Ship electrical system design system and installation method thereof

Abstract

The invention relates to a ship electrical system design system and an installation method thereof, the ship electrical system design system comprises a generator set, an external power supply and a load module, the generator set is electrically connected with the load module through an electrical control cabinet and a connection circuit, and the electrical control cabinet is provided with an external power supply interface; the electrical control cabinet is used for regulating and controlling the generator set and the external power supply according to the requirements of the load module, and the design module is used for designing a connection circuit according to the load information of the load module; the verification module is used for verifying the adjustment time and the safety index when the generator set and the external power supply respond to the load demand; the strategy adjusting module is used for adjusting the power supply power of the generator set and the external power supply according to the load demand, and the strategy adjusting module is used for adjusting the step-down starting parameter of the request equipment sending the load demand; and a plurality of use scenes designed by the design module can be perfectly designed according to practical requirements before starting to arrange an electrical system of the ship.

Description

Technical Field

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

[0002] There are many types of electrical systems with wide applications. When a high-power load on a ship suddenly starts, it will extremely quickly pull down the output voltage of the onshore ship power supply. Currently, inverters usually use frequency converters as a substitute. The strategies are mostly control strategies based on motor drive, and the response time to voltage dips is relatively long, unable to truly meet the electricity consumption needs during ship docking. The control strategies of the inverter part are usually based on the VVVF or vector control strategies of motor drive. Such strategies allow the voltage to drop to 65% (the voltage drop amplitude is 35%), and at the same time, the allowable drop time is relatively long (up to dozens of seconds). At the same time, the load characteristics of the motor are single and it can work for a long time under undervoltage conditions. However, the loads on a ship include loads with various characteristics such as linear loads, inductive loads, non-linear loads, and capacitive loads. And for devices such as radar, instruments, sensors, or refrigeration compressors on a ship, the voltage stability requirements are extremely high. Usually, the voltage drop time cannot exceed 1.5 seconds, and the drop amplitude cannot exceed 20%. Otherwise, these devices will all stop operating, causing economic losses and driving safety problems to the ship. Moreover, the increase in the voltage drop time will have an impact on the load. If it is a single load, the allowable drop time is relatively long. However, if there are multiple loads, once the voltage drop time increases, it will cause devices with high voltage stability requirements to stop operating, resulting in safety problems.

[0003] Therefore, a method is needed to verify and optimize the electrical system according to the usage requirements before arranging the ship's electrical system, so as to reduce the probability of faults when the ship's electrical system 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 purpose of the present invention is achieved through the following technical solutions: 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. 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. It further includes: a design module, which is used to design a connection circuit according to the load information of the load module; A verification module, which is used to verify the adjustment time and safety indicators when the generator set and the external power supply respond to the load requirements; And a policy adjustment module, which is used to adjust the power supply of the generator set and the external power supply according to the load demand, and is also used to adjust the step-down starting parameters of the requesting device that issues the load demand.

[0006] By adopting the above technical solution, various usage scenarios designed by the design module can be perfectly designed according to practical requirements before starting to arrange the ship's electrical system, avoiding the problem that after the ship's electrical system is arranged, due to the inequality of usage scenarios, the ship cannot safely start high-load equipment when docking at the wharf and connecting to the external power supply.

[0007] 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 value according to the usage nature of the load equipment. The instantaneous power acquisition unit is used to collect the instantaneous current and voltage when the load equipment starts. The working power acquisition unit is used to collect the maximum working power, the long-term working power and the working power amplitude of the load equipment. The analysis unit is used to analyze whether the load equipment is a basic equipment or a functional equipment. The functional equipment is the equipment used to monitor the running state of the ship and to observe the environment around the ship. The basic equipment is the ship's own attitude adjustment equipment and ship power equipment.

[0008] By adopting the above technical solution, the basic equipment includes devices such as the ship's engine and propeller for directly driving the ship forward, and also includes devices for changing the running state and direction of the ship. A common feature of these devices is that they need to remain in the starting state during the operation of the ship, and among them are devices such as radar, sonar, and air conditioners; the functional equipment mainly includes devices such as the hatch opening and closing device and the bottom transportation device of the cargo hold, which do not need to be started for a long time during the ship's voyage. These devices often need to be started after the ship stops stably. At this time, the ship's generator set is running at a low power or even in a shutdown state, and the power supply is mainly realized through the external power supply. Therefore, in order to avoid the impact on the ship's basic equipment when these devices start, such as the air conditioning system, because the loading and unloading of goods takes a long time, the air conditioning system on the ship needs to run stably to maintain the operating environment of various equipment that require a stable temperature inside the ship.

[0009] 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 starts at full power. If they meet the conditions, no alarm is issued; if not, an alarm is issued. The instantaneous power verification unit is used to verify whether the circuit is overloaded when the load devices in each line start instantaneously. If it is overloaded, an alarm is issued; if it does not exceed the standard, 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 it exceeds, an alarm is issued; if it does not exceed, no alarm is issued.

[0010] By adopting the above technical solution, redundant design is carried out to ensure that each load branch in the connection circuit will not fail due to the instantaneous start of the load devices connected thereto.

[0011] In a further embodiment, the strategy adjustment module includes a load device start strategy formulation unit, a power generation power strategy formulation unit for the generator set, and an external power supply strategy formulation unit. The load device start strategy formulation unit is used to adjust the step-down start strategy of the load device and feedback it to the generator set. The power generation power strategy formulation unit is used to adjust the power generation power according to the step-down start strategy. The external power supply strategy formulation unit is used to adjust the power supply power of the external power supply according to the step-down start strategy.

[0012] By adopting the above technical solution, the step-down start strategy is fed back to the generator set and the external power supply, so as to judge whether the current step-down start strategy can operate and whether the generator set and the external power supply can perform corresponding regulation under the current step-down start strategy. If it can, it operates; if not, the step-down start strategy is continuously adjusted.

[0013] In a further embodiment, the electrical control cabinet is used to realize the coupling of the generator set / external power supply with the load module through multiple busbars.

[0014] By adopting the above technical solution, it is possible to avoid the situation that the start of the load devices is affected by accidental failures of all devices due to single busbar power supply. This setting enables load devices with different importance levels to be placed on different busbar lines respectively.

[0015] In a further embodiment, the connection circuit includes at least two paths respectively electrically connected to the load devices on the load module.

[0016] The present invention also discloses an installation method for a ship electrical system design system, including the following steps: Step 1: Install the devices 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 an electromagnetic isolation structure shall be made between the two power supply circuits; Step 3: Conduct one functional circuit, and disconnect the remaining power supply circuits through the electrical control cabinet.

[0017] In a further embodiment, Step 3 requires further verification. Detect whether there is current in the remaining power supply circuits through low-voltage conduction. If there is, disconnect again. If not, it is judged to be safe.

[0018] In summary, the present invention has the following beneficial effects: 1. Through the design of various usage scenarios of the module design, a perfect design can be carried out according to practical needs before starting to arrange the electrical system of the ship, avoiding the problem that when the electrical system of the ship is arranged and docked at the wharf to access external power, high-load devices cannot be safely started due to unequal usage scenarios; when adjusting the strategy, it is necessary to identify the control signals on the same line, classify them, determine the devices to be started preferentially, or the devices that need to be started collaboratively, 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, set the devices on a certain line as the motor controlling the propeller, the lights in the cab, the water temperature sensor in the cab, and the sonar. Both the sonar and the motor of the propeller are high-energy-consuming devices, and the priority of the motor of the propeller is higher than that of the sonar, the sonar is higher than the water temperature induction, and the water temperature induction is higher than the lights. When they need to be started simultaneously, at this time, set the power supply of the generator set to this line as 1000 kWh. The motor of the propeller, the lights in the cab, the water temperature sensor in the cab, and the sonar all change from the static state to the working state. When they start, they jointly require 1200 kWh of power, exceeding the power upper limit of this line. But when their working power may only be 800 - 850 kWh, then it is necessary to sort their start according to the priority. Description of the Drawings

[0019] Figure 1 is the overall process block diagram of the ship electrical system design system of the present invention; Figure 2 is the feedback control flow diagram of the strategy adjustment module of the ship electrical system design system of the present invention; Figure 3 is the line layout diagram of the installation method of the ship electrical system design system of the present invention. Detailed Embodiment

[0020] The present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Among them, the same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the Figure 1 drawing, and the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this specification, "a plurality of" means two or more unless otherwise specifically defined.

[0022] Embodiment 1: As Figure 1 - Figure 2 shown, a ship electrical system design system includes a generator set, an external power source and a load module. The generator set is electrically connected to the load module through an electrical control cabinet and a connection circuit. The electrical control cabinet is provided with an external power source interface. The electrical control cabinet is used to regulate the generator set and the external power source according to the requirements of the load module. It further includes: a design module, which is used to design the 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, a working power acquisition unit and an analysis unit. The priority evaluation unit is used to determine the priority weight value according to the usage nature of the load device. The instantaneous power acquisition unit is used to acquire the instantaneous current and voltage when the load device starts. The working power acquisition unit is used to acquire the maximum working power, the long-term working power 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 for monitoring the running state of the ship and for observing the surrounding environment of the ship. The basic device is a ship attitude adjustment device and a ship power device. The basic device includes devices such as the engine and propeller of the ship for directly driving the ship to move forward, and also includes devices for changing the running state and direction of the ship. A common feature of these devices is that they need to maintain a starting state during the operation of the ship. Among them, it includes devices such as radar, sonar, and air conditioner; the functional devices mainly include devices such as the hatch opening and closing device and the bottom transportation device of the cargo hold, which do not need to be started for a long time during the ship's movement. These devices often need to be started after the ship stops. At this time, the generator set of the ship is in a low-power operation state or even a shutdown state, and the power supply is mainly realized through the external power source. Therefore, in order to avoid the impact on the ship's basic equipment when these devices start, such as the air conditioning system, because the loading and unloading of goods takes a long time, the air conditioning system on the ship needs to run stably to maintain the operating environment of each device that needs a stable temperature inside the ship.

[0023] Therefore, at the initial stage of design, it is necessary to conduct a detailed classification and priority assessment of all load devices on the ship. Through the priority assessment unit in the design module, the weight value is determined according to the device function and usage nature. For example: basic devices (priority level 1): ship engines, propellers, attitude adjustment devices, radars, air conditioning systems, etc.; functional devices (priority level 2): cargo hold transportation devices, hatch opening and closing devices, deck lighting systems, etc. The instantaneous power acquisition unit collects the current and voltage data when the device starts. For example, the instantaneous power of the radar when starting is 300kW, and that of the air conditioner is 200kW; the working power acquisition unit records the long-term power range (such as the long-term power of the radar is 150kW, and that of the air conditioner is 120kW). And calculate its output according to the actual usage scenarios of these devices, generate a power demand table for load devices, and allocate it to different bus lines according to the priority weight value. For example, connect the basic devices to the main bus (priority line), and the functional devices to the standby bus. Each load device needs to be connected to at least two independent power supply circuits and configured with an electromagnetic isolation structure. For example, the ship engine is connected to the generator set and the external power supply interface through two independent lines, and a magnetic ring isolator is set between the lines to avoid electromagnetic interference. Bus hierarchical design: The main bus (line A) carries devices with priority level 1, and the standby bus (line B) carries devices with priority level 2. The electrical control cabinet realizes line switching through a multi-way switch.

[0024] Such as Figure 1 - Figure 2As shown, a verification module is used to verify the adjustment time and safety indicators of the generator set and the external power supply in response to load demands. 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 starts at full power. If they meet the conditions, no alarm is issued; if not, an alarm is issued. The instantaneous power verification unit is used to verify whether the circuit is overloaded when the load devices in each line start instantaneously. If it is overloaded, an alarm is issued; if it does not exceed the limit, 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 it exceeds, an alarm is issued; if it does not exceed, no alarm is issued. Redundant design is carried out to ensure that each load branch in the connected circuit will not malfunction due to the instantaneous start of the load devices connected to it. Specifically, the verification module mainly includes: full-power verification. Full-power verification requires starting all load devices to the full-power operation state, and monitoring the output stability of the generator set and the 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 devices (such as deck lighting), and evaluates the test results. If the output fluctuation of the generator set is less than ±5% and the switching response time of the external power supply is less than 0.5 seconds, it is determined to be qualified, and the formulation basis of the safety indicators (such as the voltage fluctuation threshold) refers to the international standard IEC60092.

[0025] In addition, the verification module also includes the verification of instantaneous power. For example, when simulating the simultaneous start of the radar and the air conditioner, the instantaneous power demand is 500kW. The instantaneous power verification unit detects whether the line is overloaded. If the line rating is 400kW, the system triggers an alarm and activates a voltage reduction strategy (such as starting the radar and the air conditioner at different times). At this time, it is necessary to adjust the radar start timing and start the air conditioner 0.2 seconds later to ensure that the instantaneous power peak is reduced to within 400kW, so that the radar system and the air conditioner start separately.

[0026] Because it needs to be used in different scenarios, it is also necessary to verify the power supply switching, including abnormal fluctuation testing: during the switching process between the generator set and the external power supply, monitor the voltage fluctuation of the load module. If the fluctuation exceeds the design standard (±10%), the switching verification unit triggers a protection mechanism to preferentially maintain the power supply of basic equipment; it also includes electromagnetic isolation verification: use an oscilloscope to detect the electromagnetic interference intensity of the standby line to ensure that the isolation structure effectively suppresses high-frequency noise.

[0027] Such as Figure 1 - Figure 2As shown, a policy adjustment module is provided. The policy adjustment module is used to adjust the power supply of the generator set and the external power supply according to the load demand. The policy adjustment module is used to adjust the step-down starting parameters of the requesting device that issues the load demand. The policy adjustment module includes a load device starting policy formulation unit, a power generation power policy formulation unit of the generator set, and an external power supply policy formulation unit. The load device starting policy formulation unit is used to adjust the step-down starting policy of the load device and feedback it to the generator set. The power generation power policy formulation unit is used to adjust the power generation power according to the step-down starting policy. The external power supply policy formulation unit is used to adjust the power supply power of the external power supply according to the step-down starting policy. The step-down starting policy is feedback to the generator set and the external power supply, and it can be judged whether the current step-down starting policy can operate, and whether the generator set and the external power supply can be correspondingly regulated under the current step-down starting policy. If yes, it operates; if not, the step-down starting policy is continuously adjusted. The various usage scenarios designed by the design module can be perfectly designed according to practical needs before starting to arrange the electrical system of the ship, avoiding the problem that after the electrical system of the ship is arranged, the high-load equipment cannot be safely started when the ship docks at the wharf and accesses the external power supply due to the unequal 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 problem that a single busbar power supply affects all equipment due to accidental failures when the load equipment starts. This setting enables load equipment of different importance levels to be placed on different busbar lines respectively; the connection circuit includes at least two paths that are electrically connected to the load equipment on the load module respectively; When needed, the step-down starting policy is implemented. For example, when the propeller motor and the sonar start together, the instantaneous power demand is 1200 kW (the line upper limit is 1000 kW) when they start simultaneously. The load device starting policy formulation unit adjusts the starting parameters: the propeller motor adopts soft start (step-down by 50%), and returns to full voltage after 2 seconds; the sonar starts 1 second later to avoid peak superposition. The power generation power policy formulation unit synchronously increases the output to 1100 kW, and the external power supply supplements 100 kW; at the same time, dynamic power distribution is carried out, and real-time monitoring and feedback are performed: the policy adjustment module collects load power data in real time through sensors. For example, when the cargo hold transportation device starts, the instantaneous power demand suddenly increases, and the system automatically limits the air conditioner power to 80%, releasing 200 kW of capacity for the transportation device to use.

[0028] In summary, according to the above technical solutions, the present invention is divided into two application scenarios in total: Scenario 1: External power supply access when the ship is docked: When simulating the start of the cargo hold transportation device, the external power supply needs to instantaneously provide 500 kW of power. The design module verifies whether the capacity of the external power supply interface meets the requirements and configures a step-down starting policy to reduce the impact.

[0029] Scenario 2, Full Power Sailing Mode: When all devices are started simultaneously, the total instantaneous power demand is 2500 kW (the rated power of the generator set is 2000 kW). The strategy adjustment module automatically connects to the external power supply to supplement 500 kW and delays the start of functional devices according to priority.

[0030] Specific implementation process: Set the power generation power of the ship's generator set to X megawatts. There are a total of N energy-consuming modules. The total energy consumption of each energy-consuming module is marked as WN, and the start-up instantaneous power consumption of the WN module is PN, the operating power consumption is P1N, and the maximum power consumption is P2N. Calculate the sum of the start-up instantaneous power consumptions of all energy-consuming modules that need to be started at the same time through the summation formula, and judge whether the sum value is greater than X. If it is greater, an external power supply needs to be connected. 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 devices to be started first or the devices that need 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. For example, in the design software or design manuscript, set the devices on a certain line as the motor controlling the propeller, the lights in the cab, the water temperature sensor in the cab, and the sonar. Both the sonar and the propeller motor are high-energy-consuming devices, and the priority of the propeller motor is higher than that of the sonar, the sonar is higher than the water temperature sensor, and the water temperature sensor is higher than the lights. When they need to be started simultaneously, at this time, set the power supply of the generator set to this line as 1000 kWh. The motor of the propeller, the lights in the cab, the water temperature sensor in the cab, and the sonar simultaneously change from the static state to the working state. When they start, they jointly require 1200 kWh of power, which exceeds the power limit of this line. However, when their working power may only be 800 - 850 kWh, then it is necessary to sort their start-up according to priority.

[0031] When the ship is at the port for loading and unloading, at this time, the cargo hold transportation device (200 kW) and the refrigeration compressor (150 kW) need to be started simultaneously, and the rated power of the external power supply interface is 300 kW; the system starts to respond: the verification module detects that the external power supply capacity is insufficient and triggers an alarm; The strategy adjustment module starts the step-down strategy, limits the starting current of the transportation device to 150 kW, and delays the start of the refrigeration compressor by 5 seconds; at the same time, the generator set supplements 100 kW, and the external power supply provides 200 kW.

[0032] In this case, after the adjustment is completed, the device starts successfully, and the voltage fluctuation is controlled within ±8%, without affecting the operation of basic equipment (such as the air conditioning system).

[0033] Example 2: As Figure 3As shown, for the installation method of the ship electrical system design system, the devices of the load module are respectively installed in the corresponding areas of the ship; Step 2: Connect each load device to at least two power supply circuits, and an electromagnetic isolation structure needs to be made between the two power supply circuits; Step 3: Conduct one functional circuit, disconnect the remaining power supply circuits through the electrical control cabinet, and detect whether there is current in the remaining power supply circuits through low-voltage conduction. If there is, disconnect again. If not, it is judged to be safe.

[0034] In the embodiments disclosed in the present invention, terms such as "installation", "connection", "attachment", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "attachment" can be a direct attachment or an indirect attachment through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments disclosed in the present invention can be understood according to specific circumstances.

[0035] This specific embodiment is only an interpretation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications without creative contributions to this embodiment after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. Ship electrical system design system, including 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, the electrical control cabinet is provided with an external power supply interface, and the electrical control cabinet is used to regulate the generator set and the external power supply according to the requirements of the load module, characterized in that, It further includes: a design module, which is used to design a connection circuit according to the load information of the load module; a verification module, which is used to verify the adjustment time and safety indicators when the generator set and the external power supply respond to the load demand; and a policy adjustment module, which is used to adjust the power supply power of the generator set and the external power supply according to the load demand, and the policy adjustment module is used to adjust the step-down starting parameters of the requesting device that issues the load demand.

2. The ship electrical system design system according to claim 1, wherein: The design module consists 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 value according to the usage nature of the load device. The instantaneous power acquisition unit is used to acquire the instantaneous current and voltage when the load device starts. The working power acquisition unit is used to acquire 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 operation state of the ship and to observe the surrounding environment of the ship. The basic device is the ship's own attitude adjustment device and the ship's power device.

3. 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 starts at full power. If they meet, no alarm is issued. If they do not meet, an alarm is issued. The instantaneous power verification unit is used to verify whether the circuit is overloaded when the load device in each line starts instantaneously. If it is overloaded, an alarm is issued. If it does not exceed the standard, 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 it exceeds, an alarm is issued. If it does not exceed, no alarm is issued.

4. The ship electrical system design system according to claim 1, characterized in that: The policy adjustment module includes a load device starting policy formulation unit, a power generation power policy formulation unit of the generator set, and an external power supply policy formulation unit. The load device starting policy formulation unit is used to adjust the step-down starting policy of the load device and feedback it to the generator set. The power generation power policy formulation unit is used to adjust the power generation power according to the step-down starting policy. The external power supply policy formulation unit is used to adjust the power supply power of the external power supply according to the step-down starting policy.

5. The ship electrical system design system according to claim 1, wherein: The electrical control cabinet is used to realize the coupling of the generator set / external power supply with the load module through multiple busbars.

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

7. An installation method of a ship electrical system design system according to any one of claims 1-6, characterized in that, It includes the following steps: Step 1: Install the devices of the load module in the corresponding areas of the ship respectively; Step 2: Connect each load device to at least two power supply circuits, and an electromagnetic isolation structure needs to be made between the two power supply circuits; Step 3: Conduct one functional circuit, and disconnect the remaining power supply circuits through the electrical control cabinet.

8. The installation method of the ship electrical system design system according to claim 7, characterized in that: Step 3 requires further verification. Detect whether there is current in the remaining power supply circuits through low-voltage conduction. If there is, disconnect them again. If there is no current, it is judged to be safe.

Images