57 results about "Electromagnetic power" patented technology

The invention relates to the technical field of power transmission line self-energy-taking, and discloses a power transmission line self-energy-taking device and a state detection system, and the device comprises a housing structure, a motion structure, an electromagnetic power generation structure, and a friction power generation structure. Wherein the moving structure is composed of a permanent magnet, a spring and a fixing groove, the vertical shell and the fixing groove are connected through the spring, and a spring mass vibration system is constructed; the electromagnetic power generation structure generates power through relative movement of a permanent magnet and a coil. The friction power generation structure generates power through sliding separation of sliding electrodes on the side faces of the fixing grooves and electrodes in the side shells. The invention further discloses a state detection system, vibration energy is collected through the device and stored in an energy storage battery through an energy management circuit to supply power to a sensor detection circuit, and data are sent to an upper computer through a wireless transmission module. The power transmission line state real-time detection without external energy supply can be realized, and the problem of power supply of monitoring equipment in remote areas is solved.

The utility model discloses an electromagnetic power generation device based on road vibration energy, which belongs to the technical field of energy recovery and reutilization, and comprises an energy input module which comprises a partition plate and a ball screw, a nut of the ball screw is fixedly connected with the partition plate, an elastic element is propped against the lower part of the partition plate along the axial direction of the ball screw, and an upper cover plate is buckled at the top of the partition plate; an energy conversion module; comprising a lower cylinder, a rotor is arranged in the center of the lower cylinder, a plurality of magnets are fixedly connected to the outer side of the rotor in the circumferential direction, and a plurality of coils are fixedly connected in the lower cylinder around the rotor; the motion transmission module comprises a middle barrel, and one end, away from the partition plate, of the elastic element is fixedly connected with the top surface of the middle barrel; a conversion transmission assembly is arranged in the middle barrel, converts irregular rotation of the ball screw into unidirectional rotation and transmits the unidirectional rotation to the rotor. Irregular vibration is converted into stable one-way rotation, the energy conversion efficiency is improved, and the reliability and durability of the device are enhanced.

The utility model provides a self-powered intelligent water meter based on electromagnetic power generation. The self-powered intelligent water meter comprises a first built-in cavity, a second built-in cavity, a water inlet and a water outlet, the first built-in cavity and the second built-in cavity are connected through a bolt, the water inlet is communicated with the first built-in cavity, and the water outlet is communicated with the second built-in cavity. According to the utility model, the electric signal generated by the coil is utilized, the self-power supply technology and the self-sensing technology are combined, and multiple functions are realized through the simple structure; a switch control mode is adopted in the power supply management system, so that voltage and current are only used when needed, and no electric energy is consumed in other time; the power management circuit realizes a fully-automatic switching function through battery voltage detection, so that the whole system comprises the wireless transmission module and can be called as a real self-powered system; the energy of the energy source is fully and efficiently utilized, so that no energy loss exists in the energy conversion and distribution process.

This invention discloses a device for detecting and clearing ice and snow debris from power lines, comprising five parts: a crawling mechanism, an obstacle-crossing and clearing mechanism, an eddy current heating device, an autonomous power-collecting device, and a drone docking and flight device. The autonomous power-collecting device includes an electromagnetic power-collecting device and a pantograph contact power-collecting device. The crawling device and the eddy current heating device are located inside an openable structure, while the outside of the openable structure is connected to the electromagnetic power-collecting device and the obstacle-crossing and clearing mechanism. Drone docking and flight devices are located on both sides of the crawling device, with the pantograph contact power-collecting device placed on top of the drone docking and flight devices. A main control unit is located between the crawling device and the electromagnetic power-collecting device. This invention solves the problem that traditional mechanical clearing methods easily damage power lines and accelerate wear. Simultaneously, this invention also addresses the safety hazards faced by existing clearing equipment and personnel, as well as the problem of short single-operation time due to battery performance limitations.

The present application belongs to the technical field of grid-forming converter control, in order to solve the problem that the existing control strategy is difficult to balance the transient stability and grid support capability, a hybrid synchronization control method and system considering transient stability and grid support are proposed, when the grid-forming converter is detected to have transient instability risk, a grid-following control branch based on a first-order phase-locked loop is introduced in parallel on the basis of the original grid-forming virtual synchronous machine control loop; in the initial stage of the fault, by adjusting the gain proportional coefficient, the equivalent active power reference value is reduced to zero, so as to block the active power injection and minimize the acceleration area; after a preset initial time period, by dynamic adjustment, the equivalent active power reference value tracks the current electromagnetic power in real time, while continuing to suppress the power angle oscillation, the grid support capability of the converter is effectively restored.

The application provides a flexible direct current system frequency control method, device, equipment and readable storage medium, which is suitable for a water and electricity through a flexible direct current pure island sending system. When it is judged that the AC voltage of the flexible direct current sending end converter station of the system exceeds the preset first threshold value, the application can judge whether the AC fault of the flexible direct current transmission system is removed. If the AC fault is removed, the frequency reference value of the sending end converter station control system is increased from an initial value to a preset second threshold value. After the frequency reference value of the sending end converter station control system is maintained for a preset first time, the frequency reference value of the sending end converter station control system of the flexible direct current transmission system is reduced from the preset second threshold value to the initial value according to the preset frequency reference value adjustment condition. The method can reduce the overshoot of the generator electromagnetic power during the recovery of the sending end AC system fault of the flexible direct current transmission system, reduce the impact on the sending end converter station of the flexible direct current transmission system, and is beneficial to maintaining the transient stability of the system.

The invention belongs to the field of mechano-electronics and industrial automation control, and particularly relates to an industrial-grade electromagnetic boosting arm device with a fault self-diagnosis and passive safety mode, which comprises a loading seat integrated with a circuit board. The device comprises an electromagnetic driving execution module, a multi-mode sensing acquisition module, a self-adaptive signal conditioning module, a real-time fault diagnosis module, a passive safety decision module and a dynamic trajectory planning module. Through the dynamic filtering and phase locking technology of the adaptive signal conditioning module, the interference of the noise of the power switch on the signal of the rotary transformer is effectively suppressed, and the accuracy of fault diagnosis and the positioning precision of the device are remarkably improved. A multi-dimensional parallel diagnosis mechanism of the real-time fault diagnosis module can identify potential faults of a motor, a transmission chain and a sensor in an early stage, and device performance deterioration caused by fault accumulation is avoided.

The utility model provides a kind of electromagnetic power chuck structure, comprising: electromagnetic power part, permanent magnet, main shaft, power chuck, transition disc, shield and pull rod;Electromagnetic power part is fixed on the inner wall of shield, the direction and size of electromagnetic force are changed by changing the current direction and current size of electromagnetic winding;Main shaft is connected with power chuck by transition disc;Electromagnetic power part controls permanent magnet to drive pull rod to move together by changing magnetic pole direction, pull rod pushes and pulls power chuck, and the chucking or loosening of the chucking jaw of power chuck is realized;The clamping force of power chuck is controlled by changing the magnetic force size of magnet to change the size of direct current.

The invention relates to the technical field of high-voltage electric energy collection, and discloses a power generation device and a power generation system applied to a high-voltage transmission line. The power generation device comprises a frame, a magnet, an electromagnetic power generation module and a friction power generation module. When the high-voltage power transmission line is electrified, the magnet can move under the action of magnetic torque generated by the high-voltage power transmission line. The electromagnetic power generation module comprises a magnetic induction coil, and when the magnet gets close to or away from the magnetic induction coil, the magnetic induction coil generates current under the action of the magnetic field of the magnet. The friction power generation module is arranged in the third containing cavity and comprises a magnetic sheet and a sub-module, and when the magnet gets close to the magnetic sheet, the magnetic sheet moves under the action of the magnetic field of the magnet, so that the first friction part and the second friction part rub against each other, and current is generated between the first electrode and the second electrode. Movement generated by the magnet in the power generation device under the action of the magnetic field of the high-voltage power transmission line can be converted into current of the electromagnetic power generation module and the friction power generation module at the same time, and the energy output efficiency is effectively improved.

The application discloses a variable-speed unit primary frequency modulation method based on power setting value correction, which comprises the following steps: obtaining real-time operation parameters of a target variable-speed unit; a converter of the target variable-speed unit calculates an electromagnetic power variation corresponding to a primary frequency modulation action; a control amount of a mechanical hydraulic system of the target variable-speed unit is calculated and input into the mechanical hydraulic system to obtain a mechanical hydraulic control amount; and the primary frequency modulation of the variable-speed unit is completed according to the electromagnetic power variation and the mechanical hydraulic control amount. The application further provides a system for implementing the variable-speed unit primary frequency modulation method based on power setting value correction. The variable-speed unit primary frequency modulation method and system based on power setting value correction provided by the application not only realize the primary frequency modulation of the variable-speed unit, but also have the advantages of fast frequency modulation speed, high reliability, good practicability and good frequency modulation effect by virtue of the innovative control strategy design.

The application discloses a kind of vibration electromagnetic coupling-based marine power machinery vibration reduction and energy collection device, it is related to vibration control and energy recovery technical field, including shell, guide rod, mass block slidable along guide rod, composite transducing module;Composite transducing module includes electromagnetic power generation unit, piezoelectric power generation unit and energy management circuit;Electromagnetic power generation unit includes magnet group, inductive conductor;Piezoelectric power generation unit includes at least one piezoelectric element, piezoelectric element one end is connected with mass block, other end is connected with shell or structure fixed to shell, so that the relative displacement between mass block and shell can force piezoelectric element to produce deformation.Mass block cuts static magnetic field magnetic induction line and generates electromagnetic electric energy;While extruding piezoelectric element generates piezoelectric electric energy, and both are exported after circuit management.The present application efficiently converts harmful vibration energy into electric energy, while achieving vibration reduction, power supply for low-power consumption equipment, compact structure, high reliability, high energy recovery efficiency.

The energy storage container comprises a container body, a wind power shutter structure, a magnetic pole structure and energy storage equipment, the wind power shutter structure is arranged on the side wall of the container body and comprises blades, connecting rods, arc-shaped springs and copper wire winding structures, the connecting rods are inserted into the side wall of the container body, and the magnetic pole structure is arranged on the side wall of the container body. The ends, away from the container body, of the connecting rods are connected with the blades, the ends, located in the container body, of the connecting rods are connected with the arc-shaped springs and connected with the copper wire winding structures through the arc-shaped springs, the magnetic pole structures are installed in the container body, and the copper wire winding structures are used for cutting magnetic induction lines of the magnetic pole structures. And the copper wire winding structure is connected with energy storage equipment. Magnetic induction lines of the magnetic pole structures can be stably cut through the wind power shutter structures, and efficient electromagnetic power generation is achieved; meanwhile, the arc-shaped spring can play damping and resetting roles, so that the equipment stability is improved, and the problem that the container cannot effectively utilize wind energy is solved.

The invention discloses a marine power machinery vibration reduction and energy collection device based on vibration electromagnetic coupling, and relates to the technical field of vibration control and energy recovery, the marine power machinery vibration reduction and energy collection device comprises a shell, a guide rod, a mass block capable of sliding along the guide rod, and a composite transduction module; the composite transduction module comprises an electromagnetic power generation unit, a piezoelectric power generation unit and an energy management circuit; the electromagnetic power generation unit comprises a magnet group and an induction conductor; the piezoelectric power generation unit comprises at least one piezoelectric element, one end of the piezoelectric element is connected with the mass block, and the other end of the piezoelectric element is connected with the shell or a structure fixed to the shell, so that relative displacement between the mass block and the shell can force the piezoelectric element to deform. The mass block cuts magnetic induction lines of a static magnetic field to generate electromagnetic electric energy; and the piezoelectric element and the piezoelectric electric energy are output after being managed by a circuit. Harmful vibration energy is efficiently converted into electric energy, power is supplied to low-power-consumption equipment while vibration reduction is achieved, the structure is compact, reliability is high, and the energy recovery efficiency is high.

The application discloses a kind of variable-speed hydroelectric generating set primary frequency modulation methods based on unit rotating speed fixation, including obtaining unit real-time operating parameter and unit parameter;Converter calculates electromagnetic power variation according to target electromagnetic power;Calculate the first opening control quantity and the second opening control quantity of unit;Calculate the mechanical hydraulic system control quantity in unit;Mechanical hydraulic system control quantity is input to mechanical hydraulic control system to obtain mechanical power variation;According to electromagnetic power variation and mechanical power variation, complete target variable-speed hydroelectric generating set primary frequency modulation.The application further discloses a kind of system for implementing the variable-speed hydroelectric generating set primary frequency modulation method based on unit rotating speed fixation of the application.The application adjusts unit operating speed according to target power value, not only realizes the variable-speed hydroelectric generating set primary frequency modulation based on unit rotating speed fixation, but also has high reliability, good stability and better effect.

The invention discloses a power converter for frequency support, and a control method and equipment of the power converter. The power converter comprises a power conversion circuit and a controller. The first end of the power conversion circuit is connected with a power grid, and the second end is connected with a power supply; the controller serves as a core control unit, calculates and determines an adaptive damping compensation coefficient according to the virtual inertia and the active frequency modulation coefficient of the power converter, and then achieves decoupling of a damping control link and an active frequency modulation link by adding a first-order lead-lag link in an electromagnetic power feedback channel of an active ring of the power converter. Meanwhile, in the first-order lead-lag link, the determined damping compensation coefficient is utilized to superpose transient compensation electromagnetic power for output of an electromagnetic power feedback channel, and complete network construction control logic is formed.

The utility model discloses a lifting device. The lifting device comprises a fixing piece, a truss, a first shaft, a second shaft, an actuating mechanism, an electromagnetic power-off brake, a lifting mechanism and a controller. One end of the first shaft is connected to the end part of the truss, and the first shaft is rotatably connected to the fixing piece; one end of the second shaft is connected to the end part of the truss, and the second shaft is rotatably connected to the fixing piece; the actuating mechanism is mounted on the fixing piece and is in transmission connection with the second shaft; the electromagnetic power-off brake is installed on the fixing piece, connected with the first shaft or the second shaft and configured to tightly hold the first shaft or the second shaft during power failure. The hoisting mechanism is connected to the truss; the actuating mechanism and the electromagnetic power-off brake are connected to a power supply through a controller; the controller is configured to control power-on and power-off of the actuating mechanism and the electromagnetic power-off brake and the rotation direction of the output end of the actuating mechanism. The lifting device can be mounted on a wall of a plant or a structural steel column, does not occupy ground space, and has higher carrying efficiency.

The utility model provides a magnetic force enhanced vibration energy collection device, which comprises a piezoelectric power generation module and an electromagnetic power generation module, wherein the piezoelectric power generation module comprises a piezoelectric high-frequency beam, a metal low-frequency beam, a stop block and a first permanent magnet; the electromagnetic power generation module comprises a second permanent magnet, a coil, a magnetic conductive material and a coil shaft, the coil shaft is arranged in the coil, the magnetic conductive material is located in a center hole of the coil shaft, and the coil is arranged around the magnetic conductive material. In order to solve the problems of narrow working frequency band and low energy output of a vibration energy collector, two modes of collision frequency raising and frequency expanding and magnetic force frequency raising and frequency expanding are combined in one piezoelectric energy collection module, and an electromagnetic power generation module is introduced at the same time. Therefore, the energy conversion efficiency and the overall generating capacity are improved, energy collection in the overall wide frequency range is achieved, low-frequency vibration energy with the wide change range in the environment can be effectively collected and converted into electric energy, and power is supplied to wireless sensing nodes.

The invention relates to an eagle beak imitating type friction-electromagnetic combined type underwater energy capturing device and a subsurface buoy monitoring system in the technical field of nanometer new energy. The underwater energy capture device comprises a shell, a swing rod, a friction power generation unit, an electromagnetic power generation unit and an energy storage device. A hinge part and a swing limiting area with the hinge part as the circle center are arranged in the shell. One end of the swing rod is hinged to the hinge part, and the other end is slidably connected with the shell in the swing limiting area. The friction power generation unit is used for conducting friction power generation when the swing rod swings in the swing limiting area. The electromagnetic power generation unit is used for conducting electromagnetic power generation when the swing rod swings in the swing limiting area. The swing rod and the spring energy storage structure are combined, the swing rod sensitively receives the gravity center change generated by low-frequency wave excitation and converts the gravity center change into swing motion, meanwhile, the spring energy storage structure is used for storing initial energy, the problem that the device is difficult to start under low-frequency low-amplitude underwater wave excitation is effectively solved, and the underwater wave energy collection efficiency is remarkably improved.

The application discloses a wave energy collection device based on a magnetic spring-leaf spring type bistable mechanism, comprising a bistable energy trapping device (1), a motion conversion device (2), an electromagnetic power generation device (3) and a power management module, wherein the bistable energy trapping device is provided with a magnetic spring-leaf spring type bistable mechanism, and through nonlinear interaction between magnets, efficient capture of mechanical energy under low-frequency waves is realized; the motion conversion device (2) is designed through a gear transmission system and a one-way bearing, so that one-way rotation of an output shaft is ensured; the electromagnetic power generation device (3) utilizes the relative rotation principle of a magnet flywheel and a coil, the magnetic flux of the coil changes, so that a voltage is generated, mechanical energy captured by the bistable energy trapping device (1) is converted into electric energy, and simultaneously, the power management module is responsible for rectification, storage and distribution of the electric energy, so that stable power supply can be obtained under any condition. The system has wide application prospects and important economic value in the fields of marine ecosystem monitoring, climate change research and marine pollution monitoring.

The present invention relates to a power transformer assembly (10) for converting electromagnetic power from an oscillating electromagnetic field into electrical current or usable current power for charging an electrical storage device or energizing an electrical load. The power transformer assembly (10) comprises: a magnetic assembly (MA) for receiving the oscillating electromagnetic field and converting it into alternating current (AC); an electronic assembly (PE) for receiving the alternating current (AC) and converting it into electrical current; and heat dissipation means (X1, X2) for dissipating heat generated by the electronic assembly (PE) during each power conversion operation. The heat dissipation means (X1, X2) comprises a first heat transfer part (X1) associated with said electronic assembly (PE).

The utility model relates to a magnetic circuit part of a relay and the relay, the magnetic circuit part of the relay comprises a yoke assembly, a metal shell and a movable iron core, the yoke assembly is provided with a through hole for a push rod to pass through, the metal shell is arranged in a space enclosed by the yoke assembly, the metal shell is arranged around the axial direction of the push rod, and the movable iron core is arranged in the through hole. The metal shell comprises a magnetic conductive part and a non-magnetic conductive part, and the magnetic conductive part is connected with the yoke assembly through the non-magnetic conductive part; the movable iron core is used for driving the push rod to move axially relative to the yoke assembly; at least part of the structure of the movable iron core is located in the metal shell, and the magnetic conduction part can conduct magnetic lines between the yoke assembly and the movable iron core. According to the magnetic circuit part of the relay and the relay, the electromagnetic power of the movable iron core is improved while the miniaturization of the relay is considered.

The invention relates to an electromagnetic-friction hybrid energy collector based on Halbach array magnetic suspension, and belongs to the technical field of micro mechanical energy collection and micro energy system energy supply. The device comprises a shell, and a bearing base, a guide mechanism, a sleeve, an electromagnetic power generation unit and a friction power generation unit which are arranged in the shell. The two ends of the guide mechanism are respectively connected with a bearing base; the guide mechanism is sleeved with the sleeve, and the sleeve is located between the two bearing bases. The electromagnetic power generation unit and the friction power generation unit are fixedly connected with the sleeve; the energy collector further comprises two fixed magnetic rings, the two bearing bases are each fixedly provided with one fixed magnetic ring, and through the magnetic repulsion effect between the fixed magnetic rings and the electromagnetic power generation unit, the sleeve where the electromagnetic power generation unit and the friction power generation unit are fixed does reciprocating motion between the two bearing bases along the guide mechanism. Electromagnetic and friction power generation can be synchronously realized, and the collection efficiency of low-frequency vibration energy is improved.

The utility model relates to the technical field of municipal engineering, and discloses an inspection well cover structure with an electromagnetic power generation function, which comprises a well seat, an electromagnetic power generation box is mounted at the bottom of an upper cover plate, and when pedestrians and vehicles apply pressure to the well cover, the upper cover plate drives transmission parts such as a driving seat and a transmission rod; the first electromagnetic coil at the bottom of the movable electromagnetic plate is driven to be close to the second electromagnetic coil at the top of the electromagnetic generator, pressure mechanical energy is converted into electric energy through the electromagnetic induction principle, power is supplied to urban facilities, and energy recycling is achieved. According to the utility model, the movable electromagnetic plate and the first electromagnetic coil are driven to move by using the pressure generated by stepping or rolling the upper cover plate by pedestrians and vehicles, and the magnetic field generated by the second electromagnetic coil is cut, so that electromagnetic induction power generation is realized. According to the mode of converting daily mechanical energy into electric energy, green and sustainable distributed electric energy supplement is provided for cities, power can be supplied to street lamps, nearby monitoring equipment and the like, and urban energy consumption is effectively reduced.

This invention belongs to the field of power generation equipment technology, specifically relating to a helical wave energy generation device. Installed in water, it converts the potential energy of the helical motion generated on the water surface into electrical energy. The helical wave energy generation device includes: a fixed frame, a limiting seat, a float, and at least one power generation component. The limiting seat is located at the front end of the crossbar in the fixed frame; it has a guide hole and a rack at its bottom. The top cover of the float has a rack hole and a guide rod. The power generation component is installed inside the float; it includes a rotating shaft, two rotors, two stators, and two sets of triboelectric and electromagnetic power generation components. The rotating shaft has gears that mesh with the rack, the rotors and stators are located at both ends of the rotating shaft, and the triboelectric and electromagnetic power generation components are located between the rotors and stators. A waterproof component is also provided between the limiting seat and the float. This invention solves the problems of low power generation efficiency, high cost, and short service life of existing wave energy generation devices.

The embodiment of the present application relates to a kind of converter phase-locked control method and device, the method includes the following steps: S1, simulating synchronous generator no-load operating condition, given the mechanical torque T m Initial value;S2, given excitation electromotive force amplitude E initial value;S3, according to converter grid-connected point instantaneous voltage sampling input value U g ∠θ g And excitation electromotive force amplitude E, by stator electrical equation, electromagnetic power P e Is obtained;S4, according to electromagnetic power P e And mechanical torque T m , by rotor motion equation, rotor speed angle frequency ω is obtained;S5, according to rotor speed angle frequency ω, the rotor phase θ is calculated, and the rotor phase θ is used for stator electrical equation.The technical scheme of the embodiment of the present application is based on the principle of synchronous generator self-synchronization, replaces conventional phase-locked loop with rotor motion equation, replaces converter machine end voltage phase detection with virtual rotor phase, has self-synchronization characteristics, to solve the synchronization stability problem of grid-connected converter based on phase-locked control under weak power grid.

The invention relates to the technical field of electromagnetic power generation, and discloses an electromagnetic vibration power generation device which comprises an electromagnetic coil structure, an electromagnet and a fixing frame, a through hole is formed in the middle of the electromagnetic coil structure, the right end of the electromagnetic coil structure is fixedly connected with an extension frame, and the right end of the electromagnetic coil structure penetrates through the extension frame to be connected with a power connector. A transverse plate is fixedly arranged at the inner end of the fixing frame, and the fixing frame and the transverse plate are of a reverse F-shaped structure and are fixedly arranged at the right end of the extending frame. A fixing seat is fixedly arranged at the left end of the bottom of the fixing frame, a spring frame is fixedly connected to the bottom of the fixing seat, the electromagnet is located in the middle of the interior of the through hole, a connecting rod is fixedly arranged at the top of the electromagnet, and a fixing disc is fixedly arranged at the upper end of the connecting rod and fixedly arranged at the lower end of the spring frame. According to the invention, more electric energy can be output under the same vibration condition; reciprocating vibration enables the electromagnet to continuously cut magnetic induction lines in the electromagnetic coil structure, so that continuous current is generated, and the vibration amplitude and frequency of the electromagnet can be better controlled.

The invention belongs to the related technical field of network-constructed converter control, and provides a hybrid synchronous control method and system giving consideration to transient stability and network-constructed support in order to solve the problem that an existing control strategy is difficult to give consideration to transient synchronous stability and network-constructed support capacity. On the basis of an original network construction type virtual synchronous machine control loop, a network following type control branch based on a first-order phase-locked loop is introduced in parallel; in the initial stage of a fault, an equivalent active power reference value is reduced to zero by setting a gain proportionality coefficient, so that active power injection is blocked, and the acceleration area is minimized; after a preset initial time period, the equivalent active power reference value tracks the current electromagnetic power in real time through dynamic adjustment, and the power grid supporting capacity of the converter is effectively recovered while power angle oscillation continues to be stabilized.

The utility model relates to a simple pendulum type piezoelectric-electromagnetic composite wave energy power generation device, and belongs to the technical field of wave energy power generation. The device comprises an upper hemispherical shell, a lower hemispherical shell, an elastic limiting mechanism, a simple pendulum mechanism and a balancing weight, wherein the elastic limiting mechanism and the simple pendulum mechanism are mounted in the upper shell; the elastic limiting mechanism is used for limiting the swing amplitude of the simple pendulum mechanism, and the upper and lower hemispherical shells are connected to form a sealed sphere; the simple pendulum mechanism is composed of a swing support and a piezoelectric-electromagnetic power generation set module, the top of the swing support is hinged to the top in the upper shell, the piezoelectric-electromagnetic power generation set module is horizontally fixed to the tail end of the swing support in a balanced state, the whole piezoelectric-electromagnetic power generation set module is columnar, and piezoelectric power generation modules containing fixed magnets are arranged at the two ends of the piezoelectric-electromagnetic power generation set module. An electromagnetic power generation module including a coil and a moving magnet is arranged in the middle. According to the device, the repulsive force between the magnets is used for applying pressure to the piezoelectric power generation module, piezoelectric and electromagnetic energy collection mechanisms are combined, and the energy conversion efficiency is improved.

The invention discloses a double-fed fan low-voltage-ride-through active fast recovery control method and device and a medium. The problems that after a fault is removed, electromagnetic power is recovered at a fixed rate, and the dual requirements of load safety and active rapid recovery cannot be considered are solved. Four types of core data of grid-connected point three-phase voltage, unit power, shafting load and tower load are synchronously collected, whether a fuzzy control output mode is entered is judged based on a comparison result of the grid-connected point three-phase voltage and the unit power with a preset threshold value, normal operation is kept under a non-fault working condition, fuzzy regulation is started under a fault working condition, and the fault condition is monitored. And dynamic adjustment of the recovery rate is realized through the nonlinear adaptive characteristic of fuzzy control. And superposing a rate correction value obtained by fuzzy control with a preset default recovery rate to obtain a final low-voltage crossing active recovery rate. Dynamic correction is carried out based on shafting and tower load data, and it is ensured that the fan always operates under the double constraints of load safety and active rapid recovery.

A method for equivalent stability evaluation of new energy station, the method first equivalently regards the new energy station as an injected current source, establishes a multi-node network model containing synchronous generator, new energy station and infinite system; then, based on the node voltage equation, the system is simplified into an equivalent single-machine infinite system model through the elimination method, and the modified electromagnetic power expression of the synchronous generator after the new energy station is connected is derived; subsequently, the dynamic process of the active power of the new energy station recovering at a rate k after fault removal is analyzed, and its influence on the acceleration and deceleration areas in the swing of the power angle of the synchronous machine is analyzed; on this basis, a first swing and third swing transient power angle stability criterion is constructed with the recovery rate k as the variable; finally, the criterion is solved to obtain the safe allowable interval of the active power recovery rate k to ensure the transient stability of the system. The method provides an analysis tool for quantitatively evaluating the influence of new energy dynamics on the multi-swing stability of the system.