37results about How to "Voltage regulation" patented technology

The invention discloses a storage battery with an intelligent management function, and relates to the field of automobile storage battery design. The storage battery comprises a storage battery body as well as a detection unit, an executor and an intelligent module unit which are arranged on the storage batter body, wherein the detection unit is used for automatically detecting a state of the storage battery; the executor is used for adjusting the state of the storage battery; and the intelligent module unit is used for processing feedback information of the detection unit of the storage battery and controlling the executor based on an information processing result so as to correct the state of the storage battery. Therefore, the storage battery is more intelligently maintained; the performance of the storage battery is improved; the service life of the storage battery is prolonged; and the negative influence on a vehicle due to a storage battery fault is effectively prevented.

This invention relates to a control method for storage cells used in photovoltaic merging system including solar systems from the first path to n path, in which, each path system includes a photovoltaic array, the output of which is connected with a charge circuit, the output of which is connected with a storage cell, a sample circuit is set to be connected to a load, the CPU process unit controls the charge circuits from 1 to n, a voltage current double closed loop is applied to carry out parallel control with PRI, when the voltage or current of the cell reaches to the threshold, solar energy input of certain paths is cut off / closed one by one, and when the voltage or current of the cell reaches to the maxium or minimum threshold, all of them are cut off / closed.

The invention relates to a temperature reduction and pressure reduction stable heat supply device comprising a controller, a conveying pipe, a steam pipe and a condensation device. A temperature reduction device, an adjustable pressure reduction device, a pressure stabilizing device, a temperature and pressure sensor and a safety valve are sequentially arranged on the conveying pipe from left to right. The outlet end of the steam pipe is inserted in the left end of the conveying pipe. The condensation device communicates with the outlet end of the safety valve. The temperature and pressure sensor is electrically connected with the controller. According to the temperature reduction and pressure reduction stable heat supply device, temperature is reduced through the temperature reduction device, pressure is reduced through the adjustable pressure reduction device, pressure is stabilized through the pressure stabilizing device, the temperature reduction and pressure reduction effect on high-temperature and high-pressure steam is good, and the steam output pressure is stable.

The invention relates to the field of industrial machineary and specifically relates to a double-fed aerogenerator. The double-fed aerogenerator comprises a wound rotor induction motor, the wound rotor induction motor is connected with a rotor-side inverter, the rotor-side inverter is connected with a network-side inverter through a DC line, the network-side inverter is connected with a power network, the power network and the wound rotor induction motor are connected, when the wound rotor induction motor rotates, energy goes into a rotor loop through the rotor-side inverter, through basic control of the network-side inverter, DC voltages are maintained constant and it is ensured that a power factor absorbed from the power network is 1, the rotor-side inverter is individually controlled, the power factor of the generator is controllable, and reactive power can be provided for the power network so as to adjust voltages of the power network.

The invention discloses a power network voltage regulation and control system and method for wind power generation. The system comprises a first reactive power compensation device, a second reactive power compensation device, a third reactive power compensation device, a first tap gear, a second tap gear, a collection device and a substation monitoring device, wherein the first reactive power compensation device is arranged on a high-voltage side bus of a regional master station connected with a wind power plant; the second reactive power compensation device is arranged on a medium-low voltage side bus of the regional master station; the third reactive power compensation device is arranged on a medium-low voltage side bus of a regional slave station connected with the regional master station; the first tap gear is located on the regional master station; the second tap gears are located on the regional slave station; the collection device is used for collecting a voltage parameter and a power factor parameter in a wind power grid; and the substation monitoring device is used for controlling the corresponding tap gears and / or reactive power compensation devices to be switched according to the voltage parameter and the power factor parameter collected by the collection device. The reactive power adjustment ability of the regional power grid is improved under the condition that a power transmission line from wind power to a substation is relatively long; and the switching frequencies of the reactive power compensation devices are reduced.

In accordance with systems and methods of the present disclosure, an apparatus may include a power converter and a controller. The controller may be configured to monitor a voltage at an input of the power converter, cause the power controller to transfer energy from the input to a load at a target current, decrease the target current responsive to determining that the voltage is less than or equal to an undervoltage threshold, and increase the target current responsive to determining that the voltage is greater than or equal to a maximum threshold voltage.

The invention discloses a performance test device based on an anti-ferroelectric material. The performance test device comprises a signal frequency collection circuit, a wave detection calibration circuit and a wave filtering compensation circuit, wherein the signal frequency collection circuit uses a signal frequency collector J1 with the model of SJ-ADC for collecting data signal frequency received by a control terminal in the performance test device based on the anti-ferroelectric material; the wave detection calibration circuit is divided into two paths to receive signals output by the signal frequency collection circuit; a first path uses a capacitor C2 to filter away noise of low-frequency signals; a second path uses a triode Q2 and a capacitor C3 to filter away noise in high-frequency signals; finally the first path of signals and the second path of signals are input into the in-phase input end of an operation amplifier AR3; the wave filtering compensation circuit uses an inductor L2, a resistor R17, the capacitor C7 and a capacitor C8 for forming a wave filtering circuit to filter away noise waves in output signals; then, output is performed; the signals can be subjected tofrequency modulation and voltage stabilization in real time by using data signal frequency received by the control terminal in the performance test device based on the anti-ferroelectric material; and the signal distortion is prevented.

The invention presents an inverter and a boost control method and control device thereof, and a front-stage circuit, which relate to the field of electronic circuits. Through a front-stage circuit with a set structure, the voltage of a single-stage inverter can be adjusted. In addition, by reasonably setting the direct proportion of the inverter bridge, the voltage of the inverter can be boosted by any multiple. Through the setting of a front-stage circuit structure and an energy storage element thereof, the upper and lower bridge arms of the inverter can be directly connected without inserting dead time, the output waveform is improved, and the quality of the output voltage is improved.

The invention provides a butt joint device and a cooling fan, and the device comprises a first butt joint structure which comprises a first metal coil suitable for being connected with a first AC wireand a first insulation shell surrounding the first metal coil; a second butt joint structure which comprises a second metal coil suitable for being connected with a second alternating current wire and a second insulation shell surrounding the second metal coil; and a metal core which is suitable for being at least partially and simultaneously arranged in the first metal coil and the second metalwire in a working state. According to the butt joint device, the metal coils is arranged in an insulating shell according to the principle of a transformer, direct contact between the conductive partsis avoided, so that the butt joint device is prevented from electric leakage due to contact between the conductive parts and the outside in the power-on process, the power utilization safety is ensured, wireless transmission of current is realized, meanwhile, the voltage of an electric wire can be adjusted, and the application range is wider.

The invention provides a voltage regulating transformer which comprises a main transformer body and a string transformer body. The main transformer body comprises a main transformer public coil, a main transformer series-connection coil and a main transformer voltage regulating coil, wherein the main transformer public coil and the main transformer series-connection coil are in series connection with a wire inlet end, and the main transformer voltage regulating coil is in electromagnetic coupling with the main transformer public coil and the main transformer series-connection coil. The string transformer body comprises a string transformer primary coil and a string transformer secondary coil, wherein the string transformer primary coil and the string transformer secondary coil are mutually in electromagnetic coupling, the string transformer primary coil is in series connection with a main transformer voltage regulating coil, and the string transformer secondary coil in series connection with the main transformer series-connection coil is connected with a wire outlet end. A rank difference voltage regulating method of the voltage regulating transformer includes the following steps that transmission voltage in the string transformer secondary coil is changed through regulating of the number of turns of the connected main transformer series-connection coil; the number of turns of the connected main transformer voltage regulating coil is regulated, so that sensing voltage in the string transformer secondary coil is changed, the sensing voltage and / or the transmission voltage are / is regulated, so that voltage of the wire outlet end of the voltage regulating transformer is changed, wherein the voltage of the wire outlet end is equal to the algebraic sum of the transmission voltage and the sensing voltage.

The invention provides a solar DC voltage increase and stabilizing type charging power supply. The solar DC voltage increase and stabilizing type charging power supply comprises a solar battery, a storage battery pack, a power-shortage protection circuit, an adjustable square wave circuit, a DC voltage increase circuit and a DC adjustable voltage stabilizing circuit which are sequentially connected; the solar battery is used for photoelectric conversion; the electricity energy produced by the photoelectric conversion of the solar battery is used for charging the storage battery pack, and the nominal voltage of the storage battery pack is 6V; the power-shortage protection circuit is used for stopping discharging of the storage battery pack when the end voltage of the storage battery pack is less than 5.7V; the adjustable square wave circuit outputs a square wave impulse signal of which the duty ratio K is adjustable and is not less than 50%; the DC voltage increase circuit increases the voltage through the resistance adjusting of a first potentiometer; the DC adjustable voltage stabilizing circuit is used for stabilizing the voltage of the DC voltage increase circuit by the synchronous adjusting of a double-link adjustable potentiometer, and the stable output voltage ranges from 10 to 230V. The solar DC voltage increase and stabilizing type charging power supply has the advantages of being applicable to charging of electronic devices with different charging voltage types, energy saving, environmentally friendly, charging on real time, and being flexible and convenient to charge.

The invention discloses a power grid intelligent voltage regulator on-load tap machinery switch comprising a housing in a rectangle structure; a support plate is arranged on the bottom outside the housing; a wire port is arranged above the support plate of the housing; a core 1 and a core 2 are fixed in the housing via insulation supports, and respectively in an oval structure; a first level coil,a second level coil, a third level coil and a fourth level coil are arranged from left to right in sequence outside the side wall of the core1 and core 2; three light rods are arranged in middle of the core 1 and the core 2; the power grid intelligent voltage regulator on-load tap machinery switch employs an electromagnet as the power input, uses weak current for heavy current control, and the housing is filled with an inert gas, thus preventing arcing when contacts open and close, and preventing equipment fire ignition.

The invention relates to the technical field of pressure boosting and delivering of compressed air, and particularly belongs to a pressure boosting and stabilizing system for an air source of a workshop. The pressure boosting and stabilizing system for the air source of the workshop is characterized by comprising an air inlet system, an air outlet system and a pressure stabilizing system, wherein the air inlet system comprises an air inlet pipeline and an air inlet pressure boosting pipeline; the air outlet system comprises an air outlet pipeline and an air outlet pressure boosting pipeline; the pressure stabilizing system comprises an air storage tank; the air inlet pipeline comprises a master air station, an air inlet one-way valve, an air inlet pressure gauge and an air inlet gate valve which successively communicate with one another; and the air inlet pressure boosting pipeline comprises a pressure boosting air pump, an air inlet pressure boosting one-way valve and an air inlet pressure boosting gate valve which successively communicate with one another. By the pressure boosting and stabilizing system for the air source of the workshop, pressure boosting, pressure stabilizing and drying of the compressed air can be realized simultaneously. Because the pressure boosting and stabilizing system for the air source of the workshop is close to a service terminal of equipment, the adjusted air source can be stably used. In conclusion, the pressure boosting and stabilizing system for the air source of the workshop has the positive effect of stable pressure of the air source.

The invention discloses a power grid intelligent voltage regulator on-load tap machinery switch comprising a housing in a rectangle structure; a support plate is arranged on the bottom outside the housing; a wire port is arranged above the support plate of the housing; a core 1 and a core 2 are fixed in the housing via insulation supports, and respectively in an oval structure; a first level coil,a second level coil, a third level coil and a fourth level coil are arranged from left to right in sequence outside the side wall of the core1 and core 2; three light rods are arranged in middle of the core 1 and the core 2; the power grid intelligent voltage regulator on-load tap machinery switch employs an electromagnet as the power input, uses weak current for heavy current control, and the housing is filled with an inert gas, thus preventing arcing when contacts open and close, and preventing equipment fire ignition.

The invention discloses a UHVDC transmission control method and control device based on a calculation voltage value. A midpoint voltage measurement fault is determined according to a 12-12 pulsating DC pole midpoint voltage measurement value or a midpoint voltage measurement point feedback signal, and a valve group voltage calculation value is employed as a feedback voltage for control; a voltage correction unit is configured at a rectification side, difference of the valve group voltage calculation value and a valve group voltage reference value is superposed to difference of a valve group current measurement value of a current adjusting unit and a valve group current reference value, and a trigger delay angle of a valve group is controlled through a PI adjusting device according to the result; a voltage control unit is configured at an inversion side, the trigger delay angle of the valve group is controlled through the PI adjusting device according to the difference of the valve group voltage reference value and the valve group voltage calculation value. The method is advantaged in that stable voltage control on UHVDC can be realized without a 12-12 pulsating DC pole midpoint voltage measurement point or under a voltage measurement point fault. The invention further discloses a UHVDC transmission control device based on the calculation voltage value.