Ship shore power and new energy power supply collaborative ship power grid self-healing control system, method, medium, program product and terminal

Abstract

The application provides a ship shore power and new energy power supply collaborative ship power grid self-healing control system, method, medium, program product and terminal. The application realizes non-impact switching through the collaborative switching control of the ship shore power system and the new energy power supply, combines the power grid self-healing control module to quickly isolate faults and reconstruct the power supply network, cooperates with the multi-element energy storage module to collaboratively supply power, ensures the continuous power supply when the new energy is interrupted or fails, and improves the reliability of the ship power grid.

Description

Technical Field

[0001] This application relates to the field of ship power grid control technology, and in particular to a ship power grid self-healing control system, method, medium, program product and terminal for coordinated shore power and new energy power supply. Background Technology

[0002] Currently, ships need to connect to shore power when docked to reduce the operation of diesel generators (to reduce emissions). After leaving port, they rely on shipboard renewable energy sources (such as photovoltaic and wind power) and energy storage for power supply. However, there are differences in voltage and frequency between shore power and shipboard power grids. Direct switching can easily generate inrush current (which can reach 3-5 times the rated current), affecting the lifespan of equipment. At the same time, shipboard power grids are prone to local faults (such as short circuits and equipment overloads) due to fluctuations in renewable energy sources and aging lines. Traditional power grids lack rapid isolation and self-healing capabilities, and faults can easily spread to the entire ship. In addition, if extreme weather (such as rainstorms and typhoons) causes a sudden interruption of renewable energy sources, relying solely on energy storage for power supply may lead to power outages due to insufficient capacity, especially affecting critical equipment such as navigation and communication.

[0003] In existing technologies, shore power switching relies on manual synchronous operation (slow response and low accuracy), grid fault handling requires manual investigation (taking ≥30 minutes), and there is no multi-energy collaborative support after the interruption of new energy sources, making it difficult to meet the needs of ship power grids for "safe switching, fault self-healing, and reliable power supply".

[0004] Therefore, there is an urgent need for a system that can achieve smooth coordination between shore power and new energy sources, and self-healing of grid faults. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the present invention provides a ship power grid self-healing control system, method, medium, program product and terminal for ship shore power and new energy power supply coordination, which is used to solve at least one of the technical problems in the prior art.

[0006] To achieve the above and other related objectives, the first aspect of this application provides a shipboard power grid self-healing control system that coordinates shore power and renewable energy power supply. The shipboard power grid self-healing control system is communicatively connected to both the shipboard shore power system and the shipboard power grid. The system includes: a shore power access coordination module for accessing the shipboard shore power system and performing synchronous adjustment and switching operations based on the differences between the shore power system and the shipboard power grid; a shipboard renewable energy generation module for providing power to the shipboard power grid and collecting real-time operating status parameters of the renewable energy generation equipment; a multi-element energy storage module for storing energy and providing power to the shipboard power grid; a power grid status sensing module for acquiring real-time operating status parameters of the shipboard power grid and performing fusion analysis on these parameters to obtain state sensing data of the shipboard power grid; and a power grid self-healing control module for fault diagnosis based on the operating status parameters of the renewable energy generation equipment and the state sensing data of the shipboard power grid, obtaining corresponding self-healing strategies from a preset self-healing strategy library based on the fault diagnosis results, generating corresponding control commands based on the self-healing strategies, and performing fault repair based on the control commands.

[0007] In some embodiments of the first aspect of this application, the shore power access coordination module includes: a shore power interface unit for accessing the ship's shore power system and monitoring the shore power supply parameters of the ship's shore power system in real time; a synchronization adjustment unit for dynamically adjusting the shore power supply parameters of the ship's shore power system to synchronize with the voltage phase and frequency of the ship's power grid using digital phase-locked loop technology; and a switching execution unit for performing a switching operation after the ship's shore power system has been synchronized.

[0008] In some embodiments of the first aspect of this application, the shipborne new energy power generation module includes: a new energy power generation unit for providing electrical energy to the ship's power grid; and a new energy monitoring unit for collecting real-time operating status parameters of the new energy power generation equipment.

[0009] In some embodiments of the first aspect of this application, the system further includes a load management module; the load management module is used to receive control commands and dynamically schedule the ship's load according to the control commands.

[0010] To achieve the above and other related objectives, a second aspect of this application provides a self-healing control method for a ship power grid that coordinates shore power and renewable energy power supply. The method is characterized by being applied to a ship power grid self-healing control system that coordinates shore power and renewable energy power supply as described above. The method includes: a shore power / renewable energy coordinated operation phase, connecting to the ship's shore power system and performing synchronous adjustment and switching operations based on the differences between the ship's shore power system and the ship's power grid; a power grid fault self-healing phase, performing fault diagnosis based on the operating status parameters of the renewable energy power generation equipment and the state perception data of the ship's power grid, obtaining a corresponding self-healing strategy from a preset self-healing strategy library based on the fault diagnosis results, generating a corresponding control command based on the self-healing strategy, and performing fault repair based on the control command.

[0011] In some embodiments of the second aspect of this application, the shore power and new energy collaborative operation phase includes: during the berthing phase, the shore power interface unit connects to the ship's shore power system and monitors the shore power supply parameters of the ship's shore power system in real time; the synchronization adjustment unit dynamically adjusts the shore power supply parameters of the ship's shore power system to synchronize with the voltage phase and frequency of the ship's power grid; the switching execution unit performs a switching operation after the ship's shore power system is synchronized; during the departure phase, the shore power interface unit disconnects from the ship's shore power system, and the power grid self-healing control module sends control commands to the ship's new energy power generation module and / or multi-energy storage module to control the ship's new energy power generation module and / or multi-energy storage module to provide power to the ship's power grid.

[0012] In some embodiments of the second aspect of this application, the power grid fault self-healing stage includes: a partial short-circuit fault stage, in which the power grid state perception module acquires the operating status parameters of the ship's power grid in real time, and performs fusion analysis on the operating status parameters of the ship's power grid to obtain the state perception data of the ship's power grid; the power grid self-healing control module performs fault diagnosis based on the state perception data of the ship's power grid, and the fault diagnosis result includes the fault type being a short-circuit fault and the location of the fault branch line; and sends corresponding control commands to the ship's power grid according to the fault diagnosis result; and a sudden interruption of renewable energy stage, in which the shipborne renewable energy power generation module acquires the operating status parameters of the renewable energy power generation equipment in real time, and the power grid self-healing control module performs fault diagnosis based on the operating status parameters of the renewable energy power generation equipment, and the fault diagnosis result includes renewable energy supply interruption; and sends corresponding control commands to the shore power access coordination module or the multi-energy storage module according to the fault diagnosis result.

[0013] To achieve the above and other related objectives, a third aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a ship power grid self-healing control method for coordinating shore power and new energy power supply.

[0014] To achieve the above and other related objectives, a fourth aspect of this application provides a computer program product, which includes computer program code. When the computer program code is run on a computer, the computer enables the computer to implement the ship's power grid self-healing control method that coordinates shore power and new energy power supply.

[0015] To achieve the above and other related objectives, a fifth aspect of this application provides an electronic terminal, including a memory, a processor, and a computer program stored in the memory; the processor executes the computer program to implement the ship's power grid self-healing control method that coordinates shore power and new energy power supply.

[0016] As described above, the ship power grid self-healing control system, method, medium, program product, and terminal for coordinated shore power and new energy power supply provided in this application have the following beneficial effects:

[0017] (1) In this application, the process of switching between the ship shore power system and the new energy power supply is coordinated by the synchronous adjustment unit, which reduces the inrush current, extends the equipment life, and the voltage fluctuation is small during the switching process, thus avoiding damage to sensitive equipment due to voltage surge.

[0018] (2) This application effectively enhances the self-healing capability of the ship's power grid through the power grid status sensing module and the power grid self-healing control module, optimizes the ship's power grid fault from the traditional manual troubleshooting method to the automatic fault identification and isolation method, shortens the fault handling time and reduces the fault propagation rate, and achieves rapid power supply recovery response and ensures continuous and stable power supply to the ship's load after the interruption of new energy power supply.

[0019] (3) When the ship is in berthing condition, the ship shore power system and the new energy power supply work together to reduce the energy consumption of the ship shore power system. When the ship is in sailing condition, the new energy and the multi-energy storage module work together to improve the local consumption capacity of new energy and reduce the ineffective charging and discharging behavior of the multi-energy storage module, thereby improving the overall energy utilization efficiency and the economic benefits of system operation.

[0020] (4) This application enables the use of load priority management and multi-element energy storage to provide stable power support for high-priority primary and secondary loads under extreme conditions. This not only meets the continuous power supply needs of ships during emergency return to port, but also effectively extends the ship's operating time. Attached Figure Description

[0021] Figure 1 The diagram shown is a structural schematic of a ship power grid self-healing control system that coordinates shore power and new energy power supply in one embodiment of this application.

[0022] Figure 2The diagram shown is a structural schematic of a shore power access coordination module according to an embodiment of this application.

[0023] Figure 3 The diagram shown is a structural schematic of a shipborne new energy power generation module according to an embodiment of this application.

[0024] Figure 4 The diagram shown is a structural schematic of another ship power grid self-healing control system that coordinates shore power and new energy power supply in one embodiment of this application.

[0025] Figure 5 The diagram shown is a flowchart illustrating a ship power grid self-healing control method that coordinates shore power and new energy power supply in one embodiment of this application.

[0026] Figure 6 The diagram shown is a structural schematic of an electronic terminal according to an embodiment of this application. Detailed Implementation

[0027] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0028] In the embodiments of this application, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" do not necessarily imply that they are different.

[0029] It should be noted that, in the embodiments of this application, the words "exemplary" or "for example" indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0030] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0031] Before providing a further detailed description of the present invention, the nouns and terms used in the embodiments of the present invention are explained, and the nouns and terms used in the embodiments of the present invention are subject to the following interpretations:

[0032] <1> Digital phase-locked loop (PLL) technology is an electronic circuit system that uses feedback control principles to achieve automatic phase and frequency synchronization. Its core function is to enable the output signal frequency and phase of the internal voltage-controlled oscillator to accurately track the external input reference signal.

[0033] <2> SOC (State of Charge): This is an important parameter in the field of electrochemical energy storage. It refers to the percentage of actual charge in the energy storage medium relative to the rated energy storage capacity, directly reflecting the remaining capacity of the battery.

[0034] <3> SOH (State of Health): An indicator describing the health and lifespan of a battery. It is used to characterize the current performance of the battery compared to its performance when it was brand new, reflecting the degree of battery aging.

[0035] This application provides a ship power grid self-healing control system that coordinates shore power and renewable energy power supply. It achieves shock-free switching through coordinated switching control between the ship shore power system and renewable energy power supply. Combined with the power grid self-healing control module, it quickly isolates faults and reconstructs the power supply network. With the help of multi-energy storage modules, it ensures continuous power supply when renewable energy is interrupted or fails, thereby improving the reliability of the ship power grid.

[0036] To facilitate understanding of the embodiments of this application, firstly, in conjunction with Figure 1 Detailed explanation. Figure 1This invention illustrates a schematic diagram of a shipboard power grid self-healing control system that integrates shore power and renewable energy supply in an embodiment of the present invention. In this embodiment, the shipboard power grid self-healing control system 100 is communicatively connected to both the shipboard shore power system 200 and the shipboard power grid 300. The shipboard power grid self-healing control system 100 mainly includes: a shore power access coordination module 110, a shipboard renewable energy generation module 120, a multi-element energy storage module 130, a power grid status sensing module 140, and a power grid self-healing control module 150. The shore power access coordination module 110 is connected to the shipboard shore power system 200, the power grid status sensing module 140 is connected to the shipboard power grid 300, the shore power access coordination module 110 is connected to the power grid status sensing module 140, and the power grid self-healing control module 150 is connected to the shore power access coordination module 110, the shipboard renewable energy generation module 120, the multi-element energy storage module 130, and the power grid status sensing module 140.

[0037] The shore power access coordination module 110 is used to access the ship's shore power system 200 and to perform synchronous adjustment and switching operations based on the differences between the ship's shore power system 200 and the ship's power grid 300.

[0038] In this embodiment, as Figure 2 As shown, the shore power access coordination module 110 includes: a shore power interface unit 111, a synchronization adjustment unit 112, and a switching execution unit 113; the shore power interface unit 111 is connected to the synchronization adjustment unit 112, and the synchronization adjustment unit 112 is connected to the switching execution unit 113.

[0039] Among them, such as Figure 2 As shown, the shore power interface unit 111 is used to connect to the ship's shore power system 200 and monitor the shore power supply parameters of the ship's shore power system in real time. The shore power interface unit 111 includes, but is not limited to, a voltage sensor, a frequency sensor, an isolation transformer, and a filter device. The shore power interface unit is used to connect to the ship's shore power system in the port and obtains the shore power supply parameters of the ship's shore power system in real time through voltage and frequency sensors. The shore power supply parameters of the ship's shore power system include at least one of shore power voltage, frequency, and harmonic content. Optionally, the sampling frequency of the voltage sensor and frequency sensor is set to 2kHz, and the capacity of the isolation transformer is matched to the rated power of the ship.

[0040] like Figure 2 As shown, the synchronization adjustment unit 112 is used to dynamically adjust the shore power supply parameters of the ship's shore power system to be synchronized with the voltage phase and frequency of the ship's power grid through digital phase-locked loop technology.

[0041] Specifically, digital phase-locked loop (PLL) technology is used to acquire the voltage phase and frequency of the shore power supply parameters of the ship's shore power system. The voltage phase difference and frequency difference between the ship's shore power system and the ship's power grid are calculated, and the voltage phase and frequency of the ship's shore power system are dynamically adjusted to ensure that the voltage phase and frequency differences between the ship's shore power system and the ship's power grid meet preset accuracy requirements, thus achieving synchronization between the voltage phase and frequency of the shore power supply parameters of the ship's shore power system and the voltage phase and frequency of the ship's power grid. The preset accuracy requirements can be set to a voltage phase difference control accuracy ≤ 0.5° and a frequency difference control accuracy ≤ 0.1Hz. The synchronization adjustment unit 112 includes an AC / AC converter, which dynamically adjusts the output of the shore power supply parameters of the ship's shore power system to maintain parameter consistency between the ship's shore power system and the ship's power grid.

[0042] like Figure 2 As shown, the switching execution unit 113 is used to perform a switching operation after the ship's shore power system has been synchronized. The switching execution unit 113 includes a bidirectional intelligent circuit breaker and a buffer circuit. When the ship's shore power system is synchronized, the switching operation ensures that the inrush current during switching is less than or equal to 1.2 times the rated current.

[0043] The shipborne new energy power generation module 120 is used to provide power to the ship's power grid and to collect the operating status parameters of the new energy power generation equipment in real time.

[0044] In this embodiment, as Figure 3 As shown, the shipborne new energy power generation module 120 includes: a new energy power generation unit 121 and a new energy monitoring unit 122. The new energy power generation unit 121 is used to provide electrical energy to the ship's power grid; the new energy monitoring unit 122 is used to collect real-time operating status parameters of the new energy power generation equipment. Specifically, the new energy power generation unit 121 includes, but is not limited to, new energy power generation devices such as photovoltaic power generation and wind power generation, such as deck photovoltaic arrays and rooftop wind turbines. Each generator or power generation device is connected to the ship's power grid to transmit electrical energy. Specifically, the shipborne DC bus connected to the ship's power grid via a DC / DC converter supplies power to high-power loads on the ship (such as air conditioning and propulsion auxiliary systems). In this embodiment, the power generation method in the new energy power generation unit 121 is not limited and is set according to actual needs.

[0045] The new energy monitoring unit 122 collects real-time operational status parameters of the ship's new energy power generation equipment, such as output power and fault status. Fault status includes issues such as photovoltaic panel shading and wind turbine malfunction. The new energy power generation equipment includes deck photovoltaic arrays and rooftop wind turbines.

[0046] The multi-energy storage module 130 is used to store electrical energy and provide power to the ship's electrical grid. The multi-energy storage module 130 adopts a hybrid energy storage architecture, which can adapt to different power supply needs. The multi-energy storage module 130 can improve the safety and stability of the ship's electrical grid system and can also serve as a temporary emergency power source for the ship's electrical grid.

[0047] The hybrid energy storage architecture includes a supercapacitor, a lithium battery, and a flywheel energy storage device. The supercapacitor stores the electrical energy of the renewable energy generation unit and is connected to the DC bus of the ship's power grid via a bidirectional DC / DC converter. It can absorb switching shocks or support instantaneous power (such as during load surges). The lithium battery is also connected to the DC bus of the ship's power grid via a bidirectional DC / DC converter to provide emergency continuous power supply during short-term interruptions in renewable energy generation. The flywheel energy storage device is connected to the AC bus of the ship's power grid via a bidirectional AC / DC converter to perform rapid frequency regulation during frequency fluctuations in the ship's power grid, thereby maintaining frequency stability.

[0048] The multi-element energy storage module 130 also includes an energy storage management unit. This unit monitors the SOC, SOH, and other status parameters of each energy storage device in the hybrid energy storage architecture in real time, and compares these real-time collected status parameters with preset protection thresholds to perform charging and discharging protection. For example, discharging is stopped when SOC ≤ 10%, and charging is stopped when SOC ≥ 90%.

[0049] It should be noted that in this application, the ship's power grid is connected to the ship's new energy power generation module and the multi-source energy storage module to form a power supply architecture with multiple power sources and energy storage regulation, and control commands are sent to the ship's new energy power generation module and the multi-source energy storage module to achieve multi-source coordinated regulation.

[0050] The power grid status sensing module 140 is used to acquire the operating status parameters of the ship's power grid 300 in real time. The module employs a monitoring method combining distributed fiber optic sensing and smart meters to acquire these parameters. Distributed fiber optic sensors are laid along the main bus and branch lines of the ship's power grid to collect parameters such as line temperature, vibration levels, and insulation resistance. Vibration levels can be used to identify short circuits in advance, and insulation resistance values ​​can provide early warnings of leakage. Smart meters are installed at the load input and power output terminals of the ship's power grid to collect real-time current, voltage, and power parameters. These parameters can be used to calculate line power loss, which can be used to determine if there is an overload.

[0051] Furthermore, the power grid status sensing module 140 also includes a status fusion unit. This unit fuses and analyzes the collected operating status parameters of the ship's power grid to obtain status sensing data. Specifically, it collects real-time parameters such as current, voltage, and power. These parameters can be used to calculate line power loss, which is the status sensing data of the ship's power grid. Overload can be determined by analyzing the line power loss. The final obtained status sensing data of the ship's power grid can be used for subsequent fault diagnosis, including normal operation, early warning, and fault conditions, thereby improving the accuracy of fault diagnosis. The fault types corresponding to the fault diagnosis results include branch line short circuits, main bus overload, voltage dips, and renewable energy supply interruptions.

[0052] The power grid self-healing control module 150 is used to perform fault diagnosis based on the operating status parameters of the new energy power generation equipment and the status perception data of the ship's power grid, obtain the corresponding self-healing strategy from the preset self-healing strategy library according to the fault diagnosis results, generate the corresponding control command according to the self-healing strategy, and perform fault repair based on the control command.

[0053] It should be noted that fault diagnosis based on the operating status parameters of new energy power generation equipment and the status perception data of the ship's power grid can locate the fault point and determine the fault type. Fault types include, but are not limited to: branch line short circuit, main bus overload, voltage drop, and new energy power outage. The preset self-healing strategy library includes, but is not limited to: fault isolation strategy, which isolates the fault by disconnecting the upstream and downstream smart circuit breakers; load transfer strategy, which switches the load in the fault area to the backup line; and power coordination strategy, which controls the use of multi-energy storage modules or shore power access coordination modules for supplementary power supply. The preset self-healing strategy library includes self-healing strategies corresponding to each fault type, which are set according to actual needs and are not limited here.

[0054] After acquiring the corresponding self-healing strategy, control commands are generated and sent to the multi-energy storage module, shore power access coordination module, or shipborne renewable energy generation module for fault repair. For example, when renewable energy equipment in the shipborne renewable energy generation module is interrupted or malfunctions, control commands are sent to the shore power access coordination module to supplement power supply when the ship is docked, or control commands are sent to the multi-energy storage module to supplement power supply, thereby repairing the power outage fault and ensuring uninterrupted power supply to the ship's critical loads.

[0055] In one embodiment of this application, as Figure 4 As shown, the system 100 further includes a load management module 160; the load management module 160 is used to receive control commands and dynamically schedule the ship load according to the control commands.

[0056] Specifically, the load management module includes a load classification unit and a dynamic scheduling unit. The load classification unit is used to classify the ship's load into primary load, secondary load, and tertiary load; wherein, primary load includes: navigation system, communication equipment, and emergency lighting; secondary load includes: propulsion auxiliary system and fire-fighting equipment; and tertiary load includes: air conditioning and entertainment equipment.

[0057] The dynamic scheduling unit receives control commands and prioritizes power supply to primary and secondary loads when the ship's electrical grid is insufficient, while temporarily disconnecting power to tertiary loads. After the ship's electrical grid power is restored, power is gradually restored according to load priority. Specifically, the power outage tolerance time for primary loads is ≤50ms, for secondary loads it is ≤500ms, and tertiary loads can be directly disconnected. Therefore, the load priority order is: primary loads are powered first, followed by secondary loads, and tertiary loads are powered last. Temporary power outages for tertiary loads are achieved by disconnecting their power supply interface using a smart circuit breaker.

[0058] Figure 5 This is a schematic block diagram of a shipboard power grid self-healing control method for coordinated shore power and renewable energy supply, provided in an embodiment of this application. The shipboard power grid self-healing control method for coordinated shore power and renewable energy supply is applied to the shipboard power grid self-healing control system described above. Figure 5 As shown, the method includes:

[0059] Step S51: In the shore power and new energy collaborative operation phase, the ship's shore power system is connected, and synchronous adjustment and switching operations are performed based on the differences between the ship's shore power system and the ship's power grid.

[0060] In one embodiment of this application, the shore power renewable energy collaborative operation phase includes:

[0061] During the port call phase, the shore power interface unit connects to the ship's shore power system and monitors the shore power supply parameters of the ship's shore power system in real time; the synchronization adjustment unit dynamically adjusts the shore power supply parameters of the ship's shore power system to synchronize with the voltage phase and frequency of the ship's power grid; the switching execution unit performs the switching operation after the ship's shore power system is synchronized.

[0062] Specifically, when a ship docks at a port, the shore power access coordination module is activated, the shore power interface unit connects to the ship's shore power system, and the synchronization adjustment unit aligns the shore power supply parameters of the ship's shore power system with the voltage phase and frequency of the ship's power grid. The alignment conditions are a voltage phase difference ≤ 0.5° and a frequency difference ≤ 0.1Hz. Then, the switching execution unit closes the circuit breaker, and the inrush current during the final switching is ≤ 1.2 times the rated current. At this time, new energy power generation equipment (such as photovoltaics) prioritizes power supply to local loads, and excess power is stored in energy storage devices such as lithium batteries. The ship's shore power system can supplement the remaining power supply demand.

[0063] During the departure voyage, the shore power interface unit is disconnected from the ship's shore power system. The grid self-healing control module sends control commands to the ship's new energy power generation module and / or multi-energy storage module to control the ship's new energy power generation module and / or multi-energy storage module to provide power to the ship's grid.

[0064] Specifically, when a ship departs from port, the shore power interface unit disconnects from the ship's shore power system, meaning the ship's shore power system is disconnected from the ship's electrical grid. The grid self-healing control module sends control commands to ensure that the ship's onboard renewable energy generation module is the primary power source, with multi-energy storage modules serving as auxiliary or emergency power sources. For example, supercapacitors can control the instantaneous power fluctuations of renewable energy generation equipment to ≤5%, preventing damage to the ship's electrical equipment. Flywheel energy storage devices maintain the AC bus frequency at 50Hz±0.1Hz, ensuring the normal operation of frequency-sensitive equipment such as navigation, communication, and auxiliary machinery. Lithium batteries provide power when the renewable energy generation equipment is insufficient, continuously ensuring power supply to the ship's load.

[0065] Step S52: In the grid fault self-healing stage, fault diagnosis is performed based on the operating status parameters of the new energy power generation equipment and the operating status parameters of the ship's power grid. According to the fault diagnosis results, the corresponding self-healing strategy is obtained from the preset self-healing strategy library, and the corresponding control command is generated according to the self-healing strategy.

[0066] In one embodiment of this application, the power grid fault self-healing stage includes:

[0067] During the partial short-circuit fault phase, the power grid status perception module acquires the operating status parameters of the ship's power grid in real time and performs fusion analysis on the operating status parameters of the ship's power grid to obtain the status perception data of the ship's power grid. The power grid self-healing control module performs fault diagnosis based on the status perception data of the ship's power grid. The fault diagnosis results include the fault type as a short-circuit fault and the location of the fault branch. Based on the fault diagnosis results, the module sends corresponding control commands to the ship's power grid.

[0068] Specifically, when the power grid status sensing module detects a sudden rise in line temperature through fiber optic sensors, the status fusion unit performs fusion analysis based on operating status parameters to obtain the status sensing data of the ship's power grid, that is, it calculates the instantaneous temperature rise based on the sudden rise in line temperature. The power grid self-healing control module determines that there is a short circuit fault based on the instantaneous temperature rise and locates the faulty branch line. It sends control commands to the smart circuit breakers at both ends of the faulty branch line to control the disconnection to isolate the fault. At the same time, it controls the adjacent smart circuit breakers to close and transfer the ship's load on the faulty branch line to the backup branch line, so that the power supply to the current ship's load is not interrupted.

[0069] During a sudden interruption of renewable energy supply, the shipborne renewable energy power generation module collects the operating status parameters of the renewable energy power generation equipment in real time. The grid self-healing control module performs fault diagnosis based on the operating status parameters of the renewable energy power generation equipment. The fault diagnosis results include renewable energy supply interruption. Based on the fault diagnosis results, the module sends corresponding control commands to the shore power access coordination module or the multi-energy storage module.

[0070] For example, when a typhoon causes wind power to shut down, resulting in a sudden interruption of renewable energy, the renewable energy monitoring unit of the shipboard renewable energy power generation module detects the renewable energy power outage parameters. The grid self-healing control module calculates the power gap value of the ship's power grid based on the renewable energy power outage parameters. For example, the rated power of the wind power generation equipment is 150kW, and a power gap value of 150kW is formed after the wind power generation equipment is cut off.

[0071] When the vessel is docked in port, the grid self-healing control module sends control commands to the shore power access coordination module to enable the ship's shore power system to provide 150kW of power. Dynamic power matching and adjustment are then achieved through the synchronization regulation unit to compensate for grid power shortages in real time. When the vessel is at sea, the grid self-healing control module sends control commands to the multi-energy storage module to control the lithium battery to release 100kW of power and the supercapacitor to supplement 50kW of power. Simultaneously, it sends control commands to the load management module to control the disconnection of tertiary loads to reduce power demand.

[0072] In one embodiment of this application, the control method further includes a shore power switching transition phase, which includes a pre-departure switching phase and a docking switching phase.

[0073] Specifically, the pre-departure switching phase refers to the conversion of the ship's shore power system to shipboard renewable energy generation. The grid self-healing control module sends control commands to the shipboard renewable energy generation module at a pre-set time to control the renewable energy generation equipment to increase its output while simultaneously reducing the output of the ship's shore power system. The switching execution unit disconnects the ship's shore power system circuit breaker. During the switching process, voltage fluctuations are small and there is almost no impact.

[0074] The switching phase during docking refers to the conversion of shipboard renewable energy generation to ship-to-shore power supply. The grid self-healing control module sends control commands to the shore power access coordination module, and the ship's grid is connected to the ship's shore power system through the shore power interface unit. The output of the ship's shore power system is gradually increased until it meets the ship's load requirements, while the output of renewable energy generation equipment is reduced simultaneously. During the switching process, power fluctuations are buffered by supercapacitors to ensure the stability of the ship's load voltage.

[0075] Experiments have shown that the ship shore power system of this application, through the synchronous adjustment unit, reduces the inrush current from 3-5 times the rated current to less than 1.2 times, extends the equipment life by more than 20%, and reduces the voltage fluctuation during the switching process to ≤±2%, thereby avoiding damage to sensitive equipment (such as navigation instruments) due to voltage surges.

[0076] It should be emphasized that the shipboard power grid self-healing control system, method, medium, program product and terminal for coordinated shore power and new energy power supply provided in this application have the following beneficial effects:

[0077] (1) In this application, the process of switching between the ship shore power system and the new energy power supply is coordinated by the synchronous adjustment unit, which reduces the inrush current, extends the equipment life, and the voltage fluctuation is small during the switching process, thus avoiding damage to sensitive equipment due to voltage surge.

[0078] (2) This application effectively enhances the self-healing capability of the ship's power grid through the power grid status sensing module and the power grid self-healing control module, optimizes the ship's power grid fault from the traditional manual troubleshooting method to the automatic fault identification and isolation method, shortens the fault handling time and reduces the fault propagation rate, and achieves rapid power supply recovery response and ensures continuous and stable power supply to the ship's load after the interruption of new energy power supply.

[0079] (3) When the ship is in berthing condition, the ship shore power system and the new energy power supply work together to reduce the energy consumption of the ship shore power system. When the ship is in sailing condition, the new energy and the multi-energy storage module work together to improve the local consumption capacity of new energy and reduce the ineffective charging and discharging behavior of the multi-energy storage module, thereby improving the overall energy utilization efficiency and the economic benefits of system operation.

[0080] (4) This application enables the use of load priority management and multi-element energy storage to provide stable power support for high-priority primary and secondary loads under extreme conditions. This not only meets the continuous power supply needs of ships during emergency return to port, but also effectively extends the ship's operating time.

[0081] It should be understood that the specific process of each module performing the above-mentioned steps has been described in detail in the above method embodiments, and will not be repeated here for the sake of brevity.

[0082] It should also be understood that the module division in the embodiments of this application is illustrative and only represents a logical functional division; in actual implementation, there may be other division methods. Furthermore, the functional modules in the various embodiments of this application can be integrated into a single processor, exist as separate physical entities, or be integrated into a single module. The integrated modules described above can be implemented in hardware or as software functional modules.

[0083] Figure 6 This is a schematic block diagram of the electronic terminal provided in an embodiment of this application. Figure 6 As shown, the electronic terminal 600 includes at least one processor 601, a memory 602, at least one network interface 603, and a user interface 605. The various components in the electronic terminal 600 are coupled together via a bus system 604. It is understood that the bus system 604 is used to implement communication between these components. In addition to a data bus, the bus system 604 also includes a power bus, a control bus, and a status signal bus. However, for clarity, in… Figure 6 The general will label all buses as bus systems.

[0084] The user interface 605 may include a monitor, keyboard, mouse, trackball, clicker, button, touchpad, or touch screen.

[0085] It is understood that memory 602 can be volatile memory or non-volatile memory, or both. Non-volatile memory can be read-only memory (ROM) or programmable read-only memory (PROM), which serves as an external cache. By way of example, but not limitation, many forms of RAM are available, such as static random access memory (SRAM) and synchronous static random access memory (SSRAM). The memories described in the embodiments of this invention are intended to include, but are not limited to, these and any other suitable categories of memory.

[0086] In this embodiment of the invention, the memory 602 is used to store various types of data to support the operation of the electronic terminal 600. Examples of this data include: any executable program for operation on the electronic terminal 600, such as the operating system 6021 and application program 6022; the operating system 6021 contains various system programs, such as the framework layer, core library layer, driver layer, etc., for implementing various basic services and handling hardware-based tasks. The application program 6022 may contain various applications, such as media players, browsers, etc., for implementing various application services. The ship power grid self-healing control method for coordinated shore power and new energy power supply provided in this embodiment of the invention can be included in the application program 6022.

[0087] The methods disclosed in the above embodiments of the present invention can be applied to processor 601, or implemented by processor 601. Processor 601 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 601 or by instructions in the form of software. The processor 601 may be a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Processor 601 can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. General-purpose processor 601 may be a microprocessor or any conventional processor, etc. The steps of the accessory optimization method provided in the embodiments of the present invention can be directly reflected as being executed by a hardware decoding processor, or being executed by a combination of hardware and software modules in the decoding processor. The software module may be located in a storage medium, which is located in a memory. The processor reads the information in the memory and combines it with its hardware to complete the steps of the aforementioned method.

[0088] In an exemplary embodiment, the electronic terminal 600 may be used to execute the aforementioned method by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), or complex programmable logic devices (CPLDs).

[0089] According to the method provided in the embodiments of this application, this application also provides a computer program product, which includes: computer program code, which, when run on a computer, causes the computer to perform the method of any of the embodiments described above.

[0090] According to the method provided in the embodiments of this application, this application also provides a computer-readable storage medium storing program code, which, when run on a computer, causes the computer to perform the method of any of the embodiments described above.

[0091] As used in this specification, the terms "component," "module," "system," etc., are used to refer to computer-related entities, hardware, firmware, combinations of hardware and software, software, or software in execution. For example, a component can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or a computer. As illustrated, applications running on computing devices and computing devices can both be components. One or more components may reside in a process and / or an execution thread, and components may be located on a single computer and / or distributed among two or more computers. Furthermore, these components can be executed from various computer-readable media on which various data structures are stored. Components can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from two components interacting with another component between a local system, a distributed system, and / or a network, such as the Internet interacting with other systems via signals).

[0092] Those skilled in the art will recognize that the various illustrative logical blocks and steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0093] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0094] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0095] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0096] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0097] In the above embodiments, the functions of each functional unit can be implemented entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially in the form of a computer program product. A computer program product includes one or more computer instructions (programs). When the computer program instructions (programs) are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. Computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that integrates one or more available media. Available media can be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state disks (SSDs)).

[0098] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0099] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0100] In summary, the ship-to-shore power and renewable energy power supply coordination ship-to-grid self-healing control system, method, medium, program product, and terminal provided in this application include: a shore power access coordination module, used to access the ship-to-shore power system and perform synchronous adjustment and switching operations based on the differences between the ship-to-shore power system and the ship-to-grid; a shipborne renewable energy power generation module, used to provide power to the ship-to-grid and collect the operating status parameters of the renewable energy power generation equipment in real time; a multi-element energy storage module, used to store energy and provide power to the ship-to-grid; a grid status perception module, used to acquire the operating status parameters of the ship-to-grid in real time and perform fusion analysis on the operating status parameters of the ship-to-grid to obtain the status perception data of the ship-to-grid; and a grid self-healing control module, used to perform fault diagnosis based on the operating status parameters of the renewable energy power generation equipment and the status perception data of the ship-to-grid, acquire the corresponding self-healing strategy from the preset self-healing strategy library according to the fault diagnosis results, generate corresponding control commands according to the self-healing strategy, and perform fault repair based on the control commands.

[0101] In this application, the coordinated switching process between the ship's shore power system and renewable energy supply reduces inrush current and extends equipment lifespan through a synchronous adjustment unit. Furthermore, the voltage fluctuations during switching are minimal, preventing damage to sensitive equipment due to voltage surges. This application effectively enhances the ship's grid self-healing capability through a grid status sensing module and a grid self-healing control module. It optimizes the traditional manual troubleshooting method for ship grid faults to automatic fault identification and isolation, shortening fault handling time and reducing fault propagation rate. It also enables rapid power restoration response and ensures continuous and stable power supply to the ship's loads after renewable energy supply interruptions. When the ship is docked, the coordinated operation of the ship's shore power system and renewable energy supply reduces energy consumption. When the ship is sailing, the coordinated operation of renewable energy and multi-energy storage modules enhances the local absorption capacity of renewable energy and reduces ineffective charging and discharging behavior of multi-energy storage modules, thereby improving overall energy utilization efficiency and system operational economic benefits. Through load priority management and coordinated operation of multi-energy storage, this application enables the multi-energy storage modules to provide stable power support for high-priority primary and secondary loads under extreme conditions. This not only meets the continuous power supply needs for emergency return to port but also effectively extends the ship's operational endurance. Therefore, this application effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0102] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A ship shore power and new energy power supply collaborative ship power grid self-healing control system, characterized in that, The shipboard electrical grid self-healing control system is communicatively connected to both the ship's shore power system and the ship's electrical grid; the shipboard electrical grid self-healing control system includes: A shore power access coordination module is used to access the ship's shore power system and to perform synchronous adjustment and switching operations based on the differences between the ship's shore power system and the ship's electrical grid. The shipborne new energy power generation module is used to provide power to the ship's power grid and to collect the operating status parameters of the new energy power generation equipment in real time. A multi-energy storage module is used to store electrical energy and provide power to the ship's electrical grid; The power grid status sensing module is used to acquire the operating status parameters of the ship's power grid in real time, and to perform fusion analysis on the operating status parameters of the ship's power grid to obtain the status sensing data of the ship's power grid. The power grid self-healing control module is used to perform fault diagnosis based on the operating status parameters of new energy power generation equipment and the status perception data of the ship's power grid. Based on the fault diagnosis results, it obtains the corresponding self-healing strategy from the preset self-healing strategy library, generates the corresponding control command based on the self-healing strategy, and performs fault repair based on the control command.

2. The ship shore power and new energy power supply collaborative ship power grid self-healing control system according to claim 1, characterized in that, The shore power access coordination module includes: A shore power interface unit is used to connect to the ship's shore power system and monitor the shore power supply parameters of the ship's shore power system in real time. The synchronization adjustment unit is used to dynamically adjust the shore power supply parameters of the ship's shore power system to be synchronized with the voltage phase and frequency of the ship's power grid through digital phase-locked loop technology. The switching execution unit is used to perform the switching operation after the ship's shore power system has been synchronized.

3. The shore power and new energy power supply collaborative ship power grid self-healing control system according to claim 1, characterized in that, The shipborne new energy power generation module includes: A new energy power generation unit is used to provide electrical energy to the ship's power grid; The new energy monitoring unit is used to collect real-time operating status parameters of new energy power generation equipment.

4. The shipboard power grid self-healing control system for coordinated shore power and new energy power supply according to claim 1, characterized in that, The system also includes a load management module; the load management module is used to receive control commands and dynamically schedule the ship's load according to the control commands.

5. A ship shore power and new energy power supply collaborative ship power grid self-healing control method, characterized in that, The method is applied to a shipboard power grid self-healing control system for coordinating shore power and renewable energy power supply as described in any one of claims 1 to 4; the method includes: During the shore power and renewable energy collaborative operation phase, the system is connected to the ship's shore power system, and synchronous adjustment and switching operations are performed based on the differences between the ship's shore power system and the ship's power grid. During the grid fault self-healing phase, fault diagnosis is performed based on the operating status parameters of new energy power generation equipment and the status perception data of the ship's power grid. According to the fault diagnosis results, the corresponding self-healing strategy is obtained from the preset self-healing strategy library, and the corresponding control command is generated according to the self-healing strategy. Fault repair is performed based on the control command.

6. The method according to claim 5, characterized in that, The coordinated operation phase of shore power and new energy sources includes: During the port call phase, the shore power interface unit connects to the ship's shore power system and monitors the shore power supply parameters of the ship's shore power system in real time; the synchronization adjustment unit dynamically adjusts the shore power supply parameters of the ship's shore power system to synchronize with the voltage phase and frequency of the ship's power grid; the switching execution unit performs the switching operation after the ship's shore power system is synchronized. During the departure voyage, the shore power interface unit is disconnected from the ship's shore power system. The grid self-healing control module sends control commands to the ship's new energy power generation module and / or multi-energy storage module to control the ship's new energy power generation module and / or multi-energy storage module to provide power to the ship's grid.

7. The method according to claim 5, characterized in that, The power grid fault self-healing phase includes: During the partial short-circuit fault stage, the power grid status perception module acquires the operating status parameters of the ship's power grid in real time, and performs fusion analysis on the operating status parameters of the ship's power grid to obtain the status perception data of the ship's power grid. The power grid self-healing control module performs fault diagnosis based on the status perception data of the ship's power grid. The fault diagnosis results include the fault type as short-circuit fault and the location of the fault branch. Based on the fault diagnosis results, the corresponding control commands are sent to the ship's power grid. During a sudden interruption of renewable energy supply, the shipborne renewable energy power generation module collects the operating status parameters of the renewable energy power generation equipment in real time. The grid self-healing control module performs fault diagnosis based on the operating status parameters of the renewable energy power generation equipment. The fault diagnosis results include renewable energy supply interruption. Based on the fault diagnosis results, the module sends corresponding control commands to the shore power access coordination module or the multi-energy storage module.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, When the computer program is executed by the processor, it implements the ship power grid self-healing control method for coordinating shore power and new energy power supply as described in any one of claims 5 to 7.

9. A computer program product, characterised in that, The computer program product includes computer program code, which, when run on a computer, enables the computer to implement the ship power grid self-healing control method for coordinating shore power and new energy power supply as described in any one of claims 5 to 7.

10. An electronic terminal comprising a memory, a processor and a computer program stored on the memory, characterized in that, The processor executes the computer program to implement the ship power grid self-healing control method for coordinating shore power and new energy power supply as described in any one of claims 5 to 7.

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