49results about How to "Load regulation" patented technology

The invention relates to an orderly charging system and method for an electric taxi charging station, and belongs to the field of intelligent power grid control. The system is composed of a battery management system, a batter charger, a charging point, an SCADA (supervisor control and data acquisition) system/a PQ (performance quality) monitoring system, an orderly charging control center and a batter charging information database. According to the background load of a to-be-predicted power grid and the demand on the charging power of an electric taxi, the optimal charging start time and the optimal charging phase plan are formulated for each electric taxi, and the electric power of the power grid at a valley period is fully utilized for charging a power battery of the electric taxi, so that the load of a superior transformer substation can be adjusted, the difference between the peak and the valley can be relieved, the load fluctuation of the power grid can be restrained, and the economy and the efficiency of the power grid are improved. Meanwhile, according to the single phase charging manner of the taxi, the optimal charging phase can be selected via the system, so the unbalance of the three-phase load can be reduced.

The invention discloses a load balancing method based on vector mapping. The method comprises the following steps of: obtaining the load information of physical nodes and virtual machines in a virtual cluster system; obtaining the physical nodes, for which the load condition needs to be regulated, according to the resource information, and calculating a balance degree to obtain the virtual machines to be migrated; converting and normalizing the three-dimensional resource of the virtual machines to be migrated and all the physical nodes, representing the converted and normalized resource in a space coordinate system in the form of three-dimensional vector; projecting the space coordinate system and the resource vector, grouping the projection vectors, and obtaining the group match of the physical nodes and the virtual machines; and for each group match, scheduling with an optimal descending order bin packing virtual machine to get the decision result. The technical scheme of the invention is used in a distributed cluster system, is supportive to differentiated, global and expandable scheduling of multi-dimensional resource, and is featured by high speed of decision making and high accuracy.

The invention provides a transformer fault detection method and a box-type transformer. The transformer fault detection method comprises the following steps of: judging whether an operation state of the transformer is abnormal or not through using first operation parameters of the transformer, and controlling and adjusting the operation state; judging whether a transformer fault exists in a winding or not according to second transformer operating parameters, wherein a winding fault verification program is used for verifying whether a fault actually occurs in the winding; detecting the type ofa winding fault through analyzing internal temperature; and conducting iron core fault type detection when the type of the winding fault is judged as an iron core fault according to the transformer vibration information through analyzing oil temperature, oil pressure and vibration signals of the transformer. The transformer fault detection method provided by the embodiment of the invention can accurately detect whether the transformer runs abnormally or fails or not, can judge the fault type and the specific position of the fault of the transformer, and is convenient for maintenance personnelto maintain and replace the transformer in a targeted manner especially for the box-type transformer with a large size.

The invention provides a test method of temperature control stability of a refrigerator. The method comprises the steps of: calculating the working time of each electrically controlled apparatus; carrying out an aging test on the refrigerator; carrying out a switching test on apparatuses in the refrigerator while carrying out the aging test on the refrigerator; and generating a service life test result of the refrigerator according to an aging test result and a switching test result. According to the test method of temperature control stability of the refrigerator provided by the embodiment of the invention, the aging test is carried out on the refrigerator by simulating an external environment of the refrigerator, such as external environment of high temperature and high humidity to accelerate aging of the refrigerator, and the switching test is carried out by accelerating switch-on and switch-off of an electrically controlled element on a circuit board of the refrigerator to truly simulate operation of the refrigerator, so that the service life of the refrigerator can be accurately tested. The method has the advantage of accurately testing the life cycle of the refrigerator.

The invention belongs to the technical field of ultra-precision active vibration reduction and discloses a measurement method for center-of-gravity position. The method is realized by a center-of-gravity measuring system. The center-of-gravity measuring system comprises a controller and more than two active shock absorbers, each active shock absorber cooperates with an actuator and a sensor, the active shock absorber is used for supporting a load, and a support point is formed at each active shock absorber. The measuring method comprises the following steps: S1, starting the center-of-gravitymeasuring system, the controller adjusting the output amplitude of each actuator, so that the load only has a response in the gravity direction; and S2, calculating according to the output amplitude of each actuator and the distance between adjacent support points to obtain the center-of-gravity position of the load. The invention further discloses a corresponding measurement system. According tothe measurement method, rapid identification of the center of gravity of the load of the precise active shock absorber is realized, without the help of extra sensors, the influence of the process on equipment is small, and the measuring precision is high.

The embodiment of the invention discloses an inter-cell load balancing method and device. The inter-cell load balancing method comprises the following steps that a first base station receives a first resource state request message which comprises a cell identifier of a cell to be measured; judging whether the cell to be measured is in an abnormal state, if so, the resource state of the cell in the abnormal state is set according to the type of the abnormal state of the cell in the abnormal state; if not, the cell in the non-abnormal state is measured to obtain the resource state of the cell in the non-abnormal state; the first base station sends a resource-state updating message to the second base station. The inter-cell load balancing method and device disclosed by the embodiment of the invention have the advantages that the setting of the resource state of the cell in the abnormal state according to the type of the abnormal state of the cell in the abnormal state and the returning of the resource state to the second base station are realized, so that the adjustment of load balance can be carried out by the second base station according to the returned resource state of the cell, and the effectiveness of the load-balance adjustment is provided.

The invention relates to the field of refrigerating equipment, in particular to a refrigerating system capable of automatically adjusting the refrigerant amount for a refrigerator. The refrigerating system for the refrigerator comprises a pipeline forming a loop, and a compressor, a condenser, a refrigerant amount adjustment device, a capillary pipe and an evaporator sequentially arranged on the pipeline, wherein when a refrigerant needs to be increased or reduced in the refrigerating system, a sealing part is separated from an opening so as to open the opening, a refrigerant in a storage cavity flows into the refrigerating system or the refrigerant in the refrigerating system flows into the storage cavity, and after a setting time, the sealing part fits to the opening so as to close the opening. The refrigerant amount adjustment device is switched on and switched off through the control on power on and power off of an electromagnet by a control piece, the refrigerant system for the refrigerator is simple in structure and convenient to control, under different externa conditions, a load of the compressor can be timely adjusted, the service life is long, and the energy consumption of the refrigerator is optimized, so that more energy can be saved, and a refrigerating effect is better.

The invention discloses a capacity electricity loaded hydraulic pump testing device which comprises a tested hydraulic pump, a hydraulic motor for loading and a computer measurement and control device, wherein the tested hydraulic pump is directly connected with the hydraulic motor for loading and is connected to a switching rectification device of an alternating current network through a frequency conversion motor for dragging the tested pump and an inversion device of the frequency conversion motor for dragging the tested pump in sequence; the hydraulic motor for loading is connected to the switching rectification device of the alternating current network through an alternating current dynamometer and an inversion device of the alternating current dynamometer in sequence; the computer measurement and control device is connected with the tested hydraulic pump, the hydraulic motor for loading, the inversion device of the frequency conversion motor for dragging the tested pump and the inversion device of the alternating current dynamometer respectively. The capacity electricity loaded hydraulic pump testing device has an energy-saving effect, and can realize loading of the tested pump. The device is simple in structure, flexible in configuration and convenient to operate, and the rotating speed and pressure of the tested hydraulic pump are independently controlled.

The invention discloses a preparation method of a nitrogen-doped spherical graphene loaded flaky molybdenum disulfide catalyst, which comprises the following specific steps: (1) adding an initiator into styrene and polyvinylpyrrolidone to prepare polyethylene microspheres with positive charges; (2) preparing a graphene oxide aqueous solution from graphite powder, sodium nitrate and 95% concentrated sulfuric acid; (3) adding the graphene oxide aqueous solution and a nitrogen-doped precursor into the polyethylene microspheres with positive charges, conducting reacting while stirring, filtering the reacted mixture, conducting drying to obtain a solid sample, and calcining the solid sample in a nitrogen atmosphere to prepare nitrogen-doped spherical graphene; and (4) adding the spherical graphene with the nitrogen-doped structure and ammonium tetrathiomolybdate into a reaction solvent for reaction, then conducting filtering and washing by using a washing solution, and conducting drying to obtain the nitrogen-doped spherical graphene loaded flaky molybdenum disulfide catalyst.

The invention discloses a millimeter wave filter circuit, and the circuit comprises a first switch unit used for receiving a radio frequency signal, wherein the first switch unit comprises a transformer circuit and a transistor control circuit; a filter which is used for filtering the radio frequency signal output by the first switch unit and outputting a filtered radio frequency signal; a secondswitch unit which is used for receiving the filtered radio frequency signal and comprises a transformer circuit and a transistor control circuit; a detector which is used for converting the radio frequency signal output by the second switch unit into an analog voltage signal; an A/D converter which is used for converting the analog voltage signal into a digital signal; and a control module which is used for receiving the digital signal and selecting the output port of the first switch unit and the input port of the second switch unit based on the digital signal. The millimeter wave filter circuit provided by the invention realizes the circuit performance of low insertion loss and high isolation in two different working states.

The invention discloses a heat exchange system. The heat exchange system comprises a first high-temperature heat storage medium conveying pipeline, a first low-temperature heat storage medium conveying pipeline, a second high-temperature heat storage medium conveying pipeline, a preheater, an evaporator, a superheater, a water feeding device and a steam turbine. Compared with the prior art, the heat exchange system has the innovative points that by arranging the second high-temperature heat storage medium conveying pipeline, when a heat storage medium coming from the superheater is cooled after being subjected to heat exchange and consequently cannot meet the load demand of the heat exchange system, a high-temperature heat storage medium can be supplemented into the evaporator through the second high-temperature heat storage medium conveying pipeline, the temperature of the heat storage medium entering the evaporator is increased, and accordingly, the purpose of improving load of the heat exchange system is achieved.

The invention discloses a load balancing method of PMIPv6. A routing management solid (RMS) establishes a load list, receives load condition sent by a local mobility anchor (LMA), writes the load condition in the load list, and regularly traverses the load list and adjusts load of LMA by sending load adjusting signaling; a load balancing device and a load balancing system of PMIPv6 are simultaneously disclosed.

The invention relates to an MEMS micro-pump diaphragm service life testing device and a testing method thereof. The MEMS micro-pump diaphragm service life testing device comprises a pressure storage container, a sensor interface is arranged at the top thereof, a valve interface and a pump interface arranged on the side surface, and a four-way pipeline arranged in the pressure storage container; three pipe orifices of the four-way pipeline are respectively communicated with a sensor interface, a valve interface and a pump interface, and the fourth pipe orifice downwards penetrates through the pressure storage container; a diaphragm is attached to the bottom surface of the pressure storage container at the fourth pipe orifice, and is driven by a piezoelectric plate to vibrate; the sensor interface is connected with a pressure sensor, the valve interface is connected with a pressure relief branch and an electromagnetic valve, and the pump interface is connected with a liquid supplementingbranch and a liquid supplementing pump; the electromagnetic valve and the liquid supplementing pump are controlled by a control unit to work, the pressure sensor is matched for monitoring, liquid with a preset pressure value is supplemented into the four-way pipeline, the piezoelectric plate drives the diaphragm to vibrate for a preset number of times under preset pressure, and the service life test is completed. The device is simple and compact, is convenient to use, achieves the testing of the service life of the micro-pump diaphragm, greatly reduces the testing period, and greatly reducesthe testing cost.

The invention relates to a range hood, comprising a central processing unit, a volute, an impeller and a motor. The motor is provided with a rotation speed detection assembly electrically connected tothe central processing unit; a first coil is peripherally disposed on the side surface of one side of the volute; and the volute is peripherally provided with a second coil that can be induced with the first coil. The invention further relates to a control method for the range hood, comprising: obtaining a motor rotation frequency b at a current working gear of the range hood; when requiring to optimize functional parameters of the range hood in a current working gear state, adjusting a power supply frequency of a speed adjustment power supply, and detecting and obtaining the functional parameters of the range hood under different power supply frequencies; and determining the power supply frequency corresponding to the optimal functional parameter as the working power supply frequency ofthe speed adjustment power supply. The range hood and the control method therefor can implement the adjustment of motor rotation speed by adjusting the motor load to achieve better performance.

The invention discloses a millimeter wave filtering frequency-selecting assembly, and the assembly comprises: a first single-pole N-throw switch which receives a millimeter wave signal and outputs themillimeter wave signal through one non-fixed output port; a filter bank which comprises N-1 dielectric filters which are connected in parallel between the two switches, wherein the millimeter wave signal output by the first single-pole N-throw switch is filtered by using a corresponding dielectric filter to output a filtered signal; and a second single-pole N-throw switch which receives the filtering signal through one non-fixed input port and outputs the filtering signal through the output port. Each of the first single-pole N-throw switch and the second single-pole N-throw switch comprisesa multi-coupling coil circuit and a transistor control circuit, port isolation is realized by utilizing the multi-coupling coil circuit, and a port load is adjusted by utilizing a load switching technology; and the first single-pole N-throw switch is provided with a fixed output port connected with a 50-ohm load, and the second single-pole N-throw switch is provided with a fixed input port connected with the 50-ohm load. According to the invention, low out-of-band rejection, low insertion loss and high isolation can be realized.

The invention discloses a slide valve loading and unloading structure capable of being accurately controlled, a screw compressor and a control method. The slide valve loading and unloading structure comprises a slide valve and a piston cylinder transmission mechanism. Two side cavities of a piston in the piston cylinder transmission mechanism communicate with the low-pressure air suction side andthe high-pressure air exhaust side of the compressor correspondingly. Electromagnetic valves are arranged on pipelines where the two side cavities of the piston communicate with the low-pressure air suction side and the high-pressure air exhaust side correspondingly. Due to the fact that refrigerating oil is introduced into the two side cavities of the piston, and the piston is pushed to move by utilizing the oil pressure difference of the two side cavities of the piston, so that the slide valve load is adjusted. As the oil cylinders on the two sides of the piston do not use gas, the problem of inaccurate slide valve loading due to leakage of gaseous refrigerants at the outer circle of the piston is effectively solved, the reliability of the compressor is improved, the load requirements ofall parts are met, and useless power consumption is reduced.