High-voltage switch synchronous control and acquisition device
By designing a high-voltage switch synchronization control and acquisition device, integrating mechanical characteristic testing and dynamic loop resistance testing, the problems of low test integration and easy sensor damage in the existing technology are solved, and efficient and reliable test results are achieved.
Patent Information
- Application Number
- CN202421812889.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2035-05-23
AI Technical Summary
The mechanical characteristic test and dynamic resistance test of existing high-voltage switching equipment have low integration, and the stroke sensors of the mechanical characteristic monitoring system are complicated to disassemble and easily damaged.
A high-voltage switch synchronization control and acquisition device is designed, including a loop voltage signal processing module, a current source communication module, a voltage source control module, a data acquisition module and a core control module. Through the core control module, control signals are sent to related equipment simultaneously and external data are collected at high speed, realizing the integration of mechanical characteristic testing and dynamic loop resistance testing.
It improves the integration of mechanical characteristic testing and dynamic loop resistance testing, simplifies the device structure, reduces the risk of data inconsistency during the test, improves the reliability of test results, saves the upper computer communication interface, and reduces costs.
Smart Images
Figure CN223022330U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of high - voltage switchgear testing, and particularly relates to a high - voltage switch synchronous control and acquisition device. Background Technique
[0002] High - voltage switchgear is an important protection and control device in the power system, which affects the stable operation of the power system. One of the main reasons for the failure of high - voltage switches is the mechanical failure of the circuit breaker, and the stroke of the contacts of the high - voltage circuit breaker can directly reflect the operating state of the circuit breaker, that is, the mechanical characteristics. At the same time, the ablation condition of the contacts of the high - voltage circuit breaker also affects its electrical life, and the dynamic loop resistance can indirectly reflect the ablation condition of the contacts of the circuit breaker without disassembling the circuit breaker. In the maintenance of high - voltage switchgear, mechanical characteristic testing and dynamic loop resistance testing are important tests for evaluating the state of high - voltage circuit breaker equipment.
[0003] The existing technical solutions generally separate the mechanical characteristic testing and the dynamic resistance testing into two sets of equipment, with a low integration level. At the same time, the existing mechanical characteristic monitoring systems generally use stroke displacement sensors to obtain the stroke of the switch contacts. The disassembly and assembly of the stroke sensors before the test are relatively complex, and they are easily damaged during the test. Summary of the Invention
[0004] The utility model provides a high - voltage switch synchronous control and acquisition device, which solves the technical problem of low integration level between mechanical characteristic testing and dynamic resistance testing.
[0005] To achieve the above - mentioned purpose, a high - voltage switch synchronous control and acquisition device described in the utility model includes a loop voltage signal processing module, a current source communication module, a voltage source control module, a data acquisition module, and a core control module; the output end of the loop voltage signal processing module is connected to the input end of the data acquisition module, and the output end of the data acquisition module is connected to the input end of the core control module; the output end of the core control module is connected to the input end of the current source communication module and the input end of the voltage source control module.
[0006] Further, the loop voltage signal processing module includes an amplifier circuit and a filter circuit which are electrically connected.
[0007] Further, the voltage source control module includes a switching tube Q1 and a switching tube Q2. The two ends of the switching tube Q1 are respectively connected to the positive pole of the closing - opening input connector and the closing output connector, and the two ends of the switching tube Q2 are respectively connected to the negative pole of the closing - opening input connector and the opening output connector.
[0008] Further, the switching tube Q1 and the switching tube Q2 are IGBTs.
[0009] Further, the positive pole of the closing and opening input connector, the negative pole of the closing and opening input connector, the closing output connector, and the opening output connector are all arranged on the outer wall of the high-voltage switch synchronous control and acquisition device.
[0010] Further, three-phase break interfaces, loop voltage signal interfaces, loop current signal interfaces, coil current signal interfaces, DC power communication interfaces, and camera drive interfaces are arranged on the outer wall of the high-voltage switch synchronous control and acquisition device.
[0011] Further, it further includes a host computer communication module, and the host computer communication module is used to realize two-way communication between the core control module and the host computer.
[0012] Further, it further includes an image transmission interface, and the image transmission interface is used to connect the data output end of the high-speed camera and the image acquisition module, and the image acquisition module is connected to the core control module.
[0013] Compared with the prior art, the utility model has at least the following beneficial technical effects:
[0014] The utility model provides a synchronous control and acquisition device, which supports mechanical characteristic testing and dynamic loop resistance testing based on a high-speed camera. The device includes a loop voltage signal processing module, a current source communication module, a voltage source control module, a data acquisition module, and a core control module. In the mechanical characteristic test and the dynamic loop resistance test, the core control module synchronously sends control signals to relevant devices and rapidly acquires external data to realize the two detection processes.
[0015] The synchronous control and acquisition device designed in this solution has a simple structure, a reasonable configuration, and is easy to carry. By controlling the external power supply and relevant sensors through the core control module, the time consistency of the collected data is ensured, and the reliability of the test results is improved. The device has a high integration degree and can support mechanical characteristic testing and dynamic loop resistance testing based on a high-speed camera.
[0016] Further, the synchronous control and acquisition device is provided with a camera drive interface. The core control module drives the high-speed camera to work through the camera drive interface, no longer occupying the interface of the host computer. Compared with the solution of driving the high-speed camera through the host computer, the communication interface of the host computer can be saved, and the cost can be reduced. Description of the Drawings
[0017] Figure 1 Schematic diagram of the synchronous control and acquisition device provided for Embodiment 1;
[0018] Figure 2 Schematic diagram of the ports of the synchronous control and acquisition device provided for Embodiment 1;
[0019] Figure 3 Circuit diagram for dynamic resistance testing
[0020] Figure 4 is the circuit diagram for mechanical characteristic testing;
[0021] Figure 5 is the schematic diagram of the synchronization control and acquisition device provided in Embodiment 2;
[0022] Figure 6 is the schematic diagram of the ports of the synchronization control and acquisition device provided in Embodiment 2.
[0023] In the figure: 1 - DC voltage source; 2 - IGBT Q1; 3 - IGBT Q2; 4 - voltage source control module; 5 - circuit breaker closing coil; 6 - circuit breaker opening coil; 7 - high-voltage circuit breaker; 8 - DC current source; 9 - loop current sensor; 10 - coil current sensor; 11 - high-speed camera. Detailed implementation manners
[0024] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.
[0025] In order to enable those skilled in the art of this technology to better understand the technical solutions in the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the scope of protection of the present utility model.
[0026] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be another intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be another intermediate element at the same time. The orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. used herein is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.
[0028] Related technical explanations
[0029] High-speed camera 11: Compared with an ordinary camera, the high-speed camera 11 can record a dynamic image at a very high frequency.
[0030] Embodiment 1
[0031] Refer to Figure 1 , a high-voltage switch synchronous control and acquisition device, including a loop voltage signal processing module, a current source communication module, a voltage source control module 4, a data acquisition module, a core control module, and a host computer communication module.
[0032] Refer to Figure 2 , on the outer wall of the device, there are installed an A-phase disconnection signal interface P1, a B-phase disconnection signal interface P2, a C-phase disconnection signal interface P3, a loop current signal interface P4, a loop voltage signal interface P5, a coil current signal interface P6, a host computer communication interface P7, a DC power supply communication interface P8, a camera drive interface P9, an image transmission interface 10, a closing and opening input joint positive pole P11, a closing and opening input joint negative pole P12, a closing output joint P13, and an opening output joint P14.
[0033] The voltage source control module 4 includes IGBT Q1 and IGBT Q2. The collector of IGBT Q1 is connected to the closing and opening input joint positive pole P11. The emitter of IGBT Q1 is connected to the closing coil 5 of the circuit breaker through the closing output joint P13. The base of IGBT Q1 is connected to the core control module. The collector of IGBT Q2 is connected to the closing and opening input joint negative pole P12. The emitter of IGBT Q2 is connected to the opening coil 6 of the circuit breaker through the opening output joint P14. The base of IGBT Q2 is connected to the core control module. The closing and opening input joint positive pole, the closing and opening input joint negative pole, the opening output joint, and the closing output joint are used for external connection to control the closing and opening coils of the high-voltage switch, thereby controlling the closing and opening of the high-voltage switch.
[0034] The core control module is connected to the output ends of the data acquisition module, the input end of the current source communication module, the bases of IGBT Q1 and IGBT Q2, the output end of the image acquisition module, and the host computer communication module; the core control module is an FPGA, which simultaneously triggers the high-speed camera 11, the opening and closing actions of the switch, the voltage source control module 1, the DC current source 8 (if necessary), the three-phase disconnector signal acquisition module (if necessary), the loop voltage signal processing module (if necessary), the coil current sensor 10 (if necessary), and the loop current sensor 9 (if necessary) by outputting pulse signals, so that they start working simultaneously to achieve synchronous acquisition of data.
[0035] The host computer communication module is used to realize the two-way communication between the core control module and the host computer.
[0036] The input end of the data acquisition module is connected to the loop current signal interface P4, the coil current signal interface P6, the output end of the loop voltage signal processing module, and the A / B / C phase disconnector signal interface, which is used to receive analog signals, convert the received analog signals into digital signals, and transmit them to the core control module;
[0037] The loop voltage signal processing module is connected to the high-voltage switch under test through the loop voltage signal interface P5, which is used to measure the analog signal of the loop voltage of the high-voltage switch under test, and amplify and filter the analog signal of the loop voltage and then transmit it to the data acquisition module.
[0038] The loop voltage signal processing module includes an amplifier circuit and a filter circuit connected in sequence. The amplifier circuit is connected to the high-voltage switch, and the filter circuit is connected to the data acquisition module.
[0039] During the test, the output end of the current source communication module is connected to the control interface of the DC current source 8 through the DC power supply communication interface P8, and the output end of the voltage source control module 4 is connected to the DC voltage source through the positive pole P11 of the closing and opening input connector. The current source communication module is used to send the control signal of the core control module to the DC current source 8.
[0040] The A / B / C phase disconnector signal interface is connected to the three-phase disconnector signal acquisition module; the loop current signal interface P4 is connected to the loop current sensor 9; the coil current signal interface P6 is connected to the coil current sensor 10; the host computer communication interface P7 is connected to the host computer; the camera drive interface P9 is connected to the high-speed camera, and the image transmission interface P10 connects the output end of the high-speed camera and the input end of the image acquisition module.
[0041] The A / B / C three-phase disconnection signal interface, the loop current signal interface P4, the loop voltage signal interface P5, and the coil current signal interface P6 are six high-speed signal acquisition interfaces, which are connected to external sensors / devices (one-to-one) using aviation plugs, and the acquired voltage signals are connected to an 8-channel 16-bit data acquisition module on the PCB board.
[0042] External device communication interface: The host computer communication interface P7 uses a standard RJ45 interface and is connected to the host computer through a network cable, which is used to receive the configurations issued by the host computer terminal and upload the acquired data; the DC power supply communication interface P8 uses a standard DB9 interface and controls the DC current source 8 through the serial port protocol; the camera drive interface P9 uses a standard BNC interface.
[0043] Embodiment 2
[0044] A high-voltage switch test system includes a high-speed camera 11, a loop current sensor 9, a coil current sensor 10, a three-phase disconnection signal acquisition module, a DC current source 8, a DC voltage source 1, and the high-voltage switch synchronization control and acquisition device described in Embodiment 1.
[0045] Refer to Figure 3 , when performing dynamic loop resistance detection, the core control module turns on the DC current source 8 and the DC voltage source 1, and controls the closing or opening of the IGBT Q1 and IGBT Q2 to control the closing or opening of the switch under test.
[0046] The core control module controls the DC current source 8 in the loop through RS232, obtains the current analog signal in the loop through the loop current sensor 9, and at the same time collects the analog signal of the voltage across the two ends of the loop through the loop voltage signal processing module, and performs amplification and filtering. The amplified and filtered voltage analog signal is transmitted to the data acquisition module and converted into a digital signal by the data acquisition module; by controlling the DC voltage source 1, current-voltage-time data is obtained and uploaded to the host computer through Ethernet. The software in the host computer processes the current-voltage-time data and calculates the dynamic resistance data.
[0047] Since the current of the high-voltage switch under test is one thousand amperes during dynamic resistance testing, but the resistance of the high-voltage switch under test is in the micro-ohm level, the voltage across the high-voltage switch under test is in the millivolt level, so operational amplification and filtering are required.
[0048] Refer to Figure 4, in the mechanical characteristic test, the core control module of the synchronization control acquisition device (hereinafter referred to as the device) can precisely control the external high-speed camera 11, DC voltage source 1, and data acquisition module synchronously in time, enabling them to work simultaneously. The device is connected to the high-speed camera 11 through a BNC cable, and the high-speed camera 11 is triggered to operate by outputting a pulse voltage. The high-speed camera 11 is used to record images related to the dynamic stroke in the switch mechanical characteristics and upload the images to the upper computer through the upper computer communication module. The upper computer obtains the switch contact stroke based on the images at different moments; the device is connected to the upper computer through a network cable and is used to receive the start command and sensing data sent by the synchronization control module; the device is connected to the DC voltage source through a banana plug. By controlling the on / off of the DC voltage source, the DC voltage source acts on the closing and opening coils of the switch to achieve switch closing and opening control. After receiving the start command of the upper computer application program, the device starts the loop voltage signal processing module, loop current sensor 9, coil current sensor 10, and three-phase contact signal acquisition module to collect data. At the same time, a trigger signal is provided through the camera drive interface P9 (BNC interface) connected to the high-speed camera 11 to trigger the synchronous operation of the high-speed camera 11, thereby ensuring the synchronization of the actions of the high-speed camera 11 and the acquisition module.
[0049] As can be seen from the above, this device can be used for dynamic loop resistance detection and mechanical characteristic tests, sharing the voltage source control module 4, opening input positive interface P11, opening input negative interface P12, closing output connector P13, and opening output connector P14, with high integration and convenient operation.
[0050] In this system, the DC current source 8 and DC voltage source 1 are external power supplies and can be replaced according to different test requirements, broadening their scope of use.
[0051] Embodiment 3
[0052] Referring to Figure 5 and Figure 6 , this embodiment provides a high-voltage switch synchronization control and acquisition device. The difference from Embodiment 1 is that in this embodiment, the image acquisition module and image data interface are not included.
[0053] Embodiment 4
[0054] This embodiment provides a high-voltage switch test system. The difference from Embodiment 2 is that in this embodiment, the data output end of the high-speed camera 11 is directly connected to the upper computer.
[0055] The term "consisting of" in describing a combination shall include the recited elements, ingredients, components or steps as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe the combinations of elements, ingredients, components or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components or steps.
[0056] A plurality of elements, ingredients, components or steps can be provided by a single integrated element, ingredient, component or step. Alternatively, a single integrated element, ingredient, component or step may be divided into separate plural elements, ingredients, components or steps. The disclosure of the element, ingredient, component or step as "a" or "an" does not thereby preclude the presence of other elements, ingredients, components or steps.
[0057] It should be understood that the above description is intended for illustration and not for limitation. Many embodiments and many applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the full scope of the foregoing claims and the equivalents thereof. For the sake of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the foregoing claims is not a disclaimer of that subject matter, nor should it be considered that the applicant has not considered that subject matter to be part of the disclosed utility model subject matter.
Claims
1. A high-voltage switch synchronization control and acquisition device, characterized in that, It includes a loop voltage signal processing module, a current source communication module, a voltage source control module, a data acquisition module, and a core control module; The output end of the loop voltage signal processing module is connected to the input end of the data acquisition module, and the output end of the data acquisition module is connected to the input end of the core control module; the output end of the core control module is connected to the input ends of the current source communication module and the voltage source control module.
2. The high-voltage switch synchronous control and acquisition device according to claim 1, characterized in that, The loop voltage signal processing module includes an amplifier circuit and a filter circuit that are electrically connected.
3. A high-voltage switch synchronization control and acquisition device according to claim 1, characterized in that, The voltage source control module includes a switching transistor Q1 and a switching transistor Q2. The two ends of the switching transistor Q1 are respectively connected to the positive pole of the closing and opening input connector and the closing output connector, and the two ends of the switching transistor Q2 are respectively connected to the negative pole of the closing and opening input connector and the opening output connector.
4. A high-voltage switch synchronous control and acquisition device according to claim 3, characterized in that The switching transistor Q1 and the switching transistor Q2 are IGBTs.
5. A high-voltage switch synchronous control and acquisition device according to claim 3, characterized in that The positive pole of the closing and opening input connector, the negative pole of the closing and opening input connector, the closing output connector, and the opening output connector are all arranged on the outer wall of the high-voltage switch synchronous control and acquisition device.
6. The high-voltage switch synchronous control and acquisition device according to claim 1, characterized in that, The outer wall of the high-voltage switch synchronous control and acquisition device is provided with a three-phase break interface, a loop voltage signal interface, a loop current signal interface, a coil current signal interface, a DC power supply communication interface, and a camera drive interface.
7. The high-voltage switch synchronization control and acquisition device according to claim 1, characterized in that It further includes a host computer communication module, and the host computer communication module is used to realize the two-way communication between the core control module and the host computer.
8. A high-voltage switch synchronous control and acquisition device according to claim 1, characterized in that, It further includes an image transmission interface, and the image transmission interface is used to connect the data output end of the high-speed camera and the image acquisition module, and the image acquisition module is connected to the core control module.