Control module for enabling energy storage power supply to realize AC output grid connection

Abstract

The utility model relates to the technical field of energy storage power supply grid connection, in particular to a control module for enabling an energy storage power supply to realize AC output grid connection. The current acquisition module is used for acquiring current signals in real time through a current sensor; the control modulation module is used for receiving the current signal detected by the current acquisition module and analyzing the current signal to generate an analysis result; according to the utility model, the current acquisition module acquires converted current signals in real time, the signal analysis module receives the acquired current signals and analyzes whether current flows through, and the early warning module gives an early warning according to the received analysis result. An early warning message that the electric power facility may maintain the control switch which disconnects the grid connection of the energy storage power supply is sent to the user side, and an instruction of disconnecting the grid connection is sent to the grid connection control switch of the grid connection control side through the instruction sending module, so that the energy storage power supply is prevented from supplying power to the public power grid during the maintenance of the electric power facility. And the safety of maintenance personnel and equipment is endangered.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage power supply grid connection, in particular to a control module for enabling an energy storage power supply to realize AC output grid connection. Background Art

[0002] With the continuous development of battery technology, electrochemical energy storage has been widely used. Users configure energy storage power supplies to charge during valley periods (when electricity consumption is low, most of the power in the national power grid comes from abandoned power from thermal power plants, wind power, nuclear power plants, etc.), and discharge during peak periods for household use to achieve peak shaving and valley filling and reduce electricity costs.

[0003] When the energy storage power supply is connected to the grid for AC output, due to the regular inspection and maintenance of power distribution facilities and unexpected power outages that occur from time to time, it is necessary to promptly control the connection with the public power grid to prevent the energy storage power supply from supplying power to the public power grid during the maintenance of power distribution facilities, thereby endangering the safety of personnel and equipment being repaired on the public power grid. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a control module that enables an energy storage power supply to achieve AC output and grid connection, thereby solving the problem that the energy storage power supply performs AC output and grid connection during the maintenance of power distribution facilities, which endangers the safety of maintenance personnel and equipment. The utility model has the advantages of real-time detection of the current flowing from the public power grid through the household power grid, and when no current flows, timely disconnection from the grid and sending a reminder message to the user.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A control module for enabling an energy storage power supply to realize AC output and grid connection, comprising a current acquisition module for real-time acquisition of current signals by a current sensor; a control modulation module for receiving the current signal detected by the current acquisition module and analyzing and generating an analysis result; the control modulation module comprises a signal analysis module for receiving the current signal and analyzing and generating an analysis result; and a grid connection processing module for receiving the analysis result of the signal analysis module and processing the analysis result to generate a processing result; the grid connection processing module comprises an early warning module for sending early warning information to a user end according to the processing result; an instruction sending module for analyzing the processing result to generate an instruction and sending the instruction to a grid connection control end; and a charging request module for sending a charging request to the energy storage power supply.

[0007] Furthermore, the control module also includes a communication module that establishes a communication connection with the control modulation module, and the communication module is used to send the warning information of the warning module to the user end.

[0008] Furthermore, the control module also includes a grid-connected control module for receiving instructions sent by the instruction sending module and controlling the energy storage power supply AC output to be connected to the grid by executing the instructions.

[0009] Furthermore, the control module also includes a grid-connected inverter module for converting direct current of the energy storage power supply into alternating current.

[0010] Furthermore, the control module also includes an AC / DC conversion module for converting alternating current of the public power grid into direct current.

[0011] Furthermore, the energy storage power supply includes a lithium battery pack for storing electricity and a lithium battery charge and discharge controller, and the lithium battery charge and discharge controller is used to receive the charging request sent by the charging request module and process the charging request.

[0012] Furthermore, the current acquisition module adopts a current sensor of model CC6920BSO-20A.

[0013] Furthermore, the control modulation module adopts an MCU of model GD32F303CBT6.

[0014] Compared with the prior art, the utility model provides a control module that enables the energy storage power supply to achieve AC output and grid connection, which has the following beneficial effects:

[0015] 1. The utility model collects the converted current signal in real time through the current acquisition module, receives the collected current signal through the signal analysis module, analyzes whether there is current flowing, and the early warning module sends a warning message to the user end according to the received analysis result that the power facility may be under maintenance and the control switch of the energy storage power supply has been disconnected from the grid, and sends a disconnection command to the grid control switch of the grid control end through the instruction sending module, so as to prevent the energy storage power supply from supplying power to the public power grid during the maintenance of the power facility, which endangers the safety of maintenance personnel and equipment.

[0016] 2. The utility model sends warning information to the user through the wireless WiFi of the communication module, reminding the user that the current power facilities may be under maintenance and the control switch for the energy storage power supply to be connected to the grid has been disconnected. The user can view the grid connection status by downloading the relevant APP, which is convenient for the user to understand the grid connection status of the energy storage power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1This is a principle block diagram of a control module that enables an energy storage power supply to achieve AC output and grid connection;

[0019] Figure 2 This is a principle block diagram of the control modulation module of the utility model;

[0020] Figure 3 The utility model is an inverter circuit diagram of a grid-connected inverter module.

[0021] In the figure:

[0022] 1. Current acquisition module;

[0023] 2. Control modulation module; 21. Signal analysis module;

[0024] 22. Grid connection processing module; 221. Early warning module; 222. Instruction sending module; 223. Charging request module;

[0025] 3. Communication module; 4. Grid-connected control module; 5. Grid-connected inverter module; 6. AC / DC conversion module. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Figure 1-Figure 3An embodiment of the utility model is as follows: a control module for enabling an energy storage power supply to realize AC output and grid connection, including a current acquisition module 1 for real-time acquisition of current signals by a current sensor, the current acquisition module 1 adopts a current sensor of model CC6920BSO-20A; a control modulation module 2 for receiving the current signal detected by the current acquisition module 1 and analyzing and generating an analysis result, the control modulation module 2 adopts an MCU of model GD32F303CBT6; the control modulation module 2 includes a signal analysis module 21 for receiving the current signal and analyzing and generating an analysis result; and, receiving the analysis result of the signal analysis module 21 and processing the analysis result. The grid-connected processing module 22 generates processing results; the grid-connected processing module 22 includes an early warning module 221 that sends early warning information to the user end according to the processing results; an instruction sending module 222 that analyzes the processing results and generates instructions, and sends the instructions to the grid-connected control end; and a charging request module 223 that sends a charging request to the energy storage power supply. The control module also includes an AC / DC conversion module 6 for converting the alternating current of the public power grid into direct current. The signal analysis module 21, the early warning module 221, the instruction sending module 222, and the charging request module 223 all use the built-in algorithm of the MCU model GD32F303CBT6. The AC / DC conversion module 6 adopts An AC-DC controller of model SD6861 is used to convert the alternating current flowing into the energy storage power supply from the public power grid into direct current through the AC / DC conversion module 6, and the converted current signal is collected in real time through the current acquisition module 1. The collected current signal is received through the signal analysis module 21 to analyze whether there is current flowing. When the received current signal is empty, an analysis result of no current flowing is generated, otherwise an analysis result of current flowing is generated. When the analysis result received by the early warning module 221 is that there is no current flowing, an early warning message is sent to the user end that the power facility may be under maintenance and the control switch that has been disconnected from the energy storage power supply grid is currently disconnected, and the instruction sending module 222 is sent to the user end. The grid-connected control switch at the grid-connected control end sends a command to disconnect the grid to prevent the energy storage power supply from supplying electricity to the public power grid during the maintenance of the power facilities, which would endanger the safety of the maintenance personnel and equipment. When the received analysis result is that there is current passing, the grid-connected command is sent to the grid-connected control switch at the grid-connected control end through the command sending module 222, and the charging request is sent to the energy storage power supply through the charging request module 223. The electricity in the time period when the electricity price of the public power grid is low is stored in the energy storage power supply for use in the household power grid. The energy storage power supply can be used in the time period when the electricity price is high. The energy storage power supply can also supply electricity to the public power grid, and the public power grid can be used to charge at a low price and supply electricity at a high price, so that certain profits can be obtained.

[0028] The control module also includes a communication module 3 that establishes a communication connection with the control modulation module 2. The communication module 3 is used to send the warning information of the warning module 221 to the user end. The communication module 3 adopts a WiFi+Bluetooth module of model ESP32-C3-WROOM02. The warning information is sent to the user through the wireless WiFi of the communication module 3, reminding the user that the current power facilities may be under maintenance and the control switch for the energy storage power supply to be connected to the grid has been disconnected. The user can view the grid connection status by downloading the relevant APP, which is convenient for the user to grasp the grid connection status of the energy storage power supply.

[0029] The control module also includes a grid-connected control module 4 for receiving instructions sent by the instruction sending module 222, and controlling the AC output of the energy storage power supply to be connected to the grid by executing the instructions. The grid-connected control module 4 uses a relay, and the grid-connected control module 4 executes the instructions sent by the instruction sending module 222 to realize the on-off of the grid-connected circuit through the relay. The control module also includes a grid-connected inverter module 5 for converting the DC power of the energy storage power supply into AC power. Figure 3 As shown, the direct current of the energy storage power supply is converted into alternating current and transmitted to the public power grid through the inverter circuit in the grid-connected inverter module 5. Users can charge the energy storage power supply for use in the home power grid during the period of low electricity charges. When the electricity charges are high, the home electricity can be used off-grid and the energy storage power supply can be used. The energy storage power supply can also transmit electricity to the public power grid. By utilizing the public power grid electricity charges at low prices for charging and high prices for transmitting electricity, certain profits can also be obtained. The energy storage power supply includes a lithium battery pack for storing electricity and a lithium battery charge and discharge controller. The lithium battery charge and discharge controller is used to receive the charging request sent by the charging request module 223 and process the charging request. The lithium battery charge and discharge controller receives the charging request, stores and processes the charging request, and stores the electricity from the public power grid in the lithium battery pack.

[0030] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control module for enabling an energy storage power supply to achieve AC output and grid connection, characterized in that: It comprises a current acquisition module (1) for acquiring current signals in real time through a current sensor; and a control modulation module (2) for receiving the current signals detected by the current acquisition module (1) and analyzing and generating analysis results. The control modulation module (2) comprises a signal analysis module (21) for receiving a current signal and analyzing it to generate an analysis result; and a grid connection processing module (22) for receiving the analysis result of the signal analysis module (21) and processing the analysis result to generate a processing result; The grid-connected processing module (22) comprises an early warning module (221) for sending early warning information to a user terminal according to a processing result; an instruction sending module (222) for analyzing the processing result to generate an instruction and sending the instruction to a grid-connected control terminal; and a charging request module (223) for sending a charging request to an energy storage power source.

2. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The control module further comprises a communication module (3) which establishes a communication connection with the control modulation module (2), and the communication module (3) is used to send the warning information of the warning module (221) to the user end.

3. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The control module also includes a grid connection control module (4) for receiving instructions sent by the instruction sending module (222) and controlling the energy storage power supply AC output to be connected to the grid by executing the instructions.

4. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The control module also includes a grid-connected inverter module (5) for converting direct current of the energy storage power supply into alternating current.

5. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The control module also includes an AC / DC conversion module (6) for converting alternating current from the public power grid into direct current.

6. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The energy storage power supply comprises a lithium battery pack for storing electricity and a lithium battery charge and discharge controller, wherein the lithium battery charge and discharge controller is used to receive a charging request sent by the charging request module (223) and process the charging request.

7. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The current acquisition module (1) adopts a current sensor of model CC6920BSO-20A.

8. A control module for enabling an energy storage power source to achieve AC output and grid connection according to claim 1, characterized in that: The control modulation module (2) adopts an MCU of model GD32F303CBT6.

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