199results about How to "Reduce charge and discharge times" patented technology

The invention discloses an energy optimizing dispatching method of a home hybrid power supply system in a real-time power price environment. The energy optimizing dispatching method comprises the steps of establishing a flexible load working model according to a linear inequality constraint condition, obtaining electric energy matching between DG (distributed generation) and a load by use of a genetic algorithm (GA), performing automatic optimization by use of the information of the DG and the RTP (Real Time Price) and arranging the flexible load to operate at a lowest-price moment, developing a charge/discharge policy of an energy storage device to realize the energy re-planning of the DG, thereby satisfying the balance between supply and demand of the DG and the load, and finally, making up the difference between supply and demand in such a manner of supplying power to a storage battery or the load from a large power grid and reducing the power purchase cost to an utmost extent. The energy optimizing dispatching method of the home hybrid power supply system in the real-time power price environment provides detailed algorithm description for an actual smart home user as a test object; besides, the effectiveness of the developed policy in improving the utilization rate of the electric energy of the DG and the economic benefit of the user is proven through a series of experiments.

The invention provides a composite energy storage system, which consists of a supercapacitor and a storage battery, wherein the composite energy storage formed by the supercapacitor and the storage battery has both power type and energy type characteristics; through the combined use, the charging and discharging times of the storage battery can be effectively reduced; in addition, the utilization rate of the energy storage system can be improved. According to an energy management and control optimization method matched with the composite energy storage, the total power of the composite energy storage is distributed through a low-pass filter, so that the supercapacitor and the storage battery respectively share a high-frequency component and a low-frequency component in the fluctuating power; through the two-way DC/DC1 converter constant-power control on the storage battery, the two-way DC/DC2 converter constant bus voltage control on the supercapacitor, and control strategies of the two-way DC/AC converter, the network loss of a power distribution network is reduced; the utilization efficiency of new energy sources is improved; the power fluctuation during micro power grid interconnection is effectively inhibited; the electric energy quality of a region electric network is improved; in an offline state, the stability of the voltage and the frequency of a micro power grid system can be ensured; the power balance generated during grid connection/off-grid switching is fast compensated.

The invention discloses a power control method of an energy storage system, which is used for secondary recycling of power batteries. The power control method comprises the following steps of: sequentially classifying power battery packs into a priority discharging battery pack, an effective working battery pack and a priority charging battery pack according to charged state values of the secondarily-recycled power battery packs from large to small; charging the priority charging battery pack and then the effective working battery pack during charging; and discharging the priority discharging battery pack and then the effective working battery pack during discharging. By the power control method, the battery packs are sequenced and classified in terms of priorities according to the charged states of all power battery packs, power is allocated to the battery pack with a high charging/discharging level by referring to a power given value, thus, charging and discharging frequencies of each power pack are reduced, power balance of the plurality of battery packs running in a parallel-connection manner is achieved, a part of battery packs are prevented from frequently running in charging and discharging ways, the service life of the energy storage system is comprehensively prolonged, and the running stability and safety of the system can be further improved.

The invention discloses an active optimal control system of a wind and light storage combined power generation system and a method. The active optimal control system comprises a wind and light storage combined power generation system control central station and wind and light storage combined power generation system control substations. The method includes drawing out a power output curve of a wind power station, a photovoltaic power station and an energy storage power station according a planed power output curve and by considering correlated conditions of the wind power station, the photovoltaic power station and the energy storage power station, and distributing correlated plans to all control substations; and working out generation plans of corresponding control units according to power output plans distributed by all control substations, and executing power output plans distributed by control substations finally by the control units. By the aid of the control process, the wind and light storage combined power generation system can be guaranteed to operate according to the force output curve, charge-and-discharge times of storage batteries can be reduced, low current charge-and-discharge of the energy storage power station is avoided, the short-time overload capability of the energy storage power station is fully utilized, and the service life of the energy storage power station is prolonged.

The invention discloses a control method of a hybrid energy storage system for stabilizing the power fluctuation of an intermittent type power source, comprising the following steps of acquiring the real-time power of the intermittent type power source, the synthetic output power of power and stored energy, the SOC (State of Charge) of a battery and the voltage of a supercapacitor by a data acquisition module, and sending data to a stabilizing and control module; processing the data in the stabilizing and control module and judging whether the power output is needed or not according to a fluctuation power; and in the case of needing power output, outputting a control power instruction and a charge/discharge instruction, and carrying out output by the energy storage system according to the control instruction, wherein electric energy output by the energy storage system passes through PCS (Power Converters), is synthesized with the output of the intermittent type power source through a circuit breaker respectively and merges into a power grid through a transformer. By the adoption of the control method of the hybrid energy storage system for stabilizing the power fluctuation of the intermittent type power source, the defects that when the power fluctuation of the intermittent type power source is stabilized by the prior art, as the energy storage system mainly adopts a single energy storage medium, the ability of stabilizing the power fluctuation of the intermittent type power source is weak and the service life of an energy storage element is shorter are overcome; and therefore, the practicability and the economical efficiency are enhanced.

The invention discloses a correcting method of wind power generation system power real-time prediction and belongs to the technical field of wind power generation system control. BP neural network prediction errors and training samples are corrected in real time and energy storage batteries are disposed in a wind power plant so as to increase wind power prediction accuracy. Capacity of the energy storage batteries is selected according to the relation of prediction results and errors. By the method, prediction precision is increased, wind power prediction errors are lowered with the energy storage batteries with the capacity low to the greatest extent, battery capacity is lowered, charging and discharging times of the batteries are reduced, service lives of the batteries are prolonged, and investment cost of a wind power generation system is reduced.

The invention relates to a microgrid energy storage power station program control method based on economical evaluation, comprising predicting the microgrid load data of N days, wind power output power and photovoltaic output power, and characterized by calculating the energy storage system capacity meeting load requirements based on obtained data; utilizing an improved empirical mode decomposition algorithm to decompose the energy storage system capacity to obtain n IMF components, wherein k is respectively 1-n, the sum of 1-(k-1) IMF components is used as a cell capacity, and the sum of k-n IMF components is used as a super capacitor capacity; substituting the power and capacity of a cell and a capacitor into a microgrid energy storage power station program model, determining whether meeting constrained conditions, and calculating a corresponding objective function value; and utilizing a genetic algorithm to search optimization for the model, obtaining a k value meeting the constrained conditions and minimizing an objective function, and determining the optimal capacity configuration and annual mean least cost of an energy storage system.

The invention discloses a multi-component composite energy storage system grid combination control method based on power prediction, comprising steps of calculating difference value PV-L of the photovoltaic output power prediction value PV and the load power prediction value PL according to the photovoltaic output power prediction value PV and the load power prediction value PL and, utilizing a wavelet packet composition method to map PV-L to the subspaces of m wavelet packets to obtain signals with different frequencies, using the frequency signals which are close to the responding frequency of a storage battery in the frequency signals as low frequency signals P low which are complimented by the storage battery and using the rest of the frequency signals and the frequency signals which are not absorbed by the battery as high frequency signals P high which are complimented by a super capacitor, using an external loop control method and an inner loop current control method to output the real power of the storage battery and the super capacitor and control the charging and discharging power of the storage battery and the super capacitor by utilizing the state of charges of the super capacitor and the current, the state of charge and maximum charge-discharge power of the storage battery according to the real condition. The advantages of the invention are safe, stable, and economic in operation. Furthermore, the times of charging and discharging of the storage battery are reduced.

The invention discloses a hybrid energy storage control method for stabilizing intermittent power supply power fluctuation. According to the method, a super capacitor with large power density and high dynamic response speed is adopted as system buffer stored energy for preferentially stabilizing the power fluctuation, and the voltage of the super capacitor is prevented from being out of limit by adjusting the power of a storage battery set. The storage battery set is divided into a charge set and a discharge set which are independent and are controlled respectively, and the circulating charge and discharge frequency of the storage battery set is reduced to the maximum extent. Based on the mutual adjustment rule of the charge set and the discharge set of the storage battery set of a charge state, the storage battery set is prevented from being deeply charged or discharged, and the service life of the storage battery set is prolonged.

The invention aims at the characteristics and the existing problems of an existing electric automobile adopting an energy storage structure that a dynamical battery is connected with a super capacitor in parallel and designs an electric automobile dynamical system with a precharge circuit. With the adoption of the electric automobile dynamical system, optimized management can be carried out on vehicle electric energy. The electric automobile dynamical system comprises the dynamical battery and the super capacitor and is characterized in that the super capacitor is connected with a main motor system in parallel; the dynamical battery is connected with the main motor system in parallel after being connected with a contactor K1 in series; an auxiliary motor system is connected with the dynamical battery in parallel; the auxiliary motor system is connected with the main motor system in parallel after being connected with a charge resistor and a contactor K2; and an engine is connected to the auxiliary motor system. The invention also provides a corresponding control strategy so as to achieve the purposes of meeting the demand of the driving conditions, furthest utilizing the energy stored by the super capacitor, making the dynamical battery to avoid large current and deep discharge, improving system efficiency and ensuring the service life of the battery and the super capacitor.

The invention relates to a worn-out power battery secondary use screening method. The whole of a battery pack is charged and discharged, through data recorded by the BMS in a test, in the discharging process, 2 to 4 SOC points with the SOC value ranging from 20% to 90% are selected, and voltage of each monomer in series is read; the batteries which are deviated from most of the batteries and overpass 5% in the voltage value are determined to be batteries of problems, and the residual batteries are initially identified as batteries in healthy states; internal resistance of each battery in the residual batteries is measured, a second screening is conducted through the inner resistance value, battery cells which deviate from normal resistance of the most battery cells by 20% are eliminated and the screening is finished; 10 batteries are randomly selected from the residual batteries to be charged and discharged, the average capacity of the 10 batteries is deemed as the capacity value of all the batteries in the healthy states. Compared with the detection method of the prior art, times of charging and discharging are greatly reduced, time needed by the new screening method is about 1/10 less than the traditional method, quantity demand for charging and discharging devices is greatly reduced, and equipment investment is reduced.

The invention provides a pitch regulating device and a wind driven generator. The pitch regulating device comprises a servo motor driver, a pitch regulating motor and a super capacitor, wherein the servo motor driver comprises a main electric loop, a controller and a charging and discharging circuit; the main electric loop is connected with the pitch regulating motor for providing electric energy for the pitch regulating motor; the charging and discharging circuit is connected with the super capacitor and is a pulse width modulation (PWM) circuit; and the controller is used for controlling the pitch regulating motor to carry out pitch regulating operation according to the pitch regulating parameter. In the embodiment of the invention, the servo motor driver and the super capacitor are charged and discharged by the charging and discharging circuit of the PWM circuit, thereby lowering the influence on the super capacitor from the voltage fluctuation of the main electric loop, reducing the charging and discharging times of the super capacitor, prolonging the service life of the super capacitor, effectively avoiding the situation that the super capacitor frequently generates overvoltage and improving the working environment of the super capacitor.

The invention discloses a hybrid energy storage power station capacity determination method for stabilizing wind power fluctuations. The method comprises the steps that a hybrid energy storage power station charge-discharge process model is built with the goal of reducing storage battery charge-discharge frequency or reducing capacitance; a hybrid energy storage power station capacity optimized objective function is built with the goal of minimizing the sum of the building cost and the running cost of a hybrid energy storage power station; on the condition that the requirement of the hybrid energy storage power station charge-discharge process model is met, the PSO algorithm is adopted for solution and calculation of the hybrid energy storage power station capacity optimized objective function, and the optimal capacitance value of the hybrid energy storage power station is determined. According to the hybrid energy storage power station capacity determination method for stabilizing the wind power fluctuations, the hybrid energy storage power station is built based on a typical power type energy storage VRLA and an energy type energy storage UC, the charge-discharge process model with the complementary advantages is built by means of the features of the typical power type energy storage VRLA and the energy type energy storage UC, and coordinating and organic running of media of a hybrid energy storage system can be achieved; a capacity planning model is built with the goal of minimizing the running cost and the building cost of the energy storage power station, and the capacity is optimized.

The invention provides a power supply device, a storage system and a power supply method. A super capacitor is controlled for supplying power to a main control panel of the storage system through a control circuit under the condition that a main power supply of the storage system is in power failure, in addition, when the discharging of the super capacitor reaches the preset duration, batteries are controlled for supplying power to the main control panel of the storage system, the key data storage completion of the storage system can be ensured after the main power supply of the storage system is in the power failure, in addition, the battery discharging after the main power supply of the storage system is in the power failure is possibly avoided, and the charging times of the batteries is reduced, so the service lives of the batteries are effectively prolonged.

The invention discloses an extended-range electric vehicle energy distribution method based on a dual-voltage composite energy storage system. A diode is arranged between a storage battery and a super capacitor; the conduction direction of the diode enables that energy only can flow from the storage battery to the super capacitor; and by detecting the operation state of the whole vehicle, the operation state of an engine, the operation state of an APU (auxiliary power unit) system, the voltage of the storage battery and the voltage of the super capacitor, the energy flow of the engine, the APU system, the storage battery and the super capacitor is controlled, and the energy distribution of the whole vehicle is determined.

The invention relates to an electronic cigarette and a power module used for the electronic cigarette. The power module comprises a wireless charging unit, a power pack unit and a power management unit. The wireless charging unit is used for wirelessly receiving a power signal provided by an external wireless charging base and converting the power signal into a charging signal provided for the battery pack unit to carry out charging, and the power management unit is used for controlling the battery pack unit to carry out charging or discharging. The battery pack unit comprises a first battery subunit and a second battery subunit, a battery management unit is used for comparing the electric quantity of the first battery subunit and the electric quantity of the second battery subunit, and the charging and discharging sequence is controlled according to the electric quantity of the first battery subunit and the electric quantity of the second battery subunit. The electronic cigarette has the advantages of being long in service life, low in using cost, convenient to operate and the like.

The invention provides a photovoltaic power generation system. The photovoltaic power generation system comprises at least one first photovoltaic module, a photovoltaic inverter, a first bidirectionalDC-DC (direct-current-direct current) converter and at least one first energy storage unit and also comprises at least one second photovoltaic module or at least one energy storage unit; the photovoltaic inverter comprises a DC-DC converter and a DC-AC (alternating current) inverter, the DC-DC converter is electrically connected with the at least one first photovoltaic module, and the DC-DC converter and the DC-AC inverter are connected through a DC bus; the first bidirectional DC-DC converter comprises at least three ports, the first port is electrically connected with the DC bus, the secondport is electrically connected with a port of the at least one first energy storage unit, and the third port is electrically connected with an output port of the at least one second photovoltaic module or a port of the at least one energy storage unit. The photovoltaic power generation system can be configured with photovoltaic arrays and an energy storage device flexibly to cope with power utilization peaks and valleys.

The invention discloses a distributed direct-current micro-grid composite energy storage control method. The method comprises super capacitor control and storage battery control. The super capacitor control comprises average voltage control and end voltage consistency control. The average voltage control can make an average bus voltage at a direct current composite energy storage outlet reach a rated voltage so as to enhance an overall voltage level of a system. The end voltage consistency control can maintain end voltages of a super capacitor to be the same and realize equalization output. The storage battery control comprises super capacitor end voltage control and state-of-charge (SoC) control. The super capacitor end voltage control can maintain a super capacitor end voltage level. The SoC control makes output power of a storage battery distributed according to SoC and a single storage battery is prevented from being over-charged and over-discharged. By using the method of the invention, a distributed control problem of composite energy storage is solved. And the method is suitable for a direct-current micro-grid system which is connected in parallel to a multi-composite energy storage system (HESS).

The invention relates to a control method and controller of hybrid energy storage, belonging to the field of a wind and light supplementary power generation technology. The technical scheme is as follows: current and voltage signals of a super capacitor (4), a storage battery (9) and a load (7) are collected by a main controller (1) through a voltage and current sampling circuit (2) of the super capacitor, the voltage and current sampling circuit (3) of the storage battery and the voltage and current sampling circuit (6) of the load, respectively; after the current and voltage signals are processed by the main controller, a bidirectional DC/DC (Direct Current/Direct Current) converter (8) is controlled through a driving circuit (5), so that the power generation work and the energy storage work of the super capacitor, the storage battery and the load are at the maximum power point. The control method and the controller of the hybrid energy storage, provided by the invention, have the advantages that: the storage battery is at an optimized charging/discharging working state all the time and is hardly influenced by external factors, working conditions of the storage battery are improved, and the charging/discharging time of the storage battery is reduced, so that the service life of the storage battery is prolonged, and the stability and the whole conversion efficiency of a wind and light supplementary power generation and energy storage system are improved.

The invention discloses a method for controlling a battery status based on a domestic Fei Teng processor. The method is used for obtaining in real time various information of an intelligent battery and controlling a charge and discharging status of the battery. The technical scheme is that a battery status control system of Smart Battery formed by the Smart Battery, a Fei Teng 1000A processor, battery status control software and a power supply management application is built first, battery status information is obtained by the battery status control software according to the cycle T by accessing a register related to LTC 4100, the battery status information is wrote in a proc file system, the power supply management application is provided with upper limit threshold value of the charge quantity of electricity and lower limit threshold value of discharge quantity of electricity, structured battery status information is obtained by the power supply management application from the Proc file system according to the cycle T, and the charge and discharge of the battery of the Smart Battery is controlled. According to the method, the control of the battery status of the Smart Battery based on a Fei Teng processor platform can be implemented at low cost, and the compatibility, the adaptability, the flexibility and the extendibility are good.

The invention discloses a power optimization scheduling-based microgrid energy storage system state consistency control method, which belongs to the technical field of control of the microgrid energystorage system. The method adopts time-of-use price, new energy prediction output and energy storage unit battery pack state of energy SOE to determine an energy storage unit operation strategy on thebasis of considering energy storage charge and discharge efficiency and ensuring system active power balance, and considers an energy storage unit battery pack state of energy SOE imbalance problem and time-varying energy storage unit power charge and discharge bearing capability SOP, and a microgrid energy storage system power balance model is built; and besides, through a consistency protocol,energy storage units SOH and SOE are ensured to be consistent, the application performance of the energy storage unit in the energy storage system is improved, the overall charge and discharge times of the energy storage system is effectively reduced, and the service life is improved.

The embodiment of the present invention discloses a power supply control circuit and method of a mobile terminal and a power supply management module. The power supply control circuit comprises an external power supply input end, a battery, a voltage conversion module, a first switch, a mainboard, the power supply management module, a voltage comparison module, a switch control module and a voltage stabilization capacitor. The voltage comparison module and the power supply management module are connected with the switch control module, and the switch control module is connected with the first switch. The switch control module is used to control the first switch to connect an external power supply circuit if the voltage comparison module determines that an external power supply inputted by the external power supply input end satisfies a threshold condition, and the power supply management module outputs an instruction for connecting the external power supply circuit, so that the battery does not supply power, the situation that the battery is charged while discharging can be reduced, the charge and discharge times of the battery can be reduced, and the service life of the battery is prolonged. Otherwise, the switch control module is used to control the first switch to connect a battery power supply circuit, thereby guaranteeing the power supply continuity to the mobile terminal.