Photovoltaic energy storage inversion device

Abstract

The utility model relates to the technical field of photovoltaic equipment, in particular to a photovoltaic energy storage inversion device, which comprises a control module, an energy storage inversion unit, a storage battery, a first isolation transformer, a distribution board, a second isolation transformer, a photovoltaic inversion module, a combiner box and a photovoltaic panel string. The storage battery is connected with the energy storage inversion unit, and the energy storage inversion unit is connected with the distribution board through the first isolation transformer. The photovoltaic panel string is connected with the combiner box, the combiner box is connected with the photovoltaic inversion module, and the photovoltaic inversion module is connected with the distribution board through the second isolation transformer. The control module is connected with the energy storage inversion unit and the photovoltaic inversion module. According to the photovoltaic energy storage inversion device, the electric energy generated by the photovoltaic side can be stored in the storage battery through the photovoltaic inversion unit in the daytime, and the electric energy stored in the storage battery can be transmitted to the distribution board through the photovoltaic inversion module at night, so that the electric energy is provided for the ship, and the energy consumption in the ship navigation process is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic equipment, and particularly relates to a photovoltaic energy storage inverter device. Background Art

[0002] With the continuous development of new energy technologies, the application of photovoltaic technology in the marine field has attracted more and more attention. Photovoltaic technology can convert solar energy into electrical energy, providing a clean and renewable energy source for ships, reducing dependence on traditional fossil fuels, lowering the operating costs of ships, reducing environmental pollution, and achieving the goal of sustainable development.

[0003] Photovoltaic power generation is the process of converting solar energy into electrical energy, and its output power varies drastically due to environmental factors such as solar radiation intensity and temperature. In addition, since the output of photovoltaic power is direct current, it needs to be converted into alternating current by an inverter before being connected to the power grid, and harmonics will be generated during the inversion process. The instability of photovoltaic power and the existence of harmonics will cause an impact on the power grid when photovoltaic power is connected to the grid. Summary of the Utility Model

[0004] The utility model provides a photovoltaic energy storage inverter device for the technical problems existing in the prior art, such as the unstable output power of the photovoltaic power supply system and the easy generation of harmonics during the inversion process, which will cause an impact on the power grid when photovoltaic power is connected to the grid.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A photovoltaic energy storage inverter device includes: a control module, an energy storage inverter unit, a storage battery, a first isolation transformer, a distribution board, a second isolation transformer, a photovoltaic inverter module, a busbar trunking system, and a photovoltaic panel string;

[0007] The storage battery is connected to the energy storage inverter unit, and the energy storage inverter unit is connected to the distribution board through the first isolation transformer;

[0008] The photovoltaic panel string is connected to the busbar trunking system, the busbar trunking system is connected to the photovoltaic inverter module, and the photovoltaic inverter module is connected to the distribution board through the second isolation transformer;

[0009] The control module is respectively connected to the energy storage inverter unit and the photovoltaic inverter module.

[0010] Further: it further includes: an HMI module; the HMI module is connected to and communicates with the control module.

[0011] Further: the control module includes: a first controller and a second controller;

[0012] The first controller is connected to and communicates with the energy storage and inverter unit;

[0013] The second controller is connected to and communicates with the photovoltaic inverter module.

[0014] Further: The HMI module includes: a first HMI device and a second HMI device;

[0015] The first HMI device is connected to and communicates with the first controller;

[0016] The second HMI device is connected to and communicates with the second controller.

[0017] Further: The first controller and the second controller are PLCs.

[0018] Further: The energy storage and inverter unit includes: a charging module and a power module;

[0019] The storage battery is connected to the power module, and the power module is connected to the distribution board through the first isolation transformer;

[0020] The distribution board is connected to the charging module through the first isolation transformer, and the charging module is connected to the storage battery.

[0021] The photovoltaic energy storage and inverter device provided by the present utility model has at least the following beneficial effects or advantages:

[0022] For the photovoltaic energy storage and inverter device provided by the present utility model, the storage battery is connected to the energy storage and inverter unit, and the energy storage and inverter unit is connected to the distribution board through the first isolation transformer. The photovoltaic panel string is connected to the busbar box, the busbar box is connected to the photovoltaic inverter module, and the photovoltaic inverter module is connected to the distribution board through the second isolation transformer. The control module is respectively connected to the energy storage and inverter unit and the photovoltaic inverter module. In this photovoltaic energy storage and inverter device, the energy storage and inverter unit and the photovoltaic inverter module are combined to form a complete photovoltaic energy storage and inverter device. In the whole system, the energy storage and inverter unit and the photovoltaic inverter module are independent and isolated from each other, yet inseparable. Through the photovoltaic energy storage and inverter device, during the navigation of the ship, during the day, the electric energy generated on the photovoltaic side can be stored in the storage battery through the photovoltaic inverter unit, and at night, the electric energy stored in the storage battery can be transmitted to the distribution board through the photovoltaic inverter module, thereby providing electric energy for the ship, thus greatly reducing the energy consumption during the navigation of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the photovoltaic energy storage and inverter device provided by the embodiment of the present utility model;

[0024] Figure 2 It is an electrical wiring diagram of the energy storage and inverter unit provided by the embodiment of the present utility model;

[0025] Figure 3 This is the electrical wiring diagram of the photovoltaic inverter module provided by the embodiment of the present utility model. Specific embodiments

[0026] In view of the technical problems existing in the prior art that the output power of the photovoltaic power supply system is unstable and harmonics are easily generated during the inversion process, resulting in an impact on the power grid when photovoltaic power is connected to the power grid, the present utility model provides a photovoltaic energy storage inverter device.

[0027] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0028] The embodiment of the present utility model provides a photovoltaic energy storage inverter device, which mainly includes: a control module, an energy storage inverter unit, a storage battery, a first isolation transformer, a distribution board, a second isolation transformer, a photovoltaic inverter module, a busbar box, and a photovoltaic panel string. Among them, the storage battery is connected to the energy storage inverter unit, and the energy storage inverter unit is connected to the distribution board through a first isolation transformer ( Figure 2 TF1 in which represents the first isolation transformer). The photovoltaic panel string is connected to the busbar box, and the busbar box is connected to the photovoltaic inverter module ( Figure 3 UPS2 in which represents the photovoltaic inverter module), and the photovoltaic inverter module is connected to the distribution board through a second isolation transformer ( Figure 3 TF2 in which represents the second isolation transformer). The control module is respectively connected to the energy storage inverter unit and the photovoltaic inverter module. The above "connection" is an electrical connection, which can realize the transmission of current.

[0029] In a preferred embodiment provided by the present utility model, the control unit includes a first controller and a second controller. Both the first controller and the second controller adopt PLC controllers. The first controller is connected to and communicates with the energy storage inverter unit, and the second controller is connected to and communicates with the photovoltaic inverter module. In this embodiment, independent controllers are provided for the energy storage inverter unit and the photovoltaic inverter module for control, which improves the accuracy of control. When a single controller fails, it does not affect the normal operation of the other controller.

[0030] In another preferred embodiment provided by the present utility model, there is an HMI module; the HMI module is connected to and communicates with the control module. The HMI module includes: a first HMI device and a second HMI device; the first HMI device is connected to and communicates with a first controller; the second HMI device is connected to and communicates with a second controller. By providing the HMI device, it is convenient to edit and modify the control parameters and control instructions of the controller.

[0031] The energy storage and inversion unit includes: a charging module and a power module; the storage battery is connected to the power module, and the power module is connected to the distribution board through a first isolation transformer. The distribution board is connected to the charging module through the first isolation transformer, and the charging module is connected to the storage battery. Among them, the charging module uses an MPS10020KT-C charging module, and the electrical connection diagram of the charging module is as Figure 2 shown, Figure 2 where U1 in Figure 2 represents the charging module. The power module uses a GPLPCS20KT power module, and the electrical connection diagram of the power module is as Figure 2 shown,

[0032] where UPS1 in

[0033] represents the power module. The storage battery can store the DC electric energy generated on the photovoltaic side through the energy storage and inversion unit, or convert the electric energy in the storage battery into alternating current for the ship to use through the energy storage and inversion unit. The working mode and various parameters of the energy storage and inversion unit can be set through the control module, and the control module can also receive the working status and various types of parameters of the power grid returned by the energy storage and inversion module in real time. The control module can be locally controlled through buttons or remotely controlled through communication with the HMI; there are not only virtual control buttons on the HMI to control the start and stop of the energy storage and inversion module and the switching of the working mode, but also a rich human-computer interaction interface to display the working status and various parameters of the energy storage and inversion module. Figure 3 shown, Figure 3 where UPS2 in

[0034] represents the photovoltaic inversion module. Multiple groups of photovoltaic panel strings are connected to the photovoltaic inversion module in parallel. The photovoltaic inversion module can convert the direct current generated by the photovoltaic panel strings into alternating current and connect it to the distribution board for daily use of the ship or store the electric energy through the energy storage and inversion module. An isolation transformer is also installed between the distribution board and the photovoltaic module to achieve bidirectional isolation of AC and DC.

[0035] In the photovoltaic energy storage and inversion device provided by the embodiment of the present utility model, the storage battery is connected to the energy storage and inversion unit, and the energy storage and inversion unit is connected to the distribution board through the first isolation transformer. The photovoltaic panel string is connected to the busbar box, the busbar box is connected to the photovoltaic inversion module, and the photovoltaic inversion module is connected to the distribution board through the second isolation transformer. The control module is respectively connected to the energy storage and inversion unit and the photovoltaic inversion module. In this photovoltaic energy storage and inversion device, the energy storage and inversion unit and the photovoltaic inversion module are combined to form a complete photovoltaic energy storage and inversion device. In the whole system, the energy storage and inversion unit and the photovoltaic inversion module are independent and isolated from each other, yet inseparable. Through the photovoltaic energy storage and inversion device, during the navigation of the ship, during the day, the electric energy generated on the photovoltaic side can be stored in the storage battery through the photovoltaic inversion unit, and at night, the electric energy stored in the storage battery can be delivered to the distribution board through the photovoltaic inversion module, thereby providing electric energy for the ship, and thus greatly reducing the energy consumption during the navigation of the ship.

[0036] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A photovoltaic energy storage inverter device, characterized in that: include: Control module, energy storage inverter unit, battery, first isolation transformer, distribution board, second isolation transformer, photovoltaic inverter module, combiner box and photovoltaic panel string; The storage battery is connected to the energy storage inverter unit, and the energy storage inverter unit is connected to the distribution board through the first isolation transformer; The photovoltaic panel string is connected to the combiner box, the combiner box is connected to the photovoltaic inverter module, and the photovoltaic inverter module is connected to the distribution board through the second isolation transformer; The control module is connected to the energy storage inverter unit and the photovoltaic inverter module respectively.

2. The photovoltaic energy storage inverter device according to claim 1, characterized in that: Also includes: HMI module; the HMI module is connected and communicates with the control module.

3. The photovoltaic energy storage inverter device according to claim 2, characterized in that: The control module includes: a first controller and a second controller; The first controller is connected to and communicates with the energy storage inverter unit; The second controller is connected to and communicates with the photovoltaic inverter module.

4. The photovoltaic energy storage inverter device according to claim 3 is characterized in that: The HMI module includes: a first HMI device and a second HMI device; The first HMI device is connected to and communicates with the first controller; The second HMI device is connected to and communicates with the second controller.

5. The photovoltaic energy storage inverter device according to claim 3, characterized in that: The first controller and the second controller are PLCs.

6. The photovoltaic energy storage inverter device according to claim 1, characterized in that: The energy storage inverter unit includes: a charging module and a power module; The storage battery is connected to the power module, and the power module is connected to the distribution board through the first isolation transformer; The distribution board is connected to the charging module through the first isolation transformer, and the charging module is connected to the battery.

Images