field of electric power, and particularly relates to a method and a device for realizing distributed communication of a power grid. The method comprises the steps of establishing transverse wireless communication between the power distribution terminal devices based on an auto-negotiation mode; and establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid. The function of distributed communication can be realized by establishing transverse wireless communication between the power distribution terminal devices based on an auto-negotiation mode; the method comprises the steps of establishing an information interaction mechanism and a corresponding interaction information point table according to an IEC101/104 protocol, realizing the interaction mechanism of the intelligent distributed function of adaptive power distribution terminal equipment, formulating the interaction information point table among power distribution terminal equipment devices, and realizing the intelligent distributed function according to the improved interaction information among the power distribution terminal equipment devices.
Description
Technical Field
The invention belongs to the field of electric power, and particularly relates to a method and a device for realizing distributed communication of a power grid.
Background
The power grid is an important link for ensuring social operation, so that the importance of ensuring that the power grid can normally complete power transmission is important. The self-healing of the power distribution network is realized by coordinating power distribution equipment and lines, and the redistribution of electric power is realized.
At present, the most common self-healing system of the power distribution network is a centralized grid structure, and the distribution network gradually transits to the distributed grid structure along with the popularization of intellectualization and the infiltration of a distributed power supply, an energy storage system and a micro-grid. The original control mode is also changed from a centralized control mode and a local control mode to an intelligent distributed control mode.
The traditional local control mode is mainly characterized in that the control mode is realized by only depending on the mutual cooperation between the recloser and the sectionalizer without depending on communication equipment and a computer system, has low automation degree, but cannot process the current increasingly complex grid structure. Unlike local control, centralized control relies on a communications network, requiring feeder termination units and associated computer systems. When the distribution network normally operates, the operation condition of the whole distribution network can be monitored, and the original operation mode of the distribution network can be changed in a remote control mode; in addition, the main function is to find out the distribution network fault in time, only the main station needs to be relied on to send instructions to subordinate stations, the transmission time is slow, the network structure is more and more complicated along with the development of the distribution network, and the requirement on the main station is higher.
The intelligent distributed feeder automation technology with the best development prospect at the present stage depends on a peer-to-peer communication network, the novel intelligent station terminal is intelligentized, the intelligent station terminal is matched with the peer-to-peer communication network to complete fault identification and positioning, control commands are sent on the spot and do not need to be uploaded to a main station, fault isolation and power supply recovery are realized, the whole fault self-healing process does not need manual processing and is completed fully automatically, the power failure time and the power failure range caused by the fault are reduced to the maximum extent, and the fault processing time is shortened to the second level from the original hours.
Disclosure of Invention
In order to solve or improve the above problems, the present invention provides a method and an apparatus for implementing power grid distributed communication, and the specific technical scheme is as follows:
the invention provides a power grid distributed communication implementation method, which comprises the following steps: establishing transverse wireless communication between power distribution terminal equipment based on an auto-negotiation mode; and establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid.
Preferably, the power distribution terminal equipment is provided with a wireless communication module with a transverse interconnection function; correspondingly, the establishing of the transverse wireless communication between the power distribution terminal devices based on the auto-negotiation mode includes: the wireless communication module establishes different server sides and client sides according to the actual topology of the power grid, and establishes interactive tunnels between the wireless communication modules through different ports.
Preferably, the establishing of the information interaction mechanism and the corresponding interaction information point table according to the IEC101/104 protocol includes: on the basis of the IEC101/104 protocol, establishing an information interaction mechanism and a corresponding interaction information point table according to the signal delay parameter corresponding to the transverse wireless communication, wherein the information interaction mechanism comprises: change remote signaling and change telemetry uploading mechanisms, link timeout retransmission mechanisms and link reestablishment mechanisms.
Preferably, the remote signaling information interacted between the power distribution terminal devices includes: node fault information, fault isolation success information, switch bounce rejection information and overcurrent lockout information; the telemetering information interacted between the power distribution terminal devices comprises the following steps: and the residual capacity of the power point switch and the load before the fault of the fault isolating switch.
Preferably, after the power distribution terminal device detects a short-circuit fault or a ground fault, a corresponding node fault action signal is triggered and transmitted to the adjacent power distribution terminal device through the interactive tunnel in a manner of changing remote signaling; and the power distribution terminal equipment carries out accurate fault positioning according to the collected related fault signals sent by the adjacent power distribution terminal equipment.
Preferably, the method further comprises the following steps: determining a fault point corresponding to the fault power distribution terminal equipment according to the node fault signal; the downstream switch of the fault point transmits the load at a specific moment before the fault to the adjacent power distribution terminal equipment through an interactive tunnel in a variable telemetry mode according to a real-time load calculation method; adjacent and non-failed distribution terminal equipment downstream of the fault point communicates the received load of the fault isolation switch before the fault.
Preferably, the method further comprises: the interconnection switch receives the load of the fault isolating switch transmitted by the upstream non-fault power distribution terminal equipment before the fault, and the judgment is carried out by a fault recovery algorithm: if the overload is not recovered, the contact switch is switched on to recover the power supply in the non-fault section; if the overload is recovered, the switch is not switched on, and an overload recovery signal is sent.
Preferably, the method is applied to a power distribution network provided with a power distribution network automation master station, and further comprises: and each power distribution terminal device reports the fault processing process and the distributed action information to a distribution network automation main station through an independent interactive tunnel.
The invention provides a power grid distributed communication implementation device, which comprises: the device comprises a first unit, a second unit and a third unit, wherein the first unit is used for establishing transverse wireless communication between power distribution terminal equipment based on an auto-negotiation mode; and the second unit is used for establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid.
The invention has the beneficial effects that: the function of distributed communication can be realized by establishing transverse wireless communication between the power distribution terminal devices based on an auto-negotiation mode; the method comprises the steps of establishing an information interaction mechanism and a corresponding interaction information point table according to an IEC101/104 protocol, realizing the interaction mechanism of the intelligent distributed function of adaptive power distribution terminal equipment, formulating the interaction information point table among power distribution terminal equipment devices, and realizing the intelligent distributed function according to the improved interaction information among the power distribution terminal equipment devices.
Drawings
Fig. 1 is a schematic diagram of a power grid distributed communication implementation method according to the present invention;
FIG. 2 is a TCP connection diagram and data interaction flow diagram according to the present invention;
fig. 3 is a schematic diagram of a grid distributed communication implementation according to the present invention;
fig. 4 is a system topology according to the present invention.
The reference numerals include:
1-first unit, 2-second unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In order to solve or improve the problems mentioned in the background, a power grid distributed communication implementation method shown in fig. 1 is provided, including: s1, establishing transverse wireless communication between power distribution terminal devices based on an auto-negotiation mode; s2, establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid.
Through an auto-negotiation mode, transverse wireless communication between power distribution terminal equipment of a power grid is realized; the auto-negotiation mode comprises setting corresponding identifications on different power distribution terminal devices, and realizing regular, long-term and irregular interaction among the power distribution terminal devices by setting protocols such as communication butt joint. The transverse direction is defined in that the positions of the distribution terminals in the network are identical or differ only slightly. On the contrary, the power distribution terminal equipment can form the forms of large-scale power distribution terminal equipment, medium-scale power distribution terminal equipment, small-scale power distribution terminal equipment and power utilization terminals according to the power distribution direction, namely, the forms of up-flow and down-flow can be formed.
IEC101/104 is a protocol applicable to power systems. An interaction mechanism between the power distribution terminal devices is established based on IEC101/104, and an information point table of interaction between the power distribution terminal devices is formulated, so that distributed communication between the power distribution terminal devices is realized.
The power distribution terminal equipment is provided with a wireless communication module; correspondingly, the establishing of the transverse wireless communication between the power distribution terminal devices based on the auto-negotiation mode includes: the wireless communication module establishes different server sides and client sides according to the actual topology of the power grid, and establishes interactive tunnels between the wireless communication modules through different ports.
The devices of the distribution network can communicate in a wired manner, but in practice, the wired manner requires a large amount of hardware modification and maintenance costs. Therefore, the wireless communication module is arranged on the power distribution terminal equipment, and the hardware modification cost and the maintenance cost can be reduced.
Different power grids have different equipment setting and operation flows. In order to improve the efficiency of data transmission, different server sides and client sides can be established according to the actual topology of the power grid. Meanwhile, an interactive tunnel between the wireless communication modules is established through different ports of the wireless communication modules.
The establishing of the information interaction mechanism and the corresponding interaction information point table according to the IEC101/104 protocol comprises the following steps: on the basis of the IEC101/104 protocol, establishing an information interaction mechanism and a corresponding interaction information point table according to the signal delay parameter corresponding to the transverse wireless communication, wherein the information interaction mechanism comprises: change remote signaling and change telemetry uploading mechanisms, link timeout retransmission mechanisms and link reestablishment mechanisms.
The wireless communication has a problem in that a signal delay phenomenon may occur due to an environment in which the power distribution terminal device is located and a functional limitation of the wireless communication module itself. The operation stability and safety of the power grid are very important, and therefore, the operation stability and safety of the power grid can be influenced by increasing the self-healing reaction speed. In order to improve the efficiency of signal interaction, appropriate optimization can be performed on the basis of the IEC101/104 protocol, and specifically, an information interaction mechanism and a corresponding interaction information point table can be established according to a signal delay parameter corresponding to the horizontal wireless communication. The information interaction mechanism comprises: change telemetry and transmission mechanism, link timeout retransmission mechanism and link reestablishment mechanism.
In particular, the TCP connection diagram and the data interaction flow diagram shown in fig. 2.
TCP connection diagram: different power distribution terminal devices are divided into a client and a server, the client initiates TCP connection, and the server feeds back ACK (acknowledgement character).
Data interaction flow chart: different power distribution terminal equipment is divided into a slave side and a master side, the slave side changes remote signaling, the master side feeds back an ACK confirmation character, the slave side changes remote sensing, the master side feeds back the ACK confirmation character, the slave side changes remote signaling/remote sensing, the master side does not feed back the ACK confirmation character (namely NO ACK), the slave side initiates a link, and the master side is connected with the link.
The interactive remote signaling information between the power distribution terminal devices comprises the following steps: node fault information, fault isolation success information, switch bounce rejection information and overcurrent lockout information; the telemetering information interacted between the power distribution terminal devices comprises the following steps: and the residual capacity of the power point switch and the load before the fault of the fault isolating switch.
Due to functions and power transmission paths, the power distribution terminal equipment can be divided into different nodes, and corresponding node serial numbers are distributed. Node failure information, namely information of which node serial number has failed; when a certain node of the power distribution network is abnormal, the nodes connected with the periphery can be controlled to be isolated from the abnormal node so as to avoid fault expansion generated by the abnormal node, the process is fault isolation, and a fault isolation success message can be correspondingly formed and used for describing the fault isolation process. The switch rejection is an event related to the power abnormal accident, and correspondingly formed switch rejection information is used for describing the condition of the switch rejection of which node occurs. Overcurrent lockout is also an event associated with an electrical anomaly.
The residual capacity of the power point switch is determined by the maximum load which can be provided by the line at the initial stage of the design of the distribution line, the maximum load is set as a fixed value, and when the line normally runs, the residual capacity of the power point switch is obtained by subtracting the current load from the maximum load of the power point switch.
After the power distribution terminal equipment detects a short-circuit fault or a ground fault, a corresponding node fault action signal is triggered to be transmitted to the adjacent power distribution terminal equipment through the interactive tunnel in a change remote signaling mode, and the power distribution terminal equipment carries out accurate fault positioning according to the collected related fault signals transmitted by the adjacent power distribution terminal equipment.
When a short-circuit fault or a ground fault is detected by one power distribution terminal device, a corresponding node fault action signal is triggered, and particularly, the node fault action signal is transmitted to the adjacent power distribution terminal device through the interactive tunnel.
The structure of the power distribution network is sometimes very complex, and the specific node of the fault cannot be simply determined through the node fault signal. Different interactive tunnels can be different in remote signaling mode, and the power distribution terminal equipment can carry out accurate fault location according to the collected related fault signals sent by the adjacent power distribution terminal equipment in a variable remote signaling mode.
The method further comprises the following steps: determining a fault point corresponding to the fault power distribution terminal equipment according to the node fault signal; the downstream switch of the fault point transmits the load at a specific moment before the fault to the adjacent power distribution terminal equipment through an interactive tunnel in a mode of change remote measurement according to a real-time load calculation method; adjacent and non-failed distribution terminal equipment downstream of the fault point communicates the received load of the fault isolation switch before the fault.
To study the cause of the failure, it is necessary to know what happens when the failure occurs. Therefore, the real-time load calculation method is used for transmitting the load at a specific moment before the fault to the adjacent power distribution terminal equipment in a variable remote measuring mode through an interactive tunnel by using a downstream switch of the fault point (the downstream switch of the fault point is a next-stage switch of the current fault point); and then the received load of the fault isolating switch before the fault is transmitted through the downstream adjacent and non-fault power distribution terminal equipment, so that the data can be transmitted to a proper processing link.
The real-time load calculation method is a combination of a code and a processor dedicated to calculating a load at a specific time.
The method further comprises the following steps: the interconnection switch receives the load of the fault isolating switch transmitted by the upstream non-fault power distribution terminal equipment before the fault, and the judgment is carried out by a fault recovery algorithm: if the overload is not recovered, the contact switch is switched on to recover the power supply in the non-fault section; if the overload is recovered, the switch is not switched on, and an overload recovery signal is sent.
As with the previous embodiment, fault-related information is communicated by upstream non-faulty distribution terminal equipment. The load of the fault isolation switch before the fault is a data set of the load at a specific moment. The fault recovery algorithm is an algorithm for judging according to the load of a fault isolating switch before fault, and the result comprises the following steps: judging whether the overload is recovered or not, and switching on the contact switch to recover the power supply in the non-fault section; if the overload is recovered, the switch is not switched on, and an overload recovery signal is sent. In order to reduce the influence of power failure as much as possible, the two distribution lines are connected through the switch so as to realize the transfer of the load, and the switch for connecting the two distribution lines is the 'interconnection switch'.
The method is suitable for the power distribution network provided with the power distribution network automation main station, and further comprises the following steps: and each power distribution terminal device reports the fault processing process and the distributed action information to the distribution network automation master station through an independent interactive tunnel.
The intelligent distributed communication formed by the embodiment can generate beneficial effects in power distribution self-healing/regulation, and comprises the following steps:
1) In an overhead line, an intelligent distributed feeder automation mode is adopted, so that the fault processing time can be effectively shortened, the reclosing times are reduced, the impact on a system is reduced, and the advantages are obvious compared with those of an on-site recloser mode; the configuration is simple, and the reproducibility and the popularization are strong.
2) The intelligent distributed action fixed value parameters (the action fixed value parameters assign the parameters of actions such as power failure, circuit change, corresponding frequency, duration and the like which can be executed by the electric terminal equipment) are set according to the principle of consistency of the protection action limit values, so that the problem of fixed value matching is avoided.
3) Upgrading is carried out on a switch on the existing primary and secondary fusion complete column, a wireless 4G routing module is added to enable power distribution terminal equipment to have a peer-to-peer communication channel, meanwhile, a power distribution terminal equipment program is upgraded, the intelligent distributed feeder automation function can be supported, investment is increased less, each terminal is still considered to be communicated with other 4 adjacent terminals when data flow (data and device traffic, DT) are calculated, heartbeat message intervals are 5s, and due to the fact that a circuit normally runs under most conditions and only heartbeat messages exist, the flow of the sudden change messages when faults occur can be ignored. The flow rate per month is calculated to be about 1G according to the previous calculation.
In terms of economy, the intelligent distributed FA based on optical fiber communication needs more funds for laying the optical cable at the initial stage, but does not need to pay flow fees any more subsequently; and 4G or 5G communication needs to pay the flow fee to the operator monthly. According to the calculation result of the formula, the flow of each terminal is less than 1G per month, the cost is not more than 7500 yuan when the flow is calculated according to 500 yuan per year and the service life of the optical cable is 15 years, and compared with the cost of laying 5 ten thousand yuan/km of the optical cable, the power distribution terminal equipment has obvious advantage in economy by adopting a wireless network as a communication medium.
4) Under the condition that a 5G wireless network cannot fully cover a distribution line in recent years, a mature 4G network can well realize a slow-acting intelligent distributed function. After the 5G step coverage in the future, the method can be gradually changed into a quick-action processing scheme
The invention provides a device for realizing distributed communication of a power grid, which comprises: the device comprises a first unit 1, a second unit and a third unit, wherein the first unit is used for establishing transverse wireless communication between power distribution terminal equipment based on an auto-negotiation mode; and the second unit 2 is used for establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid.
The power grid distributed communication implementation method provided by the invention can be applied to power grid operation and control, for example, taking a certain system topological diagram shown in fig. 4 as an example, except for a transformer substation A and a transformer substation B, FTUs 1-11 are power distribution terminal equipment devices of breaker switches on a primary and secondary fusion column installed in an overhead line, and the power grid distributed communication implementation method has three protection functions including intelligent distributed protection, voltage and current type feeder automation and conventional protection.
Taking a certain system topology shown in fig. 4 as an example, FTUs 1 to 11 are all configured with the intelligent distributed functions provided by the above embodiments.
When a fault occurs at point F1 in fig. 4, the distribution terminal unit FTU1 detects an overcurrent and sends a "node fault" signal, which is maintained with the overcurrent state. Meanwhile, to ensure reliability, the signal should be maintained for 5s after the failure disappears. According to the fault positioning logic, the FTU1 of the power distribution terminal equipment detects a fault, and all adjacent switches do not detect the fault, and the switch is tripped by the action of the device after the fault trip time limit is set. And if the FTU4 of the power distribution terminal equipment does not detect the fault and receives a node fault change remote signaling signal with one node and only one node on the adjacent side, the device acts to jump the node switch after setting fault tripping time limit. If the switch is switched off by a combined transformer and has no current in the failure time of the switch, triggering a fault isolation success change remote signaling signal, triggering a fault isolation switch load before fault change remote signaling signal according to a load at a specific moment before the fault by a real-time load calculation method, judging the fault isolation switch load before fault sent by a distribution terminal device FTU4 and the power point switch residual capacity sent by a distribution terminal device FTU11 by a fault recovery algorithm through a distribution terminal device FTU6, and if the fault isolation switch load is recovered without overload, communicating the switch to switch on to recover the power supply of a non-fault section; if the overload is recovered, the switch is not switched on, and an overload recovery signal is sent.
When a fault occurs at point F2 in fig. 4, the distribution terminal unit FTU1 detects an overcurrent and sends a "node fault" signal, which is maintained with the overcurrent condition. Meanwhile, to ensure reliability, the signal should be maintained for 5s after the failure disappears. The distribution terminal unit FTU2 detects an overcurrent and sends an "overcurrent lockout" signal, which is maintained with the overcurrent condition. Meanwhile, in order to ensure reliability, the signal should be kept for 5s after the fault disappears, according to the fault positioning logic, the power distribution terminal device FTU1 does not act, and the power distribution terminal device FTU2 acts to trip the switch after setting the fault tripping time limit.
In the embodiments provided in the present application, it should be understood that the division of the unit is only one division of logical functions, and other division manners may be used in actual implementation, for example, multiple units may be combined into one unit, one unit may be split into multiple units, or some features may be omitted.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (9)
1. A power grid distributed communication implementation method is characterized by comprising the following steps:
establishing transverse wireless communication between the power distribution terminal devices based on an auto-negotiation mode;
and establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid.
2. The power grid distributed communication implementation method according to claim 1, wherein the power distribution terminal device is provided with a wireless communication module with a transverse interconnection function;
correspondingly, the establishing of the transverse wireless communication between the power distribution terminal devices based on the auto-negotiation mode includes:
the wireless communication module establishes different server sides and client sides according to the actual topology of the power grid, and establishes interactive tunnels between the wireless communication modules through different ports.
3. The method for implementing power grid distributed communication according to claim 2, wherein the establishing of the information interaction mechanism and the corresponding interaction information point table according to the IEC101/104 protocol includes:
on the basis of the IEC101/104 protocol, an information interaction mechanism and a corresponding interaction information point table are established according to the signal delay parameters corresponding to the transverse wireless communication, wherein,
the information interaction mechanism comprises: change remote signaling and change telemetry uploading mechanisms, link timeout retransmission mechanisms and link reestablishment mechanisms.
4. The method for implementing the power grid distributed communication according to claim 3, wherein the telecommand information interacted between the power distribution terminal devices comprises: node fault information, fault isolation success information, switch bounce rejection information and overcurrent lockout information;
the telemetering information interacted between the power distribution terminal devices comprises the following steps: the residual capacity of a power point switch and the load before the fault of the fault isolating switch.
5. The method for implementing the power grid distributed communication according to claim 4, wherein after the power distribution terminal device detects a short-circuit fault or a ground fault, a corresponding node fault action signal is triggered and transmitted to the adjacent power distribution terminal device through the interaction tunnel in a change remote signaling manner;
and the power distribution terminal equipment carries out accurate fault positioning according to the collected related fault signals sent by the adjacent power distribution terminal equipment.
6. The power grid distributed communication implementation method according to claim 5, further comprising:
determining a fault point corresponding to the fault power distribution terminal equipment according to the node fault signal;
the downstream switch of the fault point transmits the load at a specific moment before the fault to the adjacent power distribution terminal equipment through an interactive tunnel in a mode of change remote measurement according to a real-time load calculation method;
adjacent and non-failed distribution terminal equipment downstream of the fault point communicates the received load of the fault isolation switch before the fault.
7. The method for implementing power grid distributed communication according to claim 6, further comprising:
the interconnection switch receives the load of the fault isolating switch transmitted by the upstream non-fault power distribution terminal equipment before the fault, and the judgment is carried out by a fault recovery algorithm:
if the overload is not recovered, the contact switch is switched on to recover the power supply in the non-fault section;
if the overload is recovered, the switch is not switched on, and an overload recovery signal is sent.
8. The method for implementing grid distributed communication according to claim 7, which is applied to a power distribution network provided with a distribution network automation master station, and further comprises:
and each power distribution terminal device reports the fault processing process and the distributed action information to a distribution network automation main station through an independent interactive tunnel.
9. A power grid distributed communication implementation device is characterized by comprising:
the device comprises a first unit, a second unit and a third unit, wherein the first unit is used for establishing transverse wireless communication between power distribution terminal equipment based on an auto-negotiation mode;
and the second unit is used for establishing an information interaction mechanism and a corresponding interaction information point table according to the IEC101/104 protocol so as to realize the distributed communication of the power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948166.0A CN115499943A (en) | 2022-08-09 | 2022-08-09 | Power grid distributed communication implementation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210948166.0A CN115499943A (en) | 2022-08-09 | 2022-08-09 | Power grid distributed communication implementation method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115499943A true CN115499943A (en) | 2022-12-20 |
Family
ID=84466603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210948166.0A Pending CN115499943A (en) | 2022-08-09 | 2022-08-09 | Power grid distributed communication implementation method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115499943A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559160A (en) * | 2013-11-20 | 2014-02-05 | 国家电网公司 | SG-CIM-standard-based construction method for semantic information interaction interface of intelligent power distribution system |
| CN106911498A (en) * | 2017-02-08 | 2017-06-30 | 湖北省新能恒达电力工程有限公司 | The method of power distribution network distributed terminal intelligent modeling communication |
| CN107069950A (en) * | 2016-12-30 | 2017-08-18 | 国网天津市电力公司 | Automatic identifying method and system of a kind of distribution main website to terminal device |
| CN109617228A (en) * | 2018-11-26 | 2019-04-12 | 国电南瑞科技股份有限公司 | A kind of distribution distribution feed line automatization system |
| CN111711965A (en) * | 2020-08-20 | 2020-09-25 | 南京智汇电力技术有限公司 | Intelligent distributed FA fault positioning method based on wireless communication |
| CN112557789A (en) * | 2020-11-30 | 2021-03-26 | 广东电网有限责任公司 | Self-adaptive distributed intelligent test system for distribution automation terminal |
| CN113131448A (en) * | 2021-03-19 | 2021-07-16 | 郑州电力高等专科学校 | Intelligent distributed feeder line method and device based on 5G communication |
| CN114050655A (en) * | 2021-11-22 | 2022-02-15 | 国网上海市电力公司 | Power distribution network self-healing system and method based on 5G communication technology |
-
2022
- 2022-08-09 CN CN202210948166.0A patent/CN115499943A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103559160A (en) * | 2013-11-20 | 2014-02-05 | 国家电网公司 | SG-CIM-standard-based construction method for semantic information interaction interface of intelligent power distribution system |
| CN107069950A (en) * | 2016-12-30 | 2017-08-18 | 国网天津市电力公司 | Automatic identifying method and system of a kind of distribution main website to terminal device |
| CN106911498A (en) * | 2017-02-08 | 2017-06-30 | 湖北省新能恒达电力工程有限公司 | The method of power distribution network distributed terminal intelligent modeling communication |
| CN109617228A (en) * | 2018-11-26 | 2019-04-12 | 国电南瑞科技股份有限公司 | A kind of distribution distribution feed line automatization system |
| CN111711965A (en) * | 2020-08-20 | 2020-09-25 | 南京智汇电力技术有限公司 | Intelligent distributed FA fault positioning method based on wireless communication |
| CN112557789A (en) * | 2020-11-30 | 2021-03-26 | 广东电网有限责任公司 | Self-adaptive distributed intelligent test system for distribution automation terminal |
| CN113131448A (en) * | 2021-03-19 | 2021-07-16 | 郑州电力高等专科学校 | Intelligent distributed feeder line method and device based on 5G communication |
| CN114050655A (en) * | 2021-11-22 | 2022-02-15 | 国网上海市电力公司 | Power distribution network self-healing system and method based on 5G communication technology |
Non-Patent Citations (1)
| Title |
|---|
| 艾解清;高济;彭艳斌;郑志军;: "基于直推式支持向量机的协商决策模型", 浙江大学学报(工学版), no. 06, 15 June 2012 (2012-06-15) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102270836B (en) | Wide-area over-current protection method and system for power distribution network | |
| CN101409442B (en) | Rapid line backup protection method with reliable selection based on wide area measuring system | |
| CN106711975B (en) | Fault location, isolation based on distributed differential protection and quick recovery method | |
| CN104518564B (en) | Backup automatic switching apparatus with area automatic switching function, and backup automatic switching method | |
| CN101867223A (en) | Automatic system fault handling method of distribution network containing a plurality of distributed power supplies | |
| CN211880175U (en) | Intelligent distributed feeder device based on 5G | |
| CN105140894A (en) | Phase difference principle based power distribution network differential protection method | |
| CN112165090A (en) | Cooperative self-healing system and method | |
| CN102185387A (en) | Triple play method of process layer in intelligent substation | |
| CN104113141A (en) | Intelligent lengthways interconnected feeder line automatic control method | |
| CN211880174U (en) | Self-adaptive differential protection device based on 5G wireless communication | |
| CN102832600A (en) | Regional failure protection method based on power grid topological structure | |
| CN112994246A (en) | Power distribution network feeder automation control method suitable for distributed power supply access | |
| CN113131448A (en) | Intelligent distributed feeder line method and device based on 5G communication | |
| CN110165639B (en) | Method for automatically switching working modes of power distribution terminal | |
| CN104659765A (en) | Channel configuration and protection scheme applied to multi-terminal radiation network of power system | |
| CN102684311A (en) | 10 kilovolt (KV) cascade switching station graded protection device and protection method thereof | |
| CN110518699B (en) | Out-of-step separation control system based on wide area information | |
| CN202550668U (en) | Distributed power distribution network management terminal | |
| CN107611939B (en) | Regional power supply looped network fault quick isolation and load transfer method | |
| CN115499943A (en) | Power grid distributed communication implementation method and device | |
| CN113162234B (en) | Direct current combined-hop system based on GOOSE communication and monitoring method | |
| CN113346462B (en) | Petal type power distribution network contact line protection method based on predicted voltage amplitude | |
| CN202679073U (en) | HP-9000 type switching station fault processing system | |
| CN212258111U (en) | Integrated intelligent ring main unit system and intelligent power distribution network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |