A low voltage power failure alarm method

Abstract

The present invention provides a low-voltage power outage and restoration alarm method. By establishing a communication connection between a terminal and a user terminal, the terminal is provided with a routing detection module and an electric energy meter carrier module. During use, the routing detection module performs real-time detection on the input current. When the electric energy meter carrier module detects a power outage or power failure, it sends an alarm message to the terminal. After the terminal receives the alarm message, it first retrieves all active power outage reporting records in the area, analyzes the power outage area in combination with the area topology model, comprehensively develops the problem point where the fault occurs, and feeds back the judgment result to the operation and maintenance personnel. The operation and maintenance personnel can carry out power outage emergency repair in the shortest time and at the fastest speed, thereby reducing the loss caused by the power outage to users and improving the customer's electricity satisfaction.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage power failure alarm, and in particular to a low-voltage power failure and restoration alarm method. Background Art

[0002] The main technical solution for low-voltage power outage alarm is to report power outage events through the collection terminal, that is, the collector uses a backup power circuit to ensure that the collector can still work normally for a period of time after the system power outage, and complete the power outage event reporting. Correspondingly, the concentrator also uses a backup power circuit to complete the collection of events reported by the collector and report to the main station; the general process of the collector power outage reporting: system power outage → collector MCU power outage → backup power circuit supplies power to the collector MCU → detection of power outage event generation, judgment and reporting; the basic principle of the backup power circuit: without a backup power circuit, once the power outage collector stops working immediately, it will not be able to complete the power outage event reporting operation. When the system is powered off, the backup power supply circuit can ensure the normal operation of the collector within a period of time T, and the collector can still send at least one set of data to complete the power outage event reporting. Among them, the length of time T is determined by the charging and discharging characteristics of the backup power supply circuit, and then the appropriate backup power supply circuit is selected according to the time required for the collector power outage reporting operation. The above method has the problem that the power outage reporting can only be used to judge and report the power outage situation in the substation, and it is impossible to report the power outage of the household meter, and thus it is impossible to form visualization under the condition of no power outage in the substation and power outage for the user, resulting in the inability to judge the fault of the household meter power outage and the branch power outage, and it is impossible to notify the customer in time, and the quality of power supply service cannot be guaranteed. Summary of the invention

[0003] In view of this, the object of the present invention is to provide a low voltage power outage and power restoration alarm method to at least solve the above problems.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The first aspect of the present invention provides a low-voltage power outage alarm method, which is applied to a low-voltage power outage alarm system. The system includes a terminal and a user terminal that establish a communication connection. The terminal is provided with a routing detection module and an electric energy meter carrier module. The method includes the following steps:

[0006] S1. Detect the route access to the network through the electric energy meter carrier module;

[0007] S2, synchronously detecting whether the zero-crossing signal of the AC signal routed into the network is lost through the electric energy meter carrier module;

[0008] S3, if it is detected that the zero-crossing signal is lost, the plug-in pin level detection is performed to determine whether there is still a level signal through the plug-in pin level detection;

[0009] S4. If it is determined that there is a problem with the plugging and unplugging of the pins, the module generates a power outage event;

[0010] S5. Determine the nature of the carrier area to determine whether it is a full-carrier area. If it is a full-carrier area, report the power outage event in a bitmap manner. If it is a half-carrier area, report the power outage event in an address manner.

[0011] S6. Collect and monitor power outage events reported by neighboring nodes through the routing carrier module;

[0012] S7, the routing carrier module is used to make a judgment, and the judgment and analysis results are reported to the terminal;

[0013] S8. When the module supercapacitor is exhausted, the analysis and reporting process ends.

[0014] Further, in step S2, the zero-crossing signal detection includes the following steps:

[0015] S21, collecting the level signal of the output of the optocoupler through a programmable logic device, and inverting the collected level signal;

[0016] S22, performing a logical operation of OR and NOT on the level signal and the negated level signal through a programmable logic device to obtain a square wave signal;

[0017] S23, measuring the square wave pulse signal through a programmable logic device;

[0018] S24. The programmable logic device outputs a narrow pulse at half the width of the square wave signal, and the narrow pulse corresponds to the zero-crossing point of the AC signal.

[0019] Furthermore, in step S5, the terminal determines whether it is a full carrier or a half carrier by obtaining the time domain signal waveform of the signal modulation mode when the electric energy meter carrier module is networked and the difference characteristics in modulation and demodulation.

[0020] Furthermore, step S7 also includes the following steps:

[0021] S71. When the analysis result is reported to the terminal, the terminal sends the analysis result to the user terminal and obtains the geographic location signal number of the user terminal.

[0022] Furthermore, step S4 also includes a step of performing a logic screening on the power outage event:

[0023] S41. If a power outage event occurs in the terminal or the electric energy meter, but there is no power-on event for a long time, which is not a pair, it is judged as an abnormal power outage event. If there is a power-on event but no power outage event, it is judged as an abnormal power outage.

[0024] S42: If the power-on time is earlier than the power-off time, and the power-off / power-on time is empty or garbled, it is determined to be an abnormal power-off event;

[0025] S43: If the power outage time is less than the minimum effective interval of the power outage time, or exceeds the maximum effective interval of the power outage time, it is determined to be an abnormal power outage event.

[0026] Furthermore, step S4 also includes a step of performing a logic screening on the power outage event:

[0027] S41. If a power outage event occurs in the terminal or the electric energy meter, but there is no power-on event for a long time, which is not a pair, it is judged as an abnormal power outage event. If there is a power-on event but no power outage event, it is judged as an abnormal power outage.

[0028] S42: If the power-on time is earlier than the power-off time, and the power-off / power-on time is empty or garbled, it is determined to be an abnormal power-off event;

[0029] S43: If the power outage time is less than the minimum effective interval of the power outage time, or exceeds the maximum effective interval of the power outage time, it is determined to be an abnormal power outage event.

[0030] Another aspect of the present invention provides a low-voltage power outage and power restoration alarm system, which is used to execute the method described in the first aspect. The system includes a terminal and a user terminal that establish a communication connection, and the terminal is provided with a routing detection module and an electric energy meter carrier module.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention provides a low-voltage power outage and power restoration alarm method. The technical solution improves the lean level of active power outage and power restoration alarms and fault diagnosis. Each electric meter can report power outage alarm information and carrier routing can monitor, judge and analyze the alarm information. Therefore, the collected low-voltage household meter alarm information has more application value, and intelligent fault diagnosis can be performed through the collection and analysis of the reported information.

[0033] It can also meet the requirements of electricity consumption information collection and metering automation and the power supply bureau on improving service quality. This solution can report power outage events to the metering automation master station in a timely manner, making it convenient for the power supply bureau to arrange staff to handle them in a timely manner, thereby improving service quality, realizing timely reporting and handling of power outage events, strengthening monitoring of the power supply terminal, and improving service quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 The present invention provides a schematic diagram of the overall process of a low-voltage power failure and power restoration alarm method.

[0036] Figure 2 The invention discloses a zero-sequence circuit diagram in a low-voltage power failure and power restoration alarm method. DETAILED DESCRIPTION

[0037] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The enumerated embodiments are only used to explain the present invention but not to limit the scope of the present invention.

[0038] Reference Figure 1 The present invention provides a low-voltage power failure alarm method, which is applied to a low-voltage power failure alarm system. The system includes a terminal and a user terminal that establish a communication connection. The terminal is provided with a routing detection module and an electric energy meter carrier module. The method includes the following steps:

[0039] S1. Detect the route access to the network through the electric energy meter carrier module;

[0040] S2, synchronously detecting whether the zero-crossing signal of the AC signal routed into the network is lost through the electric energy meter carrier module;

[0041] S3, if it is detected that the zero-crossing signal is lost, the plug-in pin level detection is performed to determine whether there is still a level signal through the plug-in pin level detection;

[0042] S4. If it is determined that there is a problem with the plugging and unplugging of the pins, the module generates a power outage event;

[0043] S5. Determine the nature of the carrier area to determine whether it is a full-carrier area. If it is a full-carrier area, report the power outage event in a bitmap manner. If it is a half-carrier area, report the power outage event in an address manner.

[0044] S6. Collect and monitor power outage events reported by neighboring nodes through the routing carrier module;

[0045] S7, the routing carrier module is used to make a judgment, and the judgment and analysis results are reported to the terminal;

[0046] S8. When the module supercapacitor is exhausted, the analysis and reporting process ends.

[0047] Exemplarily, by setting up a terminal and a user terminal that establish a communication connection, the terminal is provided with a routing module detection and an electric energy meter carrier module. During use, the input current is detected in real time through routing detection. When the electric energy meter carrier module detects a power outage or power failure, it sends an alarm message to the terminal. After the terminal receives the alarm message, it first retrieves all the active reporting records of power outages in the area, analyzes the power outage area in combination with the substation topology model, comprehensively develops the problem point where the fault occurs, and feeds back the judgment results to the operation and maintenance personnel. The operation and maintenance personnel can carry out power outage repairs in the shortest time and at the fastest speed, thereby reducing the losses caused by power outages to users and improving customer satisfaction with electricity consumption.

[0048] In step S2, the zero-crossing signal detection includes the following steps:

[0049] S21, collecting the level signal of the output of the optocoupler through a programmable logic device, and inverting the collected level signal;

[0050] S22, performing a logical operation of OR and NOT on the level signal and the negated level signal through a programmable logic device to obtain a square wave signal;

[0051] S23, measuring the square wave pulse signal through a programmable logic device;

[0052] S24. The programmable logic device outputs a narrow pulse at half the width of the square wave signal, and the narrow pulse corresponds to the zero-crossing point of the AC signal.

[0053] For example, refer to Figure 2 , the level signals output by the optocoupler device U1 and the optocoupler device U2 are collected through the programmable logic device, and the collected level signals are inverted, which are recorded as: S1, S2;

[0054] Perform a logical operation of OR and NON on signals S1 and S2 through a programmable logic device to obtain a square wave signal S3;

[0055] The pulse signal of square wave S3 is measured by a programmable logic device;

[0056] When the width of the square wave signal S3 is half, the programmable logic device outputs a narrow pulse S4 through the I / O output port, and S4 corresponds to the zero-crossing point of the AC signals L and N.

[0057] In step S5, the terminal determines whether it is a full carrier or a half carrier by obtaining the time domain signal waveform of the signal modulation mode when the electric energy meter carrier module is networked and the difference characteristics in modulation and demodulation.

[0058] Also included in step S7 are the steps of:

[0059] S71. When the analysis result is reported to the terminal, the terminal sends the analysis result to the user terminal and obtains the geographic location signal number of the user terminal.

[0060] For example, by obtaining the geographic location signal number of the user terminal, maintenance personnel can quickly help users who encounter power outages to perform repairs, thereby improving the user's power consumption experience.

[0061] Step S4 also includes a step of logically screening the power outage event:

[0062] S41. If a power outage event occurs in the terminal or the electric energy meter, but there is no power-on event for a long time, which is not a pair, it is judged as an abnormal power outage event. If there is a power-on event but no power outage event, it is judged as an abnormal power outage.

[0063] S42: If the power-on time is earlier than the power-off time, and the power-off / power-on time is empty or garbled, it is determined to be an abnormal power-off event;

[0064] S43: If the power outage time is less than the minimum effective interval of the power outage time, or exceeds the maximum effective interval of the power outage time, it is determined to be an abnormal power outage event.

[0065] Exemplarily, the local judgment logic mainly refers to the electric energy meter carrier module and the terminal routing detection module using software logic to determine whether there may be a power outage in the entire area. In particular, the power outage time is the time when the power-on event occurs - the time when the power outage event occurs, and the minimum / maximum effective interval of the power outage event can be set by the identification limit parameter.

[0066] In step S7, the specific process of the analysis is as follows:

[0067] The terminal generates a power outage event and collects power outage events reported by the carrier module of some electric energy meters. If the difference between the power outage time recorded in the electric energy meter and the terminal record exceeds the identification limit, or the power-off / power-on time difference exceeds the limit, the event logic in the table is wrong, there is no event in the table, etc., the attribute flag D1 position in the generated power outage event is set to "0", indicating an invalid power outage event, and it will not be reported;

[0068] If a matching power outage event occurs between the terminal and any electric energy meter that can communicate normally, the attribute flag D1 will be set to "1" in the generated power outage event record, indicating a valid power outage event, and it will be actively reported. If the terminal fails to communicate successfully with a certain electric energy meter set by the power outage data collection configuration parameters within the parameter setting time, the electric energy meter will not be included in the data source for this power outage event analysis.

[0069] Another embodiment of the present invention provides a low-voltage power outage and power restoration alarm system, which is used to execute the method of the above embodiment. The system includes a terminal and a user terminal that establish a communication connection. The terminal is provided with a routing detection module and an electric energy meter carrier module.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low voltage power outage alarm method, characterized in that: The method is applied to a low-voltage power outage and power restoration alarm system, the system includes a terminal and a user terminal that establish a communication connection, the terminal is provided with a routing detection module and an electric energy meter carrier module, and the method includes the following steps: S1. Detect the route access to the network through the electric energy meter carrier module; S2, synchronously detecting whether the zero-crossing signal of the AC signal routed into the network is lost through the electric energy meter carrier module; S3, if it is detected that the zero-crossing signal is lost, the plug-in pin level detection is performed to determine whether there is still a level signal through the plug-in pin level detection; S4. If it is determined that there is a problem with the plugging and unplugging of the pins, the module generates a power outage event; S5. Determine the nature of the carrier area to determine whether it is a full-carrier area. If it is a full-carrier area, report the power outage event in a bitmap manner. If it is a half-carrier area, report the power outage event in an address manner. In step S5, the terminal determines whether it is a full-carrier or half-carrier by obtaining the time domain signal waveform of the signal modulation mode when the electric energy meter carrier module is networked and the difference characteristics in modulation and demodulation; S6. Collect and listen to reports of power outage events from neighboring nodes through the routing detection module; S7, the routing detection module is used to make a judgment and form an analysis result and report it to the terminal; S8. When the module supercapacitor is exhausted, the analysis and reporting process ends.

2. A low voltage power outage alarm method according to claim 1, characterized in that: In step S2, the zero-crossing signal detection includes the following steps: S21, collecting the level signal of the output of the optocoupler through a programmable logic device, and inverting the collected level signal; S22, performing a logical operation of OR and NOT on the level signal and the negated level signal through a programmable logic device to obtain a square wave signal; S23, measuring the square wave pulse signal through a programmable logic device; S24. The programmable logic device outputs a narrow pulse at half the width of the square wave signal, and the narrow pulse corresponds to the zero-crossing point of the AC signal.

3. A low voltage power outage alarm method according to claim 1, characterized in that: Also included in step S7 are the steps of: S71. When the analysis result is reported to the terminal, the terminal sends the analysis result to the user terminal and obtains the geographic location signal number of the user terminal.

4. A low voltage power outage alarm method according to claim 1, characterized in that: Step S4 also includes a step of logically screening the power outage event: S41. If a power outage event occurs in the terminal or the electric energy meter, but there is no power-on event for a long time, which is not a pair, it is judged as an abnormal power outage event. If there is a power-on event but no power outage event, it is judged as an abnormal power outage. S42: If the power-on time is earlier than the power-off time, and the power-off / power-on time is empty or garbled, it is determined to be an abnormal power-off event; S43: If the power outage time is less than the minimum effective interval of the power outage time, or exceeds the maximum effective interval of the power outage time, it is determined to be an abnormal power outage event.

5. A low voltage power outage alarm method according to claim 4, characterized in that: In step S7, the specific process of the analysis is as follows: The terminal generates a power outage event and collects power outage events reported by some power meter carrier modules. If the difference between the power outage time recorded in the power meter and the terminal record exceeds the identification limit, or the power-off / power-on time difference exceeds the limit, or the event logic in the table is wrong, or there is no event in the table, the attribute flag D1 in the generated power outage event is set to "0", indicating an invalid power outage event, and it will not be reported; If a matching power outage event occurs between the terminal and any electric energy meter that can communicate normally, the attribute flag D1 will be set to "1" in the generated power outage event record, indicating a valid power outage event, and it will be actively reported. If the terminal fails to communicate successfully with an electric energy meter set by the power outage data collection configuration parameters within the parameter setting time, the electric energy meter will not be included in the data source for this power outage event analysis.

6. A low voltage power outage alarm system, characterized in that: The system is used to execute the method according to any one of claims 1 to 5, and the system includes a terminal and a user terminal for establishing a communication connection, and the terminal is provided with a routing detection module and an electric energy meter carrier module.

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