Shore power supply system

Abstract

The utility model provides a shore power supply system, and belongs to the technical field of ship power supply. The ashore power supply system comprises a first voltage detection module, a first switch module, a photovoltaic power generation module and an inverter, the first end of the first switch module is used for being connected with a high-voltage terminal, the second end of the first switch module is connected with the photovoltaic power generation module, and the third end of the first switch module is connected with the first end of the inverter; the photovoltaic power generation module is configured to convert solar energy into electric energy; the second end of the inverter is used for being connected with a low-voltage wiring end, and the inverter is configured to convert high-voltage electricity into low-voltage electricity; the first voltage detection module is connected with the control end of the first switch module, the first voltage detection module is configured to detect the voltage output by the high-voltage wiring end, and the first switch module is configured to control the on-off state according to the signal output by the first voltage detection module. The investment amount of shore power construction can be saved, and the reliability and stability of ship power supply are improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ship power supply, and in particular to a shore power supply system. Background Art

[0002] Against the backdrop of an increasingly severe environmental crisis, China is advocating for port operators to install shore-based power systems at their terminals, encouraging ships at port to prioritize using shore-based power for energy, thereby shutting down auxiliary engines and preventing excessive emissions. However, traditional shore-based power systems are fixedly installed in distribution rooms. Powering ships requires re-construction of the infrastructure and laying of electrical lines, resulting in significant damage to the terminal's hydraulic structures, long construction times, and high operating costs. This has long been a major obstacle to the development of shore-based power systems in ports. Utility Model Content

[0003] The disclosed embodiments provide a shore power supply system to solve the problem that existing shore power systems require the reconstruction of civil infrastructure and the laying of electrical pipelines to supply power to ships, which causes serious damage to the dock hydraulic structure, has a long construction period and high operating costs.

[0004] The present disclosure provides a shore power system, which is mounted on a vehicle-mounted unit and includes:

[0005] A first voltage detection module, a first switch module, a photovoltaic power generation module and an inverter;

[0006] The first end of the first switch module is used to be connected to the high-voltage terminal, the second end of the first switch module is connected to the photovoltaic power generation module, and the third end of the first switch module is connected to the first end of the inverter; the photovoltaic power generation module is configured to convert solar energy into electrical energy;

[0007] The second end of the inverter is used to be connected to the low-voltage terminal, and the inverter is configured to convert high-voltage electricity into low-voltage electricity;

[0008] The first voltage detection module is connected to the control end of the first switch module. The first voltage detection module is configured to detect the voltage output by the high-voltage terminal. The first switch module is configured to control the switch state according to the signal output by the first voltage detection module.

[0009] In an exemplary embodiment of the present disclosure, the photovoltaic power generation module includes:

[0010] A photovoltaic panel, a second switching unit, an energy storage unit, and a second voltage detection unit;

[0011] A first end of the second switch unit is connected to the photovoltaic panel, and a second end of the second switch unit is connected to the energy storage unit;

[0012] The energy storage unit is connected to the second end of the first switch module;

[0013] The second voltage detection unit is connected to the control end of the second switch unit; the second voltage detection unit is configured to detect the voltage of the energy storage unit.

[0014] In an exemplary embodiment of the present disclosure, the shore power system further includes:

[0015] a third switch module;

[0016] A first end of the third switch module is connected to the energy storage unit, and a second end of the third switch module is used to connect to an external load;

[0017] The control end of the third switch module is connected to the second voltage detection unit.

[0018] In an exemplary embodiment of the present disclosure, the first voltage detection module includes:

[0019] voltage conversion unit;

[0020] The first end of the voltage conversion unit is used to be connected to the high-voltage terminal, and the second end of the voltage conversion unit is connected to the control end of the first switch module;

[0021] The voltage conversion module is configured to convert alternating current (AC) into direct current (DC).

[0022] In an exemplary embodiment of the present disclosure, the first voltage detection module further includes:

[0023] Filter unit;

[0024] The first end of the filter unit is connected to the second end of the voltage conversion unit, and the second end of the filter unit is connected to the control end of the first switch module.

[0025] In an exemplary embodiment of the present disclosure, the shore power system further includes:

[0026] Overcurrent protection module;

[0027] The first end of the overcurrent protection module is connected to the second end of the inverter, and the second end of the overcurrent protection module is used to be connected to the low-voltage terminal.

[0028] In an exemplary embodiment of the present disclosure, the photovoltaic power generation module further includes:

[0029] indicator lights;

[0030] The indicator light is arranged between the second switch unit and the energy storage unit.

[0031] The beneficial effects of the shore power supply system provided by the embodiment of the present disclosure are:

[0032] First, the shore power system provided by this disclosure is installed on an electric vehicle in a containerized form, reducing the construction period and associated costs of traditional shore power infrastructure. The electric vehicle can also travel between berths, meeting the power needs of ships at multiple berths and reducing the investment required for shore power construction.

[0033] Secondly, the present disclosure implements intelligent detection and response to the voltage at the high-voltage terminal by adding a first voltage detection module and a first switching module. When the voltage at the high-voltage terminal meets specific conditions, the first switching module automatically adjusts its on / off state, intelligently controlling the connection or disconnection of the photovoltaic power generation module. This intelligent control mechanism not only improves system safety and stability but also effectively optimizes energy utilization.

[0034] Finally, the present invention also integrates a photovoltaic power generation module that can directly convert solar energy into electricity, providing a green, clean, and sustainable energy source for the system. This design not only conforms to the global trend of renewable energy utilization, but also helps reduce dependence on traditional fossil energy, lower carbon emissions, and achieve the goals of environmental protection and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, 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 only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0036] Figure 1 is a structural diagram of a shore power supply system provided by an embodiment of the present disclosure;

[0037] Figure 2 2 is a schematic structural diagram of a shore power supply system provided in another embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0039] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including, but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0040] To address the issues mentioned in the background technology, this disclosure proposes a shore power system that reduces the construction period and associated costs of traditional shore power infrastructure. By utilizing existing cable lines and modifying ground-mounted junction boxes as shore power points, the system eliminates the need for new cable lines, which would damage existing dock structures. This reduces the high cost of cable materials and construction, and shortens the construction period.

[0041] The shore power system provided by the present disclosure is installed on an electric drive vehicle in the form of a container. The electric drive vehicle is equipped with a 50-meter cable and corresponding plug that matches the modified shore power socket box. The shore power system is equipped with electrical equipment components such as step-down and frequency conversion. Through voltage and frequency conversion technology, it can convert the high-voltage power supply on shore into power supply of different voltages and frequencies, thereby meeting the needs of most types of ship power systems.

[0042] The following describes the implementation of the present disclosure in detail with reference to the accompanying drawings:

[0043] Figure 1 This is a structural diagram of a shore power system 10 provided in an embodiment of the present disclosure. Figure 1 The shore power supply system 10 is mounted on a vehicle-mounted unit (not shown in the figure) and includes:

[0044] A first voltage detection module 11, a first switch module 12, a photovoltaic power generation module 13 and an inverter 14;

[0045] A first end of the first switch module 12 is connected to a high-voltage terminal, a second end of the first switch module 12 is connected to a photovoltaic power generation module 13, and a third end of the first switch module 12 is connected to a first end of an inverter 14. The photovoltaic power generation module 13 is configured to convert solar energy into electrical energy.

[0046] The second end of the inverter 14 is used to be connected to the low-voltage terminal, and the inverter 14 is configured to convert high-voltage electricity into low-voltage electricity;

[0047] The first voltage detection module 11 is connected to the control end of the first switch module 12. The first voltage detection module 11 is configured to detect the voltage output by the high-voltage terminal. The first switch module 12 is configured to control the switch state according to the signal output by the first voltage detection module 11.

[0048] In this embodiment, the first voltage detection module 11 can detect the voltage output by the high-voltage terminal (i.e., the shore high-voltage power input terminal) in real time. Based on the detected voltage value, it sends a control signal to the first switch module 12 to ensure safe and stable operation of the power supply system and make appropriate adjustments based on voltage conditions. The first voltage detection module 11 can be a voltage detection circuit, a sensor, or other device capable of issuing control signals.

[0049] The first switch module 12 can automatically adjust the switch state according to the signal output by the first voltage detection module 11, so as to realize flexible switching between the output voltage of the photovoltaic power generation module 13 and the high-voltage terminal. The first switch module 12 can be a relay switch or an electronic switch capable of receiving a control signal.

[0050] The photovoltaic power generation module 13 converts solar energy into electrical energy. As an auxiliary power supply module for the system, the photovoltaic power generation module 13 can provide power support to the system when the high-voltage power supply on shore is unavailable or the voltage is unstable, resulting in the output voltage being insufficient to power the ship, thereby improving the system's self-sufficiency and reliability.

[0051] The inverter 14 can convert the electric energy generated by the high-voltage power supply on shore or the photovoltaic power generation module 13 into low-voltage, specific-frequency electric energy suitable for use by ships through voltage and frequency conversion technology.

[0052] In this embodiment, the operating principle of the shore power system 10 is:

[0053] In general, the normally closed end of the first switch module 12 is the first end, that is, the shore power supply system 10 connects the high-voltage power supply on the shore to the system through the high-voltage terminal, and then, after voltage transformation and frequency conversion processing, converts the high-voltage power supply into a low-voltage power supply and outputs it to the ship through the low-voltage terminal. When the high-voltage power supply on the shore is suddenly unavailable or the output voltage value cannot meet the power supply needs of the ship, the first voltage detection module 11 can detect it in the first time, and at the same time control the first switch module 12 to connect the photovoltaic power generation module 13 to the power supply system, and the photovoltaic power generation module 13 supplies power to the ship. When the first voltage detection module 11 determines that the voltage value output by the high-voltage power supply on the shore has returned to the normal range, the photovoltaic power generation module 13 can be disconnected, and the high-voltage power supply can supply power to the ship.

[0054] For example, when the high-voltage power supply is sufficient, the output of the photovoltaic power generation module 13 can be reduced or stopped to avoid energy waste; and when the high-voltage power grid is insufficient or interrupted, the first switch module 12 can quickly switch to the photovoltaic power generation module 13 to ensure continuous power supply to the ship.

[0055] As can be seen from the above, the shore power system 10 provided by the present disclosure is installed on an electric vehicle in the form of a container, which reduces the construction period and corresponding costs of the civil engineering foundation of traditional shore power facilities. The electric vehicle can also travel between different berths, meeting the power supply needs of ships at multiple berths, saving the investment in shore power construction.

[0056] Secondly, the present disclosure implements intelligent detection and response to the voltage at the high-voltage terminal by adding a first voltage detection module 11 and a first switch module 12. There are multiple high-voltage terminals, one for each berth where a ship docks. When the voltage at the high-voltage terminal meets specific conditions, the first switch module 12 automatically adjusts its on / off state, intelligently controlling the connection or disconnection of the photovoltaic power generation module 13. This intelligent control mechanism not only improves the safety and stability of the system but also effectively optimizes energy utilization.

[0057] Finally, the present disclosure also integrates a photovoltaic power generation module 13, which can directly convert solar energy into electricity, providing a green, clean, and sustainable energy source for the system. This design not only conforms to the global trend of renewable energy utilization, but also helps reduce dependence on traditional fossil energy, lower carbon emissions, and achieve the goals of environmental protection and sustainable development.

[0058] In one embodiment of the present disclosure, the photovoltaic power generation module 13 includes:

[0059] Photovoltaic panel 131, second switch unit 132, energy storage unit 133 and second voltage detection unit 134;

[0060] A first end of the second switch unit 132 is connected to the photovoltaic panel 131 , and a second end of the second switch unit 132 is connected to a first end of the energy storage unit 133 ;

[0061] A second end of the energy storage unit 133 is connected to a second end of the first switch module 12 .

[0062] The second voltage detection unit 134 is connected to the control end of the second switch unit 132 ; the second voltage detection unit 134 is configured to detect the voltage of the energy storage unit 133 .

[0063] In this embodiment, photovoltaic panel 131 is the core component of photovoltaic power generation module 13. Its primary function is to directly convert solar energy into DC power. It is composed of multiple photovoltaic cells, each of which is a semiconductor photodiode that generates an electromotive force when exposed to sunlight, thereby outputting DC power.

[0064] The second voltage detection unit 134 can monitor the voltage status of the energy storage unit 133 in real time. This is a key link in ensuring the safe and stable operation of the energy storage unit 133, because excessively high or low voltages may damage the energy storage unit 133 and even affect its service life. By detecting the voltage of the energy storage unit 133, the second voltage detection unit 134 can promptly detect voltage anomalies and trigger corresponding safety protection mechanisms. For example, when it detects that the voltage exceeds the preset safety range, it can send a control signal to the second switch unit 132, causing the second switch unit 132 to disconnect from the energy storage unit 133, thereby preventing the occurrence of safety hazards such as overcharging.

[0065] In conjunction with the system's overall control strategy, the second voltage detection unit 134 can also participate in the system's intelligent regulation process. For example, when the photovoltaic panel 131 is generating sufficient electricity and the energy storage unit 133 is not fully charged, it can allow more electricity to flow into the energy storage unit 133. When the energy storage unit 133 is nearly fully charged, it can limit or stop the flow of electricity to optimize energy utilization and storage efficiency.

[0066] The second switch unit 132 controls the connection between the photovoltaic panel 131 and the energy storage unit 133. Based on system requirements, it can adjust whether the electrical energy generated by the photovoltaic panel 131 flows to the energy storage unit 133 for storage. For example, when the second voltage detection unit 134 detects that the voltage of the energy storage unit 133 has reached the rated voltage, the second switch unit 132 can be opened to prevent overcharging. When the voltage of the energy storage unit 133 is insufficient, the second switch unit 132 is closed, and the electrical energy generated by the photovoltaic power generation module 13 can be stored in the energy storage unit 133.

[0067] The energy storage unit 133 (such as a battery) is used to store the electrical energy generated by the photovoltaic panel 131 so as to ensure the stability and reliability of the ship's power supply when the high-voltage power supply is insufficient or fails.

[0068] In summary, the photovoltaic power generation module 13 converts solar energy into DC power through the photovoltaic panel 131 and controls the storage and release of power through the second switch unit 132, thereby providing stable and reliable power support for the system.

[0069] From the above, it can be concluded that the photovoltaic panel 131 can directly convert solar energy into electrical energy, and combined with the energy storage unit 133 to store electrical energy, ensure that the high-voltage power supply provides a reliable power supply to the system when a failure occurs or the voltage output is unstable, thereby enhancing the stability and reliability of the system.

[0070] In one embodiment of the present disclosure, the shore power system 10 further includes:

[0071] A third switch module 16;

[0072] A first end of the third switch module 16 is connected to the energy storage unit 133 , and a second end of the third switch module 16 is used to connect to an external load;

[0073] A control end of the third switch module 16 is connected to the second voltage detection unit 15 .

[0074] In this embodiment, the third switch module 16 has a first end connected to the energy storage unit 133 and a second end connected to an external load. The third switch module 16 is responsible for establishing and disconnecting the connection between the energy storage unit 133 and the external load. When the second voltage detection unit 15 detects that the energy storage unit 133 has been in a voltage saturation state for an extended period of time, it can send a control signal to the third switch module 16, causing it to disconnect from the external load. This releases the electrical energy in the energy storage unit 133 and extends its service life.

[0075] As can be seen from the above, the third switch module 16 can intelligently manage power output based on the voltage status of the energy storage unit 133, effectively preventing the energy storage unit 133 from being in a voltage saturation state for a long time, thereby preventing overcharging damage, ensuring the safety of the energy storage unit 133, and extending its service life. At the same time, it can also flexibly power external loads according to demand, improving the reliability and flexibility of the entire power system.

[0076] In one embodiment of the present disclosure, the first voltage detection module 11 includes:

[0077] voltage conversion unit 111;

[0078] The first end of the voltage conversion unit 111 is used to be connected to the high voltage terminal, and the second end of the voltage conversion unit 111 is connected to the control end of the first switch module 12;

[0079] The voltage conversion unit 111 is configured to convert alternating current (AC) into direct current (DC).

[0080] In this embodiment, a first end of the voltage conversion unit 111 is connected to a high-voltage terminal and is capable of receiving AC power from a high-voltage power source. A second end of the voltage conversion unit 111 is connected to a control terminal of the first switch module 12 and is capable of inputting a converted signal to the control terminal of the first switch module 12 to control the operating state of the first switch module 12.

[0081] It can be concluded from the above that the voltage conversion unit 111 can realize the conversion of high-voltage AC power to DC power, and by being directly connected to the first switch module 12 , it ensures that the converted signal can control the working state of the first switch module 12 .

[0082] In one embodiment of the present disclosure, the first voltage detection module 11 further includes:

[0083] Filter unit 112;

[0084] A first end of the filter unit 112 is connected to a second end of the voltage conversion unit 111 , and a second end of the filter unit 112 is connected to a control end of the first switch module 12 .

[0085] In this embodiment, the filtering unit 112 can filter the direct current output by the voltage conversion unit 111 to remove ripple and noise therein, ensuring that the voltage signal provided to the control end of the first switch module 12 is pure and stable, thereby improving the accuracy and reliability of voltage detection.

[0086] In one embodiment of the present disclosure, the shore power system 10 further includes:

[0087] Overcurrent protection module 16;

[0088] A first end of the overcurrent protection module 16 is connected to a second end of the inverter 14 , and a second end of the overcurrent protection module 16 is used to be connected to a low-voltage terminal.

[0089] In this embodiment, the overcurrent protection module 16 can monitor the current output by the inverter 14 to the low-voltage terminal. Once it detects that the current exceeds a preset safety threshold, it immediately takes measures (such as cutting off the circuit) to prevent the overcurrent from causing damage to system equipment, thereby protecting the safe and stable operation of the entire shore power system 10.

[0090] In one embodiment of the present disclosure, the photovoltaic power generation module 13 further includes:

[0091] Indicator light 135;

[0092] The indicator light 135 is disposed between the second switch unit 132 and the energy storage unit 133 .

[0093] In this embodiment, when the photovoltaic panel 131 outputs electric energy to the energy storage unit 133, the indicator light 134 lights up; when the second switch unit 132 disconnects the electric energy transmission between the photovoltaic panel 131 and the energy storage unit 133, the indicator light 135 goes out.

[0094] In one embodiment of the present disclosure, the shore power system 10 can convert 10kV / 50Hz shore power into four output voltages: 6.6kV / 60Hz, 6kV / 50Hz, 0.45kV / 60Hz, or 0.4kV / 50Hz, thus accommodating various types of marine power systems. In accordance with national standards, the system also includes a set of 350A high-voltage sockets and three sets of 350A and four sets of 250A low-voltage standard sockets to facilitate connection to various ship cable connectors.

[0095] This system allows shore power input to be drawn from a renovated high-voltage shore power outlet box at the dock's edge. Using the power plug and cable provided with the electric vehicle, the system can quickly connect the vehicle to the high-voltage shore power outlet box. The plugs and outlets must match perfectly. The system then uses voltage and frequency conversion technology to convert the shore's 10kV / 50Hz power to a type compatible with the vessel. Finally, the container's high-voltage / low-voltage outlet box connects to the vessel's incoming plug, providing power to the vessel. This system, mounted on an electric flatbed trolley, can be moved freely around the dock, meeting the power needs of vessels at each berth and enabling shore power usage at each berth.

[0096] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure 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 replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A shore power supply system, mounted on a vehicle-mounted unit, characterized in that: include: A first voltage detection module, a first switch module, a photovoltaic power generation module and an inverter; The first end of the first switch module is used to be connected to the high-voltage terminal, the second end of the first switch module is connected to the photovoltaic power generation module, and the third end of the first switch module is connected to the first end of the inverter; the photovoltaic power generation module is configured to convert solar energy into electrical energy; The second end of the inverter is used to be connected to the low-voltage terminal, and the inverter is configured to convert high-voltage electricity into low-voltage electricity; The first voltage detection module is connected to the control end of the first switch module. The first voltage detection module is configured to detect the voltage output by the high-voltage terminal. The first switch module is configured to control the switch state according to the signal output by the first voltage detection module.

2. The shore power system according to claim 1, characterized in that: The photovoltaic power generation module comprises: A photovoltaic panel, a second switching unit, an energy storage unit, and a second voltage detection unit; A first end of the second switch unit is connected to the photovoltaic panel, and a second end of the second switch unit is connected to the energy storage unit; The energy storage unit is connected to the second end of the first switch module; The second voltage detection unit is connected to the control end of the second switch unit; the second voltage detection unit is configured to detect the voltage of the energy storage unit.

3. The shore power system according to claim 2, wherein: Also includes: a third switch module; A first end of the third switch module is connected to the energy storage unit, and a second end of the third switch module is used to connect to an external load; The control end of the third switch module is connected to the second voltage detection unit.

4. The shore power system according to claim 1, wherein: The first voltage detection module includes: voltage conversion unit; The first end of the voltage conversion unit is used to be connected to the high-voltage terminal, and the second end of the voltage conversion unit is connected to the control end of the first switch module; The voltage conversion unit is configured to convert alternating current (AC) into direct current (DC).

5. The shore power system according to claim 4, characterized in that: The first voltage detection module further includes: Filter unit; The first end of the filter unit is connected to the second end of the voltage conversion unit, and the second end of the filter unit is connected to the control end of the first switch module.

6. The shore power system according to claim 1, wherein: Also includes: Overcurrent protection module; The first end of the overcurrent protection module is connected to the second end of the inverter, and the second end of the overcurrent protection module is used to be connected to the low-voltage terminal.

7. The shore power system according to claim 2, wherein: The photovoltaic power generation module further includes: indicator lights; The indicator light is arranged between the second switch unit and the energy storage unit.

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