A control method and device for street light leakage protection

Abstract

This invention relates to a control method and device for street light leakage current protection. The method first uses a single-pole street light leakage current detection device to collect the leakage current of a single street light pole; then, a street light circuit leakage current detection device detects the leakage current of each street light circuit; finally, the control host fuses the leakage current data of each pole and each street light circuit, processes and analyzes the data to determine the specific road section number, faulty street light circuit, and faulty street light pole number where the leakage fault occurred. Compared with existing technologies, this invention significantly improves the efficiency of leakage fault troubleshooting and fault location.

Description

Technical Field

[0001] This invention relates to electrical safety technology for streetlights, and in particular to a control method and device for leakage protection of streetlights. Background Technology

[0002] In the past, street lighting safety primarily relied on detecting leakage current in the streetlight circuit for protection. Accurately collecting and utilizing leakage current in streetlight systems has become a crucial technology for addressing this issue. Streetlight leakage current detection technology is a specialized and demanding technique that can monitor leakage current and ground insulation of individual streetlight poles, as well as the total leakage current of the entire streetlight circuit, thereby achieving seamless leakage current protection for the entire streetlight system.

[0003] In addressing street light leakage, leakage protection has undergone three stages of development: mechanical RCDs for the main leakage protection device in the distribution box circuit, mechanical RCDs for the leakage protection device inside the street light pole, and intelligent electronic leakage protection devices. Mechanical RCDs for the main leakage protection device in the distribution box circuit cannot distinguish between leakage at the street light pole and a fault in the distribution circuit, making them prone to false tripping in high humidity due to increased leakage. While single-pole mechanical RCD protection can provide leakage protection for a single street light pole, temporary leakage caused by benign faults can prevent automatic reclosing after activation, affecting normal operation.

[0004] Currently, the methods for implementing a leakage current detection system for the entire streetlight system include measuring the sum of the leakage currents in each streetlight circuit under the same transformer. While measuring the leakage current of the entire streetlight circuit provides a relatively complete measurement of the system's leakage current, streetlights themselves also have leakage current to ground, which increases during rainy weather, making it impossible to quantify whether the leakage is a genuine fault in the circuit or streetlight itself. Furthermore, since the specific location of a leakage fault cannot be directly pinpointed after it occurs, manual investigation of the leakage location and cause is still required, indicating that there is still no ideal solution for fault diagnosis. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a control method and device for street light leakage protection.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, a control method for street light leakage current protection is provided. The method first uses a single-pole street light leakage current detection device to collect the leakage current of a single street light pole; then, a street light circuit leakage current detection device detects the leakage current of each street light circuit; finally, the control host fuses the leakage current data of each pole and the leakage current data of each street light circuit, processes and analyzes the data, and obtains the specific road section number, faulty street light circuit, and faulty street light pole number where the leakage current fault occurred.

[0008] As a preferred technical solution, the control host is an HPLC host.

[0009] As a preferred technical solution, the method specifically includes the following steps:

[0010] Step a. The single-pole street light leakage current detection device collects the real-time leakage current value of each light pole in the street light system and uploads the data to the HPLC host;

[0011] Step b. The single-pole street light leakage current detection device determines whether the real-time leakage current collected by each light pole in the street light system exceeds the set leakage current; if it does not exceed the set leakage current, continue to step a to collect leakage current data; if it exceeds the set leakage current, proceed to step c.

[0012] Step c. Disconnect the power supply to the street light pole by tripping the relay;

[0013] Step d. After disconnecting the relay, measure the ground impedance of the street light pole to determine if it is higher than the set ground impedance. If it is higher than the set ground impedance, proceed to step e for the relay; otherwise, proceed to step h.

[0014] Step e. If the reclosing is determined to be in a normal state and the leakage current exceeds the standard, continue to step a; if it is lower than the set ground impedance, it is determined to be a real leakage fault and the fault information is uploaded to the HLPC host.

[0015] Step f. The street light circuit leakage current detection device collects the leakage current value of each street light circuit and uploads the real-time leakage current value to the HPLC host;

[0016] Step g. The street light circuit leakage detection device determines whether the real-time leakage current collected by each street light circuit in the street light system exceeds the set leakage current; if it does not exceed the set leakage current, it continues to step f to collect leakage current data; if it exceeds the set leakage current, it uploads the fault information to the HPLC host and executes step h.

[0017] Step h. The HPLC host summarizes and calculates the total leakage current value of each street light circuit and the leakage current value of each light pole, determines the specific circuit with the fault and the corresponding street light pole number or the road section information corresponding to the fault, and uploads it to the cloud platform for big data analysis.

[0018] As a preferred technical solution, the HPLC host displays specific real-time leakage current values ​​and fault information on the street light distribution map on the management panel, generating a leakage fault information form.

[0019] According to another aspect of the present invention, an apparatus is provided for the control method for street light leakage protection, the apparatus comprising a single-pole street light leakage detection device, a street light circuit leakage detection device, an HPLC host, and a cloud platform;

[0020] The single-pole street light leakage detection device and the street light circuit leakage detection device are respectively connected to the HPLC host to collect real-time leakage current and leakage fault information of the entire street light system. The HPLC host is connected to the cloud platform to upload data to the cloud platform.

[0021] As a preferred technical solution, the single-pole street light leakage current detection device is placed inside each street light pole in the street light system to collect the leakage current and ground impedance of each pole, and can physically disconnect the power supply to the faulty pole after a fault occurs.

[0022] As a preferred technical solution, the street light circuit leakage detection device is used to detect leakage in each street light circuit.

[0023] As a preferred technical solution, the HPLC host is connected to the single-pole street light leakage detection device and the street light circuit leakage detection device respectively via broadband power line carrier.

[0024] As a preferred technical solution, the HPLC host performs data acquisition and summary calculations to locate the fault point and upload the data to the cloud platform.

[0025] As a preferred technical solution, the cloud platform performs big data analysis and fault display on the data uploaded by the HPLC host.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1) By measuring the actual ground impedance of the power supply cable and the lamp to the ground after the power supply to the street light pole is cut off in case of leakage fault, the system can determine whether a real leakage fault has occurred. It also has a reclosing function. First, it can avoid the problem of false alarms of leakage faults caused by strong winds and thunderstorms. Second, by measuring the ground impedance, it can determine the specific power supply phase line where the leakage fault occurred, which greatly improves the efficiency of leakage fault elimination and fault location.

[0028] 2) The use of a street light circuit leakage current detection device to measure the leakage current of the entire street light circuit supplements the leakage current collection of individual street light poles, which cannot protect against leakage faults in the power supply cables between street light poles, and achieves high-precision all-round leakage current measurement and protection for the entire street light system.

[0029] 3) Broadband power line carrier HPLC is used as the communication between the street light circuit leakage detection device and the single-pole street light leakage detection device and the HPLC host. Data can be transmitted directly through the power supply cable, which solves the problem of weak signal of wireless devices inside the street light pole or the additional cost of adding communication lines for data acquisition.

[0030] 4) Use a cloud platform to display data of the entire street light system, which facilitates the dispatching of personnel and the allocation of fault tasks by management personnel. Attached Figure Description

[0031] Figure 1 This is a flowchart of the method of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of the device of the present invention. Detailed Implementation

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] The street light leakage current solution of the present invention can detect leakage current in a single circuit and a single light pole. Data is collected by HPLC power line carrier and uploaded to the cloud platform through a gateway for more detailed data analysis. It can identify the specific light pole and the faulty power distribution line section, promptly identify potential faults, and prompt relevant personnel to assign tasks for handling, thus simplifying the management and maintenance process.

[0035] The present invention adopts a high-precision leakage detection circuit to collect the leakage current of a single street lamp pole, so as to detect weak leakage current; at the same time, the leakage of the street lamp circuit is detected to collect the leakage detection data of each street lamp pole for the street lamp system data; finally, the HPLC host performs data fusion on the leakage data of each lamp pole and the leakage data of each street lamp circuit; the HPLC host processes and analyzes the data to confirm the road section number, faulty street lamp circuit and faulty street lamp pole number where the leakage fault specifically occurs.

[0036] Figure 1 The specific process of multi-device control of the present invention is shown, and the leakage protection control of the entire street lamp system is completed. Taking the single-pole street lamp leakage detection device, street lamp circuit leakage detection device, and HPLC host as examples below, combined with Figure 1 The following synchronous control steps are described in detail:

[0037] In step 401, the single-pole street lamp leakage detection device continuously collects the real-time leakage current value of each lamp pole in the street lamp system and uploads the data to the HPLC host;

[0038] In step 402, the single-pole street lamp leakage detection device determines whether the real-time leakage collected for each lamp pole in the street lamp system exceeds the set leakage current; if it does not exceed the set leakage current, then continue with step 401 to collect leakage current data; if it exceeds the set leakage current, then perform relay tripping to disconnect the power supply of the lamp pole to prevent leakage from affecting personal safety. Specifically, it includes:

[0039] When the real-time leakage IDG < 15 mA collected by the lamp pole, the single-pole street lamp leakage detection device uploads the real-time data to the HPLC host for real-time data collection;

[0040] When the real-time leakage 15 mA < IDG < 30 mA is collected by the lamp pole, the single-pole street lamp leakage detection device uploads the real-time data to the HPLC host for real-time data collection as an early leakage warning;

[0041] When the real-time leakage 30 mA < IDG is collected by the lamp pole, the single-pole street lamp leakage detection device will perform relay output according to the set action time TD; when the real-time leakage 30 mA < IDG is collected by the lamp pole, timing starts, and if the duration of the real-time leakage 30 mA < IDG exceeds the action time TD, the relay is disconnected to cut off the power supply of the lamp pole to prevent leakage and injury incidents, otherwise continue to repeat step 1;

[0042] In step 403, after disconnecting the relay, measure the impedance to ground of the street lamp pole to determine whether it exceeds the set impedance to ground. If it does not exceed the set impedance to ground, perform step 405 on the relay. If the reclosing is determined to be in a normal state but the leakage current exceeds the standard, continue with step 401. If it is lower than the set impedance to ground, it is determined as a real leakage fault and the fault information is uploaded to the HLPC host.

[0043] When the impedance to ground < 20 KΩ, the single-pole street lamp leakage detection device will continuously measure the impedance to ground;

[0044] When the impedance to ground > 20 KΩ, the single-pole street lamp leakage detection device will perform relay reclosing to restore the power supply of the street lamp pole and repeat step 1;

[0045] In step 406, the street lamp loop leakage detection device collects the leakage current values of each street lamp loop line and uploads the real-time leakage current values to the HPLC host;

[0046] In step 407, the street lamp loop leakage detection device determines whether the real-time leakage current collected from each street lamp loop line in the street lamp system exceeds the set leakage current. If it does not exceed the set leakage current, continue with step 406 to collect leakage current data. If it exceeds the set leakage current, the fault information will be uploaded to the HPLC host.

[0047] When 150 mA < IHL < 300 mA of the real-time leakage current collected by the street lamp loop leakage detection device, the street lamp loop leakage detection device will upload the real-time data to the HPLC host for real-time data collection as an early leakage warning;

[0048] When the real-time leakage current IHL > 300 mA collected by the street lamp loop leakage detection device, the street lamp loop leakage detection device will upload the real-time data to the HPLC host for real-time data collection as a leakage alarm;

[0049] In step 407, the HPLC host performs data aggregation and calculation on the total leakage value of each street lamp loop and the leakage current value of each lamp pole, determines the specific loop where the fault occurs and the corresponding street lamp pole number or the section information corresponding to the fault, and uploads it to the cloud platform for big data analysis, and displays the specific real-time leakage current value and fault information on the street lamp distribution map of the management panel to generate a leakage fault information form.

[0050] When the HPLC host collects that the leakage current of the street lamp pole exceeds the warning value, it will upload the relevant street lamp pole number to the cloud platform;

[0051] The HPLC host considers that the street light circuit cable has a leakage current rather than the street light pole leakage current when IHL>IDG1+IDG2+IDG3+…+IDGn. The HPLC host then uploads the corresponding street light circuit with leakage fault to the cloud platform.

[0052] like Figure 2 As shown, this invention treats multiple streetlight poles as a single streetlight circuit. A streetlight circuit leakage current detection device monitors the leakage current of the entire circuit, while a single-pole streetlight leakage current detection device monitors the leakage current of each pole within the circuit. The data is then uploaded to an HPLC host, which in turn uploads the data to a cloud platform. This invention comprises multiple single-pole streetlight leakage current detection devices, multiple single-pole streetlight circuit leakage current detection devices, and an HPLC host. The single-pole streetlight leakage current detection devices within each streetlight pole are connected to the power input side of the pole to monitor the leakage current of the entire pole. The streetlight circuit leakage current detection devices are positioned at the very beginning of the power supply side of the entire circuit for monitoring the leakage current of the entire streetlight circuit. The HPLC host collects and uploads the data from the entire streetlight system to the cloud platform.

[0053] This invention adopts a client / server (C / S) model, networking the HPLC hosts in the entire street light system. Under normal conditions without leakage faults, the HPLC hosts periodically upload data to the cloud platform. In the event of a leakage fault, the current street light system leakage fault is immediately uploaded. The cloud platform can control the relay closure of the single-pole street light leakage detection device in each street light pole through the HPLC hosts. The cloud platform can also set early warning alarm information for the leakage detection device of each street light circuit through the HPLC hosts.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A control method for street light leakage protection, characterized in that, The method first uses a single-pole street light leakage current detection device to collect the leakage current of a single street light pole; then, a street light circuit leakage current detection device detects the leakage current of each street light circuit; finally, the control host fuses the leakage current data of each light pole and the leakage current data of each street light circuit, processes and analyzes the data, and obtains the specific road section number, faulty street light circuit, and faulty street light pole number where the leakage fault occurred. The control unit is an HPLC unit; The method specifically includes the following steps: Step a. The single-pole street light leakage current detection device collects the real-time leakage current value of each light pole in the street light system and uploads the data to the HPLC host; Step b. The single-pole street light leakage current detection device determines whether the real-time leakage current collected by each light pole in the street light system exceeds the set leakage current; if it does not exceed the set leakage current, continue to step a to collect leakage current data; if it exceeds the set leakage current, proceed to step c. Step c. Disconnect the power supply to the street light pole by tripping the relay; Step d. After disconnecting the relay, measure the ground impedance of the street light pole to determine if it is higher than the set ground impedance. If it is higher than the set ground impedance, proceed to step e for the relay; otherwise, proceed to step h. Step e. If the reclosing is determined to be in a normal state and the leakage current exceeds the standard, continue to step a; if it is lower than the set ground impedance, it is determined to be a real leakage fault and the fault information is uploaded to the HLPC host. Step f. The street light circuit leakage current detection device collects the leakage current value of each street light circuit and uploads the real-time leakage current value to the HPLC host; Step g. The street light circuit leakage detection device determines whether the real-time leakage current collected by each street light circuit in the street light system exceeds the set leakage current; if it does not exceed the set leakage current, it continues to step f to collect leakage current data; if it exceeds the set leakage current, it uploads the fault information to the HPLC host and executes step h. Step h. The HPLC host summarizes and calculates the total leakage current value of each street light circuit and the leakage current value of each light pole, determines the specific circuit with the fault and the corresponding street light pole number or the road section information corresponding to the fault, and uploads it to the cloud platform for big data analysis. When the HPLC host detects a real-time leakage current IHL>(IDG1+IDG2+IDG3+…+IDGn) collected by the street light circuit leakage detection device, it considers that there is a leakage in the street light circuit cable rather than a leakage in the street light pole, where IDGn is the nth street light pole with leakage. The HPLC host then uploads the corresponding street light circuit with leakage fault to the cloud platform.

2. The control method for street light leakage protection according to claim 1, characterized in that, The HPLC host displays the specific real-time leakage current value and fault information on the street light distribution map on the management panel, generating a leakage fault information form.

3. An apparatus for use in the control method for street light leakage protection as described in claim 1, characterized in that, The device includes a single-pole street light leakage current detection device, a street light circuit leakage current detection device, an HPLC main unit, and a cloud platform; The single-pole street light leakage detection device and the street light circuit leakage detection device are respectively connected to the HPLC host to collect real-time leakage current and leakage fault information of the entire street light system. The HPLC host is connected to the cloud platform to upload data to the cloud platform.

4. The apparatus according to claim 3, characterized in that, The single-pole street light leakage current detection device is placed inside each street light pole in the street light system to collect the leakage current and ground impedance of each pole, and can physically disconnect the power supply to the faulty pole after a fault occurs.

5. The apparatus according to claim 3, characterized in that, The aforementioned street light circuit leakage detection device is used to detect leakage in each street light circuit.

6. The apparatus according to claim 3, characterized in that, The HPLC host is connected to the single-pole street light leakage detection device and the street light circuit leakage detection device via broadband power line carrier.

7. The apparatus according to claim 3, characterized in that, The HPLC host performs data acquisition and aggregation calculations to locate the fault point and upload the data to the cloud platform.

8. The apparatus according to claim 3, characterized in that, The cloud platform performs big data analysis and fault display on the data uploaded by the HPLC host.

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