Design method of lightweight offshore booster station diesel generator system

Abstract

The invention discloses a design method of a lightweight offshore booster station diesel generator system, and belongs to the technical field of offshore booster station design. Comprising the steps of determining an island operation mode of the offshore booster station; under the island operation mode of the offshore booster station, calculating the calculated load of a diesel generator in a diesel generator system, the rated capacity of an oil storage tank, the size of a diesel engine room and the size between diesel tanks; calculating the rated power of the diesel generator; determining an arrangement mode between the diesel engine room and the diesel tank; according to the rated capacity of the oil storage tank, the rated power of the diesel generator and the arrangement mode between the diesel engine room and the diesel tank, the design result of the lightweight offshore booster station diesel generator system is obtained. The island operation mode can be determined, the rated power of the diesel generator can be accurately calculated, the capacity of the oil storage tank can be accurately calculated, the size between the diesel engine room and the diesel tank and the equipment arrangement scheme are optimized, and the reliability, economy and space utilization rate of the system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of offshore booster station design, in particular to a design method of a lightweight offshore booster station diesel generator system. BACKGROUND

[0002] The offshore booster station is a key facility of the offshore wind farm, and undertakes the important functions of power collection, voltage increase and transmission. The offshore booster station is the "core" of the offshore wind farm project, and its safe operation is very important. A scientific and reasonable station power system can provide a solid guarantee for the stable operation of the offshore booster station. The offshore booster station generally sets two station transformers as standby for work power supply. When both work power supplies of the whole station fail and are out of operation, the emergency power supply is the last line of defense to ensure the safe operation of the offshore booster station. The emergency power supply generally adopts a fast-starting diesel generator set. When the whole station loses power, the diesel generator set and the 0.4kV emergency section provide AC security power supply for emergency loads and important loads.

[0003] The current conventional offshore booster station diesel generator system design has the following defects: first, the offshore booster station island operation mode is divided vaguely, and the operation boundary is not clearly defined in combination with the actual working condition of the offshore booster station, resulting in that the offshore booster station island operation mode is not accurately adapted to the operation demand of the power grid and the offshore wind turbine; second, the rated power calculation of the diesel generator only considers the conventional security load, and does not fully consider the maintenance load and temporary rest room load when the whole station loses power, and the capacity verification calculation is not perfect, which is prone to problems of insufficient power or excessive redundancy; third, the oil tank capacity design does not consider the emergency security load power supply time and daily operation and maintenance oil consumption, and the oil tank capacity is too large, which increases the space occupation and cost; fourth, the size design between the diesel engine room and the diesel tank lacks accurate basis, the daily oil tank and the daily oil tank are separately set, the equipment arrangement is unreasonable, the oil supply and return pipeline routing planning is complex, and the system safety and operation convenience are affected. SUMMARY

[0004] The present application aims to overcome the deficiencies in the prior art, and provides a design method of a lightweight offshore booster station diesel generator system, which can solve the problems in the prior art, improve the reliability, economy and space utilization rate of the offshore booster station diesel generator system, and reduce the weight and cost of the system.

[0005] To achieve the above-mentioned purpose, the present application is realized by adopting the following technical scheme:

[0006] The present application provides a design method of a lightweight offshore booster station diesel generator system, comprising:

[0007] Obtaining the actual operation condition of the offshore booster station and the operation data of the diesel generator system;

[0008] determining an island operation mode of the offshore booster station according to an actual operation condition of the offshore booster station;

[0009] In the island operation mode of the offshore booster station, according to operation data of the diesel generator system, a calculated load of a diesel generator in the diesel generator system, a rated capacity of an oil storage tank, a diesel engine room size, and a diesel tank room size are obtained;

[0010] According to the calculated load of the diesel generator, a rated power of the diesel generator is obtained;

[0011] According to the diesel engine room size and the diesel tank room size, a layout mode of the diesel engine room and the diesel tank room is determined;

[0012] According to the rated capacity of the oil storage tank, the rated power of the diesel generator, and the layout mode of the diesel engine room and the diesel tank room, a design result of a lightweight offshore booster station diesel generator system is obtained.

[0013] Optionally, the actual operation condition of the offshore booster station includes a connection mode of the offshore booster station and a land power grid, an operation failure probability of the land power grid, and an emergency capability of the offshore wind turbine.

[0014] Optionally, the calculated load of the diesel generator is represented as:

[0015] ;

[0016] wherein, represents the calculated load of the diesel generator; represents a load conversion coefficient; represents a rated power of simultaneously operated security load; represents a maintenance load rated power; represents a temporary rest room load rated power.

[0017] Optionally, the calculation of the rated capacity of the oil storage tank includes:

[0018] ;

[0019] ;

[0020] ;

[0021] wherein, represents the rated capacity of the oil storage tank; represents an oil storage tank capacity reservation coefficient; represents an emergency condition oil consumption value; represents a daily operation and maintenance condition oil consumption value; represents the rated power of the simultaneously operated security load; represents the maintenance load rated power; represents the temporary rest room load rated power; represents the power of the trial run under the daily operation and maintenance condition; represents the maximum operation time of the security load under the emergency condition; represents the maximum operation time of the maintenance load under the emergency condition; represents the maximum operation time of the temporary rest room load under the emergency condition; represents the maximum operation time per month under the daily operation and maintenance condition; represents the fuel consumption rate of the diesel generator; represents the interval month number of the planned oil supply to the offshore booster station under the normal operation condition.

[0022] Optionally, the calculation of the diesel engine room size comprises:

[0023] ;

[0024] wherein, represents the width of the diesel engine room; represents the width of the diesel generator set; represents the width of the maintenance passage on both sides of the diesel generator set; represents the length of the diesel engine room; represents the length of the diesel generator set; represents the installation spacing between the engine side of the diesel generator set and the wall; represents the width of the maintenance passage on the generator side of the diesel generator set.

[0025] Optionally, the calculation of the diesel tank room size comprises:

[0026] ;

[0027] wherein, represents the width of the diesel tank room; represents the width of the oil storage tank; represents the width of the maintenance passage on both sides of the oil storage tank; represents the length of the diesel tank room; represents the length of the oil storage tank; represents the width of the maintenance passage on both sides of the oil storage tank.

[0028] Optionally, the calculation of the rated power of the diesel generator comprises:

[0029] ;

[0030] ;

[0031] ;

[0032] wherein, represents the rated capacity of the diesel generator; represents the calculated load of the diesel generator; represents the interval month number of planned oil supply to the offshore booster station in the normal operation condition; represents the starting current multiple of the maximum single diesel generator of the offshore booster station; represents the load conversion coefficient; represents the short-time overload coefficient; represents the maximum power of the single diesel generator of the offshore booster station; represents the rated power of the diesel generator; represents the active power of the calculated load; represents the power factor of the calculated load.

[0033] Optionally, the determination of the arrangement mode between the diesel engine room and the diesel tank comprises:

[0034] designing the diesel engine room and the diesel tank according to the size of the diesel engine room;

[0035] arranging the diesel engine room and the diesel tank adjacently, arranging the diesel generator set in the center of the diesel engine room, and arranging the oil storage tank in the center of the diesel tank;

[0036] installing the air inlet louver on one side of the diesel engine room and the air outlet louver on the other side of the diesel engine room, wherein the air outlet louver is located on the outlet side of the diesel generator set; installing the primary outlet line cabinet of the diesel generator and the control screen of the diesel generator on two sides of the diesel generator set respectively; installing the exhaust pipe on the top of the diesel generator set, wherein the exhaust pipe is connected with the silencer, penetrates the diesel engine room and communicates with the outside of the room; the exhaust pipe is installed on the top of the diesel engine room through the support hanger, and the exhaust pipe outside the room is provided with a preset distance from the cable bridge;

[0037] combining the oil storage tank and the daily-use oil tank, arranging the oil retaining ridge on the ground around the diesel generator set and the oil storage tank, connecting the oil outlet of the oil storage tank with the oil inlet of the diesel generator set through the diesel engine oil supply pipe, and connecting the oil outlet of the diesel generator set with the oil inlet of the oil storage tank through the diesel engine oil return pipe.

[0038] Compared with the prior art, the present application has the following beneficial effects:

[0039] The present application can determine the island operation mode, accurately calculate the rated power of the diesel generator, accurately calculate the oil storage tank capacity, optimize the size of the diesel engine room and the size between the diesel tank and the equipment arrangement scheme between the diesel engine room and the diesel tank, accurately adapt to the power grid and fan operation requirements, reduce the number of equipment and space occupation, thereby improving the reliability, economy and space utilization of the offshore booster station diesel generator system, and reducing the weight and cost of the system. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The flowchart of the design method of the lightweight offshore booster station diesel generator system is shown in one embodiment of the present application.

[0041] Figure 2 The arrangement structure of the diesel engine room and the diesel tank is shown in one embodiment of the present application.

[0042] Figure 3 The structure of the diesel engine room is shown in one embodiment of the present application.

[0043] Figure 4 The structure of the diesel tank is shown in one embodiment of the present application.

[0044] In the figure: 1, diesel generator set; 2, diesel generator primary outgoing line cabinet; 3, diesel generator control screen; 4, air inlet louver; 5, air outlet louver; 6, diesel generator set oil retaining dam; 7, diesel engine oil supply pipe; 8, diesel engine oil return pipe; 9, oil storage tank; 10, oil storage tank oil retaining dam; 11, silencer; 12, exhaust pipe; 13, cable bridge; 14, support hanger. DETAILED DESCRIPTION

[0045] The technical solutions of the present application will be described in detail below with reference to the drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0046] The term "and / or", only describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent three cases of A alone, A and B together, and B alone. In addition, the character " / ", generally represents that the associated objects before and after are in an "or" relationship.

[0047] Embodiment 1

[0048] This embodiment introduces a design method of a lightweight offshore booster station diesel generator system, which comprises:

[0049] obtaining actual operation conditions of the offshore booster station and operation data of the diesel generator system;

[0050] determining an island operation mode of the offshore booster station according to the actual operation conditions of the offshore booster station;

[0051] under the island operation mode of the offshore booster station, obtaining a calculated load of a diesel generator in the diesel generator system, a rated capacity of an oil storage tank, a diesel engine room size, and a diesel tank room size according to the operation data of the diesel generator system;

[0052] obtaining a rated power of the diesel generator according to the calculated load of the diesel generator;

[0053] determining a layout mode of the diesel engine room and the diesel tank room according to the diesel engine room size and the diesel tank room size;

[0054] obtaining a design result of the lightweight offshore booster station diesel generator system according to the rated capacity of the oil storage tank, the rated power of the diesel generator, and the layout mode of the diesel engine room and the diesel tank room.

[0055] The embodiment can determine the island operation mode, accurately calculate the rated power of the diesel generator, accurately calculate the capacity of the oil storage tank, optimize the sizes of the diesel engine room and the diesel tank room, and optimize the layout scheme of the equipment in the diesel engine room and the diesel tank room, accurately adapt to the operation requirements of the power grid and the wind turbine, and reduce the number and space occupation of the equipment, thereby improving the reliability, economy, and space utilization rate of the offshore booster station diesel generator system, and reducing the weight and cost of the system.

[0056] Embodiment 2

[0057] As shown in Figure 1 , the embodiment introduces a design method of a lightweight offshore booster station diesel generator system, including the following steps:

[0058] Step 1: obtaining actual operation conditions of the offshore booster station and operation data of the diesel generator system, specifically:

[0059] The actual operation conditions of the offshore booster station include a connection mode of the offshore booster station and the onshore power grid, an operation failure probability of the onshore power grid, and an emergency capacity of the offshore wind turbine, the connection reliability of the offshore booster station and the onshore power grid is determined by analyzing the installation mode of the offshore wind farm transmission line, the operation failure probability of the onshore power grid is determined by analyzing the historical power failure data of the onshore power grid, and the emergency capacity of the offshore wind turbine is determined by analyzing the capacity and power supply time of the internal battery and UPS power supply of the offshore wind turbine.

[0060] The diesel generator system includes a diesel engine room composed of diesel generators and a diesel tank room composed of oil storage tanks, and the operation data of the diesel generator system includes the rated power of the simultaneously operated security load , rated power of the security load , rated power of the temporary rest room load , power of the trial operation under the daily operation and maintenance condition , maximum power of the single diesel generator of the offshore booster station , maximum running time of the security load under the emergency condition , maximum running time of the maintenance load under the emergency condition , maximum running time of the temporary rest room load under the emergency condition , maximum running time per month under the daily operation and maintenance condition , fuel consumption rate of the diesel generator , interval month number of the planned oil supply to the offshore booster station under the normal operation condition , oil consumption value under the emergency condition , oil consumption value under the daily operation and maintenance condition , width of the diesel generator set , width of the maintenance passage on both sides of the diesel generator set , length of the diesel generator set , installation distance between the engine side of the diesel generator set and the wall , width of the maintenance passage on the generator side of the diesel generator set , width of the oil storage tank , width of the maintenance passage on both sides of the oil storage tank , length of the oil storage tank width of the maintenance passage on both sides of the oil storage tank ;

[0061] , wherein the rated power of the simultaneously running security load , rated power of the maintenance load , rated power of the temporary rest room load , power of the trial operation under the daily operation and maintenance condition , maximum power of the single diesel generator of the offshore booster station , maximum running time of the security load under the emergency condition , maximum running time of the maintenance load under the emergency condition , maximum running time of the temporary rest room load under the emergency condition , maximum running time per month under the daily operation and maintenance condition , maximum running time per month under the daily operation and maintenance condition , fuel consumption rate of the diesel generator ; oil consumption value under the emergency condition , oil consumption value under the daily operation and maintenance condition , width of the diesel generator set Maintenance passage width on both sides of the diesel generator set Length of the diesel generator set Installation distance between the engine side of the diesel generator set and the wall Maintenance passage width on the generator side of the diesel generator set Width of the oil storage tank Maintenance passage width on both sides of the oil storage tank Length of the oil storage tank Maintenance passage width on both sides of the oil storage tank The unit is m.

[0062] Step two: determine the island operation mode of the offshore booster station, specifically:

[0063] According to the actual operation condition of the offshore booster station, the island operation mode of the offshore booster station is determined, including small island operation mode and large island operation mode. According to the connection mode of the offshore booster station and the onshore power grid, the operation failure probability of the onshore power grid, and the emergency capacity of the offshore wind turbine, the specific island operation mode is analyzed and determined.

[0064] Step three: calculate the rated power of the diesel generator, specifically:

[0065] Under the island operation mode of the offshore booster station, according to the operation data of the diesel generator system, the calculation load of the diesel generator in the diesel generator system is obtained, and the calculation load of the diesel generator is expressed as:

[0066] ;

[0067] Wherein, the load conversion coefficient, the calculation load of the diesel generator The unit is kVA.

[0068] According to the calculation load of the diesel generator, the rated power of the diesel generator is obtained, and the rated power of the diesel generator The calculation includes:

[0069] ;

[0070] ;

[0071] ;

[0072] Wherein, The rated capacity of the diesel generator; The starting current multiple of the largest single diesel generator of the offshore booster station; The load conversion coefficient; represents a short-time overload coefficient; represents the active power of the calculation load; represents the power factor of the calculation load.

[0073] The rated power of the diesel generator obtained at this time is a value range, and the final rated power of the diesel generator is determined according to the capacity verification result .

[0074] Step four: calculating the rated capacity of the oil storage tank, specifically:

[0075] In the island operation mode of the offshore booster station, according to the operation data of the diesel generator system, the rated capacity of the oil storage tank in the diesel generator system is obtained, and the calculation of the rated capacity of the oil storage tank includes:

[0076] ;

[0077] ;

[0078] ;

[0079] wherein, represents the oil storage tank capacity reservation coefficient.

[0080] The rated capacity of the oil storage tank obtained at this time is a value range, and the final rated capacity of the oil storage tank is determined according to the capacity verification result .

[0081] Step five: calculating the diesel engine room size, specifically:

[0082] In the island operation mode of the offshore booster station, according to the operation data of the diesel generator system, the size of the diesel engine room in the diesel generator system is obtained, and the length and width of the diesel engine room satisfy:

[0083] ;

[0084] wherein, represents the width of the diesel engine room, in m; represents the length of the diesel engine room, in m.

[0085] The length and width of the diesel engine room obtained at this time are a value range, and the final length and width of the diesel engine room are determined according to the size verification result , .

[0086] Step six: calculating the diesel tank size, specifically:

[0087] In the island operation mode of the offshore booster station, according to the operation data of the diesel generator system, the size of the diesel tank room in the diesel generator system is obtained, and the length and width of the diesel tank room satisfy:

[0088] ;

[0089] wherein, represents the width of the diesel tank room, in units of m; represents the length of the diesel tank room, in units of m.

[0090] The length and width of the diesel tank room obtained at this time are a value range, and the final length and width of the diesel tank room are determined by comprehensively checking the size 、 .

[0091] Step seven: determine the arrangement mode of the diesel engine room and the diesel tank room, specifically:

[0092] According to the size of the diesel engine room, the diesel engine room and the diesel tank room are designed.

[0093] As shown in Figure 2 , the diesel engine room and the diesel tank room are arranged adjacent to each other, the diesel generator set 1 is arranged in the center of the diesel engine room, and the oil storage tank 9 is arranged in the center of the diesel tank room;

[0094] The diesel generator primary outlet cabinet 2 and the diesel generator control screen 3 are respectively installed on both sides of the diesel generator set 1, which is convenient for installation and wiring; the air inlet louver 4 is installed on one side of the diesel engine room, and the air outlet louver 5 is installed on the other side of the diesel engine room, and the air outlet louver 5 is located on the outlet side of the diesel generator set 1, and the air inlet louver 4 and the air outlet louver 5 form air ventilation convection; the exhaust pipe 12 is installed on the top of the diesel generator set 1, and the exhaust pipe 12 is connected with the silencer 11, then penetrates the diesel engine room and communicates with the outside of the room, and the exhaust temperature is controlled within a specified range; the diesel generator set oil dam 6 is arranged on the ground around the diesel generator set 1, and an oil drain floor drain is arranged;

[0095] The oil storage tank 9 is arranged in order according to the width of the maintenance passage and the wall of the diesel tank room, and the oiling tray is arranged in front of the oil storage tank 9, and an explosion-proof axial flow fan, a combustible gas detector and a fire extinguisher are provided; the oil storage tank oil dam 10 is arranged on the ground around the oil storage tank 9, and an oil drain floor drain is arranged;

[0096] In the embodiment, the oil storage tank and the daily use tank are combined, and no separate daily use tank and daily use tank room are arranged; the distance between the diesel generator set and the surrounding wall and the distance between the oil storage tank and the surrounding wall meet the requirement of the width of the maintenance passage;

[0097] The oil outlet of the oil storage tank 9 is connected with the oil inlet of the diesel generator set 1 through the diesel engine oil supply pipe 7, and the oil outlet of the diesel generator set 1 is connected with the oil inlet of the oil storage tank 9 through the diesel engine oil return pipe 8; a filter and a stop valve are arranged on the diesel engine oil supply pipe 7, and a one-way valve is arranged on the diesel engine oil return pipe 8, so as to ensure the sealing and safety of the pipeline.

[0098] As shown in Figure 3 , the diesel generator set 1 is arranged on the base, and the outlet side of the diesel generator set 1 is connected with the exhaust louver 5; the primary outlet cabinet 2 of the diesel generator is arranged on the body of the diesel generator set 1 and adopts a lower outlet mode and is connected with the lower cable channel; the exhaust pipe 12 is installed on the top of the diesel generator set 1 and is connected with the silencer 11 and then leads to the outside of the room; the exhaust pipe 12 is installed below the roof of the diesel engine house by the support hanger 14; the exhaust pipe 12 located outside the room is kept a certain distance from the cable bridge 13 outside the room, and the distance can be considered according to the 400mm clear distance.

[0099] As shown in Figure 4 , the oil storage tank 9 is connected with the diesel engine oil supply pipe 7 and the diesel engine oil return pipe 8; the oil outlet at the bottom of the oil storage tank 9 is connected with the oil inlet of the diesel generator set 1 through the diesel engine oil supply pipe 7, and the oil outlet of the diesel generator set 1 is connected with the oil inlet at the top of the oil storage tank 9 through the diesel engine oil return pipe 8.

[0100] Step eight: designing a lightweight offshore booster station diesel generator system, specifically:

[0101] According to the rated capacity of the oil storage tank in the diesel generator system, the rated power of the diesel generator, and the arrangement mode between the diesel engine room and the diesel tank, the design result of the lightweight offshore booster station diesel generator system is obtained.

[0102] Through the design method, the offshore booster station diesel generator system meets the operation requirements of emergency working conditions and daily operation and maintenance working conditions, the power matching is accurate, the space utilization is reasonable, the operation is safe and reliable, and the weight and cost of the offshore booster station diesel generator system can be reduced.

[0103] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative but not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A design method for a lightweight offshore substation diesel generator system, characterized in that, include: Obtain actual operating conditions of offshore substations and operating data of diesel generator systems; The island operation mode of the offshore substation is determined based on the actual operating conditions of the offshore substation. In the isolated operation mode of the offshore substation, based on the operating data of the diesel generator system, the calculated load of the diesel generator, the rated capacity of the fuel tank, the dimensions of the diesel engine room, and the dimensions of the diesel tank room are obtained. The rated power of the diesel generator is obtained based on the calculated load of the diesel generator. The layout of the diesel engine room and diesel tank room shall be determined based on the dimensions of the diesel engine room and the diesel tank room. Based on the rated capacity of the oil storage tank, the rated power of the diesel generator, and the layout of the diesel engine room and diesel tank room, the design results of the lightweight offshore booster station diesel generator system are obtained.

2. The design method for the lightweight offshore substation diesel generator system according to claim 1, characterized in that, The actual operating conditions of the offshore substation include the connection method between the offshore substation and the onshore power grid, the probability of onshore power grid failure, and the emergency response capability of the offshore wind turbines.

3. The design method for the lightweight offshore substation diesel generator system according to claim 1, characterized in that, The calculated load of the diesel generator is expressed as follows: ； in, This indicates the calculated load of the diesel generator; Indicates the load conversion factor; Indicates the rated power of the security loads operating simultaneously; Indicates the rated power of the maintenance load; This indicates the rated power of the temporary rest area.

4. The design method of the lightweight offshore substation diesel generator system according to claim 1, characterized in that, The calculation of the rated capacity of the oil storage tank includes: ； ； ； in, Indicates the rated capacity of the oil storage tank; This indicates the oil tank capacity reserve factor; This indicates the fuel consumption value under emergency operating conditions; This indicates the fuel consumption value under routine operation and maintenance conditions. Indicates the rated power of the security loads operating simultaneously; Indicates the rated power of the maintenance load; Indicates the rated power of the temporary rest room; This indicates the power output during trial operation under routine maintenance conditions. Indicates the maximum operating time of the security load under emergency conditions; Indicates the maximum operating time of the maintenance load under emergency conditions; This indicates the maximum operating time of the temporary rest area under emergency conditions; This indicates the maximum monthly uptime under normal operating conditions; Indicates the fuel consumption rate of a diesel generator; This indicates the number of months between planned refueling trips to the offshore substation under normal operating conditions.

5. The design method for a lightweight offshore substation diesel generator system according to claim 1, characterized in that, The calculation of the diesel engine room dimensions includes: ； in, Indicates the width of the diesel engine room; Indicates the width of the diesel generator set; This indicates the width of the maintenance access on both sides of the diesel generator set; Indicates the length of the diesel engine room; Indicates the length of the diesel generator set; This indicates the installation distance between the engine side of the diesel generator set and the wall; This indicates the width of the maintenance access on the generator side of the diesel generator set.

6. The design method of the lightweight offshore substation diesel generator system according to claim 1, characterized in that, The calculation of the diesel tank room dimensions includes: ； in, Indicates the width between diesel tanks; Indicates the width of the oil storage tank; This indicates the width of the maintenance passages on both sides of the oil storage tank; Indicates the length of the diesel tank compartment; Indicates the length of the oil storage tank; This indicates the width of the maintenance access channels on both sides of the oil storage tank.

7. The design method for a lightweight offshore substation diesel generator system according to claim 1, characterized in that, The calculation of the rated power of the diesel generator includes: ； ； ； in, This indicates the rated capacity of the diesel generator; This indicates the calculated load of the diesel generator; This indicates the number of months between planned refueling trips to the offshore substation under normal operating conditions. This indicates the starting current multiple of the largest single diesel generator at the offshore substation; Indicates the load conversion factor; Indicates the short-time overload factor; This indicates the maximum power of a single diesel generator at the offshore substation. This indicates the rated power of the diesel generator; This represents the active power of the calculated load; This represents the power factor of the calculated load.

8. The design method of the lightweight offshore substation diesel generator system according to claim 1, characterized in that, The determination of the layout of the diesel engine room and diesel tank room includes: Design the diesel engine room and diesel tank room according to the dimensions of the diesel engine room; The diesel engine room and the diesel tank room are arranged adjacent to each other, the diesel generator set is arranged in the center of the diesel engine room, and the fuel tank is arranged in the center of the diesel tank room. An air inlet louver is installed on one side of the diesel engine room, and an air outlet louver is installed on the other side of the diesel engine room. The air outlet louver is located on the outlet side of the diesel generator set. The primary output cabinet and the control panel of the diesel generator set are installed on both sides of the diesel generator set. The exhaust pipe is installed on the top of the diesel generator set. After being connected to the muffler, the exhaust pipe runs through the diesel engine room and connects to the outside of the room. The exhaust pipe is installed on the top of the diesel engine room through a support bracket. The exhaust pipe located outside the room is at a preset distance from the cable tray. The oil storage tank and the daily fuel tank are combined. Oil baffles are installed on the ground around the diesel generator set and the oil storage tank. The oil outlet of the oil storage tank is connected to the oil inlet of the diesel generator set through the diesel engine's fuel supply pipe. The oil outlet of the diesel generator set is connected to the oil inlet of the oil storage tank through the diesel engine's return pipe.

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