Open-circuit-prevention protection device and live-line installation method

Abstract

The invention discloses an open circuit prevention protection device and a live installation method, and the device comprises an open circuit prevention protection module which is used for detecting and rapidly responding to the abnormal overvoltage of the secondary side of a current transformer, and eliminating the high voltage; and the compatible aviation socket is used for being connected with a complete set of switches / terminals to realize plug and play of equipment. According to the invention, the technical problems that the power supply reliability is reduced and the operation is relatively tedious due to the fact that the automatic control equipment is overhauled and replaced in a power-off installation mode in the prior art are solved.

Description

Technical Field

[0001] The present invention belongs to the field of electrical technology, and in particular, relates to an anti-open circuit protection device and a live installation method. Background Art

[0002] In the power system, the function of the current transformer CT is to convert a large current into a specified small current. This device is widely used in current measurement, control and protection of primary lines, and is an indispensable supporting component for ammeters, watt-hour meters and current control systems. When the CT is working normally, the secondary side is in a state of approximate short circuit and the output voltage is very low. However, if the secondary winding is open or an abnormal current flows through the primary winding during operation, such as lightning current, resonant overcurrent, capacitor charging current, inductor starting current, primary load short-circuit current, etc., high voltage will be generated on the secondary side. This is mainly because the current on the primary side of the current transformer is determined by the number of primary turns. When the secondary side is open, the current is zero. If the power is to be maintained equal, the voltage can only be increased infinitely until the core is saturated. In other words, if the secondary circuit of the current transformer is open, a high peak voltage of several thousand volts to tens of thousands of volts will be generated on the secondary side, which will not only harm the insulation of the secondary system, but also cause the CT to overexcite and damage the transformer and the measuring instruments connected to it. It may even endanger the lives of the staff. Therefore, the secondary side of the current transformer cannot be open, which is also the hazard of the secondary side open circuit.

[0003] The CT pole-mounted automation equipment currently in operation has no open circuit protection. Every time the automation control equipment is inspected and replaced, it is necessary to use the power outage and line disconnection installation method. This power outage installation method reduces the power supply reliability and is more cumbersome to operate. Summary of the invention

[0004] The embodiments of the present invention provide an open circuit protection device and a live installation method to at least solve the technical problems in the related art that the maintenance and replacement of automation control equipment through power outage installation reduces the power supply reliability and the operation is relatively cumbersome.

[0005] According to the first aspect of an embodiment of the present invention, an open circuit protection device is provided: comprising an open circuit protection module, which is used to detect and quickly respond to abnormal overvoltage on the secondary side of the current transformer to eliminate high voltage; and is compatible with an aviation socket, which is used to connect to a complete set of switches / terminals to achieve plug-and-play of the equipment.

[0006] Preferably, the size parameters of the anti-open circuit protection device include a height of 300 mm, a width of 200 mm, and a depth of 120 mm, so that the device can adapt to specific installation space requirements.

[0007] Preferably, the starting voltage Vp value of the anti-open circuit protection module is about 33V, ensuring that it can respond in time when an abnormal overvoltage occurs on the secondary side of the current transformer.

[0008] Preferably, the performance indicators such as leakage current less than 10uA, on-resistance less than 10mΩ, maximum long-term withstand current 10A, short-time withstand current 50A / 10S, etc., improve the reliability and safety of the device.

[0009] Preferably, the anti-open circuit protection module adopts a semiconductor switch, which can respond quickly when abnormal overvoltage is detected and effectively eliminate the high voltage.

[0010] Preferably, the compatible aviation sockets include a current aviation socket, a control aviation socket and a 26-core aviation socket, which are respectively used to transmit current, control signals and data signals to ensure accurate transmission of signals between devices.

[0011] Preferably, the pin functions of the aviation socket are defined in accordance with standards, supporting quick connection with a variety of electrical devices, thereby improving the compatibility and installation efficiency of the equipment.

[0012] Preferably, the device also includes a status indicator light for intuitively displaying the working status of the device, facilitating on-site operator inspection and maintenance.

[0013] According to the second aspect of an embodiment of the present invention, a live-working installation method is also provided, comprising: using special wire strippers to strip the insulation layer of the current cable and perform short-circuit protection without power outage, then removing the cable from the original terminal block and aviation socket, and installing the entire cable on an anti-open-circuit protection device to complete the live replacement or upgrade of the equipment.

[0014] According to a third aspect of an embodiment of the present invention, there is also provided an electronic device, comprising a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the installation method for live working as described in any embodiment of the second aspect above.

[0015] According to a fourth aspect of an embodiment of the present invention, a non-volatile storage medium is further provided, in which a computer program is stored, wherein the computer program is configured to execute detection of abnormal overvoltage on the secondary side of a current transformer when running on a computer or a processor; when an open circuit or abnormal overcurrent is detected on the secondary side of the current transformer, an anti-open circuit protection module is controlled to quickly turn on the secondary side of the current transformer to eliminate the high voltage.

[0016] According to a fifth aspect of an embodiment of the present invention, there is also provided a computer program product, comprising a computer program, which, when executed by a processor, implements the installation method for live working as described in any embodiment of the second aspect above.

[0017] In the embodiment of the present invention, by adopting advanced semiconductor switch technology and optimized electrical design, the safety protection level of the secondary side of the current transformer is significantly improved. Its rapid response capability and high-voltage elimination function effectively avoid equipment damage and system failures caused by open circuit or abnormal overcurrent, and ensure the stable operation of the power system. At the same time, the plug-and-play aviation socket design and the installation method of live operation greatly simplify the installation and maintenance process of the equipment, reduce the operation risk, and improve work efficiency, thereby solving the technical problems in the related technology that the maintenance and replacement of the automation control equipment through the power outage installation method reduces the power supply reliability and the operation is relatively cumbersome. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 is a schematic structural diagram of an anti-open circuit protection device according to one embodiment of the present invention;

[0020] Figure 2 is an equivalent schematic diagram of an anti-open circuit module according to one embodiment of the present invention;

[0021] Figure 3 is an example diagram of an aviation plug interface definition according to one embodiment of the present invention;

[0022] Figure 4 It is an implementation example diagram of an installation method for live working according to one embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Reference Figure 1 and Figure 2 According to an embodiment of the present invention, an embodiment of an open circuit protection device is provided, comprising:

[0026] The anti-open circuit protection module is used to detect and quickly respond to abnormal overvoltage on the secondary side of the current transformer to eliminate high voltage; it is compatible with aviation sockets and is used to connect to complete sets of switches / terminals to achieve plug-and-play of equipment. This design not only improves the safety of the secondary side of the current transformer and prevents the risk of high voltage caused by open circuits, but also enables rapid deployment and maintenance in scenarios that require current detection and protection, such as power systems, industrial automation control, and rail transit, greatly improving the reliability and maintenance efficiency of the system.

[0027] Preferably, the size parameters of the electrical cabinet include 300 mm in height, 200 mm in width, and 120 mm in depth, so that the device can adapt to specific installation space requirements. This compact design is particularly suitable for electrical cabinets with limited space, such as substations, distribution rooms, factory production line control cabinets, etc., ensuring the installation flexibility and applicability of the device and reducing the need to adjust the existing layout.

[0028] Preferably, the starting voltage Vp value of the anti-open circuit protection module is around 33V to ensure timely response when abnormal overvoltage occurs on the secondary side of the current transformer. This precise voltage threshold setting is suitable for secondary side protection of various current transformers, and can take prompt action when power system failures occur, such as grid fluctuations, equipment aging, etc., to prevent high voltage from causing damage to equipment and personnel.

[0029] Preferably, the leakage current is less than 10uA, the on-resistance is less than 10mΩ, the maximum long-term withstand current is 10A, and the short-time withstand current is 50A / 10S, which improves the reliability and safety of the device. These high-standard electrical performances enable it to operate stably in high-current and high-frequency working environments such as power systems, rail transit signal control, and industrial automation equipment, effectively protecting the equipment from damage caused by abnormal current, and ensuring the continuous operation of the system and the safety of personnel.

[0030] Preferably, the open circuit protection module uses a semiconductor switch, which can respond quickly when abnormal overvoltage is detected and effectively eliminate high voltage. The application of semiconductor switch technology enables the response speed of the protection device to reach milliseconds, which is suitable for occasions requiring fast protection, such as transient protection of power systems, current control of precision electronic equipment, etc., ensuring that high voltage is eliminated in the shortest time and protecting the safety of equipment and systems.

[0031] Preferably, the compatible aviation sockets include current aviation sockets, control aviation sockets and 26-core aviation sockets, which are used to transmit current, control signals and data signals respectively, to ensure accurate transmission of signals between devices. This multifunctional aviation socket design is suitable for complex systems that need to transmit multiple signals at the same time, such as remote monitoring of power systems, control and data acquisition of industrial automation equipment, etc., which improves the stability and accuracy of signal transmission and enhances the overall performance of the system.

[0032] Specifically, the pin definitions of the current aviation socket, control aviation socket and 26-core aviation socket are as follows: Figure 3 shown.

[0033] Preferably, the pin functions of the aviation socket are defined in accordance with the standard, supporting quick connection with a variety of electrical devices, improving the compatibility and installation efficiency of the equipment. The pin functions defined in the standard enable the device to be seamlessly connected to existing electrical systems, such as power systems, industrial automation, rail transit, etc., simplifying the installation and commissioning process of the equipment, reducing maintenance costs, and improving the operating efficiency of the system.

[0034] Preferably, the device also includes a status indicator light for intuitively displaying the working status of the device, which is convenient for on-site operators to check and maintain. The addition of the status indicator light enables on-site operators to monitor the status of the equipment in real time, such as power system maintenance, industrial equipment overhaul, etc., to promptly discover and deal with potential problems, enhance the safety and reliability of the system, reduce downtime, and improve production efficiency.

[0035] According to an embodiment of the present invention, an embodiment of an installation method for live working is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system containing at least one set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0036] The method embodiment can also be executed in an electronic device including a memory and a processor, a similar control device or a cloud. Taking an electronic device as an example, the electronic device may include one or more processors and a memory for storing data. Optionally, the electronic device may also include a communication device and a display device for communication functions. It can be understood by those of ordinary skill in the art that the above structural description is only illustrative and does not limit the structure of the above electronic device. For example, the electronic device may also include more or fewer components than the above structural description, or have a configuration different from the above structural description.

[0037] The processor may include one or more processing units. For example, the processor may include a central processing unit (CPU), a graphics processing unit (GPU), a digital signal processing (DSP) chip, a microcontroller unit (MCU), a field-programmable gate array (FPGA), a neural network processor (NPU), a tensor processing unit (TPU), an artificial intelligence (AI) type processor, and the like. Among them, different processing units may be independent components or integrated into one or more processors. In some instances, the electronic device may also include one or more processors.

[0038] The memory can be used to store computer programs, such as storing a computer program corresponding to the installation method for live working in an embodiment of the present invention. The processor implements the above-mentioned automatic guided vehicle scheduling method based on intelligent management and control by running the computer program stored in the memory. The memory may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory may further include a memory remotely arranged relative to the processor, and these remote memories can be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0039] The communication device is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the communication device includes a network adapter (network interface controller, NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the communication device can be a radio frequency (radio frequency, RF) module, which is used to communicate with the Internet wirelessly. In some embodiments of the present solution, the communication device is used to connect to mobile devices such as mobile phones and tablets, and instructions can be sent to electronic devices through the mobile device.

[0040] The display device may be a touch screen type liquid crystal display (LCD) and a touch display (also referred to as a "touch screen" or "touch display screen"). The liquid crystal display may enable a user to interact with a user interface of the electronic device. In some embodiments, the electronic device has a graphical user interface (GUI), and a user may interact with the GUI by touching a finger release and / or gestures on a touch-sensitive surface, and executable instructions for executing the above-mentioned human-computer interaction functions are configured / stored in a computer program product or a readable storage medium executable by one or more processors.

[0041] Figure 4 An implementation example diagram of the installation method for live working according to one embodiment of the present invention is shown in FIG. Figure 4 As shown, the method comprises the following steps:

[0042] Use special wire strippers to strip the insulation layer of the current cable and perform short-circuit protection without power outage, then remove the cable from the original terminal block and aviation socket, and install the whole on the anti-open circuit protection device to complete the live replacement or upgrade of the equipment. This method is particularly suitable for online maintenance and upgrades in power systems, such as substations and distribution rooms. Equipment can be replaced or upgraded without power outage, which greatly reduces the operation risk, improves maintenance efficiency, and reduces the impact on the normal operation of the power system.

[0043] It should be noted that the device of the present invention can upgrade, transform, and eliminate faults in a large number of existing primary and secondary distribution automation equipment without CT open circuit protection without power outage, which greatly facilitates subsequent maintenance work, reduces the number of households affected by power outages in the distribution network, improves power supply reliability, and has great social and economic benefits.

[0044] This device has a built-in open circuit protection module, which is mainly used for abnormal overvoltage protection on the secondary side of various CTs. The protection device is connected in parallel to both ends of the CT secondary winding. During normal operation, the protection device is in a high-resistance state due to the extremely small leakage current. When the CT secondary circuit is open or an abnormal overcurrent occurs in the primary winding, the internal control device of the protection device will quickly turn on, short-circuit the CT secondary side to eliminate the high voltage and provide protection. After the fault is eliminated, the circuit returns to its original state. At this time, the protector does not need to be manually reset, the internal control device is cut off and in a high-resistance state, and the transformer can be put into normal operation again.

[0045] In summary, the present anti-open circuit protection device and method not only realizes effective protection of the secondary side of the current transformer in technology, but also improves the equipment safety and operation efficiency in the fields of power system, industrial automation, rail transit, etc. through optimized electrical design and intelligent control program in practical application. Its compact design, fast response capability, high electrical performance, multi-function aviation socket, status indicator light and installation method for live working together build an efficient, safe and reliable current protection solution, which is suitable for various complex working environments and application scenarios, and provides a strong guarantee for the stable operation of the power system.

[0046] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), including a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present invention.

[0047] In this embodiment, an automatic guided vehicle scheduling system based on intelligent management and control is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. As used below, the term "module" is a combination of software and / or hardware that can implement a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0048] An embodiment of the present invention also provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the automatic guided vehicle scheduling method based on intelligent control described in any of the above embodiments.

[0049] Optionally, in this embodiment, the processor in the above electronic device may be configured to run a computer program to perform the following steps:

[0050] Use special wire strippers to strip the insulation layer of the current cable and perform short-circuit protection without powering off. Then remove the cable from the original terminal block and aviation socket, and install the whole cable on the anti-open circuit protection device to complete the live replacement or upgrade of the equipment.

[0051] An embodiment of the present invention also provides a non-volatile storage medium, in which a computer program is stored, wherein the computer program is configured to execute the automatic guided vehicle scheduling method based on intelligent control described in any of the above embodiments when running on a computer or processor.

[0052] Optionally, in this embodiment, the above-mentioned computer program may be configured to store a computer program for performing the following steps:

[0053] Use special wire strippers to strip the insulation layer of the current cable and perform short-circuit protection without powering off. Then remove the cable from the original terminal block and aviation socket, and install the whole cable on the anti-open circuit protection device to complete the live replacement or upgrade of the equipment.

[0054] An embodiment of the present invention further provides a computer program product, including a computer program, which, when executed by a processor, implements the automatic guided vehicle scheduling method based on intelligent management and control described in any of the above embodiments.

[0055] Optionally, in this embodiment, the above computer program implements the following steps when executed by a processor:

[0056] Use special wire strippers to strip the insulation layer of the current cable and perform short-circuit protection without powering off. Then remove the cable from the original terminal block and aviation socket, and install the whole cable on the anti-open circuit protection device to complete the live replacement or upgrade of the equipment.

[0057] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0058] In some embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the modules can be a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, modules or indirect coupling or communication connection of modules, which can be electrical or other forms.

[0059] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0060] In addition, each functional module in each embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of software functional modules.

[0061] If the integrated module is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An anti-open circuit protection device, characterized in that: include: The open circuit protection module is used to detect and quickly respond to abnormal overvoltage on the secondary side of the current transformer to eliminate high voltage. It is compatible with aviation sockets and is used to connect to complete sets of switches / terminals to achieve plug-and-play of equipment.

2. The anti-open circuit protection device according to claim 1, characterized in that: The size parameters of the anti-open circuit protection device include a height of 300 mm, a width of 200 mm, and a depth of 120 mm.

3. The anti-open circuit protection device according to claim 1, characterized in that: The starting voltage Vp value of the anti-open circuit protection module is 33V.

4. The anti-open circuit protection device according to claim 1, characterized in that: include: The anti-open circuit protection module has a leakage current less than 10uA, an on-resistance less than 10mΩ, a maximum long-term withstand current of 10A, and a short-time withstand current of 50A / 10S.

5. The anti-open circuit protection device according to claim 1, characterized in that: The anti-open circuit protection module adopts a semiconductor switch.

6. The anti-open circuit protection device according to claim 1, characterized in that: The compatible aviation sockets include a current aviation socket, a control aviation socket and a 26-core aviation socket, which are used for transmitting current, control signals and data signals respectively.

7. The anti-open circuit protection device according to claim 1, characterized in that: The pin functions of the aviation socket are defined in accordance with standards, supporting quick connection with a variety of electrical devices.

8. The anti-open circuit protection device according to claim 1, characterized in that: A status indicator light is also included to display the working status of the device.

9. A live installation method, characterized in that: Use wire strippers to strip the insulation layer of the current cable and perform short-circuit protection without power outage, then remove the cable from the original terminal block and aviation socket, and install it on the anti-open circuit protection device described in any one of claims 1-8.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by the processor, the following steps are implemented: detecting abnormal overvoltage on the secondary side of the current transformer; when an open circuit or abnormal overcurrent is detected on the secondary side of the current transformer, controlling the anti-open circuit protection module to quickly turn on the secondary side of the current transformer to eliminate the high voltage.

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