Holographic sensing intelligent protection measurement and control device for switch cabinet and control method

Abstract

The invention relates to a holographic sensing intelligent protection measurement and control device for a switch cabinet and a control method, and belongs to the technical field of switch cabinets. The system at least comprises a display module and / or a logic module and further comprises a master module. The display module comprises a first aluminum alloy shell, a guide groove and a locking structure are arranged on the back face and the lower face of the first aluminum alloy shell respectively, and the first aluminum alloy shell can be rapidly combined and connected with the logic module and the master module respectively; the logic module comprises a second aluminum alloy shell, the back face of the second aluminum alloy shell is provided with a guide groove and a locking structure, and the second aluminum alloy shell can be rapidly combined and connected with the display module. And the master module comprises a third aluminum alloy shell, the back surface and the side surface of the third aluminum alloy shell are respectively provided with a guide groove, a locking structure and a third quick plug interface, and the third aluminum alloy shell can be quickly combined and connected with the display module in structure and electrical. The problem that repeated secondary wiring of multiple terminal devices in an existing switch cabinet is complex is solved, and the flexibility of secondary control is improved.

Description

Technical Field

[0001] This invention belongs to the field of switchgear technology, and particularly relates to a holographic sensing intelligent protection and control device and control method for switchgear. Background Technology

[0002] Most of the existing intelligent high-voltage switchgear is based on the traditional switchgear's relay protection devices, intelligent control devices, and digital display instruments. It adds online temperature measurement devices, partial discharge measurement sensors, and mechanical characteristic sensors, or modifies the chassis and grounding switch to electric actuators. By gradually adding intelligent devices, it "pieces together" intelligent high-voltage switchgear with multiple terminal devices and multiple auxiliary monitoring indicators.

[0003] For example, patent application number 2020102937283 discloses an integrated holographic sensing intelligent terminal device for switchgear, comprising a local monitoring board, an intelligent control terminal, a chassis controller, and a server. The local monitoring board is equipped with a monitoring intelligent module that integrates data acquisition, analysis, processing, curve and spectrum uploading from a three-in-one sensor (UHF, ground wave, and ultrasonic). This monitoring intelligent module is connected to the signals of the UHF sensor, ground wave sensor, and ultrasonic sensor to solve the diagnosis of insulation faults. However, this device has significant drawbacks: First, the secondary wiring of high-voltage switchgear becomes increasingly complex with the increase in the number of protection devices, measuring devices, and control devices, leading to more secondary line fault points. Second, multiple devices, sensors, and systems use different algorithms and logic outputs, failing to form a unified sensing standard and a single alarm protection output. This increases the workload of maintenance personnel and disperses critical information on the operation of high-voltage switchgear, hindering the development, application, and life-cycle maintenance of high-voltage switchgear.

[0004] By integrating simple components into switchgear, and through information exchange between distributed sensor data acquisition and monitoring boards or intelligent modules, fault diagnosis can be provided. Currently, there are no issues regarding how to integrate protection functions, how to acquire data, how to perform logical calculations, and how to unify the output of core-based monitoring boards. Summary of the Invention

[0005] To address the shortcomings of the prior art, this invention provides a holographic sensing intelligent protection and control device for switchgear. By integrating protection and control and reusing input signals, it reduces the secondary complexity caused by repeated electrical wiring of multiple terminal devices in existing switchgear. It improves the reliability and convenience of switchgear operation and maintenance by acquiring signals from different sources and using a unified alarm trip output. It also provides flexibility for secondary control of the switchgear through various structural combinations.

[0006] A holographic sensing intelligent protection and control device for switchgear includes at least a display module and / or a logic module, and also includes a master module; The display module includes a first aluminum alloy shell, with guide grooves and locking structures respectively provided on the back and bottom of the first aluminum alloy shell, which can be quickly combined and connected with the logic module and the master module respectively; The logic module includes a second aluminum alloy shell, the back of which is provided with a guide groove and a locking structure, which can be quickly combined and connected with the display module. The master module includes a third aluminum alloy shell, with guide grooves, locking structures, and a third quick-connect interface respectively provided on the back and sides of the third aluminum alloy shell, which can be quickly combined and connected with the display module in terms of structure and electrical connection.

[0007] Preferably, the display module further includes two first quick-connect interfaces, a touch screen, a light-emitting diode, a speaker, and a driver circuit board. The touch screen, light-emitting diode, and speaker are embedded in the front of the first aluminum alloy housing and electrically connected to the driver circuit board installed inside the first aluminum alloy housing. The driver circuit board is also electrically connected to the first quick-connect interfaces installed on the side of the first aluminum alloy housing.

[0008] Preferably, the display module has 5 LEDs, 1 speaker, and 1 seven-inch touchscreen.

[0009] Preferably, the logic module further includes a second quick-connect interface and multiple functional plug-ins. The functional plug-ins are embedded in the second aluminum alloy housing through guide grooves inside the second aluminum alloy housing, and the multiple functional plug-ins are electrically connected through a common interface conversion board. The second quick-connect interface is located on the side of the second aluminum alloy housing.

[0010] Preferably, the logic module has seven functional plug-ins.

[0011] Preferably, the master control module further includes a circuit breaker indicator light, a circuit breaker changeover switch, an energy storage knob, an energy storage indicator light, a protection pressure plate, and a proximity switch. The circuit breaker indicator light, the energy storage indicator light, the circuit breaker changeover switch, the energy storage knob, and the protection pressure plate are embedded in the front of the third aluminum alloy housing, and the proximity switch is located above the protection pressure plate.

[0012] Preferably, the switchgear holographic perception intelligent protection and control device participates in logical judgment through dual information acquisition from different sources; the online perception, control and protection are integrated and adopt a unified trip alarm output and multiplexed input signals.

[0013] Preferably, different source voltage signals are acquired: the AC quantity function plug-in of the logic module is equipped with a voltage input signal acquisition channel from the switchgear bus PT and a voltage signal acquisition channel from the switchgear high voltage sensor; the acquired different source voltage signals are logically processed and used as the criterion for voltage signal measurement and protection logic, and can also serve as a dual input information source for overvoltage and undervoltage protection logic in the switchgear integrated protection, as well as the circuit breaker opening and closing status associated with sequential control action; Different source pressure plate signal acquisition: The switch function plug-in of the logic module of the device is equipped with a voltage acquisition channel from the pressure plate input and an acquisition channel from the proximity switch above the pressure plate; the acquired different source pressure plate signals are logically processed and used as the acquisition and input judgment of pressure plate signals, serving as a dual input information source for the control loop disconnection logic.

[0014] Preferably, different source working / test position acquisition: The switch quantity function plug-in of the logic module of the device is equipped with acquisition channels from the working / test auxiliary points of the circuit breaker chassis and acquisition channels from two sets of micro switches on the secondary guard plate of the circuit breaker compartment of the switchgear; the acquired working / test position signals from different sources are logically processed and used as the acquisition and input source of the working and test position information of the switchgear circuit breaker trolley, and as the dual input information source of the five-proof interlock and sequential control action of the switchgear; Different source circuit breaker position acquisition: The switch quantity function plug-in of the logic module is equipped with an acquisition channel from the auxiliary contacts of the circuit breaker and the mechanical characteristic function plug-in of the logic module is equipped with an acquisition channel from the angular displacement sensor on the main shaft of the circuit breaker; the acquired different source circuit breaker position signals are logically processed and used as the acquisition and input of the circuit breaker opening / closing status, and as a dual input information source for the five-proof interlock and sequential control action of the switch cabinet.

[0015] A control method for a holographic sensing intelligent protection and control device for switchgear includes the following combined steps: The display module, logic module, and master module are combined. The display module is structurally and electrically connected to the master module through a guide groove, locking structure, and a first quick-connect interface on the side. The display module is also structurally and electrically connected to the logic module through a guide groove, locking structure, and another quick-connect interface on the side. The display module, logic module, and master module are integrated into one unit. Alternatively, the display module and the logic module are combined, with the display module installed on the instrument door of the switch cabinet and the logic module installed in the instrument room of the switch cabinet. A first quick-connect interface of the display module and a second quick-connect interface of the logic module are connected by a prefabricated wire. Alternatively, the master control module and display module can be combined and then connected to the logic module. The master control module and display module can be installed on the instrument door, with the master control module and display module connected as a single unit. The logic module can be installed in the instrument room of the switchgear. The third quick-connect interface of the master control module and one of the first quick-connect interfaces of the display module are connected by a prefabricated cable. Then, the display module is connected to the second quick-connect interface of the logic module installed inside the switchgear via another first quick-connect interface, also via a prefabricated cable. Alternatively, the master control module and the logic module can be combined. The master control module is installed on the instrument door of the switchgear, and the logic module is installed in the instrument room of the switchgear. The third quick-connect interface of the master control module and the second quick-connect interface of the logic module are connected by prefabricated wires.

[0016] Beneficial technical effects: 1. The equipment body adopts a combinable and distributable structural design and electrical quick-connect interface, which can be used in the context of partial renovation, overall renovation and new construction of switch cabinets through plug-and-play and flexible combination. According to the combination form, it can realize three application forms: full integration, distributed measurement and display + main control + data acquisition, and simple integration of measurement and display + integration. Compared with traditional integrated and split protection devices, this device is more flexible in application, and one device is suitable for more scenario needs, forming a standardized solution.

[0017] 2. The device uses dual information acquisition from different sources, such as power and switch signals, to participate in logical judgment. Compared with traditional measurement and control protection devices that use a single input signal, the device uses dual signal acquisition from different sources and logical operations, which can improve the safety and reliability of switchgear operation. 3. Each functional plug-in inside the device converts external signals into weak digital signals through its own circuit design. Through modular plug-in circuit design and the combination of power conversion common unit, it realizes the multiplexing of input signals for measurement, display, sequential control and protection and adopts a unified trip alarm output. It realizes hot plugging and position interchange of functional plug-ins. Compared with the traditional separate design of protection device and measurement and control device, it can simplify the secondary wiring of switch cabinet.

[0018] 4. This solution enables a single device to cover all the functions of the switchgear, including measurement, display, sequential control, and protection. Compared to the traditional solution that uses multiple terminals to achieve the above functions, this solution only requires one wiring design for AC signals, switch signals, and non-electrical signals. It eliminates the need to repeatedly connect to multiple terminals and achieves the full functionality of the switchgear with minimal wiring through the internal circuitry and signal sharing unit of the device.

[0019] 5. A hardware device can meet the needs of different scenarios such as partial renovation (minor rewiring), overall renovation (major rewiring), and new construction (new manufacturing of switchgear) of existing substation switchgear through different distributed and integrated combinations, as well as meet the requirements of conventional KYN air insulation system and SF6 (environmentally friendly) gas insulation series high voltage switchgear cabinets currently on the market.

[0020] 6. It enables standardized processing and joint participation in logical judgment of electrical and non-electrical signals from different sources and acquisition methods within the device, making the judgment of the position, power, and other status of switching equipment more accurate and reliable.

[0021] 7. Enable the reduction and expansion of hardware device functional units, as well as the flexibility of configurable, replaceable, and hot-swappable functional plug-in positions. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of a first combination of device hardware according to an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of a second combination of device hardware according to an embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of a third combination of device hardware according to an embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the logic for acquiring data from a non-single source for a switch cabinet with / without power, according to an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the pressure plate closing / opening - non-single-source data acquisition logic in an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the workstation / test location data acquisition logic of an embodiment of the present invention, which is not based on a single source.

[0028] Figure 7 This is a schematic diagram of the circuit breaker location - non-single-source data acquisition logic in an embodiment of the present invention.

[0029] Figure 8 This is a schematic diagram of seven configurable functional plug-ins of the device module in an embodiment of the present invention.

[0030] Figure 9This is a schematic diagram of the power conversion board of the device module in an embodiment of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0032] It should be noted that, in this document, 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. Unless otherwise specified, 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 that element.

[0033] Example 1 Implementation Case Studies Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9 .

[0034] like Figure 1 As shown, the switchgear holographic perception intelligent protection and control device and control method consists of three modules, including display module 2; logic module 1; and master command module 3.

[0035] Display module 2 mainly comprises an aluminum alloy housing 24; quick-connect interfaces 14 and 15; a 7-inch touchscreen 22; five LEDs 20; a speaker 21; and a portion of the aforementioned driver circuit board. The 7-inch touchscreen, five LEDs, and speaker are embedded in the front of the aluminum alloy housing and electrically connected to the driver circuit board installed inside the housing. The driver circuit board is also electrically connected to one end of the quick-connect interfaces 14 and 15 on the side of the aluminum alloy housing 24. The back and bottom of the aluminum alloy housing 24 are provided with guide grooves and locking structures 18 and 26, respectively, which allow for quick structural connection with logic module 1 and master module 3.

[0036] The logic module 1 mainly includes an aluminum alloy housing 23, 28; a quick-connect interface 16; and multiple functional plug-ins 27. Optionally, it contains seven functional plug-ins. The functional plug-ins are embedded in the aluminum alloy housing through guide grooves inside the aluminum alloy housing. The multiple functional plug-ins are electrically connected through a common interface conversion board 31. The back of the aluminum alloy housing is provided with guide grooves and a locking structure, and the side is provided with quick-connect interface 16, which can be quickly combined and connected with the display module 2 in terms of structure and electricity.

[0037] The master control module 3 mainly consists of an aluminum alloy housing 25; a quick-connect interface 13; circuit breaker indicator lights 11 and 12; a circuit breaker changeover switch 8; an energy storage knob 9; an energy storage indicator light 10; a protection pressure plate 6 and 7; and corresponding proximity switches 4 and 5. The circuit breaker indicator lights, energy storage indicator lights, circuit breaker changeover switch, energy storage knob, and protection pressure plate are embedded on the front of the aluminum alloy housing. A proximity switch is also provided directly above the protection pressure plate. The back and sides of the aluminum alloy housing are respectively provided with guide grooves 26, locking structures, and quick-connect interfaces 13, which can be quickly combined and connected with the display and control module in terms of structure and electrical aspects.

[0038] Depending on the application scenario or type of the switchgear, the three modules can be used in any combination. Specific applications and combination forms of the three modules include: The first combination is a combination of a display module, a logic module, and a master control module. The display module is structurally and electrically connected to the master control module through its lower guide groove, locking structure, and side quick-connect interface. Similarly, the display module is structurally and electrically connected to the logic module through its rear guide groove, locking structure, and side quick-connect interface. The display module, logic module, and master control module are integrated into one unit. This combination method can quickly realize the layout and installation of the instrument door of the air-insulated switchgear and is suitable for applications such as partial protection of switchgear and secondary modification of measurement and control.

[0039] The second combination is a display module + logic module combination. This mode uses a split, prefabricated quick-connect cable connection. The display module is installed on the switchgear instrument door, and the logic module is installed in the switchgear instrument compartment. The modules are connected via prefabricated cables to the quick-connect interfaces 15 and 16. This combination allows for applications where a master switch is not required, and sequential control is performed via a touchscreen. It is suitable for the industrialization of newly developed intelligent switchgear and the comprehensive renovation of older switchgear. The third combination: a master control module and a display module combined with a logic module. This mode uses a split, prefabricated quick-connect wiring method. The master control module and display module are installed on the instrument door, connected as a single unit. The logic module is installed in the switchgear instrument compartment. The master control module and display module are connected on the instrument door via quick-connect interfaces 13 and 14; then the display module is electrically connected to the logic module installed inside the switchgear via quick-connect interfaces 15 and 16. This is suitable for switchgear applications requiring comprehensive upgrades. The fourth combination is a master module + logic module. In this mode, a split prefabricated quick-connect method is used. The master module is installed on the instrument door of the switch cabinet, and the logic module is installed in the instrument room of the switch cabinet. This combination can realize the application scenario of the display module being operated through the master switch. It is suitable for gas-insulated metal-enclosed switchgear and miniaturized ring main unit products on the market.

[0040] The four different combination forms can cover the protection, sensing and measurement and control function requirements of different types and application scenarios, making the application more flexible and the transformation more convenient.

[0041] The device improves operational safety and reliability by incorporating dual information acquisition from different sources into logical judgments.

[0042] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7 The explanation is as follows: The input signals of the switchgear holographic perception intelligent protection and control device and control method are acquired from different sources, specifically including voltage signals, pressure plate signals, handcart position signals, and circuit breaker position signals. It can be understood that "&" means logical AND and "≥1" means logical OR.

[0043] Acquisition of voltage signals from different sources: such as Figure 4 As shown, the logic module (AC quantity) of the above device is equipped with a voltage input signal acquisition channel from the switchgear bus PT and a voltage signal acquisition channel from the switchgear high voltage sensor. The acquisition is used as a criterion for voltage signal measurement and protection logic. It can serve as a dual input information source for overvoltage, undervoltage and other protection logic in the integrated protection of the switchgear, as well as the circuit breaker opening and closing status associated with sequential control action. Different source pressure plate signal acquisition: such as Figure 5 As shown, the logic module (switching quantity) function plug-in of the above device is equipped with a voltage acquisition channel from the pressure plate input and an acquisition channel from the proximity switch above the pressure plate. It serves as a dual input information source for the acquisition and input judgment of the pressure plate signal and for logic such as the control circuit disconnection. Data collected from different source working / experiment locations: such as Figure 6 As shown, the logic module (switching quantity) function plug-in of the above device is equipped with a data acquisition channel from the working / testing auxiliary point of the circuit breaker chassis and a data acquisition channel from two sets of micro switches on the secondary guard plate of the circuit breaker compartment of the switch cabinet. It also serves as the data acquisition and input source of the working and testing position information of the switch cabinet circuit breaker trolley, and as the dual input information source of the five-proof interlock and sequential control action of the switch cabinet. Data collection of circuit breaker locations from different sources: such as Figure 7 As shown, the logic module (switching quantity) of the above-mentioned device has a data acquisition channel from the auxiliary contacts of the circuit breaker in the (switching quantity) function plug-in, and the logic module (mechanical characteristic) of the above-mentioned device has a data acquisition channel from the angular displacement sensor on the main shaft of the circuit breaker in the (mechanical characteristic) function plug-in. At the same time, the switching quantity signal and pulse signal are acquired as the acquisition and input of the circuit breaker opening / closing status, and as the dual input information source for the five-proof interlock and sequential control action of the switch cabinet.

[0044] The integrated online sensing, measurement, control, and protection system adopts a unified trip alarm output and multiplexed input signals to simplify the secondary wiring of the switchgear.

[0045] Combination Figure 8 , Figure 9 The explanation is as follows: The aforementioned holographic sensing intelligent protection and control device and method for the switchgear utilizes a combination of seven sequentially configurable functional modules—power supply 27, AC quantity, switching quantity, mechanical characteristics, partial discharge, online temperature and video measurement, and MCU main control—within an aluminum alloy casing in the logic module, along with a common power conversion board 31. This hardware integration of online sensing, control, and protection functions allows for the reuse of a single set of switching, AC, and sensing quantities. Specifically: The input signals set for the aforementioned AC quantity function plug-in are at least: PT voltage signal; high voltage sensor voltage signal; zero-sequence voltage signal; three-phase CT current signal; zero-sequence CT current signal; used as input signals for device measurement and display, sequential control, protection and live display.

[0046] The aforementioned digital input / output plug-in is equipped with input / output signals, including circuit breaker opening and closing; trolley test and operating position; grounding switch position; spring energy storage position; protection pressure plate; proximity switch; programmable remote signaling; gas / high temperature; interlocking reclosing; remote / local; manual opening; manual closing; backup input signals; and protection closing, remote closing, protection tripping, remote opening, trolley entry / exit, trolley retraction / exit, grounding switch closing / exit, programmable output, alarm, and fault output signals; used as input / output signals for device measurement, display, sequential control, and protection.

[0047] The aforementioned mechanical characteristic function plug-in only has an input signal from an angular displacement sensor; the current acquisition multiplexing switch quantity function plug-in for the tripping and remote tripping circuits is acquired by built-in sensors for the protection tripping and remote tripping circuits and the protection closing and remote closing circuits. The above-mentioned partial discharge function plug-in is equipped with only 3 communication ports, which can be connected to partial discharge sensor signals respectively; The aforementioned online temperature measurement and video function plug-in is equipped with a wireless receiving antenna and a network port, which wirelessly interact with the temperature sensor at the connection point and connect to the network camera to collect temperature signals and signals from the circuit breaker compartment and cable compartment; The aforementioned power function module is equipped with an AC / DC 220V power input; The aforementioned MCU main control function plug-in is equipped with dual-channel RS485 communication terminals and two Ethernet ports.

[0048] The aforementioned common power conversion board 31 is electrically connected to the aforementioned seven functional plug-ins. The common power conversion board is equipped with a unified multi-row pin 30, with a total of 60 pins 29. The pins 29, from top to bottom, are: 24V, 5V, and 3.3V power buses; communication bus; fault output bus; alarm output bus; and voltage, current, input, output, and sensor acquisition signal buses, etc. The signals on the aforementioned signal buses are all low-voltage signals and digital signals, which can ensure the hot-swapping and interchangeability of functional plug-ins.

[0049] The optional equipment can meet the requirements of different switchgear application scenarios through four different combination forms.

[0050] The holographic sensing intelligent protection and control device and control method for the switchgear consists of three modules: Module 1: Display Module; Module 2: Logic Module; Module 3: Master Command Module. Wherein: Module 1: Display Module. This module mainly comprises an aluminum alloy casing, quick-connect interfaces, a 7-inch touchscreen, five LEDs, one speaker, and the aforementioned driver circuit board. The 7-inch touchscreen, five LEDs, and one speaker are embedded in the front of the aluminum alloy casing and electrically connected to the driver circuit board installed inside the casing. The driver circuit board is also electrically connected to one end of the quick-connect interfaces installed on the back and sides of the aluminum alloy casing. The back and bottom of the aluminum alloy casing are provided with guide grooves and locking structures, allowing for quick structural assembly and connection with Modules 2 and 3, respectively.

[0051] Module 2: Logic Module. It mainly consists of an aluminum alloy shell, quick-connect interfaces, and functional plug-ins. The functional plug-ins are embedded in the aluminum alloy shell through guide grooves inside the shell. Multiple functional plug-ins are electrically connected through a common interface conversion board. The back of the aluminum alloy shell is provided with guide grooves and locking structures, and the side is provided with quick-connect interfaces, which can be quickly combined and connected with Module 1 in terms of structure and electricity.

[0052] Module 3: Master Module. It mainly consists of an aluminum alloy housing, quick-connect interface, circuit breaker indicator lights, circuit breaker selector switch, energy storage knob, energy storage indicator light, protection pressure plate, and corresponding proximity switches. The circuit breaker indicator lights, energy storage indicator lights, circuit breaker selector switch, energy storage knob, and protection pressure plate are embedded in the front of the aluminum alloy housing. A proximity switch is also located directly above the protection pressure plate. The back and sides of the aluminum alloy housing are respectively provided with guide grooves, locking structures, and quick-connect interfaces, allowing for quick structural and electrical assembly and connection with Module 1.

[0053] Depending on the application scenario or type of the switchgear, the three modules can be used in any combination. Specific applications and combination forms of the three modules include: The first combination is: Module 1 + Module 2 + Module 3. Module 1 is structurally and electrically connected to Module 3 through its lower guide groove, locking structure, and side quick-connect interface. Module 1 is also structurally and electrically connected to Module 2 through its rear guide groove, locking structure, and side quick-connect interface. This combination method can realize the traditional air-insulated switchgear instrument door layout installation method and is suitable for use in switchgear partial protection and secondary modification of measurement and control applications.

[0054] The second combination is Module 1 + Module 2. This mode uses a split, prefabricated, quick-connect wiring method. Module 1 is installed on the switchgear instrument door, and Module 2 is installed inside the switchgear instrument compartment. Module 1 and Module 2 are connected via prefabricated wiring through their quick-connect interfaces. This combination allows for applications where a master switch is not required, and operation is performed sequentially via a touchscreen. It is suitable for the industrialization of newly developed intelligent switchgear and the comprehensive renovation of older switchgear. The third combination is: Module 1 and Module 3 combined with Module 2. This mode uses a split prefabricated quick-connect wiring method. Module 1 and Module 3 are installed on the instrument door, and Module 2 is installed in the switch cabinet instrument room. It is suitable for switch cabinet application scenarios requiring comprehensive renovation. The fourth combination is Module 3 + Module 2. In this mode, a split prefabricated quick-connect method is used. Module 3 is installed on the instrument door of the switch cabinet, and Module 2 is installed in the instrument room of the switch cabinet. This combination can realize the application scenario of display module and operation through master switch. It is suitable for gas-filled metal-enclosed switchgear and miniaturized ring main unit products on the market.

[0055] The four different combination forms can cover the protection, sensing and measurement and control function requirements of different types and application scenarios, making the application more flexible and the transformation more convenient.

[0056] The device improves operational safety and reliability by incorporating dual information acquisition from different sources into logical judgments.

[0057] The input signals of the switchgear holographic sensing intelligent protection and control device and control method are acquired using dual signals from different sources, specifically including voltage signals, pressure plate signals, trolley position signals, and circuit breaker position signals, wherein: Different source voltage signal acquisition: In the module 2 (AC quantity) function plug-in of the above device, there is a voltage input signal acquisition channel from the switchgear bus PT and a voltage signal acquisition channel from the switchgear high voltage sensor. At the same time, the acquired signals are used as the measurement and protection logic criteria for voltage signals. They can be used as a dual input information source for overvoltage, undervoltage and other protection logic in the integrated protection of the switchgear, as well as the circuit breaker opening and closing status associated with sequential control actions. Different source pressure plate signal acquisition: In the module 2 (switching quantity) function plug-in of the above device, there is a voltage acquisition channel from the pressure plate input and an acquisition channel from the proximity switch above the pressure plate. These channels serve as dual input information sources for pressure plate signal acquisition and input judgment, as well as for logic such as control circuit disconnection. Different source working / test position acquisition: In the module 2 (switching quantity) function plug-in of the above device, there are acquisition channels from the working / test auxiliary points of the circuit breaker chassis and acquisition channels from two sets of micro switches on the secondary guard plate of the switch cabinet circuit breaker compartment. At the same time, it serves as the acquisition and input source of the working and test position information of the switch cabinet circuit breaker trolley, and as the dual input information source of the switch cabinet five-proof interlock and sequential control action; Different source circuit breaker position acquisition: The (switching quantity) function plug-in of the above device is equipped with an acquisition channel from the circuit breaker auxiliary contacts, and the (mechanical characteristic) function plug-in of the above device is equipped with an acquisition channel from the angular displacement sensor on the main shaft of the circuit breaker. At the same time, the switching quantity signal and pulse signal are acquired as the acquisition and input of the circuit breaker opening / closing status, and as the dual input information source for the five-proof interlock and sequential control action of the switch cabinet.

[0058] The integrated online sensing, measurement, control, and protection system adopts a unified trip alarm output and multiplexed input signals to simplify the secondary wiring of the switchgear.

[0059] The aforementioned holographic sensing intelligent protection and control device and method for the switchgear utilizes a combination of seven configurable functional modules—power supply, AC quantity, switching quantity, mechanical characteristics, partial discharge, online temperature and video measurement, and MCU main control—and a common power conversion board housed within the aluminum alloy casing of module 2. This hardware integration of online sensing, control, and protection functions allows for the reuse of a single set of switching, AC, and sensing quantities. Specifically: The input signals set for the aforementioned AC quantity function plug-in are at least: PT voltage signal; high voltage sensor voltage signal; zero-sequence voltage signal; three-CT current signal; zero-sequence CT current signal; used as input signals for device measurement and display, sequential control, protection and live display.

[0060] The aforementioned digital input / output plug-in is equipped with input / output signals, including circuit breaker opening and closing; trolley test and operating position; grounding switch position; spring energy storage position; protection pressure plate; proximity switch; programmable remote signaling; gas / high temperature; interlocking reclosing; remote / local; manual opening; manual closing; backup input signals; and protection closing, remote closing, protection tripping, remote opening, trolley entry / exit, trolley retraction / exit, grounding switch closing / exit, programmable output, alarm, and fault output signals; used as input / output signals for device measurement, display, sequential control, and protection.

[0061] The aforementioned mechanical characteristic function plug-in only has an input signal from an angular displacement sensor; the current acquisition multiplexing switch quantity function plug-in for the tripping and remote tripping circuits is acquired by built-in sensors for the protection tripping and remote tripping circuits and the protection closing and remote closing circuits. The above-mentioned partial discharge function plug-in is equipped with only 3 communication ports, which can be connected to partial discharge sensor signals respectively; The aforementioned online temperature measurement and video function plug-in is equipped with a wireless receiving antenna and a network port, which are respectively connected to the electrical contact temperature sensor and the network camera to collect temperature signals and signals from the circuit breaker compartment and cable compartment; The aforementioned power function module is equipped with an AC / DC 220V power input; The aforementioned MCU main control function plug-in is equipped with dual-channel RS485 communication terminals and two Ethernet ports.

[0062] The aforementioned common power conversion board is electrically connected to the seven functional plug-ins. The common power conversion board is equipped with a uniform double row of pins, with a total of 60 pins. From top to bottom, the pins are: 24V, 5V, and 3.3V power buses; communication bus; fault output bus; alarm output bus; and voltage, current, input, output, and sensor acquisition signal buses. The signals on the above signal buses are all low-voltage and digital signals, which can ensure hot-swapping and interchangeability of functional plug-ins.

[0063] The equipment body adopts a combinable and distributable structural design and electrical quick-connect interface, which can be used in the context of partial renovation, overall renovation and new construction of switch cabinets through plug-and-play and flexible combination. According to the combination form, it can realize three application forms: fully integrated, distributed (measurement and display + main control + data acquisition), and simple integrated (measurement and display + integration). Compared with traditional integrated and split protection devices, this device is more flexible in application, and one device is suitable for more scenario needs, forming a standardized solution.

[0064] The device uses dual information acquisition from different sources, such as power and switch quantity, to participate in logical judgment. Compared with traditional measurement and control protection devices that use a single input signal, the device uses dual signal acquisition from different sources and logical operation, which can improve the safety and reliability of switchgear operation. Each functional plug-in inside the device converts external signals into weak digital signals through its own circuit design. Through modular plug-in circuit design and the combination of power conversion common unit, it realizes the multiplexing of input signals for measurement, display, sequential control and protection and adopts a unified trip alarm output. It also realizes hot plugging and swapping of functional plug-ins. Compared with the traditional separate design of protection and measurement and control devices, it can simplify the secondary wiring of switch cabinet.

[0065] This solution integrates all the functions of switchgear, including measurement, display, sequential control, and protection, into a single device. Compared to the traditional solution that uses multiple terminals to achieve these functions, this solution only requires one wiring design for AC signals, switch signals, and non-electrical signals. It eliminates the need to repeatedly connect to multiple terminals and achieves comprehensive functionality of the switchgear with minimal wiring through the internal circuitry and signal sharing unit.

[0066] This device enables a single hardware unit to meet the needs of various scenarios, including partial renovation (minor rewiring), overall renovation (major rewiring), and new construction (newly manufactured switchgear), through different distributed and integrated combinations. It also meets the requirements of conventional KYN air insulation systems and SF6 (environmentally friendly) gas insulation series high-voltage switchgear cabinets currently on the market.

[0067] It achieves standardized processing and joint participation in logical judgment of electrical and non-electrical signals from different sources and acquisition methods within the device, making the judgment of the position, power, and other status of switching equipment more accurate and reliable.

[0068] It enables the reduction and expansion of hardware device functional units, as well as the flexibility of configurable, replaceable, and hot-swappable functional plug-in positions.

[0069] Those skilled in the art will 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.

[0070] It should be noted that the sequence numbers of the embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0071] The above are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, and any combination of embodiments or solutions, are similarly included within the patent protection scope of the present invention.

Claims

1. A holographic sensing intelligent protection and control device for switchgear, characterized in that, It includes at least a display module and / or a logic module, and also a master module; The display module includes a first aluminum alloy shell, with guide grooves and locking structures respectively provided on the back and bottom of the first aluminum alloy shell, which can be quickly combined and connected with the logic module and the master module respectively; The logic module includes a second aluminum alloy shell, the back of which is provided with a guide groove and a locking structure, which can be quickly combined and connected with the display module. The master module includes a third aluminum alloy shell, with guide grooves, locking structures, and a third quick-connect interface respectively provided on the back and sides of the third aluminum alloy shell, which can be quickly combined and connected with the display module in terms of structure and electrical connection.

2. The switchgear holographic sensing intelligent protection and control device as described in claim 1, characterized in that, The display module also includes two first quick-connect interfaces, a touch screen, light-emitting diodes, a speaker, and a driver circuit board. The touch screen, light-emitting diodes, and speaker are embedded in the front of the first aluminum alloy housing and electrically connected to the driver circuit board installed inside the first aluminum alloy housing. The driver circuit board is also electrically connected to the first quick-connect interfaces installed on the side of the first aluminum alloy housing.

3. The switchgear holographic sensing intelligent protection and control device as described in claim 2, characterized in that, The display module has 5 LEDs, 1 speaker, and 1 seven-inch touchscreen.

4. The switchgear holographic sensing intelligent protection and control device as described in claim 1, characterized in that, The logic module also includes a second quick-connect interface and multiple functional plug-ins. The functional plug-ins are embedded in the second aluminum alloy housing through guide grooves inside the second aluminum alloy housing. The multiple functional plug-ins are electrically connected through a common interface conversion board. The second quick-connect interface is located on the side of the second aluminum alloy housing.

5. The switchgear holographic sensing intelligent protection and control device as described in claim 4, characterized in that, The logic module has seven functional plug-ins.

6. The switchgear holographic sensing intelligent protection and control device as described in claim 1, characterized in that, The master control module also includes a circuit breaker indicator light, a circuit breaker changeover switch, an energy storage knob, an energy storage indicator light, a protection pressure plate, and a proximity switch. The circuit breaker indicator light, the energy storage indicator light, the circuit breaker changeover switch, the energy storage knob, and the protection pressure plate are embedded in the front of the third aluminum alloy housing, and the proximity switch is located above the protection pressure plate.

7. The switchgear holographic sensing intelligent protection and control device as described in any one of claims 1-6, characterized in that, The switchgear holographic perception intelligent protection and control device participates in logical judgment through dual information collection from different sources; The integrated online sensing, measurement, control, and protection system adopts a unified trip alarm output and multiplexed input signals.

8. The switchgear holographic sensing intelligent protection and control device as described in claim 7, characterized in that, Different source voltage signal acquisition: The AC quantity function plug-in of the logic module is equipped with a voltage input signal acquisition channel from the switchgear bus PT and a voltage signal acquisition channel from the switchgear high voltage sensor; the acquired different source voltage signals are logically processed and used as the criterion for voltage signal measurement and protection logic, and can also serve as a dual input information source for overvoltage and undervoltage protection logic in the switchgear integrated protection, as well as the circuit breaker opening and closing status associated with sequential control action; Different source pressure plate signal acquisition: The switch function plug-in of the logic module of the device is equipped with a voltage acquisition channel from the pressure plate input and an acquisition channel from the proximity switch above the pressure plate; the acquired different source pressure plate signals are logically processed and used as the acquisition and input judgment of pressure plate signals, serving as a dual input information source for the control loop disconnection logic.

9. The switchgear holographic sensing intelligent protection and control device as described in claim 7, characterized in that, Different source working / test position acquisition: The switch quantity function plug-in of the logic module of the device is equipped with acquisition channels from the working / test auxiliary points of the circuit breaker chassis and acquisition channels from two sets of micro switches on the secondary guard plate of the circuit breaker compartment of the switchgear; the acquired working / test position signals from different sources are logically processed and used as the acquisition and input source of the working and test position information of the switchgear circuit breaker trolley, and as the dual input information source of the five-proof interlock and sequential control action of the switchgear; Different source circuit breaker position acquisition: The switch quantity function plug-in of the logic module is equipped with an acquisition channel from the auxiliary contacts of the circuit breaker and the mechanical characteristic function plug-in of the logic module is equipped with an acquisition channel from the angular displacement sensor on the main shaft of the circuit breaker; the acquired different source circuit breaker position signals are logically processed and used as the acquisition and input of the circuit breaker opening / closing status, and as a dual input information source for the five-proof interlock and sequential control action of the switch cabinet.

10. The control method of the switchgear holographic sensing intelligent protection and control device as described in any one of claims 1-9, characterized in that, The following steps are included: The display module, logic module, and master module are combined. The display module is structurally and electrically connected to the master module through a guide groove, locking structure, and a first quick-connect interface on the side. The display module is also structurally and electrically connected to the logic module through a guide groove, locking structure, and another quick-connect interface on the side. The display module, logic module, and master module are integrated into one unit. Alternatively, the display module and the logic module are combined, with the display module installed on the instrument door of the switch cabinet and the logic module installed in the instrument room of the switch cabinet. A first quick-connect interface of the display module and a second quick-connect interface of the logic module are connected by a prefabricated wire. Alternatively, the master control module and display module can be combined and then connected to the logic module. The master control module and display module can be installed on the instrument door, with the master control module and display module connected as a single unit. The logic module can be installed in the instrument room of the switchgear. The third quick-connect interface of the master control module and one of the first quick-connect interfaces of the display module are connected by a prefabricated cable. Then, the display module is connected to the second quick-connect interface of the logic module installed inside the switchgear via another first quick-connect interface, also via a prefabricated cable. Alternatively, the master control module and the logic module can be combined. The master control module is installed on the instrument door of the switchgear, and the logic module is installed in the instrument room of the switchgear. The third quick-connect interface of the master control module and the second quick-connect interface of the logic module are connected by prefabricated wires.

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