Marine power supply system fault on-line monitoring system

Abstract

The invention relates to the technical field of power supply system monitoring, and provides a marine power supply system fault on-line monitoring system, which comprises a monitoring cabinet, the monitoring cabinet comprises a cabinet body and a monitoring assembly arranged in the cabinet body, and the on-line monitoring system further comprises a liquid cooling assembly used for cooling the interior of the monitoring cabinet. The liquid cooling assembly comprises a liquid flowing piece arranged in the cabinet body, the liquid flowing piece is provided with a plurality of installation grids used for installing electric devices, the interior of the liquid flowing piece is hollow and used for circulating flowing of cooling liquid, and heat conduction assemblies are further arranged in the installation grids. The heat dissipation component is used for absorbing heat generated by the electric device and conducting the heat to the cooling liquid flowing in the liquid flowing component to realize heat dissipation; the interior of the electric devices, the interior of the liquid flowing piece and the corresponding heat conduction assemblies are arranged in an attached mode, the heat conduction path is greatly shortened, the liquid cooling mode is modularly arranged, and therefore the heat dissipation timeliness and effectiveness of the electric devices in the whole area inside the main control cabinet are guaranteed, and then the function reliability of the monitoring cabinet is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of power supply system monitoring, in particular to an online fault monitoring system for a marine power supply system. Background Art

[0002] During the operation of a ship, the power supply system is its core energy guarantee. Its stability and reliability are directly related to the safe navigation of the ship and the normal operation of various equipment. Real-time and accurate online fault monitoring of the ship's power supply system is of great practical significance.

[0003] The online fault monitoring system for the ship's power supply system is core equipment for ensuring the reliable operation of the ship's power network. Its functions are highly dependent on the stable operation of the monitoring cabinet. The monitoring cabinet serves as the nerve center of the system and integrates online fault monitoring components, including electricity meters, protection devices, data acquisition controllers, extended sensor modules (such as voltage, current sensors, temperature sensors, etc.), and leakage sampling modules. These electrical components continue to generate heat during operation, causing the temperature inside the cabinet to rise. Effective heat dissipation inside the monitoring cabinet is a key prerequisite for maintaining the reliability of the system's functions. Currently, there are two main methods for heat dissipation in monitoring cabinets: liquid cooling and air cooling. For liquid cooling, the cooling pipes are usually laid along the inner wall of the cabinet or outside the electrical component installation area. The central area is too long from the cold source, the thermal resistance is significantly increased, and local high-temperature hotspots are easily formed. For air cooling, it relies on forced convection from fans. Due to the complex layout of equipment in the cabinet and the mutual obstruction between electrical components, heat dissipation dead corners are easily formed. As a result, in actual applications, the heat dissipation effect of the monitoring cabinet is poor.

[0004] Therefore, the present invention proposes an online fault monitoring system for a marine power supply system to solve the above problems. Summary of the Invention

[0005] The embodiment of the present invention aims to provide an online fault monitoring system for a marine power supply system to solve the above-mentioned problem.

[0006] To achieve the above object, the present invention provides the following technical solutions: A marine power supply system fault online monitoring system includes a monitoring cabinet, which includes a cabinet body and a monitoring component arranged in the cabinet body. The online monitoring system also includes a liquid cooling component for dissipating heat and cooling the interior of the monitoring cabinet. The liquid cooling component includes a liquid flow component arranged in the cabinet body. The liquid flow component is provided with a plurality of mounting grids for mounting electrical components. The interior of the liquid flow component is hollow for the circulation of cooling liquid. The mounting grid is also provided with a heat conducting component for absorbing heat generated by the electrical components and conducting it to the cooling liquid flowing inside the liquid flow component to achieve heat dissipation.

[0007] In an optional solution: the liquid cooling component also includes a solution cavity provided on the cabinet for accommodating the cooling liquid, a circulating pump for pumping the cooling liquid into the liquid flow part, and a heat exchanger for cooling the cooling liquid after heat exchange, and the interior of the liquid flow part is connected to the solution cavity.

[0008] In an optional solution: the cabinet includes a device area, the liquid-conducting component is arranged in the device area, the device area is located above the solution cavity, and the solution cavity is located at the bottom of the cabinet.

[0009] In an optional solution: the heat-conducting component includes a heat-absorbing sleeve arranged in the installation grid, and the heat-conducting bosses are evenly distributed on the heat-absorbing sleeve. The heat-conducting bosses seal through the side wall of the installation grid, and the end of the heat-conducting boss away from the heat-absorbing sleeve is located inside the liquid-conducting part. The electrical component is located inside the heat-absorbing sleeve and is surrounded by the heat-absorbing sleeve.

[0010] In an optional solution: the online monitoring system also includes an air cooling component for coordinated heat dissipation and cooling of the interior of the monitoring cabinet, the air cooling component includes an air inlet cavity located on the rear side of the device area and a fan for supplying air into the air inlet cavity, the area of ​​the rear side panel of the device area located in each installation grid is slidably penetrated by an air outlet duct in an array, the air outlet duct is evenly distributed with air outlet holes, and the air outlet duct is closed at one end close to the device area.

[0011] In an optional solution: a first sleeve is provided at one end of the air outlet pipe located in the air inlet chamber, a second sleeve is slidably provided in the first sleeve, the second sleeve is rotatably connected to the air outlet pipe, a spiral blade is provided in the air outlet pipe, a first magnetic block is provided at the end of the air outlet pipe, a second magnetic block and a third magnetic block are alternately provided circumferentially relative to the first magnetic block in the first sleeve, the magnetic poles of the side opposite to the second magnetic block are opposite, and the magnetic poles of the side opposite to the first magnetic block are the same.

[0012] In an optional solution: the heat exchange channel of the heat exchanger is divided into a liquid half-zone for cooling liquid flow and an air half-zone for air flow, the liquid outlet end of the circulation pump is connected to the input end of the liquid half-zone, and the air outlet end of the fan is connected to the input end of the air half-zone.

[0013] In an optional solution, a loading plate for mounting electrical components is detachably provided in the installation grid, and the loading plate is provided with through holes corresponding to the air outlet pipes one by one for the air outlet pipes to pass through and be pulled out.

[0014] In an optional solution, a column is provided in the installation grid, a sleeve for fitting with the column is provided on the loading plate, and a positioning piece for fixing the loading plate is screwed onto the column in a threaded manner.

[0015] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: Various electrical components that constitute the monitoring assembly are installed in the installation grid to realize modular installation of electrical components. When the liquid cooling assembly is working, the coolant circulates inside the liquid flow parts, absorbs the heat generated by the electrical components through the heat conduction components and conducts it to the coolant flowing inside the liquid flow parts to achieve heat dissipation and cooling. The electrical components, the inside of the liquid flow parts and the corresponding heat conduction components are arranged close to each other, which greatly shortens the heat conduction path. The liquid cooling mode is arranged in a modular manner, thereby ensuring the timeliness and effectiveness of the heat dissipation of electrical components in all areas inside the main control cabinet, thereby ensuring the functional reliability of the monitoring cabinet.

[0016] The electrical components are installed in the installation grid, and the air outlet duct that is not blocked by the electrical components is pulled forward so that the air outlet duct is located in the gap between the electrical components. Air is sent into the air inlet cavity through the fan, and then enters the pulled-up air outlet duct and is discharged through the air outlet hole. The airflow entering the air outlet duct hits the spiral blades, thereby driving the air outlet duct to rotate. The rotation of the air outlet duct drives the first magnetic block to alternately face the second magnetic block and the third magnetic block. Under the condition that like poles repel and opposite poles attract and move away, the second sleeve slides back and forth, and even when the air outlet duct rotates, it also moves back and forth longitudinally, thereby achieving the effect of blowing air to the electrical components from all directions. The heat emitted by the electric heater is blown to the heat conduction component in time through the airflow so that it can be absorbed in time and effectively, thereby achieving the technical effect of sufficient and efficient heat dissipation.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. These drawings and the accompanying description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

[0019] Figure 1 Schematic diagram of the internal structure of an embodiment of the present invention.

[0020] Figure 2 It is a front view of an embodiment of the present invention.

[0021] Figure 3 Schematic diagram of the structure of the liquid conveying part in an embodiment of the present invention.

[0022] Figure 4 It is a side sectional view of the cabinet in an embodiment of the present invention.

[0023] Figure 5Schematic diagram of the structure of the heat conduction component in an embodiment of the present invention.

[0024] Figure 6 for Figure 4 Enlarged view of point A in the middle.

[0025] Figure 7 It is a cross-sectional view between the air outlet pipe, the first sleeve and the second sleeve in an embodiment of the present invention.

[0026] Figure 8 Schematic diagram of the arrangement between the air outlet pipe, the first sleeve and the second sleeve in an embodiment of the present invention.

[0027] Figure 9 Schematic diagram of the air outlet duct and electrical components in an embodiment of the present invention.

[0028] Figure 10 4 is a radial cross-sectional view of the heat exchange channel of the heat exchanger in an embodiment of the present invention.

[0029] Figure 11 Schematic diagram of the arrangement of the loading plate, columns, sleeves and positioning members in an embodiment of the present invention.

[0030] Figure 12 for Figure 1 Enlarged view of point B in the middle.

[0031] Figure numerals: 1-cabinet, 101-device area, 2-liquid cooling assembly, 201-liquid flow component, 202-solution cavity, 203-circulation pump, 204-heat exchanger, 205-diverter, 3-installation grid, 4-heat conduction assembly, 401-heat absorption sleeve, 402-heat conduction boss, 5-air cooling assembly, 501-fan, 502-air inlet cavity, 503-first magnetic plate, 504-second magnetic plate Plate, 505-air outlet pipe, 506-air outlet hole, 507-first sleeve, 508-second sleeve, 509-slide groove, 510-bump, 511-first magnetic block, 512-second magnetic block, 513-third magnetic block, 514-iron ring, 6-loading plate, 7-cabinet door, 8-through hole, 9-column, 10-sleeve sleeve, 11-positioning piece, 12-liquid half area, 13-air half area. DETAILED DESCRIPTION

[0032] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0033] See also Figures 1 to 3A system for online monitoring of faults in a marine power supply system includes a monitoring cabinet, which includes a cabinet body 1 and a monitoring component (not shown in the figure) disposed in the cabinet body 1. The online monitoring system also includes a liquid cooling component 2 for dissipating heat and cooling the interior of the monitoring cabinet. The liquid cooling component 2 includes a liquid discharge component 201 disposed in the cabinet body 1. The liquid discharge component 201 is provided with a plurality of mounting grids 3 for mounting electrical components. The interior of the liquid discharge component 201 is hollow for circulating coolant. A heat conducting component 4 is further provided in the mounting grid 3 for absorbing heat generated by the electrical components and conducting the heat to the coolant flowing in the liquid discharge component 201 to achieve heat dissipation.

[0034] It should be noted that when the monitoring device is in use, the corresponding ship power supply system is connected to the monitoring component, which includes an electric energy meter, a protection device, a data acquisition controller, an extended sensor module (such as voltage, current sensor, temperature sensor, etc.) and a leakage sampling module. The electric energy meter measures and monitors parameters such as power consumption, current, and voltage. The data acquisition controller is the core and is responsible for collecting these data in real time. By cooperating with the extended sensor module, the leakage sampling module and other components, it realizes online monitoring of ship power supply system faults. The above is the existing technology and will not be repeated here. In addition, the installation grid 3 is provided with a variety of specifications to meet the installation requirements of electrical components of different specifications, types or groups. For example: multiple electrical components need to be installed in series in a group or the electrical components themselves are large in size and require a larger installation space, that is, a larger installation grid 3 is selected for installation. The installation grid 3 of appropriate size is selected for electrical component installation according to the layout plan of the electrical components in the cabinet and the size of the electrical components.

[0035] Various electrical components that constitute the monitoring assembly are installed in the installation grid 3 to realize modular installation of the electrical components. When the liquid cooling assembly 2 is working, the coolant circulates inside the liquid flow component 201, and the heat generated by the electrical components is absorbed by the heat conduction component and conducted to the coolant flowing inside the liquid flow component 201 to achieve heat dissipation and cooling. The electrical components, the inside of the liquid flow component 201 and the corresponding heat conduction components are arranged close to each other, which greatly shortens the heat conduction path. The liquid cooling mode is arranged in a modular manner, thereby ensuring the timeliness and effectiveness of the heat dissipation of electrical components in all areas inside the main control cabinet, thereby ensuring the functional reliability of the monitoring cabinet.

[0036] See also Figure 1 and Figure 4In one embodiment of the present invention, the liquid cooling assembly 2 further includes a liquid holding chamber 202 provided on the cabinet 1 for holding the cooling liquid, a circulating pump 203 for pumping the cooling liquid into the liquid discharge part 201, and a heat exchanger 204 for cooling the cooling liquid after heat exchange (the heat exchanger 204 is a plate heat exchanger, and its cooling medium can be low-temperature seawater or other cooling medium). The interior of the liquid discharge part 201 is connected to the solution chamber 202; the circulating pump 203 pumps the liquid in the liquid holding chamber 202 into the heat exchanger 204 to exchange heat with the cooling medium, so that the temperature of the cooling liquid is reduced, and the low-temperature cooling liquid enters the interior of the liquid discharge part 201. The cooling liquid is cooled during the process of flowing through the interior of the liquid discharge part 201. The cooling liquid absorbs heat, and the cooling liquid after absorbing heat returns to the liquid containing chamber 102, and is then pumped by the circulating pump 12 to form a liquid cooling cycle. It should be noted that the cabinet body 1 is also provided with a temperature sensor (not shown in the figure) for real-time monitoring of the temperature inside the cabinet. The temperature sensor model is WZP-230. Only when the temperature sensor detects that the temperature inside the cabinet reaches the set threshold, the liquid cooling component starts working (the control linkage between the temperature sensor and the liquid cooling component is an existing technology and there is no technical obstacle. Therefore, the specific software and hardware required to realize this function and the corresponding connections and logical relationships are not described here). If the ship sails to cold waters, the temperature inside the cabinet is low and there is no need for the liquid cooling component to intervene for heat dissipation.

[0037] Furthermore, in this embodiment, a diverter 205 is provided on the cabinet 1, and a plurality of connection points are arranged between the diverter 205 and the inside of the liquid flow part 201. A liquid guide pipe is provided between the heat exchanger 204 and the diverter 205. A plurality of connection points are also arranged inside the liquid flow part 201 and the liquid containing area 202, so that the coolant in the liquid flow part 201 flows evenly, avoiding the generation of flow dead corners and causing local heat exchange inefficiency.

[0038] Furthermore, in this embodiment, the cabinet 1 includes a device area 101, and the liquid flow component 201 is arranged in the device area 101. The device area 101 is located above the liquid cavity 202, and the liquid cavity 202 is located at the bottom of the cabinet 1. The coolant contained in the liquid cavity 202 has a large weight and acts as a "base", which is beneficial to improving the installation stability of the monitoring cabinet.

[0039] See also Figure 5In one embodiment of the present invention, the heat-conducting assembly 4 includes a heat-absorbing sleeve 401 provided in the installation grid 3, and heat-conducting bosses 402 are evenly distributed on the heat-absorbing sleeve 401. The heat-conducting bosses 402 are sealed (which can be achieved by providing a sealing ring) and pass through the side wall of the installation grid 3, and the end of the heat-conducting bosses 402 away from the heat-absorbing sleeve 401 is located inside the liquid-conducting part 201. The electrical components are located inside the heat-absorbing sleeve 401 and are surrounded by the heat-absorbing sleeve 401. The heat-absorbing sleeve 401 and the heat-conducting bosses 402 are both made of metal heat-conducting materials, such as copper, aluminum, etc. The heat generated by the electrical components is absorbed by the heat-absorbing sleeve 401, and then transferred to the inside of the liquid-conducting part 201 through the heat-conducting bosses 402 for heat exchange with the flowing coolant, thereby keeping the temperature inside the cabinet within the target safety range.

[0040] See also Figure 1 、 Figure 4 、 Figures 6 to 10 In one embodiment of the present invention, the online monitoring system further includes an air cooling component 5 for collaboratively dissipating heat and cooling the interior of the monitoring cabinet. The air cooling component 5 includes an air inlet cavity 502 provided at the rear side of the device area 101 and a fan 501 for supplying air into the air inlet cavity 502. The area of ​​the rear side panel of the device area 101 located in each installation grid 3 is slidably penetrated by an air outlet duct 505 in an array. The air outlet duct 505 is evenly distributed with air outlet holes 506. The air outlet duct 505 is closed at one end close to the device area 101. The air outlet pipe 505 is provided with a first sleeve 507 at one end located in the air inlet chamber 502, and a second sleeve 508 is slidably provided in the first sleeve 507 (at least one sliding groove 509 is provided on the inner wall of the first sleeve 507 along the axial direction of the first sleeve 507, and the second sleeve 508 is provided with a protrusion 510 that is slidably clamped in the sliding groove 509), the second sleeve 508 is rotatably connected to the air outlet pipe 505, and a spiral blade is provided in the air outlet pipe 505 (not shown in the figure), and a first magnetic block 511 is provided at the end of the air outlet pipe 505, and a second magnetic block 512 and a third magnetic block 513 are alternately provided circumferentially relative to the first magnetic block 511 in the first sleeve 507, the magnetic poles of the first magnetic block 511 and the second magnetic block 512 facing each other are opposite, and the magnetic poles of the first magnetic block 511 and the third magnetic block 513 facing each other are the same.

[0041] In this embodiment, the electrical components are installed in the installation grid 3, and the air outlet duct 505 that is not blocked by the electrical components (in the front-to-back direction, with the cabinet door 7 as the front side) is pulled forward so that the air outlet duct 505 is located in the gap between the electrical components (such as Figure 9As shown), air is supplied to the air inlet chamber 502 through the fan 501, and then enters the pulled-up air outlet pipe 505 and is discharged through the air outlet hole 506. The airflow entering the air outlet pipe 505 impacts the spiral blades, thereby driving the air outlet pipe 505 to rotate. The rotation of the air outlet pipe 505 drives the first magnetic block 511 to alternately face the second magnetic block 512 and the third magnetic block 513. Under the condition that like poles repel and opposite poles attract and move away, the second sleeve 508 slides back and forth. Even when the air outlet pipe 505 rotates, it also moves back and forth longitudinally, thereby achieving the effect of blowing air to the electrical components from all directions. The heat emitted by the electric heater is blown to the heat transfer component 4 in time through the airflow so that it can be absorbed in time and effectively, thereby achieving the technical effect of sufficient and efficient heat dissipation.

[0042] Furthermore, in this embodiment, iron rings 514 are embedded at both ends of the first sleeve 507, and the air inlet cavity 502 is provided with a first magnetic plate 503 and a second magnetic plate 504 for magnetically attracting the iron rings 514 to respectively position the air outlet pipe 505 in the pulled-out and retracted states. When the air outlet pipe 505 is pulled forward and into position, the iron ring 514 provided at the front end of the corresponding first sleeve 507 is magnetically positioned by the first magnetic plate 503, while the iron ring 514 provided at the rear end of the first sleeve 507 on the air outlet pipe 505 that has not been pulled out is magnetically positioned by the second magnetic plate 504. It should be noted that The online monitoring system also includes a push-pull tool (not shown in the figure) for pulling out the air outlet pipe 505 and pushing it back to reset it. The push-pull tool includes a thin rod and a suction cup provided at one end of the thin rod. The specific usage method is: for pulling out the air outlet pipe 505: the suction cup is used to adsorb the closed end of the air outlet pipe 505 (the closed end of the air outlet pipe 505 is a plane) through the thin rod, and then the air outlet pipe 505 is pulled out by pulling the thin rod; for pushing the air outlet pipe 505 back to reset it: the end of the thin rod that is not the suction cup is pressed against the closed end of the air outlet pipe 505, and then the thin rod is pushed to retract and reset the air outlet pipe 505.

[0043] Furthermore, in this embodiment, the heat exchange channel of the heat exchanger 204 is divided into a liquid half-zone 12 for cooling liquid flow and an air half-zone 13 for air flow (such as Figure 10 As shown), the liquid outlet end of the circulation pump 203 is connected to the input end of the liquid half-zone 12, the output end of the liquid half-zone 12 is connected to the liquid discharge component 201, the air outlet end of the fan 501 is connected to the input end of the air half-zone 13, and the output end of the air half-zone 13 is connected to the air inlet cavity 502. The airflow is cooled by the heat exchanger 204, so that the airflow entering the air inlet cavity 502 is a cold airflow, thereby improving the air-cooling and heat dissipation effect.

[0044] See also Figure 1 、 Figure 11 and Figure 12In one embodiment of the present invention, a mounting plate 6 for mounting electrical components is detachably provided in the mounting grid 3 , and a through hole 8 is provided on the mounting plate 6 , which corresponds to the air outlet pipe 505 and allows the air outlet pipe 505 to pass through and be pulled out. The installation grid 3 is provided with a column 9, the loading plate 6 is provided with a sleeve 10 for fitting with the column 9, and a positioning piece 11 for fixing the loading plate 6 is screwed onto the column 9 in a threaded manner.

[0045] In this embodiment, in order to facilitate the installation of electrical components and subsequent maintenance, replacement and other operations, the positioning piece 11 is first unscrewed, and then the sleeve 10 is held in hand to pull the loading plate 6 out of the installation grid 3, and the corresponding operation is performed outside the installation grid 3, without being restricted by the space of the installation grid 3, thereby facilitating the operation. After the operation is completed, the sleeve 10 is put on the column 9 and pushed backward into place (the loading plate 6 contacts and abuts the rear side of the device area 101), and then the positioning piece 11 is screwed on the column 9 and tightened to fix the loading plate 6.

[0046] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A ship power supply system fault online monitoring system, comprising a monitoring cabinet, the monitoring cabinet comprising a cabinet body (1) and a monitoring component arranged in the cabinet body (1), the online monitoring system further comprising a liquid cooling component (2) for dissipating heat and cooling the interior of the monitoring cabinet, characterized in that: The liquid cooling assembly (2) comprises a liquid flow member (201) arranged in the cabinet (1); a plurality of mounting grids (3) for mounting electrical components are provided on the liquid flow member (201); the interior of the liquid flow member (201) is hollow for circulation of cooling liquid; a heat conducting assembly (4) is further provided in the mounting grid (3) for absorbing heat generated by the electrical components and conducting the heat to the cooling liquid flowing inside the liquid flow member (201) to achieve heat dissipation.

2. The on-line monitoring system for faults of a marine power supply system according to claim 1, characterized in that: The liquid cooling assembly (2) further comprises a solution cavity (202) provided on the cabinet (1) for accommodating cooling liquid, a circulation pump (203) for pumping cooling liquid into the interior of the liquid discharge component (201), and a heat exchanger (204) for cooling the cooling liquid after heat exchange, wherein the interior of the liquid discharge component (201) is in communication with the solution cavity (202).

3. The on-line monitoring system for faults of a marine power supply system according to claim 2, characterized in that: The cabinet (1) comprises a device area (101), the liquid flow part (201) is arranged in the device area (101), the device area (101) is located above the solution cavity (202), and the solution cavity (202) is located at the bottom of the cabinet (1).

4. The on-line monitoring system for faults of a marine power supply system according to claim 1, characterized in that: The heat-conducting assembly (4) includes a heat-absorbing sleeve (401) arranged in the installation grid (3), and heat-conducting bosses (402) are evenly distributed on the heat-absorbing sleeve (401). The heat-conducting bosses (402) are sealed and penetrate the side wall of the installation grid (3), and the end of the heat-conducting bosses (402) away from the heat-absorbing sleeve (401) is located inside the liquid-conducting part (201). The electrical component is located inside the heat-absorbing sleeve (401) and is surrounded by the heat-absorbing sleeve (401).

5. The on-line monitoring system for faults of a marine power supply system according to claim 3, characterized in that: The online monitoring system further comprises an air cooling assembly (5) for collaboratively dissipating heat and cooling the interior of the monitoring cabinet, the air cooling assembly (5) comprising an air inlet cavity (502) arranged at the rear side of the device area (101) and a fan (501) for supplying air into the air inlet cavity (502), an area of ​​the rear side panel of the device area (101) located in each installation grid (3) is provided with an array of sliding air outlet ducts (505), air outlet holes (506) are evenly distributed on the air outlet ducts (505), and one end of the air outlet duct (505) close to the device area (101) is closed.

6. The on-line monitoring system for faults of a marine power supply system according to claim 5, characterized in that: The air outlet pipe (505) is provided with a first sleeve (507) at one end thereof in the air inlet chamber (502); a second sleeve (508) is slidably provided in the first sleeve (507); the second sleeve (508) is rotatably connected to the air outlet pipe (505); a spiral blade is provided in the air outlet pipe (505); a first magnetic block (511) is provided at the end of the air outlet pipe (505); a second magnetic block (512) and a third magnetic block (513) are alternately provided in the first sleeve (507) in a circumferential direction relative to the first magnetic block (511); the magnetic poles of the first magnetic block (511) and the second magnetic block (512) on the opposite side are opposite, and the magnetic poles of the first magnetic block (511) and the third magnetic block (513) on the opposite side are the same.

7. The on-line monitoring system for faults of a marine power supply system according to claim 5, characterized in that: The heat exchange channel of the heat exchanger (204) is divided into a liquid half-zone (12) for cooling liquid flow and an air half-zone (13) for air flow, the liquid outlet of the circulation pump (203) is connected to the input end of the liquid half-zone (12), and the air outlet of the fan (501) is connected to the input end of the air half-zone (13).

8. The on-line monitoring system for faults of a marine power supply system according to claim 5, characterized in that: A loading plate (6) for mounting electrical components is detachably provided in the installation grid (3), and penetration holes (8) corresponding one to one with the air outlet pipes (505) are arranged on the loading plate (6) for the air outlet pipes (505) to pass through and be pulled out.

9. The on-line monitoring system for faults of a marine power supply system according to claim 8, characterized in that: The installation grid (3) is provided with a column (9), the loading plate (6) is provided with a sleeve (10) for fitting with the column (9), and the column (9) is provided with a positioning piece (11) for fixing the loading plate (6) by screwing it in a threaded manner.

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