Redundant structure and control method of lubrication system for high-power wind turbine generator sets

Abstract

The present invention relates to the field of wind power generation technology, and specifically to a redundant structure and control method of a lubrication system for a large-power wind power generator set, including at least two lubrication systems for generator set bearings, both of which lubricate the bearings of the generator, and each lubrication branch corresponds to half of the lubrication points of the lubricating bearings; and at least two lubrication systems for variable pitch bearings, both of which lubricate the variable pitch bearings, and each lubrication branch corresponds to half of the lubrication points of the lubricating variable pitch bearings. The present invention provides lubricating grease by arranging at least two lubrication branches at the bearings, so that even if one of the lubrication branches fails and stops providing lubricating grease, the lubrication of the bearings can be guaranteed by increasing the working intensity of the other lubrication branch; at the same time, the separate control of the generator bearings and the variable pitch bearings can make the lubrication system work more flexibly and provide better lubrication for the generator bearings and the variable pitch bearings.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a redundant structure and a control method of a lubrication system for a high-power wind power generator set. Background Art

[0002] In the prior art, the design of the lubrication system of offshore high-power wind turbine generator sets is generally based on one set of bearings corresponding to one set of raceway lubrication systems. The number, size and grease lubrication amount of bearings of offshore high-power units are constantly increasing, and the number and specifications of automatic lubrication systems equipped for bearings are also constantly increasing. The increase in the number of lubrication systems leads to an increase in the overall failure rate of wind turbines and a decrease in the power generation availability. Regardless of onshore unmanned units or offshore wind turbines, the requirements for the unit to operate with a fault without affecting normal power generation, and the requirements for the optional and advance predictable time for fault maintenance are constantly increasing, thereby placing higher requirements on the safety redundancy of components.

[0003] At present, high-power wind turbines are generally equipped with 5 to 8 lubrication systems, each of which corresponds to different bearings and lubrication parts. For example, if there are at least 5 lubrication systems, the failure of any lubrication system will trigger a delayed shutdown. Delayed shutdown will directly reduce the total power generation efficiency of the wind turbine, which is not conducive to the full utilization of the equipment and also leads to the occurrence of many emergencies. The staff have to organize emergency repairs immediately, which puts great pressure on maintenance.

[0004] Based on the technical problems existing in the lubrication system of the above-mentioned wind turbine generator set, there is no relevant solution yet; therefore, it is necessary to improve and optimize to obtain a more reasonable technical solution to solve the deficiencies in the existing technology. Summary of the invention

[0005] In order to overcome the defects of the prior art mentioned above, the present invention provides a redundant structure and control method of the lubrication system for a large-power wind turbine generator set, aiming to combine and match multiple lubrication systems to cooperate with each other during operation. When one of the lubrication systems fails and stops working, the remaining lubrication systems can continue to work and ensure the lubrication effect, so that the wind turbine generator set can continue to work and generate electricity until the maintenance personnel arrange maintenance.

[0006] In order to achieve the above object, the technical solution specifically adopted by the present invention is:

[0007] The redundant structure of the lubrication system for large-power wind turbine generator sets includes at least two lubrication systems for the generator set bearings, both of which are provided with lubrication branches and lubricate the generator bearings, and each lubrication branch corresponds to half of the lubrication points of the lubricating bearings; and at least two lubrication systems for variable pitch bearings, both of which are provided with lubrication branches and lubricate the variable pitch bearings, and each lubrication branch corresponds to half of the lubrication points of the variable pitch bearings.

[0008] The redundant structure disclosed above uses multiple lubrication systems for lubrication work. Each lubrication system is responsible for half of the lubrication points of the bearings it lubricates, and the other lubrication points are provided by another lubrication system. The advantage of this arrangement is that each lubrication system can provide grease lubrication to the bearings at the designated lubrication points, regardless of whether the lubrication points are spread over the entire rotating surface of the bearing. When the bearing rotates, the lubricating grease can enter the parts of the bearing that need lubrication. When a lubrication system fails and stops working, another lubrication system can provide sufficient lubricating grease to the bearing by increasing the amount of grease injected, which will not affect the normal operation of the bearing. In this way, the wind turbine can continue to work for a period of time when part of the lubrication system fails, until the maintenance personnel arrive and perform repairs, avoiding the phenomenon that the wind turbine stops immediately due to a lubrication system failure.

[0009] Furthermore, the generator set can adopt a single bearing or a double bearing. Here, the lubrication system of the generator set with a double bearing is optimized as follows: the generator set is provided with a drive-end bearing and a non-drive-end bearing, and the corresponding lubrication system is provided with two lubrication branches, and each lubrication branch is connected to half of the lubrication points of the drive-end bearing or half of the lubrication points of the non-drive-end bearing.

[0010] Furthermore, when the generator set is provided with a single bearing, the number of lubrication systems is two, and each lubrication system is provided with a lubrication branch to provide lubrication for the bearing, and each lubrication branch provides lubricating grease to half of the lubrication points of the corresponding bearing.

[0011] Furthermore, when the lubrication branch provides lubricating grease to the bearing, the oil supply position of the lubrication branch is not uniquely determined, and the following specific feasible scheme can be adopted: the two lubrication branches acting on the drive end bearing, the non-drive end bearing or the pitch bearing include a plurality of oil outlet pipes, and the oil outlet pipes of the two lubrication branches are arranged crosswise and at intervals or arranged in sequence.

[0012] Furthermore, as a feasible solution, the lubrication system at the pitch bearing can be set up as follows: the number of lubrication systems for the pitch bearing is two, and the number of pitch bearings is three. Both lubrication systems are equipped with three lubrication branches and lubricate the pitch bearings. Each lubrication branch corresponds to half of the lubrication points of the pitch bearing.

[0013] Furthermore, as another feasible solution, the lubrication system at the pitch bearing can be set up as follows: the number of lubrication systems for the pitch bearing is three, and the number of pitch bearings is three. The three lubrication systems are all equipped with two lubrication branches and lubricate the pitch bearings, and each lubrication branch corresponds to lubricating half of the lubrication points of the pitch bearing.

[0014] Furthermore, the lubrication system provides lubricating grease for the corresponding bearings, and its structure is not uniquely determined. In order to ensure redundant safety, the composition structure of the lubrication system is optimized here, and the following specific feasible schemes are given: the lubrication system includes a progressive lubrication pump, which divides the pipeline into two branches through a main distributor, and a secondary distributor is arranged on each branch to divide the branch into several oil supply pipelines, and the oil supply pipelines are connected to the pipe joints arranged at the bearings and supply the lubricating grease to the lubrication points; a junction box for controlling lubrication is arranged on the progressive lubrication pump, and a proximity sensor is arranged at the main distributor. When this scheme is adopted, the lubricating grease is diverted and transported to the lubrication points through the main distributor and the secondary distributor, and the junction box is connected to the controller to control the start and stop of the progressive lubrication pump, and the proximity sensor is used to detect the main distributor in real time.

[0015] Furthermore, the composition of the lubrication system is optimized here, and another specific feasible solution is given: the lubrication system includes a single-line lubrication pump, the single-line lubrication pump is connected to the main line, an oiler is arranged on the main line, the oiler is connected to a number of oil supply pipelines, the oil supply pipelines are connected to the pipe structure arranged at the bearing and supply the lubricating grease to the lubrication point; a pressure switch and a pressure relief valve are arranged on the main line, and a junction box for controlling lubrication is arranged on the single-line lubrication pump. When this solution is adopted, the lubricating grease is directly delivered to the main line through the single-line lubrication pump, and the flow is diverted and oiled through the oiler. The junction box is used to connect the controller and control the start and stop of the single-line lubrication pump. The pressure switch monitors the pipe pressure on the main line in real time. When the pipe pressure of the main line exceeds the preset value, the lubricating grease in the main line is released from the pressure relief valve and the pressure is relieved.

[0016] The above content is the redundant structure disclosed by the present invention. The present invention also discloses a control method for controlling the lubrication system using the redundant structure, which is described here as follows:

[0017] The lubrication system control method for a large-power wind turbine generator set uses the redundant structure disclosed above to control the start and stop of the lubrication systems for the generator set bearings and the variable pitch bearings, wherein the control logic for the generator set is as follows:

[0018] The two lubrication systems A1 and A2 applied to the generator set bearings are started and stopped synchronously or at intervals. The working cycle after starting is X1 hours, and the number of working strokes in a single time cycle is Y1 times;

[0019] If a lubrication system in A1 or A2 is detected to be faulty and the fault state exceeds the maximum limit, the power supply to the faulty system is stopped and the working cycle of the other normal system is adjusted to X1 / 2 hours. The number of working strokes in a single time period remains unchanged.

[0020] Furthermore, the above disclosed method can provide normal lubrication and oil supply to the generator set bearings after a part of the lubrication system fails by reasonably controlling the start and stop of the lubrication system. Correspondingly, similar control can also be adopted for the variable pitch bearings. Specifically, a feasible solution is given here: two sets of lubrication systems B1 and B2, or three sets of lubrication systems B1, B2 and B3 applied to the variable pitch bearings, are started and stopped synchronously or at intervals; the working cycle period after starting is X2 hours, and the number of working strokes in a single time period is Y2 times;

[0021] If a fault is detected in any of the lubrication systems B1, B2 or B3 and the fault state exceeds the maximum limit, the power supply to the lubrication system will be stopped; if the faulty lubrication system is not reset after N unit times, the working time cycle of the remaining two normally working systems will be adjusted to X2 / 2 hours, and the number of working strokes in a single time cycle will remain unchanged.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The redundant structure disclosed in the present invention provides lubricating grease together by arranging at least two lubrication branches at the bearing. Even if one of the lubrication branches fails and stops providing lubricating grease, the lubrication of the bearing can be ensured by increasing the working intensity of the other lubrication branch. At the same time, the separate control of the generator bearing and the pitch bearing can make the lubrication system work more flexibly and provide better lubrication for the generator bearing and the pitch bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only represent some embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 The figure is a schematic diagram of the structure of a lubrication system with a progressive lubrication pump.

[0026] Figure 2This is a schematic diagram of the composition structure of a lubrication system with a single-line lubrication pump.

[0027] Figure 3 A schematic diagram of the structure of a lubrication system with dual bearings and a progressive lubrication pump for a generator set.

[0028] Figure 4 A schematic diagram of the structure of a lubrication system with dual bearings for a generator set and a single-line lubrication pump.

[0029] Figure 5 A schematic diagram of the structure of a lubrication system in which a single bearing is provided for a generator set and a progressive lubrication pump is used.

[0030] Figure 6 A schematic diagram of the structure of a lubrication system in which a single bearing is provided for a generator set and a single-line lubrication pump is used.

[0031] Figure 7 The present invention is a structural schematic diagram of a lubrication system in which two sets of lubrication systems are provided at a variable pitch bearing and a progressive lubrication pump is provided.

[0032] Figure 8 The diagram is a structural diagram of a lubrication system in which two lubrication systems are provided at a pitch bearing and a single-line lubrication pump is provided.

[0033] Fig. 9 The diagram is a structural diagram of a lubrication system in which three lubrication systems are provided at a variable pitch bearing and a progressive lubrication pump is provided.

[0034] Fig.10 The diagram is a structural diagram of a lubrication system in which three lubrication systems are provided at a pitch bearing and a single-line lubrication pump is provided.

[0035] In the above drawings, the meaning of each mark is: 1. Progressive lubrication pump; 1.1. Single-line lubrication pump; 2. Pump core; 3. Safety valve; 4. Safety valve return oil assembly; 5. Transition joint; 6. Main distributor; 7. Secondary distributor; 8. Proximity sensor; 9. Right-angle ferrule connector; 10. Transition structure; 12. Hose; 13. Junction box; 14. Pressure relief valve; 15. Pressure switch; 16. High-pressure hose; 17. Oil outlet pipe; 18. Oil injector. DETAILED DESCRIPTION

[0036] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0037] It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0038] Example 1

[0039] This embodiment aims to improve the working efficiency of wind turbines by adjusting and optimizing the layout and working mode of the lubrication system in order to address the problem that the lubrication system of existing wind turbines is prone to failure during operation, and that failure in any lubrication system will immediately affect the normal operation of the entire turbine, thereby reducing the overall working efficiency of the turbine.

[0040] like Figures 1 to 10 As shown, the redundant structure of the lubrication system for a large-power wind turbine generator set includes at least two lubrication systems for the generator set bearings, both of which are provided with lubrication branches and lubricate the generator bearings, and each lubrication branch corresponds to half of the lubrication points of the lubricating bearings; and at least two lubrication systems for the variable pitch bearings, both of which are provided with lubrication branches and lubricate the variable pitch bearings, and each lubrication branch corresponds to half of the lubrication points of the variable pitch bearings.

[0041] The redundant structure disclosed above uses multiple lubrication systems for lubrication work. Each lubrication system is responsible for half of the lubrication points of the bearings it lubricates, and the other lubrication points are provided by another lubrication system. The advantage of this arrangement is that each lubrication system can provide grease lubrication to the bearings at the designated lubrication points, regardless of whether the lubrication points are spread over the entire rotating surface of the bearing. When the bearing rotates, the lubricating grease can enter the parts of the bearing that need lubrication. When a lubrication system fails and stops working, another lubrication system can provide sufficient lubricating grease to the bearing by increasing the amount of grease injected, which will not affect the normal operation of the bearing. In this way, the wind turbine can continue to work for a period of time when part of the lubrication system fails, until the maintenance personnel arrive and perform repairs, avoiding the phenomenon that the wind turbine stops immediately due to a lubrication system failure.

[0042] The generator set can adopt a single bearing or a double bearing. This embodiment optimizes the lubrication system of the generator set with a double bearing, as follows: The generator set is provided with a drive-end bearing and a non-drive-end bearing, and the corresponding lubrication system is provided with two lubrication branches, and each lubrication branch is connected to half of the lubrication points of the drive-end bearing or half of the lubrication points of the non-drive-end bearing.

[0043] Another feasible solution is provided in this embodiment. When a single bearing is provided in the generator set, the number of lubrication systems is two, and each lubrication system is provided with a lubrication branch to provide lubrication for the bearing. Each lubrication branch provides lubricating grease to half of the lubrication points of the corresponding bearing.

[0044] When the lubrication branch provides lubricating grease to the bearing, the oil supply position of the lubrication branch is not uniquely determined, and the following specific feasible scheme can be adopted: the two lubrication branches acting on the drive end bearing, the non-drive end bearing or the pitch bearing include a plurality of oil outlet pipes 17, and the oil outlet pipes 17 of the two lubrication branches are arranged crosswise and at intervals or arranged in sequence.

[0045] As a feasible solution, the lubrication system at the pitch bearing can be set up as follows: the number of lubrication systems for the pitch bearing is two, and the number of pitch bearings is three. Both lubrication systems are equipped with three lubrication branches and lubricate the pitch bearings. Each lubrication branch corresponds to half of the lubrication points of the pitch bearing.

[0046] As another feasible solution, the lubrication system at the pitch bearing can be set up as follows: the number of lubrication systems for the pitch bearing is three, and the number of pitch bearings is three. The three lubrication systems are all equipped with two lubrication branches and lubricate the pitch bearings. Each lubrication branch corresponds to half of the lubrication points of the pitch bearing.

[0047] The lubrication system provides lubricating grease for the corresponding bearings, and its structure is not uniquely determined. In order to ensure the safety of redundancy, this embodiment optimizes the composition structure of the lubrication system and cites the following specific feasible schemes: the lubrication system includes a progressive lubrication pump 1, which divides the pipeline into two branches through the main distributor 6, and a secondary distributor 7 is arranged on each branch to divide the branch into a number of oil supply pipelines, which are connected to the pipe joints arranged at the bearings and supply the lubricating grease to the lubrication points; a junction box 13 for controlling lubrication is arranged on the progressive lubrication pump 1, and a proximity sensor 8 is arranged at the main distributor 6. When this scheme is adopted, the lubricating grease is diverted and transported to the lubrication points through the main distributor 6 and the secondary distributor 7, and the junction box 13 is connected to the controller to control the start and stop of the progressive lubrication pump 1, and the proximity sensor 8 is used to detect the main distributor 6 in real time.

[0048] Preferably, the controller adopts PLC, the proximity sensor 8 adopts a plunger sensor, and operates with 24V direct current.

[0049] Preferably, the pump core 2 of the progressive lubrication pump 1 is connected to the safety valve 3 through a transition joint 5, and a safety valve return oil assembly 4 is provided on the safety valve 3; the safety valve 3 is connected to the main distributor 6 through a high-pressure hose 16, the main distributor 6 is split and connected to the secondary distributor 7 through two-way hoses 12, and a plurality of oil outlet pipes 17 are provided on the secondary distributor 7 and connected to the lubrication points on the bearing through right-angle ferrule joints 9 and transition structures 10.

[0050] In addition, this embodiment also optimizes the composition of the lubrication system and adopts another specific feasible solution: the lubrication system includes a single-line lubrication pump 1.1, the single-line lubrication pump 1.1 is connected to the main line, an oiler 18 is arranged on the main line, the oiler 18 is connected to a plurality of oil supply pipelines, the oil supply pipelines are connected to the pipe structure arranged at the bearing and supply lubricating grease to the lubrication points; a pressure switch 15 and a pressure relief valve 14 are arranged on the main line, and a junction box 13 for controlling lubrication is arranged on the single-line lubrication pump 1.1. When this solution is adopted, the lubricating grease is directly delivered to the main pipeline through the single-line lubrication pump 1.1, and is diverted and injected through the oiler 18. The junction box 13 is used to connect the controller and control the start and stop of the single-line lubrication pump 1.1. The pressure switch 15 monitors the pipe pressure on the main pipeline in real time. When the pipe pressure in the main pipeline reaches a preset value, the junction box 13 controls the single-line lubrication pump to stop delivering lubricating grease, and reduces the pressure values ​​in the oiler and the main pipeline to normal pressure; when the pipe pressure of the main pipeline exceeds the preset value, the lubricating grease in the main pipeline is released from the pressure relief valve 14 and the pressure is relieved.

[0051] Preferably, the pump core 2 of the single-line lubrication pump 1.1 is connected to a high-pressure hose 16 through a pressure relief valve 14, and a pressure switch 15 is provided on the pressure relief valve 14; the high-pressure hose 16 is connected to an oiler 18, and the oiler 18 is connected to a plurality of oil outlet pipes 17 in a branch manner, and the oil outlet pipes 17 are connected to the lubrication points of the bearings through straight-through ferrule joints.

[0052] In some embodiments, the generator set bearing adopts a single bearing, and the lubrication system can adopt a progressive lubrication pump 1 assembly or a single-line lubrication pump 1.1 assembly.

[0053] In some embodiments, the generator set bearings use double bearings, and the lubrication system can use a progressive lubrication pump 1 assembly or a single-line lubrication pump 1.1 assembly.

[0054] In some embodiments, two sets of lubrication systems are provided at the pitch bearing, and the lubrication system may adopt a progressive lubrication pump 1 assembly or a single-line lubrication pump 1.1 assembly.

[0055] In some embodiments, three sets of lubrication systems are provided at the pitch bearing, and the lubrication system may adopt a progressive lubrication pump 1 assembly or a single-line lubrication pump 1.1 assembly.

[0056] Example 2

[0057] The above content is the redundant structure disclosed by the present invention. The present invention also discloses a control method for controlling the lubrication system using the redundant structure, which is described here as follows:

[0058] The lubrication system control method for a large-power wind turbine generator set uses the redundant structure disclosed above to control the start and stop of the lubrication systems for the generator set bearings and the variable pitch bearings, wherein the control logic for the generator set is as follows:

[0059] The two lubrication systems A1 and A2 applied to the generator set bearings are started and stopped synchronously or at intervals. The working cycle after starting is X1 hours, and the number of working strokes in a single time cycle is Y1 times;

[0060] If a lubrication system in A1 or A2 is detected to be faulty and the fault state exceeds the maximum limit, the power supply to the faulty system is stopped and the working cycle of the other normal system is adjusted to X1 / 2 hours. The number of working strokes in a single time period remains unchanged.

[0061] The above disclosed method can provide normal lubrication and oil supply to the generator set bearings even after a part of the lubrication system fails by reasonably controlling the start and stop of the lubrication system. Correspondingly, similar control can also be adopted for the variable pitch bearings. Specifically, a feasible solution is given here: two sets of lubrication systems B1 and B2, or three sets of lubrication systems B1, B2 and B3 applied to the variable pitch bearings, are started and stopped synchronously or at intervals; the working cycle period after starting is X2 hours, and the number of working strokes in a single time period is Y2 times;

[0062] If a fault is detected in any of the lubrication systems B1, B2 or B3 and the fault state exceeds the maximum limit, the power supply to the lubrication system will be stopped; if the faulty lubrication system is not reset after N unit times, the working time cycle of the remaining two normally working systems will be adjusted to X2 / 2 hours, and the number of working strokes in a single time cycle will remain unchanged.

[0063] In this embodiment, considering that the lubrication requirements of the pitch tooth surface, yaw tooth surface, and yaw raceway are relatively small, their lubrication systems are arranged in a conventional manner.

[0064] The above are the embodiments of the present invention, but the present invention is not limited to the above optional embodiments. Those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments. Anyone can obtain other various forms of embodiments under the enlightenment of the present invention. The above specific embodiments should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A lubrication system control method for a large-power wind turbine generator set is provided, and a lubrication system redundant structure for a large-power wind turbine generator set is applied, including: At least two lubrication systems for generator set bearings, both of which are provided with lubrication branches and lubricate the generator bearings, and each lubrication branch corresponds to half of the lubrication points of the lubricating bearings; and at least two lubrication systems for variable pitch bearings, both of which are provided with lubrication branches and lubricate the variable pitch bearings, and each lubrication branch corresponds to half of the lubrication points of the variable pitch bearings; The generator set is provided with a drive-end bearing and a non-drive-end bearing, and the corresponding lubrication system is provided with two lubrication branches, and each lubrication branch is connected to half of the lubrication points of the drive-end bearing or half of the lubrication points of the non-drive-end bearing; The two lubrication branches acting on the drive end bearing, the non-drive end bearing or the variable pitch bearing include a plurality of oil outlet pipes (17), and the oil outlet pipes (17) of the two lubrication branches are arranged in an intersecting manner or in sequence; The number of lubrication systems for variable pitch bearings is two, and the number of variable pitch bearings is three. The two lubrication systems are both provided with three lubrication branches to lubricate the variable pitch bearings, and each lubrication branch corresponds to lubricating half of the lubrication points of the variable pitch bearings; or, the number of lubrication systems for variable pitch bearings is three, and the number of variable pitch bearings is three. The three lubrication systems are both provided with two lubrication branches to lubricate the variable pitch bearings, and each lubrication branch corresponds to lubricating half of the lubrication points of the variable pitch bearings; The lubrication system comprises a progressive lubrication pump (1), the progressive lubrication pump (1) divides a pipeline into two branches through a main distributor (6), each branch is provided with a secondary distributor (7) to divide the branch into a plurality of oil supply pipelines, the oil supply pipelines are connected to pipe joints provided at the bearings and supply lubricating grease to lubrication points; a junction box (13) for controlling lubrication is provided on the progressive lubrication pump (1), and a proximity sensor (8) is provided at the main distributor (6); or, the lubrication system comprises a single-line lubrication pump (1.1), the single-line lubrication pump (1.1) is connected to a main pipeline, an oiler (18) is provided on the main pipeline, the oiler (18) is connected to a plurality of oil supply pipelines, the oil supply pipelines are connected to a pipe structure provided at the bearings and supply lubricating grease to lubrication points; a pressure switch (15) and a pressure relief valve (14) are provided on the main pipeline, and a junction box (13) for controlling lubrication is provided on the single-line lubrication pump (1.1); The lubrication system control method is characterized in that the lubrication systems for the generator set bearings and the pitch bearings are controlled to start and stop respectively, wherein the control logic for the generator set is specifically as follows: The two lubrication systems A1 and A2 applied to the generator set bearings are started and stopped synchronously or at intervals. The working cycle after starting is X1 hours, and the number of working strokes in a single time cycle is Y1 times; If a lubrication system in A1 or A2 is detected to be faulty and the fault state exceeds the maximum limit, the power supply to the faulty system is stopped and the working cycle of the other normal system is adjusted to X1 / 2 hours. The number of working strokes in a single time period remains unchanged.

2. The lubrication system control method for a high-power wind turbine generator set according to claim 1, characterized in that: Two lubrication systems B1 and B2, or three lubrication systems B1, B2 and B3, applied to pitch bearings, start and stop synchronously or at intervals; the working cycle after start-up is X2 hours, and the number of working strokes in a single time period is Y2 times; If a fault is detected in any of the lubrication systems B1, B2 or B3 and the fault state exceeds the maximum limit, the power supply to the lubrication system will be stopped; if the faulty lubrication system is not reset after N unit times, the working time cycle of the remaining two normally working systems will be adjusted to X2 / 2 hours, and the number of working strokes in a single time cycle will remain unchanged.

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