Junction box and power system
By designing a junction box with multiple switches and detection devices, the problem of low-voltage line power generation during transformer bench maintenance is solved, efficient and flexible low-voltage power generation and safety monitoring is achieved, and power supply reliability and maintenance efficiency are improved.
Patent Information
- Application Number
- CN202411743283.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-03-04
AI Technical Summary
During the maintenance of transformer mounts, low-voltage lines are difficult to generate power and the environment is complex, resulting in limited generation timeliness and convenience, affecting power supply reliability.
A junction box is designed, including multiple switches and detection devices, and the functions of low-voltage power generation, phase regulation, grounding, etc. are realized through different switch combinations, to monitor the line temperature and current, ensure safe operation and issue alarm prompts.
It improves the flexibility and scope of application of low-voltage power generation, ensures the power supply reliability of electricity users, simplifies the connection mode of low-voltage lines, and reduces the complexity and time-consuming of maintenance work.
Smart Images
Figure CN119560951A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of power distribution line equipment, and in particular to a junction box and a power system. Background Art
[0002] The current power system attaches great importance to the reliable supply of electricity and the control of customer demands. When the traditional transformer bench maintenance work is carried out, the entire transformer bench needs to be shut down, and in order to ensure the safety of the maintenance personnel, prevent the sudden power supply of the power equipment on both sides, and reduce the influence of the induced voltage, it is necessary to install power grounding wires on both sides of the transformer bench. However, it is difficult to generate power through low-voltage lines after installing the power grounding wire, because the low-voltage lines are basically laid in a straight line. To connect the power generation vehicle cable, the straight section of the low-voltage line needs to be changed to a tension section before power generation can be carried out. This work is often cumbersome and time-consuming. In addition, the low-voltage line laying environment is complex and diverse, and a suitable location for parking the power generation vehicle is required to stop and generate electricity. These two problems have always restricted the timeliness and convenience of low-voltage power generation, resulting in low-voltage line power generation becoming a problem that plagues power companies during bench maintenance. Summary of the invention
[0003] The present disclosure aims to at least solve the technical problem in the prior art that it is difficult to generate power through a low-voltage line during stand maintenance.
[0004] To this end, an object of the present disclosure is to provide a junction box, which includes a box body, in which a first switch, a second switch and a third switch are arranged, one end of the first switch and one end of the second switch are respectively connected to a first input power supply, the other end of the first switch is connected to a first device through a first line, the other end of the second switch is connected to a second device through a second line, one end of the third switch is connected to the other end of the second switch, and the other end of the third switch is connected to a third device through a third line.
[0005] In some embodiments, the junction box further includes a fourth switch, and two ends of the fourth switch are respectively connected to the other end of the first switch and the other end of the second switch.
[0006] In some embodiments, the first switch and the first circuit, the second switch and the second circuit, and the third switch and the third circuit are connected by fasteners.
[0007] In some embodiments, the first device is a first load or a second input power source;
[0008] The second device is a second load or a third input power source;
[0009] The third device is a power generation device or a grounding wire.
[0010] In some embodiments, a temperature detection device and a current detection device are disposed in the box.
[0011] In some embodiments, an alarm device is disposed in the box, and the alarm device is connected to the temperature detection device.
[0012] In some embodiments, the alarm device is connected to the current detection device.
[0013] In some embodiments, the bottom of the box is provided with through holes for heat dissipation or drainage.
[0014] In some embodiments, at least one of the first switch, the second switch, the third switch, and the fourth switch is a knife switch.
[0015] Another object of the present disclosure is to provide a power system including the above-mentioned junction box.
[0016] In some embodiments, the power system further comprises:
[0017] A judgment module, used to judge the magnitude of the measured value of the temperature detection device and / or the current detection device and the corresponding preset threshold value;
[0018] The alarm module is used to issue an alarm message based on the judgment result of the judgment module.
[0019] The present disclosure provides a junction box and a power system, which have the following beneficial effects:
[0020] (1) The present disclosure sets a first switch, a second switch, a third switch and a fourth switch, which do not affect the power supply of the first device and the second device during the bench maintenance, effectively improving the power supply reliability of the power users. Different operation modes can be achieved through different combinations, which can meet various functional scenarios such as low-voltage power generation, phase adjustment, grounding, ring network connection, multi-power supply, etc., and are suitable for various operation requirements, thereby improving the flexibility of the junction box and having a wide range of applications;
[0021] (2) By monitoring the real-time data of the line's operating temperature and current, the real-time operating status of the line is ensured. At the same time, a preset threshold for the safe operation of the equipment is set. Once the preset threshold is exceeded, an alarm is triggered to improve the safety performance of the operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present disclosure 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 recorded in the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0023] Figure 1 is an internal wiring diagram of a junction box in an embodiment of the present disclosure;
[0024] Figure 2 It is a three-dimensional diagram of a junction box in an embodiment of the present disclosure.
[0025] Reference numerals:
[0026] 1. First switch; 2. Second switch; 3. Third switch; 4. Fourth switch; 5. First device; 6. Second device; 7. Third device; 8. Box; 9. First circuit; 10. Second circuit; 11. Third circuit; 12. Jack; 13. Through hole. DETAILED DESCRIPTION
[0027] Various aspects and features of the present disclosure are described herein with reference to the drawings.
[0028] It should be understood that various modifications may be made to the embodiments of the present application. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present disclosure will occur to those skilled in the art.
[0029] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.
[0030] These and other characteristics of the present disclosure will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.
[0031] It should also be understood that, although the present disclosure has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present disclosure that have the features described in the claims and are therefore within the scope of protection defined thereby.
[0032] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
[0033] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the embodiments claimed are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.
[0034] A first embodiment of the present disclosure provides a junction box, such as Figure 1 and Figure 2 As shown, the junction box includes a box body 8, in which a first switch 1, a second switch 2 and a third switch 3 are arranged, one end of the first switch 1 and one end of the second switch 2 are respectively connected to the first input power supply, the other end of the first switch 1 is connected to the first device 5 through a first line 9, the other end of the second switch 2 is connected to the second device 6 through a second line 10, one end of the third switch 3 is connected to the other end of the second switch 2, and the other end of the third switch 3 is connected to the third device 7 through a third line 11.
[0035] In addition, a third switch 3 is provided in the box 8, one end of the third switch 3 is connected to the second input power supply through the third line 11, the other end of the third switch 3 is connected to the second load through the fourth line, and one end of the second switch 2 is connected to the fourth line through the fifth line.
[0036] Here, the first device 5 is a first load, the second device 6 is a second load, and the third device 7 is a power generation device, such as a power generation vehicle. In addition, the first line 9 and the second line 10 are low-voltage wires.
[0037] Specifically, when the first switch 1 and the second switch 2 are connected, and the third switch 3 and the fourth switch 4 are disconnected, since three-phase power generation is adopted in this embodiment, a first loop is formed between the first input power supply and the first load, and a second loop is formed between the first input power supply and the second load, and the first input power supply supplies power to the first load and the second load. Here, the first input power supply is connected to the first load and the second load through a transformer, and the transformer plays a role of voltage regulation.
[0038] When the transformer rack needs to be shut down for maintenance, the first switch 1 and the second switch 2 are disconnected, the third switch 3 and the fourth switch 4 are connected, the generator car and the first load form a loop, and the generator car and the second load also form a loop. At this time, the generator car supplies power to the first load and the second load. Here, the first switch 1 and the second switch 2 are disconnected, so that there are obvious disconnection points between the first load side and the first input power side, and between the second load side and the first input power side. Then the cable of the generator car is connected, so that the power supply of the first load side and the second load side can be achieved while the transformer rack is shut down for maintenance without affecting the power supply, effectively improving the power supply reliability of electricity users.
[0039] When only the circuit between the first input power supply and the first load needs to be shut down for maintenance, the first switch 1, the second switch 2 and the fourth switch 4 are disconnected, and the third switch 3 is connected. The first input power supply and the first load, and the first input power supply and the second load are disconnected, and the generator car and the second load form a circuit. At this time, the generator car supplies power to the second load. Here, the first switch 1, the second switch 2 and the fourth switch 4 are disconnected, and the third switch 3 is connected, so that there is a clear disconnection point between the first load side and the first input power side. Then the cable of the generator car is connected, so that the power supply on the second load side will not be affected while the first load side is shut down for maintenance, effectively improving the power supply reliability of electricity users.
[0040] When it is necessary to generate electricity in a low-voltage substation under maintenance, the traditional way of connecting a low-voltage generator car to power generation is to directly connect the generator car's line to the low-voltage switch of the distribution box. However, when the stand is turned into a maintenance state as a whole, the distribution box of the stand cannot be connected to the generator car's cable, because the distribution box is also within the range of the stand turning into a maintenance state. In addition, some power generation methods that directly connect the generator car's cable to the low-voltage line will also be affected by the difficulty of the generator car to reach, the complicated and time-consuming procedures for connecting to the low-voltage wires for power generation, and other problems, resulting in the difficulty of connecting the generator car's wires, thereby failing to ensure the reliability of power supply. The present invention shortens the operation time of connecting a low-voltage power generation device (such as a generator car) by setting a junction box, and realizes rapid access to low-voltage detection, thereby improving power supply reliability.
[0041] The device optimizes the low-voltage conductor connection mode while meeting the application of various functional scenarios such as phase adjustment, power generation, grounding, and ring network connection. The above content realizes low-voltage power generation. In other embodiments, it is realized by adjusting the order in which the first switch 1 and the second switch 2 are connected to the first input power supply; in other embodiments, the structure of the first switch 1, the second switch 2, the third switch 3 and the fourth switch 4 can realize the grounding mode. In the grounding mode, unlike low-voltage power generation, the third device 7 is a grounding wire; in other embodiments, the structure of the first switch 1, the second switch 2, the third switch 3 and the fourth switch 4 can realize the ring network connection. In this mode, unlike low-voltage power generation, the first device 5 is the second power supply and the second device 6 is the third power supply. By changing the closing or disconnecting state of the first switch 1, the second switch 2, the third switch 3 and the fourth switch 4, the power transfer function between multiple power supplies is realized. The comprehensive design makes it suitable for various operation requirements, thereby improving the flexibility and applicability of switching in different scenarios.
[0042] In the prior art, when the low-voltage line (the first line 9 and the second line 10) is shut down for maintenance work, low-voltage grounding wires must be installed at both ends of the work site in accordance with work regulations. The traditional method of installing the low-voltage grounding wire is to clamp the wire end of the grounding wire in the anti-reverse power supply device or cut the insulation layer of the insulated wire and then add the low-voltage grounding wire. Since the anti-reverse power supply device was installed less in the early days and there were requirements for the installation location and quantity, some of the low-voltage grounding wires were installed using the second method of cutting the insulation layer of the insulated wire. Cutting the insulation layer of the wire to install the low-voltage grounding wire requires restoring the insulation of the wire after the work is completed. In the long run, this will damage the insulation function of the insulated wire, and also prolong the maintenance time, increasing the workload of the staff.
[0043] In this embodiment, the first switch 1 is connected to the first line 9, the second switch 2 is connected to the second line 10, and the third switch 3 is connected to the third line 11 through fasteners. The fasteners here are bolts, and the connection between multiple lines is achieved through fasteners, which simplifies the connection method of low-voltage insulated lines, facilitates operation, and greatly improves the reliability of power supply and the operating efficiency of power-related work.
[0044] In this embodiment, the box 8 is made of high-strength insulating material, the first switch 1, the second switch 2, the third switch 3 and the fourth switch 4 are knife switches, and the multiple switches are respectively arranged on the front and rear sides of the box 8. For example, the first switch 1 and the second switch 2 are arranged on one side, and the third switch 3 and the fourth switch 4 are arranged on the other side. Each switch is provided with a plurality of jacks 12, and the connection between the circuit and the switch is achieved by the fasteners cooperating with the jacks 12.
[0045] A through hole 13 is provided on the side or bottom of the box body 8, and the through hole 13 forms convection with the sockets 12 on each switch to achieve the purpose of heat dissipation. At the same time, water can be drained through the through hole 13 to avoid liquid accumulation in the box body 8 and affect the safety of electricity use.
[0046] The box body 8 has an openable door, and the structure inside the box body 8 can be easily inspected and repaired by opening and closing the door.
[0047] The box 8 does not require a large space to be installed, and can be flexibly installed on a stand pole, a stand outlet pole, or even any pole that can realize the ring network communication function. It is applicable to many scenarios and is easy and flexible to install.
[0048] Here, a temperature detection device and a current detection device are arranged in the box 8, which are used to detect the temperature or current of the circuit and other structures in the box 8. Specifically, the temperature sensor and the current sensor convert the temperature and current information inside the box 8 into electrical signals, transmit the electrical signals to the analog data processor of the power system, realize automatic information electrical signal output through single-chip microcomputer technology, and finally transmit the relevant information to the mobile phone of the power management or operation and maintenance department personnel through GPRS, realize real-time data interaction, introduce the real-time monitoring function of the line operation temperature and current, and ensure accurate monitoring of the line status. This helps to identify potential problems in advance, reduce the complexity of maintenance, and increase the reliability of power supply. In the case of changing the operating mode, the temperature and current information of the new and old operating states after changing the connection mode are monitored in real time, so that timely adjustments can be made according to the actual situation of the on-site operation. This solution has an information interaction function, and realizes information interaction between the operation and maintenance personnel and the intelligent junction box through data measurement and collection.
[0049] An alarm device is provided in the box 8, and the alarm device is connected to both the temperature detection device and the current detection device. When the monitoring device detects an abnormal situation, a prompt message can be issued, which enables the operation and maintenance team to understand the status in the box 8 in real time and respond quickly, thereby improving the response speed of operation and maintenance.
[0050] This embodiment obtains the temperature and current of the line in the box 8 through the temperature sensor and the current sensor, and transmits the information output by the analog measurement module to the mobile terminal of the operation and maintenance personnel through GPRS signal transmission, so as to realize the comprehensive monitoring and automatic alarm function of the temperature and current of the equipment. When the power generation vehicle is connected, the current of the line can be detected and the operation mode of power generation can be adjusted in time.
[0051] For example, a GWS-200 fiber Bragg grating temperature sensor with a range of -40°C to 120°C and a temperature measurement accuracy of ±0.5°C and a HOVD-05K52 fiber Hall current sensor with a working voltage of 15V and a range of -800-800A are selected.
[0052] A second embodiment of the present disclosure provides a power system, including the above-mentioned junction box, and the power system further includes:
[0053] The judgment module is used to judge the magnitude of the measured value of the temperature detection device and / or the current detection device and the corresponding preset threshold value.
[0054] The alarm module is used to issue an alarm message based on the judgment result of the judgment module.
[0055] The judgment module receives real-time power status data fed back by the temperature sensor and the current sensor. The preset threshold here refers to the current qualified value and temperature warning value and other data information preset in the data management platform. When the alarm module analyzes the information collected by the judgment module and finds that the current value collected by the current detection device reaches the current qualified value or the temperature value collected by the temperature sensor reaches the temperature warning value, an alarm message will be issued to conduct safe operation judgment of the power system and assist in real-time grasp of the substation situation.
[0056] The present invention is provided with a first switch 1, a second switch 2, a third switch 3 and a fourth switch 4, and different operating modes are realized through different combinations, which can meet various functional scenario applications such as low-voltage power generation, phase adjustment, grounding, ring network connection, multi-power supply, etc., and is suitable for various operation requirements, thereby improving the flexibility and applicability of switching for use in different scenarios.
[0057] In the description of the present disclosure, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present disclosure.
[0058] In the description of the present disclosure, "first feature" or "second feature" may include one or more of the features.
[0059] In the description of the present disclosure, “plurality” means two or more.
[0060] In the description of the present disclosure, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.
[0061] In the description of the present disclosure, “on”, “over” and “above” a first feature of a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
[0062] In the description of the present disclosure, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0063] Although embodiments of the present disclosure have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.
Claims
1. A junction box, characterized in that: The invention comprises a box body, wherein a first switch, a second switch and a third switch are arranged in the box body, one end of the first switch and one end of the second switch are respectively connected to a first input power supply, the other end of the first switch is connected to a first device through a first line, the other end of the second switch is connected to a second device through a second line, one end of the third switch is connected to the other end of the second switch, and the other end of the third switch is connected to a third device through a third line.
2. A junction box according to claim 1, characterized in that: The junction box further includes a fourth switch, and two ends of the fourth switch are respectively connected to the other end of the first switch and the other end of the second switch.
3. A junction box according to claim 2, characterized in that: The first switch and the first circuit, the second switch and the second circuit, and the third switch and the third circuit are connected by fasteners.
4. A junction box according to claim 2, characterized in that: The first device is a first load or a second input power source; The second device is a second load or a third input power source; The third device is a power generation device or a grounding wire.
5. The junction box according to claim 1, characterized in that: A temperature detection device and a current detection device are arranged in the box.
6. A junction box according to claim 5, characterized in that: An alarm device is arranged in the box, and the alarm device is connected to the temperature detection device, and / or The alarm device is connected to the current detection device.
7. The junction box according to claim 1, characterized in that: The bottom of the box body is provided with through holes for heat dissipation or water drainage.
8. A junction box according to claim 2, characterized in that: At least one of the first switch, the second switch, the third switch and the fourth switch is a knife switch.
9. A power system, characterized in that: The invention comprises the junction box according to any one of claims 1 to 8.
10. A power system according to claim 9, characterized in that: Also includes: A judgment module, used to judge the magnitude of the measured value of the temperature detection device and / or the current detection device and the corresponding preset threshold value; The alarm module is used to issue an alarm message based on the judgment result of the judgment module.