268 results about "Capacitive energy storage" patented technology

The utility model discloses a zero interruption dual power supply fast switching device, comprising a dual power supply switch, a power electronic assembly, an output switch QF and a load which are connected in sequence, the power electronic assembly comprises an electronic bypass unit VT, a mechanical bypass contactor KM, an isolation transformer TM, a bidirectional converter CU and a super capacitor energy storage unit CAP, a contact S1 in the dual-power switch is connected with a main power supply, a contact S2 is connected with a standby power supply, a mechanical bypass contactor KM is connected with an electronic bypass unit VT in parallel, an isolation transformer TM is connected to the output end of the electronic bypass unit VT, and the two ends of a bidirectional converter CU are connected with the isolation transformer TM and a super capacitor energy storage unit CAP respectively. According to the device, the dual-power-supply change-over switch is matched with the power electronic component, so that rapid switching of the dual-power-supply switch is realized, the problem of power supply interruption in the switching process is solved, and the reliability of power supply is improved; and meanwhile, few energy storage elements are used, and the cost is low.

The invention discloses a hybrid energy storage capacity optimal configuration method for stabilizing wind power fluctuation, and belongs to the technical field of wind power generation, and the method comprises the steps: carrying out the clustering of wind power output data based on a K-means clustering algorithm, and obtaining a plurality of wind power output scenes; the wind power output data is decomposed based on an empirical mode decomposition method to obtain a multi-order intrinsic mode function, the multi-order intrinsic mode function is reconstructed into a low-frequency component and a high-frequency component, the low-frequency component is directly connected to a grid, the high-frequency component serves as a power task of the hybrid super-capacitor energy storage system, and the hybrid super-capacitor energy storage system is defined as a target system; establishing a capacity configuration model of the target system, and respectively constructing an optimization objective function and a model constraint set of the capacity configuration model based on the cost input and the constraint condition of the target system; and solving the capacity configuration model based on a genetic algorithm to obtain an initial optimization result, introducing a variable reference line and a fluctuation penalty coefficient, and performing optimization again. According to the invention, the efficiency of stabilizing the wind power fluctuation is improved.

The invention discloses an efficient charging and discharging control method and system for a capacitive energy storage welding machine, and the method comprises the steps: the capacitive energy storage welding machine monitors the voltage, current and temperature of a capacitor in real time through a battery management system, and determines the system state and the environment temperature; in the direct current discharging mode, the system dynamically adjusts the charging and discharging rate through an inverter and a self-adaptive control algorithm, and voltage output is smoothed; in the indirect discharge mode, a welding transformer is adopted to reduce the voltage and accurately control the frequency and time of the inverter; the system automatically adjusts charging and discharging current and discharging time according to the thickness, speed and temperature of a welding material, and intelligently switches modes; a multi-safety protection mechanism ensures the safety of the welding process, and a power supply is automatically adjusted or cut off when abnormity occurs; according to the efficient charging and discharging control method and system for the capacitive energy storage welding machine, the safety of the welding-free transformer capacitive energy storage welding machine is improved, the phenomena of huge sound and metal splashing are reduced, meanwhile, the energy utilization efficiency is improved, the welding quality is improved, and the production efficiency is enhanced.

The utility model relates to an electrolytic capacitor energy storage type relay driving circuit for an electricity meter and terminal equipment. The electrolytic capacitor energy storage type relay driving circuit comprises a processing unit, an electrolytic capacitor energy storage unit, a driving unit and an electric pull-in relay, the input end of the electrolytic capacitor energy storage unit is used for being connected with a power supply end; a first input end of the driving unit is connected with the electrolytic capacitor energy storage unit or the power supply end, and a second input end and a third input end of the driving unit are in communication connection with the processing unit; the first input end of the electric pull-on relay is connected with the first output end of the driving unit to indirectly conduct the first input end, the second input end and the third input end of the driving unit; the second input end of the electric pull-on relay is connected with the second output end of the driving unit to indirectly conduct the first input end, the second input end and the third input end of the driving unit, and the output end of the electric pull-on relay is used for being connected with a load circuit. The utility model solves the problems of high energy consumption and low response speed.

The invention discloses a coupling type optimization method and device for energy storage frequency modulation of a super capacitor and a storage medium, and belongs to the technical field of wind power generation. The method provided by the invention integrates the polynomial coupling technology, and aims to gradually approach the dynamic change of the real wind speed, thereby improving the accuracy of wind speed prediction. A random sequence is generated through multiple iterations, an original wind speed sequence can be well fitted, the closest wind speed data is screened out, and a solid data foundation is laid for subsequent wind speed prediction; activation processing is introduced, so that the nonlinear expression capability of prediction data is enhanced, and the prediction accuracy is further improved; meanwhile, the first predicted value sequence and the second predicted value sequence are activated, the advantages of polynomial prediction and neural network prediction are combined, and the comprehensiveness and accuracy of wind speed prediction are improved.

The invention discloses a super-capacitor energy storage boost control electric energy meter high-power load switch circuit and a control method, and relates to the technical field of power systems, and the circuit comprises a charging circuit which comprises a charging branch electrically connected with a voltage-stabilized power supply and a super-capacitor electrically connected with the charging branch; the boost circuit is electrically connected with the output end of the charging circuit and comprises a power supply branch, a boost chip electrically connected with the power supply branch and a voltage division branch; and the driving circuit is electrically connected with the output end of the booster circuit and comprises a driving chip and a load switch electrically connected with the driving chip. According to the method, the occupied area of the circuit board is reduced, the space is saved, the existing super-capacitor is fully utilized, the cost is reduced, the super-capacitor discharges at a high rate, the service life is long, and the reliability is improved.

The invention relates to a method for dynamically eliminating residual magnetism of an iron core of a converter transformer, and belongs to the field of transformer demagnetization. According to the method, a capacitance energy storage and release device is connected to the two ends of a transformer winding, capacitance energy storage causes RLC oscillation of the transformer, a magnetic field is generated through current caused by the RLC oscillation, and magnetic domains of iron core ferromagnetic materials are rearranged through the changed magnetic field, so that the demagnetization effect on residual magnetism of the transformer is achieved. The method comprises the following steps: drawing a hysteresis loop in the demagnetization process of a transformer by collecting voltage and current data in the demagnetization process, translating an end point of the hysteresis loop to an original point, and judging the residual magnetism direction and size of initial demagnetization according to the area of each quadrant of the hysteresis loop; and then transformer demagnetization is carried out again, the residual magnetism direction and size of the first demagnetization are evaluated according to the hysteresis loop of the second demagnetization, and whether the residual magnetism is smaller than a threshold value is judged. According to the method, the direction and size of residual magnetism in the demagnetization process can be evaluated in real time, the demagnetization energy is dynamically adjusted, and sufficient demagnetization of the converter transformer is ensured.

The invention relates to the technical field of power system control, and discloses a photovoltaic energy storage primary frequency modulation cooperative control system based on output prediction and SOC balance, which comprises a photovoltaic array unit, a photovoltaic inverter, a sodium ion super capacitor energy storage unit, a bidirectional DC / DC converter and a cooperative controller. The cooperative controller is configured to identify an output trend by using photovoltaic power prediction data, and dynamically adjust an energy storage SOC reference anchor value; a source storage virtual impedance model considering the real-time efficiency characteristic of the sodium ion super capacitor is constructed, and the primary frequency modulation power demand is dynamically allocated. When the state of the energy storage unit deteriorates, the power compensation amount is calculated through photovoltaic load shedding sliding mode offset control, and the closed-loop target of the photovoltaic inverter is corrected to share the frequency modulation task. And after the frequency modulation is finished, controlling the photovoltaic power to recover by adopting an asymmetric step length. The method solves the problems that the energy storage standby is not matched and the response capability is reduced under the extreme working condition, and improves the frequency modulation stability of the system.

A fault suppression control method based on a capacitive energy storage system comprises the steps that a DC / DC converter of the capacitive energy storage system is constructed, a voltage and current double-closed-loop control structure of the capacitive energy storage system in a charging mode and a discharging mode is constructed based on the DC / DC converter, and the voltage of an energy storage capacitor or a filter capacitor serves as an outer loop control variable; the current of the energy storage inductor is used as an inner loop control variable, turn-on and turn-off signals of a switching device are output through PWM modulation, and finally fault suppression control is achieved after current-limiting control parameter optimization. Energy absorption and release between the ship power system and the energy storage capacitor are realized by adopting the bidirectional DC / DC converter, fault current suppression during a fault is realized, meanwhile, the requirement on a current limiting reactor is reduced, the cost of system elements is reduced, and the influence of reactor installation on the system is avoided.

The method is applied to the fields of train regenerative braking energy utilization, stray current and rail potential treatment and the like in electrified rail transit, especially urban rail transit. The invention provides a direct-current traction power supply system capable of reducing the energy storage capacity of a super capacitor of urban rail transit, which is combined with a super capacitor energy storage device of the urban rail transit and supplies power to a power electronic device for treating stray current and rail potential by utilizing regenerative braking energy of a train. The super-capacitor energy storage device has the following advantages that on one hand, the energy storage capacity of the super-capacitor bank in the super-capacitor energy storage device between train braking and traction can be reduced, and the utilization efficiency of regenerative braking energy stored by the super-capacitor bank is improved; on the other hand, the problems of stray current, rail potential and the like in the system can be solved from the source, and the power supply distance of a traction substation is remarkably increased. Therefore, the direct-current traction power supply system is of great significance to green and safe operation of urban rail transit.

The invention discloses a super capacitor energy storage frequency modulation optimization method and device, a medium and a program product, and belongs to the technical field of wind power generation. According to the method provided by the invention, the wind speed sequence is traversed, and the subsequences with similar trends are identified and merged, so that the prediction accuracy is improved; meanwhile, the method comprises an intelligent judgment mechanism, when it is judged that an excessive merging phenomenon exists in a merging result, splitting processing is carried out on a wind speed sequence, prediction and error evaluation are carried out again, and prediction errors are further reduced by adjusting a data structure in the wind speed sequence. By adopting the method, the accuracy of wind speed prediction can be effectively improved, and the prediction error is reduced, so that the coordinated operation capability between a wind power plant and a power grid is optimized, and the stability and reliability of a power system are improved. In addition, the method is also combined with the quick response capability of the super-capacity energy storage system, the error between the actual emitted power and the predicted power of the wind power plant can be made up, and the credibility of power grid dispatching is further improved.

The invention discloses a self-adaptive optimization method for energy storage frequency modulation of a super capacitor and a related product, and belongs to the technical field of wind power generation. The invention provides a self-adaptive optimization method for energy storage frequency modulation of a super capacitor, and the method comprises the steps: collecting wind speed data, building an original wind speed sequence, dividing the original wind speed sequence into a prediction set and a verification set, and adjusting and correcting the original data of the wind speed sequence based on an actual value and a predicted value in the wind speed sequence of the verification set; a difference error and a proportion error are calculated, correction parameters are calculated according to the difference error and the proportion error, self-adaptive adjustment of a prediction model is achieved, inherent rules and characteristics of original data of a wind speed sequence are more effectively mined and utilized through iterative optimization of a prediction result, then the accuracy and reliability of wind speed prediction are improved, and the precision of wind speed prediction is ensured. A data basis with higher precision is provided for a super-capacity energy storage system, and energy waste caused by wind energy fluctuation is reduced.

The invention discloses a charging voltage control method and system for a capacitive energy storage welding machine, and the method comprises the steps: monitoring the voltage, current and temperature of a capacitor in real time in a charging process, and obtaining data through a sensor, and inputting the data into a controller; the controller dynamically adjusts the charging voltage according to the real-time feedback, and calculates and adjusts the power output by adopting a self-adaptive algorithm; if the temperature of the capacitor reaches the set threshold value, the charging voltage is automatically adjusted or the charging rate is reduced, and the charging voltage is adjusted according to the welding load change; the upper limit of the charging voltage and the charging time are dynamically adjusted according to the working state of the capacitor through an optimization algorithm, so that the capacitor is ensured to operate in a safe interval; the system combines welding parameters, dynamically optimizes charging voltage and current output, and ensures that the charging process is stable and efficient.

The invention discloses a plasma ignition circuit capable of adaptively adjusting voltage frequency. A power supply VCC is connected to a high-voltage arc striking circuit and a high-frequency pilot arc circuit, and the high-voltage arc striking circuit and the high-frequency pilot arc circuit are both connected to the ground; the arc striking positive end and the arc striking negative end of the high-voltage arc striking circuit are connected to the output protection circuit, the pilot arc positive end and the pilot arc negative end of the high-frequency pilot arc circuit are connected to the output protection circuit, and the output positive end and the output negative end of the output protection circuit are connected with an ignition electric nozzle of the aero-engine. The high-voltage arc striking circuit is used for generating high-voltage and low-current voltage pulses and puncturing a discharge gap of the ignition electric nozzle after being output by the output protection circuit; the high-frequency pilot arc circuit is used for generating a high-frequency voltage source through a high-frequency sine wave signal, and the high-frequency voltage source generated by the high-frequency pilot arc circuit is used for generating an electric arc after a discharge gap of the ignition electric nozzle is broken down, so that an ignition function is realized; wherein the high-frequency pilot arc circuit is internally provided with two MOS (Metal Oxide Semiconductor) tubes, the two MOS tubes are alternately conducted in a positive half cycle or a negative half cycle of a high-frequency sine wave signal, and a resonant loop is formed in the high-frequency pilot arc circuit, so that current in the circuit is output to the ignition electric nozzle according to sine waves of resonant frequency. According to the technical scheme, the problems that an existing capacitive energy storage ignition circuit is usually applied to a low-power ignition system with the power smaller than 100 w, and the high-altitude ignition effect is poor are solved.

A display panel and a display apparatus. The display panel comprises an electronic-paper display unit and a display control circuit. The display control circuit comprises a capacitor energy storage module, an antenna module, a control module and a comparator, wherein the antenna module is connected to the capacitor energy storage module, and charges the capacitor energy storage module in response to a radio-frequency signal; the control module is connected to the capacitor energy storage module and the electronic-paper display unit; the comparator is connected to the control module and the electronic-paper display unit; and when the voltage of the capacitor energy storage module is greater than a preset threshold voltage, power is supplied to the electronic-paper display unit.

The invention discloses a dynamic multi-interval charging and discharging voltage threshold value adjusting method based on deep reinforcement learning by adopting a multi-train super-capacitor energy storage system aiming at the problem of traction network voltage safety and stability caused by high power and high energy of an urban rail transit multi-train energy storage system circuit model. According to a super-capacitor double-cascade control part of charge and discharge voltage thresholds, the charge and discharge voltage thresholds of a multi-train super-capacitor energy storage system (SC-ESSs) are dynamically adjusted according to intervals in real time by adopting a deep reinforcement learning (Soft Actor-Critic SAC) algorithm, and online strategy updating and sequential decision execution are further designed, so that the online strategy updating and sequential decision execution are realized. On-line strategy learning and optimization are carried out by combining'trial and error 'and'feedback' mechanisms of the agent, so that the training efficiency and optimization accuracy of the agent are improved, the energy-saving and voltage-stabilizing characteristics of the traction network are effectively improved, the charging and discharging current of the ground super capacitor can be stably controlled, the over-charging and over-discharging phenomena are prevented, and the service life of an energy storage element of the super capacitor is prolonged.

The invention provides a super capacitor energy storage system whole cluster health state assessment method and system, and relates to the technical field of battery management. The method comprises the following steps: acquiring electrical parameters and temperature parameters of each monomer unit in an energy storage cluster in real time; generating a dynamic weight coefficient based on the performance difference between the monomers; performing individual health status assessment based on a plurality of physical degradation mechanisms; fusing the health states of the monomers into a module health state based on the dynamic weight coefficient; generating the health state of the whole cluster through a decision rule based on the state dispersion characteristics between the modules; and establishing a bidirectional feedback mechanism of the health state and the charge state. According to the design, from data acquisition, difference quantification to hierarchical fusion, a local-intermediate-overall multi-scale evaluation logic is formed, the credibility of whole cluster SOH evaluation is remarkably improved, and more reliable technical support is provided for reliable operation, residual life prediction and economical efficiency optimization of an energy storage system.

The invention belongs to the technical field of micro-grids, and particularly relates to a distributed micro-grid system and a dispatching control method thereof.The micro-grid system comprises a wind power generation device, a photovoltaic power generation device, a hydroelectric power generation device, a tidal energy power generation device and a diesel engine power generation device; the energy storage equipment comprises a storage battery energy storage device, a super capacitor energy storage device, a flywheel energy storage device and a water electrolysis hydrogen production and fuel cell energy storage device; the water electrolysis hydrogen production and fuel cell energy storage device comprises a water electrolysis device, a hydrogen storage tank and a fuel cell; the water electrolysis device is connected with the alternating current bus through an electrolysis control switch and conveys prepared hydrogen to the hydrogen storage tank for storage, and the hydrogen storage tank is connected to the fuel cell through a hydrogen control valve. A micro-grid energy optimization scheduling problem is described as a Markov decision process, and a WGAIL-based energy optimization scheduling solving algorithm is adopted, so that the stability of a training process is improved, a better strategy can be obtained, and the energy optimization scheduling of the micro-grid can be realized.

The present invention discloses a hybrid energy storage capacity optimization configuration method for smoothing wind power fluctuations, which belongs to the field of wind power generation technology, including: clustering wind power output data based on the K-means clustering algorithm to obtain a variety of wind power output scenarios; decomposing wind power output data based on the empirical mode decomposition method to obtain multi-order intrinsic mode functions, and reconstructing them into low-frequency components and high-frequency components, the low-frequency components are directly connected to the grid, and the high-frequency components are used as the power task of the hybrid supercapacitor energy storage system, and the hybrid supercapacitor energy storage system is defined as the target system; establishing a capacity configuration model for the target system, and constructing the optimization objective function and model constraint set of the capacity configuration model based on the cost input and constraint conditions of the target system; solving the capacity configuration model based on the genetic algorithm to obtain the initial optimization result, introducing a variable baseline and a fluctuation penalty coefficient, and performing further optimization. The present invention improves the efficiency of smoothing wind power fluctuations.

The invention discloses a super capacitor energy storage frequency modulation method and device, a medium and a program product, and belongs to the technical field of wind power generation. According to the super capacitor energy storage frequency modulation method provided by the invention, wind speed data are collected, an original wind speed sequence is established, the original wind speed sequence is divided into a first prediction set and a first verification set, and a reference error is predicted and calculated by using the first prediction set; performing position pseudo-random interchange on the subsequences in the first prediction set to generate a plurality of transformed wind speed sequences; dividing the transformed wind speed sequence into a second prediction set and a second verification set, and predicting and calculating a prediction error parameter by using the second prediction set; according to the method, the inherent rules and characteristics of the wind speed data can be fully utilized, the accuracy and reliability of wind speed prediction are improved through the position pseudo-random interchange technology, and more accurate data support is provided for grid-connected dispatching of a wind power plant.

The invention relates to an extended-range air-cooled hydrogen fuel cell hybrid power system and a vehicle. The system comprises a fuel cell system, a super capacitor energy storage system, a bus system, a lithium battery range extending system, a main control system, a first DC-DC conversion module and a second DC-DC conversion module, the super capacitor energy storage system is charged through the fuel cell system; the super capacitor energy storage system is electrically connected with the bus system and the master control system through the second DC-DC conversion module. The lithium battery range extending system is provided with a lithium battery; when the load is relatively low, the lithium battery range extending system controls the fuel battery system to charge the lithium battery; when the load is relatively high, the lithium battery range extending system controls the fuel cell system and the super capacitor energy storage system to supply power to the load; when the fuel cell system runs out of energy, the lithium battery supplies power to the load. According to the scheme, the requirement for the large transient power limit needed by the system can be met, and efficient operation and long-distance cruising ability of the vehicle are ensured.

The invention is suitable for the technical field of electronic circuits, and provides a DC / DC and super capacitor cooperative control system of a station DC flexible intelligent bus coupler device, which comprises a bus coupler device, a DC bus, a bidirectional DC / DC converter and a super capacitor energy storage unit, the system is used for controlling the bidirectional DC / DC converter and the super capacitor energy storage unit to operate cooperatively so as to maintain the voltage stability of the DC bus. Monitoring the actual voltage value of the DC bus in real time; according to the deviation between the actual voltage value and the set value, the instantaneous output power proportion of the super capacitor energy storage unit and the steady-state output power proportion of the bidirectional DC / DC converter are dynamically adjusted; and when it is detected that the DC bus voltage deviation exceeds a preset threshold value, the super capacitor energy storage unit is preferentially controlled to carry out instantaneous power compensation, and the output power of the bidirectional DC / DC converter is adjusted to carry out steady-state power following. The problems of bus voltage transient instability, super capacitor over-discharge aging and low system operation efficiency are solved.

The invention relates to the technical field of new energy, in particular to a super-capacitor energy storage system, regulation and control equipment comprising the system and an energy regulation and control method of the super-capacitor energy storage system, and the system comprises a super-capacitor unit, a super-capacitor management system unit, a high-voltage box unit, a current conversion unit and an energy management system unit. The high-voltage box unit is respectively connected with the current conversion unit, the super capacitor management system unit and the super capacitor unit; the energy management system unit is respectively connected with the current conversion unit and the super capacitor management system unit; the super capacitor management system unit is provided with three levels of management units, the first-level super capacitor management unit is connected with the high-voltage box unit and the super capacitor unit, and the second-level super capacitor management unit is arranged in the high-voltage box unit. And the third-stage super capacitor management unit is respectively connected with the energy management system unit, the high-voltage box unit and the current conversion unit. The method can realize safe and efficient management of the energy of the super capacitor, and is suitable for popularization and application in the fields of energy storage and the like.

The invention discloses a preparation method of bryophyte-based full-microporous carbon. The preparation method comprises the following steps: 1) simply chopping bryophyte and then naturally airing the bryophyte; 2) dipping the naturally aired bryophyte in a potassium hydroxide solution, then fishing out and naturally airing again; (3) firing the soaked and naturally aired bryophyte in a protective atmosphere to obtain primary charcoal; and 4) washing the primary charcoal with a hydrochloric acid solution and water until the primary charcoal is neutral to obtain activated carbon with the micropore content of 100%, namely the bryophyte-based full-micropore charcoal. According to the preparation method, the bryophyte with high water content serves as a carbon source, the carbon material with the micropore content being 100% is obtained through firing, the produced carbon has the advantages of being large in specific surface area, high in pore volume, high in nitrogen and oxygen doping level and the like, and when the carbon is applied to the capacitive energy storage material, high specific capacitance can be kept under the high-rate charging and discharging conditions. The method provided by the invention has the advantages of stable raw material supply, low raw material and production cost, simplicity in operation and easiness in large-scale production when being used for producing the carbon material.

The invention discloses an energy management system of a marine lifeboat collecting and releasing device. The energy management system comprises a four-quadrant frequency converter, a super capacitor energy storage system and an energy path control module, the four-quadrant frequency converter is connected with a ship alternating current power supply and a servo motor; the direct current bus is connected with the braking unit, the braking resistor and the DC / DC bidirectional converter; the super capacitor is connected with the direct current bus through the DC / DC bidirectional converter; the energy path control module dynamically controls an energy path by monitoring the voltage and the charge state of the super capacitor in real time; through cooperative control of the four-quadrant frequency converter and the super-capacitor energy storage system, a three-level redundancy mechanism of energy storage buffering, power grid feedback and resistance energy consumption is formed, multi-level efficient utilization of regenerated energy is achieved, the energy utilization rate is increased, the problem that an existing device cannot achieve emergency recovery under the sudden power loss working condition is solved, and the energy utilization rate is increased. And the reliability and the environmental protection property of the system are obviously improved.

A resonant circuit arrangement according to the invention for a traction converter of a rail vehicle, wherein the traction converter has at least one grid-side first converter, at least one load-side second converter, a DC link connecting the at least one first converter and the at least one second converter with a first and a second voltage potential, and at least one DC link capacitor arranged in the DC link, is characterized in that the resonant circuit arrangement arranged in the DC link and connected in parallel to the at least one DC link capacitor comprises at least one switching arrangement including at least one switching unit and at least one inductor, wherein each switching unit comprises two terminals, at least two controllable power semiconductor switches and at least one switching unit capacitor, and is configureddepending on the switching positions of the power semiconductor switches, providing at least two different voltages at the terminals, and wherein the at least one inductor is connected in series with at least one switching unit, comprising at least one capacitive energy storage device, wherein the at least one capacitive energy storage device is connected in series with the at least one switching arrangement, and a control device, wherein the control device is configured to control at least the power semiconductor switches of the at least one switching unit.

The invention provides a multi-stage soft start charging circuit and device for a high-capacity capacitor and electronic equipment. The circuit comprises a multi-stage timing sub-circuit, a multi-stage soft start circuit and the high-capacity capacitor, the multi-stage timing sub-circuit comprises n timing sub-circuits which are connected in parallel; the multi-stage soft driver circuit comprises n soft driver circuits which are connected in series; a first port of the ith timing sub-circuit is connected with a positive electrode of a power supply, a second port of the ith timing sub-circuit is connected with a ground wire, and a third port of the ith timing sub-circuit is connected with a first port of the ith soft driver circuit; one end of the high-capacity capacitor is connected with the positive electrode of the power supply, the other end of the high-capacity capacitor is connected with the second port of the nth soft driver circuit, the third port of the jth soft driver circuit is connected with the second port of the (j-1) th soft driver circuit, and the third port of the first soft driver circuit is connected with a ground wire. The circuit provided by the invention can be used for quickly charging the high-capacity capacitor on the premise of limiting the impact current and not losing the energy storage and filtering effects of the capacitor.

The invention discloses an electromagnetic transient equivalent modeling method of a semi-full hybrid MMC-SESS, and relates to the technical field of high-voltage flexible direct-current power transmission. The method comprises the following steps: obtaining a topological structure and a control strategy of the semi-full hybrid super capacitor energy storage type modular multilevel converter; according to the topology of the half-bridge sub-module and the full-bridge sub-module, basic electrical elements are determined, an equivalent model is established, and adjoint circuits of the half-bridge sub-module and the full-bridge sub-module are obtained; equivalent circuits of the half-bridge sub-modules and the full-bridge sub-modules are obtained through a nested fast solution method, and an equivalent model of the half-full hybrid super-capacitor energy storage type modular multilevel converter is obtained through series connection and superposition according to a half-full proportion; and performing simulation verification on the equivalent model. The method is simple and easy to implement, the number of the sub-modules and the voltage level can be expanded according to requirements, and compared with a detailed model, the simulation speed can be remarkably increased, the external and internal characteristics of the semi-full hybrid MMC-SESS can be accurately simulated, and system-level simulation analysis and control design of the semi-full hybrid MMC-SESS are supported.

The invention discloses a low-power-consumption control system and method based on multi-mode micro-energy collection and intelligent energy management. The low-power-consumption control system comprises a plurality of independent energy input interface circuits, a super-capacitor energy storage module and an energy processing and battery charging management module. Each input interface circuit adaptively boosts or rectifies specific energy sources (such as solar energy, wind energy, vibration energy, heat energy and the like), and charges a super capacitor after being isolated by a diode. After the energy storage voltage of the super capacitor reaches a threshold value, the processing circuit driven by the BUCK-BOOST chip converts the energy storage voltage into stable voltage and outputs the stable voltage to the battery charging chip, so that efficient energy storage is realized. The system is monitored by a low-power-consumption single-chip microcomputer, energy consumption is reduced through a sleep-wake-up mechanism, and meanwhile the system can be expanded to be a control core of a sensor or a wireless module.

The invention relates to the field of application of dielectric energy storage materials, and discloses application of a polyimide film in a dielectric energy storage material. The polyimide is prepared by copolymerizing bis [4-(4-aminophenoxy) phenyl] sulfone and 4, 4 '-(hexafluoroisopropene) diphthalic anhydride, or copolymerizing bis [4-(3-aminophenoxy) phenyl] sulfone and 4, 4'-(hexafluoroisopropene) diphthalic anhydride, or copolymerizing bis [4-(3-aminophenoxy) phenyl] sulfone and 4, 4 '-(hexafluoroisopropene) diphthalic anhydride. Ether bonds are introduced to two sides of diphenyl sulfone to destroy a continuous conjugated structure between an imide ring and diphenyl sulfone, hexafluoroisopropylene with high electronegativity is introduced into a dianhydride unit, and high-temperature insulativity is improved through interaction of the three. When the prepared polyimide film is used as a dielectric medium energy storage material, the high-temperature insulation property is improved while the heat resistance and the relatively high dielectric constant are maintained, so that the energy storage property of a capacitor is improved. The discharge energy density of 7.25 J / cm < 3 > and 4.79 J / cm < 3 > is realized at 200 DEG C and 250 DEG C respectively, and the efficiency is greater than 90%.