DC-side coupled photovoltaic storage integrated vehicle and control system

Abstract

The present invention proposes a DC-side coupled photovoltaic storage integrated carrier and a control device, which relates to the field of photovoltaic power generation technology. The DC-side coupled photovoltaic storage integrated carrier includes: a vehicle body, a DC-side coupled energy storage system installed on the vehicle body; an on-board distribution box installed on the vehicle body; the input end of the on-board distribution box is connected to the output end of the DC-side coupled energy storage system; a backup generator is installed on the vehicle body; the input end of the backup generator is connected to the output end of the DC-side coupled energy storage system. The movable DC-side coupled photovoltaic storage integrated carrier uses solar energy to charge the battery system and store electrical energy during the day; when solar energy is insufficient, the battery system supplies power to the load; when the battery is fully charged, it can be discharged to provide partial power to the carrier, and can also be used for peak shaving and valley filling in the photovoltaic power generation system, smoothing the power curve, etc.; when the battery energy is exhausted, a generator signal is sent to start the backup generator, and then the backup generator is switched to supply power.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic power generation, and in particular to a DC-side coupled photovoltaic storage integrated vehicle and a control device for a DC-side coupled photovoltaic storage integrated system. Background Art

[0002] The energy storage system of traditional photovoltaic power stations is fixed and cannot be moved. The operation mode is relatively simple and fixed, and there are not many application scenarios. In addition, the construction power supply or commissioning power supply of traditional photovoltaic power stations is an external power supply, which will cause certain pressure on the power grid. Summary of the invention

[0003] In view of the above problems, the present invention proposes a conveniently movable DC-side coupled photovoltaic storage integrated transport vehicle.

[0004] In a first aspect, a DC-side coupled photovoltaic storage integrated transport vehicle is provided, comprising:

[0005] Car body,

[0006] A DC-side coupled energy storage system installed on the vehicle body;

[0007] An on-board power distribution box is installed on the vehicle body; the input end of the on-board power distribution box is connected to the output end of the DC-side coupled energy storage system;

[0008] A standby generator is installed on the vehicle body; an input end of the standby generator is connected to an output end of the DC-side coupled energy storage system.

[0009] Furthermore, the output end of the vehicle-mounted power distribution box is connected to the power interface and the power-consuming equipment on the vehicle body.

[0010] Furthermore, the electrical equipment includes: fire-fighting equipment, sensors, air conditioners and electric doors.

[0011] Furthermore, the DC side coupled energy storage system comprises: an inverter module, a photovoltaic DC combiner box, a photovoltaic module, an energy storage DC converter and a battery system;

[0012] One end of the photovoltaic DC combiner box is connected to the photovoltaic module, and the other end is connected to one end of the inverter module;

[0013] One end of the energy storage DC converter is connected to the battery system, and the other end is connected to one end of the inverter module;

[0014] The other end of the inverter module is connected to the busbar.

[0015] Furthermore, the output voltage of the inverter module is 380V.

[0016] Furthermore, the battery system includes a plurality of battery clusters.

[0017] Furthermore, the photovoltaic assembly is arranged on the top of the vehicle body.

[0018] In a second aspect, a control device for a DC-side coupled photovoltaic storage integrated system is provided, characterized in that it includes a battery management device, an energy management system on-site monitoring device and a DC-side coupled energy storage system;

[0019] The battery management device, the energy management system on-site monitoring device and the DC side coupling energy storage system are interconnected in pairs and distributed in a triangle structure.

[0020] Furthermore, the battery management device is connected to the energy storage DC converter in the DC side coupled energy storage system; and the energy management system on-site monitoring device is connected to the inverter module in the DC side coupled energy storage system.

[0021] Furthermore, the on-site monitoring device of the energy management system is connected to the inverter module via a communication control device.

[0022] One or more technical solutions provided by this application have at least the following technical effects or advantages:

[0023] The mobile DC-side coupled photovoltaic storage integrated carrier uses solar energy to charge the battery system and store electrical energy during the day; when solar energy is insufficient, the battery system supplies power to the load; when the battery is fully charged, it can be discharged to provide partial power to the carrier, and can also be used for peak shaving and valley filling in the photovoltaic power generation system, smoothing the power curve, etc.; when the battery energy is exhausted, a generator signal is sent to start the backup generator, and then the power is switched to the backup generator.

[0024] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a DC-side coupled energy storage system in a DC-side coupled photovoltaic storage integrated vehicle provided in an embodiment of the present invention;

[0027] Figure 2A schematic diagram of the structure of a control device for a DC-side coupled photovoltaic energy storage integrated system provided in an embodiment of the present invention.

[0028] Among them, 1. Inverter module, 2. PV DC combiner box, 3. PV module, 4. Energy storage DC converter, 5. Battery system, 6. On-board power distribution box, 7. Backup generator;

[0029] 61. Power interface, 62. Power equipment;

[0030] 01. Battery management equipment, 02. Energy management system on-site monitoring equipment, 03. DC side coupled energy storage system, 04. Communication control equipment. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Figure 1 A schematic diagram of the structure of a DC-side coupled energy storage system in a DC-side coupled photovoltaic storage integrated transport vehicle provided in an embodiment of the present invention (the vehicle body is not shown in the figure). Figure 1 As shown, a DC-side coupled photovoltaic storage integrated transport vehicle according to an embodiment of the present invention specifically includes: a vehicle body, a DC-side coupled energy storage system 03, an onboard distribution box 6 and a backup generator 7; the DC-side coupled energy storage system 03, the onboard distribution box 6 and the backup generator 7 are all arranged on the vehicle body. The vehicle body has a power system and can move by its own power.

[0033] In a preferred embodiment, the DC-side coupled energy storage system 03 can be installed in a container, wherein the photovoltaic assembly 3 is arranged on the top outer surface of the container or retracted in the container, and when in use, it can be unfolded and extended outside the container. The container is equipped with a carrying platform, and wheels are arranged at the bottom of the carrying platform for connecting the carrying platform with the vehicle body and moving under the drive of the vehicle body.

[0034] The DC-side coupled energy storage system 03 is electrically connected to the vehicle body, which may be an electric vehicle, and uses the converted electric energy for the operation of the vehicle body. The DC-side coupled energy storage system 03 may also provide the converted electric energy to other electrical equipment 62 on the vehicle body, such as fire fighting equipment, sensors, air conditioners, and electric doors.

[0035] The vehicle body is an electric vehicle, which reduces costs and is more convenient to move than a gasoline vehicle, and does not require refueling. The battery system 5 can supply power to the electric vehicle when it is fully charged.

[0036] The DC side coupled energy storage system 03 and the vehicle-mounted power distribution box 6 transmit the electric energy generated by the DC side coupled energy storage system 03 to the vehicle-mounted power distribution box 6, and the power is distributed to each power-consuming device 62 through the vehicle-mounted power distribution box 6.

[0037] like Figure 1 The DC side coupled energy storage system 03 includes an inverter module 1, a photovoltaic DC junction box 2, a photovoltaic module 3, an energy storage DC converter 4 and a battery system 5; one end of the photovoltaic DC junction box 2 is connected to the photovoltaic module 3, and the other end is connected to one end of the inverter module 1; one end of the energy storage DC converter 4 is connected to the battery system 5, and the other end is connected to one end of the inverter module 1; the other end of the inverter module 1 is connected to the bus. Specifically, the DC input of the inverter module 1 (DC / AC) is connected to the output end of the photovoltaic DC / DC of the DC junction box and the energy storage DC converter 4, and the AC output end of the inverter module 1 (DC / AC) is connected to the 380V AC busbar.

[0038] The battery system 5 includes a plurality of battery clusters, and the plurality of battery clusters are connected in parallel to form the battery system 5 .

[0039] The vehicle-mounted power distribution box 6 and the standby generator 7 are both connected to the 380V AC busbar, and the output end of the vehicle-mounted power distribution box 6 is connected to the power interface 61 and the power equipment 62 on the vehicle body.

[0040] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0041] The mobile DC-side coupled photovoltaic storage integrated carrier uses solar energy to charge the battery system 5 during the day to store electrical energy; when solar energy is insufficient, the battery system 5 supplies power to the load; when the battery is fully charged, it can be discharged to provide partial power to the carrier, and can also be used for peak shaving and valley filling in the photovoltaic power generation system, smoothing the power curve, etc.; when the battery energy is exhausted, a generator signal is sent to start the standby generator 7, and then the standby generator 7 is switched to supply power.

[0042] Figure 2 A schematic diagram of the structure of a control device for a DC-side coupled photovoltaic storage integrated system provided in an embodiment of the present invention. A control device for a DC-side coupled photovoltaic storage integrated system comprises a battery management device (BMS) 01, an energy management system on-site monitoring device (EMU) 02 and a DC-side coupled energy storage system 03; the battery management device 01, the energy management system on-site monitoring device 02 and the DC-side coupled energy storage system 03 are interconnected in pairs and distributed in a triangular structure.

[0043] Specifically, the battery management device 01 is connected to the energy storage DC converter 4 in the DC side coupled energy storage system 03 ; the energy management system on-site monitoring device 02 is connected to the inverter module 1 in the DC side coupled energy storage system 03 .

[0044] The energy management system on-site monitoring device 02 is connected to the inverter module 1 in the DC-side coupled energy storage system 03 via the communication control device (EMS) 04 .

[0045] It should be noted that the inverter module 1 supports the combined operation of photovoltaic power generation, storage and diesel, single-machine operation, multi-machine parallel operation, and on-grid and off-grid operation.

[0046] The inverter module 1 collects the output / power generation of the photovoltaic power generation system, the maximum chargeable / dischargeable power / electricity / charge state of the energy storage DC converter 4, and the load power.

[0047] The inverter module 1 can be connected to the mains power and the standby generator 7 and control the start and stop of the mains power and the standby generator 7 .

[0048] The input side of the inverter module 1 includes: a photovoltaic DC combiner box 2 input, an energy storage DC converter 4 input, and a mains and standby generator 7 input.

[0049] The wiring mode of the inverter module 1 is bottom-in and bottom-out.

[0050] The internal control power supply of the inverter module 1 is self-generated and self-used, and the internal power supply is taken from the distribution box.

[0051] The energy management system on-site monitoring device (EMU) 02 and the battery management device (BMS) 01 are connected by communication to collect information of the battery system 5 and control the charging and discharging of the battery system 5.

[0052] Information uploading is divided into two parts: ① The information of the battery system 5 in the DC side coupled energy storage system 03 is sent to the battery management device (BMS) 01, and the battery management device (BMS) 01 sends the information to the energy management system on-site monitoring device (EMU) 02, and the energy management system on-site monitoring device (EMU) 02 sends the information to the communication control device (EMS) 04; ② The information of the photovoltaic module 3 is sent to the photovoltaic DC combiner box 2, and the photovoltaic DC combiner box 2 also sends the information to the communication control device (EMS) 04.

[0053] Control process: The communication control device (EMS) 04 receives the superior dispatch or sends the power information of the photovoltaic module 3 to the energy storage DC converter 4 according to actual needs. The energy storage DC converter 4 directly collects the real-time status of the battery system 5, makes judgments based on the power of the photovoltaic module 3 and the status of the battery system 5, and controls the charging and discharging of the DC-side coupled energy storage system 03.

[0054] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0055] It can exchange data bidirectionally for monitoring and control. The battery management device (BMS) 01 provides the energy management system on-site monitoring device (EMU) 02 with the basis for real-time DC-side coupled energy storage system 03 status monitoring, data storage, and strategy analysis; the battery management device (BMS) 01 transmits the alarm information to the energy management system on-site monitoring device (EMU) 02 in real time, providing the latter with a basis for charging and discharging.

[0056] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A DC-side coupled photovoltaic storage integrated vehicle, characterized in that: include: Car body, A DC-side coupled energy storage system (03) is installed on the vehicle body; An on-board power distribution box (6) is installed on the vehicle body; an input end of the on-board power distribution box (6) is connected to an output end of the DC-side coupled energy storage system (03); A standby generator (7) is installed on the vehicle body; an input end of the standby generator (7) is connected to an output end of the DC-side coupled energy storage system (03).

2. The DC-side coupled photovoltaic storage integrated vehicle according to claim 1, characterized in that: The output end of the vehicle-mounted power distribution box (6) is connected to the power interface (61) and the power equipment (62) on the vehicle body.

3. The DC-side coupled photovoltaic storage integrated vehicle according to claim 2, characterized in that: The electrical equipment (62) includes fire fighting equipment, sensors, air conditioners and electric doors.

4. The DC-side coupled photovoltaic storage integrated vehicle according to claim 1, characterized in that: The DC side coupled energy storage system (03) comprises: an inverter module (1), a photovoltaic DC junction box (2), a photovoltaic module (3), an energy storage DC converter (4) and a battery system (5); One end of the photovoltaic DC combiner box (2) is connected to the photovoltaic assembly (3), and the other end is connected to one end of the inverter module (1); One end of the energy storage DC converter (4) is connected to the battery system (5), and the other end is connected to one end of the inverter module (1); The other end of the inverter module (1) is connected to the busbar.

5. The DC-side coupled photovoltaic storage integrated vehicle according to claim 4, characterized in that: The output voltage of the inverter module (1) is 380V.

6. The DC-side coupled photovoltaic storage integrated vehicle according to claim 4, characterized in that: The battery system (5) includes a plurality of battery clusters.

7. The DC-side coupled photovoltaic storage integrated vehicle according to claim 4, characterized in that: The photovoltaic assembly (3) is arranged on the top of the vehicle body.

8. A control device for a DC-side coupled photovoltaic storage integrated system, characterized in that: It includes a battery management device (01), an energy management system on-site monitoring device (02) and a DC side coupled energy storage system (03); The battery management device (01), the energy management system on-site monitoring device (02) and the DC side coupling energy storage system (03) are interconnected in pairs and distributed in a triangle structure.

9. The control device of the DC-side coupled photovoltaic energy storage integrated system according to claim 8, characterized in that: The battery management device (01) is connected to the energy storage DC converter (4) in the DC side coupled energy storage system (03); and the energy management system on-site monitoring device (02) is connected to the inverter module (1) in the DC side coupled energy storage system (03).

10. The control device of the DC-side coupled photovoltaic energy storage integrated system according to claim 9, characterized in that: The energy management system on-site monitoring device (02) is connected to the inverter module (1) via a communication control device (04).

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