835 results about "Speed regulator" patented technology

The invention discloses an optimization control method and system for an ultra-large fan intelligent speed regulator, and relates to the technical field of fan intelligent control, and the method comprises the steps: obtaining the current operation environment parameters of a fan, including but not limited to a wind speed signal, a motor input current, a voltage, a power factor, a rotating speed, an environment temperature and atmospheric pressure; monitoring whether the wind speed fluctuation amplitude exceeds a set threshold or not in a continuous sampling period; judging whether the current system enters a critical hysteresis zone state or not, wherein the critical hysteresis zone state is a working condition when the wind speed data of the sensor does not have stability and fan output has current fluctuation abnormity and a differential pressure rapid change trend; when the system enters a critical hysteresis zone state, the collected wind speed signal is paused as a speed regulation basis, an air volume estimation model based on current, voltage, rotating speed, temperature, humidity and air pressure is constructed, and equivalent air volume is output as a pseudo feedback signal; the problem that the fan speed regulation accuracy and the system stability are reduced in the plateau low-pressure environment is solved.

The invention provides a self-adaptive algorithm and system for improving frequency measurement precision and response speed of a speed regulator. The method comprises the following steps: Step 1, signal acquisition and preprocessing; step 2, dynamically adjusting filtering parameters, and suppressing power grid signal noise; 3, extracting frequency characteristics in real time, and improving the frequency measurement resolution; 4, a synchronous clock is adopted as a reference frequency source, a clock reference value is periodically and automatically corrected, and long-term drift is eliminated; 5, a nonlinear dynamic model of the hydroelectric generating set is constructed, the nonlinear relation between the valve opening degree and output of the speed regulator is compensated in real time, and the frequency modulation precision is improved; and step 6, outputting the instantaneous frequency. According to the scheme, through the self-adaptive frequency measurement algorithm, high-precision clock calibration, a hardware acceleration mechanism and a nonlinear compensation strategy, a multi-dimensional optimization system is constructed, high-precision frequency measurement is carried out, a rapid effect can be achieved, and a hydroelectric system has long-term stability and high adaptability.

The utility model provides a powder assembly production line for eye shadow production, which comprises a support, a conveying mechanism arranged on the support, a plurality of eye shadow boxes arranged on the conveying mechanism in a linear array, and a plurality of powder assembly work stations arranged along one side of the conveying mechanism in a linear array. The powder assembling work station comprises a cabinet, a mechanical arm mechanism arranged in the cabinet, a conveying assembly arranged close to the mechanical arm mechanism and an upper computer arranged on the cabinet, and eye shadow powder blocks are arranged on the conveying assembly; the conveying mechanism is controlled through a speed regulator, the conveying assembly is controlled through a PLC, the mechanical arm mechanisms are all connected to the upper computers through doMot ion controllers, and the conveying mechanism and the upper computers are all connected to the main computer. According to the powder combining production line for eye shadow production, eye shadow powder blocks of different colors and types can be automatically placed in the eye shadow box, time and labor are saved, the production efficiency is greatly improved, and the production cost is reduced.

The invention provides a driving structure of a crawler belt of a stretcher crawler, and belongs to the technical field of the stretcher crawler, the driving structure of the crawler belt of the stretcher crawler is provided with a dual-driving system, and a crawler belt assembly surrounds two driving wheels and a supporting wheel to form a complete transmission path. Crawler tension changes can be detected in real time, and the rotating speed of the second driving motor can be automatically adjusted. When the front-section resistance of the track is increased, the tension detection device senses the change, and the mechanical speed regulator reduces the rotating speed of the second driving wheel through the centrifugal block and the transmission gear set to form a rotating speed difference to increase the front-section tension of the track so as to provide larger traction force. The whole system follows the constraint relation that delta n = n1-n2 = k * delta T + C, it is ensured that the rotating speed difference linearly corresponds to the tension change, and accurate dynamic adjustment of the crawler tension is achieved through coordinated operation of the double driving wheels.

Systems and apparatus are provided for a high-power microwave sensor using an unmanned aerial vehicle. The unmanned aerial vehicle may include a central body, at least one electric motor, and a barometric pressure feedthrough. The central body may include a first enclosure housing a plurality of low voltage components, a voltage feedthrough connector, and a second enclosure housing a plurality of high voltage components. The low voltage components may include a first signal processing system, a first radio transceiver, a flight controller, a second signal processing system, a second radio transceiver, and a navigation system. The high voltage components may include a plurality of electronic speed controllers, a power distribution module, an input power interface, and a plurality of high power filters. The components of each enclosure may be segregated such that the high voltage components do not create electromagnetic interference with the low voltage components.

Methods, systems, and apparatus for a speed regulator. A casing comprises a plurality of flat shutters, the casing configured to protrude in an extended configuration and to lay flat in a retracted configuration. A plurality of plates are configured to rotate between the extended configuration and the retracted configuration, and configured to configure the plurality of shutters in the extended configuration and the retracted configuration.

The application provides a permanent magnet eddy current governor for constant torque load heavy load starting and a control method thereof, and belongs to the technical field of permanent magnet eddy current transmission speed regulation. The permanent magnet eddy current governor comprises a conductor cylinder, a magnet disc, a transmission shaft and a magnet disc axial traction mechanism. The conductor cylinder is connected with a motor input shaft, the inner wall of the conductor cylinder is fixed with two groups of annular conductor sleeves, the annular conductor sleeves are divided into starting zones and rated working zones in the axial direction, and the two groups of starting zones are separated by an idle zone. The transmission shaft passes through the rear end of the conductor cylinder, the front end is located in the conductor cylinder, and the rear end is connected with a load output shaft. The magnet disc is installed on the shaft rod of the transmission shaft located in the conductor cylinder, and the outer ring surface of the magnet disc is uniformly distributed with permanent magnets. The magnet disc axial traction mechanism is used for driving two magnet discs to synchronously approach or move away from the center of the idle zone. The application can be used for motor idle starting, heavy load controllable starting, load balancing, speed regulation operation and unloading overload protection of constant torque load.

The invention discloses an unmanned aerial vehicle anti-wind disturbance controller and a control method, and belongs to the technical field of unmanned aerial vehicle flight control. The method runs on an independent processing module which is connected in series between a main flight controller and an electronic speed regulator of the unmanned aerial vehicle, a dynamic reference is constructed by collecting motor current in real time, deviation is calculated, and wind disturbance equivalent disturbance torque is estimated in a prospective mode through a third-order linear extended state observer (LESO) with bandwidth parameterization design; in combination with a'user operation state + flight mode 'two-dimensional intelligent decision compensation strategy, a'look-ahead wind resistance + attitude backup' dual-redundancy channel is matched, so that the wind disturbance is compensated in advance, and the flight stability in a complex scene is ensured. A corresponding controller adopts a standardized independent hardware design, the adaptability is high, the integration cost is low, and the method can be widely applied to high-precision operation scenes of various multi-rotor unmanned aerial vehicles.

The invention discloses an intelligent early warning method, system, equipment and medium for a speed regulator oil pressing device of a hydropower station, and belongs to the technical field of intelligent early warning of speed regulators of hydropower stations. Calculating the total oil amount of the oil pressing system according to the liquid level data and the cross sectional area of the corresponding oil storage equipment; recording the change data of the total oil amount in the monitoring period to form an oil amount historical curve; comparing the total oil amount change of the current time period with an oil amount historical curve; when the reduction of the total oil amount in the current time period relative to the reference value of the oil amount historical curve exceeds a judgment threshold value, judging that an oil leakage condition exists and generating early warning information; wherein the judgment threshold values are respectively set according to different operation conditions of the speed regulator oil pressing device. According to the invention, the oil leakage condition of the hydropower station governor oil pressing device is accurately judged, the abnormal operation condition is timely identified, leakage and leakage are intelligently detected, and meanwhile, the accuracy and timeliness of early warning are improved.

The present disclosure relates to a method for an elevator safety system, and to a computer-readable medium therefor. Provided is an abnormal sign-detecting elevator that can prevent safety-related accidents by means of various sensors, the elevator (20) comprising an elevator car (21), a governor (22), and a rope (23), wherein the elevator car (21) can move vertically along guide rails (25), the governor (22) comprises an upper sheave (22a) and a lower sheave (22b), and the rope (23) winds around the upper sheave (22a) and lower sheave (22b).

The invention discloses a pumped storage power station governor parameter optimization method and system, and relates to the technical field of pumped storage power station control, and the method comprises the steps: constructing a multi-dimensional evaluation system, and defining seven indexes of a unit safety class, a rotating speed response class and a power response class, which are used for comprehensively evaluating the power regulation performance; based on historical operation data of the power station, the occurrence probability of each initial working condition and load change is counted, a weighting factor matrix is generated, and weight contributions of high-frequency and extreme working conditions to an optimization target are quantified; and parameter optimization and decision making: simulating the performance of different speed regulator parameter combinations (KP = 0.1-1.9, KI = 0.1-0.7) under 30 typical working conditions by adopting a water-electro-mechanical coupling model, carrying out normalization and comprehensive scoring on simulation results based on a TOPSIS algorithm, and screening a parameter scheme with the highest total score. According to the method, the problems of single index and insufficient working condition adaptability in parameter selection of a traditional speed regulator can be solved, and collaborative improvement of unit safety and regulation stability is realized through multi-dimensional evaluation and probability-driven optimization.

The invention provides an integrated intelligent verification system and method for a diesel generator speed regulation system. The system comprises a mechanical speed regulation testboard, an electronic speed regulation testboard and an intelligent verification device. The intelligent verification device comprises an upper computer device and a lower computer device. The upper computer equipment is used for simulating and outputting the working mode of the diesel generator and providing test working parameters for the electronic speed regulator and the mechanical speed regulator based on the working mode of the diesel generator; the lower computer equipment is respectively connected with the upper computer equipment, the electronic speed regulator, the mechanical speed regulation control box and the detection equipment, and is used for correspondingly sending test working parameters to the electronic speed regulator and the mechanical speed regulator, and collecting working state parameters of the electronic speed regulator and working state parameters of the mechanical speed regulator to the upper computer equipment in real time; and the upper computer device displays and analyzes the working state parameters so as to verify the electronic speed regulator and the mechanical speed regulator. According to the invention, off-line test verification can be carried out on the diesel generator speed regulation system.

The invention discloses a motor locked-rotor detection method and device, and an electronic speed regulator, and relates to the technical field of motor fault identification, the disclosed motor locked-rotor detection method and device, and the electronic speed regulator determine a locked-rotor state by integrating multi-dimensional parameters of motor input power, rotating speed and efficiency, and combine a dynamic threshold adjustment and temperature compensation mechanism, so that the motor fault identification efficiency is improved. The problems that traditional single parameter detection is high in false alarm rate and poor in adaptability are effectively solved, the detection precision can be effectively improved, the thermal damage risk can be reduced, and the service life of equipment can be prolonged.

The invention discloses a motor speed regulation method and device, a rotating speed regulator, a storage medium and a program product, and relates to the technical field of motor control, and the method comprises the steps: obtaining an actual rotating speed, a rotational inertia parameter and a target rotating speed change rate of a vehicle motor under a working condition of a vehicle, and a current target rotating speed of a current rotating speed sampling period; determining control parameters for adjusting the rotating speed of the vehicle motor according to the rotational inertia parameters; determining a correction amount corresponding to the target rotating speed change rate, and correcting the current target rotating speed according to the correction amount to obtain the latest target rotating speed of the current rotating speed sampling period; and determining a target torque value of the vehicle motor based on the actual rotating speed, the latest target rotating speed and the control parameters. The technical problems that an existing motor speed regulation method is poor in speed regulation effect and cannot meet speed regulation indexes under different working conditions, and consequently the whole vehicle performance is low can be solved.

The present invention relates to the technical field of pumped-storage units, and particularly to a starting control method for a full-power variable-speed pumped-storage unit converter, including: when the unit starts, keeping the grid-side circuit breaker and the machine-side circuit breaker in the off state; controlling the excitation device to generate an initial excitation current; controlling the guide vane opening through the governor to control the speed increase of the motor, and judging the currently required operating state. If it is the power generation state, the machine-side converter enters the power control mode to complete the start; if it is the pumping state, closing the guide vane, the machine-side converter enters the braking and decelerating state. After the motor speed drops to 0, it drives the pump-turbine to increase speed in the reverse direction and enters the pumping working condition mode to complete the start. Through this control method, the additional DC capacitor charging circuit of the traditional full-power converter can be omitted, reducing the unit cost.

The invention discloses an integrated liquid cooling horizontal permanent magnet speed regulator which comprises a motor and a permanent magnet speed regulator body, the motor is connected with a load through the permanent magnet speed regulator body, the integrated liquid cooling horizontal permanent magnet speed regulator further comprises a cooling system, the cooling system comprises a water cooling heat dissipation module, and the water cooling heat dissipation module can be bent to adapt to the outline of the permanent magnet speed regulator body; the water-cooling heat dissipation module is provided with a main flow channel and a reinforced flow channel, the main flow channel is normally opened, the reinforced flow channel is normally closed, and the reinforced flow channel is automatically opened to assist heat dissipation when the rotating speed of the permanent magnet speed regulator body is high. The permanent magnet speed regulator has the advantages that the cooling system is formed by the water-cooling radiating module, and cooling liquid flows through the water-cooling radiating module to radiate the permanent magnet speed regulator body; the water-cooling heat dissipation module is of a three-section type structure, the angle of the water-cooling heat dissipation module is convenient to adjust, and the heat dissipation effect is improved; the water-cooling heat dissipation module is provided with the main flow channel and the reinforced flow channel, the main flow channel is used for heat dissipation at low rotating speed, the main flow channel and the reinforced flow channel are used for heat dissipation at high rotating speed, the heat dissipation effect is improved under the condition that the flow speed of cooling liquid is not increased, and the service life is prolonged.

The invention discloses an intelligent commanding and testing integrated system for hydropower station debugging, and relates to the technical field of hydropower station equipment debugging and operation testing. Based on the physical connection relation and debugging parameters of the water turbine and the speed regulator, a three-dimensional function sub-region model is constructed, a multi-test-mode working condition database is established, through the effect recognition module, the system can construct and judge key indexes in each test mode, and the test efficiency is improved. Whether the problems of resonance effect, guide vane hysteresis, water attack abnormity and disturbance deviation exist or not is automatically recognized, a corresponding early warning instruction is sent out, and a closed-loop link from'phenomenon recognition 'to'reason tracing' is achieved. According to the method, whether a single test is qualified or not can be judged, the collaborative imbalance risk coefficient in the ith test mode can be further calculated, the risk level between collaborative effects is evaluated according to the collaborative imbalance risk coefficient, and intelligent adjustment of a test strategy is supported.

This paper proposes a fixed-time formation control method for underactuated underwater vehicles based on an event-triggered mechanism. A virtual AUV is designed to track a leader AUV that only provides position information. An adaptive speed regulation law is also designed for the virtual AUV, enabling the follower AUV to track a reference position via the virtual AUV without requiring the leader's speed information. Furthermore, an event-triggered mechanism is introduced to intelligently trigger the follower AUV's control input. This method designs an adaptive speed regulator for the virtual AUV, transforming the formation control problem into a trajectory generation and tracking problem. An event-triggered mechanism is added to the controller to reduce the number of executions and minimize actuator wear and resource waste. Theoretical analysis demonstrates that all tracking errors in the closed-loop system converge to the neighborhood of the origin within a fixed time. This method has the advantages of low information transmission, low computational complexity, and low energy consumption, making it valuable for implementation in marine engineering.

The invention provides a hydropower station governor main distributing valve fault diagnosis early warning system and method, and relates to the technical field of hydropower station governor main distributing valve fault diagnosis. The hydropower station governor main distributing valve fault diagnosis and early warning system comprises a governor main distributing valve and a fault diagnosis and early warning system, a plurality of sensors are arranged on the governor main distributing valve and used for monitoring various operation parameters, pressure, temperature and displacement of the main distributing valve in real time, and the early warning system is connected with the sensors and used for monitoring the operation parameters, pressure, temperature and displacement of the governor main distributing valve. The fault diagnosis and early warning system can analyze collected data in real time and comprises a multi-mode sensor array, an edge computing unit and a digital twin platform. Through collaborative design of multi-modal fusion anti-interference, edge calculation real-time response and meta-learning small sample adaptation, core pain points of a traditional method in the aspects of data dependence, real-time performance and false alarm rate are solved, and a high-reliability and high-precision intelligent operation and maintenance solution is provided for a hydropower station speed regulation system.

The invention belongs to the technical field of motor control, and discloses a control method for switching an open loop to a closed loop of a permanent magnet synchronous motor, which is used for switching the permanent magnet synchronous motor from speed loop open-loop operation to rotating speed current double-closed-loop operation. Calculating an included angle delta between the shafting of the virtual synchronous rotating coordinate system dvirqvir and the shafting of the real rotor synchronous coordinate system dq; and then instantaneous switching of a command value of a current regulator, instantaneous switching of a current space voltage vector, switching of an angle variable used by coordinate transformation, initialization of a previous value of a low-pass filter, initialization of an integral term of the current regulator and initialization of an integral term of a speed regulator are executed in sequence, and open-loop switching and closed-loop switching of the permanent magnet synchronous motor are completed. According to the invention, the switching time is effectively shortened, and the switching stability and universality are improved.

The pipe network pump station desilting robot of the double-flow-channel suction pump structure comprises a robot shell body, a mounting support is fixedly mounted at the bottom of the robot shell body, a variable-frequency speed regulator is fixedly mounted on the outer side of the mounting support, crawler wheels are arranged on the inner side of the variable-frequency speed regulator, and the crawler wheels are fixedly mounted on the outer side of the mounting support. A double-flow-channel suction pump assembly is arranged on the outer side of the robot shell body, and a self-adaptive adjusting assembly is arranged on the outer side of the robot shell body. According to the pipe network pump station dredging robot of the double-flow-channel suction pump structure, by arranging the double-flow-channel suction pump assembly, a strong negative pressure suction environment can be formed, the sludge adhesion amount can be reduced, efficiency reduction caused by reduction of the cross section of the flow channel is avoided, the negative pressure strength of the main suction flow channel is supplemented, the air suction phenomenon is avoided, the self-adaptive adjusting assembly is arranged, and a pressure sensor monitors the main suction flow channel in real time; closed-loop control of blocking early warning, active intervention and risk elimination is achieved, a visual monitoring assembly is arranged, the equipment fault maintenance frequency is reduced, and the operation efficiency is improved.

The invention discloses a water turbine primary frequency modulation method adopting feedforward double fuzzy control and adapting to working condition changes, which comprises the following steps of: firstly, inputting a frequency deviation into a PID (Proportion Integration Differentiation) controller when the frequency deviation exceeds a primary frequency modulation dead zone, inputting a water head signal and a power signal into a fuzzy controller I, and outputting PID controller parameter Kp, Ki and Kd values after fuzzification, fuzzy reasoning and defuzzification; the PID output and the feed-forward signal are added and then converted into a hydraulic signal through an electro-hydraulic converter; and then the opening degree deviation signal and the derivative of the signal are input into a fuzzy controller II, an input electric signal of an electro-hydraulic converter is output, a movable guide vane is operated through a hydraulic execution mechanism to control the output of the water turbine, and a primary frequency modulation action is completed. According to the method, adaptability improvement is carried out on different working conditions of the water turbine governor based on fuzzy logic, meanwhile, in order to limit the water hammer effect, the second fuzzy controller is added in front of the electro-hydraulic converter, and the adaptability, quickness and stability of the primary frequency modulation process are effectively improved.

The invention discloses a power feedback and phase compensation-based oscillation suppression strategy for a multi-configuration-network converter grid-connected system. The multi-configuration-network converter grid-connected system mainly comprises the following modules: a power calculation module, a virtual speed regulator module, a virtual rotor module, a reactive power-voltage droop control module and a voltage and current double-closed-loop module. In the virtual rotor module, the output active power and the output power angle are subjected to a differential link to construct a power feedback loop, the difference value between the output angular frequency of the virtual rotor and the rated power grid frequency is used as the phase compensation amount, and a power feedback and phase compensation strategy is applied; the problem that after grid connection, a multi-grid converter is prone to being disturbed by the power grid frequency to generate violent power oscillation is solved.

The invention discloses a power battery pole coiled material composite coating system and method based on plasma activation, and relates to the technical field of power battery pole material manufacturing. The unwinding device consists of an unwinding roller, a tension sensor and a speed regulator, and conveys the pole coiled material at constant tension and speed; the cavity is a sealed vacuum cavity, is provided with an electrode plate, a gas ingress pipe and a vacuum extraction opening, and is internally provided with a detector for monitoring a plasma state; the coating chamber comprises a first coating chamber, a second coating chamber and a transition vacuum cavity; a thickness gauge, a spectrograph and the like are used for monitoring film layer parameters; graded cooling is adopted, and the gas humidity is controlled; the coiled material winding module is used for maintaining tension stability and correcting deviation; and communicating with each module, adjusting parameters and generating a log. According to the invention, the activation consistency of the pole coiled material and the adhesion force of the film layer are improved, the thickness uniformity and density of the coating film are optimized, multi-parameter monitoring is perfected to find defects in time, the stress of the film layer is reduced by graded cooling, the performance and production efficiency of the pole material are guaranteed, and the manufacturing requirements of power batteries are met.

The present application discloses a UAV cargo distribution equipment, a cargo distribution system, a cargo distribution method and a cargo distribution device. The UAV cargo distribution equipment includes a cargo warehouse placement platform and a rotating assembly; the cargo warehouse placement platform is used to place the cargo warehouse to be assembled; a plurality of pressure sensors are provided on the upper surface of the cargo warehouse placement platform; the cargo warehouse placement platform is connected to the rotating assembly and can be driven to rotate by the rotating assembly; the rotating assembly can rotate in response to a first drive instruction, and the first drive instruction is determined according to the distribution of pressure values. The beneficial effect of the present application is that, without the need for hardware modification of the UAV or its cargo warehouse, by adjusting the center of gravity position of the cargo warehouse to match the performance status of each arm of the UAV, the overall center of gravity distribution of the UAV is optimized, thereby reducing the loss and life difference of the electronic speed regulator, motor and propeller in different directions of the UAV, improving the safety of unmanned delivery, extending the overall life of the UAV, and significantly reducing the cost of cargo delivery.

The present invention discloses a magnetic levitation permanent magnet speed regulator based on a magnetic levitation linear motor and a speed regulation method thereof. The magnetic levitation linear motor comprises a cylindrical magnetic levitation linear motor, an axial single-degree-of-freedom hybrid magnetic bearing, and a dual cylindrical permanent magnet regulator. The control coil of the axial single-degree-of-freedom hybrid magnetic bearing is always energized, keeping the mover in a suspended state. The three-phase winding coils of the cylindrical magnetic levitation linear motor are energized according to changes in the external load to generate thrust that causes the mover to move axially, thereby driving the stator of the axial magnetic bearing to move axially. The axial air gap changes of the axial magnetic bearing are detected, and the axial magnetic bearing is controlled to generate a magnetic attraction that causes the magnetic bearing rotor to move axially, driving the sleeve on the transmission shaft to move linearly, changing the contact surface between the permanent magnet regulators, and adjusting the output torque and speed. The magnetic levitation permanent magnet speed regulator proposed by the present invention achieves more precise speed control, ensuring high-efficiency transmission. It also reduces vibration and noise, optimizes the permanent magnet regulator, and extends the service life of the equipment.

The invention relates to the technical field of backwash filtering tanks, and discloses a backwash filtering device and method for recharging geothermal tail water, and the backwash filtering device for recharging geothermal tail water comprises a shell, the sewage discharge pipe is arranged at the bottom of the shell, the inner cylinder is arranged in the center of the shell, the upper baffle ring and the lower baffle ring are respectively arranged on the upper end face and the lower end face of the inner cylinder and are connected with the shell, the filter cartridges are arranged on the outer side of the inner cylinder and are communicated with the upper baffle ring and the lower baffle ring, and the rotating shaft is rotationally arranged in the center of the shell and is rotationally connected with a sewage discharge arm; the pollution discharge arm is matched with any filter cartridge when rotating, and the pollution discharge arm is rotationally connected with a pollution discharge pipe; the turbine is arranged in the blowdown arm and is driven by the backflushing fluid; the centrifugal speed regulator is driven by the turbine, and the locking and releasing mechanism is triggered by the centrifugal speed regulator at a set rotating speed; and when the back-flushing flow is as low as a set value, the centrifugal speed regulator triggers the locking and releasing mechanism, so that the blow-off pipe rotates to the lower end of the next filter cartridge.

The invention relates to the technical field of water and electricity, and discloses an intelligent monitoring method for a speed regulator, which comprises the following steps: arranging a signal acquisition assembly and an execution element, and forming a continuous curve according to time based on signal data acquired by the signal acquisition assembly; wherein the signal data comprises oil pressure, flow, oil temperature, oil level, oil quality, noise, smell, opening degree, current and voltage; executing fault diagnosis early warning according to the continuous curve and / or video data acquired by the infrared camera; and based on a set starting condition, according to the signal data acquired in real time, when the set starting condition is reached, starting an emergency disposal scheme, and executing emergency disposal operation. Safety and reliability can be further improved, operation management and overhaul and maintenance work are intelligent as much as possible, and therefore long-term stable operation of the hydropower station is guaranteed.

The present invention discloses a method for diagnosing and analyzing the main and auxiliary pumping faults of a hydropower station speed regulator, and belongs to the field of hydropower station speed regulator control systems. The method of the present invention is based on the fault phenomenon of the valve core rapidly moving back and forth between the opening direction and the closing direction when the main and auxiliary pumping is twitching. By collecting the main and auxiliary pumping valve core displacement signal and the unit circuit breaker position signal, and utilizing the characteristics of the valve core alternating between the opening direction and the closing direction when the main and auxiliary pumping is twitching when the unit is in the grid-connected power generation state, an action threshold is set to judge the pumping fault and an alarm signal is issued in time. Through this method of the invention, the main and auxiliary pumping faults can be automatically and quickly diagnosed, and the redundant switching of the master and slave controllers can be selected to quickly restore the stability of the control system, prevent the expansion of the accident, and ensure the safe and stable operation of the unit.

The invention discloses a low-voltage energy-saving variable-frequency governor with a waterproof structure, which relates to the field of variable-frequency governor, and comprises an instrument main body and a rear cover arranged at the rear end of the instrument main body, a front cover is arranged at the front end of the instrument body, a control panel is arranged on the outer side of the front cover in a sleeving mode, a sealed threading plate is arranged in the instrument body, and threading holes are formed in the sealed threading plate. According to the low-voltage energy-saving variable-frequency governor with the waterproof structure, the lower end of the waterproof cover and the interior of the front cover are provided with the magnetic blocks which attract each other, so that the waterproof cover can be tightly attached to the front cover, the situation that the control panel is affected by water flow can be reduced, and two sets of conical sealing pieces can extrude and seal a wire; and in the process, the two sets of conical sealing pieces move towards the threading hole and extrude the threading hole, so that the conical sealing pieces and the threading hole are sealed, water flow is prevented from entering the instrument, and the waterproof effect of the variable-frequency speed regulator is guaranteed.