Method and system for detecting abnormity of load switch of low-voltage meter box

Abstract

The invention provides a method and system for detecting abnormity of a load switch of a low-voltage meter box, and the method comprises the steps: obtaining the target parameter information of a target low-voltage meter box, and screening the meter information in the target parameter information; the number of meters in the screened target parameter information is determined, if the number of meters in the screened target parameter information is larger than a preset first number threshold value, phase-by-phase checking is conducted on phase lines of the meters according to a preset checking standard, and a corresponding checking result is obtained; and determining whether the load switch corresponding to the meter is abnormal or not according to the troubleshooting result, and if so, outputting a corresponding alarm signal. The low-voltage load switch with poor contact can be found in time, loss of national assets caused by electric charge loss is avoided, electric appliance fire accidents are avoided, manpower and material resources can be saved, economic losses of an electric power department are reduced, and electric fire safety accidents are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a method and a system for detecting abnormality of a load switch of a low-voltage meter box. Background Art

[0002] In modern power systems, the low-voltage three-phase load switch installed at the front of the meter box is a key component for power transmission and distribution. Its stability and reliability are crucial to the safe operation of the entire power grid. However, in the long-term operation process, due to installation process or environmental corrosion, the low-voltage three-phase switch may have poor contact problems, which will not only cause power loss, but also may cause safety accidents such as electrical fires. Therefore, it is urgent and very important for the power department to detect the poor contact of the low-voltage load switch in a timely and accurate manner.

[0003] At present, there are two main ways to lock this anomaly. One is to find out whether there are abnormal conditions such as sparking or blackening at the contact of the load switch at the front end of the meter box through on-site inspection. In the face of hundreds of millions of low-voltage load switches in the power department and the shortage of manpower, this identification method is time-consuming and labor-intensive. It is difficult to find the abnormality in time, and the abnormality has already caused a fire or has obvious fire hazards. Another big data analysis method is to lock this anomaly by whether the meters in the meter box connected to the low-voltage load switch have a data feature of low voltage in a certain phase. However, the data feature of low voltage may also be manifested as low voltage in addition to poor contact of the low-voltage load switch. Poor contact of the metering device, too long power supply radius, and failure of the voltage components of the meter. At the same time, a considerable number of meters are restricted by the narrow-band narrow wave transmission capacity and server storage capacity. A considerable number of meters cannot obtain current and voltage, and cannot lock this anomaly through the voltage situation of the meter in the meter box. Summary of the invention

[0004] The purpose of the present invention is to provide a method and system for detecting abnormality of a load switch of a low-voltage meter box, so as to solve the technical problem of how to identify poor contact of a load switch based on voltage.

[0005] On the one hand, a method for detecting an abnormality of a load switch of a low-voltage meter box is provided, comprising:

[0006] Obtaining target parameter information of a target low-voltage meter box, and filtering meter information in the target parameter information;

[0007] Determine the number of meters in the filtered target parameter information, and if the number of meters in the filtered target parameter information is greater than a preset first number threshold, check the phase lines of the meters phase by phase according to a preset checking standard to obtain a corresponding checking result;

[0008] Determine whether the load switch corresponding to the meter is abnormal based on the troubleshooting results. If abnormal, output the corresponding alarm signal.

[0009] Preferably, the target parameter information includes at least the meter box number, the CT corresponding to each meter in the meter box, the magnification, the meter bureau code, the metering point number, the meter's current, voltage, user name and electricity address.

[0010] Preferably, the screening of the meter information in the target parameter information includes removing meters whose extracted data points do not exceed a preset point threshold, and removing meters whose voltage exceeds a preset voltage upper limit.

[0011] Preferably, the phase-by-phase checking of the phase lines of the meter according to the preset verification standards includes determining whether the phase A voltage of the meter is always within the preset voltage range based on the target parameter information. If the phase A voltage of the meter is always within the preset voltage range, it is determined that phase A of the load switch has poor contact.

[0012] Preferably, it also includes determining whether the voltages of the three phases A, B and C of the load switch are all low based on the target parameter information. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated.

[0013] Preferably, it also includes, if the A-phase voltage of the meter is not always within the preset voltage range, determining whether the B-phase voltage of the meter is always within the preset voltage range; if the B-phase voltage of the meter is always within the preset voltage range, determining that the B-phase of the load switch has poor contact.

[0014] Preferably, it also includes determining whether the voltages of the three phases A, B and C of the load switch are all low based on the target parameter information. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated.

[0015] Preferably, it also includes, if the B-phase voltage of the meter is not always within the preset voltage range, determining whether the C-phase voltage of the meter is always within the preset voltage range; if the C-phase voltage is always within the preset voltage range, determining that the C-phase of the load switch has poor contact.

[0016] Preferably, it also includes determining whether the voltages of the three phases A, B and C of the load switch are all low based on the target parameter information. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated.

[0017] On the other hand, a system for detecting an abnormality of a load switch of a low-voltage meter box is provided to implement the method for detecting an abnormality of a load switch of a low-voltage meter box, comprising:

[0018] A data acquisition module, used to acquire target parameter information of a target low-voltage meter box and filter meter information in the target parameter information;

[0019] A data processing module is used to determine the number of meters in the filtered target parameter information. If the number of meters in the filtered target parameter information is greater than a preset first number threshold, the phase lines of the meters are checked phase by phase according to a preset checking standard to obtain a corresponding checking result;

[0020] It is also used to determine whether the load switch corresponding to the meter is abnormal based on the inspection results. If it is abnormal, the corresponding alarm signal is output.

[0021] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0022] The method and system for detecting the abnormality of the load switch of the low-voltage meter box provided by the present invention take into account the factors that the meter cannot obtain the current and voltage and the voltage data is disordered, and also considers various other situations manifested as low voltage, and then adopts multi-angle and multi-dimensional identification and distinction from the perspective of the meter box, from the perspective of the uniformity of the low phase voltage of all meters in the meter box, and from the perspective of the three-phase uniformity of all meters. Low-voltage load switches with poor contact can be discovered in time, while avoiding the loss of state-owned assets caused by electricity bill losses, and also avoiding electrical fire accidents. It can realize timely contact of poor low voltage from hundreds of millions of metering devices. If applied to the system, it can realize real-time online monitoring of low voltage, which can save manpower and material resources, reduce economic losses in the power sector, and avoid the occurrence of power fire safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0024] Figure 1 The present invention is a schematic diagram of the main process of a method for detecting an abnormality of a load switch of a low-voltage meter box in an embodiment of the present invention.

[0025] Figure 2 The present invention is a logic diagram of a method for detecting an abnormality of a load switch of a low-voltage meter box according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 and Figure 2 FIG. 1 is a schematic diagram of an embodiment of a method for detecting an abnormality of a load switch of a low-voltage meter box provided by the present invention. In this embodiment, the method comprises the following steps:

[0028] Step S1, obtaining target parameter information of a target low-voltage meter box, and filtering meter information in the target parameter information; understandably, the target parameter information at least includes the meter box number, CT corresponding to each meter in the meter box, magnification, meter bureau number, metering point number, meter current, voltage, user name and electricity address. Taking the meter box as a unit, extract the current and voltage of all meters in the same meter box in the past 7 days.

[0029] In one embodiment, the screening of the meter information in the target parameter information includes removing meters whose extracted data points do not exceed a preset point threshold, and removing meters whose voltage exceeds a preset voltage upper limit. In this embodiment, meters whose extracted data points do not exceed 7 are removed; and meters whose voltage exceeds 400V are removed.

[0030] Step S2, determine the number of meters in the filtered target parameter information. If the number of meters in the filtered target parameter information is greater than the preset first quantity threshold, the phase lines of the meters are checked phase by phase according to the preset verification standard to obtain corresponding inspection results; understandably, determine whether the meter count under the meter box is greater than 12; if so, check phase by phase (enter phase A, phase B, phase C), if not, end.

[0031] In one embodiment, the phase-by-phase inspection of the phase line of the meter according to the preset inspection standard includes determining whether the phase A voltage of the meter is always within the preset voltage range according to the target parameter information. If the phase A voltage of the meter is always within the preset voltage range, it is determined that the phase A of the load switch has poor contact. It also includes determining whether the voltages of the three phases A, B and C of the load switch are all low according to the target parameter information. If not, it is determined that the load switch has poor contact. If so, the inspection is terminated. It is understandable that it is determined whether the phase A voltage of these meters is always between 185 and 200V. If so, the low-voltage load switch has poor contact in phase A. It is further determined whether the three-phase voltages of phase A, phase B and phase C are all low. If not, the low-voltage load switch has poor contact. If so, the inspection is terminated.

[0032] In one embodiment, if the A-phase voltage of the meter is not always within the preset voltage range, it is determined whether the B-phase voltage of the meter is always within the preset voltage range; if the B-phase voltage of the meter is always within the preset voltage range, it is determined that the B-phase of the load switch has poor contact. It also includes determining whether the voltages of the A-phase, B-phase and C-phase of the load switch are all low according to the target parameter information. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated. It is understandable that if the A-phase voltage of these meters is not always between 185 and 200V, it is determined whether the B-phase voltage of these meters is always between 185 and 200V. If so, the B-phase of the low-voltage load switch has poor contact, and it is further determined whether the A-phase, B-phase and C-phase voltages are all low. If not, the low-voltage load switch has poor contact. If so, the investigation is terminated.

[0033] In one embodiment, if the B-phase voltage of the meter is not always within the preset voltage range, it is determined whether the C-phase voltage of the meter is always within the preset voltage range. If the C-phase voltage is always within the preset voltage range, it is determined that the C-phase of the load switch has poor contact. According to the target parameter information, it is determined whether the voltages of the A-phase, B-phase and C-phase of the load switch are all low. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated. It is understandable that if the B-phase voltage of these meters is not always between 185 and 200V, it is determined whether the C-phase voltage of these meters is always between 185 and 200V. If so, the C-phase of the low-voltage load switch has poor contact. It is further determined whether the A-phase, B-phase and C-phase voltages are all low. If not, the low-voltage load switch has poor contact. If so, the investigation is terminated.

[0034] Step S3, determine whether the load switch corresponding to the meter is abnormal based on the results of the investigation, and if abnormal, output the corresponding alarm signal. It is understandable that the identification and distinction can be made from the perspective of the meter box, from the perspective of the uniformity of the low phase voltage of all meters in the meter box, and from the perspective of the three-phase uniformity of all meters. Starting from the voltage of the meter in the meter box connected to the low-voltage load switch circuit, when a phase of the low-voltage three-phase load switch has poor contact, all the meters in the meter box connected to its circuit show low voltage in this phase. This data feature locks the poor contact of the low-voltage load switch.

[0035] In an embodiment of the present invention, a system for detecting an abnormality of a load switch of a low-voltage meter box is further provided, which is used to implement the method for detecting an abnormality of a load switch of a low-voltage meter box, comprising:

[0036] A data acquisition module, used to acquire target parameter information of a target low-voltage meter box and filter meter information in the target parameter information;

[0037] A data processing module is used to determine the number of meters in the filtered target parameter information. If the number of meters in the filtered target parameter information is greater than a preset first number threshold, the phase lines of the meters are checked phase by phase according to a preset checking standard to obtain a corresponding checking result;

[0038] It is also used to determine whether the load switch corresponding to the meter is abnormal based on the inspection results. If it is abnormal, the corresponding alarm signal is output.

[0039] It should be noted that the system described in the above embodiment corresponds to the method described in the above embodiment. Therefore, the undetailed parts of the system described in the above embodiment can be obtained by referring to the contents of the method described in the above embodiment, and will not be repeated here.

[0040] In summary, the implementation of the embodiments of the present invention has the following beneficial effects:

[0041] The method and system for detecting the abnormality of the load switch of the low-voltage meter box provided by the present invention take into account the factors that the meter cannot obtain the current and voltage and the voltage data is disordered, and also considers various other situations manifested as low voltage, and then adopts multi-angle and multi-dimensional identification and distinction from the perspective of the meter box, from the perspective of the uniformity of the low phase voltage of all meters in the meter box, and from the perspective of the three-phase uniformity of all meters. Low-voltage load switches with poor contact can be discovered in time, while avoiding the loss of state-owned assets caused by electricity bill losses, and also avoiding electrical fire accidents. It can realize timely contact of poor low voltage from hundreds of millions of metering devices. If applied to the system, it can realize real-time online monitoring of low voltage, which can save manpower and material resources, reduce economic losses in the power sector, and avoid the occurrence of power fire safety accidents.

[0042] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A method for detecting an abnormality of a load switch of a low-voltage meter box, characterized in that: include: Obtaining target parameter information of a target low-voltage meter box, and filtering meter information in the target parameter information; Determine the number of meters in the filtered target parameter information, and if the number of meters in the filtered target parameter information is greater than a preset first number threshold, check the phase lines of the meters phase by phase according to a preset checking standard to obtain a corresponding checking result; Determine whether the load switch corresponding to the meter is abnormal based on the troubleshooting results. If abnormal, output the corresponding alarm signal.

2. The method according to claim 1, characterized in that The target parameter information includes at least the meter box number, the CT corresponding to each meter in the meter box, the magnification, the meter bureau number, the meter point number, the meter current, voltage, user name and electricity address.

3. The method according to claim 2, characterized in that The screening of the meter information in the target parameter information includes removing meters whose extracted data points do not exceed a preset point threshold, and removing meters whose voltage exceeds a preset voltage upper limit.

4. The method according to claim 3, characterized in that The phase line of the meter is checked phase by phase according to the preset verification standard, including determining whether the phase A voltage of the meter is always within the preset voltage range according to the target parameter information. If the phase A voltage of the meter is always within the preset voltage range, it is determined that the phase A of the load switch has poor contact.

5. The method according to claim 4, characterized in that It also includes determining, based on the target parameter information, whether the voltages of the three phases A, B and C of the load switch are all low. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated.

6. The method according to claim 4, characterized in that It also includes, if the A-phase voltage of the meter is not always within the preset voltage range, determining whether the B-phase voltage of the meter is always within the preset voltage range; if the B-phase voltage of the meter is always within the preset voltage range, determining that the B-phase of the load switch has poor contact.

7. The method according to claim 6, characterized in that It also includes determining, based on the target parameter information, whether the voltages of the three phases A, B and C of the load switch are all low. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated.

8. The method according to claim 6, characterized in that It also includes, if the B-phase voltage of the meter is not always within the preset voltage range, determining whether the C-phase voltage of the meter is always within the preset voltage range; if the C-phase voltage is always within the preset voltage range, determining that the C-phase of the load switch has poor contact.

9. The method according to claim 8, characterized in that It also includes determining, based on the target parameter information, whether the voltages of the three phases A, B and C of the load switch are all low. If not, it is determined that the load switch has poor contact. If so, the investigation is terminated.

10. A system for detecting abnormal load switches of low-voltage meter boxes, used to implement the method according to any one of claims 1 to 9, characterized in that: include, A data acquisition module, used to acquire target parameter information of a target low-voltage meter box and filter meter information in the target parameter information; A data processing module is used to determine the number of meters in the filtered target parameter information. If the number of meters in the filtered target parameter information is greater than a preset first number threshold, the phase lines of the meters are checked phase by phase according to a preset checking standard to obtain a corresponding checking result; It is also used to determine whether the load switch corresponding to the meter is abnormal based on the inspection results. If it is abnormal, the corresponding alarm signal is output.

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