An energy storage experimental device

Abstract

The present invention relates to an energy storage experimental device, belonging to the technical field of energy storage. The present invention collects the first information of the energy storage module and the second information of the experimental module through the management module to generate a first control signal and a second control information. The energy storage module is controlled by the first control information to convert the first energy storage into the second energy storage, and the experimental module is controlled by the second control information to convert the second energy storage into the third energy storage. The battery is charged by the third energy storage, and the status information of the battery is displayed, so that the energy storage experiment and simulation of the energy storage device can be effectively carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage, and particularly to an energy storage experimental device. Background Art

[0002] At present, compared with traditional fossil fuels such as coal and oil, energy sources such as wind energy, solar energy, and water energy have the characteristics of less pollution, large reserves, and renewability. Increasing the development of these clean energy sources and realizing their large-scale utilization is of great significance for alleviating the serious environmental pollution and resource depletion problems in the world today, and has become a key focus in the current power industry.

[0003] However, renewable clean energy sources such as wind energy, solar energy, and water energy all have the characteristic of volatility. Among them, the short-term fluctuations of wind energy and solar energy are relatively large, while the short-term fluctuations of water energy are relatively small, and the seasonal fluctuations are relatively large. This difference in fluctuations makes there be a certain complementarity among wind power generation, photovoltaic power generation, and hydropower generation. However, the output power of the multi-source complementary microgrid composed of wind, light, and water is still unstable, bringing new challenges to the safe and stable operation of the large power grid.

[0004] In order to improve the stability of the output power of the multi-source complementary microgrid, it is necessary to configure energy storage devices in some specific places to complete energy storage experiments and simulations. However, the multi-source energy storage devices in the prior art cannot meet the requirements of energy storage experiments and simulations. Summary of the Invention

[0005] The present invention provides an energy storage experimental device to solve at least one of the problems in the above background art.

[0006] To achieve the above object, an embodiment of the present invention provides an energy storage experimental device, including:

[0007] A management module, configured to collect first information and second information, and generate a first control signal and a second control signal based on the first information and the second information;

[0008] An energy storage module, configured to generate first information, transform an input current according to the first control signal to obtain a control current, operate an energy storage device through the control current to obtain a first energy storage, and convert the first energy storage into a second energy storage;

[0009] An experimental module, configured to generate second information, convert the second energy storage according to the second control signal to obtain a third energy storage, charge a storage battery through the third energy storage, and display the status information of the storage battery.

[0010] Further, the energy storage module includes:

[0011] A first current guiding unit, configured to introduce three-phase alternating current from the power grid to obtain an input current;

[0012] The first rectification unit is used to convert the input current into the first direct current;

[0013] The first inversion unit is used to convert the first direct current into the first alternating current with a preset frequency and / or amplitude to obtain a control current;

[0014] The energy storage unit is used to operate the energy storage device through the control current to obtain the first energy storage;

[0015] The energy storage release unit is used to convert the first energy storage into the second energy storage through the energy storage device;

[0016] Wherein, the first energy storage is mechanical energy and the second energy storage is electrical energy.

[0017] Further, the experimental module includes:

[0018] The second drainage unit is used to introduce three-phase alternating current from the power grid and / or introduce the second energy storage;

[0019] The second rectification unit is used to convert the three-phase alternating current and / or the second energy storage into the second direct current to obtain the third energy storage;

[0020] The battery energy storage unit is used to charge the battery according to a preset charging mode through the third energy storage and display the state information of the battery; wherein, the preset charging mode includes at least one of a constant voltage charging mode, a constant current charging mode, and a stepped charging mode; the state information of the battery includes at least one of the voltage state, charging state, and discharging state of the battery;

[0021] The pulsed capacitor energy storage unit is used to be charged through the battery energy storage unit, generate a first pulse, and display at least one of the series voltage state, parallel voltage state, charging state, and discharging state of the pulsed capacitor energy storage unit;

[0022] The pulsed capacitor charging unit is used to control the width of the first pulse and perform voltage regulation through a reserved open interface to generate a second pulse; wherein, the voltage of the second pulse is greater than the voltage of the first pulse;

[0023] The discharging unit, the discharging unit includes:

[0024] The pulse forming sub-unit is used to process the waveform of the second pulse and output a preset pulse waveform;

[0025] The load simulation sub-unit is used to perform one of the parallel discharging, synchronous discharging, and time-sequential discharging of at least two modules;

[0026] The load and measurement unit is used to record the waveform of the preset pulse waveform when the capture accuracy of the preset pulse waveform is greater than or equal to a preset value, and calculate the load according to the captured preset pulse waveform.

[0027] Further, the battery energy storage unit includes at least one lithium iron phosphate battery, and a voltage stabilizing tube is connected in parallel to each lithium iron phosphate battery. At least one lithium iron phosphate battery has a structure of 27 series-connected and 8 parallel-connected cells, and is charged through a stepped charging mode.

[0028] Further, the pulsed capacitor energy storage unit is a Marx generator circuit, including at least two capacitors and at least two spark gap switches;

[0029] During charging, the capacitors are charged in parallel;

[0030] During discharging, the spark gap switches are broken down to generate a first pulse by capacitor series connection to charge the pulsed capacitor charging unit;

[0031] And / or, the pulsed capacitor energy storage unit charges the pulsed capacitor charging unit through at least two charging levels;

[0032] Among them, the number of capacitors connected in series corresponding to each charging level is different.

[0033] Further, the pulsed capacitor charging unit includes a DC-DC converter circuit. The primary side of the DC-DC converter circuit includes a full-bridge inverter circuit of IGBT, and the secondary side of the DC-DC converter circuit includes a full-bridge uncontrolled rectifier circuit;

[0034] And / or, the pulsed capacitor charging unit is provided with a dead zone, and the duty cycle of each switch in the pulsed capacitor charging unit is less than or equal to 50%;

[0035] And / or, the charging mode of the pulsed capacitor charging unit includes a constant current mode and a constant voltage mode, and the pulsed capacitor charging unit is controlled in parallel through a voltage loop and a current loop.

[0036] Further, the energy storage device includes a polyphase induction motor and a flywheel body, and the energy storage release unit includes a polyphase synchronous motor;

[0037] The energy storage unit is specifically configured to control the operation of the polyphase induction motor to obtain mechanical energy by controlling the current for the flywheel body;

[0038] The energy storage release unit is specifically configured to convert mechanical energy into electrical energy through the polyphase synchronous motor, and input the electrical energy into a programmable adjustable load box and an experimental module.

[0039] Further, the first information includes the first energy storage power information and the motor speed information, and the second information includes the load power information.

[0040] Further, the first energy storage power information, the motor speed information, and the load power information are input into a pre-trained neural network model to obtain a first control information and a second control signal;

[0041] The first current-draining unit adjusts the input current according to the first control information, and the second current-draining unit adjusts the three-phase alternating current introduced from the power grid and the second energy storage introduced from the energy storage module according to the second control signal.

[0042] Furthermore, the first inverter unit includes an inverter, a radiator, an optical fiber drive board, a control board, a current and voltage acquisition board, and a key and display board;

[0043] Among them, the inverter is a two-level, multi-phase H-bridge inverter;

[0044] And / or, the control forms of the current include current hysteresis control and slip hysteresis control;

[0045] And / or, at least one set of symmetric counterweight blocks are arranged on the outer edge of the flywheel body;

[0046] And / or, the multi-phase induction motor includes at least one kind of winding of a 20-slot stator, a 30-slot stator, and a 40-slot stator;

[0047] And / or, the excitation modes of the multi-phase synchronous motor include at least one of self-excitation and forced excitation by other excitation.

[0048] From the above technical content, it can be seen that the present invention has the following beneficial effects:

[0049] The present invention collects the first information of the energy storage module and the second information of the experimental module through the management module to generate the first control signal and the second control information, controls the energy storage module to convert the first energy storage into the second energy storage through the first control information, controls the experimental module to convert the second energy storage into the third energy storage through the second control information, charges the storage battery through the third energy storage, and displays the state information of the storage battery, so that the energy storage experiment and simulation of the energy storage device can be effectively carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0051] <*This is a block diagram of the energy storage experiment device provided by the embodiment of the present invention; Figure 1

[0052] Figure 2 This is a working principle diagram of the energy storage experiment device provided by the embodiment of the present invention;

[0053] Figure 3 This is another working principle diagram of the energy storage experiment device provided by the embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] In order to more clearly understand the above objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. The specific embodiments described herein are merely used to explain the present invention, rather than limiting the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0055] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0056] As Figure 1 shown, an embodiment of the present invention provides an energy storage experiment device, including:

[0057] A management module 100, configured to collect first information and second information, and generate a first control signal and a second control signal based on the first information and the second information.

[0058] An energy storage module 200, configured to generate first information, transform an input current according to the first control signal to obtain a control current, operate an energy storage device through the control current to obtain a first energy storage, and convert the first energy storage into a second energy storage.

[0059] An experiment module 300, configured to generate second information, convert the second energy storage according to the second control signal to obtain a third energy storage, charge a storage battery through the third energy storage, and display the status information of the storage battery.

[0060] In this embodiment, the management module 100 includes a management unit and a communication unit. The management unit collects the first information and the second information through a 485 bus, and respectively generates a first control information and a second control information according to the first information and the second information, and controls the energy storage module 200 and the experiment module 300 through the 485 bus. The management module 100 communicates with the energy storage module 200 and the experiment module 300 through the communication unit.

[0061] The present invention collects the first information of the energy storage module and the second information of the experiment module through the management module to generate a first control signal and a second control information, controls the energy storage module to convert the first energy storage into a second energy storage through the first control information, controls the experiment module to convert the second energy storage into a third energy storage through the second control information, charges the storage battery through the third energy storage, and displays the status information of the storage battery, so as to effectively perform energy storage experiments and simulations on the energy storage device.

[0062] Furthermore, as Figure 1 shown, the energy storage module 200 includes:

[0063] A first current guiding unit 210, configured to introduce three-phase alternating current from the power grid to obtain an input current.

[0064] A first rectifying unit 220, configured to convert the input current into a first direct current.

[0065] In this embodiment, the first rectifying unit 220 includes a three-phase full-bridge rectifying device provided with a phase-shifting transformer and a secondary transformer.

[0066] A first inverting unit 230, configured to convert the first direct current into a first alternating current with a preset frequency and / or amplitude to obtain a control current.

[0067] In this embodiment, the first inverting unit 230 is an inverting circuit formed by five full H-bridges connected in parallel.

[0068] An energy storage unit 240, configured to operate an energy storage device through the control current to obtain a first energy storage.

[0069] An energy storage release unit 250, configured to convert the first energy storage into a second energy storage through the energy storage device; wherein, the first energy storage is mechanical energy and the second energy storage is electrical energy.

[0070] Furthermore, as Figure 1 shown, the experimental module 300 includes:

[0071] A second current guiding unit 310, configured to introduce three-phase alternating current from the power grid and / or introduce the second energy storage.

[0072] A second rectifying unit 320, configured to convert the three-phase alternating current and / or the second energy storage into a second direct current to obtain a third energy storage.

[0073] In this embodiment, the second rectifying unit 320 includes a three-phase full-bridge rectifying device provided with a phase-shifting transformer and a secondary transformer.

[0074] A battery energy storage unit 330, configured to charge a battery according to a preset charging mode through the third energy storage and display the status information of the battery; wherein, the preset charging mode includes at least one of a constant voltage charging mode, a constant current charging mode, and a stepped charging mode; the status information of the battery includes at least one of the voltage status, charging status, and discharging status of the battery.

[0075] A pulse capacitor energy storage unit 340, configured to be charged through the battery energy storage unit 330, generate a first pulse, and display at least one of the series voltage status, parallel voltage status, charging status, and discharging status of the pulse capacitor energy storage unit 340.

[0076] A pulse capacitor charging unit 350, which is used to control the first pulse width through a reserved open interface, perform voltage regulation, and generate a second pulse; wherein, the voltage of the second pulse is greater than the voltage of the first pulse.

[0077] A discharging unit 360, the discharging unit 360 includes:

[0078] A pulse forming sub-unit 361, which is used to process the waveform of the second pulse and output a preset pulse waveform.

[0079] A load simulation sub-unit 362, which is used to perform one of parallel discharging, synchronous discharging, and time-division sequential discharging of at least two modules.

[0080] A load and measurement unit 370, which is used to perform waveform recording on the preset pulse waveform when the capture accuracy of the preset pulse waveform is greater than or equal to a preset value, and calculate the load according to the captured preset pulse waveform.

[0081] In addition, the energy storage module 200 and the experimental module 300 are also provided with a centralized monitoring system. The centralized monitoring system uses CVI programming, centrally controls each subordinate sub-device through a 485 bus, and has the functions of monitoring main information and control.

[0082] Furthermore, the battery energy storage unit 330 includes at least one lithium iron phosphate battery. A voltage stabilizing diode is connected in parallel to each lithium iron phosphate battery. At least one lithium iron phosphate battery has a structure of 27 strings in series and 8 strings in parallel, and is charged through a stepped charging mode.

[0083] In this embodiment, the battery is connected to the mains power supply, its charging unit operates independently, the battery is remotely controllable, a BMS system and a 485 interface are provided, the voltage of the voltage stabilizing diode is set to the rated voltage of the battery to protect the battery, and the communication method can adopt CAN, RS485, Ethernet, etc.

[0084] Furthermore, the pulse capacitor energy storage unit 340 is a Marx generator circuit, which includes at least two capacitors and at least two spark gap switches.

[0085] In this embodiment, the pulse capacitor energy storage unit 340 is a Marx generator circuit composed of a super capacitor bank, and a capacitor management system is provided.

[0086] During charging, the capacitors are charged in parallel;

[0087] During discharging, the capacitors are connected in series by breaking down the spark gap switches to generate a first pulse, and the pulse capacitor charging unit is charged.

[0088] And / or, the pulse capacitor energy storage unit 340 charges the pulse capacitor charging unit 350 through at least two charging levels;

[0089] Among them, the number of capacitors connected in series corresponding to each charging level is different.

[0090] Furthermore, the pulse capacitor charging unit 350 includes a DC-DC converter circuit. The primary side of the DC-DC converter circuit includes a full-bridge inverter circuit of IGBTs, and the secondary side of the DC-DC converter circuit includes a full-bridge uncontrolled rectifier circuit.

[0091] And / or, the pulse capacitor charging unit 350 is provided with a dead zone, and the duty cycle of each switch in the pulse capacitor charging unit 350 is less than or equal to 50%.

[0092] And / or, the charging mode of the pulse capacitor charging unit 350 includes a constant current mode and a constant voltage mode, and the pulse capacitor charging unit 350 is controlled in parallel through a voltage loop and a current loop.

[0093] Furthermore, the energy storage device includes a polyphase induction motor and a flywheel body, and the energy storage release unit 250 includes a polyphase synchronous motor.

[0094] The energy storage unit 240 is specifically configured to control the operation of the polyphase induction motor through current control to obtain mechanical energy from the flywheel body.

[0095] In this embodiment, the energy storage unit 240 controls the speed and torque of the polyphase induction motor through current control, so as to operate the flywheel body to obtain mechanical energy.

[0096] In addition, in this embodiment, the polyphase induction motor is feedback to the first inverter unit 230 through a current loop, and the flywheel body is feedback to the first inverter unit 230 through a speed loop, so that the armature current of the polyphase induction motor and the speed of the flywheel body can be controlled stably. The polyphase induction motor adopts a five-phase induction motor, and the speed of the flywheel body is measured by a speed measurement module, and the speed measurement module adopts an orthogonal encoder.

[0097] The energy storage release unit 250 is specifically configured to convert mechanical energy into electrical energy through a polyphase synchronous motor, and input the electrical energy into a programmable adjustable load box and an experimental module 300.

[0098] In this embodiment, the electrical energy generated by the polyphase synchronous motor is used for power supply to the programmable adjustable load box on the one hand, and on the other hand, it can be fed back to the experimental module 300 to form a microgrid, and after polyphase pulse rectification, it is used to supply power to the storage battery, thereby realizing the diversification of power supply.

[0099] Furthermore, the first information includes the first energy storage power information and the motor speed information, and the second information includes the load power information.

[0100] Furthermore, the first energy storage power information, the motor speed information and the load power information are input into a pre-trained neural network model to obtain the first control information and the second control signal;

[0101] The first current-draining unit 210 adjusts the input current according to the first control information, and the second current-draining unit 310 adjusts the three-phase alternating current introduced from the power grid and the second energy storage introduced from the energy storage module 200 according to the second control signal.

[0102] In this embodiment, the management module 100 can collect the information of the energy storage module 200 and the experimental module 300 in real time. By collecting the stored power of the energy storage unit 240 in the energy storage module 200, the rotational speed of the polyphase induction motor, and the power information of the load in the load simulation sub-unit 362 of the experimental module 300, under the condition that the load is operating normally, by adjusting the input ratio of the three-phase alternating current introduced from the power grid and the second energy storage introduced from the energy storage module 200, the power resources of the power grid can be effectively saved.

[0103] In addition, by obtaining the first energy storage power information, motor speed information, and load power information from the historical database, inputting them into the built neural network model, and iterating the weight parameters of the neural network model, a pre-trained neural network model is obtained. The construction of the neural network model and the process of iterating the weight parameters can adopt the methods in the prior art, and will not be specifically described in this embodiment.

[0104] Furthermore, the first inverter unit 230 includes an inverter, a radiator, an optical fiber drive board, a control board, a current and voltage acquisition board, and a key display board;

[0105] Among them, the inverter is a two-level, polyphase H-bridge inverter.

[0106] In this embodiment, the polyphase H-bridge adopts 5 full H-bridges to facilitate changing the topology structure of the inverter during experiments. The specifications of the IGBTs are set according to actual requirements, and the inverter is controlled by the FOC control method.

[0107] And / or, the control forms of the current include current hysteresis control and slip hysteresis control.

[0108] And / or, at least one set of symmetric counterweight blocks is provided on the outer edge of the flywheel body.

[0109] In this embodiment, the flywheel body is a detachable drum-shaped wheel structure, the counterweight blocks are semi-circular arcs, and the counterweight blocks are fixed on the outer edge of the flywheel body by bolts. By adding or reducing symmetric counterweight blocks on the outer edge of the flywheel body, the moment of inertia of the flywheel body can be changed.

[0110] And / or, the polyphase induction motor includes at least one of the windings of 20 slots in the stator, 30 slots in the stator, and 40 slots in the stator.

[0111] In this embodiment, the polyphase induction motor is a five-phase induction motor, which has the above three types of windings at the same time. Therefore, it has advantages such as good starting performance, small distortion of no-load stator current, and a radial air-gap magnetic density waveform closer to a sine wave.

[0112] And / or, the excitation method of the polyphase synchronous motor includes at least one of self-excitation and he-excitation with strong excitation.

[0113] In this embodiment, the polyphase synchronous motor is a three-phase synchronous motor. The three-phase synchronous motor is excited by a combination of self-excitation and he-excitation with strong excitation. That is, the he-excitation winding is connected to an uninterruptible power supply, and the power supply provides the excitation current. When the motor is running, the self-excitation winding is also energized to generate a magnetic field, thereby preventing the loss of the excitation current and ensuring that at least one excitation winding works properly.

[0114] The following refers to Figure 2 and Figure 3 , to illustrate the working principle of the energy storage experimental device in this embodiment:

[0115] In the energy storage module, the three-phase alternating current introduced from the power grid passes through a three-phase full-bridge rectifier device with a phase-shifting transformer. The secondary transformer forms a twelve-pulse DC output voltage, and then passes through an inverter circuit composed of five full H-bridges in parallel. Using direct torque control based on SVPWM, an alternating current close to a sine wave is generated and fed to the five-phase induction motor. The five-phase induction motor adopts three different stator winding structures to drive the flywheel body to rotate for energy storage. Then the flywheel body drives the three-phase synchronous motor to rotate, and the stored mechanical energy is converted into electrical energy and transmitted to the programmable adjustable load box and the second current diversion unit in the experimental module.

[0116] Among them, the phase-shifting transformer makes the voltage waveform of the primary side shift 30° electrical angle for each pulse, and then superimposes it on the original waveform to form a twelve-pulse DC output voltage on the secondary transformer.

[0117] Each phase stator winding of the five-phase motor is independently controlled by a single-phase H-bridge inverter. Among them, the switching devices A1 and A4 of the A-phase H-bridge are turned on and off simultaneously, and A2 and A3 are turned on and off simultaneously. The two groups of IGBT switching states are complementary. The same is true for the other four phases. In addition, the SVPWM control strategy can be optimized to reduce the harmonics output by the inverter and reduce the number of inverter switchings to reduce the inverter loss.

[0118] In this embodiment, the inverter control adopts the SVPWM modulation technology based on five-phase space voltage vectors. By analyzing the synthesis method of five-phase space voltage vectors, a control strategy is proposed, the reference wave expression is solved, and relevant harmonic analysis is carried out. Through harmonic analysis, the operating conditions used by various modulation methods are pointed out, and the modulation strategy with the optimal harmonics is searched, so as to reduce the harmonics output by the inverter and reduce the additional losses caused by the redundant operation of the inverter. This control strategy can adopt different control strategies according to different types of motors, and this embodiment does not make specific restrictions. In addition, the inverter controls the speed of the induction motor through current hysteresis and slip hysteresis to ensure the stability of the output speed and torque of the induction motor.

[0119] In the experimental device, the three-phase alternating current introduced from the power grid passes through a three-phase full-bridge rectifier device with a phase-shifting transformer, and the secondary transformer forms a twelve-pulse DC output voltage. The output direct current is supplied to the battery module for charging. The battery module uses three charging modes, namely constant voltage, constant current and stepped charging, to charge the supercapacitor bank. The supercapacitor bank constitutes a Marx generator, which generates a pulse with a larger voltage level for the DC-DC module. After being boosted by the DC-DC module, a pulse waveform with a higher voltage is transmitted to the discharge unit and the load simulation sub-unit.

[0120] In this embodiment, the supercapacitor bank adopts a Marx generator circuit, and the capacitors are charged in parallel. When discharging, the breakdown sphere gap switch is used to achieve the series connection of capacitors to generate a large voltage to charge the pulse capacitor charging module. Different numbers of capacitors can be connected in series to set different charging levels.

[0121] Among them, the pulse capacitor charging unit adopts a DC-DC converter circuit with series resonance and isolation. The primary side adopts a full-bridge inverter circuit with IGBTs, the secondary side adopts a full-bridge uncontrolled rectifier, and the two sides are connected by a transformer on the primary side, so that the output alternating current passes through an LLC series resonance circuit to reach a specific frequency. In order not to generate a large DC voltage component on the primary side and cause magnetic saturation, the conduction time of the two groups of switches in the primary side full-bridge inverter circuit can be made symmetrical, or a capacitor can be connected in series in the primary side circuit. In addition, in order to avoid the simultaneous conduction of the upper and lower switches in the same half-bridge, a dead zone can be set, and the duty cycle of each switch does not exceed 50%. The charging mode adopts the constant current mode and the constant voltage mode, the control method adopts the parallel connection of the voltage loop and the current loop, and the communication method adopts RS485 or CAN. The pulse capacitor charging unit is also provided with overcurrent protection, overvoltage protection, short-circuit protection and IGBT overheating, etc.

[0122] In this embodiment, the discharge unit is a pulse forming network (PFN), which is composed of more than four pulse forming units (PFUs). The working principle of the pulse forming network PFN is that the capacitors in the circuit first charge the inductor, and then discharge to the load to generate a large current. The discharge mode is parallel discharge of multiple pulse forming units PFUs, and the control mode is synchronous discharge of the first k pulse forming units PFUs and sequential discharge of the remaining pulse forming units PFUs. In addition, the high-power switching devices used to control the pulse forming network PFN include the main circuit discharge switch and the high-current thyristor.

[0123] The battery energy storage unit charges the supercapacitor bank in a stepped charging mode. The inductance of the charging circuit is taken as 2 mH. By selecting appropriate number of steps and switching moments, and the resistance value of the charging resistor, the capacitor voltage is charged to 100 V, and the capacitor current and voltage waveforms are given.

[0124] The pulse capacitor energy storage unit adopts a Marx generator circuit. When this circuit is simulated alone, a DC constant voltage source of 780 V is used, the inductance is 1 mH, the resistance is 1 kΩ, each capacitor is 1 μF, and the conduction frequency of the IGBT switch is 10 Hz.

[0125] When the pulse forming network PFN is simulated alone, the capacitor C = 1 mF, the initial capacitor voltage Uc(0) = 10 kV, the harmonic tuning inductor L = 20 μH, the load resistance R = 30 mΩ, and the time interval is 0.1 mS.

[0126] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0127] Those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of the present invention and forms different embodiments.

[0128] Those skilled in the art can understand that the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0129] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An energy storage experimental device, characterized in that: include: a management module, configured to collect first information and second information, and generate a first control signal and a second control signal based on the first information and the second information; an energy storage module, configured to generate the first information, convert an input current according to the first control signal to obtain a control current, operate an energy storage device with the control current to obtain a first stored energy, and convert the first stored energy into a second stored energy; an experimental module, configured to generate the second information, convert the second stored energy into a third stored energy according to the second control signal, charge the battery with the third stored energy, and display status information of the battery; The experimental module includes: A second diversion unit, configured to introduce three-phase alternating current from a power grid and / or introduce the second energy storage; a second rectifier unit, configured to convert the three-phase alternating current and / or the second stored energy into a second direct current to obtain a third stored energy; a battery energy storage unit, configured to charge the battery using the third energy storage according to a preset charging mode and display status information of the battery; wherein the preset charging mode includes at least one of a constant voltage charging mode, a constant current charging mode, and a step charging mode; and the battery status information includes at least one of a voltage state, a charging state, and a discharging state of the battery; a pulse capacitor energy storage unit, configured to be charged by the battery energy storage unit, generate a first pulse, and display at least one of a series voltage state, a parallel voltage state, a charging state, and a discharging state of the pulse capacitor energy storage unit; a pulse capacitor charging unit, configured to control the first pulse width and perform voltage regulation to generate a second pulse through a reserved open interface; wherein the voltage of the second pulse is greater than the voltage of the first pulse; A discharge unit, comprising: a pulse forming subunit, configured to process the waveform of the second pulse and output a preset pulse waveform; A load simulation subunit, configured to perform one of parallel discharge, synchronous discharge, and time-sequential discharge of at least two modules; The load and measurement unit is used to record the preset pulse waveform when the capture accuracy of the preset pulse waveform is greater than or equal to a preset value, and calculate the load based on the captured preset pulse waveform.

2. The energy storage experimental device according to claim 1, characterized in that: The energy storage module includes: A first current diversion unit is used to introduce three-phase alternating current from the power grid to obtain input current; a first rectifying unit, configured to convert the input current into a first direct current; a first inversion unit, configured to convert the first direct current into a first alternating current of a preset frequency and / or amplitude to obtain a control current; an energy storage unit, configured to operate the energy storage device by controlling the current to obtain first stored energy; an energy storage release unit, configured to convert the first stored energy into a second stored energy through the energy storage device; The first stored energy is mechanical energy, and the second stored energy is electrical energy.

3. The energy storage experimental device according to claim 1, characterized in that: The battery energy storage unit includes at least one lithium iron phosphate battery, each lithium iron phosphate battery is connected in parallel with a voltage regulator tube, and the at least one lithium iron phosphate battery has a 27 series and 8 parallel structure and is charged in a step-by-step charging mode.

4. The energy storage experimental device according to claim 3, characterized in that: The pulse capacitor energy storage unit is a Marx generator circuit, comprising at least two capacitors and at least two ball-gap switches; When charging, the capacitor is charged in parallel; During discharge, the first pulse is generated by breaking down the ball gap switch to connect the capacitors in series, thereby charging the pulse capacitor charging unit; and / or, the pulse capacitor energy storage unit charges the pulse capacitor charging unit through at least two charging levels; Among them, the number of capacitors connected in series corresponding to each charging level is different.

5. The energy storage experimental device according to claim 4, characterized in that: The pulse capacitor charging unit includes a DC-DC converter circuit, the primary side of the DC-DC converter circuit includes an IGBT full-bridge inverter circuit, and the secondary side of the DC-DC converter circuit includes a full-bridge uncontrolled rectifier circuit; and / or, the pulse capacitor charging unit is provided with a dead zone, and a duty cycle of each switch in the pulse capacitor charging unit is less than or equal to 50%; And / or, the charging mode of the pulse capacitor charging unit includes a constant current mode and a constant voltage mode, and the pulse capacitor charging unit is controlled by a voltage loop and a current loop in parallel.

6. The energy storage experimental device according to claim 2, characterized in that: The energy storage device includes a multi-phase induction motor and a flywheel body, and the energy storage release unit includes a multi-phase synchronous motor; The energy storage unit is specifically configured to control the multi-phase induction motor to operate the flywheel body through the control current to obtain the mechanical energy; The energy storage release unit is specifically used to convert the mechanical energy into the electrical energy through the multi-phase synchronous motor, and input the electrical energy into the programmable adjustable load box and the experimental module.

7. The energy storage experimental device according to claim 6, characterized in that: The first information includes first energy storage capacity information and motor speed information, and the second information includes load power information.

8. The energy storage experimental device according to claim 7, characterized in that: Inputting the first energy storage power information, the motor speed information, and the load power information into a pre-trained neural network model to obtain the first control information and the second control signal; The first current diversion unit adjusts the input current according to the first control information, and the second current diversion unit is used to adjust the three-phase alternating current introduced from the power grid and the second stored energy introduced from the energy storage module according to the second control signal.

9. The energy storage experimental device according to claim 6, characterized in that: The first inverter unit includes an inverter, a heat sink, an optical fiber driver board, a control board, a current and voltage acquisition board, and a key display board; Wherein, the inverter is a two-level, multi-phase H-bridge inverter; And / or, the control mode of controlling the current includes current hysteresis control and slip hysteresis control; And / or, at least one set of symmetrical counterweights is provided on the outer edge of the flywheel body; and / or, the multi-phase induction motor includes at least one winding of stator 20 slots, stator 30 slots, and stator 40 slots; And / or, the excitation mode of the multi-phase synchronous motor includes at least one of self-excitation and external excitation.

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