Electric energy fluctuation stabilizing circuit and energy storage electronic equipment
By designing an electrical energy fluctuation suppression circuit, using the cooperation between the DCDC module and the DCAC module and the energy storage module, the harmonic problem caused by the power instability of the new energy generation side is solved, the harmonic reduction and energy reuse are achieved, and the stability and energy utilization of the circuit are improved.
Patent Information
- Application Number
- CN202323367967.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-11
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2033-12-11
AI Technical Summary
The output power instability of the new energy power generation side leads to harmonic generation, causing problems such as local high temperatures, transformer damage, and power waste.
A power fluctuation suppression circuit is designed, including a DCDC module, a DCAC module, a first control module and an energy storage module. Through the on and off of the control module, the conversion and storage of electrical energy is realized, and harmonics are reduced and energy is reused.
Effectively reduce harmonics in the circuit, improve energy usage, reduce power waste, and improve circuit stability and safety.
Smart Images
Figure CN223181818U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of new energy, and particularly to a power fluctuation suppression circuit and an energy storage electronic device. Background Art
[0002] With the continuous development of technology, the existing energy storage systems in the energy storage field can store and release electric energy between the power generation side, the grid side and the user side, and have functions such as peak shaving and valley filling, peak regulation and frequency modulation, and coordinating the grid connection of new energy power generation. Due to the intermittency and instability of the output power on the new energy power generation side, a large amount of harmonics will be generated. Utility Model Content
[0003] In view of the above problems, the present application proposes a power fluctuation suppression circuit and an energy storage electronic device.
[0004] In a first aspect, the present utility model provides a power fluctuation suppression circuit, including: a DCDC module, a first control module and an energy storage module, wherein the DCDC module is connected to the energy storage module through the first control module;
[0005] The first control module is configured to conduct between the DCDC module and the energy storage module, so that when the voltage input to the DCDC module has an instantaneous fluctuation, the DCDC module converts the absorbed electric energy and stores it in the energy storage module for suppression.
[0006] In an optional embodiment, a DCAC module is further included. The first positive output terminal of the DCDC module is respectively connected to the first positive input terminal of the DCAC module and the first positive terminal of the first control module, and the first negative output terminal of the DCDC module is respectively connected to the first negative input terminal of the DCAC module and the first negative terminal of the first control module;
[0007] The second positive terminal and the second negative terminal of the first control module are respectively connected to the positive electrode and the negative electrode of the energy storage module;
[0008] The first control module is configured to simultaneously conduct between the DCDC module, the DCAC module and the energy storage module, so that the DCDC module converts the absorbed electric energy and stores it in the energy storage module, or the DCAC module converts the electric energy released by the energy storage module and outputs it.
[0009] In an optional embodiment, a second control module is further included, and the second control module is respectively connected to the DCDC module and the DCAC module;
[0010] The second control module is configured to obtain the voltage between the first positive output terminal and the first negative output terminal of the DCDC module, and the voltage between the second positive input terminal and the second negative input terminal of the DCDC module, so as to control the adjustment parameters of the DCDC module;
[0011] The second control module is further configured to obtain the DC voltage input by the DCAC module and the three-phase AC voltage output by the DCAC module, so as to control the adjustment parameters of the DCAC module.
[0012] In an alternative embodiment, the first control module includes a first switch and a second switch. One end of the first switch is connected to the positive electrode of the energy storage module, and the other end of the first switch is respectively connected to the first positive output terminal of the DCDC module and the first positive input terminal of the DCAC module;
[0013] One end of the second switch is connected to the negative electrode of the energy storage module, and the other end of the second switch is respectively connected to the first negative output terminal of the DCDC module and the first negative input terminal of the DCAC module.
[0014] In an alternative embodiment, the first control module further includes a protection circuit, and the protection circuit is connected in parallel with the first switch; the protection circuit includes a third switch and a resistor. One end of the third switch is respectively connected to the positive electrode of the energy storage module and one end of the first switch, and the other end of the third switch is respectively connected to the negative electrode of the energy storage module and the other end of the first switch through the resistor.
[0015] In an alternative embodiment, a fuse is further included, and after the protection circuit is connected in parallel with the first switch, it is respectively connected to the first positive output terminal of the DCDC module and the first positive input terminal of the DCAC module through the fuse.
[0016] In an alternative embodiment, a first disconnecting switch, a second disconnecting switch and a third disconnecting switch are further included;
[0017] The first disconnecting switch is connected in series between the energy storage module and the first control module, and is used to switch on and off the connection between the energy storage module and the first control module;
[0018] The second disconnecting switch is connected in series at the input end of the DCDC module and is used to control whether to input electric energy;
[0019] The third disconnecting switch is connected in series at the output end of the DCAC module and is used to control whether to output electric energy.
[0020] In an alternative embodiment, a third control module is further included, and the third control module is respectively connected to the energy storage module, the DCDC module, the DCAC module, the first disconnector, the second disconnector, and the third disconnector;
[0021] The third control module is configured to control whether the DCDC module and the DCAC module operate according to the obtained energy storage state of the energy storage module, and control the closing and opening of the first disconnector, the second disconnector, and the third disconnector.
[0022] In an alternative embodiment, a bus capacitor is further included, and the bus capacitor is connected in series between the second positive input terminal and the second negative input terminal of the DCDC module.
[0023] In a second aspect, the present invention provides an energy storage electronic device, including the power fluctuation suppression circuit according to any one of the foregoing embodiments.
[0024] The embodiments of the present application have the following beneficial effects:
[0025] The embodiments of the present application propose a power fluctuation suppression circuit, which includes a DCDC module, a first control module, and an energy storage module. The DCDC module is connected to the energy storage module through the first control module. The first control module is configured to conduct between the DCDC module and the energy storage module, so that when the voltage input to the DCDC module has an instantaneous fluctuation, the DCDC module converts the absorbed electric energy and stores it in the energy storage module for suppression. The present application can recycle harmonic energy and store it in the energy storage module, which can not only reduce the harmonics in the circuit, but also reuse the energy and improve the energy utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the protection scope of the present application. In each drawing, similar components are numbered similarly.
[0027] Figure 1 FIG. 1 shows a first structural schematic diagram of a power fluctuation suppression circuit according to some embodiments of the present application;
[0028] Figure 2 FIG. 2 shows a second structural schematic diagram of a power fluctuation suppression circuit according to some embodiments of the present application;
[0029] Figure 3 FIG. 3 shows a third structural schematic diagram of a power fluctuation suppression circuit according to some embodiments of the present application;
[0030] Figure 4 Shows a fourth structural schematic diagram of the power fluctuation suppression circuit according to some embodiments of the present application. Specific embodiments
[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0032] Generally, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents selected embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.
[0033] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are only intended to represent specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.
[0034] In addition, the terms "first", "second", "third", etc. are only used for differential description and cannot be construed as indicating or implying relative importance.
[0035] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the various embodiments of the present application belong. The terms (such as those defined in a general-use dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or being overly formal, unless clearly defined in the various embodiments of the present application.
[0036] Next, some embodiments of the present application will be described in detail with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0037] Generally, the power generated by new energy power generation is unstable, so a large amount of harmonics will be generated. Too large harmonics are likely to cause local high temperature and an increase in the proportion of copper damage to transformers. For example, it generates additional power loss, heat, mechanical vibration and noise in the rotating motors of generators. Moreover, harmonics increase the additional loss of the power supply line and reduce the efficiency. Due to the skin effect and proximity effect, the line resistance increases with the increase of frequency, resulting in waste of electric energy.
[0038] Therefore, to solve the above problems, this application proposes a power fluctuation suppression circuit.
[0039] Please refer to Figure 1 , which is a schematic structural diagram of the power fluctuation suppression circuit proposed in the embodiment of this application.
[0040] In some embodiments, the power fluctuation suppression circuit includes: a DCDC module 110, a DCAC module 120, a first control module 130, and an energy storage module 140;
[0041] The first positive output terminal of the DCDC module 110 is respectively connected to the first positive input terminal of the DCAC module 120 and the first positive terminal of the first control module 130. The first negative output terminal of the DCDC module 110 is respectively connected to the first negative input terminal of the DCAC module 120 and the first negative terminal of the first control module 130. The second positive terminal and the second negative terminal of the first control module 130 are respectively connected to the positive electrode and the negative electrode of the energy storage module 140.
[0042] Specifically, the DCDC module 110 includes 4 ports, namely the second positive input terminal, the second negative input terminal, the first positive output terminal, and the first negative output terminal. When it is necessary to suppress the harmonics on the grid side, the first control module 130 is turned on to make the DCDC module 110 conduct with the energy storage module 140. The DCDC module 110 adjusts and converts the voltage Vi transmitted from the grid side or other places into Vo, so that when the voltage input to the DCDC module 110 fluctuates instantaneously, the DCDC module 110 converts the absorbed electric energy and stores it in the energy storage module 140 for suppression. Optionally, Vi can be stepped down to obtain Vo. The reason for choosing to step down here is mainly to store the voltage on the grid side, and generally the voltage required by the storage module is lower than that on the grid side. Of course, the DCDC module 110 can also step up, which is not limited here. Optionally, the DCDC module 110 can also convert DC voltage bidirectionally.
[0043] The DCAC module 120 includes four ports, namely the first positive input terminal, the first negative input terminal, the second positive output terminal, and the second negative output terminal. When the energy storage module 140 needs to discharge, it is necessary to turn on the first control module 130 to make the energy storage module 140 conduct with the DCAC module 120. The DCAC module 120 converts the DC voltage transmitted by the energy storage module 140 into an AC three-phase voltage and outputs it to the outside.
[0044] The first control module 130 is used to control the conduction and cut-off between the DCDC module 110 and the DCAC module 120 and the energy storage module 140 respectively. When it is necessary to reduce the harmonics on the grid side, the excess electric energy can be stored in the energy storage module 140 through the DCDC module 110. When power is needed, the electric energy stored in the energy storage module 140 can be supplied to the outside (which can be a load, a power generation side, etc.) through the DCAC module 120. This can not only reduce the harmonics on the grid side, but also recycle the excess energy and improve the utilization rate of energy.
[0045] In the power fluctuation smoothing circuit of some embodiments, such as Figure 2 shown, the first control module 130 includes a first switch K1 and a second switch K2. One end of the first switch K1 is connected to the positive electrode of the energy storage module 140, and the other end of the first switch K1 is respectively connected to the first positive output terminal of the DCDC module 110 and the first positive input terminal of the DCAC module 120. One end of the second switch K2 is connected to the negative electrode of the energy storage module 140, and the other end of the second switch K2 is respectively connected to the first negative output terminal of the DCDC module 110 and the first negative input terminal of the DCAC module 120.
[0046] Specifically, the first control module 130 includes two busbars. The first positive output terminal of the DCDC module 110 and the first positive input terminal of the DCAC module 120 are connected in parallel to form the first busbar, and the first negative output terminal of the DCDC module 110 and the first negative input terminal of the DCAC module 120 are connected in parallel to form the second busbar. Each busbar is connected in series with a switch. The first busbar is connected in series with the first switch K1, and the second busbar is connected in series with the second switch K2. The first switch K1 controls the conduction / disconnection between the positive electrode of the energy storage module 140 and the first positive output terminal of the DCDC module 110 and the first positive input terminal of the DCAC module 120, and the second switch K2 controls the conduction / disconnection between the negative electrode of the energy storage module 140 and the first negative output terminal of the DCDC module 110 and the first negative input terminal of the DCAC module 120.
[0047] In the power fluctuation smoothing circuit of some embodiments, such as Figure 2 shown, the first control module 130 further includes a protection circuit 131, and the protection circuit 131 is connected in parallel with the first switch K1.
[0048] Specifically, when the energy storage module 140 is just connected to the DCDC module 110, an instantaneous current (excessive current) will be generated, which may cause damage to the circuit. Therefore, a protection circuit 131 needs to be added, and both ends of the protection circuit 131 are respectively connected to both ends of the first switch K1.
[0049] In the power fluctuation suppression circuit of some embodiments, the protection circuit 131 includes a third switch K3 and a resistor R. One end of the third switch K3 is respectively connected to the positive electrode of the energy storage module 140 and one end of the first switch K1, and the other end of the third switch K3 is respectively connected to the negative electrode of the energy storage module 140 and the other end of the first switch K1 through the resistor R.
[0050] Specifically, the usage method of the protection circuit 131 is as follows: First, close the second switch K2 to make the energy storage module 140 conduct with the DCDC module 110, and then turn on the protection circuit 131 (i.e., close the third switch K3) to make the instantaneous current flow through the protection circuit 131, so that the resistor R divides the voltage to reduce the bus current and protect the safety of the entire circuit. After a preset time (when the instantaneous current recovers), close the first switch K1 and open the third switch K3 to make the entire circuit conduct normally. Among them, the value range of the preset time can be 1 to 8 seconds. Of course, it can also be other value ranges, which are selected according to the actual situation.
[0051] Optionally, the resistor R can be replaced by several resistors with smaller resistance values in series. For example, it can be replaced by resistor R1 and resistor R2, and the resistance values of resistor R1 and resistor R2 are smaller than the resistance value of resistor R.
[0052] In the power fluctuation suppression circuit of some embodiments, as Figure 2 shown, the power fluctuation suppression circuit further includes a fuse FU. After the protection circuit 131 is connected in parallel with the first switch K1, it is respectively connected to the first positive output terminal of the DCDC module 110 and the first positive input terminal of the DCAC module 120 through the fuse FU.
[0053] Specifically, the fuse FU is connected in series in the first bus of the first control module 130. When the current is too large, the fuse FU melts to disconnect the circuit for protection.
[0054] In some embodiments, as Figure 3As shown, the power fluctuation suppression circuit further includes a second control module 150, and the second control module 150 is respectively connected to the DCDC module 110 and the DCAC module 120. The second control module 150 is configured to obtain the voltage between the first positive output terminal and the first negative output terminal of the DCDC module 110, and the voltage between the second positive input terminal and the second negative input terminal of the DCDC module 110, so as to control the adjustment parameter of the DCDC module 110. The second control module 150 is configured to obtain the DC voltage input by the DCAC module 120 and the three-phase AC voltage output by the DCAC module 120, so as to control the adjustment parameter of the DCAC module 120.
[0055] Specifically, by changing the adjustment parameter, the proportional relationship between the input voltage and the output voltage can be changed. For example, the voltage input to the DCDC module 110 is Vi, and the output voltage after conversion by the DCDC module 110 is Vo. The relationship between Vi and Vo is 1 / (1 + D)=Vo / Vi, where D is the adjustment parameter. The DCDC module 110 converts the input voltage Vi into the output voltage Vo according to the adjustment parameter D. Since both the input voltage Vi and the output voltage Vo change in real time. Therefore, the second control module 150 will calculate the value of the adjustment parameter D in real time according to the obtained input voltage Vi and output voltage Vo, and then transmit the value of D to the DCDC module 110 for controlling the DCDC module 110 to convert the input voltage Vi in real time.
[0056] Exemplarily, if the first input voltage at the previous moment is V1, the corresponding first adjustment parameter is D1, and the first adjustment parameter D1 is transmitted to the DCDC module 110. The DCDC module 110 adjusts according to the first adjustment parameter D1 and outputs the first output voltage Vo1; if the second input voltage at the current moment is V2, the corresponding second adjustment parameter is D2, and the second adjustment parameter D2 is transmitted to the DCDC module 110. The DCDC module 110 adjusts according to the second adjustment parameter D2 and outputs the second output voltage Vo2.
[0057] In some embodiments, as Figure 2 described, the power fluctuation suppression circuit further includes a first disconnecting switch Q1, a second disconnecting switch Q2, and a third disconnecting switch Q3. The first disconnecting switch Q1 is connected in series between the energy storage module 140 and the first control module 130 for turning on and off the connection between the energy storage module 140 and the first control module 130. The second disconnecting switch Q2 is connected in series at the input end of the DCDC module 110 for controlling whether to input electric energy. The third disconnecting switch Q3 is connected in series at the output end of the DCAC module 120 for controlling whether to output electric energy.
[0058] Specifically, when the energy storage module 140 does not need to be charged (for example, when the energy storage of the energy storage module 140 is full or reaches a certain value), the energy storage module 140 needs to be disconnected from the DCDC module 110. When it is necessary / not necessary for the energy storage module 140 to discharge externally, the DCAC module 120 is conducted / disconnected from the energy storage module 140. When the current in the circuit is too large, the voltage is too large, or a certain component is damaged, the circuit needs to be switched to protect the safety of the circuit 131. Therefore, the first disconnecting switch Q1, the second disconnecting switch Q2, and the third disconnecting switch Q3 are added.
[0059] In some embodiments, such as Figure 4 shown, the power fluctuation suppression circuit further includes a third control module 160, and the third control module 160 is respectively connected to the energy storage module 140, the DCDC module 110, the DCAC module 120, the first disconnecting switch Q1, the second disconnecting switch Q2, and the third disconnecting switch Q3.
[0060] Specifically, the third control module 160 is used to control whether the DCDC module 110 and the DCAC module 120 work according to the obtained energy storage state of the energy storage module 140, and to control the closing and opening of the first disconnecting switch Q1, the second disconnecting switch Q2, and the third disconnecting switch Q3.
[0061] Exemplarily, when it is necessary to charge the energy storage module 140 (when it is detected that the power of the energy storage module 140 has not reached the preset power threshold), the first disconnecting switch Q1 and the second disconnecting switch Q2 need to be controlled to conduct, and then the first control module 130 conducts the second switch K2, conducts the third switch K3, and finally conducts the first switch K1, and disconnects the third switch K3 to charge the energy storage module 140.
[0062] When it is necessary to discharge the energy storage module 140, it is necessary to control the second disconnecting switch Q2 to turn off, conduct the first disconnecting switch Q1 and the third disconnecting switch Q3, and then the first control module 130 conducts the second switch K2, conducts the third switch K3, and finally conducts the first switch K1, and disconnects the third switch K3 so that the energy storage module 140 discharges externally.
[0063] When a fault occurs during charging, at least one of the DCDC module 110, the first disconnecting switch Q1, or the second disconnecting switch Q2 can be selected to be disconnected; when a fault occurs during discharging, at least one of the DCAC module 120, the first disconnecting switch Q1, or the third disconnecting switch Q3 can be selected to be disconnected.
[0064] In some embodiments, the power fluctuation suppression circuit further includes a bus capacitor C, and the bus capacitor C is connected in series between the second positive input terminal and the second negative input terminal of the DCDC module 110.
[0065] Specifically, due to the intermittency and instability of the output power on the grid side, the voltage is unstable. Therefore, a bus capacitor C is added to stabilize the input voltage of the DCDC module 110.
[0066] An embodiment of the present application provides a power fluctuation suppression circuit, which includes a DCDC module 110, a DCAC module 120, a first control module 130, and an energy storage module 140. The first positive output terminal of the DCDC module 110 is respectively connected to the first positive input terminal of the DCAC module 120 and the first positive terminal of the first control module 130, and the first negative output terminal of the DCDC module 110 is respectively connected to the first negative input terminal of the DCAC module 120 and the first negative terminal of the first control module 130. The second positive terminal and the second negative terminal of the first control module 130 are respectively connected to the positive electrode and the negative electrode of the energy storage module 140. The present application can recover and store harmonic energy in the energy storage module 140, which can not only reduce the harmonics in the circuit, but also reuse the energy and improve the energy utilization rate.
[0067] In addition, the present application also provides multiple control modules, which close or open the corresponding modules when certain conditions are reached, and accurately adjust the DCDC module 110 and the DCAC module 120 according to the energy storage state of the energy storage module 140 and the voltages (output voltage and input voltage) across the DCDC module 110 in real time, so as to improve the accuracy, stability, and safety of the circuit.
[0068] Another embodiment of the present application also provides an energy storage electronic device, including the above-mentioned power fluctuation suppression circuit.
[0069] It can be understood that the method steps in this embodiment correspond to the power fluctuation suppression circuit in the above embodiment. Among them, the optional items of the above power fluctuation suppression circuit are also applicable to this embodiment, and will not be repeated here.
[0070] In several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and structural diagrams in the accompanying drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of this application. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the blocks can occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the structural diagram and / or flowchart, as well as the combination of blocks in the structural diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.
[0071] In addition, each functional module or unit in various embodiments of this application can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.
[0072] If the above functions are implemented in the form of software functional modules and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks, or optical discs that can store program codes.
[0073] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of changes or substitutions, which should all be covered by the protection scope of this application.
Claims
1. A power fluctuation suppression circuit, characterized in that, Including: A DCDC module, a first control module, and an energy storage module, where the DCDC module is connected to the energy storage module through the first control module; The first control module is configured to conduct between the DCDC module and the energy storage module, so that when there is an instantaneous voltage fluctuation in the voltage input to the DCDC module, the DCDC module converts the absorbed electric energy and stores it in the energy storage module for suppression.
2. The power fluctuation suppression circuit according to claim 1, wherein It further includes a DCAC module. The first positive output terminal of the DCDC module is respectively connected to the first positive input terminal of the DCAC module and the first positive terminal of the first control module. The first negative output terminal of the DCDC module is respectively connected to the first negative input terminal of the DCAC module and the first negative terminal of the first control module; The second positive terminal and the second negative terminal of the first control module are respectively connected to the positive electrode and the negative electrode of the energy storage module; The first control module is configured to conduct between the DCDC module, the DCAC module, and the energy storage module simultaneously, so that the DCDC module converts the absorbed electric energy and stores it in the energy storage module, or the DCAC module converts the electric energy released from the energy storage module and outputs it.
3. The power fluctuation suppression circuit according to claim 2, wherein It further includes a second control module, and the second control module is respectively connected to the DCDC module and the DCAC module; The second control module is configured to obtain the voltage between the first positive output terminal and the first negative output terminal of the DCDC module, and the voltage between the second positive input terminal and the second negative input terminal of the DCDC module, to control the adjustment parameters of the DCDC module; The second control module is further configured to obtain the DC voltage input to the DCAC module and the three-phase AC voltage output by the DCAC module, to control the adjustment parameters of the DCAC module.
4. The power fluctuation suppression circuit according to claim 2, characterized in that, The first control module includes a first switch and a second switch. One end of the first switch is connected to the positive electrode of the energy storage module, and the other end of the first switch is respectively connected to the first positive output terminal of the DCDC module and the first positive input terminal of the DCAC module; One end of the second switch is connected to the negative electrode of the energy storage module, and the other end of the second switch is respectively connected to the first negative output terminal of the DCDC module and the first negative input terminal of the DCAC module.
5. The power fluctuation suppression circuit according to claim 4, wherein The first control module further includes a protection circuit, and the protection circuit is connected in parallel with the first switch; the protection circuit includes a third switch and a resistor. One end of the third switch is respectively connected to the positive electrode of the energy storage module and one end of the first switch, and the other end of the third switch is respectively connected to the negative electrode of the energy storage module and the other end of the first switch through the resistor.
6. The power fluctuation suppression circuit according to claim 5, wherein It further includes a fuse, and after the protection circuit is connected in parallel with the first switch, it is respectively connected to the first positive output terminal of the DCDC module and the first positive input terminal of the DCAC module through the fuse.
7. The power fluctuation suppression circuit according to claim 2, wherein It further includes a first disconnector, a second disconnector, and a third disconnector; The first disconnecting switch is connected in series between the energy storage module and the first control module, and is used to switch on and off the connection between the energy storage module and the first control module; The second disconnecting switch is connected in series at the input end of the DCDC module, and is used to control whether to input electric energy; The third disconnecting switch is connected in series at the output end of the DCAC module, and is used to control whether to output electric energy.
8. The power fluctuation suppression circuit according to claim 7, wherein, It further includes a third control module, and the third control module is respectively connected to the energy storage module, the DCDC module, the DCAC module, the first disconnecting switch, the second disconnecting switch and the third disconnecting switch; The third control module is used to control whether the DCDC module and the DCAC module work according to the obtained energy storage state of the energy storage module, and to control the closing and opening of the first disconnecting switch, the second disconnecting switch and the third disconnecting switch.
9. The power fluctuation suppression circuit according to claim 1, wherein, It further includes a bus capacitor, and the bus capacitor is connected in series between the second positive input terminal and the second negative input terminal of the DCDC module.
10. A energy storage electronic device, characterized in that, It includes the electric energy fluctuation suppression circuit according to any one of claims 1 to 9.