Method for studying, judging and verifying power failure and power recovery of meter box

Abstract

The invention relates to the technical field of power failure and power recovery of meter boxes, in particular to a research, judgment and verification method for power failure and power recovery of a meter box. Comprising the following steps: S1, studying and judging power failure of a meter box; s2, studying and judging electricity recovery of the meter box; s3, verifying the power failure of the meter box; and S4, electricity recovery verification of the meter box is carried out. The main station processes a power failure event reported for the first time to avoid redundant interference, a non-real scene is eliminated by judging the marketing in-transit process, and it is ensured that power failure research and judgment are accurate and reliable in combination with a voltage threshold value and a hierarchical confirmation mechanism; according to the method, a time + data two-dimensional verification mechanism is formed, and for special research and judgment of the distributed photovoltaic meter box, indirect inference can be carried out through a load recovery proportion, and an equipment failure unreported scene is covered; the power failure verification and the power restoration verification respectively form'event triggering-data verification-state confirmation 'closed loop logic, the event authenticity and the actual recovery of the power grid state are guaranteed, and meanwhile, the information storage and push form a complete closed loop, which is beneficial to tracing and cooperative processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of meter box power failure and restoration, in particular to a meter box power failure and restoration research and verification method. BACKGROUND

[0002] Power failure repair is a core business of power supply enterprises. In the traditional mode, when customers, low-voltage areas, and switching stations have power failure, only customers can call 95598 to trigger the repair process. However, repair personnel have no knowledge of the specific power failure point and range before they leave, and they need to spend a lot of time checking the fault point after they arrive at the scene, which greatly reduces the repair efficiency, seriously affects the power supply reliability, and greatly interferes with the normal life and production order of customers. The prior art such as the real-time power failure influence evaluation and response scheme generation method disclosed in Chinese Patent Publication No. CN120235479A has many deficiencies in the power failure and restoration research and verification links. In the power failure research, the handling of repeated reporting events is weak, redundant data interference is serious, and non-real power failure false reports cannot be excluded, and the device reporting information is also over-relied on. The power restoration research lacks secondary verification and fails in special scenarios such as distributed photovoltaic meter boxes. In the power failure and restoration verification, the verification mechanism is imperfect, the verification dimension is single, and it is difficult to accurately confirm the power failure and restoration events and the actual state of the power grid, which needs to be improved. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the deficiencies of the prior art and provide a meter box power failure and restoration research and verification method.

[0004] The technical solution adopted by the present application is as follows: A meter box power failure and restoration research method is applied to the repair of meter box power failure and restoration, comprising the following steps: S1, meter box power failure research: S11, the main station receives the active reporting of the intelligent metering switch or the meter in the meter box; S12, for the same meter box power failure event reported multiple times within 1 hour, the main station only handles the first reported power failure event; S13, the main station determines whether there is a marketing in-transit process for the meter box on the same day, and if so, discards the meter box power failure event; S14, the main station encapsulates the power failure event information of the tapping line, saves the power failure event information to the database, and pushes the meter box power failure information to the external system; S2, meter box power restoration research: S21, the main station marks the meter box under the power failure unit with the reporting of the terminal, intelligent metering switch, and electric energy meter, and when the power restoration time is valid, it determines the meter box power restoration; S22, according to the file researches whether there is distributed photovoltaic under the box, if yes, then the distributed photovoltaic power generation electric energy meter A-phase current is called, if the power generation current is greater than or equal to 0.1A, then the researches that the power after the multifunctional switch is successful; if less than 0.1A, then the standard distributed photovoltaic power generation efficiency is judged; if the household power generation efficiency is 10% lower than the standard compared to the household power generation efficiency, then it is determined that the multifunctional switch after the meter is closed or the customer is closed or the pressure relief switch action is not manually closed; S23, if the power time is invalid and no other power failure event is reported, then the A-phase voltage of the part of the intelligent measurement switch or the electric energy meter under the meter box is called to judge the power recovery; if the A-phase voltage called is not less than 132V, then it is initially confirmed that the power recovery event is established; if there is distributed photovoltaic under the meter box, then the operation S22 is executed; S24, the main station marks the terminal, intelligent measurement switch and meter under the meter box of the power failure unit, and the power recovery alarm event is not reported, but when the user reported by the load under the meter box is more than 30%, the meter box is judged to be powered on; S25, save the power recovery event information and related distributed power generation electric energy meter switch after the meter, inverter closing to the database, and push to the external system.

[0005] In the technical solution, after the main station receives the power failure / power recovery event actively reported by the equipment in the meter box, firstly, only the first report of the same power failure event repeatedly reported within 1 hour is processed to avoid redundant data interference; at the same time, by judging whether there is marketing in the way process in the meter box on the same day, the non-real power failure scene is excluded to ensure the accuracy of the power failure research; after confirming the power failure event, the main station encapsulates the branch power failure information into standardized data, stores it to the database for tracing, and pushes it to the external system to realize the fast sharing and collaborative processing of the power failure information; when the power recovery research is carried out, the main station firstly judges the power recovery authenticity through the power recovery time and the terminal state reported by the equipment; if the power recovery time is invalid or the power recovery event is not reported, then the equipment voltage or current is called for secondary verification, forming a "time + data" two-dimensional verification mechanism; for the meter box containing distributed photovoltaic, the power generation current or the power generation efficiency is called for special research to solve the problem of invalid traditional voltage judgment in the photovoltaic grid-connected scene and improve the adaptability of the power recovery research; when the equipment does not report the power recovery event, but the user reported by the load under the meter box is more than 30%, the main station indirectly infers the power recovery state through the load recovery ratio to cover the special scene of equipment failure not reported, and enhances the robustness of the research; the power recovery event information and the associated equipment state are uniformly stored and pushed to the external system to form a complete closed loop of "research-storing-application".

[0006] In addition, the power recovery research method of the meter box according to the above-mentioned application can also have the following additional technical features: According to an embodiment of the application, the main station of S11 receives the active report of the intelligent measurement switch or the meter in the meter box, which is divided into the following cases: Case one: for a single meter box, the master station receives the power failure event actively reported by the smart metering switch or at least one meter; Case two: for a multi-meter meter box, the master station simultaneously receives the power failure events actively reported by multiple meters in the meter box, and performs data detection on the A-phase voltage of the meter that does not report the power failure event, and determines the power failure according to the detection result.

[0007] In the technical solution, the single meter box relies on a single device to report and trigger the determination, and utilizes the real-time state sensing capability of the device to quickly respond; the multi-meter meter box combines multi-device reporting and active detection, and verifies multiple sources of data to make up for the loopholes of some devices that do not report due to communication failure, fault coverage, etc., and avoids misjudgment or omission.

[0008] According to one embodiment of the present application, in case two of S11, the determination threshold is 132V when the rated voltage of the meter is 220V, and the determination threshold is 60V when the rated voltage of the meter is 100V; the detection result is divided into two types: no return value or voltage value is 0V, or return value is greater than 0V and less than 132V.

[0009] In the technical solution, different power failure determination thresholds are set for meters with different rated voltages, and a classification processing mechanism is combined with the detection result to realize accurate determination of the power failure event of the multi-meter meter box.

[0010] According to one embodiment of the present application, the master station of S13 determines whether the power failure event time of the meter box is valid, and discards the power failure event of the meter box if it is invalid; the master station detects the A-phase voltage of a plurality of communication-optimized meters under the meter box, and preliminarily determines the power failure according to the detection result; the master station reports after a delay of 2 minutes, waits for the power-on event of the device in the meter box, and performs a continuous process according to the waiting result.

[0011] In the technical solution, time validity verification can filter out false power failure events caused by communication delay, device clock desynchronization, etc.; the A-phase voltage of the communication-optimized meter is detected, and multiple device data are used to reduce the influence of single device failure or local failure on the determination; the reporting is delayed to wait for the power-on event of the device, the state change after the device restart is captured through a time window, the transient power failure and the persistent power failure are distinguished, and misjudgment is avoided.

[0012] According to one embodiment of the present application, during the 2-minute delay reporting of the master station of S13, only the power-on event of the device in the same meter box is determined, and if the power-on event of any same device under the meter box is received, the power failure event of the corresponding meter box is discarded.

[0013] In the technical solution, during the main station delay reporting period, the power-on event of the equipment in the same meter box is continuously monitored, the state conversion characteristics from power failure to power recovery of the equipment are utilized, and the time correlation of the power failure-power recovery event is constructed; if the power-on of the equipment is detected within the delay period, it is indicated that the previous power failure event may be a transient fault or false alarm.

[0014] According to one embodiment of the application, the power failure event information of S14 includes the analysis result related to the measuring switch and the electric meter.

[0015] According to one embodiment of the application, in S1 and S2, the judgment method further includes a deduplication rule: if the main station receives the terminal power-on event, the electric meter power-on event, the reported power acquisition data or the electric energy data within 5 minutes, the corresponding deduplication processing is performed.

[0016] In the technical solution, the main station monitors the terminal power-on event, the electric meter power-on event, the power acquisition data or the electric energy data reporting within 5 minutes, when the same event type is detected, only the first reported data is processed, and the subsequent repeated events are directly filtered, forming a closed-loop logic of "event capture-time verification-redundancy elimination".

[0017] In order to achieve the above purpose, the application also provides a verification method for power failure and power recovery of a meter box.

[0018] A verification method for power failure and power recovery of a meter box is provided by meter cross verification, including the following steps: S3, verification of power failure of the meter box: through cross verification of the power failure event of the meter, after the main station receives the power failure event reported by the equipment in the meter box, the following verification is triggered synchronously: for the meter which does not report the power failure event, the A-phase voltage is measured, if the measurement result has no return value or the voltage value is 0V, or the return value is greater than 0V and less than 132V, it is confirmed that the meter power failure is valid; if all meters in the meter box are powered off, it is confirmed that the power failure event of the meter box is valid; S4, verification of power recovery of the meter box: through cross verification of the power recovery event of the meter, after the main station receives the power recovery event reported by the equipment in the meter box, the following verification is triggered synchronously: if the power recovery time of the equipment is valid, the A-phase voltage of all meters in the meter box is measured, if the measurement result has no return value or the voltage value is 0V, or the return value is greater than 0V and less than 132V, it is confirmed that the meter power recovery is invalid; if ≥80% of the meters under the meter box are powered on and the load is recovered to more than 30% of the pre-power failure, it is confirmed that the power recovery of the meter box is valid.

[0019] In the power failure verification stage, the main station takes the power failure event reported by the device as the trigger point, actively measures the A-phase voltage of the unreported meter, judges through the voltage threshold value of "no return value / 0V or 0-132V", combines the hierarchical confirmation mechanism of "partial meter power failure" and "all meter power failure", and avoids misjudgment caused by single device failure or communication problem; in the power recovery verification stage, the main station takes the power recovery event reported by the device as the starting point, first checks the validity of the power recovery time, and then verifies through "all meter voltage detection" and the double-dimension verification of more than 80% meter power recovery and load recovery to more than 30% before power failure, to ensure the authenticity of the power recovery event and the actual recovery of the power grid state, and finally form a closed-loop logic of "event triggering-data checking-state confirmation".

[0020] According to one embodiment of the application, in the S3, when the meter power failure event is cross-verified, the following cases are excluded: the meter reports the power failure event repeatedly within 1 hour; the meter power failure event time is not the same day or the difference with the current time is greater than 1 hour; the meter communication is interrupted but the voltage is normal.

[0021] In the technical solution, after receiving the meter power failure event, the main station first checks whether the event time is the same day and the difference with the current time is less than or equal to 1 hour, to exclude historical or overtime events; secondly, it checks whether the meter communication is interrupted but the voltage is normal (at this time, the power failure event may be a communication false alarm), and if so, it is excluded; finally, it filters the power failure events reported repeatedly within 1 hour.

[0022] According to one embodiment of the application, in the S4, when the meter power recovery event is cross-verified, the device does not report the power recovery event, but the meter or the smart measurement switch reports the power recovery event, so the meter time is used as the reference; if the proportion of the power recovery meter is less than 80% or the load is not recovered, it is confirmed that the local power recovery is effective, and the remaining meter status needs to be checked. The S4 also allows distributed photovoltaic power recovery verification. For the meter associated with the distributed photovoltaic, the generated current is measured: if the current is greater than or equal to 0.1A, it is confirmed that the switch is closed successfully; if the current is less than 0.1A and the power generation efficiency is 10% lower than the standard, it is determined that the closing fails, and an alarm is generated.

[0023] In the technical solution, when the device does not report the power recovery event, the time reported by the meter or the smart measurement switch is used as the priority; if the proportion of the power recovery meter is less than 80% or the load is not recovered, it is determined that the local power recovery is effective and triggers the remaining meter check; for the meter associated with the distributed photovoltaic, the generated current is measured to form a closed-loop logic of "data completion-proportion verification-assisted verification", and the proportion of local power recovery and load recovery degree are used for judgment to quickly identify the un-recovered meter and narrow down the troubleshooting range.

[0024] Compared with the prior art, the application has the following beneficial effects: (1) In the power failure judgment of the present application, the main station processes the first reported power failure event to avoid redundant interference, and also excludes non-real scenarios through judging the marketing in-process, and takes the device report as the trigger point, combines the voltage threshold and the hierarchical confirmation mechanism, effectively avoids the misjudgment caused by single device failure or communication problem, and ensures the accurate and reliable power failure judgment; (2) In the power recovery judgment of the present application, a "time + data" two-dimensional verification mechanism is formed, and for the special judgment of the distributed photovoltaic meter box, it can also indirectly infer through the load recovery ratio, cover the device failure non-reporting scenario, enhance the judgment adaptability, and comprehensively and accurately judge the power recovery state; (3) In the power failure and recovery verification of the present application, the power failure and recovery verification respectively form an "event trigger-data verification-state confirmation" closed loop logic, which guarantees the authenticity of the event and the actual recovery of the power grid state, and at the same time, the information storage and pushing form a complete closed loop, which is beneficial to traceability and collaborative processing. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the process principle block diagram of the present application.

[0026] Figure 2 is the judgment block diagram of the power failure of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0028] Embodiment 1 As shown in Figure 1 and Figure 2 , the present embodiment provides a power failure and recovery judgment method for meter box, which is applied to the repair of power failure and recovery of meter box, and includes the following steps: S1, power failure judgment of meter box: S11, the main station receives the active report of the intelligent metering switch or meter in the meter box; S12, for the same meter box power failure event reported multiple times within 1 hour, the main station only processes the first reported power failure event; S13, the main station judges whether there is a marketing in-process for the meter box on the same day, if there is, the meter box power failure event is discarded; S14, the main station encapsulates the power failure event information of the tapping line, saves the power failure event information to the database, and pushes the meter box power failure information to the external system; S2, power recovery judgment of meter box: S21. When the meter box of the unit marked as being out of power has a corresponding terminal, smart metering switch, and power restoration event on the electricity meter, and the power restoration time is valid, the meter box is determined to be powered back on. S22. Based on the file analysis, determine whether there is distributed photovoltaic power generation under the meter box. If so, measure the A-phase current of the distributed photovoltaic power generation meter. If the power generation current is greater than or equal to 0.1A, determine that the multi-function switch after the power meter has been successfully re-energized. If it is less than 0.1A, determine the standard distributed photovoltaic power generation efficiency. If the household's power generation efficiency is 10% lower than the standard household's power generation efficiency, determine that the multi-function switch after the meter failed to close, or the customer's simulated islanding closing failed, or the undervoltage disconnect switch was activated without manual closing. S23. If the power restoration time is invalid and no other power outage events are reported, then the voltage of the smart meter switches or phase A of the energy meter under the meter box is tested to determine the power restoration status. If the voltage of phase A is not less than 132V, then the power restoration event is preliminarily confirmed. If there is distributed photovoltaic under the meter box, then the S22 operation is executed. S24. If none of the terminals, smart measurement switches, and meters under the meter box of the unit marked as being out of power report a power-back alarm event, but the load reported by users under the meter box exceeds 30%, then the meter box is judged to be powered back on. S25. Save the power restoration event information and the closing status of the related distributed generation power meter switches and inverters to the database, and push them to the external system.

[0029] like Figure 1 and Figure 2 As shown, in this technical solution, after the main station receives the power outage / restoration events actively reported by the devices in the meter box, it first processes only the first report of the same power outage event reported repeatedly within one hour to avoid redundant data interference. Simultaneously, it checks whether there are any marketing processes in progress in the meter box that day to rule out non-genuine power outage scenarios, ensuring the accuracy of power outage assessment. After confirming the validity of the power outage event, the main station encapsulates the branch line power outage information into standardized data, stores it in the database for traceability, and pushes it to external systems to achieve rapid sharing and collaborative processing of power outage information. During power restoration assessment, the main station prioritizes judging the authenticity of the power restoration based on the power restoration time and terminal status reported by the devices. If the power restoration time is invalid or not reported... In the event of a power outage, secondary verification is performed by testing the voltage or current of the equipment, forming a dual-dimensional verification mechanism of "time + data". For meter boxes containing distributed photovoltaics, a special analysis is conducted by testing the power generation current or comparing the power generation efficiency, solving the problem of the failure of traditional voltage judgment in photovoltaic grid-connected scenarios and improving the adaptability of power restoration analysis. When the equipment has not reported a power outage but the load reported by users under the meter box exceeds 30%, the main station indirectly infers the power restoration status by the load recovery ratio, covering special scenarios where equipment failure is not reported, and enhancing the robustness of the analysis. Power restoration event information and the status of related equipment are uniformly stored and pushed to external systems, forming a complete closed loop of "analysis-storage-application".

[0030] In addition, the method for determining the power outage and restoration of the meter box proposed above according to the present invention may also have the following additional technical features: According to one embodiment of the present invention, the main station in step S11 receives active reports from smart measuring switches or meters inside the meter box, which can be categorized as follows: Scenario 1: For a single meter box, the main station receives a power outage event actively reported by the smart metering switch or at least one meter; Scenario 2: For multi-meter boxes, the main station simultaneously receives power outage events actively reported by multiple meters in the box, and performs data sampling to measure the A-phase voltage of meters that have not reported power outage events, and makes a power outage judgment based on the sampling results.

[0031] In this technical solution, a single meter box relies on a single device to report and trigger the judgment, and uses the device's real-time status perception capability to respond quickly; while multi-meter boxes combine multi-device reporting and active testing, and use multi-source data cross-verification to make up for the loopholes that some devices may not report due to communication failures, fault coverage, etc., and avoid misjudgment or omission.

[0032] According to one embodiment of the present invention, in case two of S11, the threshold value is 132V when the rated voltage of the meter is 220V, and the threshold value is 60V when the rated voltage is 100V; the test result is divided into two types: no return value or voltage value is 0V, or return value is greater than 0V and less than 132V.

[0033] In this technical solution, by setting differentiated power outage judgment thresholds for meters with different rated voltages and combining them with a bidding and testing result classification and processing mechanism, accurate judgment of power outage events in multiple meter boxes can be achieved.

[0034] According to one embodiment of the present invention, in step S13, the master station determines whether the time of the power outage event in the meter box is valid. If it is invalid, the power outage event in the meter box is discarded. The master station calls the A-phase voltage of several meters with better communication under the meter box and makes a preliminary determination of power outage based on the call result. The master station reports after a 2-minute delay and waits for the power-on event of the equipment in the meter box. The continuous process is carried out based on the waiting result.

[0035] In this technical solution, time validity verification can filter out false power outage events caused by communication delays, device clock asynchrony, etc.; it can detect the A-phase voltage of the better communication meter and use data from multiple devices to reduce the impact of single device failure or partial failure on the judgment; it can delay the reporting of waiting device power-on events and capture the status changes after the device restarts through a time window to distinguish between instantaneous power outages and continuous power outages, thus avoiding misjudgments.

[0036] According to one embodiment of the present invention, during the 2-minute delay period of the master station reporting in S13, only the power-on events reported by devices within the same meter box are judged. If a power-on event of any identical device under the meter box is received, the corresponding meter box power-off event is discarded.

[0037] In this technical solution, during the delayed reporting period of the main station, the power-on event of the device in the same meter box is continuously monitored. The time correlation of the "power outage-power restoration" event is constructed by utilizing the state transition characteristics of the device from power outage to power restoration. If the device is detected to be powered on during the delay period, it indicates that the previous power outage event may have been a momentary fault or a false alarm.

[0038] According to one embodiment of the present invention, the power outage event information in S14 includes analysis results involving measuring switches and meters.

[0039] According to an embodiment of the present invention, in S1 and S2, the judgment method further includes a deduplication rule: if the main station receives a terminal power-on event, an energy meter power-on event, reported data collection data or energy data within 5 minutes, it performs corresponding deduplication processing.

[0040] In this technical solution, the master station monitors terminal power-on events, electricity meter power-on events, and data collection or electricity data reports within 5 minutes. When the same event type is detected, only the first reported data is processed, and subsequent duplicate events are directly filtered out, forming a closed-loop logic of "event capture - time verification - redundancy removal".

[0041] Example 2 Based on Example 1, such as Figure 1 and Figure 2 As shown, this embodiment provides a verification method for power restoration after a meter box power outage, which involves cross-verification of meters and includes the following steps: S3. Meter Box Power Outage Verification: Through cross-verification of meter power outage events, after the main station receives a power outage event reported by the equipment in the meter box, it synchronously triggers the following verification: For meters that have not reported a power outage event, their A-phase voltage is measured. If the measurement result has no return value or the voltage value is 0V, or the return value is greater than 0V and less than 132V, then the meter power outage is confirmed to be valid; if all meters in the meter box are powered out, then the meter box power outage event is confirmed to be valid. S4. Meter Box Power-On Verification: Through cross-verification of meter power-on events, after the main station receives the power-on event reported by the equipment in the meter box, it synchronously triggers the following verification: If the equipment power-on time is valid, the A-phase voltage of all meters in the meter box is measured. If the measurement result has no return value or the voltage value is 0V, or the return value is greater than 0V and less than 132V, the meter power-on is confirmed to be invalid; if ≥80% of the meters in the meter box are powered on and the load is restored to more than 30% of the level before the power outage, the meter box power-on is confirmed to be valid.

[0042] like Figure 1 and Figure 2As shown, in this technical solution, during the power outage verification phase, the master station uses the power outage event reported by the equipment as the trigger point to actively measure the A-phase voltage of the unreported meters. It judges the voltage threshold of "no return value / 0V or 0-132V" and combines the hierarchical confirmation mechanism of "partial meter power outage" and "all meter power outage" to avoid misjudgment caused by single equipment failure or communication problems. During the power restoration verification phase, the master station uses the power restoration event reported by the equipment as the starting point. It first verifies the validity of the power restoration time, and then verifies the authenticity of the power restoration event and the actual restoration of the power grid status through the dual-dimensional verification of "full meter voltage detection" and ≥80% meter power restoration and load recovery to more than 30% of the pre-outage level. This ultimately forms a closed-loop logic of "event triggering - data verification - status confirmation".

[0043] According to an embodiment of the present invention, in step S3, when cross-validating the power outage event of the meter, the following situations are excluded: the meter repeatedly reports the power outage event within 1 hour; the time of the power outage event of the meter is not on the same day or the time difference with the current time is greater than 1 hour; the meter communication is interrupted but the voltage is normal.

[0044] In this technical solution, after receiving a power outage event from a meter, the master station first verifies whether the event time is on the same day and the time difference from the current time is ≤1 hour, excluding historical or timeout events; secondly, it checks whether the meter communication is interrupted but the voltage is normal (at this time, the power outage event may be a communication false alarm), and if so, it is excluded; finally, it filters out power outage events that are repeatedly reported within 1 hour.

[0045] According to an embodiment of the present invention, in step S4, when cross-verifying the meter power restoration event, if the equipment does not report a power restoration event, but the meter or smart metering switch reports a power restoration event, then the meter time shall be used as the standard; if the proportion of restored meters is less than 80% or the load has not been restored, then the partial power restoration is confirmed to be effective, and the status of the remaining meters needs to be checked. S4 also allows for verification of distributed photovoltaic power restoration by measuring the power generation current of the associated distributed photovoltaic meters: if the current is ≥0.1A, the switch after the meter is confirmed to be successfully closed; if the current is <0.1A and the power generation efficiency is 10% lower than the standard, the closing is determined to be a failure and an alarm is generated.

[0046] In this technical solution, when the equipment does not report a power-back event, the time reported by the meter or smart metering switch is used first. If the power-back meter ratio is less than 80% or the load has not been restored, it is determined to be a partial power-back and the remaining meter verification is triggered. For meters associated with distributed photovoltaic systems, a closed-loop logic of "data completion - ratio verification - auxiliary verification" is formed by measuring the power generation current. By judging the partial power-back ratio and load recovery degree, the meters that have not been restored can be quickly identified, thus narrowing the scope of fault investigation.

[0047] Although the present invention has been described in detail with reference to the accompanying drawings and preferred embodiments, the invention is not limited thereto. Various equivalent modifications or substitutions can be made to the embodiments of the invention by those skilled in the art without departing from the spirit and essence of the invention, and such modifications or substitutions should all be within the scope of the invention. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the invention should also be covered within the protection scope of the invention. Therefore, the protection scope of the invention should be determined by the scope of the claims.

Claims

1. A method for judging the power outage and restoration of a meter box, applied to emergency repairs of power outages and restorations of meter boxes, characterized in that, Includes the following steps: S1. Analysis of power outage in meter box: S11. The main station receives active reports from the intelligent measurement switches or meters inside the meter box. S12. For the same meter box power outage event reported multiple times within 1 hour, the main station will only process the first reported power outage event. S13. The main station determines whether there is a marketing process in progress for the meter box on the same day. If so, the power outage event of the meter box is discarded. S14. The main station encapsulates the power outage event information of the tap changer, saves the power outage event information to the database, and pushes the meter box power outage information to the external system; S2, Meter box power restoration assessment: S21. When the meter box of the unit marked as being out of power has a corresponding terminal, smart metering switch, and power restoration event on the electricity meter, and the power restoration time is valid, the meter box is determined to be powered back on. S22. Based on the file analysis, determine whether there is distributed photovoltaic power generation under the meter box. If so, measure the A-phase current of the distributed photovoltaic power generation meter. If the power generation current is greater than or equal to 0.1A, determine that the multi-function switch after the power meter has been successfully re-energized. If it is less than 0.1A, determine the standard distributed photovoltaic power generation efficiency. If the household's power generation efficiency is 10% lower than the standard household's power generation efficiency, determine that the multi-function switch after the meter failed to close, or the customer's simulated islanding closing failed, or the undervoltage disconnect switch was activated without manual closing. S23. If the power restoration time is invalid and no other power outage events are reported, then the voltage of the smart meter switches or phase A of the energy meter under the meter box is tested to determine the power restoration status. If the voltage of phase A is not less than 132V, then the power restoration event is preliminarily confirmed. If there is distributed photovoltaic under the meter box, then the S22 operation is executed. S24. If none of the terminals, smart measurement switches, and meters under the meter box of the unit marked as being out of power report a power-back alarm event, but the load reported by users under the meter box exceeds 30%, then the meter box is judged to be powered back on. S25. Save the power restoration event information and the closing status of the related distributed generation power meter switches and inverters to the database, and push them to the external system.

2. The method for determining the power outage and restoration of the meter box as described in claim 1, characterized in that, The S11 master station receives active reports from the smart measuring switches or meters inside the meter box, which are categorized as follows: Scenario 1: For a single meter box, the main station receives a power outage event actively reported by the smart metering switch or at least one meter; Scenario 2: For multi-meter boxes, the main station simultaneously receives power outage events actively reported by multiple meters in the box, and performs data sampling to measure the A-phase voltage of meters that have not reported power outage events, and makes a power outage judgment based on the sampling results.

3. The method for determining the power outage and restoration of the meter box as described in claim 2, characterized in that, In case two of S11, the threshold value is 132V when the meter's rated voltage is 220V and 60V when the rated voltage is 100V. The test result is divided into two types: no return value or voltage value is 0V, or return value is greater than 0V and less than 132V.

4. The method for judging the power outage and restoration of the meter box as described in claim 3, characterized in that, The master station in step S13 determines whether the time of the power outage event in the meter box is valid. If it is invalid, the power outage event in the meter box is discarded. The master station calls the A-phase voltage of several meters with better communication under the meter box and makes a preliminary determination of the power outage based on the call results. The master station reports after a 2-minute delay and waits for the power-on event of the equipment in the meter box. The process continues based on the waiting result.

5. The method for judging the power outage and restoration of the meter box as described in claim 4, characterized in that, During the 2-minute delay period of the main station's reporting in S13, only power-on events reported by devices within the same meter box are judged. If a power-on event of any identical device under the meter box is received, the corresponding meter box power-off event is discarded.

6. The method for judging the power outage and restoration of the meter box as described in claim 1, characterized in that, The power outage event information in S14 includes analysis results involving measuring switches and meters.

7. The method for determining the power outage and restoration of the meter box as described in claim 1, characterized in that, In S1 and S2, the judgment method also includes deduplication rules: if the main station receives a terminal power-on event, an electricity meter power-on event, a reported data collection data or electricity data within 5 minutes, it will perform corresponding deduplication processing.

8. A verification method for meter box power outage and restoration, employing the judgment method for meter box power outage and restoration as described in any one of claims 1-7, through meter cross-verification, characterized in that, Includes the following steps: S3. Meter Box Power Outage Verification: Through cross-verification of meter power outage events, after the main station receives a power outage event reported by the equipment in the meter box, it synchronously triggers the following verification: For meters that have not reported a power outage event, their A-phase voltage is measured. If the measurement result has no return value or the voltage value is 0V, or the return value is greater than 0V and less than 132V, then the meter power outage is confirmed to be valid; if all meters in the meter box are powered out, then the meter box power outage event is confirmed to be valid. S4. Meter Box Power-On Verification: Through cross-verification of meter power-on events, after the main station receives the power-on event reported by the equipment in the meter box, it synchronously triggers the following verification: If the equipment power-on time is valid, the A-phase voltage of all meters in the meter box is measured. If the measurement result has no return value or the voltage value is 0V, or the return value is greater than 0V and less than 132V, the meter power-on is confirmed to be invalid; if ≥80% of the meters in the meter box are powered on and the load is restored to more than 30% of the level before the power outage, the meter box power-on is confirmed to be valid.

9. The verification method for power outage and power restoration of the meter box as described in claim 8, characterized in that, In S3, when cross-validating meter power outage events, the following situations are excluded: the meter repeatedly reports a power outage event within 1 hour; the time of the meter power outage event is not on the same day or the time difference with the current time is greater than 1 hour; the meter communication is interrupted but the voltage is normal.

10. The verification method for power outage and power restoration of the meter box as described in claim 8, characterized in that, In S4, when cross-verifying meter power restoration events, if the equipment does not report a power restoration event, but the meter or smart metering switch reports a power restoration event, the meter time shall prevail; if the proportion of restored meters is less than 80% or the load has not been restored, the partial power restoration is confirmed to be effective, and the status of the remaining meters needs to be checked. S4 also allows for verification of distributed photovoltaic power restoration by measuring the power generation current of the associated distributed photovoltaic meters: if the current is ≥0.1A, the switch after the meter is confirmed to be successfully closed; if the current is <0.1A and the power generation efficiency is 10% lower than the standard, the closing is determined to be a failure and an alarm is generated.

Images