134 results about "Preventive control" patented technology

The invention relates to a high-reliability burglary-preventive control mechanism for an automobile door lock, which comprises a lock shell and further comprises a motor, a worm, a worm gear, a spring, a swing rod, a manual security locking/unlocking pull rod, an unlocking pull rod, a pull rod return spring, a transitional pull rod, a pawl, a pawl return spring and a bolt, which are mounted in the lock shell. The worm is mounted on a motor shaft, a worm gear shaft is perpendicular to the motor shaft, a swing rod shaft is parallel to the worm gear shaft, the worm gear is provided with a groove in a special geometrical shape and capable of pushing a cylindrical boss at the top of the swing rod to push the swing rod to swing, positioning of the swing rod is realized through a slide on the lock shell, and an eccentric spring is mounted on the swing rod. The manual security locking/unlocking pull rod is mounted on the swing rod shaft, a clamping groove of the manual security locking/unlocking pull rod clamps a cylindrical boss at the tail end of the swing rod, the unlocking pull rod is connected with the pawl through the transitional pull rod, and the swing rod can swing to drive the transitional draw rod to rotate around a hinge on the pawl to be separated from the unlocking pull rod, so that the unlocking pull rod cannot unlock, and security is realized. The cam shaped groove on the worm gear is symmetrical, the worm gear only needs to rotate by 180 degrees to complete security locking/unlocking actions, and the high-reliability burglary-preventive control mechanism is high in transmission efficiency.

The invention relates to a prevention, control and fault handling method and system for a power distribution network. The prevention, control and fault handling system for the power distribution network comprises a uniform-control platform, an information acquisition unit and a prevention and control unit, wherein one end of the uniform-control platform is connected with the information acquisition unit, the other end of the uniform-control platform is connected with the prevention and control unit, the prevention and control unit is used for predicting the abnormal operating state of devices in the power distribution network in a short period of time in future, and the prevention and control unit comprises a second index calculation module used for setting an index in advance according to the information of the devices in the power distribution network and the information of a network topology and storing the information of the topology so that data support can be provided for a fault handling unit. The prevention, control and fault handling method and system for the power distribution network have the advantages that the practicability is high, threshold crossing can not occur easily in a short period of time, time of prevention and control handing is effectively saved, energy is saved, and the probability of occurrence of faults is lowered.

In a vehicle dynamics control apparatus enabling vehicle dynamics control and lane deviation prevention control, a processor of a control unit is programmed for determining a driving stability including a vehicle driveability and a vehicle stability, based on at least a steer angle, and for executing the vehicle dynamics control by producing a yaw moment corresponding to a controlled variable of the vehicle dynamics control when the driving stability is deteriorated, and for executing the lane deviation prevention control by producing a yaw moment corresponding to a controlled variable of the lane deviation prevention control when there is a possibility of lane deviation. The processor is further programmed for softening a criterion, which is used to determine the driving stability, based on the controlled variable of the lane deviation prevention control, only when the vehicle dynamics control is inoperative.

The invention discloses a hybrid control method of an electrical-gas interconnection integrated energy system. The hybrid control method comprises the following steps of 1) building an electrical-gasinterconnection integrated energy system optimization model according to slow dynamic characteristic of natural gas and pipe storage; 2) building prevention and control optimization dispatching modelof the electrical-gas interconnection integrated energy system by considering a key fault in an anticipated fault set; 3) building an after-fault correction control module by considering other faultsexcept for the key fault set in the anticipated fault set according to a prevention and control strategy; 4) building a hybrid control framework of the electrical-gas interconnection integrated energysystem by combining a prevention and control model and the correction control module; and 5) testing performance of the hybrid control method in the integrated energy system. With the method providedby the invention, the calculation efficiency is effectively improved, and the fault control strategy of the electrical-gas interconnection integrated energy system can be more accurately customized.

The invention discloses an electric power system protection and control method based on a risk assessment. The method comprises the following steps: carrying out the risk assessment on an electric power system, and calculating power network risk values; establishing a protection and control object function; inputting electric power system running states and parameters; and according to the protection and control object function and the power network risk values, formulating electric power system protection and control measures. According to the invention, risk theories are applied to the protection and control of the electric power system, the problem of formulating protection and control measured by reliance on experience of dispatchers is solved, and quantifiable measures can be obtained by use of the method so as to effectively realize safety protection and control of the electric power system. Besides, the method, on the basis of the risk assessment, takes control cost into consideration in an integrated approach, draws up the protection and control object function and formulates the quantifiable protection and control measures according to the object function so as to reduce the control cost as much as possible under the condition that safety protection of the electric power network is realized.

The invention provides a power system transient stability multi-fault constraint preventing control method. According to the method, a buckling failure is decoupled through expected fault position topology analysis; a multi-fault adjusting timing sequence is set according to fault severity, and a multi-fault constraint preventing control problem is reduced in a dimensional aspect into a multiple single fault stability control decision problem; finally, a preventing control adjusting strategy capable of meeting requirements of all transient stability constraints is obtained. According to the method, in the adjusting process, the economic type of prevention control is considered, a corresponding adjusting gear is distributed for the power adjusting space of each fault, and a strategy, smallest in adjustment, meeting the requirements of operation modes of multiple fault constraints is confirmed through a parallel calculating mode.

The invention relates to the technical field of electric power, particularly relates to an active and passive frequency response switching control method, and specifically a frequency response controlmethod in a high-power deficiency fault. According to the method, for a two-regional power grid, a number line is adopted for representing an inter-region call wire, and an imaginary line is adoptedfor representing a communication line; A region is a disturbed region and a B region is a non-disturbed region; firstly, a unit thermal power generating unit mathematical model is established; and 2,an interconnected power grid mathematical model is established. By adoption of the method, frequency response is changed from dispersed autonomous control into concentrated coordination control, fromfeedback control into feedforward control, and from correction control to preventive control, and the overall frequency responsiveness of the system is improved under the premise of not increasing frequency response facility, thereby improving frequency stability defense capability under high disturbance; and frequency decline can be stopped effectively in a high disturbance frequency decline stage, system low frequency load shedding can be avoided, the system can be recovered to be stable in a frequency recovery stage as soon as possible, and frequency oscillation in the active control process of the system can be avoided.

A data driving method for dynamic safety assessment of an electric power system comprises the following steps: 1), obtaining operation data of the electric power system, constructing corresponding dynamic safety indexes, and constructing an initial sample set containing an operation data set and the dynamic safety indexes; 2) processing the initial sample set to achieve the purposes of data compression and dimension reduction, and generating an efficient sample set; 3) obtaining a dynamic safety assessment model; 4), obtaining a near-real-time updating sample set, and completing the updating of the dynamic safety evaluation model; and 5) completing evaluation of the real-time dynamic safety state of the power system to obtain a real-time dynamic safety evaluation result. The invention aimsto provide the dynamic safety assessment method which is beneficial to improving the assessment speed and the prediction precision, is beneficial to system operation personnel to take prevention andcontrol measures in time, and improves the operation stability and the power supply reliability of a power system.

The invention belongs to the technical field of air conditioner control, and discloses an air conditioner using fresh air and a control method. A fresh air machine continuously operates for X time, fresh air anti-condensation detection and judgment are conducted, the lowest operation time is not met, the fresh air machine does not detect a fresh air anti-condensation control program, and operationcontinues according to the current state; the fresh air machine meets the running time X, and the difference between the current dew point and the fresh air temperature is judged according to the indoor environment parameters and the fresh air outlet temperature; whether a fresh air anti-condensation control program is met or not is judged; each parameter meets the fresh air anti-condensation requirement, and the fresh air load adjusts each load state of the fresh air according to the fresh air temperature difference value; after each load state of the fresh air is adjusted, the fresh air outlet temperature time is higher than the dew point temperature value X1 time, and each load of the fresh air is adjusted to operate in an initial state. Similar materials such as sponge and flanneletteare not added, personnel operations are reduced, prevention and control measures are taken on the product reliability, and therefore, reliable operation of the air conditioner is ensured.

A capsular device for esthetic and therapeutic treatment, but particular involves a device for body treatment that allows emission of infrared together with negative ions, allowing easy elimination of toxins, heavy metals, preventive control of some diseases and postsurgical therapeutic treatment; said capsular device has a fixed structure equipped with a rail on which a perpendicular mobile chamber is mounted, which is made up of an individual base configured by seat and back, said base having protective side arms and articulated cover with control panel with computer screen and screen with images of the patient, which enable constant follow-up of measurement variations.

A focus adjustment apparatus recaptures an object even if the object goes out of a view angle during imaging. The apparatus performs a zoom control of detecting a movement condition of a camera and automatically shifts a zoom position to a wide angle side or a telephoto side on the basis of the movement condition. The zoom position and a focus position before the zoom position is shifted to the wide angle side are stored. A focal point adjustment is performed to bring the object into focus by moving a focus lens to a target position. When the zoom position is moved to the telephoto side, the stored zoom position is used as the target position. When the zoom position is being shifted to the wide angle side, the object is brought into focus by moving the focus lens and the stored focus position is used as the target position.

The invention discloses a prevention and control method considering the control mode of an IPFC. Various control modes of the IPFC are considered, and power system power flow calculation including a main control mode and an auxiliary control mode is performed by utilizing the power flow calculation iteration format under each control mode of the IPFC; a multi-objective optimization function integrating practicability and safety is constructed, and operation constraints of the power system and the IPFC are provided; and prevention and control power flow optimization of the power system is realized based on a particle swarm optimization algorithm. According to the invention, the static control potential of the IPFC can be fully mined, the optimization of power flow distribution during steady-state operation of the system is realized, and the practicability and the static safety level of the system are significantly improved.

A preventive cabin temperature controlling method based on real-time power of a fan unit belongs to the technical field of wind power. The invention relates to a wind generating set temperature control system, in particular to a nonlinear wind power generator temperature control system. According to the real-time power of a fan, processing is carried out through an algorithm, so that a heat dissipation curve is moved outwards, the heat dissipation power is increased, the residual amount is reserved after the temperature is adjusted, the hysteresis is eliminated, and the nonlinear and preventive control on the temperature of a cabin is realized. According to the preventive cabin temperature controlling method, the output power of the temperature control system is calculated and determined according to the real-time power and the rotating speed torque table of a wind turbine generator so as to control the temperature control system. The temperature adjusting capability is better while the output power of the temperature control system is larger as the real-time power of the wind turbine generator increases. As the slope of the power curve of the wind turbine generator becomes larger,namely, the power corresponding to the next rotating speed becomes larger, the output power of the temperature control system becomes larger, and the temperature adjusting capability is better.

The invention discloses a control method of thick plate rolling warping and bending. The control method comprises the steps that a large data analysis is carried out on rolling variety specifications,passes, reduction, upper and lower surface calculation temperatures and the occurrence time and characteristics of warping and bending through warping and bending detection device data to obtain thewarping and bending occurrence rule related to the rolling variety specifications; the preventive intervention is carried out in advance before the occurrence of warping and bending in control, so that the occurrence probability of the rolling warping and bending and the influence on production are reduced; and the effect generated after the intervention is measured and fed back to a computer again, the rule is calculated again, and the measures are circularly improved. The thick plate rolling production line can realize systematic analysis and preventive control on the rolling warping and bending, wherein the preventive control belongs to feed-forward type pre-control based on data accumulation, and can be circularly improved. The method summarizes the rule of the warping and bending, andcan effectively reduce the occurrence probability of the warping and bending in large-scale production.

The invention discloses an engine overspeed preventive control system, and relates to the technical field of heavy engineering equipment. The engine overspeed preventive control system comprises an overspeed preventive valve group, a closed plunger pump, an engine and a hydraulic motor. The overspeed preventive valve group comprises an oil port B2, an oil port B1, an oil port A2 and an oil port A1; the oil port B1 and the oil port B2 can be communicated with each other in the overspeed preventive valve group; the oil port A1 and the oil port A2 can be communicated with each other in the overspeed preventive valve group; an oil port B of the closed plunger pump can be communicated with the oil port B1, and an oil port A of the closed plunger pump can be communicated with the oil port A1; anoutput shaft of the engine is connected with the closed plunger pump; an output shaft of the hydraulic motor is connected with a speed reducer. The engine overspeed preventive control system has thetechnical advantages that the engine can be prevented from being damaged due to overspeed, the heat productivity of the engine overspeed preventive control system can be reduced, and the speeds can bemanually increased on the premises of long slope descending and non-overspeed engines.

The invention discloses an electric vehicle charging device base gangway. The electric vehicle charging device base gangway comprises a main body unit, an initial prestressed tension adjusting unit, ahighest prestressed tension adjusting unit and a maximum movement range adjusting unit, the main body unit is composed of a gangway hook, a gangway lug, a gangway support and an adjusting screw rod,the initial prestressed tension adjusting unit is composed of elastic force of the prefabricated radian of the gangway hook and the adjusting screw rod, the highest prestressed tension adjusting unitis composed of a gangway lug upper limit point and an adjusting screw rod center line position, and the maximum movement range adjusting unit is composed of a gangway lug starting acting point, a gangway hook starting position and a gangway hook position stopping acting point. According to the electric vehicle charging device base gangway, standard quality control in batch production, installation, debugging and use of a whole gangway part and a part is effectively realized, and prevention and control of loosening and separation of batch bases and a ground are further realized.

The invention relates to the technical field of power system automation, and aims to provide a transient stability prevention and control method for a power system embedded with a deep belief network.The method comprises the following steps: S1, determining an active output fluctuation range and a load fluctuation range of a generator, generating N generator active output samples, obtaining a large amount of initial state data, and performing time domain simulation calculation on the initial state data to generate sample data; S2, establishing the deep belief network, training the deep beliefnetwork by using the sample data, and fitting the active power output of the generator and the transient stability of the system to generate a transient stability evaluator of the power system; S3, adding a cost constraint, a power flow constraint and a stable operation constraint to the NSGA-II algorithm based on a transient stability constraint condition, and building an NSGA-II evolutionary algorithm model; and S4, obtaining a generator output fluctuation range and a load fluctuation range of transient instability under a fault, performing iterative optimization on the NSGA-II evolutionaryalgorithm model and solving a prevention and control strategy.

The invention provides a system for preventing overheating of a DPF device. The system comprises an oil consumption metering value, a timer, a mileage calculator, an optimization prevention controller, a basic prevention controller and a master control unit. The optimization prevention controller is configured to be used for calculating an oil consumption factor, an engine operation duration factor and a vehicle driving mileage factor and setting the maximum factor as a maximum optimization factor. The basic prevention controller is configured to be used for obtaining a carbon loading factor. The master control unit configured to be used for setting the larger one of the maximum optimization factor and the carbon loading factor as a prevention factor when an optimization prevention module is started being used or setting the carbon loading factor as the prevention factor when the module is forbidden; and the prevention factor is compared with a factor upper limit and a factor lower limit, an engine torque limiting function is triggered when the prevention factor exceeds the factor upper limit, the function is forbidden when the prevention factor is equal to or smaller than the factor lower limit, and the triggering state of the function is kept unchanged when the prevention factor is between the factor upper limit and the factor lower limit. The invention further discloses a method using the system.

The invention discloses a large water delivering and transferring unit preventive control method. The large water delivering and transferring unit preventive control method is characterized by comprising the following steps that firstly, temperature, vibration degree and lubricating oil amount data of a water pump motor and liquid level data of a water inlet pond are collected, the collected dataare sent to a unit control cabinet, and the unit control cabinet sends control signals to the water pump motor, a pump control valve, an overhauling valve and a monitoring instrument; secondly, the unit control cabinet controls running of the water pump motor, the pump control valve, the overhauling valve and the monitoring instrument; thirdly, the unit control cabinet detects unit exterior suddenchange signals and unit interior signal faults; and fourthly, corresponding measures are taken according to the detection result for preventive control. The large water delivering and transferring unit preventive control method solves the problem that in the unit producing and running process, due to exterior technology sudden changes or self faults, sudden shutdown is caused, and damage is caused; and advanced preventive measures are taken for a unit in the production process, automatic detection is timely, and protection measures are taken.