An electric intelligent monitoring drop-out fuse

Abstract

This invention discloses an electrically powered intelligent monitoring drop-out fuse, relating to the field of protective fuse technology. The electrically powered intelligent monitoring drop-out fuse includes an insulating support post and an arc-blocking isolation device at its top, and further includes: a fuse carrier support mounted on the bottom of the insulating support post; a fuse carrier disposed on one side of the insulating support post, with its bottom end rotatably connected to the bottom of the insulating support post via the fuse carrier support post; and a push-pull drive mechanism mounted and sleeved on the insulating support post, driving the fuse carrier to swing via a push-pull method. The push-pull drive mechanism uses an impact-type drive assembly for sliding. The fuse's opening and closing drive method has been improved by using a concave cam impact method for pushing out, resulting in fast opening speed and rapid disconnection. It also includes a power storage structure for storing power, which is released during opening, further assisting the impact-type drive assembly in applying driving force, thus further accelerating the opening speed and improving response speed.

Description

Technical Field

[0001] The invention relates to the technical field of drop-out fuses, in particular to an electric intelligent monitoring drop-out fuse. Background Art

[0002] Drop-out fuses are an important component of electrical systems and play a key role in ensuring safe and stable operation of circuits. They can effectively prevent electrical equipment from being damaged due to overload, short circuit, etc., and even cause dangerous situations such as fire. The working principle of drop-out fuses is mainly based on current detection and circuit breaker protection mechanism. When the current in the circuit exceeds the set value, the drop-out fuse will detect this abnormal situation and quickly cut off the power supply to prevent the circuit from continuing to work and causing damage.

[0003] The current opening and closing driving method of the drop-out fuse is usually driven by a push-pull drive using a sprocket chain, a gear rack, etc. For example, the mechanical structure of an intelligent drop-out fuse for wind power generation disclosed in publication number CN118983206A and the outdoor horizontally controlled automatic drop-out fuse disclosed in CN102737923A both achieve opening and closing directly through motor drive. However, since the speed of the motor increases from zero when it starts and there will be resistance when it is turned on, the instantaneous speed is insufficient. For situations where emergency opening and disconnection is required due to power failure, the response speed of this method is still insufficient and needs to be improved. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides an electric intelligent monitoring drop-out fuse, which solves the problem that the prior art still has insufficient response speed when opening the circuit breaker.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an electric intelligent monitoring drop-out fuse, including an insulating support and an isolation arc protection device arranged at the top thereof, and also including:

[0006] The fuse support is installed at the bottom of the insulating support;

[0007] The fuse carrier is arranged on one side of the insulating support, and the bottom end is rotatably connected to the bottom end of the insulating support through a fuse carrier support; the fuse carrier support is triggered and sends a signal when the fuse carrier fails and falls, and the fuse carrier is contact-connected with the isolation arc protection device to achieve closing when the fuse carrier is erected, and the top end of the fuse carrier is separated from the isolation arc protection device to achieve opening when the fuse carrier is laid down;

[0008] The push-pull drive mechanism is installed and sleeved on the insulating support, and drives the fuse carrier to swing by push-pull mode;

[0009] The push-pull drive mechanism is driven to slide by an impact drive assembly. A motor cover covering the impact drive assembly is installed above one end of the push-pull drive mechanism, and a battery pack for powering the impact drive assembly is plugged into a corner of the motor cover. The battery pack carries a constant charging module and a battery protection module. A force storage structure is also installed at the bottom of the motor cover and at the end of the push-pull drive mechanism. The force storage structure stores force when the push-pull drive mechanism pulls the return gate, and releases force to apply auxiliary thrust when the opening gate is pushed out.

[0010] Preferably, the push-pull drive mechanism comprises:

[0011] The motor cover bottom plate is fixed to one side of the insulating support;

[0012] A motor mounting plate, fixed to the top of the motor cover bottom plate, for mounting a push-pull drive mechanism;

[0013] A transmission rack is slidably arranged between the motor cover bottom plate and the motor mounting plate, and the push-pull drive mechanism drives the transmission rack to slide;

[0014] A mechanical push-pull tube, one end of which is fixed to the transmission rack through an I-shaped connecting block and is sleeved outside the insulating support;

[0015] The movable hook for carrying the melt is rotatably connected to the other end of the mechanical push-pull tube and is used to hook and hang the middle section of the melt;

[0016] Two sets of limit switches are installed at the bottom of the motor mounting plate, and protrusions are arranged on both sides of the inner wall of the I-shaped connecting block. The two protrusions trigger the two sets of limit switches respectively during the pushing and pulling process of the I-shaped connecting block.

[0017] Preferably, the impact-type drive assembly includes a high-speed motor, a cam is fixedly connected to the motor shaft of the high-speed motor, and a transmission gear is rotatably provided on the motor shaft of the high-speed motor and below the cam, a tooth groove meshing with the transmission gear is provided on the inner side of the transmission rack, a convex shaft is eccentrically provided on the top surface of the transmission gear, and an arc groove matching the convex shaft is provided on the bottom surface of the cam, and when the cam rotates, it hits the convex shaft through the arc groove to cause the transmission gear to rotate instantly.

[0018] Preferably, the fuse carrier includes a fuse tube, and the upper and lower ends of the fuse tube are respectively fixedly sleeved with a fuse tube upper sleeve and a fuse tube lower sleeve, and the top of the fuse tube upper sleeve is fixedly connected with a fuse carrier copper cap, and the middle of the fuse tube is fixedly connected with a fuse tube fixing hook, and the fuse tube fixing hook and the fuse carrier movable hook are hooked with each other, and the surface of the fuse tube is fixedly sleeved with a status monitoring device for monitoring the opening and closing status of the equipment.

[0019] Preferably, the fuse carrier support includes a fuse carrier hook fixed to the bottom end of the insulating support, the lower sleeve of the fuse tube is rotatably mounted on the fuse carrier hook through the lower contact, the bottom of the lower contact is also rotatably connected to a contact piece through an axis-coordinated torsion spring, the bottom end of the lower contact is bound with a fuse, and the other end of the fuse extends from the bottom of the contact piece to the inside of the fuse tube and is connected to a status monitoring device, when the fuse blows, the status monitoring device sends a corresponding electrical signal, the lower contact is lever-shaped, the middle is rotatably connected to the fuse carrier hook, and the two ends of the lower contact are respectively connected to the fuse tube and the fuse, so that the fuse pulls the lower contact to lift the fuse tube under tension, and when the fuse blows, the lower contact loses its supporting force and causes the fuse tube to fall naturally.

[0020] Preferably, the isolation and arc protection device includes an arc protection cover, the bottom of the arc protection cover is fixedly connected with a phosphor copper sheet of a fuse-carrying copper cap, and the phosphor copper sheet of the fuse-carrying copper cap is used to be electrically connected when it conflicts with the fuse-carrying copper cap. A rainproof cover covering the phosphor copper sheet of the fuse-carrying copper cap is also installed inside the isolation and arc protection device, and the top of the arc protection cover is fixedly connected with a circuit box.

[0021] Preferably, the force storage structure includes a socket plugged into the bottom of the motor cover, and one side of the socket is provided with upper and lower clamping plates for positioning the transmission rack, a force storage spring is inserted into the socket, and an end cover is fixed to the outer end of the socket.

[0022] Preferably, a circuit board is installed inside the circuit box, and the circuit board is integrated with a Beidou satellite positioning module, a current detection device, a line loss module and a communication module. The communication module is used to transmit the electrical signal to the control end via the Internet. A voltage detection module and a voltage energy acquisition module are respectively installed on the upper and lower end sides of the insulating pillar. The current detection device and the voltage detection module are used to detect the current and voltage of the line or transformer substation, and calculate the zero-sequence grounding fault and transient fault recording function of the line or transformer substation through the line loss module. The voltage energy acquisition module is used to power the equipment.

[0023] Preferably, the current and voltage data collection content includes:

[0024] Current detection device collects current data: uses high-precision current transformer to detect the phase current (I a , I b , I c ) and zero sequence current I 0 , the zero-sequence current is obtained by the sum of the three-phase currents, that is, I 0 =I a +I b +I c ;

[0025] The voltage detection module collects voltage data: It uses a voltage transformer to detect the phase voltage (V a , Vb , V c ) and zero sequence voltage V 0 , the zero-sequence voltage is obtained by the average value of the three-phase voltage or a special zero-sequence voltage transformer;

[0026] After the current and voltage values ​​are acquired, data preprocessing is performed, including:

[0027] Filtering and denoising: Filter the collected current and voltage data to remove high-frequency noise and interference;

[0028] Calibration and scaling: converting the collected data into actual physical quantities and scaling them as needed;

[0029] The zero-sequence grounding fault detection step comprises:

[0030] Zero-sequence current threshold judgment: Set a zero-sequence current threshold I threshold ,When it is detected that the zero sequence current exceeds the zero sequence current threshold, it is preliminarily determined that a zero sequence grounding fault may have occurred;

[0031] Zero-sequence voltage auxiliary judgment: monitor the zero-sequence voltage at the same time. If the zero-sequence voltage also exceeds the set threshold V threshold , it is confirmed that there is a zero-sequence grounding fault;

[0032] Fault location: Compare the waveforms of each phase current and voltage, as well as the changing trends of zero-sequence current and voltage, to preliminarily determine the location of the fault;

[0033] The steps for implementing the transient fault recording function include:

[0034] Trigger conditions: set the conditions for triggering recording, including zero-sequence current exceeding the set threshold, voltage sag or surge, etc.

[0035] Recording parameters: determine the recording parameters, including sampling rate, recording time, and storage format;

[0036] Waveform data storage: store the triggered current and voltage waveform data in a specified location for subsequent analysis;

[0037] Fault analysis and diagnosis include:

[0038] Waveform analysis: Analyze the recorded current and voltage waveforms to observe the changing trends and characteristics of the waveforms;

[0039] Fault current calculation: Use the current data before and after the fault to calculate the magnitude and direction of the fault current;

[0040] Fault impedance calculation: By measuring the voltage and current data before and after the fault, the fault impedance is calculated to further determine the nature and location of the fault;

[0041] Fourier transform: Perform Fourier transform on the recorded waveform data to obtain spectrum information;

[0042] Fault diagnosis: Combine waveform analysis, mathematical calculations or expert system methods to diagnose and classify faults.

[0043] Preferably, a circuit board is installed inside the circuit box, and a Beidou satellite positioning module, a current detection device, a line loss module and a communication module are integrated on the circuit board. The communication module is used to transmit the electrical signal to the control end via the network.

[0044] The present invention provides an electric intelligent monitoring drop-out fuse. Compared with the prior art, it has the following beneficial effects:

[0045] 1. This electric intelligent monitoring drop-out fuse has improved the opening and closing drive mode of the traditional fuse. It adopts the concave cam impact method to push out, with a fast opening speed and can achieve rapid disconnection. At the same time, a force storage structure is provided to store force, which is released when the opening is pushed out, and can further assist the impact drive component to apply driving force, that is, further speed up the opening speed and fast response speed;

[0046] 2. The push-pull drive mechanism of the electric intelligent monitoring drop-out fuse is driven by gear rack meshing. The traditional gear is directly connected to the motor, but the cam is used for transfer. The 180° arc groove cooperates with the convex shaft to reserve space for the high-speed motor to speed up. After the speed is increased, it can be impacted instantly, and then the transmission rack is pushed out instantly. The opening speed is fast, and the structure is simple and easy to process.

[0047] 3. The electric intelligent monitoring drop-out fuse has a bottom of the fuse carrier that rotates with the fuse carrier support by hooking, and is connected to the push-pull drive mechanism by hanging in the middle, which is convenient for connecting and disconnecting with the push-pull drive mechanism. The setting of the lower contact lever structure cooperates with the tightening of the fuse wire, so that when the fuse wire blows, the fuse carrier can automatically drop to realize the tripping, thereby realizing the detection and prompt effect of the fault drop, and ensuring the safe and normal use of the fuse.

[0048] 4. The electric intelligent monitoring drop-out fuse has a transmission rack that can gradually squeeze the force storage spring during the return process to achieve the force storage effect. During the opening process, the squeezed force storage spring can be released to release the elastic force. The structure is simple and practical, and the force storage structure can be directly plugged into the bottom of the motor cover, which is also simple and convenient to install.

[0049] 5. The electric intelligent monitoring drop-out fuse can detect zero-sequence grounding faults efficiently and accurately through the integrated current detection device, voltage detection module and line loss module, and record the fault waveform data using the transient fault recording function. This system not only improves the sensitivity of fault detection, but also provides detailed data support for fault analysis and diagnosis through waveform analysis, fault current and impedance calculation, and Fourier transform. In addition, the system's alarm and recording functions ensure the timely transmission and storage of fault information, facilitate subsequent analysis and summary, and effectively improve the stability and safety of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is an assembly diagram of the present invention;

[0051] Figure 2 It is a partial exploded view of the present invention;

[0052] Figure 3 It is a front view of the present invention;

[0053] Figure 4 It is a schematic diagram of the push-pull drive mechanism of the present invention;

[0054] Figure 5 It is a structural schematic diagram of the cam and the transmission gear of the present invention;

[0055] Figure 6 It is a schematic diagram of the protrusion and the limit switch of the present invention;

[0056] Figure 7 It is a connection schematic diagram of the fuse carrier support of the fuse carrier of the present invention;

[0057] Figure 8 It is a right isometric view of the fuse carrier support of the present invention;

[0058] Fig. 9 It is an exploded view of the power storage structure of the present invention.

[0059] In the figure: 1-insulating support, 11-voltage detection module, 12-voltage energy acquisition module;

[0060] 2-Isolation arc protection device, 21-arc protection cover, 22-Carrying fuse copper cap phosphor copper sheet, 23-Rainproof cover, 24-Circuit box, 25-Current detection device;

[0061] 3- fuse support, 31- fuse hook, 32- lower contact, 33- contact piece;

[0062] 4-fusible component, 41-fusible tube, 42-fusible tube upper sleeve, 43-fusible tube lower sleeve, 44-fusible component copper cap, 45-fusible tube fixing hook, 46-status monitoring device;

[0063] 5-push-pull drive mechanism, 51-impact drive assembly, 511-high-speed motor, 512-cam, 513-transmission gear, 514-convex shaft, 515-arc groove, 52-motor cover bottom plate, 53-motor mounting plate, 54-transmission rack, 55-mechanical push-pull tube, 551-protrusion, 56-carrying fuse movable hook, 57-limit switch;

[0064] 6-motor cover, 61-battery pack;

[0065] 7-force storage structure, 71-socket, 72-force storage spring, 73-end cover. DETAILED DESCRIPTION

[0066] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0067] The present invention provides five technical solutions:

[0068] Figure 1-Figure 2 The first embodiment is shown: an electric intelligent monitoring drop-out fuse, comprising an insulating support 1 and an isolation arc protection device 2 arranged at the top thereof, and further comprising:

[0069] The fuse support 3 is installed at the bottom end of the insulating support 1;

[0070] The fuse carrier 4 is arranged on one side of the insulating support 1, and the bottom end is rotatably connected to the bottom end of the insulating support 1 through the fuse carrier support 3; the fuse carrier support 3 is triggered and sends a signal when the fuse carrier 4 fails and falls, and the fuse carrier 4 is contact-connected with the isolation arc protection device 2 to achieve closing when it is erected, and the top of the fuse carrier 4 is separated from the isolation arc protection device 2 to achieve opening when it is laid down;

[0071] The push-pull driving mechanism 5 is installed and sleeved on the insulating support 1, and drives the fuse carrier 4 to swing by push-pull mode;

[0072] The push-pull drive mechanism 5 is driven to slide by an impact drive assembly 51. A motor cover 6 covering the impact drive assembly 51 is installed above one end of the push-pull drive mechanism 5, and a battery pack 61 for supplying power to the impact drive assembly 51 is plugged into a corner of the motor cover 6. The battery pack 61 is loaded with a constant charge module and a battery protection module. The battery pack 61 is installed in a plug-in manner and can be directly unplugged and replaced with a new battery pack 61. The embedded battery pack 61 is connected to the motor in a close distance, which solves the resistance loss caused by the long distance of the connecting line and improves the speed and stability of the motor transmission.

[0073] A force storage structure 7 is also installed at the bottom of the motor cover 6 and at the end of the push-pull drive mechanism 5. The force storage structure 7 stores force when the push-pull drive mechanism 5 pulls the return gate, and releases force to apply auxiliary thrust when the open gate is pushed out.

[0074] The present invention improves the opening and closing driving method of the traditional fuse, and adopts a concave cam impact method to push out, with a fast opening speed and can achieve rapid disconnection. At the same time, a force storage structure 7 is provided to store force, which is released when the opening is pushed out, and can further assist the impact-type drive component 51 to apply driving force, that is, further accelerate the opening speed and the response speed is fast.

[0075] Figure 3-Figure 6 A second embodiment is shown, which is mainly different from the first embodiment in that the push-pull drive mechanism 5 comprises:

[0076] The motor cover bottom plate 52 is fixed to one side of the insulating support 1;

[0077] The motor mounting plate 53 is fixed to the top of the motor cover bottom plate 52 and is used to install the push-pull drive mechanism 5;

[0078] The transmission rack 54 is slidably disposed between the motor cover bottom plate 52 and the motor mounting plate 53, and the push-pull drive mechanism 5 drives the transmission rack 54 to slide;

[0079] A mechanical push-pull tube 55, one end of which is fixed to the transmission rack 54 through an I-shaped connecting block 58, and is sleeved outside the insulating support 1;

[0080] The movable hook 56 for carrying the melt is rotatably connected to the other end of the mechanical push-pull tube 55 and is used for hooking and hanging the middle section of the melt 4;

[0081] Two groups of limit switches 57 are installed at the bottom of the motor mounting plate 53, and protrusions 551 are provided on both sides of the inner wall of the I-shaped connecting block 58. The two protrusions 551 trigger the two groups of limit switches 57 respectively during the pushing and pulling process of the I-shaped connecting block 58. The two limit switches 57 are divided into a closing limit switch and an opening limit switch. By using two limit switches 57, one limit switch 57 can be triggered respectively during the opening and closing stroke, thereby sending out different electrical signals, and accurately judging the opening and closing status.

[0082] The impact drive assembly 51 includes a high-speed motor 511, a cam 512 is fixedly connected to the motor shaft of the high-speed motor 511, and a transmission gear 513 is rotatably provided on the motor shaft of the high-speed motor 511 and below the cam 512. A tooth groove meshing with the transmission gear 513 is provided on the inner side of the transmission rack 54, and a convex shaft 514 is eccentrically provided on the top surface of the transmission gear 513, and an arc groove 515 adapted to the convex shaft 514 is provided on the bottom surface of the cam 512, and the arc groove 515 is a 180° groove. When the cam 512 rotates, the arc groove 515 hits the convex shaft 514 to cause the transmission gear 513 to rotate instantly.

[0083] The push-pull drive mechanism 5 is driven by gear rack meshing, and the traditional gear is directly connected to the motor, but is replaced by a cam 512 for transfer. The 180° arc groove 515 cooperates with the convex shaft 514 to reserve space for the high-speed motor 511 to speed up. After the speed is increased, an instantaneous impact can be performed, and the transmission rack 54 is instantly pushed out. The gate opening speed is fast, and the structure is simple and easy to process.

[0084] Figure 2 and Figure 7-Figure 8 A third embodiment is shown, which mainly differs from the first embodiment in that: the fuse carrier 4 includes a fuse tube 41, the upper and lower ends of which are respectively fixedly sleeved with a fuse tube upper sleeve 42 and a fuse tube lower sleeve 43, and the top of the fuse tube upper sleeve 42 is fixedly connected with a fuse carrier copper cap 44, the middle of the fuse tube 41 is fixedly connected with a fuse tube fixing hook 45, the fuse tube fixing hook 45 and the fuse carrier movable hook 56 are hooked with each other, and the fuse carrier movable hook 56 can be manually rotated to disengage from the fuse tube fixing hook 45, and the surface of the fuse tube 41 is fixedly sleeved with a status monitoring device 46 for monitoring the opening and closing status of the equipment.

[0085] The fuse carrier support 3 includes a fuse carrier hook 31 fixed to the bottom end of the insulating support 1, and the fuse tube lower sleeve 43 is rotatably installed on the fuse carrier hook 31 through the lower contact 32. The bottom of the lower contact 32 is also rotatably connected with a contact piece 33 through an axis and a torsion spring. The bottom end of the lower contact 32 is bound with a fuse 34, and the other end of the fuse 34 extends from the bottom of the contact piece 33 to the inside of the fuse tube 41 and is connected to the status monitoring device 46. The contact piece 33 presses the fuse 34 under the action of the torsion spring to achieve tension. When the fuse 34 is blown, the status monitoring device 46 sends a corresponding electrical signal. The lower contact 32 is lever-shaped and rotatably connected to the fuse carrier hook 31 in the middle, and the two ends of the lower contact 32 are respectively connected to the fuse tube 41 and the fuse 34, so that the fuse 34 pulls the lower contact 32 to lift the fuse tube 41 under the tension force. When the fuse 34 is blown, the lower contact 32 loses its supporting force and causes the fuse tube 41 to fall naturally.

[0086] The arc-proof device 2 includes an arc-proof cover 21, and the bottom of the arc-proof cover 21 is fixedly connected with a copper cap phosphor copper sheet 22 of a fuse carrier. The copper cap phosphor copper sheet 22 of the fuse carrier is an elastic metal sheet. The copper cap phosphor copper sheet 22 of the fuse carrier is used to electrically connect with the copper cap 44 of the fuse carrier when it conflicts. A rainproof cover 23 covering the copper cap phosphor copper sheet 22 of the fuse carrier is also installed inside the arc-proof device 2. The top of the arc-proof cover 21 is fixedly connected with a circuit box 24. A circuit board is installed inside the circuit box 24. The circuit board is integrated with a Beidou satellite positioning module, a current detection device 25, a line loss module and a communication module. The communication module is used to transmit the electrical signal to the control end through the network. The Beidou satellite positioning system is installed to accurately locate the transformer substation equipment when a fault occurs. Shorter time is gained for emergency repair of equipment failures. The circuit box 24 can also be connected to a sensor to collect parameters such as temperature, air pressure, vibration, and liquid level of the transformer to realize transformer failure warning, and data can be uploaded remotely through the Internet of Things.

[0087] The bottom of the fuse carrier 4 rotates with the fuse carrier support 3 by a hooking manner, and is connected to the push-pull drive mechanism 5 by a hanging manner in the middle, which is convenient for connecting and disconnecting with the push-pull drive mechanism 5, and the setting of the lever-type structure of the lower contact 32 cooperates with the tightening of the fuse 34, so that when the fuse 34 blows, the fuse carrier 4 can automatically fall to achieve opening, thereby realizing the detection and prompt effect of fault falling, and ensuring the safe and normal use of the fuse.

[0088] Fig. 9 A fourth embodiment is shown, and its main difference from the first embodiment is that the force storage structure 7 includes a socket 71 plugged into the bottom of the motor cover 6, and one side of the socket 71 is provided with upper and lower clamping plates for positioning the transmission rack 54, a force storage spring 72 is inserted into the socket 71, and an end cover 73 is fixed to the outer end of the socket 71.

[0089] The transmission rack 54 can gradually squeeze the force storage spring 72 during the return process to achieve the force storage effect. During the gate opening process, the squeezed force storage spring 72 can bounce open to release the elastic force. The structure is simple and practical, and the force storage structure 7 can be directly plugged into the bottom of the motor cover 6, and the installation is also simple and convenient.

[0090] Figure 2-Figure 3 The fifth embodiment is shown, which is mainly different from the first embodiment in that: the upper and lower sides of the insulating support 1 are respectively installed with a voltage detection module 11 and a voltage energy acquisition module 12, the current detection device 25 and the voltage detection module 11 are respectively used to detect the current and voltage of the line or transformer substation, and the zero-sequence grounding fault and transient fault recording function of the line or transformer substation are calculated through the line loss module, and the voltage energy acquisition module is used to power the equipment;

[0091] Current and voltage data collection includes:

[0092] The current detection device 25 collects current data: uses a high-precision current transformer to detect the phase current I of the line or transformer station area a , I b , I c and zero sequence current I 0 , the zero-sequence current is obtained by the sum of the three-phase currents, that is, I 0 =I a +I b +I c ;

[0093] The voltage detection module 11 collects voltage data: uses a voltage transformer to detect the phase voltage V of the line or transformer area a , V b , V c and zero sequence voltage V 0 , the zero-sequence voltage is obtained by the average value of the three-phase voltage or a special zero-sequence voltage transformer;

[0094] After the current and voltage values ​​are acquired, data preprocessing is performed, including:

[0095] Filtering and denoising: Filter the collected current and voltage data to remove high-frequency noise and interference;

[0096] Calibration and scaling: converting the collected data into actual physical quantities and scaling them as needed;

[0097] The detection steps of zero-sequence ground fault include:

[0098] Zero-sequence current threshold judgment: Set a zero-sequence current threshold I threshold ,When it is detected that the zero sequence current exceeds the zero sequence current threshold, it is preliminarily determined that a zero sequence grounding fault may have occurred;

[0099] Zero-sequence voltage auxiliary judgment: monitor the zero-sequence voltage at the same time. If the zero-sequence voltage also exceeds the set threshold V threshold , it is confirmed that there is a zero-sequence grounding fault;

[0100] Fault location: Compare the waveforms of each phase current and voltage, as well as the changing trends of zero-sequence current and voltage, to preliminarily determine the location of the fault;

[0101] The steps to implement the transient fault recording function include:

[0102] Trigger conditions: set the conditions for triggering recording, including zero-sequence current exceeding the set threshold, voltage sag or surge, etc.

[0103] Recording parameters: determine the recording parameters, including sampling rate, recording time, and storage format;

[0104] Waveform data storage: store the triggered current and voltage waveform data in a specified location for subsequent analysis;

[0105] Fault analysis and diagnosis include:

[0106] Waveform analysis: Analyze the recorded current and voltage waveforms to observe the changing trends and characteristics of the waveforms;

[0107] Fault current calculation: Use the current data before and after the fault to calculate the magnitude and direction of the fault current;

[0108] Fault impedance calculation: By measuring the voltage and current data before and after the fault, the fault impedance is calculated to further determine the nature and location of the fault;

[0109] Fourier transform: Perform Fourier transform on the recorded waveform data to obtain spectrum information, which helps to identify the fault type and harmonic components;

[0110] Fault diagnosis: Combine waveform analysis, mathematical calculations or expert system methods to diagnose and classify faults;

[0111] Alarm and Recording

[0112] Alarm function: When a zero-sequence grounding fault or transient fault is detected, the alarm function is triggered to notify relevant personnel to handle it;

[0113] Fault record: record the time, location, type and other information of the fault for subsequent analysis and summary.

[0114] Through the integrated current detection device 25, voltage detection module 11 and line loss module, zero-sequence grounding faults can be detected efficiently and accurately, and the transient fault recording function can be used to record the fault waveform data. This system not only improves the sensitivity of fault detection, but also provides detailed data support for fault analysis and diagnosis through waveform analysis, fault current and impedance calculation, and Fourier transform. In addition, the alarm and recording functions of the system ensure the timely transmission and storage of fault information, facilitate subsequent analysis and summary, and effectively improve the stability and safety of the power system.

[0115] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0116] When opening the gate, the high-speed motor 511 is controlled to drive the cam 512 to rotate rapidly, and the arc groove 515 is used to hit the convex shaft 514 to drive the transmission gear 513 to rotate, thereby pushing the transmission rack 54 to slide, and pushing the mechanical push-pull tube 55 and the fuse carrier movable hook 56 to slide, and the fuse carrier movable hook 56 pushes the fuse carrier 4 to swing, so that the top fuse carrier copper cap 44 is separated from the fuse carrier copper cap phosphor copper sheet 22, thereby achieving the opening of the gate; in the process of opening the gate, as the transmission rack 54 slides, the force storage spring 72 releases the elastic force synchronously to assist in pushing out the transmission rack 54; when the I-shaped connecting block 58 slides to one side of the protrusion 551 and contacts one of the limit switches 57, a corresponding electrical signal is sent to control the high-speed motor 511 to stop working;

[0117] When closing the circuit breaker, the high-speed motor 511 is started in reverse, and the mechanical push-pull tube 55 and the movable hook 56 of the fuse carrier are pulled back in reverse according to the above steps, and the fuse carrier 4 is pulled back by the movable hook 56 of the fuse carrier, so that the fuse carrier copper cap 44 contacts the phosphor copper sheet 22 of the fuse carrier copper cap again to complete the closing of the circuit breaker, and in this process, the transmission rack 54 squeezes the force storage spring 72 to store force; when the protrusion 551 on the other side of the I-shaped connecting block 58 contacts another limit switch 57, a corresponding electrical signal is sent to control the high-speed motor 511 to stop working.

[0118] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0119] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric intelligent monitoring drop-out fuse, comprising an insulating support and an isolation arc protection device arranged at the top thereof, characterized in that: Also includes: The fuse support is installed at the bottom of the insulating support; The fuse carrier is arranged on one side of the insulating support, and the bottom end is rotatably connected to the bottom end of the insulating support through a fuse carrier support; the fuse carrier support is triggered and sends a signal when the fuse carrier fails and falls, and the fuse carrier is contact-connected with the isolation arc protection device to achieve closing when the fuse carrier is erected, and the top end of the fuse carrier is separated from the isolation arc protection device to achieve opening when the fuse carrier is laid down; The push-pull drive mechanism is installed and sleeved on the insulating support, and drives the fuse carrier to swing by push-pull mode; The push-pull drive mechanism adopts an impact drive assembly to drive the sliding movement. A motor cover covering the impact drive assembly is installed above one end of the push-pull drive mechanism, and a battery pack for supplying power to the impact drive assembly is plugged into a corner of the motor cover. The battery pack carries a constant charge module and a battery protection module. A force storage structure is also installed at the bottom of the motor cover and at the end of the push-pull drive mechanism. The force storage structure stores force when the push-pull drive mechanism pulls the return gate, and releases force to apply auxiliary thrust when the open gate is pushed out. The push-pull drive mechanism comprises: The motor cover bottom plate is fixed to one side of the insulating support; A motor mounting plate, fixed to the top of the motor cover bottom plate, for mounting a push-pull drive mechanism; A transmission rack is slidably arranged between the motor cover bottom plate and the motor mounting plate, and the push-pull drive mechanism drives the transmission rack to slide; A mechanical push-pull tube, one end of which is fixed to the transmission rack through an I-shaped connecting block and is sleeved outside the insulating support; The movable hook for carrying the melt is rotatably connected to the other end of the mechanical push-pull tube and is used to hook and hang the middle section of the melt; Two sets of limit switches are installed at the bottom of the motor mounting plate, and protrusions are provided on both sides of the inner wall of the I-shaped connecting block. The two protrusions trigger the two sets of limit switches respectively during the pushing and pulling process of the I-shaped connecting block; The impact-type driving assembly includes a high-speed motor, a cam is fixedly connected to the motor shaft of the high-speed motor, and a transmission gear is rotatably provided on the motor shaft of the high-speed motor and below the cam. A tooth groove meshing with the transmission gear is provided on one side of the inner side of the transmission rack, a convex shaft is eccentrically provided on the top surface of the transmission gear, and an arc groove matched with the convex shaft is provided on the bottom surface of the cam. When the cam rotates, it hits the convex shaft through the arc groove to cause the transmission gear to rotate instantly.

2. The electric intelligent monitoring drop-out fuse according to claim 1 is characterized in that: The fuse carrier comprises a fuse tube, and an upper fuse tube sleeve and a lower fuse tube sleeve are fixedly sleeved on the upper and lower ends of the fuse tube respectively, and a fuse carrier copper cap is fixedly connected to the top of the fuse tube sleeve, and a fuse tube fixing hook is fixedly connected to the middle of the fuse tube, and the fuse tube fixing hook is hooked with the fuse carrier movable hook, and a status monitoring device is fixedly sleeved on the surface of the fuse tube for monitoring the opening and closing status of the equipment.

3. The electric intelligent monitoring drop-out fuse according to claim 2 is characterized in that: The fuse support includes a fuse hook fixed to the bottom end of the insulating support, the lower sleeve of the fuse tube is rotatably installed on the fuse hook through the lower contact, the bottom of the lower contact is also rotatably connected to a contact piece through an axis and a torsion spring, the bottom end of the lower contact is bound with a fuse, and the other end of the fuse extends from the bottom of the contact piece to the inside of the fuse tube and is connected to a status monitoring device, when the fuse blows, the status monitoring device sends a corresponding electrical signal, the lower contact is lever-shaped, and the middle is rotatably connected to the fuse hook, and the two ends of the lower contact are respectively connected to the fuse tube and the fuse, so that the fuse pulls the lower contact to lift the fuse tube under tension, and when the fuse blows, the lower contact loses its supporting force and causes the fuse tube to fall naturally.

4. The electric intelligent monitoring drop-out fuse according to claim 1 is characterized in that: The isolation and arc protection device includes an arc protection cover, the bottom of which is fixedly connected to a phosphor copper sheet of a fuse-carrying copper cap, and the phosphor copper sheet of the fuse-carrying copper cap is used to be electrically connected when it collides with the fuse-carrying copper cap. A rainproof cover covering the phosphor copper sheet of the fuse-carrying copper cap is also installed inside the isolation and arc protection device, and a circuit box is fixedly connected to the top of the arc protection cover.

5. The electric intelligent monitoring drop-out fuse according to claim 1 is characterized in that: The force storage structure includes a socket plugged into the bottom of the motor cover, and one side of the socket is provided with upper and lower clamping plates for positioning the transmission rack, a force storage spring is inserted into the socket, and an end cover is fixed to the outer end of the socket.

6. The electric intelligent monitoring drop-out fuse according to claim 4, characterized in that: A circuit board is installed inside the circuit box, and the circuit board is integrated with a Beidou satellite positioning module, a current detection device, a line loss module and a communication module. The communication module is used to transmit the electrical signal to the control end via the network. A voltage detection module and a voltage energy acquisition module are respectively installed on the upper and lower end sides of the insulating pillar. The current detection device and the voltage detection module are used to detect the current and voltage of the line or transformer substation, and calculate the zero-sequence grounding fault and transient fault recording function of the line or transformer substation through the line loss module. The voltage energy acquisition module is used to power the equipment.

7. The electric intelligent monitoring drop-out fuse according to claim 6, characterized in that: Current and voltage data collection includes: Current detection device collects current data: uses high-precision current transformer to detect the phase current (I a , I b , I c ) and zero-sequence current I0, which is obtained by the sum of the three-phase currents, that is, I0=I a +I b +I c ; The voltage detection module collects voltage data: It uses a voltage transformer to detect the phase voltage (V a , V b , V c ) and zero-sequence voltage V0, which is obtained by the average value of the three-phase voltage or a special zero-sequence voltage transformer; After the current and voltage values ​​are acquired, data preprocessing is performed, including: Filtering and denoising: Filter the collected current and voltage data to remove high-frequency noise and interference; Calibration and scaling: converting the collected data into actual physical quantities and scaling them as needed; The zero-sequence grounding fault detection step comprises: Zero-sequence current threshold judgment: Set a zero-sequence current threshold I threshold ,When it is detected that the zero sequence current exceeds the zero sequence current threshold, it is preliminarily determined that a zero sequence grounding fault may have occurred; Zero-sequence voltage auxiliary judgment: monitor the zero-sequence voltage at the same time. If the zero-sequence voltage also exceeds the set threshold V threshold , it is confirmed that there is a zero-sequence grounding fault; Fault location: Compare the waveforms of each phase current and voltage, as well as the changing trends of zero-sequence current and voltage, to preliminarily determine the location of the fault; The steps for implementing the transient fault recording function include: Trigger conditions: set the conditions for triggering recording, including zero-sequence current exceeding the set threshold, voltage sag or surge; Recording parameters: determine the recording parameters, including sampling rate, recording time, and storage format; Waveform data storage: store the triggered current and voltage waveform data in a specified location for subsequent analysis; Fault analysis and diagnosis include: Waveform analysis: Analyze the recorded current and voltage waveforms to observe the changing trends and characteristics of the waveforms; Fault current calculation: Use the current data before and after the fault to calculate the magnitude and direction of the fault current; Fault impedance calculation: By measuring the voltage and current data before and after the fault, the fault impedance is calculated to further determine the nature and location of the fault; Fourier transform: Perform Fourier transform on the recorded waveform data to obtain spectrum information; Fault diagnosis: Combine waveform analysis, mathematical calculations or expert system methods to diagnose and classify faults.

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