Micro-grid light storage integrated cabinet system

Abstract

The utility model relates to the technical field of energy storage, disclose a kind of microgrid light storage integrated cabinet system, including cabinet, and the integrated control unit of being arranged in the cabinet, multiple direct current converters DCDC and multiple power conversion systems PCS;Integrated control unit is configured as integrated battery management unit BAU function and energy management unit EMS function, form two-in-one EMS;Integrated control unit is connected with each direct current converter DCDC in multiple direct current converters DCDC respectively;Integrated control unit is connected with each power conversion system PCS of multiple power conversion systems PCS respectively;Each direct current converter DCDC is for the photovoltaic direct current input to it is boosted and is output to each power conversion system PCS and the battery cabinet of battery interface access by integrated control unit;Each power conversion system PCS is for the direct current input to it is converted into alternating current, provide for load use.The utility model can improve the reliability and stability of microgrid light storage integrated cabinet system based on hybrid communication.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to a microgrid photovoltaic energy storage integrated cabinet system. Background Technology

[0002] A microgrid-based integrated photovoltaic-storage energy storage system refers to a system that stores energy, such as electrical energy, through various media and releases it when needed. The system consists of two main parts: energy storage devices composed of energy storage components and grid connection devices composed of power electronic devices. The energy storage devices primarily store, release, or rapidly exchange energy. The grid connection devices enable bidirectional energy transfer and conversion between the energy storage devices and the power grid, achieving functions such as peak shaving, energy optimization, improved power supply reliability, and power system stability. The communication methods and approaches used in microgrid-based integrated photovoltaic-storage cabinets are particularly important, and reliability and stability are crucial considerations. Utility Model Content

[0003] In view of this, in order to solve the technical problems existing in the prior art, the present invention provides a microgrid optical storage integrated cabinet system.

[0004] This utility model discloses a microgrid photovoltaic storage integrated cabinet system, which includes a cabinet, and an integrated control unit, multiple DC-DC converters (DCDCs) and multiple power conversion systems (PCSs) disposed within the cabinet; the integrated control unit is configured to integrate the functions of a battery management unit (BAU) and an energy management unit (EMS), forming a two-in-one EMS; the integrated control unit is connected to each of the multiple DC-DC converters (DCDCs); the integrated control unit is connected to each of the multiple power conversion systems (PCSs); Each DC-DC converter is used to boost the input photovoltaic DC power and output it to each power conversion system PCS and the battery cabinet connected to the battery interface through the integrated control unit. Each power conversion system (PCS) is used to convert the input DC power into AC power for use by the load.

[0005] Furthermore, the integrated control unit is used to receive operating data from each DC-DC converter and each power conversion system (PCS), generate coordinated control commands based on the operating data, and send the coordinated control commands to each power conversion system (PCS) and DC-DC converter respectively, so as to perform integrated control of multiple power conversion systems (PCS) and multiple DC-DC converters.

[0006] Furthermore, the integrated control unit is connected to multiple power conversion systems (PCS) via a first communication interface and to multiple DC-DC converters (DCDC) via a second communication interface; the communication protocols of the first and second communication interfaces are independent of each other.

[0007] Furthermore, the first communication interface is a CAN bus interface or a Modbus TCP interface; the second communication interface is an RS-485 interface.

[0008] Furthermore, the coordinated control command includes at least one of the following: a power scheduling command sent to the power conversion system PCS to control its charging and discharging power; a voltage regulation command or start / stop control command sent to the DC-DC converter DCDC.

[0009] Furthermore, the integrated control unit is connected to the DC-DC converter, air conditioner, and electricity meter via an RS485 bus.

[0010] Furthermore, the integrated control unit is used to monitor the total voltage, total current and contactor status of the battery cluster from the high-voltage box; and to monitor the operating status of the air conditioner and the power parameters from the electricity meter.

[0011] Furthermore, the high-voltage box is equipped with a main contactor for switching the circuit on and off, and the integrated control unit is used to send commands to the high-voltage box through a communication network to control the engagement and disengagement of the main contactor.

[0012] Furthermore, the integrated control unit communicates and exchanges data with the high-voltage box via a CAN bus.

[0013] Furthermore, a battery interface is provided between the DC-DC converter (DCDC) and the power conversion system (PCS) for connecting a battery.

[0014] Due to the adoption of the above technical solution, this utility model has the following advantages: it can improve the reliability and stability of the microgrid optical storage integrated cabinet system based on hybrid communication. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 A schematic diagram of a microgrid optical storage integrated cabinet system provided for an embodiment of this utility model; Figure 2A schematic diagram of another microgrid optical storage integrated cabinet system provided for an embodiment of this utility model. Detailed Implementation

[0017] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0018] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0019] See Figure 1 and Figure 2 This utility model provides an embodiment of a microgrid photovoltaic-storage integrated cabinet system, which includes a cabinet, and an integrated control unit, multiple DC-DC converters (DCDCs), and multiple power conversion systems (PCSs) disposed within the cabinet. The integrated control unit is configured to integrate the functions of a battery management unit (BAU) and an energy management unit (EMS), forming a two-in-one EMS. The integrated control unit is connected to each of the multiple DC-DC converters (DCDCs) and to each of the multiple power conversion systems (PCSs). Each DC-DC converter is used to boost the input photovoltaic DC power and output it to each power conversion system PCS and the battery cabinet connected to the battery interface through the integrated control unit. Each power conversion system (PCS) is used to convert the input DC power into AC power for use by the load.

[0020] Optionally, the integrated control unit is used to receive operating data from each DC-DC converter and each power conversion system (PCS), generate coordinated control commands based on the operating data, and send the coordinated control commands to each power conversion system (PCS) and DC-DC converter respectively, so as to perform integrated control of multiple power conversion system (PCS) and multiple DC-DC converters.

[0021] Optionally, the integrated control unit is connected to multiple power conversion systems (PCS) via a first communication interface and to multiple DC-DC converters (DCDC) via a second communication interface; the communication protocols of the first and second communication interfaces are independent of each other.

[0022] Optionally, the first communication interface is a CAN bus interface or a Modbus TCP interface; the second communication interface is an RS-485 interface.

[0023] Optionally, the coordinated control command includes at least one of the following: a power scheduling command sent to the power conversion system PCS to control its charging and discharging power; a voltage regulation command or start-stop control command sent to the DC-DC converter DCDC.

[0024] Optionally, the integrated control unit is connected to the DC-DC converter, air conditioner, and electricity meter via an RS485 bus.

[0025] Optionally, the integrated control unit is used to monitor the total voltage, total current and contactor status of the battery cluster from the high-voltage box; and to monitor the operating status of the air conditioner and the power parameters from the electricity meter.

[0026] Optionally, the high-voltage box is equipped with a main contactor for switching the circuit on and off, and the integrated control unit is used to send commands to the high-voltage box through a communication network to control the engagement and disengagement of the main contactor.

[0027] Optionally, the integrated control unit communicates and exchanges data with the high-voltage box via a CAN bus.

[0028] Optionally, a battery interface is provided between the DC-DC converter (DCDC) and the power conversion system (PCS) for connecting a battery.

[0029] Optionally, the integrated control unit communicates with the power conversion system PCS via a CAN bus to exchange information such as charging and discharging restrictions. The integrated control unit communicates with the high-voltage box via a CAN bus to exchange data. The integrated control unit communicates with the power conversion system PCS via a network cable using the Modbus TCP / IP communication protocol. The integrated control unit communicates with the DC-DC converter and the air conditioner meter via RS485 using the Modbus RTU communication protocol.

[0030] This invention reliably controls the various devices communicating with it through a local two-in-one EMS, monitors the data of the energy storage system, and automatically operates according to the corresponding operating logic.

[0031] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of protection of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the scope of protection of this utility model.

Claims

1. A microgrid optical storage integrated cabinet system, characterized in that, The system includes a cabinet, and an integrated control unit, multiple DC-DC converters (DCDCs), and multiple power conversion systems (PCSs) housed within the cabinet. The integrated control unit is configured to integrate the functions of a battery management unit (BAU) and an energy management unit (EMS), forming a two-in-one EMS. The integrated control unit is connected to each of the multiple DC-DC converters (DCDCs) and to each of the multiple power conversion systems (PCSs). Each DC-DC converter is used to boost the input photovoltaic DC power and output it to each power conversion system PCS and the battery cabinet connected to the battery interface through the integrated control unit. Each power conversion system (PCS) is used to convert the input DC power into AC power for use by the load.

2. The microgrid optical storage integrated cabinet system according to claim 1, characterized in that, The integrated control unit is used to receive operating data from each DC-DC converter and each power conversion system (PCS), generate coordinated control commands based on the operating data, and send the coordinated control commands to each power conversion system (PCS) and DC-DC converter respectively, so as to perform integrated control of multiple power conversion system (PCS) and multiple DC-DC converters.

3. The microgrid optical storage integrated cabinet system according to claim 1, characterized in that, The integrated control unit is connected to multiple power conversion systems (PCS) via a first communication interface and to multiple DC-DC converters (DCDC) via a second communication interface; the communication protocols of the first and second communication interfaces are independent of each other.

4. The microgrid optical storage integrated cabinet system according to claim 3, characterized in that, The first communication interface is a CAN bus interface or a Modbus TCP interface; the second communication interface is an RS-485 interface.

5. A microgrid optical storage integrated cabinet system according to claim 2, characterized in that, The coordinated control command includes at least one of the following: a power scheduling command sent to the power conversion system PCS to control its charging and discharging power; a voltage regulation command or start / stop control command sent to the DC-DC converter DCDC.

6. The microgrid optical storage integrated cabinet system according to claim 1, characterized in that, The integrated control unit is connected to the DC-DC converter, air conditioner, and electricity meter via an RS485 bus.

7. The microgrid optical storage integrated cabinet system according to claim 1, characterized in that, The integrated control unit is used to monitor the total voltage, total current and contactor status of the battery clusters from the high-voltage box; and to monitor the operating status of the air conditioner and the power parameters from the electricity meter.

8. A microgrid optical storage integrated cabinet system according to claim 7, characterized in that, The high-voltage box is equipped with a main contactor for switching the circuit on and off. The integrated control unit is used to send commands to the high-voltage box through a communication network to control the engagement and disengagement of the main contactor.

9. A microgrid optical storage integrated cabinet system according to claim 1, characterized in that, The integrated control unit communicates and exchanges data with the high-voltage box via a CAN bus.

10. A microgrid optical storage integrated cabinet system according to claim 1, characterized in that, A battery interface is provided between the DC-DC converter (DCDC) and the power conversion system (PCS) for connecting the battery.

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