Intelligent vacuum circuit breaker

Abstract

The utility model discloses an intelligent vacuum circuit breaker, which comprises an operating main shaft, an isolating switch shaft, a solid-sealed polar pole and a grounding switch, the operating main shaft and the isolating switch shaft are respectively driven to rotate by a circuit breaker electric operating mechanism and an isolating switch electric operating mechanism, and an insulating shell of the solid-sealed polar pole is provided with a current sensor and a voltage sensor. The operating main shaft drives a breaker moving contact and a breaker static contact to be in contact or separated through an insulating pull rod, the insulating pull rod is provided with a pressure sensor, the breaker static contact is connected with one end of an isolation switch disconnecting link, and an isolation switch shaft drives the other end of the isolation switch disconnecting link to be in contact or separated from an isolation static contact. The circuit breaker electric operating mechanism is provided with a remote communication antenna and a control module. The purpose of the utility model is to provide an intelligent vacuum circuit breaker, which enables a 35kV prefabricated substation to completely realize remote control, state measurement and health monitoring, improves the operation efficiency, and realizes remote control of the health state of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an intelligent vacuum circuit breaker. Background Art

[0002] Large-scale wind farms and centralized photovoltaic power stations generally occupy a large area, and the power generation equipment is far away from the control room. Operation, maintenance and inspection require long-distance travel, which is time-consuming and labor-intensive, and inefficient. Among them, the 35kV prefabricated substation is an important electrical equipment in the system, which requires a high frequency of maintenance and operation. The problem of low system maintenance and operation efficiency is particularly prominent. The operation of the prefabricated substation is mainly for the closing and opening operation and status detection of the 35kV switch on the high-voltage side. Therefore, for the switches on the 35kV high-voltage side of the prefabricated substation, the market urgently needs a product that can realize remote control, status measurement and switch health monitoring without going to the equipment site. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an intelligent vacuum circuit breaker, which enables the 35kV prefabricated substation to fully realize remote control, status measurement and health monitoring, improves operation efficiency, and realizes remote control of the health status of the equipment.

[0004] The utility model intelligent vacuum circuit breaker comprises a frame, the frame is plate-shaped, an operating spindle and an isolating switch shaft are rotatably mounted on the frame through bearings, the operating spindle is driven to rotate by the circuit breaker electric operating mechanism, the isolating switch shaft is driven to rotate by the isolating switch electric operating mechanism, a sealed pole is arranged on the frame, the sealed pole comprises an insulating shell, a vacuum arc extinguishing chamber is arranged in the insulating shell, a circuit breaker moving contact and a circuit breaker static contact are arranged at two ends of the vacuum arc extinguishing chamber, a current sensor and a voltage sensor are arranged on the insulating shell, the operating spindle drives the circuit breaker moving contact through an insulating pull rod The contact contacts or separates with the static contact of the circuit breaker, a pressure sensor is provided on the insulating pull rod, the static contact of the circuit breaker is connected with one end of the isolating switch knife switch, the isolating switch shaft drives the other end of the isolating switch knife switch to contact or separate with the isolating static contact arranged on the frame, and the frame is also provided with a grounding switch. The circuit breaker electric operating mechanism is provided with a remote communication antenna and a control module, the remote communication antenna is used to establish a wireless transmission channel between the control module and the control room, and the control module is electrically connected with the circuit breaker electric operating mechanism, the isolating switch electric operating mechanism, the current sensor, the voltage sensor and the pressure sensor respectively.

[0005] The utility model provides an intelligent vacuum circuit breaker, wherein the isolating switch electric operating mechanism comprises a first motor, the first motor drives the isolating switch shaft to rotate through a first gear transmission mechanism or a first chain transmission mechanism, and the first motor is electrically connected to a control module.

[0006] The utility model discloses an intelligent vacuum circuit breaker, wherein the grounding switch comprises a grounding switch shaft, a grounding switch knife and a grounding static contact, the grounding switch shaft is rotatably mounted on a frame, one end of the grounding switch knife is connected to the grounding switch shaft, the frame is also provided with a grounding switch electric operating mechanism, the grounding switch electric operating mechanism comprises a second motor, the second motor drives the grounding switch shaft to rotate through a second gear transmission mechanism or a second chain transmission mechanism and makes the other end of the grounding switch knife contact or separate with the grounding static contact, and the second motor is electrically connected to a control module.

[0007] The utility model discloses an intelligent vacuum circuit breaker, wherein the sealed pole is arranged on a frame in a horizontal direction, the two ends of the sealed pole are respectively a first end and a second end, the first end and the second end are respectively located on opposite sides of the frame, one end of the circuit breaker moving contact is located in the vacuum arc extinguishing chamber, the other end of the circuit breaker moving contact passes through one end of the vacuum arc extinguishing chamber and extends to the outside of the first end of the sealed pole, the circuit breaker static contact is installed inside the other end of the vacuum arc extinguishing chamber, the circuit breaker static contact is connected to one end of the first lead, the other end of the first lead passes through the second end of the sealed pole, the first lead is wrapped in the insulating shell of the sealed pole, and the other end of the first lead is hinged to one end of the disconnector knife switch.

[0008] The utility model discloses an intelligent vacuum circuit breaker, wherein the operating spindle is located on one side of the first end of the frame close to the sealed pole, the operating spindle is fixedly connected to one end of the first crank arm, the other end of the first crank arm is hinged to one end of the insulating pull rod, the other end of the insulating pull rod is hinged to one end of the second crank arm, the middle part of the second crank arm is hinged to a bracket, the bracket is fixedly arranged on the first end of the sealed pole, the other end of the second crank arm is hinged to the other end of the moving contact of the circuit breaker, and the operating spindle drives the moving contact of the circuit breaker to contact or separate with the static contact of the circuit breaker through the first crank arm, the insulating pull rod and the second crank arm.

[0009] The utility model provides an intelligent vacuum circuit breaker, wherein one end of the insulating pull rod is fixedly provided with a pressure sensor, and the pressure sensor is hinged to the other end of the first crank arm.

[0010] The utility model discloses an intelligent vacuum circuit breaker, wherein the isolating switch shaft is located on the second end side of the frame close to the sealed pole, the isolating switch shaft is fixedly connected to one end of the third crank arm, the other end of the third crank arm is hinged to one end of the insulating push rod, the other end of the insulating push rod is hinged to the isolating switch knife switch, and the isolating switch shaft drives the other end of the isolating switch knife switch to contact or separate with the isolating static contact through the third crank arm and the insulating push rod.

[0011] In the utility model intelligent vacuum circuit breaker, the isolating static contact is fixedly arranged on a first insulating support column, and the first insulating support column is fixedly arranged on one side of the second end of the frame close to the sealed pole.

[0012] The utility model provides an intelligent vacuum circuit breaker, wherein the other end of the circuit breaker moving contact is fixedly connected with a second lead wire, the second lead wire is supported on a second insulating support, and the second insulating support is fixedly arranged on one side of the first end of the frame close to the sealed pole.

[0013] The difference between the intelligent vacuum circuit breaker of the present invention and the prior art lies in that when the intelligent vacuum circuit breaker of the present invention is working, the remote communication antenna can establish a wireless transmission channel between the control module and the remote control room, and the control module receives the closing and opening control signals of the control room through the wireless transmission channel, and realizes the closing and opening operations of the sealed pole and the isolating switch by controlling the actions of the circuit breaker electric operating mechanism and the isolating switch electric operating mechanism. Specifically: when closing, the grounding switch is not grounded, the control module controls the action of the circuit breaker electric operating mechanism to close the sealed pole, and the control module controls the action of the isolating switch electric operating mechanism to close the isolating switch; when opening, the grounding switch is grounded, the control module controls the action of the circuit breaker electric operating mechanism to open the sealed pole, and the control module controls the action of the isolating switch electric operating mechanism to open the isolating switch. At the same time, the current sensor and voltage sensor in the utility model transmit the monitored current signal and voltage signal of the system to the control module, and the control module then transmits the current signal and voltage signal to the control room in real time through the wireless transmission channel for the reference of the on-duty personnel. When a short circuit occurs in the system, the control module directly determines and disconnects the sealed pole, and uploads the result of the protection action to the control room, notifying the on-duty personnel to conduct scheduling and safety patrols. In addition, the pressure sensor can monitor the contact pressure of the vacuum circuit breaker in real time, and transmit the pressure signal to the control module, which then transmits the pressure signal to the control room. When the pressure is abnormal, the abnormal pressure signal is transmitted to the control module, and the control module then transmits the abnormal pressure signal to the control room to alarm, and monitors the safety and health status of the circuit breaker itself at all times. It can be seen that the utility model enables the 35kV prefabricated substation to fully realize remote control, status measurement and health monitoring, improves the operation efficiency, and realizes remote control of the health status of the equipment.

[0014] The utility model will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure diagram of the intelligent vacuum circuit breaker of the utility model is shown in FIG. Figure 1 ;

[0016] Figure 2 The structure diagram of the intelligent vacuum circuit breaker of the utility model is shown in FIG. Figure 2 ;

[0017] Figure 3 The structure diagram of the intelligent vacuum circuit breaker of the utility model is shown in FIG. Figure 3 ;

[0018] Figure 4 It is a schematic diagram of the structure of the solid-sealed pole in the utility model;

[0019] Figure 5 For along Figure 4 Section view along line AA. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, combined with Figure 2-5 As shown, the intelligent vacuum circuit breaker of the utility model comprises a frame 4, which is in the shape of a plate, and an operating spindle 5 and a disconnector shaft 20 are rotatably mounted on the frame 4 through bearings, respectively. The operating spindle 5 is located at the upper part of the frame 4, and the disconnector shaft 20 is located at the middle part of the frame 4. The operating spindle 5 is driven to rotate by the circuit breaker electric operating mechanism 1, and the disconnector shaft 20 is driven to rotate by the disconnector electric operating mechanism. The frame 4 is provided with a sealed pole 10, and the sealed pole 10 includes an insulating shell, and a vacuum arc chamber 35 is provided in the insulating shell. The two ends of the vacuum arc chamber 35 are respectively provided with a circuit breaker moving contact 33 and a circuit breaker static contact 34, and the insulating shell is provided with a current sensor 6 and a voltage sensor 7. The operating spindle 5 drives the circuit breaker moving contact 33 to contact or separate with the circuit breaker static contact 34 through an insulating pull rod 9, and a pressure sensor 36 is provided on the insulating pull rod 9. The circuit breaker static contact 34 is connected to one end (upper end) of the isolating switch blade 25, and the isolating switch shaft 20 drives the other end (lower end) of the isolating switch blade 25 to contact or separate with the isolating static contact 24 provided on the frame 4. The frame 4 is also provided with a grounding switch, which is located at the bottom of the frame 4. The circuit breaker electric operating mechanism 1 is provided with a remote communication antenna 3 and a control module 2, and the remote communication antenna 3 is used to establish a wireless transmission channel between the control module 2 and the control room, and the control module 2 is electrically connected to the circuit breaker electric operating mechanism 1, the isolating switch electric operating mechanism, the current sensor 6, the voltage sensor 7 and the pressure sensor 36 respectively.

[0021] The circuit breaker electric operating mechanism 1 is a prior art, which includes a motor, which drives the operating main shaft 5 to rotate through a transmission mechanism. After the control module 2 receives the closing and opening signals from the control room, the control module 2 controls the motor to rotate forward and reverse (the control module 2 is electrically connected to the motor), and the motor drives the operating main shaft 5 forward and reverse through the transmission mechanism to achieve the contact and separation of the circuit breaker moving contact 33 and the circuit breaker static contact 34. When the circuit breaker moving contact 33 and the circuit breaker static contact 34 are in contact, the sealed pole 10 is closed, and vice versa, when the circuit breaker moving contact 33 and the circuit breaker static contact 34 are separated, the sealed pole 10 is opened.

[0022] In this embodiment, the current sensor 6, the voltage sensor 7 and the pressure sensor 36 are all electrically connected to the control module 2 through the sensor wire 21. The current sensor 6 and the voltage sensor 7 are configured as an integrated structure with the sealed pole 10 (specifically, the insulating shell of the sealed pole 10), that is, the three are a whole.

[0023] like Figure 2 As shown, the isolating switch electric operating mechanism includes a first motor 22, which is fixed on the frame 4. The first motor 22 drives the isolating switch shaft 20 to rotate through a first gear transmission mechanism or a first chain transmission mechanism. The first motor 22 is electrically connected to the control module 2.

[0024] When the first motor 22 drives the isolating switch shaft 20 to rotate through the first gear transmission mechanism, the first gear 29 is fixedly arranged on the output shaft of the first motor 22, and the second gear 31 is fixedly arranged on the isolating switch shaft 20, so that the first gear 29 and the second gear 31 are meshed with each other, so that the first motor 22 can drive the isolating switch shaft 20 to rotate through the first gear 29 and the second gear 31. Of course, a transition gear 30 can also be added between the first gear 29 and the second gear 31, so that the first gear 29 is first meshed with the transition gear 30, and then the transition gear 30 is meshed with the second gear 31, so that the first motor 22 can drive the isolating switch shaft 20 to rotate through the first gear 29, the transition gear 30 and the second gear 31. The first gear 29 and the second gear 31, or the first gear 29, the transition gear 30 and the second gear 31 described above constitute the first gear transmission mechanism.

[0025] like Figure 2As shown, when the first gear 29, the transition gear 30 and the second gear 31 constitute the first gear transmission mechanism, the transition gear 30 is rotatably installed in the gear frame 32, one end of the gear frame 32 is fixed on the first motor 22, and the output shaft of the first motor 22 extends into the gear frame 32. The first gear 29 is located in the gear frame 32, and the other end of the gear frame 32 is rotatably mounted on the isolating switch shaft 20. The second gear 31 is also located in the gear frame 32. In this way, the first motor 22 can drive the first gear 29 to rotate, and the first gear 29 can drive the transition gear 30 to rotate, and the transition gear 30 can drive the second gear 31 to rotate, so that the isolating switch shaft 20 rotates.

[0026] When the first motor 22 drives the isolating switch shaft 20 to rotate through the first chain transmission mechanism, a first sprocket is fixedly arranged on the output shaft of the first motor 22, a second sprocket is fixedly arranged on the isolating switch shaft 20, and a chain is connected between the first sprocket and the second sprocket, so that the first motor 22 can drive the first sprocket to rotate, and the first sprocket drives the second sprocket to rotate through the chain, so that the isolating switch shaft 20 rotates. The above-mentioned first sprocket, second sprocket and chain constitute the first chain transmission mechanism.

[0027] When the control module 2 receives the closing and opening signals from the control room, the control module 2 controls the first motor 22 to rotate forward and reverse, and the first motor 22 drives the isolating switch shaft 20 forward and reverse through the first gear transmission mechanism or the first chain transmission mechanism, and the isolating switch shaft 20 drives the other end of the isolating switch knife 25 to contact and separate from the isolating static contact 24. When the other end of the isolating switch knife 25 contacts the isolating static contact 24, the isolating switch is closed, and vice versa, when the other end of the isolating switch knife 25 separates from the isolating static contact 24, the isolating switch is opened. The isolating switch includes the above-mentioned isolating switch shaft 20, the isolating switch knife 25 and the isolating static contact 24.

[0028] like Figure 1 , 2 As shown, the utility model intelligent vacuum circuit breaker, wherein the grounding switch includes a grounding switch shaft 18, a grounding switch knife 17 and a grounding static contact 16, the grounding switch shaft 18 is rotatably mounted on the frame 4 through a bearing, the grounding switch shaft 18 is located at the bottom of the frame 4, one end (upper end) of the grounding switch knife 17 is fixedly connected to the grounding switch shaft 18, and the frame 4 is also provided with a grounding switch electric operating mechanism (not shown in the figure), the grounding switch electric operating mechanism includes a second motor, the second motor drives the grounding switch shaft 18 to rotate through a second gear transmission mechanism or a second chain transmission mechanism and makes the other end (lower end) of the grounding switch knife 17 contact or separate with the grounding static contact 16, and the second motor is electrically connected to the control module 2.

[0029] The second gear transmission mechanism has the same structure as the first gear transmission mechanism, and the second chain transmission mechanism has the same structure as the first chain transmission mechanism. After receiving the closing and opening signals from the control room, the control module 2 controls the second motor to rotate forward and reverse, and the second motor drives the grounding switch shaft 18 forward and reverse through the second gear transmission mechanism or the second chain transmission mechanism, so that the lower end of the grounding switch knife 17 can contact and separate from the grounding static contact 16. When the lower end of the grounding switch knife 17 contacts the grounding static contact 16, the grounding switch is grounded. Conversely, when the lower end of the grounding switch knife 17 separates from the grounding static contact 16, the grounding switch is not grounded.

[0030] like Figure 1 , 2 As shown in Figure 3, the utility model is an intelligent vacuum circuit breaker, wherein the sealed pole 10 is arranged on the frame 4 in the horizontal direction, and the sealed pole 10 is located in the middle position of the operating main shaft 5 and the disconnector shaft 20. The two ends of the sealed pole 10 are respectively a first end and a second end, and the first end and the second end are respectively located on opposite sides of the frame 4. One end of the circuit breaker moving contact 33 is located in the vacuum arc chamber 35, and the other end of the circuit breaker moving contact 33 passes through one end of the vacuum arc chamber 35 and extends to the outside of the first end of the sealed pole 10. The circuit breaker static contact 34 is installed inside the other end of the vacuum arc chamber 35, and the circuit breaker static contact 34 is connected to one end of the first lead 27, and the other end of the first lead 27 passes through the second end of the sealed pole 10, and the first lead 27 is wrapped in the insulating shell of the sealed pole 10, and the other end of the first lead 27 is hinged to one end (upper end) of the disconnector knife 25.

[0031] The utility model provides an intelligent vacuum circuit breaker, wherein the operating spindle 5 is located on a side of the first end of the frame 4 close to the sealed pole 10, the operating spindle 5 is fixedly connected to one end of the first crank arm 8, the other end of the first crank arm 8 is hinged to one end of the insulating pull rod 9 (close to the end of the frame 4), the other end of the insulating pull rod 9 (far away from the end of the frame 4) is hinged to one end (upper end) of the second crank arm 11, the middle part of the second crank arm 11 is hinged to a bracket 13, the bracket 13 is fixedly arranged on the first end of the sealed pole 10, the other end (lower end) of the second crank arm 11 is hinged to the other end of the circuit breaker moving contact 33, and the operating spindle 5 drives the circuit breaker moving contact 33 to contact or separate with the circuit breaker static contact 34 through the first crank arm 8, the insulating pull rod 9 and the second crank arm 11.

[0032] like Figure 1 As shown, the second crank arm 11 is hinged to the bracket 13 through the first pin 12, and the first crank arm 8, the insulating pull rod 9, the second crank arm 11 and the connection line between the first pin 12 and the operating main shaft 5 together form a four-bar linkage. Figure 1 When the first crank arm 8 swings away from the frame 4, the insulating pull rod 9 also moves away from the frame 4, the upper end of the second crank arm 11 swings away from the frame 4, and the lower end of the second crank arm 11 swings toward the frame 4, so that the circuit breaker moving contact 33 moves into the vacuum interrupter 35 until the circuit breaker moving contact 33 contacts the circuit breaker static contact 34 in the vacuum interrupter 35, thereby closing the sealed pole 10. On the contrary, when the operating spindle 5 is reversed (i.e. Figure 1 The first crank arm 8 swings toward the frame 4, the insulating pull rod 9 also moves toward the frame 4, the upper end of the second crank arm 11 swings toward the frame 4, and the lower end of the second crank arm 11 swings away from the frame 4, so that the moving contact 33 of the circuit breaker moves toward the outside of the vacuum interrupter 35, causing the moving contact 33 of the circuit breaker to separate from the static contact 34 of the circuit breaker in the vacuum interrupter 35, thereby realizing the opening of the sealed pole 10.

[0033] like Figure 3 As shown, in the intelligent vacuum circuit breaker of the utility model, a pressure sensor 36 is fixedly provided at one end of the insulating pull rod 9 (the end close to the frame 4 ), and the pressure sensor 36 is hinged to the other end of the first crank arm 8 .

[0034] like Figure 2 , 3 As shown, the utility model intelligent vacuum circuit breaker, wherein the isolating switch shaft 20 is located on the second end side of the frame 4 close to the sealed pole 10, the isolating switch shaft 20 and the operating spindle 5 are respectively located on the opposite sides of the frame 4, the isolating switch shaft 20 is fixedly connected to one end of the third crank arm 19, the other end of the third crank arm 19 is hinged to one end of the insulating push rod 26 (close to the end of the frame 4), the other end of the insulating push rod 26 (away from the end of the frame 4) is hinged to the isolating switch knife 25, the other end of the insulating push rod 26 is hinged between the two ends of the isolating switch knife 25, and the isolating switch shaft 20 drives the other end (lower end) of the isolating switch knife 25 to contact or separate with the isolating static contact 24 through the third crank arm 19 and the insulating push rod 26.

[0035] In the intelligent vacuum circuit breaker of the utility model, the isolating static contact 24 is fixed on the first insulating support 23, and the first insulating support 23 is fixed on the second end side of the frame 4 close to the sealed pole 10. The first insulating support 23 and the isolating switch shaft 20 are located on the same side of the frame 4.

[0036] The first insulating support 23 is located below the second end of the sealed pole 10 , and the disconnector shaft 20 , the third crank arm 19 and the insulating push rod 26 are all located between the second end of the sealed pole 10 and the first insulating support 23 .

[0037] The upper end of the isolating switch blade 25 is hinged to the other end of the first lead 27 through the second pin 28, and the third crank arm 19, the insulating push rod 26, the isolating switch blade 25, and the connection line between the second pin 28 and the isolating switch shaft 20 together form a four-bar linkage. Therefore, when the isolating switch shaft 20 rotates forward, the third crank arm 19 swings toward the direction close to the frame 4, the insulating push rod 26 also moves toward the direction close to the frame 4, and the lower end of the isolating switch blade 25 also swings toward the direction close to the frame 4, until the lower end of the isolating switch blade 25 contacts the isolating static contact 24, so that the isolating switch is closed. On the contrary, when the isolating switch shaft 20 rotates reversely, the third crank arm 19 swings toward the direction away from the frame 4, the insulating push rod 26 also moves toward the direction away from the frame 4, and the lower end of the isolating switch blade 25 also swings toward the direction away from the frame 4, so that the lower end of the isolating switch blade 25 is separated from the isolating static contact 24, so that the isolating switch is opened.

[0038] like Figure 1 As shown, the intelligent vacuum circuit breaker of the utility model, wherein the other end of the circuit breaker moving contact 33 is fixedly connected to the second lead 14, the second lead 14 is supported on the second insulating support 15, and the second insulating support 15 is fixedly arranged on the side of the frame 4 close to the first end of the sealed pole 10. The second insulating support 15 and the first end of the sealed pole 10 are located on the same side of the frame 4.

[0039] There are three sealed poles 10 in the utility model, and the three-phase sealed poles 10 are arranged horizontally and fixed above the frame 4. Correspondingly, there are three first crank arm 8, insulating pull rod 9, second crank arm 11, bracket 13, third crank arm 19, insulating push rod 26, isolating switch knife 25, isolating static contact 24, first insulating support 23, second lead 14, second insulating support 15, grounding switch knife 17 and grounding static contact 16.

[0040] When the intelligent vacuum circuit breaker of the utility model is working, the remote communication antenna 3 can establish a wireless transmission channel between the control module 2 and the remote control room. The control module 2 receives the closing and opening control signals of the control room through the wireless transmission channel, and realizes the closing and opening operations of the vacuum circuit breaker by controlling the actions of the circuit breaker electric operating mechanism 1, the isolating switch electric operating mechanism and the grounding switch electric operating mechanism. Specifically, when closing the circuit, the control module 2 controls the action of the grounding switch electric operating mechanism to realize that the grounding switch is not grounded, the control module 2 controls the action of the circuit breaker electric operating mechanism 1 to realize the closing of the sealed pole 10, and the control module 2 controls the action of the isolating switch electric operating mechanism to realize the closing of the isolating switch; when opening the circuit, the control module 2 controls the action of the grounding switch electric operating mechanism to realize the grounding of the grounding switch, the control module 2 controls the action of the circuit breaker electric operating mechanism 1 to realize the opening of the sealed pole 10, and the control module 2 controls the action of the isolating switch electric operating mechanism to realize the opening of the isolating switch. At the same time, the current sensor 6 and the voltage sensor 7 in the utility model transmit the monitored current signal and voltage signal of the system to the control module 2, and the control module 2 transmits the current signal and voltage signal to the control room in real time through the wireless transmission channel for the reference of the on-duty personnel. When a short circuit fault occurs in the system, the control module 2 directly judges and disconnects the sealed pole 10, and uploads the result of the protection action to the control room, notifying the on-duty personnel to carry out scheduling and safety patrol. In addition, the pressure sensor 36 can monitor the contact pressure of the vacuum circuit breaker in real time, and transmit the pressure signal to the control module 2, and the control module 2 transmits the pressure signal to the control room. When the pressure is abnormal, the abnormal pressure signal is transmitted to the control module 2, and the control module 2 transmits the abnormal pressure signal to the control room to alarm, and monitors the safety and health status of the circuit breaker itself at all times. It can be seen that the utility model enables the 35kV prefabricated substation to fully realize remote control, state measurement and health monitoring, improves the operation efficiency, and realizes remote control of the health status of the equipment.

[0041] The utility model can realize the electric operation and remote control of the vacuum circuit breaker, the online monitoring of the contact pressure of the vacuum interrupter 35, the electric operation and remote control of the disconnector, realize the uploading of the system current and voltage digital signals, and has the communication function with the station control layer, so that the 35kV prefabricated substation can fully realize remote control, status measurement and health monitoring, improve the operation efficiency, and realize the remote control of the health status of the equipment.

[0042] The advantages of the utility model are as follows:

[0043] (1) A control module 2 is provided on the panel of the circuit breaker electric operating mechanism 1 , and a remote communication antenna 3 is provided on the upper surface of the circuit breaker electric operating mechanism 1 .

[0044] The control module 2 realizes intelligent control and status monitoring of the circuit breaker, and uploads the monitored status of the circuit breaker and the power system through the remote communication antenna 3. The control module 2 can also receive control signals from the remote control room to realize manual operation of the circuit breaker.

[0045] (2) The isolating switch shaft 20 is driven by the isolating switch electric operating mechanism 10, and the closing and opening operations of the isolating switch 9 can be controlled by remote instructions, so that the main circuit of the system produces a safe and clearly visible break.

[0046] (3) The voltage sensor 7, the current sensor 6 and the sealed pole 10 are integrated into one, and the three are seamlessly integrated and compact.

[0047] (4) A pressure sensor 36 is provided at one end of the insulating pull rod 9, which can realize real-time monitoring of the contact pressure, a key parameter during the operation of the circuit breaker. When the contact pressure is abnormal, an alarm is sounded to remind the operation and maintenance personnel to handle the fault.

[0048] The utility model can realize the remote electric closing and opening operation of the vacuum circuit breaker, and there is no need to operate on the switch equipment site, which greatly improves the efficiency of the operation; the voltage sensor 7 and the current sensor 6 are set as an integrated structure with the sealed pole 10, and the degree of integration is high. The voltage sensor 7 and the current sensor 6 can be used to monitor and protect the operation of the power system; all the above information can be uploaded to the control room of the substation through the control module 2, so that the on-duty personnel can monitor and query the operation data of the equipment and system in real time.

[0049] In the present invention, the control module 2 can adopt a DSP (Digital Signal Processor) digital signal processor, an FPGA (Field-Programmable Gate Array) field programmable gate array, an MCU (Microcontroller Unit) system board, a SoC (system on a chip) system board or a PLC (Programmable Logic Controller) minimum system including I / O.

[0050] It should be noted that the directions or positional relationships indicated by terms such as "center", "up", "down", "front", "back", "left", "right", and "middle" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An intelligent vacuum circuit breaker, characterized in that: The invention comprises a frame, which is in a plate shape, and an operating spindle and an isolating switch shaft are rotatably mounted on the frame through bearings, respectively. The operating spindle is driven to rotate by the electric operating mechanism of the circuit breaker, and the isolating switch shaft is driven to rotate by the electric operating mechanism of the isolating switch. A sealed pole is arranged on the frame, and the sealed pole comprises an insulating shell, and a vacuum arc extinguishing chamber is arranged in the insulating shell. A circuit breaker moving contact and a circuit breaker static contact are arranged at two ends of the vacuum arc extinguishing chamber, respectively. A current sensor and a voltage sensor are arranged on the insulating shell, and the operating spindle drives the circuit breaker moving contact and the circuit breaker static contact through an insulating pull rod. The contacts are in contact or separated, a pressure sensor is provided on the insulating pull rod, the circuit breaker static contact is connected to one end of the isolating switch knife switch, the isolating switch shaft drives the other end of the isolating switch knife switch to contact or separate with the isolating static contact arranged on the frame, and the frame is also provided with a grounding switch. The circuit breaker electric operating mechanism is provided with a remote communication antenna and a control module, the remote communication antenna is used to establish a wireless transmission channel between the control module and the control room, and the control module is electrically connected to the circuit breaker electric operating mechanism, the isolating switch electric operating mechanism, the current sensor, the voltage sensor and the pressure sensor respectively.

2. The intelligent vacuum circuit breaker according to claim 1, characterized in that: The isolating switch electric operating mechanism comprises a first motor, which drives the isolating switch shaft to rotate through a first gear transmission mechanism or a first chain transmission mechanism, and the first motor is electrically connected to the control module.

3. The intelligent vacuum circuit breaker according to claim 2 is characterized in that: The grounding switch includes a grounding switch shaft, a grounding switch knife and a grounding static contact. The grounding switch shaft is rotatably mounted on a frame. One end of the grounding switch knife is connected to the grounding switch shaft. The frame is also provided with a grounding switch electric operating mechanism. The grounding switch electric operating mechanism includes a second motor. The second motor drives the grounding switch shaft to rotate through a second gear transmission mechanism or a second chain transmission mechanism and makes the other end of the grounding switch knife contact or separate with the grounding static contact. The second motor is electrically connected to a control module.

4. The intelligent vacuum circuit breaker according to claim 3 is characterized in that: The sealed pole is arranged on the frame in the horizontal direction, and the two ends of the sealed pole are respectively a first end and a second end, and the first end and the second end are respectively located on opposite sides of the frame, one end of the circuit breaker moving contact is located in the vacuum arc chamber, and the other end of the circuit breaker moving contact passes through one end of the vacuum arc chamber and extends to the outside of the first end of the sealed pole, and the circuit breaker static contact is installed inside the other end of the vacuum arc chamber, the circuit breaker static contact is connected to one end of the first lead, and the other end of the first lead passes through the second end of the sealed pole, the first lead is wrapped in the insulating shell of the sealed pole, and the other end of the first lead is hinged to one end of the disconnector knife switch.

5. The intelligent vacuum circuit breaker according to claim 4 is characterized in that: The operating spindle is located on the side of the first end of the frame close to the sealed pole, the operating spindle is fixedly connected to one end of the first crank arm, the other end of the first crank arm is hinged to one end of the insulating pull rod, the other end of the insulating pull rod is hinged to one end of the second crank arm, the middle part of the second crank arm is hinged to a bracket, the bracket is fixed on the first end of the sealed pole, the other end of the second crank arm is hinged to the other end of the moving contact of the circuit breaker, and the operating spindle drives the moving contact of the circuit breaker to contact or separate with the static contact of the circuit breaker through the first crank arm, the insulating pull rod and the second crank arm.

6. The intelligent vacuum circuit breaker according to claim 5, characterized in that: A pressure sensor is fixedly provided at one end of the insulating pull rod, and the pressure sensor is hinged to the other end of the first crank arm.

7. The intelligent vacuum circuit breaker according to claim 6, characterized in that: The isolating switch shaft is located on the second end side of the frame close to the sealed pole, the isolating switch shaft is fixedly connected to one end of the third crank arm, the other end of the third crank arm is hinged to one end of the insulating push rod, the other end of the insulating push rod is hinged to the isolating switch knife switch, and the isolating switch shaft drives the other end of the isolating switch knife switch to contact or separate with the isolating static contact through the third crank arm and the insulating push rod.

8. The intelligent vacuum circuit breaker according to claim 7, characterized in that: The isolating static contact is fixed on a first insulating support post, and the first insulating support post is fixed on a side of the second end of the frame close to the sealed pole.

9. The intelligent vacuum circuit breaker according to claim 8, characterized in that: The other end of the circuit breaker moving contact is fixedly connected with a second lead wire, the second lead wire is supported on a second insulating support, and the second insulating support is fixedly arranged on one side of the first end of the frame close to the sealed pole.

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