Current measuring device for three-phase circuit breaker

Abstract

The embodiment of the invention provides a current measurement device for a three-phase circuit breaker, and the device comprises a control box and a measurement box, and the control box is used for outputting a detection instruction. The measuring box is in communication connection with the control box and receives a detection instruction; wherein the measuring box comprises three current sensors, each current sensor is used for being electrically connected with a corresponding circuit breaker in the three-phase circuit breakers, and the current sensors acquire current data of the circuit breakers in response to a detection instruction. The current measuring device provided by the invention can realize the synchronous measurement of the current of the three-phase opening and closing coil, improves the accuracy of the current measurement of the circuit breaker, simplifies the wiring process by adopting a high-precision sensor and an anti-interference technology and through modular aided design, integrated wireless communication and a compact structure, greatly reduces the risk of manual operation errors, and improves the reliability of the circuit breaker. The method greatly improves the working efficiency, and accords with the high-efficiency trend of high-efficiency operation and maintenance of electric power.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measurement equipment in a substation, and in particular to a current measurement device for a three-phase circuit breaker. BACKGROUND

[0002] In each opening and closing process of the circuit breaker, the coil current in the circuit breaker changes with time, and the change waveform contains the action of the opening and closing link, including the opening and closing coil, the electromagnet itself, the controlled lock, the transmission mechanism and other structures in the operation process. The opening and closing link can be directly judged by the coil current, and the switch defects of the control circuit, the operating mechanism and other parts can be judged.

[0003] At present, the circuit breakers of the substation are mostly electrically linked, and each phase circuit breaker corresponds to an operating mechanism. The distance between the circuit breakers is large, and in the actual circuit breaker opening and closing coil current test, due to the limitation of the current measurement sensor and the test instrument, it is impossible to meet the simultaneous measurement of three phases, and the measurement data accuracy is not high. SUMMARY

[0004] The present application provides a current measurement device for a three-phase circuit breaker, which comprises a control box and a measurement box. The control box is used for outputting a detection instruction. The measurement box is in communication connection with the control box and receives the detection instruction. The measurement box comprises three current sensors. Each current sensor is used for electrical connection with a corresponding phase circuit breaker in the three-phase circuit breaker, and the current sensor collects current data of the circuit breaker in response to the detection instruction.

[0005] In a possible implementation, the control box comprises a control panel, a human-computer interaction module, a pulse module and a first wireless module. The human-computer interaction module is used for obtaining a touch signal and is in electrical connection with the control panel. The pulse module is in electrical connection with the human-computer interaction module and is used for converting the touch signal into a pulse signal. The detection instruction comprises the pulse signal. The first wireless module is in electrical connection with the pulse module, and the first wireless module is used for sending the detection instruction to the measurement box.

[0006] In a possible implementation, the control box comprises a data analysis module, which is used for analyzing the current data to obtain analysis data. The analysis data is used for display on an interface of the human-computer interaction module.

[0007] In a possible implementation, the control box further comprises an opening and closing adjustment module. The opening and closing adjustment module is in electrical connection with the control panel, and the opening and closing adjustment module is used for controlling the opening and closing operation of the high-voltage switch.

[0008] In a possible implementation, the control box further comprises a first box body, a first operation panel, a control power supply and a switch button, the first operation panel being connected with the first box body. The control power supply is installed on the first operation panel and is electrically connected with the control board. The switch button is arranged on the operation panel and is used for controlling power supply or power-off of the control power supply.

[0009] In a possible implementation, the control box further comprises a grounding port, the grounding port being electrically connected with the control board and being used for externally connecting a grounding wire.

[0010] In a possible implementation, the control box further comprises a power supply interface and a power supply module, the power supply interface being electrically connected with the control board and being used for externally connecting a power supply. The power supply module is electrically connected with the power supply interface and the control board respectively and is used for converting alternating current into direct current.

[0011] In a possible implementation, the measurement box comprises a second wireless module and a synchronization module, the second wireless module being used for receiving a detection instruction. The synchronization module is electrically connected with the second wireless module and the three current sensors respectively and is used for receiving the detection instruction and synchronously sending the three current sensors.

[0012] In a possible implementation, the measurement box comprises a data acquisition module and an ARM processing module, the data acquisition module being electrically connected with the three current sensors and being used for performing primary processing on current data to obtain intermediate data. The ARM processing module is electrically connected with the data acquisition module and is used for performing secondary processing on the intermediate data to obtain target data.

[0013] In a possible implementation, the test box comprises a second box body, a second operation panel and a power supply module. The second operation panel is connected with the second box body. The power supply module is arranged in the second box body and is used for supplying power for the second wireless module and the synchronization module.

[0014] Compared with the prior art, the application has the following beneficial effects: The current measurement device disclosed in the application comprises a control box and a measurement box, and the control box and the measurement box are two relatively independent operation boxes. The control box is used for obtaining a detection instruction input by a user and sending the detection instruction to the measurement box. The measurement box has three current sensors, and the three current sensors are respectively used for being electrically connected with respective phase circuit breakers. The measurement box controls the three current sensors to synchronously perform data acquisition on the respective phase circuit breakers according to the received detection instruction, so as to obtain current data of the circuit breakers at present. The three current sensors synchronously perform detection, so that the simultaneous measurement of the current data of the three-phase circuit breaker in the actual circuit breaker opening and closing coil current test can be met, and the problem of low data accuracy caused by separate measurement in the related art can be weakened as much as possible.

[0015] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those having ordinary skill in the art upon examination of the following or can be learned from practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings described in the following embodiments are only some of the embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative labor on the basis of these drawings also belong to the protection scope of the present application.

[0017] Figure 1 A structural schematic diagram of a current measuring device provided by an embodiment of the present application is shown in the figure. Figure 2 A structural schematic diagram of a control box in a current measuring device provided by an embodiment of the present application is shown in the figure. Figure 3 A structural schematic diagram of a control box in a current measuring device provided by an embodiment of the present application is shown in the figure. Figure 4 A structural schematic diagram of a measuring box in a current measuring device provided by an embodiment of the present application is shown in the figure. Figure 5 A structural schematic diagram of a measuring box in a current measuring device provided by an embodiment of the present application is shown in the figure.

[0018] Explanation of reference signs: 1 control box, 11 man-machine interaction module, 12 pulse module, 13 first wireless module, 14 data analysis module, 15 opening and closing adjustment module, 16 first box body, 17 first control panel, 18 control power supply, 19 switch button, 110 grounding port, 111 power supply interface, 112 power supply module, 2 measuring box, 21 current sensor, 22 second wireless module, 23 synchronization module, 24 data acquisition module, 25 ARM processing module, 26 second box body, 27 second control panel, 28 power supply module. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor also belong to the protection scope of the present application.

[0020] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0023] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0024] This application provides a current measuring device for a three-phase circuit breaker, such as... Figure 1 As shown, the system includes a control box 1 and a measuring box 2. The control box 1 is used to output detection commands. The measuring box 2 is communicatively connected to the control box 1 and receives detection commands. The measuring box 2 includes three current sensors 21. Each current sensor 21 is electrically connected to one corresponding phase of the three-phase circuit breaker. In response to the detection command, the current sensor 21 collects the current data of the circuit breaker.

[0025] The current measuring device disclosed in this application includes a control box 1 and a measuring box 2, which are two relatively independent operating boxes. The control box 1 is used to acquire user-input detection commands and send them to the measuring box 2. The measuring box 2 has three current sensors 21, each electrically connected to a different phase circuit breaker. Based on the received detection commands, the measuring box 2 controls the three current sensors 21 to synchronously acquire data from each phase circuit breaker, obtaining the current data of the circuit breaker. The synchronous detection by the three current sensors 21 can meet the requirement of simultaneous measurement of the current data of the three-phase circuit breakers in actual circuit breaker opening and closing coil current tests, thus minimizing the problem of low data accuracy caused by separate measurements in related technologies.

[0026] It should be noted that there can be three measuring boxes 2, and each measuring box 2 is equipped with three current sensors 21 that measure the current of each phase circuit breaker. The current sensor 21 is a signal between the device and the circuit breaker. It is a special sensor used to detect the magnitude of the current in the circuit and convert it into a measurable electrical signal output, so that the device can receive and collect data.

[0027] When the distance between circuit breakers is relatively large, a current sensor 21 in one measuring box 2 can be used for measurement. For example, the circuit breakers include phases A, B, and C. A current sensor 21 in the first measuring box 2 is used to connect to the phase A circuit breaker. A current sensor 21 in the second measuring box 2 is used to connect to the phase B circuit breaker. A current sensor 21 in the third measuring box 2 is used to connect to the phase C circuit breaker. The three measuring boxes 2 are independent structural components, not limited by the installation location or distance of the circuit breakers, and can meet the needs of synchronous testing of actual three-phase circuit breakers. This avoids the data accuracy being affected by excessively long current test leads and data interference, as is common in related technologies.

[0028] This application employs synchronous measurement technology to achieve synchronous measurement of the current of the three-phase opening and closing coils, thereby improving the accuracy of circuit breaker current measurement. At the same time, it adopts high-precision sensors and anti-interference technology, and through modular auxiliary design, integrates wireless communication and compact structure, simplifies the wiring process, significantly reduces the risk of human error, and greatly improves work efficiency, which is in line with the trend of efficient operation and maintenance in the power industry.

[0029] In one possible implementation, such as Figure 2 and Figure 3As shown, the control box 1 includes a control board, a human-machine interface module 11, a pulse module 12, and a first wireless module 13. The human-machine interface module 11 is used to acquire touch signals and is electrically connected to the control board. The pulse module 12 is electrically connected to the human-machine interface module 11 and is used to convert touch signals into pulse signals; the detection command includes the pulse signal. The first wireless module 13 is electrically connected to the pulse module 12 and is used to send the detection command to the measuring box 2.

[0030] The human-machine interface module 11 can adopt a high-definition touch screen and be an all-in-one structure. It is used to display data and the status of each module, and can be operated and set by the staff. For example, it can detect the current signal of the opening and closing coils, perform quantitative analysis of the waveform and comparison with historical data, and realize the rapid diagnosis of faults and defects in the secondary components and mechanical parts related to the action. For example, it can determine the working status of the secondary control circuit, whether the coil is intact, whether there is any jamming in the movement of the iron core, abnormality in the transmission of the mechanism, etc., and can also provide a rough description of the mechanical characteristics of the circuit breaker.

[0031] The pulse module 12 generates electrical pulse signals of a specific frequency and width from the control commands to control the measuring box 2, thereby enabling it to perform its actions.

[0032] In one possible implementation, such as Figure 2 and Figure 3 As shown, the control box 1 includes a data analysis module 14, which analyzes current data to obtain analytical data, which is then displayed on the interface of the human-machine interaction module 11. The data analysis module 14 receives, processes, and analyzes the data collected by the measuring box 2, extracting information from it.

[0033] In one possible implementation, such as Figure 2 and Figure 3 As shown, the control box 1 also includes a circuit breaker adjustment module 15, which is electrically connected to the control board. The circuit breaker adjustment module 15 is used to control the opening and closing operations of the high-voltage switch. The circuit breaker adjustment module 15 includes a closing button, a closing button, a voltage regulating knob, a DC power switch, a digital display screen, and other structures used for operation control.

[0034] In one possible implementation, the control box 1 further includes a first housing 16, a first control panel 17, a control power supply 18, and a switch button 19, with the first control panel 17 connected to the first housing 16. The first housing is made of hard plastic and has a rectangular shell structure, providing physical protection, dust and moisture resistance, and electromagnetic shielding.

[0035] The control power supply 18 is installed on the first control panel 17 and is electrically connected to the control board. The control power supply 18 can provide operating power to the control board, functional components, etc. inside the control box 1.

[0036] The first control panel 17 is made of aluminum alloy and is a rectangular plate. It has a module operation and installation area, including a switch button 19, a socket corresponding to the control power supply 18, a touch screen mounting port, a voltage adjustment knob, a switch port, a power socket, and other mounting ports for installing functional modules.

[0037] like Figure 2 and Figure 3 As shown, the switch button 19 is located on the control panel. The switch button 19 is used to control the power supply or power cut-off of the control power supply 18. The switch button 19 is a rocker switch and is an independent physical button used to turn the overall function of the control box 1 on or off.

[0038] In one possible implementation, the control box 1 further includes a grounding port 110, which is electrically connected to the control board. The grounding port 110 is used to connect an external grounding wire to ensure the safety of the control box 1 and personnel, and to prevent leakage or static electricity.

[0039] In one possible implementation, the control box 1 further includes a power interface 111 and a power module 112. The power interface 111 is electrically connected to the control board and is used to connect an external power source to supply power to the control box 1.

[0040] The power module 112 is electrically connected to the power interface 111 and the control board respectively. The power module 112 is used to convert AC power into DC power for the internal power supply system.

[0041] In one possible implementation, such as Figure 4 and Figure 5 As shown, the measuring box 2 includes a second wireless module 22 and a synchronization module 23. The second wireless module 22 is used to receive detection commands. The synchronization module 23 is electrically connected to the second wireless module 22 and the three current sensors 21, respectively. The synchronization module 23 is used to receive detection commands and synchronously transmit them to the three current sensors 21.

[0042] Among them, the synchronization module 23 is the wireless synchronous opening and closing coil current measurement box 2, which uses GPS second pulse vector signal synchronization technology for synchronous triggering sampling. Synchronous vector acquisition avoids the delay error correction caused by different distances between measurement points in wireless transmission, and also avoids the unstable wireless transmission delay error caused by the dispersion of wireless transmission devices, harsh electromagnetic environment and weather effects, thus improving synchronization accuracy and completely solving the signal synchronization problem.

[0043] Specifically, the second wireless module 22 wirelessly transmits data to the control module via a synchronization pulse signal. Measurement principle: After receiving the test command, the measurement box 2 sends a test signal to the wireless synchronous opening and closing coil current measurement box 2 via radio frequency communication technology. Both enter a waiting test state. When the GPS second pulse vector signal is received, signal sampling is started simultaneously, thereby realizing synchronous triggering sampling of the opening and closing coil current sensor 21 and the time characteristic.

[0044] In one possible implementation, such as Figure 4 and Figure 5 As shown, the measuring box 2 includes a data acquisition module 24 and an ARM processing module 25. The data acquisition module 24 is electrically connected to three current sensors 21. The data acquisition module 24 is used to perform primary processing on the current data to obtain intermediate data. The data acquisition module 24 converts the analog signals output by the current sensors 21 into digital signals, and performs preliminary processing and storage.

[0045] The ARM processing module 25 is electrically connected to the data acquisition module 24. The ARM processing module 25 is used to perform secondary processing on the intermediate data to obtain the target data. The ARM processing module 25 is the core computing unit of the device, running the control program, processing the acquired data, and coordinating the work of various modules.

[0046] In one possible implementation, the test box includes a second housing 26, a second control panel 27, and a power supply module 28. The second control panel 27 is connected to the second housing 26. The second housing 26 is made of rigid plastic and has an overall rectangular structure. It serves as the outer shell of the measuring box 2, housing and protecting various measuring box 2 components, ensuring a stable measurement environment, and providing safety protection. The second control panel 27 is made of aluminum alloy and is an overall rectangular plate with a module operation and installation area on it.

[0047] The power supply module 28 is located inside the second enclosure 26. The power supply module 28 is used to supply power to the second wireless module 22 and the synchronization module 23. The power supply module 28 provides a stable and compliant operating power supply for the entire device or a specific module.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A current measuring device for a three-phase circuit breaker, characterized in that, include: The control box is used to output detection commands; The measuring box is communicatively connected to the control box and receives the detection command; wherein... The measuring box includes three current sensors, each of which is electrically connected to one of the corresponding phases of the three-phase circuit breaker. In response to the detection command, the current sensor collects the current data of the circuit breaker.

2. The current measuring device according to claim 1, characterized in that, The control box includes: Control panel; The human-computer interaction module is used to acquire touch signals and is electrically connected to the control board; A pulse module, electrically connected to the human-computer interaction module, is used to convert the touch signal into the pulse signal, and the detection command includes the pulse signal; A first wireless module is electrically connected to the pulse module, and the first wireless module is used to send the detection command to the measuring box.

3. The current measuring device according to claim 2, characterized in that, The control box includes: The data analysis module is used to analyze the current data to obtain analysis data, which is then displayed on the interface of the human-computer interaction module.

4. The current measuring device according to claim 2, characterized in that, The control box also includes: The circuit breaker adjustment module is electrically connected to the control board and is used to control the opening and closing operations of the high-voltage switch.

5. The current measuring device according to claim 2, characterized in that, The control box also includes: First box; The first control panel is connected to the first housing. A control power supply is installed on the first control panel, and the control power supply is electrically connected to the control board. A switch button is located on the control panel and is used to control the power supply to or from the control power source.

6. The current measuring device according to claim 2, characterized in that, The grounding port is electrically connected to the control board and is used to connect an external grounding wire.

7. The current measuring device according to claim 2, characterized in that, A power interface is electrically connected to the control board, and the power interface is used to connect an external power source. The power module is electrically connected to both the power interface and the control board, and is used to convert AC power into DC power.

8. The current measuring device according to any one of claims 1 to 7, characterized in that, The measuring box includes: The second wireless module is used to receive the detection command; The synchronization module is electrically connected to the second wireless module and the three current sensors respectively. The synchronization module is used to receive the detection command and synchronously send it to the three current sensors.

9. The current measuring device according to claim 8, characterized in that, The measuring box includes: A data acquisition module is electrically connected to the three current sensors. The data acquisition module is used to perform primary processing on the current data to obtain intermediate data. An ARM processing module is electrically connected to the data acquisition module. The ARM processing module is used to perform secondary processing on the intermediate data to obtain the target data.

10. The current measuring device according to claim 8, characterized in that, The test chamber includes: Second box; The second control panel is connected to the second housing. A power supply module is installed inside the second enclosure, and the power supply module is used to supply power to the second wireless module and the synchronization module.

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