449results about How to "Improve job stability" patented technology

The utility model belongs to the field of agricultural engineering technical field, and disclose a kind of anti-winding straw returning to field rotary tiller, including frame, the one end of frame is equipped with driving motor, and the both sides inner wall of frame is rotatably connected with connecting plate, the one end of two connecting plates is fixedly connected with driving shaft in common, the outer surface of driving shaft is equipped with several rotary tiller blades, the driving shaft includes two circular grooves being opened in driving shaft inner surface, the inner surface of two circular grooves is slidably connected with driving table, the inner surface of two connecting plates is equipped with power motor, the utility model is driven shaft is set, under the action of power motor driving screw rod rotation, driving table slides along circular groove and drives connecting block to push cutting knife to extend from accommodating groove, can actively cut off the straw being wound on driving shaft or rotary tiller blade, avoid the problem of work efficiency decline caused by straw winding, without manual shutdown cleaning, reduce operating cost and work time consumption.

The utility model provides a kind of in-out boat structure and coating equipment, wherein the in-out boat structure includes lifting drive device, for driving at least two translation drive devices synchronous lifting movement;Translation drive device, for driving the corresponding translation movement piece of each translation drive device synchronous reciprocating translation movement;At least two boat moving assemblies, respectively installed on corresponding translation movement piece, the corresponding support paddle of at least two boat moving assemblies is respectively used to move at least two carriers boat into and out of at least two reaction cavities.The in-out boat structure provided by the utility model can move at least two carriers boat into and out of each group of at least two reaction cavities in the height direction of furnace body synchronously layer by layer, shorten the length of reaction cavity and narrow it under the premise of not reducing production capacity, shorten the cantilever length of support paddle of in-out boat structure adaptively, improve the rigidity of cantilever structure, reduce the scratching of carrier boat caused by cantilever deformation and shaking and the failure rate of coating equipment, and improve the working stability of coating equipment.

The present application relates to the technical field of plunger pump, in particular to a variable stroke double cavity plunger pump, which comprises a shell and a driving motor, two delivery pipes are arranged in the shell, two groups of crankshaft assemblies are arranged on the output shaft of the driving motor, the shell is connected with the corresponding delivery pipe through the crankshaft assembly, and a first one-way valve and a second one-way valve are symmetrically arranged in the delivery pipe along the axis of the crankshaft assembly; the one-way valve comprises a reset assembly, a sealing assembly and a clamping assembly arranged in sequence from top to bottom, the sealing of the sealing assembly is realized by the elastic extension of the reset assembly and the adhesion of the clamping assembly; the sealing assembly on the first one-way valve is provided with a first negative pressure assembly, the sealing assembly on the second one-way valve is provided with a second negative pressure assembly, and the first negative pressure assembly and the second negative pressure assembly are oppositely arranged; by arranging the negative pressure disc and the connecting pipe, the stress area of the sealing ball under the negative pressure condition is increased, the opening speed is accelerated, and the fluid passing efficiency is improved.

This invention provides a self-supporting one-dimensional nanorod array composite material, its preparation method, and its application, belonging to the field of clean energy harvesting technology. The preparation method provided by this invention includes the following steps: mixing soluble nickel salt, soluble molybdate, and water, and carrying out a hydrothermal reaction to obtain a NiMo precursor; heat-treating the NiMo precursor and a modifier under a protective atmosphere to obtain the self-supporting one-dimensional nanorod array composite material. Experimental results show that the composite material prepared by the method provided by this invention has excellent electrocatalytic water splitting activity and operational stability, and photo-assisted synthesis further enhances the electrocatalytic water splitting activity of the composite material, making it applicable to solar-driven electrocatalytic water splitting.

The utility model discloses a kind of multi-pass solenoid valve with power connection plate, comprising: multiple valve bodies and power connection plate, each valve body has a pair of same direction projecting insert, the power connection plate includes: multiple metal sheets for the conductive connection of the insert and power supply, and plastic layer covering the metal sheet, the metal sheet has wiring end connected with power supply and insert connection plug-in end, the plastic layer exposes the wiring end and the plug-in end, characterized in that, between adjacent two metal sheets, there is the bending part formed by punching cutting, the plastic layer is provided with at least part recess of covering the bending part, to prevent the rebound of bending part, thereby avoid the short circuit problem that multi-pass solenoid valve appears when working.

The massage eyeshade comprises a body part, a wearing part, a control assembly and a vibration assembly, the wearing part is connected with the body part, the control assembly is connected with the body part through a fastener and located on the outer side of the body part, the vibration assembly is arranged on the body part and located on the inner side of the body part, and the vibration assembly is electrically connected with the control assembly. The massage eyeshade has the advantages of being small in size, high in connection strength and low in cost.

The utility model relates to the technical field of plastic particle production, and discloses a water cooling device for HDPE (high-density polyethylene) plastic particle production, which comprises a cooling box, one end of the cooling box is provided with a circulating water cooling tank, the inner side of the circulating water cooling tank is provided with a rotating roller through a sealing bearing in a penetrating manner, and the outer wall of one side of the cooling box is provided with a first motor through a bolt; and an output shaft of the first motor is connected to one end of the rotating roller, a traction shaft is fixed to the outer wall of the end, away from the first motor, of the rotating roller, the outer wall of the traction shaft is sleeved with a transmission belt, and supporting plates are symmetrically fixed to the inner side surface of the rotating roller. The water cooling device for HDPE plastic particle production is provided with the through grooves, and whether the through grooves are opened or not can be controlled through the baffles capable of being conveniently detached, so that when water cooling operation of a plurality of long plastic strips is carried out at the same time, the long plastic strips are not prone to being mixed and entangled due to impact of water flow or rotation of the rollers, and the quality of plastic particle products is prevented from being affected; the operation stability is improved.

The invention discloses a multi-fuel generator set control system, a control method thereof and a generator set, which are applied to the technical field of generator sets, the multi-fuel generator set control system comprises a multi-fuel generator set and a control system, the control system comprises a fuel change-over switch, an engine starting switch, a carburetor, a fuel gas supply electric control valve, a signal detection module, an ignition device and a control device; a gas fuel supply pipeline of the multi-fuel engine is connected with a gas inlet of the gas supply electric control valve, and a gas outlet of the gas supply electric control valve is connected with a gas fuel inlet of the carburetor. And the signal input end of the fuel type detection circuit is connected with the fuel change-over switch. The temperature sensor is used for detecting a cylinder body temperature signal of the fuel engine and compensating the injection amount of the gas fuel according to the cylinder body temperature signal of the engine. The temperature sensor is used for monitoring the temperature of the cylinder body of the engine in real time, the injection amount of the gas fuel is compensated according to the temperature of the cylinder body of the engine, and the combustion condition in the engine heating process of the engine is stabilized.

The utility model discloses a kind of brown corundum abrasive section sand devices, it is related to a kind of brown corundum abrasive section sand device technical field, including storage box one, the upper end of storage box one is connected with fairing, the lower side of the fairing is installed crushing mechanism, the crushing mechanism is used to crush brown corundum, the inside inclined way of storage box one is fixedly connected with screen, the screen is used to screen after crushing brown corundum, the left end of the left end of conveying pipe one is connected with conveying pipe one in the upside position of the right side surface of storage box one, the right end of the conveying pipe one is connected with conveying mechanism, the conveying mechanism is used to send back larger brown corundum to carry out again crushing, the right side of screen is respectively provided with cam, the upper rotating rod middle part is fixedly connected with rotating roller, the rotating rod on the lower side is fixedly connected with cam, the brown corundum that the rotating roller of rotation is blocked to the right lower rolling of screen, slow down the moving speed of brown corundum, improve the accuracy of screening, improve work efficiency.

The application relates to a quick dismounting structure and method for a heavy mold, and relates to the technical field of mold manufacturing. The quick dismounting structure comprises a mounting mold frame and a heavy mold arranged on the mounting mold frame. The mounting mold frame comprises a lower mold base for supporting the heavy mold, an upper mold frame, and a wedge block assembly wedged between the heavy mold and the mounting mold frame. The heavy mold is provided with an upper mounting portion and a lower mounting portion. The lower mounting portion is provided with a lower guide surface inclined towards both sides of the heavy mold from top to bottom. The upper mold frame is provided with an upper mounting groove matched with the upper mounting portion for locking. The lower mold base is provided with a lower mounting groove matched with the lower mounting portion for locking and a push assembly slidably arranged on both sides of the lower mounting groove. The push assembly comprises an ejection unit arranged on one side of the lower mounting portion and a push-in unit arranged on the other side. The ends of the ejection unit and the push-in unit are respectively parallel to the corresponding lower guide surfaces. The application can improve the quick dismounting effect of the heavy mold and the mold frame support.

This utility model relates to the field of dust and waste conveying technology, and in particular to a closed conveying device for dust and waste from roadheaders and anchorers. It includes a conveying frame, a conveying component, and multiple idlers. The conveying frame has two first conveying rollers symmetrically and rotatably connected to its inner wall. The conveying component includes a conveyor belt tensioned and sleeved on the two first conveying rollers. The working surface of the conveyor belt has a V-shaped conveying groove along its width. Multiple idlers are arranged at intervals along the conveying direction within the conveying frame and are rotatably connected to the inner wall of the conveying frame. In this utility model, the V-shaped conveying groove on the working surface of the conveyor belt effectively constrains the waste, preventing it from dispersing during conveying, reducing the exposed area of ​​the waste, and lowering the possibility of dust generation. The idlers provide linear support to the conveyor belt, ensuring stable operation and preventing waste from scattering due to belt swaying, thus improving the stability and reliability of the conveying process.

The application relates to a cell structure integrated with a fin structure and a preparation method thereof and a SiC power device, and the structure comprises the following: a substrate; a super-junction epitaxial layer located on the top surface of the substrate and comprising two kinds of doped column gate structures with different conductive types, the doped column gate structures being located on the side of the super-junction epitaxial layer away from the substrate and extending along a first direction and being arranged at intervals along a second direction; a first fin structure located in the super-junction epitaxial layer between adjacent gate structures and comprising a first base region, a source region and a shielding region; the source region and the shielding region are alternately arranged along the first direction through the top surface of the first fin structure, and the first base region is arranged directly below the source region; a second fin structure located on the side of the gate structure away from the first fin structure; wherein the first fin structure is located directly above the doped column of the first conductive type; the bottom surface of the gate structure is not lower than the shielding region, and the top surface of the gate structure is lower than the top surfaces of the first fin structure and the second fin structure. The device channel mobility can be effectively improved, and the chip area can be reduced.

The utility model relates to laser welding machine structure technical field discloses a new energy automobile power battery processing is with laser welding machine, including control main part, the outside of control main part is provided with unfolding mechanism, the outside fixedly connected with workstation surface of unfolding mechanism, the outside of workstation surface is provided with fixed establishment, the fixed establishment includes a plurality of fixed plate no.

The utility model discloses an interactive hand clamping mechanism, which comprises an X-axis cross beam, an X-axis cross beam, an X-axis cross beam, a Y-axis cross beam, a Y-axis cross beam, a Y-axis cross beam and a Y-axis cross beam, the upper clamping hand module reciprocates along the X-axis cross beam in the upper clamping hand moving area; the upper clamping hand module comprises an upper clamping hand, an upper clamping hand X-axis translation seat and a Y-axis driving unit; the Y-axis driving unit drives the upper clamping hand to extend towards one side part of the X-axis cross beam to wait for materials and to retract to avoid one side part deviating from the X-axis cross beam; the lower clamping hand module reciprocates along the X-axis cross beam in the lower clamping hand moving area; the lower clamping hand module comprises a lower clamping hand, a lower clamping hand X-axis translation seat and a Z-axis driving unit for driving the lower clamping hand to move in the Z-axis direction relative to the lower clamping hand X-axis translation seat; and the Z-axis driving unit drives the lower clamping hand to ascend for material waiting and descend for avoiding. The structural compactness, the movement precision, the working stability and the structural reliability are improved.

The invention discloses a muon imaging detection system and method based on scintillation fiber and SiPM reading. Comprising at least one detection unit, the detection unit comprises a scintillation optical fiber array and SiPM array support plates, the scintillation optical fiber array is formed by arranging a plurality of scintillation optical fibers in parallel, the two ends of the scintillation optical fiber array are each provided with one SiPM array support plate, SiPM arrays are integrated on the SiPM array support plates, the number of the SiPM units is the same as that of the scintillation optical fibers, and the SiPM units and the scintillation optical fibers are in one-to-one correspondence; the SiPM unit is optically coupled with one end of a corresponding scintillation optical fiber signal, receives a scintillation optical signal transmitted in the corresponding scintillation optical fiber and generates an electric signal; the signal processing unit is used for preprocessing the electric signal output by the SiPM to obtain a processed signal; and the positioning reconstruction unit is used for reconstructing the space motion trail of the muon according to the processed signal. The system can realize three-dimensional high-precision positioning and track reconstruction of muons, and has the advantages of high integration level, modular design and the like.

The utility model discloses a kind of reinspection and weighing packaging machines, it is related to cement packaging machine technical field, including body and bottom plate, the side of the body is connected with protective cover, the top of the body is installed with feed hopper, the side of the body is equipped with discharge nozzle, the side of the body close to discharge nozzle is installed with support.The reinspection and weighing packaging machine can support cement bag through supporting plate under cement filling, weight sensor senses the weight of cement bag simultaneously, and baffle resists cement bag, prevent cement bag from toppling and sliding to the outside of the range of supporting plate when weighing, after inspecting and weighing cement bag, start electric push rod retraction again, so that electric push rod pulls baffle to rotate on rotating seat, then baffle rotates and opens, facilitate cement bag to come down from supporting plate, immediately inspect and weigh after cement filling, improve the work efficiency and practicality of packaging machine.

The invention relates to the technical field of water quality monitoring, in particular to an unmanned aerial vehicle water quality sampling device for environmental monitoring, which comprises an unmanned aerial vehicle body, a lifting assembly is arranged at the bottom end of the unmanned aerial vehicle body, the lifting assembly comprises a mounting plate mounted at the bottom end of the unmanned aerial vehicle body, a winder body is mounted at the bottom end of the mounting plate, and a sampling assembly is arranged at the bottom end of the lifting assembly. The sampling assembly comprises a sampling bin installed at the bottom end of the connecting rope, a plurality of water inlet holes are formed in the top end of the sampling bin in a penetrating mode, a bearing round frame is fixedly connected to the bottom end of the sampling bin, multiple sets of sliding round frames are slidably clamped to the inner end of the bearing round frame, and lower pressing blocks are fixedly connected between the sliding round frames located at the lower end. The top end of the pressing block slidably penetrates through a sliding rod at the top end of the sampling bin, the top end of the sliding rod is fixedly connected with a filter screen plate, and the bottom end of the filter screen plate is fixedly connected with a plurality of conical rods. By means of a linkage structure of the sliding round frame, the pressing block and the conical rods, integration of water entry resistance reduction, accurate sampling and sealing pollution prevention of the sampling bin is achieved.

This invention relates to a short-stroke gear selection mechanism and transmission device for a multi-speed transmission. The short-stroke gear selection mechanism includes a top cover and a shift assembly and a shifting assembly disposed within the top cover. The shift assembly includes a control shaft, a shift block, a first spring, and a shift rocker arm. The control shaft is disposed within the top cover, with one end rotatably connected to the top cover and the other end extending through the top cover and fixedly connected to the shift rocker arm. Within the top cover, the control shaft is rotatable along its own axial direction. A shifting area is provided in the middle of the control shaft, and the shift block is sleeved outside the shifting area. The shift block is movable and positioned along the axial direction of the control shaft and moves synchronously with the rotation of the control shaft. First springs are respectively provided at the front and rear ends of the shift block. This invention improves the shift assembly, enabling it to automatically position itself in neutral. By utilizing the spring's action on the shift block, the stability of the shift block position in neutral is ensured, thereby improving the working stability and safety of the gear selection mechanism.

The invention provides an operation control method of an underwater robot. The method comprises the following steps: acquiring an underwater image and underwater environment parameters in real time; determining an operation target through the obtained underwater image; driving the underwater robot to enter a preset operation range of the operation target; the operation posture of the underwater robot is adjusted in the operation range in combination with the underwater environment parameters; driving a first operation device and a second operation device to extend to the operation target, and controlling the second operation device to perform operation on the operation area; and adjusting the posture and / or position of the underwater robot, and controlling the first operation equipment to perform secondary operation on the operation area. According to the invention, the operation efficiency of the underwater robot can be improved, the stability and safety of the underwater robot during underwater operation can be enhanced, and the equipment loss can be effectively reduced.

The application discloses a kind of digital intelligence powder type free matching variable viscosity fracturing fluid skid-mounted equipment and control method thereof, belong to oil and gas field development technical field.The equipment includes stirring mechanism, feeding mechanism, water feeding mechanism and discharging mechanism, and is centrally controlled by control box.Feeding mechanism uses first screw conveyor to deliver solid material to stirring tank body;Water feeding mechanism supplies water to tank by water feeding pump and water outlet pipe with electromagnetic valve, and water quantity is monitored by water inlet flow sensor;Discharging mechanism outputs mixed liquid by discharging pump, and viscosity sensor detects fracturing fluid viscosity in real time.Control box connects each sensor and executing component, realizes automatic adjustment and closed-loop control of material proportioning by collecting flow and viscosity data.The application realizes accurate and automatic preparation of fracturing fluid, effectively solves the problem of inaccurate and poor stability of traditional manual proportioning, and significantly improves the quality of liquid preparation and operation efficiency.

The invention discloses a preparation method of an HfO2-based ferroelectric film with gradient oxygen vacancy distribution as well as the film and application of the HfO2-based ferroelectric film. The method comprises the steps that a lower electrode is prepared on a substrate, an amorphous HfO2-based prefabricated film is deposited on the lower electrode through atomic layer deposition, an upper electrode is prepared on the prefabricated film to form a sandwich stacking structure, and crystallization annealing is carried out to induce the prefabricated film to be crystallized into a ferroelectric orthorhombic phase; wherein the atomic layer deposition comprises at least one oxidant modulation period, a first deposition stage and a second deposition stage with different oxidation capacities are alternately carried out, and the oxygen content and oxygen vacancy defect distribution are regulated and controlled in the film thickness direction through the combination of sub-cycles, so that the oxygen vacancy concentration on one side close to the lower electrode and the upper electrode is lower than that in the middle area of the film. The obtained film can be applied to devices such as ferroelectric capacitors and ferroelectric field effect transistors, and is used for improving polarization output, reducing electric leakage and improving consistency and reliability of the devices.

The utility model relates to agricultural harvesting machinery technical field, concretely relates to the anti-injury excavating shovel structure of konjak harvester, including shovel body support, the bottom fixed mounting of shovel body support is horizontally arranged horizontal beam, the bottom fixed mounting of horizontal beam has a plurality of linear equidistance arrangement vertical beam along horizontal beam length direction, the bottom rod body of vertical beam is provided with angle adjustable excavating shovel, the end head position of excavating shovel is provided with arc blade mouth, the back central position of excavating shovel is integrally formed with reinforcing rib, and the first compression support rod and second compression support rod for resisting compression support are arranged between vertical beam and reinforcing rib. The utility model discloses firm structure can reduce the injury of konjak, reaches the effect of protecting the integrity of konjak.

The application discloses a fuel supply system of a marine ammonia fuel engine and a control method thereof, and can be applied to the technical field of fuel supply. The application sets a liquid ammonia storage tank, a first low-pressure pump, a first pressure sensor, a heater, a pressure stabilizing module, a second pressure sensor, a filter, a high-pressure pump, a heat exchanger and a second buffer tank in the supply system, sets a first buffer tank, a reversing valve, a gas-liquid separator, a pressure regulating valve and a liquefier in the pressure stabilizing module, and controls the pressure stabilizing working process through the difference between the output power of the ship engine and the first pressure value collected by the first pressure sensor and the second pressure value collected by the second pressure sensor, so that the working stability of the ammonia fuel supply system of the ship engine can be effectively improved, the ammonia fuel state input into the ammonia fuel engine meets the demand of the engine, and the working stability of the ship is improved.

This utility model discloses an engineering vehicle and its chassis, including a chassis body, a winch, and a winch support. The winch is installed on the rear side of the chassis body in the forward direction, allowing the winch performing traction work behind the chassis body and the working device performing construction work in front of the chassis body to operate independently or collaboratively without interference, thus improving equipment utilization and work efficiency. The winch support is installed on the chassis body located behind the winch, and the winch support has a rope guiding structure to limit the rope released from the winch. This utility model enables convenient collection of logs while meeting load-bearing requirements.

The utility model belongs to the technical field of petroleum workover equipment, concretely relates to a hydraulic tong station adjusting device and workover equipment, including the adjusting frame and the chassis, the longitudinal beam that sets up two hydraulic cylinders in the middle part of chassis is hinged, the piston rod end of two hydraulic cylinders all is hinged on the adjusting frame, the adjusting frame is driven its rotation around the axis of articulation shaft and drives hydraulic tong swing relative to the chassis by the piston rod telescopic drive of hydraulic cylinder, when the adjusting frame swings to the second end of chassis, and the limit support that this end of chassis is perpendicular fixed limits the contact. The utility model has realized the continuous, stable and automatic swing switching of hydraulic tong from the work position to the retreat position, reduced the strength of manual operation, improved the operation efficiency, reduced the operation error and the security risk caused by human factor, ensured that the hydraulic tong in non - working state, the equipment can absolutely stably keep in the retreat position, satisfied the extreme requirement of safety of wellhead unmanned operation.

This invention relates to the construction of water conservancy projects, and more particularly to retaining walls for water conservancy projects. The retaining walls are constructed from multiple precast raft slabs connected in series. The precast raft slabs provide a better foundation for the construction of the retaining walls and offer better resistance to settlement and displacement during later use. Compared to direct masonry, the precast raft slabs offer better waterproofing and can be prefabricated, saving construction time. A connecting device is provided between adjacent precast raft slabs to better adjust and maintain their position, improving operational stability. A waterproof structure is provided at the connecting device to prevent water erosion of the dam and to strengthen the connection between adjacent precast raft slabs.

The invention designs a heat dissipation device and a communication system. The heat dissipation device comprises a base body, fins and an ion wind module. The ionic wind module at least comprises a discharge structure and an alternating current power supply, the discharge structure at least comprises a first electrode, a second electrode and a dielectric layer, at least part of the first electrode is exposed in the external environment, and at least part of the second electrode is embedded into the dielectric layer to form an electrode module; one of the first electrode and the second electrode is electrically connected with the positive electrode of the alternating current power supply, the other electrode is electrically connected with the negative electrode of the alternating current power supply, ionic wind can be generated between the first electrode and the second electrode, the heating element is cooled through the ionic wind, and compared with natural convection cooling, the heat dissipation efficiency of the heat dissipation device on the heating element is improved; compared with fan cooling and ion wind cooling, noise generated during operation of the heat dissipation device is reduced, the working stability of the heat dissipation device is improved, the maintenance frequency of the heat dissipation device is reduced, the maintenance period is shortened, and the maintenance cost of the heat dissipation device is reduced.

The utility model discloses a kind of shelling devices for peanut breeding, it includes: support shell, the upper surface of support shell is fixedly connected with discharging box, the front surface of discharging box is fixedly connected with auxiliary motor one, the output end of auxiliary motor one is fixedly connected with rotating shaft, the side surface of rotating shaft is fixedly connected with limit roller, the lower surface of discharging box is fixedly connected with rubber pad, the left surface of support shell is fixedly connected with main motor, the output end of main motor is fixedly connected with rotating shaft, the side surface of rotating shaft is fixedly connected with scraper, the left and right inner walls of support shell are fixedly connected with grating, the left and right inner walls of support shell are fixedly connected with front support plate, the left and right inner walls of support shell are fixedly connected with rear support plate, the rear surface of rear support plate is fixedly connected with fan, by above device, it is beneficial to guarantee the precision and integrity of peanut shelling operation.

The utility model discloses a conveying device for medicine aluminum-plastic panel packaging quality inspection, which comprises a packaging conveyor arranged at the discharge end of an aluminum-plastic packaging machine, a quality inspection conveyor is arranged below the packaging conveyor, and the quality inspection conveyor and the packaging conveyor are arranged in a staggered manner along the vertical direction. A vertical frame is arranged on a machine frame of the quality inspection conveyor, a horizontal adjusting assembly is arranged on the side wall of the vertical frame, and an arc-shaped material guiding through groove is formed in the movable end of the horizontal adjusting assembly. An industrial camera is used for shooting medicine plates, a visual detection module is used for being matched with the industrial camera and an AI algorithm, image analysis is conducted on medicine particles of each plate, defects such as cavitation bubbles and half particles are recognized, and if quality defects exist, the current defective medicine plates are conveyed into a defective product collecting hopper through a pneumatic material removing assembly.

The application relates to an intensive transient disturbance regulation circuit, which comprises a three-phase bridge arm unit, a common DC side unit and a zero sequence bridge arm unit; the three-phase bridge arm unit is connected with each phase power supply branch of a three-phase power grid, a common neutral end of the common DC side unit and an input end of the zero sequence bridge arm unit, and an output end of the zero sequence bridge arm unit is grounded; the zero sequence bridge arm unit is used for generating a first current for offsetting a fault zero sequence component based on a power grid voltage, a power grid current and a common neutral end voltage of the three-phase power grid; the three-phase bridge arm unit is used for determining a three-phase reactive compensation current based on the common neutral end voltage and the first current input by the zero sequence bridge arm unit, and sending the three-phase reactive compensation current to a corresponding phase distribution line of the three-phase power grid; and the common DC side unit is used for providing common DC voltage support for the three-phase bridge arm unit and the zero sequence bridge arm unit. The zero sequence disturbance of the distribution network can be inhibited, and the voltage deviation and power fluctuation problems caused by the power grid transient disturbance can be weakened.