Data communication method and system based on dual-mode power communication system

Abstract

The invention provides a data communication method and system based on a dual-mode power communication system, belongs to the technical field of power communication, and solves the problems of low data acquisition success rate, low reliability and unstable communication in existing power line communication. Based on an HPLC technology and a wireless communication dual-mode communication mode, the functions of data acquisition, active power failure reporting, precise clock synchronization, automatic transformer area identification, phase topology identification, automatic file synchronization, communication performance monitoring, network optimization and the like can be realized, so that the reliability and the stability of dual-mode power data communication are ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of power communication, and in particular to power line communication technology and HPLC technology. Background Art

[0002] HPLC technology is a high-speed power line communication technology. Power line communication technology refers to a communication technology that uses power lines as a communication medium for data transmission. Since power lines are the most popular and widely covered physical media, using power lines to transmit data information is extremely convenient. Without rewiring, all electrical appliances connected to the power lines can be formed into a communication network for information exchange and communication. This method is simple to implement and easy to maintain. It can effectively reduce operating costs and reduce the expenditure on building new communication networks. Therefore, it has become the main communication means for applications such as smart grids, energy management, smart homes, photovoltaic power generation, and electric vehicle charging.

[0003] Power line communication can be divided into narrowband low-speed power line communication, narrowband high-speed power line communication and broadband high-speed power line communication according to the working frequency band. The frequency range of narrowband power line communication is 3kHz to 500kHz. Due to the relatively narrow bandwidth, it can only provide communication services with lower transmission rates, and its anti-interference ability is weak. The success rate of meter reading is difficult to exceed 90%. The working frequency range of broadband high-speed power line communication for power meter reading includes 2.4MHz~5.6MHz, 2MHz~12MHz, 0.7MHz~3MHz, and 1.7MHz~3MHz. It has a relatively wide bandwidth and can provide data transmission rates from hundreds of kbps to several Mbps. The noise of the power line in the high frequency band is relatively weak. Compared with narrowband power line communication, the communication reliability and stability are significantly improved.

[0004] Based on HPLC technology and wireless communication technology, it can realize functions such as high-frequency data collection in power communication, active reporting of power outages, precise clock management, phase topology recognition, automatic identification of substations, unified ID management, automatic file synchronization, communication performance monitoring and network optimization. Summary of the invention

[0005] In view of the defects existing in the above-mentioned prior art, the present invention provides a data communication method and system based on a dual-mode power communication system, which can ensure the reliability and stability of the dual-mode power data communication.

[0006] The invention provides a data communication method of a dual-mode electric power communication system. The master station communicates with a concentrator through HPLC and wireless communication dual-mode mode, sends a meter reading related task command to the concentrator, and receives the meter reading data reported by the concentrator; the concentrator communicates with a CCO module through HPLC and wireless communication dual-mode mode, sends multiple meter reading frames or retransmission frames to the CCO module, receives the meter reading data reported by the CCO, so as to realize concurrent meter reading; the CCO module communicates with a STA module through HPLC and wireless communication dual-mode mode, sends a concurrent meter reading command to the STA module, receives a meter reading response frame sent by the STA module, reports successful meter reading data to the concentrator, and realizes a concurrent meter reading function; the STA module communicates with an electric meter through HPLC and wireless communication dual-mode mode, receives the HPLC or wireless communication application layer protocol of the CCO module and performs analysis, sends meter reading instructions to multiple electric meters respectively, receives the meter reading data transmitted by the electric meter and transmits it to the CCO module; the electric meter communicates with the electric meter through HPLC and wireless communication dual-mode mode, and transmits the meter reading data to the STA module.

[0007] The method can also realize active reporting of power outages. The STA module and the communication module of the electric meter judge the power outage and restoration event of the power supply through the change of the power zero-crossing signal, and report the power outage and restoration event to the CCO module through HPLC or wireless communication dual-mode. The CCO module reports the power outage and restoration event to the concentrator. The concentrator receives the reported power outage and restoration event information, and generates local meter power outage and restoration information or substation power outage and restoration information in combination with the power outage and restoration information generated by the exchange module, and reports the information to the main station. The main station analyzes the power outage and restoration information and initiates a power supply emergency repair work order. The electric meter and the STA module are equipped with a backup power supply to ensure the smooth reporting of the power outage event when the power is cut off.

[0008] The method can also realize accurate clock management. A clock broadcast synchronization operation is performed in the entire substation every day to synchronize the clocks of each meter to the local clock of the concentrator. When the master station communicates with the concentrator on a daily basis, the error between the concentrator clock and the master station clock is evaluated. If a deviation occurs, the time is adjusted to ensure the clock synchronization of the concentrator and the master station. The CCO module sends a broadcast time adjustment command. The STA module broadcasts and forwards the broadcast time adjustment command to the downstream meter to synchronize the meter clock with the concentrator. The concentrator clock is compared with the meter clock. If it exceeds the specified value, the STA module reports the relevant clock deviation event. The CCO module receives the clock deviation event sent by the STA, generates a relevant event and reports it to the concentrator. The concentrator forwards the clock deviation event to the master station, and the master station processes the deviation clock. The concentrator periodically collects the clock information of the downstream meter, compares it with its own clock information, and immediately reports to the master station if a deviation occurs.

[0009] The method can also realize automatic identification of substations. The CCO module sends a substation feature collection start message to the STA module. The collection features include power frequency period, power frequency voltage, and power frequency. The CCO module configures collection parameters. The collection parameters include collection period and collection method. The STA module collects and stores data according to the collection parameters sent by the CCO module. The CCO module collects data according to the configured collection parameters. The CCO sends a substation feature information notification message to the STA module. The STA module obtains relevant substation data through the substation feature information notification message sent by the CCO module, and then calculates to obtain its own substation affiliation result. The CCO module sends a substation judgment result query command to poll and read the substation identification result of the STA module.

[0010] This method can also realize unified ID identification management. Each chip of HPLC has unique ID information. The meter or STA module reports the ID information to the CCO module through an association request message. The CCO module collects and stores the ID information of all nodes in this area, and provides batch query and single node ID query services to the concentrator. The concentrator provides the ID query service of all nodes in this area to the master station. The master station uniformly manages the binding relationship between the relevant ID information and the meter address, and handles the event of changes in the binding relationship accordingly.

[0011] In this method, the CCO module also communicates directly with the electric meter through HPLC and wireless communication dual-mode.

[0012] This method can also realize automatic synchronization of archives. The concentrator starts the active registration process of the meter at a fixed time every day. The concentrator compares the content reported by the route with the concentrator's own archive, stores the newly added meter information outside the archive, and generates a new meter event to notify the main station.

[0013] The present invention also provides a dual-mode power communication system, including: a master station, a concentrator, a CCO module, a STA module and an electric meter. Through the system, functions such as high-frequency data collection, active reporting of power outages, precise clock management, phase topology identification, automatic identification of substations, unified ID identification management, automatic file synchronization, communication performance monitoring and network optimization can be realized.

[0014] The present invention also provides a dual-mode power communication system, which includes a processor and a memory. The processor implements functions such as high-frequency data collection, active reporting of power outages, precise clock management, phase topology identification, automatic identification of substations, unified ID management, automatic file synchronization, communication performance monitoring, and network optimization by executing computer instructions in the memory.

[0015] The present invention is based on HPLC technology and wireless dual-mode communication, and can realize functions such as high-frequency data collection, active reporting of power outages, precise clock management, phase topology identification, automatic identification of substations, unified ID management, automatic file synchronization, communication performance monitoring and network optimization to ensure the reliability and stability of dual-mode power data communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Data collection interaction process based on dual-mode power communication system using high-frequency data communication.

[0017] Figure 2 The process of proactively reporting power outages to related businesses.

[0018] Figure 3 Phase identification interaction flow chart.

[0019] Figure 4 Interaction flow chart of automatic identification of substations.

[0020] Figure 5 ID unified identification management structure diagram. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clear, optional embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] Embodiment 1.

[0023] The present invention provides a data communication method based on a dual-mode power communication system, and the dual-mode power communication system includes: a master station, a concentrator, a CCO module, a STA module, and an electric meter. The master station communicates with the concentrator block through HPLC and wireless communication dual-mode mode, sends meter reading related task commands to the concentrator, and receives meter reading data reported by the concentrator. The concentrator communicates with the CCO module through HPLC and wireless communication dual-mode mode, sends multiple meter reading frames or retransmission frames to the CCO module, receives the meter reading data reported by the CCO, so as to realize concurrent meter reading. The CCO module communicates with the STA module through HPLC and wireless communication dual-mode mode, sends concurrent meter reading commands to the STA module, receives the meter reading response frame sent by the STA module, reports successful meter reading data to the concentrator, and realizes the concurrent meter reading function. The STA module communicates with the electric meter through HPLC and wireless communication dual-mode mode, receives the HPLC or wireless communication application layer protocol of the CCO module, and performs parsing, sends meter reading instructions to multiple electric meters respectively, and transmits the meter reading data transmitted by the electric meter to the CCO module after receiving it. The electric meter communicates with the electric meter through HPLC and wireless communication dual-mode mode to transmit meter reading data to the STA module.

[0024] Figure 1The data acquisition interaction process based on the dual-mode power communication system using high-frequency data communication is demonstrated. As shown in the figure, the concentrator continuously sends multiple AFN=F1-F1 meter reading frames to CCO. When receiving the negative response from CCO, it stops sending meter reading frames to CCO. When the concentrator receives any meter reading response message from CCO (which may be successful or failed), the concentrator should resend a frame message to CCO to keep the number of concurrent messages at the maximum until all meters are read. After the meter reading is completed, CCO will send the reading result to the concentrator through the AFN=F1-F1 uplink frame. If the meter reading is successful, the message contains the returned meter protocol (such as DLT645 or DLT698.45 or other metering protocols). If the meter reading fails, an empty message with a length of 0 is returned. If a Q / GDW 1376.2 message sent by the concentrator contains multiple meter protocol frames, and some meter reading frames fail to read the meter, the CCO will only report the successful meter reading frames.

[0025] If the master station initiates "transparent forwarding" tasks such as fee control during the local concurrent meter reading process, the concentrator should support the high-priority fee control task and immediately send the Q / GDW 1376.2 point-reading command AFN=13-F1 downlink frame. The CCO needs to respond with high priority and return the AFN=13-F1 uplink frame. During the process, the success rate of concurrent frames should be guaranteed as much as possible while ensuring the priority of point-reading. At the same time, the concentrator needs to have a retransmission frame strategy for concurrent failed frames.

[0026] The data communication method of the dual-mode power communication system of this embodiment can realize efficient data collection in a dual-mode manner through a multi-node interaction step.

[0027] Embodiment 2.

[0028] The present invention also provides a data communication method based on a dual-mode power communication system to realize active reporting of power outages. In the method, the STA module and the communication module of the electric meter judge the power outage and restoration event of the power supply through the change of the power zero-crossing signal, and report the power outage and restoration event to the CCO module through HPLC or wireless communication dual-mode mode. The CCO module reports the power outage and restoration event to the concentrator, and the concentrator receives the reported power outage and restoration event information, and generates related local meter power outage and restoration information or substation power outage and restoration information in combination with the power outage and restoration information generated by its exchange module, and reports the information to the main station, which analyzes the power outage and restoration information and initiates related power supply emergency repair work orders, wherein the electric meter and the STA module are equipped with a backup power supply to ensure the smooth reporting of the power outage event when the power is off.

[0029] Figure 2The process of actively reporting related services in the event of a power outage is demonstrated. The communication carrier module of the STA and the meter determines the power outage and restoration events of the power frequency power supply through the changes in the power frequency zero-crossing signal. The carrier slave module transmits the power outage event information to the carrier master node on the concentrator side by broadcasting and the restoration event by unicasting. The carrier master node reports the power outage and restoration event to the concentrator. The concentrator receives the power outage and restoration event information reported by the HPLC local network, and combines the power outage and restoration information of its exchange module to generate relevant local meter power outage and restoration information or substation power outage and restoration information, and reports the information to the master station. The master station analyzes the power outage and restoration information and initiates relevant power supply emergency repair work orders. The meter carrier STA slave node module needs to be equipped with a backup power supply, and the HPLC module with power outage reporting function needs to be equipped with a supercapacitor, which can maintain a communication time of more than 30s in the event of a power outage, thereby ensuring the smooth reporting of power outage events. The perception of power outage events is realized by the communication module. When the meter is out of power, the communication module detects the power outage through the power zero-crossing signal detection circuit; the communication module determines whether the module is unplugged or the meter is out of power based on the STA and GND pins; the module is not reported when it is unplugged, but the meter reports the event when it is out of power; the reporting of phase loss events in the three-phase meter adopts the original full event reporting mechanism; power failure / power on in a short period of time does not repeatedly trigger the reporting event; the meter slave node module where the power outage occurs reports its power outage event by broadcasting; and its power restoration event is reported by unicast after the networking is completed. Other carrier slave nodes will generate new power failure events based on the received power failure and restoration events combined with the power failure and restoration information of this node, and continue to forward them to the master node. Support zero-crossing detection to identify power failure / power restoration events. After receiving the power outage and restoration event from the STA / electricity meter, the CCO completes the subsequent operations of event collection on the local carrier channel. The CCO handles the power outage event as follows: (1) The power outage node broadcasts the report and does not respond with a confirmation reply; (2) The node that is not out of power reports the report in a unicast manner and responds with a confirmation reply. After that, the CCO reports the aggregated power outage event information to the concentrator via the Q / GDW 1376.2 message. The CCO needs to have a "de-duplication" function for the power outage events of the STA / collector, and the default de-duplication time period is 4 minutes. Note: During the "de-duplication" period, if the CCO receives a power outage report from the same node, it will no longer report it repeatedly.

[0030] After the concentrator receives the power outage and restoration event report from the downstream, it needs to conduct a linkage analysis with the power outage and restoration information recorded by the local exchange module, generate relevant local meter power outage and restoration events or power outage and restoration events for the entire area, and complete the report according to the ERC extended event.

[0031] Embodiment three.

[0032] The present invention also provides a data communication method based on a dual-mode electric power communication system to achieve precise clock management. A clock broadcast synchronization operation is performed once a day in the substation area to synchronize the clocks of each meter to the local clock of the concentrator. When the master station communicates with the concentrator on a daily basis, the error between the concentrator clock and the master station clock is evaluated. If a deviation occurs, the time is adjusted to ensure the clock synchronization of the concentrator and the master station. The CCO module sends a broadcast time adjustment command. The STA module broadcasts and forwards the broadcast time adjustment command to the downstream meter to synchronize the meter clock with the concentrator. The concentrator clock is compared with the meter clock. If it exceeds the specified value, the STA module reports the relevant clock deviation event. The CCO module receives the clock deviation event sent by the STA, generates a relevant event and reports it to the concentrator. The concentrator forwards the clock deviation event to the master station, and the master station processes the deviation clock. The concentrator periodically collects the clock information of the downstream meter, compares it with its own clock information, and immediately reports to the master station if a deviation occurs.

[0033] The meter collection communication services related to accurate clock management include the following: Periodic broadcast time synchronization service: Generally, the meter clock broadcast synchronization operation of the entire area is carried out once a day in the area, and the clocks of each meter are synchronized to the local clock of the concentrator. The clocks of the entire network slave nodes are synchronized through HPLC broadcast time synchronization commands; Precise broadcast timing service: It is generally believed that the broadcast communication delay of HPLC can be ignored. However, for areas with much interference in the adjacent areas, deep local network layers, and poor communication quality, the local broadcast communication delay of HPLC may reach several seconds, and it is necessary to use the method of pre-setting the timing time to achieve high-precision broadcast timing. Specific meter point-copy unicast time synchronization service: For some clock out-of-tolerance meters, when the clock error exceeds the allowable range of broadcast time synchronization and cannot be calibrated through broadcast time synchronization, the master station directly calibrates the node clock using real-time point-copying. Meter clock error service: The current clock information of all meters in the substation can be tested periodically, and the concentrator or master station can analyze the clock error and perform single-point calibration for meters with large errors. For substations with relatively large clock error problems, the clock error monitoring function can be added to the carrier STA module. When the clock error between the meter and the concentrator exceeds the tolerance, an event reporting message is actively generated. The concentrator forwards the event to the master station, and the master station finally handles the meter clock with the deviation.

[0034] In the development of the STA module, the contents related to accurate timing include: Response to broadcast timing commands: While broadcasting and forwarding the broadcast timing commands, the command is also forwarded to the downstream meters to synchronize the meter clock with the concentrator, ignoring the delay of broadcast communication.

[0035] Response to precise timing commands: For the broadcast timing commands of the precise timing mechanism, after forwarding the broadcast command, wait until the time stated in the message to forward the downstream meter timing command, achieve precise timing synchronization for the entire network, and shield the broadcast communication delay.

[0036] Execution of clock-related meter reading commands: For various types of meter reading messages, related unicast time calibration and clock information collection services can be executed.

[0037] Monitoring of meter clock errors: Compare the clock of the concentrator with the clock of the electric energy meter. If it exceeds the technical requirements, report the relevant clock deviation event.

[0038] In the development work of the CCO module, the contents related to precise timing include: Execution of broadcast time synchronization command: Process the broadcast command message in 1376.2 and initiate the broadcast time synchronization command in the HPLC standard. Execution of precise time synchronization command: Process the precise time synchronization command message extended in 1376.2 and initiate the HPLC local precise time synchronization command. Processing of meter clock deviation events: Receive meter clock deviation events sent by STA, generate related events and report them to the concentrator.

[0039] In the development of the concentrator, the contents related to precise timing include: Execution of the area broadcast time synchronization task: Generally, the area-wide broadcast time synchronization command is initiated some time after midnight every morning.

[0040] Reporting of clock deviation events of downstream meters: Receive clock deviation events reported by carrier slave nodes in the substation at any time and forward the events to the master station.

[0041] Monitoring of meter clock deviations within the substation: The concentrator can periodically collect clock information from downstream meters and compare it with its own clock information. If deviations occur, it can report to the master station.

[0042] The design functions related to precise timing in the master station design include: Synchronization of the concentrator clock: During daily communication with the concentrator, the error between the concentrator clock and the master station clock is evaluated. Once a deviation occurs, the time is corrected to ensure that the concentrator and master station clocks are synchronized.

[0043] Collection and analysis of meter clock errors in substations: For specific substations with serious clock problems, real-time collection of meter errors can be initiated. The clock information of the meters can be obtained through transparent point copying, and compared with the clock of the master station to screen out meters with excessive clock errors.

[0044] Processing of meter clock error events: Receive meter clock error events reported by the concentrator and initiate subsequent clock point reading and calibration operations for specific meters.

[0045] Embodiment 4.

[0046] The present invention also provides a data communication method based on a dual-mode power communication system to achieve phase topology identification. If the three-phase load of the power supply line is unbalanced, the power supply efficiency of the line and the distribution transformer will be reduced at best. In severe cases, the heavy-load phase will be overloaded, which will cause serious consequences such as burning of a phase conductor, burning of a switch, and even burning of a single phase of the distribution transformer. Through the phase identification function of HPLC technology, the phase and line topology relationship of the three phases A, B, and C can be determined, which is helpful to improve the level of three-phase imbalance and line loss phase management of the distribution network, and is of great significance to improving the reliability of power supply.

[0047] CCO collects and analyzes the phase information of the slave node: CCO obtains the relevant zero-crossing NTB information of the slave node through the relevant zero-crossing NTB information collection command in the HPLC standard, compares it with the local zero-crossing NTB information of CCO, analyzes and identifies the phase information of the slave node, and determines the zero-live wiring status of the slave node. It records the reverse connection of the zero-live wire, and the three-phase slave node can determine the reverse phase sequence and phase failure events. The reverse phase sequence determination of the three-phase meter module can be realized by CCO judging three zero-crossings, and the phase sequence or phase failure status is determined by the existence status and timing relationship of each zero-crossing signal; it can also be realized by one zero-crossing method, by reading the phase sequence and phase failure status information in the electric energy meter, and determining the phase sequence status of the three phases. When CCO reads its three-phase NTB information, it fits and generates three-phase zero-crossing NTB information to respond to the command of CCO.

[0048] The concentrator collects the phase information of the slave nodes in the CCO: the concentrator reads the slave node information for the nodes that have successfully networked with the CCO, including the node phase information; the frame feature field in the slave node reading result report message also has a data field that reflects the phase information of the reporting node and the neutral and live wire connection status.

[0049] The master station collects the phase information of the meters in the concentrator: The master station can obtain the phase information and the neutral and live wire connection status information of the relevant meters in the concentrator through the 1376.1 and 698.45 related commands.

[0050] Collection of communication topology information between slave nodes in the substation area: During the HPLC carrier local network networking process, CCO will automatically record the networking path of each slave node, and gradually form the communication topology relationship between the slave nodes in the substation area. When the networking is completed, the topology relationship is basically stable; after the networking is completed, the concentrator can initiate a network topology query command to CCO, and CCO will respond to the network topology information of all slave nodes, and the concentrator will save the information to the local database; when the master station queries the concentrator for the network topology information of the slave nodes in the substation area, the concentrator reads the data from the local database to organize the message to respond to the master station command.

[0051] Collection of phase information of meters under the collector: The collector communication module can only identify the phase sequence information of the power line connected to the collector, and the phase sequence identification of the downstream electric energy meter is a task that needs to be explored.

[0052] Collection of power supply topology relationship information between meters: The identification of power supply topology relationship between meters is currently in the pre-research stage. The master station can explore the identification of power supply topology relationship between meters through big data.

[0053] Figure 3 The following figure shows the phase identification interaction flow chart. To implement the basic process: CCO sends a zero-crossing NTB acquisition indication message through the HPLC protocol, STA replies with a zero-crossing NTB notification message, and CCO calculates the phase result of each STA. CCO reports the calculated phase result to the concentrator through the Q / GDW 1376.2 protocol. The concentrator reports the phase identification result to the master station through the Q / GDW1376.1 protocol.

[0054] Embodiment five.

[0055] The present invention also provides a data communication method based on a dual-mode power communication system to realize automatic identification of substations. The CCO module sends a substation feature collection start message to the STA module, and the collection features include power frequency cycle, power frequency voltage, and power frequency. The CCO module configures collection parameters, and the collection parameters include the collection cycle and collection method. The STA module collects and stores data according to the collection parameters sent by the CCO module. The CCO module collects data according to the configured collection parameters. The CCO sends a substation feature information notification message to the STA module. The STA module obtains relevant substation data through the substation feature information notification message sent by the CCO module, and then calculates to obtain its own substation attribution result. The CCO module sends a substation judgment result query command to poll and read the substation identification result of the STA module.

[0056] Accurately establishing the relationship between the household and transformer in the substation is the key to ensuring accurate calculation of the line loss in the substation. The use of substation identification technology can identify the working substations of different HPLC networks, thereby improving the accuracy of household-transformer relationship judgment, which is beneficial to the management of substation line losses and improving the economic operation level of the power grid.

[0057] Figure 4 This is the flow chart of the automatic identification interaction of the substation area. Since the communication nodes in the substation area are mixed, in order to ensure the interconnection and identification effect, the following are clarified: (1) CCO identification adopts the power frequency cycle (NTB) mode by default, and at least sends the "power frequency cycle" protocol message. Other identification methods are sent according to the manufacturer's choice; (2) The entire network adopts a distributed process by default, and the STA determines the ownership based on the characteristics of the station area; (3) CCO needs to use a dual-edge mode to be compatible with STAs with different “edge modes” (different manufacturers have different hardware solutions) to ensure that mixed installation is problem-free and to identify wiring problems such as “zero-fire reverse connection”; (4) On the STA side, each manufacturer makes a full set of protocols, that is, all kinds of messages can respond normally, but the identification results are executed according to the solutions of each manufacturer.

[0058] After CCO identification is completed, the substation identification results will be reported to the concentrator through the Q / GDW 1376.2 protocol.

[0059] The concentrator reports the area identification results to the master station via the Q / GDW 1376.1 protocol.

[0060] During the development of STA, the tasks related to station area identification include: In response to the area feature collection start command sent by CCO: STA locally collects the corresponding area features according to the collection feature type, collection frequency, collection cycle start, and number of collection points in the command.

[0061] Execute the area feature collection task: collect the STA local area feature information according to the collection plan specified by the CCO, and save the information for subsequent CCO collection.

[0062] Respond to the area feature query command sent by CCO: After the local area feature collection is completed, when receiving the collection data query command sent by CCO, the successfully collected data will be returned to CCO.

[0063] Respond to the area feature release information sent by CCO: When CCO releases its own area feature information to STA, STA compares the information with its own successfully collected area feature information and forms the correct area affiliation after multiple iterations.

[0064] Reporting the area identification result: When the STA distributed area identification mode is adopted, if the STA has identified the correct area affiliation, it will report the area identification result to the CCO and indicate the correct area identification result.

[0065] Respond to the station area identification result query command: When the STA receives the station area identification result query command sent by the CCO, it needs to organize a response message, which must include the identification completion status and identification result information.

[0066] STA distributed (default mode) CCO sends a start message for the collection of substation characteristics. The collection characteristics default to the power frequency cycle characteristics. Other characteristics can be selected based on the power frequency voltage characteristics, power frequency characteristics, etc. At the same time, parameters such as the collection period and collection method are configured.

[0067] The STA node collects and stores data according to the collection parameters issued by the CCO.

[0068] CCO collects data according to the configured collection parameters and sends it to STA through the area characteristic information notification message. After STA obtains the data from CCO, it calculates and obtains its own area affiliation result.

[0069] CCO sends the station area judgment result query command to poll and read the station area identification result of STA.

[0070] In order to ensure normal business communications during the area identification period (daily frozen reading, fee control issuance, high-frequency collection, event reporting, etc.), STA will not actively leave the network even if it determines that the area identification result is wrong, and report the area identification result information on the current network (CCO notifies the concentrator and the event is reported to the master station).

[0071] STA only forwards the area characteristic information message of the CCO master node that has entered the network, and shall not forward any message from other networks, including all messages at the link layer, network layer, and application layer.

[0072] The related work of the concentrator in the area identification service is as follows: Respond to the area identification enable and disable commands initiated by the master station: When the concentrator receives the area identification enable and disable commands sent by the master station, it first performs the command confirmation work and then controls the CCO related operations.

[0073] Control CCO to start or end the area identification function: After the concentrator receives the area identification enable and disable commands from the master station, it controls CCO to start or end the area identification function.

[0074] Processing of incorrect file information reported by CCO: During the process of enabling the CCO area identification function, if the CCO reports an incorrect area attribution event, the concentrator needs to report this information to the master station and expect the master station to make relevant file corrections.

[0075] The concentrator obtains the area identification list reported by the CCO, stores it, and reports it to the master station via the Q / GDW 1376.2 protocol.

[0076] The relevant work contents of the station area identification in the master station system are as follows: Screening of abnormal substations in household-to-substation relationships: By collecting the features of abnormal success rate and low line loss qualification rate, the problem substations are screened in the database for substation identification services. Generally, the screened substations are a group of adjacent substations.

[0077] Enable the area identification work: For the adjacent problem areas, send a remote command to start the area identification function. This group of areas will perform the area identification service and report the erroneous area files to the main station.

[0078] Processing of area archive error reporting events: The master station should respond to the error archive information reported by the concentrator and correct the archive data in the relevant concentrator.

[0079] The area identification work is closed: when the identification of the area relationship of this group is completed, the area identification function is remotely closed.

[0080] In actual applications, the power load demand changes dynamically, and the dispatching system will make corresponding changes to the power supply relationship of the substation, including power splitting and merging. After the substation is changed, the HPLC application can generate a substation change application event through the HPLC module, and compare the newly added users who apply for network access with the whitelist. When the user who applies for network access is not in the whitelist, a new user event is generated (CCO rejects the list report) and actively reported to the main station (when CCO networking and optimization are not completed, the new user event will no longer be reported). Rapid identification of new users is achieved.

[0081] After the network is established, the master node CCO will organize a rejection list event report message to notify the concentrator for new network access requests that are not rejected by the whitelist. To avoid CCO from frequently reporting rejection list events, the same slave node should only be allowed to report once every six hours (filtered within CCO). The deduplication time is based on the CCO clock interval to control the deduplication cycle of the reporting activity as a whole, and is not calculated based on the event generation time of each table. This function is disabled by default in CCO, and the remote master station needs to send a command to CCO through the concentrator to enable this function. CCO adds a cache mechanism. When CCO generates rejected node information, if 1 minute When no new rejection node information is generated within a minute or the number of cached rejection nodes is equal to the maximum list (32), a rejection node information event message is formed and reported to the concentrator; the rejection node address, if it is STA, is the meter access address, if it is a collector, it is the first meter access address, if the collector accesses the network with the collector address, the information is defined according to the MAC address of the collector accessing the network.

[0082] The concentrator saves the information that the node's network access request is rejected, reports it to the master station via 698.45 or 1376.1, or accepts the master station's query command.

[0083] The main station evaluates this information, determines the scenario for area switching, and initiates subsequent file adjustment operations.

[0084] Embodiment six.

[0085] The present invention also provides a data communication method based on a dual-mode power communication system to achieve unified ID identification management. Each chip of HPLC has unique ID information. The electric meter or STA module reports the ID information to the CCO module through an association request message. The CCO module collects and stores the ID information of all nodes in the substation area, and provides batch query and single node ID query services to the concentrator. The concentrator provides the ID query service of all nodes in the substation area to the main station. The main station uniformly manages the binding relationship between the relevant ID information and the electric meter address, and performs corresponding processing on events in which the binding relationship changes. Figure 5 The ID unified identification management structure diagram is shown.

[0086] Relying on the global unified IoT ID management system, a unified IoT device identity tag is established for HPLC chips, realizing full life cycle management in the chip delivery, inspection, operation and other links. The identity authentication mechanism can prevent the access of illegal devices and ensure the security of the network.

[0087] In order to meet the needs of asset management, equipment testing and on-site operation and maintenance, the appearance of the main equipment and communication module is modified. This includes expanding the nameplate opening window of the main equipment, adding one-dimensional and two-dimensional barcodes to the communication module, and adding relevant technical parameters to the communication module. The HPLC chip ID information is provided by the State Grid Metrology Center. This information is unique. The chip manufacturer writes it into the chip read-only storage space once during the production process, and this information cannot be rewritten.

[0088] STA chip ID reading is generally provided by CCO to the concentrator for access services, and the access information is the slave node ID information recorded during the networking process. During the maintenance process, the STA chip is also required to provide the ID query service of the HPLC carrier channel.

[0089] The unique ID information of the HPLC CCO chip is provided by the State Grid Metrology Center. This information is unique and is written into the chip's read-only storage space once during the production process by the chip manufacturer. This information cannot be rewritten.

[0090] The appearance of the CCO module needs to be labeled with an ID. It is recommended to add a one-dimensional or two-dimensional barcode to identify the communication module ID and related technical parameters to facilitate on-site service.

[0091] During the networking process, the CCO records the chip ID information recorded in the carrier slave node association request message and saves the information in its data storage space.

[0092] CCO receives the chip ID query command sent by the concentrator and can query its own ID information in batches or query the ID information of subordinate slave nodes in the substation area.

[0093] CCO accepts the transparent transmission collection command of the concentrator and can forward the ID reading command to the specified slave node, and the slave node directly replies with its own ID information.

[0094] To meet the module ID asset management, the master station should meet the following functions: The master station periodically (daily) reads the ID numbers of the local communication module, remote module and meter / collector module of the collection terminal; and receives the communication module ID change alarm events reported by the collection terminal.

[0095] Embodiment seven.

[0096] The present invention also provides a data communication method based on a dual-mode electric power communication system to achieve automatic synchronization of archives. The concentrator starts the active registration process of the electric meter at a fixed time every day. The concentrator compares the content reported by the route with the concentrator's own archive, stores the newly added electric meter information outside the archive, and generates a new electric meter event to notify the main station.

[0097] The concentrator starts active registration from the node at a fixed time every day. The concentrator carrier module actively registers the newly added electricity meter information and reports it to the concentrator. The concentrator compares the content reported by the route with the concentrator's own archive, stores the newly added meter information outside the archive, and generates a new meter event to notify the main station. The main station expands the comparative analysis based on the collection system, marketing system's substation archives, synchronized archives, blacklist archives and other analysis functions to generate the substation archive information to be verified.

[0098] Maintenance of substation archives and on-site table replacement, table addition and other services ensure the correctness of archives. It is recommended to adopt a mode combining automatic archive synchronization (table search strategy) + substation identification. That is, routine table search is performed for normal business every day. If the archive changes greatly, such as substation cutting or merging, the master station will start local substation identification; if the archive changes little, the substation identification can be started remotely regularly (such as every two weeks) to ensure the correctness of dynamic maintenance of substation archives.

[0099] The concentrator or concentrator carrier module periodically starts the active registration process of the electric energy meter; the concentrator stores the meter search information after receiving it from the router; the concentrator compares the meter search result with the concentrator's own file, generates "unknown electric energy meter discovery time" for the meter information outside the file, and reports it to the master station.

[0100] After receiving the new meter events reported by the concentrator, the master station will compare them with the marketing system files; the correct files after comparison will be sent to the concentrator; incorrect files require on-site verification of meter information by technical personnel.

[0101] After the master station receives the newly added meter event reported by the concentrator, it synchronizes the marketing system files; the master station organizes the new meter parameters to be sent to the concentrator.

[0102] Embodiment eight.

[0103] The present invention also provides a data communication method based on a dual-mode power communication system to achieve communication performance monitoring and network optimization. Each node has parameters such as signal strength, adjacent node information, and network path information. The status information of each device can be monitored at the master station, and the operation status of devices of different chip manufacturers and module manufacturers can be evaluated. The network operation level can be analyzed by monitoring data, and HPLC performance parameters can be adjusted to continuously optimize the communication network.

[0104] During networking and maintenance, STA reports its own ID information to CCO.

[0105] During the network construction and maintenance process, CCO maintains the current network topology, records the ID information of each node, records the information of the master node of the adjacent domain, and maintains a dynamic current network communication status. CCO responds to the network topology query command, carrier chip ID information query command, and adjacent master node query command sent by the concentrator, and feeds back the current network status to the concentrator through the response of these three types of commands.

[0106] The concentrator responds to network topology query commands, chip ID query commands, master node neighbor information query commands, etc. sent by the master station, and feeds back the local HPLC carrier network status to the master station.

[0107] The master station dynamically displays the network status, can obtain the current network working status, understand the network channel status through analysis, and provide guidance for the operation and maintenance management of the carrier channel.

[0108] In the networking and maintenance work of managing the local network, CCO maintains the real-time dynamic update of the current network topology and chip ID information; updates the status of the surrounding master nodes; and provides the concentrator with access services to the master nodes, network topology, and all node ID information. The CCO module provides nodes with parameters such as signal strength, adjacent node information, and network path information. CCO reports the parameter information to the concentrator through the Q / GDW 1376.2 protocol.

[0109] In the communication performance monitoring and network optimization work, the tasks of the master station include the following: Display of network working status: The current network status is displayed in a graphical way, which can reflect the network topology information, reflect the manufacturer information of each node, mark the information of the adjacent domain master node, and display the communication performance indicators, etc.

[0110] Evaluation and analysis of network communication status: Based on the network communication status and the execution of the collection business, each network communication indicator is evaluated and analyzed, and prompts are given for problem areas. The cause of the problem is analyzed in combination with geographic information and electricity user information, providing guidance for on-site carrier channel operation and maintenance.

[0111] Statistical analysis of manufacturer communication performance: Conduct statistical analysis on the communication performance of carrier modules from various manufacturers to provide quantitative evaluation data for subsequent bidding and procurement activities.

[0112] The present invention also provides a dual-mode electric power communication system, which implements the method in any of the above embodiments through a master station, a concentrator, a CCO module, a STA module and an electric meter.

[0113] It should be noted that the computer-readable medium disclosed above may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, device or device. In the present disclosure, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, in which a computer-readable program code is carried. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. Computer readable signal media may also be any computer readable medium other than computer readable storage media, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (radio frequency), etc., or any suitable combination of the above.

[0114] The computer-readable medium may be included in the electronic device, or may exist independently without being incorporated into the electronic device.

[0115] Computer program code for performing operations of the present disclosure may be written in one or more programming languages, or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server; in the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0116] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present disclosure. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some implementations as replacements, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0117] The units involved in the embodiments described in the present disclosure may be implemented by software or hardware, wherein the name of a unit does not, in some cases, limit the unit itself.

[0118] The above introduces the preferred embodiments of the present invention, which is intended to make the spirit of the present invention clearer and easier to understand, but is not intended to limit the present invention. All modifications, substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection outlined by the claims attached to the present invention.

Claims

1. A data communication method based on a dual-mode power communication system, characterized in that: The method is applied to a dual-mode power communication system, which includes: a master station, a concentrator, a CCO module, a STA module, and an electric meter; The master station communicates with the concentrator via remote wireless, sends meter reading-related task commands to the concentrator, and receives meter reading data reported by the concentrator; The concentrator communicates with the CCO module through the serial port, sends multiple meter reading frames or retransmits frames to the CCO module, and receives meter reading data reported by the CCO to achieve concurrent meter reading; The CCO module communicates with the STA module through HPLC and wireless communication dual-mode, sends concurrent meter reading commands to the STA module, receives meter reading response frames sent by the STA module, and reports successful meter reading data to the concentrator to realize concurrent meter reading function; The STA module communicates with the electric meter through the serial port, receives the HPLC or wireless communication application layer protocol from the CCO module, parses it, sends a meter reading instruction to the electric meter, receives the meter reading data from the electric meter and transmits it to the CCO module.

2. The data communication method based on the dual-mode power communication system according to claim 1, characterized in that: Active reporting of power outages can also be achieved. The STA module and the communication module of the electric meter determine the power outage and restoration event of the power supply through the change of the power zero-crossing signal, and report the power outage and restoration event to the CCO module through HPLC or wireless communication dual-mode. The CCO module reports the power outage and restoration event to the concentrator. The concentrator receives the reported power outage and restoration event information, and combines the power outage and restoration information generated by the exchange module, the local meter power outage and restoration information or the substation power outage and restoration information, and reports the information to the main station. The main station analyzes the power outage and restoration information and initiates a power supply emergency repair work order. The electric meter and STA module are equipped with a backup power supply to ensure the smooth reporting of the power outage event in the event of a power outage.

3. The data communication method based on the dual-mode power communication system according to claim 1, characterized in that: It can also achieve precise clock management. A clock broadcast synchronization operation is performed in the entire substation every day to synchronize the clocks of each meter to the local clock of the concentrator. When the master station communicates with the concentrator on a daily basis, the error between the concentrator clock and the master station clock is evaluated. If a deviation occurs, the time is adjusted to ensure the clock synchronization of the concentrator and the master station. The CCO module sends a broadcast time adjustment command. The STA module broadcasts and forwards the broadcast time adjustment command to the downstream meter to synchronize the meter clock with the concentrator. The concentrator clock is compared with the meter clock. If it exceeds the specified value, the STA module reports a clock deviation event. The CCO module receives the clock deviation event sent by the STA, generates related events and reports them to the concentrator. The concentrator forwards the clock deviation event to the master station, and the master station processes the deviation clock. The concentrator periodically collects the clock information of the downstream electricity meter, compares it with its own clock information, and immediately reports any deviation to the master station.

4. The data communication method based on the dual-mode power communication system according to claim 1, characterized in that: It can also realize automatic identification of substations. The CCO module sends a substation feature collection start message to the STA module. The collection features include power frequency cycle, power frequency voltage, and power frequency. The CCO module configures the collection parameters. The collection parameters include the collection cycle and collection method. The STA module collects and stores data according to the collection parameters sent by the CCO module. The CCO module collects data according to the configured collection parameters. The CCO sends the substation feature information notification message to the STA module. The STA module obtains the relevant substation data through the substation feature information notification message sent by the CCO module, and then calculates to obtain its own substation affiliation result. The CCO module sends an substation judgment result query command to poll and read the substation identification result of the STA module.

5. The data communication method based on the dual-mode power communication system according to claim 1, characterized in that: Unified ID identification management can also be achieved. Each HPLC chip has unique ID information. The meter or STA module reports the ID information to the CCO module through an association request message. The CCO module collects and stores the ID information of all nodes in this area, and provides batch query and single-node ID query services to the concentrator. The concentrator provides the ID query service of all nodes in this area to the master station. The master station uniformly manages the binding relationship between the relevant ID information and the meter address, and handles the events of changes in the binding relationship accordingly.

6. The data communication method based on the dual-mode power communication system according to claim 1, characterized in that: The CCO module also communicates directly with the meter via dual-mode HPLC and wireless communication.

7. The data communication method based on the dual-mode power communication system according to claim 1, characterized in that: It can also realize automatic synchronization of archives. The concentrator starts the active registration process of the meter at a fixed time every day. The concentrator compares the content reported by the route with the concentrator's own archive, stores the newly added meter information outside the archive, and generates a new meter event to notify the main station.

8. A dual-mode power communication system, characterized in that: The dual-mode power communication system implements the method according to any one of claims 1 to 7 through a master station, a concentrator, a CCO module, a STA module and an electric meter.

9. A dual-mode power communication system, characterized in that: The system comprises a processor and a memory, and the processor implements the method of claims 1-7 by executing computer instructions in the memory.

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