Hydraulic station system and wind turbine generator

Abstract

The utility model relates to the technical field of wind power equipment, and discloses a hydraulic station system and a wind turbine generator. The hydraulic pump communicates with the oil tank and is suitable for conveying hydraulic oil to the executing mechanism; the oil supply electromagnetic valve is connected between the hydraulic pump and the actuating mechanism so as to control the on-off of an oil supply path; the pressure relief electromagnetic valve is connected between the executing mechanism and the oil tank so as to control on-off of a pressure relief oil way; the pressure detection unit is connected to an oil way of the hydraulic station system so as to detect the pressure in the oil way; the control unit is electrically connected with the oil supply electromagnetic valve, the pressure relief electromagnetic valve and the pressure detection unit, and the control unit controls opening and closing of the oil supply electromagnetic valve and the pressure relief electromagnetic valve according to the detection result of the pressure detection unit, so that when the system pressure detected by the pressure detection unit is smaller than a preset value, the control unit controls the oil supply electromagnetic valve to be closed; and the pressure relief electromagnetic valve is controlled to be opened. The automation degree is high, and leakage of a large amount of oil can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power equipment, in particular to a hydraulic station system and a wind turbine set. Background Art

[0002] At present, there are a large number of wind turbines in my country, and the power industry is developing rapidly. The hydraulic station of the wind turbine is a key component of the wind turbine, which is mainly responsible for providing stable and reliable hydraulic power for the unit. The hydraulic station transmits power through high-pressure liquid to control various actuators of the unit, such as yaw, pitch change, locking hub and other actions, to ensure the stable operation of the wind turbine in a complex and changeable natural environment.

[0003] However, during the operation, the hydraulic station actuator or the external oil pipe may be damaged, resulting in oil leakage in the hydraulic system. Oil leakage in the hydraulic system will cause a large amount of oil to leak out, polluting the surrounding environment, affecting the ecological environment, increasing maintenance costs, and even bringing safety hazards, which may cause safety accidents such as fire, posing a serious threat to the safe operation of wind turbines. Utility Model Content

[0004] In view of this, the utility model provides a hydraulic station system and a wind turbine generator set to solve the problem of large amount of oil leakage when the hydraulic system leaks oil.

[0005] In the first aspect, the utility model provides a hydraulic station system, comprising: an oil tank suitable for storing hydraulic oil; a hydraulic pump connected to the oil tank and suitable for conveying hydraulic oil to an actuator; an oil supply solenoid valve connected between the hydraulic pump and the actuator to control the on-off of the oil supply oil circuit; a pressure relief solenoid valve connected between the actuator and the oil tank to control the on-off of the pressure relief oil circuit; a pressure detection unit connected to the oil circuit of the hydraulic station system to detect the pressure in the oil circuit; a control unit electrically connected to the oil supply solenoid valve, the pressure relief solenoid valve and the pressure detection unit respectively, the control unit controls the opening and closing of the oil supply solenoid valve and the pressure relief solenoid valve according to the detection result of the pressure detection unit, so that when the system pressure detected by the pressure detection unit is less than a preset value, the control unit controls the oil supply solenoid valve to close, and controls the pressure relief solenoid valve to open.

[0006] Beneficial effect: An oil supply solenoid valve is set between the hydraulic pump and the actuator to control the on-off of the oil supply oil circuit, a pressure relief solenoid valve is set between the actuator and the oil tank to control the on-off of the pressure relief oil circuit, and a pressure detection unit is set to detect the pressure in the oil circuit. When the pressure value detected by the pressure detection unit is less than the preset value, the control unit sends a control signal to control the oil supply solenoid valve to close, cutting off the transmission of oil from the hydraulic station to the actuator. At the same time, the control unit sends a control signal to control the pressure relief solenoid valve to open, and the oil in the actuator and the oil pipeline quickly returns to the oil tank, and the control unit controls the action of the oil supply solenoid valve and the pressure relief solenoid valve according to the detection result of the pressure detection unit. No manual operation is required, the degree of automation is high, the response speed is fast, the oil can be quickly refluxed, a large amount of oil leakage can be avoided, environmental pollution can be reduced, and safety accidents such as fire that may be caused by a large amount of oil leakage can be reduced, and maintenance costs can be reduced.

[0007] In an optional implementation, the hydraulic station system includes a yaw branch, the pressure relief solenoid valve includes a first pressure relief solenoid valve, and the first pressure relief solenoid valve is connected to the oil return pipeline of the yaw branch.

[0008] Beneficial effect: By arranging a first pressure relief solenoid valve on the return oil pipeline of the yaw branch, when the first pressure relief solenoid valve is opened, the oil in the yaw brake device and the pipeline is discharged into the oil tank. That is, when the actuator corresponding to the yaw branch and the related oil circuit leak oil, the actuator corresponding to the yaw branch and the oil circuit connected thereto are returned to the oil tank, effectively avoiding the occurrence of large-scale oil leakage.

[0009] In an optional implementation, the hydraulic station system further includes a rotor disc brake branch, and the pressure relief solenoid valve further includes a second pressure relief solenoid valve, and the second pressure relief solenoid valve is connected to the oil return pipeline of the rotor disc brake branch.

[0010] Beneficial effect: By arranging a second pressure relief solenoid valve on the oil return pipeline of the rotor disc brake branch, when the second pressure relief solenoid valve is opened, the oil in the rotor brake device, the rotor locking device and the pipeline is leaked into the oil tank, ensuring that when the actuator and related pipelines connected to the rotor disc brake branch leak oil, the oil can quickly flow back to the oil tank, thereby further avoiding the occurrence of large-scale oil leakage.

[0011] In an optional implementation, the oil supply solenoid valve is connected to the oil supply pipeline of the yaw branch.

[0012] Beneficial effect: By setting an oil supply solenoid valve on the yaw branch to control the on-off of the oil supply to the yaw brake device, the on-off control of the oil supply of the entire system can be achieved, with a simple structure, simple control procedure and low cost.

[0013] In an optional embodiment, the pressure detection unit includes: a first pressure detection unit, which is connected to the oil supply line between the hydraulic pump and the oil supply solenoid valve to detect the pressure on the oil supply line.

[0014] Beneficial effect: By setting a first pressure detection unit between the hydraulic pump and the oil supply solenoid valve to detect the pressure in the oil supply line, the system pressure of the entire hydraulic system can be detected. When the first pressure detection unit detects that the system pressure is lower than the preset value, the control unit controls the oil supply solenoid valve to close, thereby achieving a timely response to the system pressure and protecting the system safety.

[0015] In an optional embodiment, the pressure detection unit further includes: a second pressure detection unit, wherein the second pressure detection unit is connected to the oil circuit between the oil supply solenoid valve and the actuator to detect the working pressure of the actuator.

[0016] Beneficial effect: By setting a second pressure detection unit between the oil supply solenoid valve and the actuator structure to detect the working pressure of the actuator, when the actuator leaks oil, the pressure in the pipeline connected to the actuator decreases, which can be quickly detected by the second pressure detection unit, so that the oil leakage is discovered in time, further improving the response speed and further reducing oil leakage.

[0017] In an optional implementation, the pressure detection unit is a pressure sensor.

[0018] Beneficial effects: The pressure sensor has high sensitivity, mature technology, high reliability, and is relatively common and easy to obtain.

[0019] In an optional implementation, the control unit is connected to the oil supply solenoid valve via a first relay, and the first relay is a normally open relay.

[0020] Beneficial effect: By setting a normally open first relay between the control unit and the oil supply solenoid valve, the control unit controls the oil supply solenoid valve by controlling the closing of the first relay, making the switching of the oil supply solenoid valve more sensitive and increasing the stability and reliability of the operation of the oil supply solenoid valve.

[0021] In an optional implementation, the control unit is connected to the pressure relief solenoid valve via a second relay, and the second relay is a normally closed relay.

[0022] Beneficial effect: By setting a normally closed second relay between the control unit and the pressure relief solenoid valve, the control unit controls the pressure relief solenoid valve by controlling the second relay to open, making the switching of the pressure relief solenoid valve more sensitive and increasing the stability and reliability of the pressure relief solenoid valve.

[0023] In a second aspect, the utility model further provides a wind turbine generator set, comprising: the above-mentioned hydraulic station system. Because the wind turbine generator set comprises the hydraulic station system, it has the same effect as the hydraulic station system, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a structural schematic diagram of a hydraulic station system according to an embodiment of the utility model;

[0026] Figure 2 The electrical circuit diagram of the pressure detection unit of the embodiment of the utility model;

[0027] Figure 3 The electrical circuit diagram of the solenoid valve of the embodiment of the utility model;

[0028] Figure 4 A logic diagram for adding a solenoid valve to an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. Oil tank; 2. Hydraulic pump; 3. Oil supply solenoid valve; 4. First pressure relief solenoid valve; 5. Second pressure relief solenoid valve; 6. First pressure detection unit; 7. Second pressure detection unit; 801. First relay; 802. Second relay; 803. Third relay; 901. Yaw braking device; 902. Rotor braking device; 903. Rotor locking device; 10. Hydraulic station; 110. Yaw branch; 111. Yaw braking system; 120. Rotor disc braking branch; 121. Rotor disc braking system; 122. Locking pin system; 11. First port; 12. Second port; 13. Solenoid valve closing feedback module; 14. Solenoid valve enabling module. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0033] According to an embodiment of the present utility model, on the one hand, a hydraulic station system is provided, such as Figure 1 As shown, the hydraulic station system includes: an oil tank 1, a hydraulic pump 2, an oil supply solenoid valve 3, a pressure relief solenoid valve, a pressure detection unit and a control unit. The oil tank 1 is suitable for storing hydraulic oil; the hydraulic pump 2 is connected to the oil tank 1 and is suitable for delivering hydraulic oil to the actuator; the oil supply solenoid valve 3 is connected between the hydraulic pump 2 and the actuator to control the on-off of the oil supply oil circuit; the pressure relief solenoid valve is connected between the actuator and the oil tank 1 to control the on-off of the pressure relief oil circuit; the pressure detection unit is connected to the oil circuit of the hydraulic station system to detect the pressure in the oil circuit; the control unit is electrically connected to the oil supply solenoid valve 3, the pressure relief solenoid valve and the pressure detection unit respectively, and the control unit controls the opening and closing of the oil supply solenoid valve 3 and the pressure relief solenoid valve according to the detection result of the pressure detection unit, so that when the system pressure detected by the pressure detection unit is less than the preset value, the control unit controls the oil supply solenoid valve 3 to close and controls the pressure relief solenoid valve to open.

[0034] The hydraulic station system of the present embodiment is applied, and an oil supply solenoid valve 3 is set between the hydraulic pump 2 and the actuator to control the on-off of the oil supply oil circuit, and a pressure relief solenoid valve is set between the actuator and the oil tank 1 to control the on-off of the pressure relief oil circuit, and a pressure detection unit is set to detect the pressure on the oil circuit. When the pressure value detected by the pressure detection unit is less than the preset value, the control unit sends a control signal to control the oil supply solenoid valve 3 to close, and cut off the transmission of oil from the hydraulic station to the actuator. At the same time, the control unit sends a control signal to control the pressure relief solenoid valve to open, and the oil in the actuator and the oil pipeline quickly returns to the oil tank 1, and the control unit controls the action of the oil supply solenoid valve 3 and the pressure relief solenoid valve according to the detection result of the pressure detection unit. No manual operation is required, the degree of automation is high, the response speed is fast, and the rapid reflux of oil can be realized, thereby avoiding large-scale leakage of oil, reducing environmental pollution, reducing safety accidents such as fire caused by large-scale leakage of oil, and reducing maintenance costs.

[0035] It should be noted that the preset value is a pre-set parameter value. When the hydraulic station system is working normally, the pressure in the oil circuit is greater than or equal to the preset value. If the pressure value in the oil circuit is less than the preset value, it means that the actuator or the external oil pipe is leaking oil. At this time, the oil in the actuator and the external oil pipe should be quickly drained into the oil tank 1 to avoid oil leakage. The traditional oil supply method is to control the on-and-off of the oil circuit by installing a mechanical stop valve on the oil supply pipeline. Once the actuator or the external oil pipe leaks oil, it is necessary to manually operate the mechanical stop valve to disconnect the oil supply, which is inconvenient to operate and cannot respond in time, and will still cause a large amount of oil leakage; the hydraulic station system of this embodiment uses an electromagnetic valve to replace the mechanical stop valve, and adds a pressure detection module to detect the pressure in the oil circuit. The control unit is used to convert the command signal that the pressure value in the hydraulic station oil circuit is lower than the preset value into a control signal and send it to the electromagnetic valve. The control signal controls the oil supply electromagnetic valve 3 to close and the pressure relief electromagnetic valve to open. When the actuator or the external oil pipe leaks oil, the oil supply electromagnetic valve 3 automatically cuts off the oil, and the actuator oil quickly flows back to the oil tank through the pressure relief electromagnetic valve at the same time, which changes the original oil supply method, adopts the command control solenoid valve opening and closing action to supply and drain oil, and performs real-time control according to the actual pressure in the oil circuit, with a high degree of automation and a fast response speed.

[0036] It is understandable that when the actuator or the external oil pipe is inspected and repaired, the oil supply solenoid valve 3 can be remotely controlled to cut off the hydraulic station 10 from transmitting oil to the outside, so as to facilitate maintenance and repair by the maintenance personnel.

[0037] The actuator is a part that performs actions. The hydraulic station system of this embodiment can be applied to wind turbines. Correspondingly, the actuator includes a yaw brake device 901 , a rotor brake device 902 and a rotor locking device 903 .

[0038] In one embodiment, the hydraulic station system includes a yaw branch 110, and the pressure relief solenoid valve includes a first pressure relief solenoid valve 4, and the first pressure relief solenoid valve 4 is connected to the oil return pipeline of the yaw branch 110. It should be noted that the yaw branch 110 includes a circuit of a yaw brake system 111, which is used to supply oil to the yaw brake device 901 and return oil. The yaw brake device 901 cooperates with the control system to keep the wind turbine rotor in a windward state, fully utilize wind energy, and improve the power generation efficiency of the unit. By arranging the first pressure relief solenoid valve 4 on the oil return pipeline of the yaw branch 110, when the first pressure relief solenoid valve 4 is opened, the yaw brake device 901 and the oil in the pipeline are discharged into the oil tank 1, that is, when the actuator corresponding to the yaw branch 110 and the related oil circuit leak oil, the actuator corresponding to the yaw branch 110 and the oil in the oil circuit connected thereto are returned to the oil tank 1, effectively avoiding the occurrence of a large amount of oil leakage.

[0039] In one embodiment, the hydraulic station system further includes a rotor disc brake branch 120, and the pressure relief solenoid valve further includes a second pressure relief solenoid valve 5, and the second pressure relief solenoid valve 5 is connected to the oil return pipeline of the rotor disc brake branch 120. It should be noted that the rotor disc brake branch 120 includes a circuit of a rotor disc brake system 121 and a circuit of a locking pin system 122. The circuit of the rotor disc brake system 121 is used to supply oil to the rotor brake device 902 and return oil to achieve rotor disc braking, so that the wind turbine can be quickly and smoothly braked and stopped in the event of a fault or emergency; the circuit of the locking pin system 122 is used to supply oil to the rotor locking device 903 and return oil to achieve impeller pin entry and withdrawal; the locking pin system 122 is connected to the downstream of the rotor disc brake system 121, and the two share an oil return circuit. By arranging a second pressure relief solenoid valve 5 on the oil return pipeline of the rotor disc brake branch 120, when the second pressure relief solenoid valve 5 is opened, the rotor brake device 902, the rotor locking device 903 and the oil in the pipeline are leaked into the oil tank 1, ensuring that when the actuator and related pipelines connected to the rotor disc brake branch 120 leak oil, the oil can quickly flow back to the oil tank 1, thereby further avoiding the occurrence of large-scale oil leakage.

[0040] In one embodiment, the oil supply solenoid valve 3 is connected to the oil supply pipeline of the yaw branch 110. It should be noted that the rotor brake device 902 and the rotor locking device 903 will work only when the yaw brake device 901 works. Therefore, by setting the oil supply solenoid valve 3 on the yaw branch 110 to control the on and off of the oil supply to the yaw brake device 901, the on and off control of the oil supply of the entire system can be achieved, which has a simple structure, a simple control procedure and a low cost.

[0041] In one embodiment, the pressure detection unit includes: a first pressure detection unit 6, which is connected to the oil supply line between the hydraulic pump 2 and the oil supply solenoid valve 3 to detect the pressure on the oil supply line. The first pressure detection unit 6 is used to detect the system pressure of the entire hydraulic station. When oil leakage occurs at any point in the hydraulic station system, the pressure of the entire system decreases, which can be detected by the first pressure detection unit 6. By setting the first pressure detection unit 6 between the hydraulic pump 2 and the oil supply solenoid valve 3, the pressure on the oil supply line is detected, and the system pressure of the entire hydraulic system is detected. When the first pressure detection unit 6 detects that the system pressure is lower than the preset value, the control unit controls the oil supply solenoid valve 3 to close, so as to achieve a timely response to the system pressure and protect the system safety.

[0042] In one embodiment, the pressure detection unit further includes: a second pressure detection unit 7, which is connected to the oil circuit between the oil supply solenoid valve 3 and the actuator to detect the working pressure of the actuator. By setting the second pressure detection unit 7 between the oil supply solenoid valve 3 and the actuator structure to detect the working pressure of the actuator, when the actuator leaks oil, the pressure in the pipeline connected to the actuator decreases, which can be quickly detected by the second pressure detection unit 7, and the oil leakage is discovered in time, which further improves the response speed and further reduces oil leakage. Specifically, the second pressure detection unit 7 is connected to the oil circuit between the oil supply solenoid valve 3 and the yaw brake device 901 to detect the yaw pressure of the yaw brake device 901.

[0043] In one embodiment, the pressure detection unit is a pressure sensor, which has high sensitivity, mature technology, high reliability, and is relatively common and easy to obtain.

[0044] The electrical diagram of the pressure detection unit is as follows: Figure 2 As shown, the hydraulic station system has a first pressure detection unit 6 and a second pressure detection unit 7. The first pressure detection unit 6 is connected to the first port 11 in the control unit to realize system pressure feedback; the second pressure detection unit 7 is connected to the second port 12 in the control unit to realize yaw pressure feedback.

[0045] In one embodiment, the control unit is connected to the oil supply solenoid valve 3 through a first relay 801, and the first relay 801 is a normally open relay. The first relay 801 is a normally open relay. When the pressure value detected by the pressure detection unit is lower than the preset value, the control unit sends a control signal to the first relay 801, the first relay 801 is closed, the oil supply solenoid valve 3 is closed, and the oil supply oil path is cut off. By setting a normally open first relay 801 between the control unit and the oil supply solenoid valve 3, the control unit controls the oil supply solenoid valve 3 by controlling the first relay 801 to close, so that the switch of the oil supply solenoid valve 3 is more sensitive, and the stability and reliability of the operation of the oil supply solenoid valve 3 are increased.

[0046] In one embodiment, the control unit is connected to the pressure relief solenoid valve through a second relay 802, and the second relay 802 is a normally closed relay. The second relay 802 is a normally closed relay. When the pressure value detected by the pressure detection unit is lower than the preset value, the control unit sends a control signal to the second relay 802, the second relay 802 opens, cuts off the circuit, and the pressure relief solenoid valve opens to conduct the return oil circuit. By setting a normally closed second relay 802 between the control unit and the pressure relief solenoid valve, the control unit controls the pressure relief solenoid valve by controlling the second relay 802 to open, so that the switch of the pressure relief solenoid valve is more sensitive, and the stability and reliability of the pressure relief solenoid valve are increased.

[0047] The electrical circuit of the solenoid valve is as follows Figure 3 As shown, a normally open first relay 801 is provided on the branch where the oil supply solenoid valve 3 is located, and a normally closed second relay 802 is provided on the branch where the first pressure relief solenoid valve 4 and the second pressure relief solenoid valve 5 are located respectively. At the same time, the solenoid valve closing feedback module 13 is connected in the circuit through a normally open third relay 803. When the solenoid valve enabling module 14 is working, the first relay 801 and the third relay 803 are closed, and the circuit where the oil supply solenoid valve 3 and the solenoid valve closing feedback module 13 are located is turned on; the second relay 802 is turned on, and the circuit where the pressure relief solenoid valve is located is disconnected.

[0048] In one embodiment, the hydraulic pump 2 is electrically connected to the control unit. When the system pressure detected by the pressure detection unit is less than a preset value, the control unit controls the hydraulic pump 2 to stop delivering hydraulic oil to the oil circuit.

[0049] Preferably, the control unit is a PLC (Programmable Logic Controller), which is used to control the switch of the solenoid valve. The technology is mature and the reliability is high. Figure 4 As shown, in the hydraulic station system of the present embodiment, a solenoid valve control system is added, and the solenoid valve control system includes: a PLC, a relay, a solenoid valve and an electrical circuit from the PLC to the solenoid valve. The PLC is provided with system pressure and yaw pressure by a pressure detection module. The newly added PLC output port is connected with the relay and the solenoid valve, and is used to convert the command signal into a control signal and send it to the solenoid valve; when the command signal indicates that the system pressure or yaw pressure is lower than a preset value, the control signal controls the oil supply solenoid valve 3 to close, and the hydraulic station 10 is cut off from transmitting oil to the outside. At the same time, the control signal controls the pressure relief valve to open, and the oil in the actuator and the pipeline quickly returns to the oil tank 1.

[0050] According to an embodiment of the present invention, on the other hand, a wind turbine is provided, comprising: the hydraulic station system described above. The wind turbine of this embodiment can be an offshore large megawatt and hydraulic variable pitch wind turbine.

[0051] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A hydraulic station system, characterized in that: include: An oil tank (1) suitable for storing hydraulic oil; A hydraulic pump (2) connected to the oil tank (1) and adapted to deliver hydraulic oil to the actuator; An oil supply solenoid valve (3) connected between the hydraulic pump (2) and the actuator to control the on / off of the oil supply circuit; A pressure relief solenoid valve connected between the actuator and the oil tank (1) to control the on / off of the pressure relief oil circuit; A pressure detection unit, connected to the oil circuit of the hydraulic station system to detect the pressure in the oil circuit; A control unit is electrically connected to the oil supply solenoid valve (3), the pressure relief solenoid valve and the pressure detection unit respectively, and the control unit controls the opening and closing of the oil supply solenoid valve (3) and the pressure relief solenoid valve according to the detection result of the pressure detection unit, so that when the system pressure detected by the pressure detection unit is less than a preset value, the control unit controls the oil supply solenoid valve (3) to close and controls the pressure relief solenoid valve to open.

2. The hydraulic station system according to claim 1, characterized in that: The hydraulic station system comprises a yaw branch (110), the pressure relief solenoid valve comprises a first pressure relief solenoid valve (4), and the first pressure relief solenoid valve (4) is connected to the oil return pipeline of the yaw branch (110).

3. The hydraulic station system according to claim 2, characterized in that: The hydraulic station system further comprises a rotor disc brake branch (120), and the pressure relief solenoid valve further comprises a second pressure relief solenoid valve (5), wherein the second pressure relief solenoid valve (5) is connected to the oil return pipeline of the rotor disc brake branch (120).

4. The hydraulic station system according to claim 2, characterized in that: The oil supply solenoid valve (3) is connected to the oil supply pipeline of the yaw branch (110).

5. The hydraulic station system according to claim 1, characterized in that: The pressure detection unit comprises: a first pressure detection unit (6), wherein the first pressure detection unit (6) is connected to the oil supply line between the hydraulic pump (2) and the oil supply solenoid valve (3) to detect the pressure on the oil supply line.

6. The hydraulic station system according to claim 5, characterized in that: The pressure detection unit further comprises: a second pressure detection unit (7), wherein the second pressure detection unit (7) is connected to the oil circuit between the oil supply solenoid valve (3) and the actuator to detect the working pressure of the actuator.

7. The hydraulic station system according to claim 1, characterized in that: The pressure detection unit is a pressure sensor.

8. The hydraulic station system according to any one of claims 1 to 7, characterized in that: The control unit is connected to the oil supply solenoid valve (3) via a first relay (801), and the first relay (801) is a normally open relay.

9. The hydraulic station system according to any one of claims 1 to 7, characterized in that: The control unit is connected to the pressure relief solenoid valve via a second relay (802), and the second relay (802) is a normally closed relay.

10. A wind turbine generator set, characterized in that: include: The hydraulic station system according to any one of claims 1 to 9.

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