Ship electrical system design system and installation method

Abstract

The present invention relates to a ship electrical system design system and an installation method thereof, comprising a generator set, an external power supply and a load module. The generator set is electrically connected to the load module via an electrical control cabinet and a connection circuit. The electrical control cabinet is provided with an external power supply interface. The electrical control cabinet is used to regulate the generator set and the external power supply according to the requirements of the load module. The electrical control cabinet also comprises: a design module, which is used to design a connection circuit according to load information of the load module; a verification module, which is used to verify the adjustment time and safety index of the generator set and the external power supply when responding to the load demand; and a strategy adjustment module, which is used to adjust the power supply of the generator set and the external power supply according to the load demand. The strategy adjustment module is used to adjust the voltage reduction starting parameters of the requesting device that issues the load demand. The various usage scenarios designed by the design module can be fully designed according to practical needs before starting to arrange the ship's electrical system.

Description

Technical Field

[0001] The present invention relates to the field of electrical safety technology, and in particular to a ship electrical system design system and an installation method thereof. Background Art

[0002] Electrical systems are diverse and widely used. When high-power loads on ships suddenly start up, they can quickly reduce the output voltage of shore-based power supplies. Current converters are often replaced with frequency converters (VFDs), often based on motor-driven control strategies. These strategies have a long response time to voltage drops and cannot truly meet the power needs of ships while docked. Converter control strategies are typically based on motor-driven VVVF or vector control. These strategies tolerate voltage drops of up to 65% (with a 35% voltage dip amplitude) and a long duration (up to tens of seconds). Furthermore, motors have a single load characteristic and can operate for extended periods even in undervoltage conditions. However, shipboard loads vary widely, including linear, inductive, nonlinear, and capacitive loads. Furthermore, voltage stability requirements for radar, instrumentation, sensors, and refrigeration compressors are extremely high. Typically, voltage dips must not exceed 1.5 seconds, and the amplitude must not exceed 20%. Otherwise, these devices will shut down, causing economic losses and compromising ship safety. The increase in voltage drop time will have an impact on the load. If it is a single load, the allowable drop time is longer. However, if it is multiple loads, once the voltage drop time increases, it will cause equipment with higher voltage stability to shut down, causing safety problems.

[0003] Therefore, a method is needed to verify and optimize the electrical system of the ship according to the usage requirements before the electrical system of the ship is arranged, so as to reduce the probability of failure of the electrical system of the ship when it is in use. Summary of the Invention

[0004] The purpose of the present invention is to provide a ship electrical system design system and an installation method thereof to solve the problems existing in the above-mentioned prior art.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A ship electrical system design system includes a generator set, an external power supply, and a load module. The generator set is electrically connected to the load module via an electrical control cabinet. The electrical control cabinet is provided with an external power supply interface. The electrical control cabinet is used to control the generator set and the external power supply according to the requirements of the load module. The system also includes a design module for designing a connection circuit based on load information of the load module.

[0007] A verification module, the verification module is used to verify the adjustment time and safety indicators of the generator set and the external power supply when responding to load demand;

[0008] and a strategy adjustment module, the strategy adjustment module is used to adjust the power supply of the generator set and the external power supply according to the load demand, and the strategy adjustment module is used to adjust the voltage reduction starting parameters of the requesting device that issues the load demand.

[0009] By adopting the above technical solution, the various usage scenarios designed by the design module can be fully designed according to practical needs before the ship's electrical system is arranged, avoiding the problem of being unable to safely start high-load equipment when the ship is docked at the dock and connected to an external power supply due to the imbalance of usage scenarios after the ship's electrical system is arranged.

[0010] In a further embodiment, the design module is composed of a priority evaluation unit, an instantaneous power acquisition unit, a working power acquisition unit and an analysis unit. The priority evaluation unit is used to determine the priority weight according to the usage nature of the load device. The instantaneous power acquisition unit is used to collect the instantaneous current and voltage when the load device is started. The working power acquisition unit is used to collect the maximum working power of the load device, the long-term working power of the load device and the working power amplitude of the load device. The analysis unit is used to analyze whether the load device is a basic device or a functional device. The functional device is a device used to monitor the operating status of the ship and to observe the environment around the ship. The basic equipment is the ship's own attitude adjustment equipment and the ship's power equipment.

[0011] By adopting the above technical solution, the basic equipment includes the ship's engine, propeller and other devices for directly driving the ship's movement, as well as devices for changing the ship's movement state and changing the ship's movement direction. A common point of these devices is that they need to be kept in a started state during the operation of the ship, including radar, sonar, air conditioning and other equipment; functional equipment mainly includes hatch opening and closing devices, cargo hold bottom transport devices and other equipment that do not need to be started for a long time during the ship's movement. These equipment often need to be started after the ship stops. At this time, the ship's generator set is in a low-power operation state or even a shutdown state, and is mainly powered by an external power supply. Therefore, in order to avoid affecting the ship's basic equipment when these devices are started, such as the air-conditioning system, because loading and unloading takes a long time, the air-conditioning system on the ship needs to operate stably to maintain the operating environment of various equipment inside the ship that requires a stable temperature.

[0012] In a further embodiment, the verification module includes a full-power verification unit, an instantaneous power verification unit and a switching verification unit. The full-power verification unit is used to check whether the external power supply and the generator set meet the operating conditions when the load module is started at full power. If so, no alarm is issued; if not, an alarm is issued; the instantaneous power verification unit is used to verify whether the circuit of the load equipment in each line is overloaded at instantaneous startup. If overloaded, an alarm is issued; if not, no alarm is issued; the switching verification unit is used to verify whether the abnormal fluctuation of the load module exceeds the design standard when the external power supply and the generator set switch power through the electrical control cabinet. If exceeded, an alarm is issued; if not exceeded, no alarm is issued.

[0013] By adopting the above technical solution and performing a redundant design, it is ensured that each load branch in the connection circuit will not fail due to the instantaneous start-up of the load device connected thereto.

[0014] In a further embodiment, the strategy adjustment module includes a load device startup strategy formulation unit, a generator set power generation strategy formulation unit and an external power supply strategy formulation unit. The load device startup strategy formulation unit is used to adjust the load device's voltage reduction startup strategy and feed it back to the generator set. The power generation strategy formulation unit is used to adjust the power generation according to the voltage reduction startup strategy. The external power supply strategy formulation unit is used to adjust the external power supply power according to the voltage reduction startup strategy.

[0015] By adopting the above technical solution, the reduced voltage starting strategy is fed back to the generator set and the external power supply, so that it can be judged whether the current reduced voltage starting strategy can be operated, and whether the generator set and the external power supply can be adjusted accordingly under the current reduced voltage starting strategy. If so, it will be operated; if not, the reduced voltage starting strategy will continue to be adjusted.

[0016] In a further embodiment, the electrical control cabinet is used to achieve coupling of the generator set / external power supply with the load module via a plurality of busbars.

[0017] By adopting the above technical solution, it is possible to avoid the situation where a single busbar energy supply causes all devices to be affected by unexpected failures when the load equipment is started. This setting allows load equipment of different importance levels to be placed on different busbar lines.

[0018] In a further embodiment, the connection circuit includes at least two paths electrically connected to the load devices on the load modules.

[0019] The present invention also discloses a method for installing a ship electrical system design system, comprising the following steps:

[0020] Step 1: Install the equipment of the load module in the corresponding areas of the ship;

[0021] Step 2: Connect each load device to at least two power supply circuits, and establish an electromagnetic isolation structure between the two power supply circuits;

[0022] Step 3: Turn on one functional circuit and disconnect the remaining power supply circuits through the electrical control cabinet.

[0023] In a further embodiment, step three requires further verification, by detecting whether there is current in the remaining energy supply circuits through low-voltage conduction. If there is current, it is disconnected again; if not, it is judged to be safe.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. Through the design of multiple usage scenarios of the design module, a complete design can be made according to practical needs before the ship's electrical system is laid out, avoiding the problem that after the ship's electrical system is laid out, the ship cannot safely start high-load equipment when docked at the dock and connected to the external power supply due to the unequal usage scenarios; when adjusting the strategy, it is necessary to identify the control signals on the same line and classify them to determine the equipment that starts first or the equipment that needs to be started in coordination, and then adjust the generator set according to the speed reference value to ensure the normal operation of the generator set. For example, in the design software or design manuscript, the equipment on a certain line is set to control the propeller motor, the cab The lights, the water temperature sensor in the cab and the sonar, the sonar and the propeller motors are all high-energy-consuming devices, and the propeller motor has a higher priority than the sonar, the sonar has a higher priority than the water temperature sensor, and the water temperature sensor has a higher priority than the lights. When they need to be started at the same time, at this time, the generator is set to supply 1000 kWh to the line. The propeller motor, the lights in the cab, the water temperature sensor in the cab and the sonar are switched from a stationary state to a working state at the same time. When they start, they require a total of 1200 kWh of power, which exceeds the power limit of the line. But at the same time, their working power may be only 800-850 kWh, so they need to be started in order of priority. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the overall flow chart of the ship electrical system design system of the present invention;

[0027] Figure 2 This is a feedback control flow chart of a strategy adjustment module of a ship electrical system design system of the present invention;

[0028] Figure 3 It is a circuit layout diagram of the installation method of the ship electrical system design system of the present invention. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the attached Figure 1 In the description, the terms "bottom" and "top," "inner" and "outer" refer to directions toward or away from a particular component geometry, respectively. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this specification, "plurality" means two or more, unless otherwise specifically defined in terms of the center's direction.

[0031] Example 1: Figure 1-Figure 2As shown, a ship electrical system design system includes a generator set, an external power supply and a load module. The generator set is electrically connected to the load module through an electrical control cabinet and a connecting circuit. The electrical control cabinet is provided with an external power supply interface. The electrical control cabinet is used to regulate the generator set and the external power supply according to the needs of the load module. It also includes: a design module, the design module is used to design a connecting circuit according to the load information of the load module, the design module is composed of a priority evaluation unit, an instantaneous power acquisition unit, a working power acquisition unit and an analysis unit. The priority evaluation unit is used to determine the priority weight according to the usage nature of the load device. The instantaneous power acquisition unit is used to collect the instantaneous current and voltage when the load device is started. The working power acquisition unit is used to collect the maximum working power of the load device, the long-term working power of the load device and the working power amplitude of the load device. The analysis unit is used to analyze whether the load device is a basic device or a functional device. The functional device is used to monitor the operating status of the ship and for observing Equipment for measuring the environment around the ship, the basic equipment is the ship's own attitude adjustment equipment and ship power equipment. The basic equipment includes the ship's engine, propeller and other devices for directly driving the ship to move forward, and also includes devices for changing the ship's travel state and changing the ship's travel direction. A common point of these devices is that they need to be kept in a started state during the operation of the ship, including radar, sonar, air conditioning and other equipment; functional equipment mainly includes hatch opening and closing devices, cargo hold bottom transport devices and other equipment that do not need to be started for a long time during the ship's movement. These equipment often need to be started after the ship stops steadily. At this time, the ship's generator set is in a low-power operating state or even a shutdown state, and is mainly powered by an external power supply. Therefore, in order to avoid affecting the ship's basic equipment when these devices are started, such as the air-conditioning system, because loading and unloading takes a long time, the air-conditioning system on the ship needs to operate stably to maintain the operating environment of various equipment inside the ship that requires a stable temperature.

[0032] Therefore, at the initial design stage, all ship load equipment must be carefully categorized and prioritized. Using the priority assessment unit within the design module, weights are determined based on the equipment's function and usage. For example, basic equipment (priority level 1) includes the ship's engine, propeller, attitude adjustment system, radar, and air conditioning system; functional equipment (priority level 2) includes the cargo hold transport system, hatch cover opening and closing equipment, and deck lighting systems. The instantaneous power acquisition unit collects current and voltage data during equipment startup, e.g., radar startup instantaneous power of 300kW and air conditioning 200kW. The operating power acquisition unit records the long-term power range (e.g., radar long-term power of 150kW and air conditioning 120kW). Based on the actual operational scenarios of these devices, their outputs are calculated to generate a power demand table for the load equipment, which is then allocated to different busbars based on their priority weights. For example, basic equipment is connected to the main busbar (priority line), while functional equipment is connected to the backup busbar. Each load equipment must be connected to at least two independent power supply circuits with electromagnetic isolation. For example, a ship's engine is connected to the generator set and external power interface via two independent lines, with magnetic isolators installed between the lines to prevent electromagnetic interference. Busbar hierarchical design: The main busbar (Line A) carries priority 1 equipment, and the backup busbar (Line B) carries priority 2 equipment. The electrical control cabinet uses a multi-way switch to implement line switching.

[0033] like Figure 1-Figure 2As shown, a verification module is used to verify the adjustment time and safety index of the generator set and the external power supply when responding to the load demand. The verification module includes a full-power verification unit, an instantaneous power verification unit and a switching verification unit. The full-power verification unit is used to check whether the external power supply and the generator set meet the operating conditions when the load module is started at full power. If so, no alarm is issued, and if not, an alarm is issued; the instantaneous power verification unit is used to verify whether the circuit of the load equipment in each line is overloaded at the instant of startup. If overloaded, an alarm is issued, and if not, no alarm is issued; the switching verification unit is used to verify whether the abnormal fluctuation of the load module exceeds the design standard when the external power supply and the generator set switch the power supply through the electrical control cabinet. If exceeded, an alarm is issued. If it exceeds the limit, an alarm will be issued; if it does not exceed the limit, no alarm will be issued. Redundancy design is carried out to ensure that each load branch in the connected circuit will not fail due to the instantaneous start-up of the load equipment connected to it; specifically, the verification module mainly includes: full-power verification. Full-power verification requires starting all load equipment to full-power operation state, and monitoring the output stability of the generator set and external power supply through the full-power verification unit. For example, if the total demand exceeds the power supply capacity, the system triggers an alarm and automatically cuts off non-critical equipment (such as deck lighting), and evaluates the test results. If the output fluctuation of the generator set is less than ±5% and the external power supply switching response time is less than 0.5 seconds, it is judged to be qualified, and the formulation of safety indicators (such as voltage fluctuation threshold) is based on reference to the international standard IEC60092.

[0034] In addition, the verification module also includes instantaneous power verification. For example, when simulating the simultaneous startup of the radar and air conditioning, the instantaneous power demand is 500kW. The instantaneous power verification unit detects whether the line is overloaded. If the line is rated at 400kW, the system triggers an alarm and initiates a voltage reduction strategy (such as starting the radar and air conditioning in a time-sharing manner). At this time, it is necessary to adjust the radar startup timing and start the air conditioning after a delay of 0.2 seconds to ensure that the instantaneous power peak drops to less than 400kW, so that the radar system and air conditioning can be started separately.

[0035] Because the system needs to be practical in various scenarios, power switching verification is also required. This includes abnormal fluctuation testing: During the switching process between the generator set and the external power source, the load module voltage fluctuation is monitored. If the fluctuation exceeds the design standard (±10%), the switching verification unit triggers the protection mechanism, prioritizing the maintenance of power to the basic equipment. This also includes electromagnetic isolation verification: Using an oscilloscope to measure the electromagnetic interference strength of the backup line to ensure that the isolation structure effectively suppresses high-frequency noise.

[0036] like Figure 1-Figure 2As shown, and a strategy adjustment module, the strategy adjustment module is used to adjust the power supply of the generator set and the external power supply according to the load demand, the strategy adjustment module is used to adjust the voltage reduction starting parameters of the request device that issues the load demand, the strategy adjustment module includes a load device startup strategy formulation unit, a generator set power generation strategy formulation unit and an external power supply strategy formulation unit, the load device startup strategy formulation unit is used to adjust the voltage reduction starting strategy of the load device and feed it back to the generator set, the power generation strategy formulation unit is used to adjust the power generation according to the voltage reduction starting strategy, the external power supply strategy formulation unit is used to adjust the external power supply power according to the voltage reduction starting strategy, the voltage reduction starting strategy is fed back to the generator set and the external power supply, and it can be judged whether the current voltage reduction starting strategy can be operated. Under the current voltage reduction starting strategy, the generator set And whether the external power supply can be regulated accordingly, if yes, then it will be run, if not, then continue to adjust the step-down starting strategy, the various usage scenarios designed by the design module can be fully designed according to practical needs before starting to arrange the ship's electrical system, to avoid the problem that after the ship's electrical system is arranged, the ship cannot safely start high-load equipment when docked at the dock and connected to the external power supply due to the inequality of usage scenarios. The electrical control cabinet is used to realize the coupling of the generator set / external power supply with the load module through multiple busbars, which can avoid the single busbar power supply causing the load equipment to affect all equipment due to unexpected failure when starting. This setting allows load equipment of different importance levels to be placed on different busbar lines respectively, and the connection circuit includes at least two paths that are electrically connected to the load equipment on the load module;

[0037] When necessary, the reduced-voltage startup strategy is implemented. For example, when the propeller motor and sonar are started in coordination, when both are started at the same time, the instantaneous power demand is 1200kW (the line upper limit is 1000kW). The load equipment startup strategy formulation unit adjusts the startup parameters: the propeller motor adopts soft start (50% voltage reduction), and it takes 2 seconds to restore full voltage; the sonar starts with a 1-second delay to avoid superimposed peaks. The power generation strategy formulation unit simultaneously increases the output to 1100kW, and the external power supply supplements 100kW; dynamic power allocation, real-time monitoring and feedback are carried out at the same time: the strategy adjustment module collects load power data in real time through sensors. For example, when the cargo warehouse transport device is started, the instantaneous power demand increases sharply, and the system automatically limits the air conditioning power to 80%, releasing 200kW of capacity for use by the transport device.

[0038] In summary, according to the above technical solution, the present invention is divided into two application scenarios:

[0039] Scenario 1: External power supply connection when the ship is docked:

[0040] When simulating the startup of a warehouse transport device, the external power supply needs to provide 500kW of power instantaneously. The design module verifies whether the external power interface capacity meets this requirement and configures a reduced-voltage startup strategy to minimize the impact.

[0041] Scenario 2, full power navigation mode:

[0042] When all devices are started simultaneously, the total instantaneous power demand is 2500kW (generator sets rated at 2000kW). The strategy adjustment module automatically connects to an external power source to supplement 500kW and delays the start of functional devices according to priority.

[0043] Specific implementation process: Set the ship's generator power generation at X megawatts, there are a total of N energy consumption modules, and the total energy consumption of each energy consumption module is marked as WN. The startup instantaneous power consumption of the WN module is PN, the operating power consumption is P1N, and the maximum power consumption is P2N. Use the summation formula to calculate the startup instantaneous power consumption of all energy consumption modules that need to be started at the same time and determine whether the sum is greater than X. If it is greater, it is necessary to connect to an external power supply. If it is less, check each route one by one. When adjusting the strategy, it is necessary to identify the control signals on the same line and classify them to determine the equipment that starts first or the equipment that needs to be started in coordination. Then adjust the generator set according to the speed reference value to ensure the normal operation of the generator set, such as in the design software or in the design manuscript. , set the equipment on a certain line to control the propeller motor, cab lights, cab water temperature sensor and sonar. The sonar and propeller motors are both high-energy-consuming devices, and the propeller motor has a higher priority than the sonar, the sonar is higher than the water temperature sensor, and the water temperature sensor is higher than the light. When they need to be started at the same time, at this time, set the generator to supply 1000 kWh to the line. The propeller motor, cab lights, cab water temperature sensor and sonar are switched from static to working state at the same time. When they start, they require a total of 1200 kWh of power, which exceeds the power limit of the line. But at the same time, their working power may be only 800-850 kWh, so they need to be started in order of priority.

[0044] When a ship docks to load or unload cargo, the cargo hold transport unit (200kW) and the refrigeration compressor (150kW) must be started simultaneously. The external power interface is rated at 300kW. The system begins to respond: the verification module detects insufficient external power capacity and triggers an alarm.

[0045] The strategy adjustment module activates the voltage reduction strategy, limiting the starting current of the transport device to 150kW and delaying the start of the refrigeration compressor by 5 seconds; at the same time, the generator set supplements 100kW and the external power supply provides 200kW.

[0046] In this case, the equipment started successfully after the adjustment was completed, and the voltage fluctuation was controlled within ±8%, without affecting the operation of basic equipment (such as the air-conditioning system).

[0047] Example 2: Figure 3 As shown, the installation method of the ship electrical system design system is to install the equipment of the load module in the corresponding areas of the ship respectively;

[0048] Step 2: Connect each load device to at least two power supply circuits, and establish an electromagnetic isolation structure between the two power supply circuits;

[0049] Step 3: Turn on one functional circuit and disconnect the remaining energy supply circuits through the electrical control cabinet. Use low-voltage conduction to detect whether there is current in the remaining energy supply circuits. If there is current, disconnect it again. If not, it is judged to be safe.

[0050] In the embodiments disclosed herein, terms such as "installed," "connected," "connected," and "fixed" should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; and "connected" may refer to a direct connection or an indirect connection via an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments disclosed herein based on specific circumstances.

[0051] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A ship electrical system design system, comprising a generator set, an external power supply, and a load module. The generator set is electrically connected to the load module via an electrical control cabinet, which is provided with an external power supply interface. The electrical control cabinet is used to regulate the generator set and the external power supply according to the requirements of the load module. The system is characterized in that: The system further includes: a design module, the design module is used to design a connection circuit according to the load information of the load module, the design module is composed of a priority evaluation unit, an instantaneous power acquisition unit, an operating power acquisition unit and an analysis unit, the priority evaluation unit is used to determine the priority weight according to the usage nature of the load device, the instantaneous power acquisition unit is used to acquire the instantaneous current and voltage of the load device when it is started, the operating power acquisition unit is used to acquire the maximum operating power of the load device, the long-term operating power of the load device and the operating power amplitude of the load device, and the analysis unit is used to analyze whether the load device is a basic device or a functional device, the functional device is a device used to monitor the operating status of the ship and to observe the environment around the ship, and the basic device is the ship's own attitude adjustment device and the ship's power equipment; A verification module, the verification module is used to verify the adjustment time and safety indicators of the generator set and the external power supply when responding to load demand; and a strategy adjustment module, the strategy adjustment module is used to adjust the power supply of the generator set and the external power supply according to the load demand, and the strategy adjustment module is used to adjust the voltage reduction starting parameters of the requesting device that issues the load demand.

2. The ship electrical system design system according to claim 1, characterized in that: The verification module includes a full-power verification unit, an instantaneous power verification unit and a switching verification unit. The full-power verification unit is used to check whether the external power supply and the generator set meet the operating conditions when the load module is started at full power. If so, no alarm is issued; if not, an alarm is issued; the instantaneous power verification unit is used to verify whether the circuit of the load equipment in each line is overloaded at instantaneous startup. If overloaded, an alarm is issued; if it does not exceed the load, no alarm is issued; the switching verification unit is used to verify whether the abnormal fluctuation of the load module exceeds the design standard when the external power supply and the generator set switch power through the electrical control cabinet. If so, an alarm is issued; if not, no alarm is issued.

3. The ship electrical system design system according to claim 1, characterized in that: The strategy adjustment module includes a load device startup strategy formulation unit, a generator set power generation strategy formulation unit and an external power supply strategy formulation unit. The load device startup strategy formulation unit is used to adjust the load device's voltage reduction startup strategy and feed it back to the generator set. The power generation strategy formulation unit is used to adjust the power generation according to the voltage reduction startup strategy. The external power supply strategy formulation unit is used to adjust the external power supply power according to the voltage reduction startup strategy.

4. The ship electrical system design system according to claim 1, characterized in that: The electrical control cabinet is used to achieve coupling between the generator set / external power supply and the load module via multiple busbars.

5. The ship electrical system design system according to claim 1, characterized in that: The connection circuit includes at least two paths electrically connected to the load devices on the load modules.

6. A method for installing a ship electrical system design system according to any one of claims 1 to 5, characterized in that: The following steps are involved: Step 1: Install the equipment of the load module in the corresponding areas of the ship; Step 2: Connect each load device to at least two power supply circuits, and establish an electromagnetic isolation structure between the two power supply circuits; Step 3: Turn on one functional circuit and disconnect the remaining power supply circuits through the electrical control cabinet.

7. The installation method of the ship electrical system design system according to claim 6, characterized in that: The step three requires further verification, and whether there is current in the remaining energy supply circuits is detected by low-voltage conduction. If there is current, it is disconnected again. If not, it is judged to be safe.

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