A street lamp leakage protection device

Abstract

The application discloses a street lamp electric leakage protection device, which comprises a three-phase lighting switch, street lamps distributed on a three-phase power supply circuit and a street lamp safety power supply device; the street lamps on each phase power supply circuit are placed in sequence and adjacently, and all the street lamps on the three-phase power supply circuit are placed in sequence and adjacently; the street lamps are placed at equal intervals between each other, and the street lamp safety power supply device is arranged at the first street lamp on each phase power supply circuit. The street lamps on each phase power supply circuit of the lighting switch are centrally arranged, and all the street lamps are adjacently arranged at equal intervals, so that the distance between the street lamp safety power supply device and the tail end of the electric pole is reduced, the electric leakage current of each phase is reduced, and the safety coefficient of the street lamp is improved.

Description

Technical Field

[0001] This invention relates to the field of power systems, and in particular to a street light leakage protection device. Background Technology

[0002] Streetlights are ubiquitous in cities and are a vital part of urban infrastructure. During operation, streetlights can experience electrical leakage due to various factors, including flooding, aging wiring, poor cable insulation, rectifier overheating, external damage, and product quality issues. This leakage can cause the metal poles of the streetlights to become electrified, directly endangering pedestrian safety. In recent years, safety accidents caused by electrical leakage from streetlights have occurred frequently across the country. Therefore, ensuring the safe and normal operation of streetlights and protecting people's lives and property necessitates implementing anti-leakage measures for streetlights.

[0003] See Figure 1 As shown, according to the existing street light arrangement (taking 18 poles per lighting switch as an example), the leakage current of the power supply system is directly proportional to the cable length. For ease of comparison, assume the pole spacing is equal to 3 times the length of a single pole cable. The leakage current per phase = a proportional constant (k) related to the system voltage * (distance from the street light safety power supply device to the end pole * pole spacing + number of street lights * length of a single pole cable). Therefore, the leakage current of phase A = k * (17 * 3 * length of a single pole cable + 6 * length of a single pole cable) = 57k * length of a single pole cable, the leakage current of phase B = k * (15 * 3 * length of a single pole cable + 6 * length of a single pole cable) = 51k * length of a single pole cable, and the leakage current of phase C = k * (13 * 3 * length of a single pole cable + 6 * length of a single pole cable) = 45k * length of a single pole cable.

[0004] It is evident that the leakage current of three-phase electric shock in existing technologies varies and is relatively large, which can easily lead to the leakage current at the grounding point of a single phase of the street lighting system exceeding the safe current, causing electric shock injuries to people from street light poles.

[0005] Therefore, a safer street light leakage protection device is needed to prevent electric shock. Summary of the Invention

[0006] In view of this, the purpose of this invention is to provide a street light leakage current protection device, system, apparatus, and computer-readable storage medium that is safer and can prevent electric shock. The specific solution is as follows:

[0007] A street light leakage protection device includes a three-phase lighting switch, street lights distributed on the three-phase power supply circuit, and a street light safety power supply device;

[0008] Streetlights on each phase power supply circuit are placed adjacent to each other in sequence, and all streetlights on the three-phase power supply circuit are placed adjacent to each other in sequence, with equal spacing between each streetlight. A streetlight safety power supply device is installed at the first streetlight on each phase power supply circuit.

[0009] Optionally, the spacing between each street light is 3 times the length of a single pole cable.

[0010] Optionally, the street light safety power supply device includes a miniature circuit breaker, a surge protector, an isolation transformer, and an insulation circuit breaker;

[0011] The miniature circuit breaker and the surge protector are respectively connected to the isolation transformer, and the isolation transformer is connected to the insulation circuit breaker;

[0012] The miniature circuit breaker is used for power supply protection and as backup protection for the surge protector.

[0013] The surge protector is used to prevent overvoltage from damaging the street light safety power supply device and street light facilities;

[0014] The isolation transformer is used to convert the mains power output from the three-phase lighting switch into a safe power supply for the IT system, so that the initial grounding leakage current does not exceed 30mA.

[0015] The insulating circuit breaker is used for insulation protection.

[0016] Optionally, the isolation transformer is also used to make the voltage of the first street lamp in the current power supply circuit the same as the voltage of the first street lamp in other power supply circuits.

[0017] Optionally, the insulating circuit breaker is a smart circuit breaker;

[0018] The intelligent circuit breaker is used to trigger an alarm when the leakage current is less than 30mA and to trip and trigger an alarm when the leakage current is greater than 30mA.

[0019] Optionally, it may also include a remote communication device;

[0020] The remote communication device is used to send the operating parameters of the street light safety power supply device and receive remote control commands to control the street light safety power supply device.

[0021] The operating parameters include the operating parameters and alarm information of the intelligent circuit breaker, and the remote control commands include commands to control the opening and closing of the intelligent circuit breaker, so as to make the intelligent circuit breaker open and close.

[0022] Optionally, a remote monitoring platform may also be included;

[0023] The remote monitoring platform is used to receive the operating parameters of the street light safety power supply device sent by the remote communication device and to send remote control commands to control the street light safety power supply device.

[0024] In this invention, the street light leakage protection device includes a three-phase lighting switch, street lights distributed on the three-phase power supply circuit, and a street light safety power supply device; the street lights on each phase power supply circuit are arranged sequentially adjacent to each other, and all the street lights on the three-phase power supply circuit are arranged sequentially adjacent to each other, with equal spacing between each street light, and a street light safety power supply device is installed at the first street light on each phase power supply circuit.

[0025] This invention centralizes the streetlights on each phase power supply circuit of the lighting switch, and arranges them adjacent to each other with equal spacing. This reduces the distance between the streetlight safety power supply device and the end pole, reduces the leakage current of each phase, and improves the safety factor of the streetlights. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a street light leakage protection device in the prior art.

[0028] Figure 2 This is a schematic diagram of a street light leakage protection device disclosed in an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of another street light leakage protection device disclosed in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of another street light leakage protection device disclosed in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of a street light safety power supply device disclosed in an embodiment of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention discloses a street light leakage protection device, see [link to relevant documentation]. Figures 2 to 4 As shown, the device includes a three-phase lighting switch 11, streetlights 12 distributed on the three-phase power supply circuit, and a streetlight safety power supply device;

[0034] The streetlights 12 on each phase power supply circuit are placed adjacent to each other in sequence, and all the streetlights 12 on the three-phase power supply circuit are placed adjacent to each other in sequence. Each streetlight 12 is placed at equal intervals, and a streetlight safety power supply device is installed at the first streetlight 12 on each phase power supply circuit.

[0035] Specifically, the loads on each phase of the power supply circuit, i.e., the streetlights 12, are no longer randomly distributed. Instead, the streetlights 12 on each phase of the power supply circuit are centrally configured, and arranged adjacent to each other at equal intervals. For example, poles 1 to 6, poles 7 to 12, poles 13 to 18. After the streetlights 12 on one phase of the power supply circuit are configured, the streetlights 12 on the next phase of the power supply circuit are arranged adjacent to each other. While ensuring that all streetlights 12 are evenly distributed, the streetlights 12 are evenly distributed among the three phases of the power supply circuit. This ensures that the distance between the safety power supply device of the streetlights on each phase of the power supply circuit and the last streetlight 12 on that phase is not too large. This is because the magnitude of the leakage current flowing into the human body is equal to the total distributed capacitance current in the circuit. The total distributed capacitance current in the circuit is proportional to the length of the power supply cable. The longer the power supply cable, the larger the distributed capacitance. The power supply cable is the distance from the safety power supply device to the last pole, i.e., the last streetlight 12. Therefore, we need to limit the distance from the safety power supply device to the last pole to reduce the leakage current.

[0036] For example, see Figures 2 to 4 As shown, taking 12 out of 18 streetlights as an example, after rearranging the three-phase loads supplying the 12 streetlight poles, for any lighting switch power supply circuit, the leakage current of phase A = leakage current of phase B = leakage current of phase C = leakage current of each phase = k * (distance from the streetlight safety power supply device to the end pole * pole spacing + number of streetlights * length of cable per pole) = k * (5 * 3 * length of cable per pole + 6 * length of cable per pole) = 21k * length of cable per pole. Compared to Figure 1 The leakage current in the embodiments of the present invention is reduced by 2.1 to 2.7 times compared with the prior art.

[0037] As can be seen, in this embodiment of the invention, the streetlights 12 on each phase power supply circuit of the lighting switch are centrally configured and all are arranged adjacently at equal intervals, which reduces the distance between the streetlight safety power supply device and the tail pole, reduces the leakage current of each phase, and improves the safety factor of the streetlights 12.

[0038] The spacing between each street light 12 can be set within 3 times the length of a single pole cable.

[0039] This invention discloses a specific leakage current protection device for a street light 12. Compared with the previous embodiment, this embodiment further explains and optimizes the technical solution. See also... Figure 5 As shown, specifically:

[0040] Specifically, the aforementioned street light safety power supply device may include a miniature circuit breaker 21, a surge protector 22, an isolation transformer 23, and an insulation circuit breaker 24.

[0041] Miniature circuit breaker 21 and surge protector 22 are respectively connected to isolation transformer 23, and isolation transformer 23 is connected to insulation circuit breaker 24;

[0042] Miniature circuit breaker 21 is used for power supply protection and as backup protection for surge protector 22;

[0043] Surge protector 22 is used to prevent overvoltage from damaging the safety power supply device of the street light and the facilities of the street light 12;

[0044] Isolation transformer 23 is used to convert the mains power output from three-phase lighting switch 11 into a safe power supply for IT systems so that the initial grounding leakage current does not exceed 30mA;

[0045] Insulating circuit breaker 24 is used for insulation protection.

[0046] Specifically, the isolation transformer 23 converts the mains power output from the three-phase lighting switch 11 into a safe power supply for the IT system, making the power supply for the streetlight 12 a highly reliable and safe power source. This prevents electric shock injuries caused by touching the live wire of the mains power. The safe power after passing through the isolation transformer 23 will not cause injury if a person touches the live wire. It can effectively prevent accidents that could cause harm to people in the vicinity when the energized conductor at the lower end of the utility pole is submerged in water.

[0047] Furthermore, by increasing its own capacity, the isolation transformer 23 aims to control the leakage current of the street light 12 to less than 30mA when the first grounding leakage current occurs, and preferably leaves a margin, based on the actual situation.

[0048] Specifically, surge protector 22 can effectively prevent damage to the street light safety power supply device and street light 12 facilities caused by induced lightning and other operational overvoltages.

[0049] Specifically, the isolation transformer 23 can also be used to make the voltage of the first street lamp 12 in the current power supply circuit the same as the voltage of the first street lamp 12 in other power supply circuits. The isolation transformer 23 connects the voltage of the first pole of each phase (i.e., the mounting pole of the street lamp safety power supply device, the first street lamp 12 in a single-phase power supply circuit, such as...) to the voltage of the first street lamp 12 in other power supply circuits. Figures 2 to 4 After the power supply voltages of poles 1, 7, and 13 are adjusted to be consistent, the maximum voltage difference between poles will be reduced by existing technology. Figure 1The voltage difference between individual poles was reduced from 17 times Δu (assuming a voltage difference of Δu) to 5 times Δu, resulting in more uniform brightness for streetlight 12. This avoids the problem of excessive brightness deviation caused by excessive voltage drop in the line for streetlight 12, while also maintaining the basic balance of the three-phase load distribution in the entire lighting distribution box. The original phase-to-phase current balance between the three phases of the same lighting switch was transformed into a phase-to-phase current balance that alternates between different lighting switches.

[0050] Specifically, the insulation circuit breaker 24 can be a smart circuit breaker; the smart circuit breaker is used to alarm when the leakage current is less than 30mA; and to trip and alarm when the leakage current is greater than 30mA.

[0051] Specifically, because the leakage current of the street light 12 leakage protection device in the improved embodiment of the present invention will not exceed 30mA when leakage is first triggered, for example, it will be between 3mA and 30mA. Leakage current within this range will not cause injury, so there is no need to immediately trigger a trip, causing the street light 12 lighting system to go offline and affecting road safety. In this case, only an alarm is needed, providing time for maintenance personnel to arrive at the scene and extending the working time of the street light 12 lighting system. Of course, when leakage current is triggered again after the first trigger, because the power supply nature has changed after the IT system's first grounding, becoming almost like mains power, if this is not handled in time, and a live wire grounding occurs again, the leakage current will be greater than 30mA. To ensure personnel safety, the intelligent circuit breaker will trip and alarm, specifically with a tripping delay of approximately 0.1 seconds.

[0052] To prevent smart circuit breakers from triggering alarms due to even a small leakage current, an alarm threshold can be set, for example, 3mA. An alarm will only be triggered when the leakage current is greater than 3mA, and only when the leakage current is greater than 3mA but less than 30mA will an alarm be triggered.

[0053] Specifically, it may also include a remote communication device 25; the remote communication device 25 is used to send the operating parameters of the street light safety power supply device; and to receive remote control commands to control the street light safety power supply device.

[0054] The operating parameters include the operating parameters and alarm information of the intelligent circuit breaker, and the remote control commands, including the commands to control the opening and closing of the intelligent circuit breaker, so as to enable the intelligent circuit breaker to open and close.

[0055] Specifically, the remote communication device 25 can be used to remotely monitor the operation of each device in the street light safety power supply device, such as the intelligent circuit breaker and the isolation transformer 23. The remote communication device 25 can effectively provide feedback on the current operating status of the intelligent circuit breaker, such as whether it is open or closed, and the voltage of the isolation transformer 23. It can also remotely control the opening and closing of the intelligent circuit breaker and the voltage of the isolation transformer 23. For example, when the first leakage current is triggered, the maintenance personnel can actively control the intelligent circuit breaker to open according to the situation to ensure the safety of the area around the street light 12. They can also adjust the isolation transformer 23 according to the current feedback voltage of the isolation transformer 23.

[0056] Among them, the remote communication device 25 can conduct remote communication through carrier waves or wireless, optical fiber and other media.

[0057] Specifically, it may also include a remote monitoring platform; the remote monitoring platform is used to receive the operating parameters of the street light safety power supply device sent by the remote communication device 25 and to send remote control commands to control the street light safety power supply device.

[0058] Specifically, the remote monitoring platform can remotely monitor the safety power supply device of each street light through the remote communication device 25, balance the load of each phase, and ensure the safety of the entire street light 12 lighting system.

[0059] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0060] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0061] The technical content provided by the present invention has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A street light leakage protection device, characterized by, Includes three-phase lighting switches, streetlights distributed on the three-phase power supply circuit, and streetlight safety power supply devices; Streetlights on each phase power supply circuit are placed adjacent to each other in sequence, and all streetlights on the three-phase power supply circuit are placed adjacent to each other in sequence. Each streetlight is placed at equal intervals, with a spacing of 3 times the length of a single pole cable. A streetlight safety power supply device is installed at the first streetlight on each phase power supply circuit. The street light safety power supply device includes an isolation transformer, which is used to convert the mains power output from the three-phase lighting switch into an IT system safety power supply so that the initial grounding leakage current does not exceed 30mA. The isolation transformer is also used to make the voltage of the first street lamp in the current power supply circuit the same as the voltage of the first street lamp in other power supply circuits; The street light safety power supply device also includes a miniature circuit breaker, a surge protector, an isolation transformer, and an insulation circuit breaker; the miniature circuit breaker and the surge protector are respectively connected to the isolation transformer, and the isolation transformer is connected to the insulation circuit breaker; The miniature circuit breaker is used for power supply protection and as backup protection for the surge protector; the surge protector is used to prevent overvoltage from damaging the street light safety power supply device and street light facilities; the insulation circuit breaker is used for insulation protection.

2. The street light leakage protection device according to claim 1, characterized in that, The insulating circuit breaker is an intelligent circuit breaker; The intelligent circuit breaker is used to trigger an alarm when the leakage current is less than 30mA and to trip and trigger an alarm when the leakage current is greater than 30mA.

3. The street light leakage protection device according to claim 2, characterized in that, It also includes remote communication devices; The remote communication device is used to send the operating parameters of the street light safety power supply device and receive remote control commands to control the street light safety power supply device. The operating parameters include the operating parameters and alarm information of the intelligent circuit breaker, and the remote control commands include commands to control the opening and closing of the intelligent circuit breaker, so as to make the intelligent circuit breaker open and close.

4. The street light leakage protection device according to claim 3, characterized in that, It also includes a remote monitoring platform; The remote monitoring platform is used to receive the operating parameters of the street light safety power supply device sent by the remote communication device and to send remote control commands to control the street light safety power supply device.

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