Servo control system and method

Abstract

This application provides a relay control system and method, including: when the guide vane relay is in a closed state, a locking unit is used to lock the closed state of the guide vane relay to prevent accidental opening of the guide vane relay, which could lead to potential positional hazards of the blades. An emergency pressure control unit is used to control the on / off state of the emergency pressure control unit, which can promptly close the emergency pressure control valve and improve system stability. The locking unit's first locking unit is connected to a second locking unit and a third locking unit. When the guide vane relay is in a closed state, the guide vane relay locks the second locking unit, thereby locking the guide vane relay in the closed state by the third locking unit. When the guide vane relay is open, the second locking unit is not locked. If the first locking unit malfunctions, it will not affect the control of the guide vane relay, thus avoiding the problem of accidental locking of the guide vane relay in the open state.

Description

Technical Field

[0001] This application relates to the field of relay control technology for hydropower stations, and in particular to a relay control system and method. Background Technology

[0002] Because the operating conditions of pump-turbines in pumped power stations are complex, the servo motor controls the opening and closing of the guide vanes. The unit needs to be activated through the action of the servo motor to switch or adjust various operating conditions such as shutdown, power generation, phase adjustment, and pumping. However, if the locking solenoid valve is mis-set during the control process of the servo motor, it will cause the servo motor to malfunction, resulting in the potential danger of changes in the position of the blades. Summary of the Invention

[0003] In view of this, the purpose of this application is to propose a relay control system and method to solve the problem of relay malfunction causing changes in blade position in the prior art.

[0004] To achieve the above objectives, this application provides a relay control system, comprising: a guide vane relay, a locking unit, an emergency pressure control unit, and an emergency pressure distribution unit connected to each other;

[0005] The locking unit is used to lock the closed state of the guide vane servo when the guide vane servo is in the closed state, and to control the on / off state of the emergency pressure control unit;

[0006] The emergency pressure control unit is used to control the on / off state of the emergency pressure control unit;

[0007] The locking unit includes a first locking unit, a second locking unit, and a third locking unit. The first locking unit is connected to the third locking unit through the second locking unit. When the guide vane relay is in the closed state, the guide vane relay locks the second locking unit so that the third locking unit locks the closed state of the guide vane relay according to the locking state of the second locking unit.

[0008] Optionally, the first locking unit includes a locking solenoid valve, the second locking unit includes a stroke valve, and the third locking unit includes a hydraulic locking device. The first end of the locking solenoid valve and the first end of the stroke valve are both connected to an oil tank. The second end of the locking solenoid valve is connected to the second end of the stroke valve. The third end of the stroke valve is connected to the oil inlet of the hydraulic locking device. When the guide vane servo is in the closed state, the control end of the hydraulic locking device is connected to the switch end of the guide vane servo.

[0009] Optionally, the guide vane relay includes a relay body and a relay piston rod located inside the relay body; the relay piston rod serves as the switch end of the guide vane relay, and when the guide vane relay is in the closed state, the control end of the hydraulic locking device abuts against the relay piston rod.

[0010] Optionally, a limiting block is provided on the piston rod of the servo motor located outside the servo motor body; when the guide vane servo motor is in the closed state, the pulley end of the stroke valve abuts against the limiting block.

[0011] Optionally, the emergency pressure control unit includes a hydraulic control valve, the control end of which is connected to the third end of the stroke valve, and the second end of which is connected to the emergency pressure control unit.

[0012] Optionally, the emergency pressure regulating unit includes an emergency pilot valve and an emergency pressure regulating valve. The first end of the emergency pilot valve is connected to the second end of the hydraulic control valve, the second end of the emergency pilot valve is connected to the control end of the emergency pressure regulating valve, the first end of the emergency pressure regulating valve is connected to the first control end of the guide vane servo, and the second end of the emergency pressure regulating valve is connected to the second control end of the guide vane servo.

[0013] Optionally, a cartridge valve assembly is provided between the emergency pressure regulating valve and the guide vane servo. The cartridge valve assembly includes a first cartridge valve, a second cartridge valve, a third cartridge valve, and a fourth cartridge valve. The first ends of the first and second cartridge valves are both connected to the second end of the emergency pressure regulating valve. The first ends of the third and fourth cartridge valves are both connected to the first end of the emergency pressure regulating valve. The second ends of the first and third cartridge valves are both connected to the second control end of the guide vane servo. The second ends of the second and fourth cartridge valves are both connected to the first control end of the guide vane servo.

[0014] Optionally, it further includes: an overspeed protection unit, the control terminal of which is connected to the speed detector, and the output terminal of which is connected to the input terminal of the emergency pressure control unit.

[0015] Optionally, the overspeed protection unit includes a mechanical overspeed protection device, the control terminal of which is connected to the speed detector, and the output terminal of which is connected to the first terminal of the hydraulic control valve.

[0016] Based on the unified inventive concept, this application also provides a relay control method, applicable to any of the relay control systems described above, comprising:

[0017] In response to the guide vane servo being in the open state and the turbine speed exceeding a preset threshold, the pressure oil, through the first locking unit and the second locking unit, activates the emergency pressure control unit, and the overspeed protection device provides new pressure oil to the emergency pressure control unit through the emergency pressure control unit.

[0018] The emergency pressure distribution unit controls the opening of the guide vane relay according to the new pressure oil;

[0019] In response to the guide vane relay being in the closed state, the second locking unit is locked, and the third locking unit locks the closed state of the guide vane relay according to the locking state of the second locking unit.

[0020] As can be seen from the above description, this application provides a relay control system and method. The system includes: a guide vane relay, a locking unit, an emergency pressure control unit, and an emergency pressure distribution unit connected to each other. The locking unit is used to lock the closed state of the guide vane relay when it is in a closed state, and to control the on / off state of the emergency pressure distribution control unit. The emergency pressure distribution control unit is used to control the on / off state of the emergency pressure distribution unit. The locking unit includes a first locking unit, a second locking unit, and a third locking unit. The first locking unit is connected to the third locking unit through the second locking unit. When the guide vane relay is in a closed state, the guide vane relay locks the second locking unit, so that the third locking unit locks the closed state of the guide vane relay according to the locking state of the second locking unit. When the guide vane relay is in a closed state, the locking unit locks the closed state of the guide vane relay to prevent accidental opening of the guide vane relay, which could lead to potential blade position problems. The emergency pressure distribution control unit controls the on / off state of the emergency pressure distribution unit, enabling timely closure of the emergency pressure distribution valve and improving system stability. The first locking unit of the locking unit is connected to the third locking unit through the second locking unit. When the guide vane servo is in the closed state, the guide vane servo locks the second locking unit, so the third locking unit locks the guide vane servo in the closed state. When the guide vane servo is open, the second locking unit is not locked. If the first locking unit is misoperated, it will not affect the control of the guide vane servo. In this way, the problem of the guide vane servo being accidentally locked when it is open is avoided. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structural framework of a relay control system according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the air circuit structure of a relay control system according to an embodiment of this application;

[0024] Figure 3 This is a schematic flowchart of a relay control method according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of this application.

[0026] In the attached image:

[0027] 1. Locking unit; 2. Emergency pressure control unit; 3. Emergency pressure control unit; 4. Overspeed protection unit; 11. First locking unit; 12. Second locking unit; 13. Third locking unit; A. Locking solenoid valve; B. Stroke valve; C. Limit block; D. Relay piston rod; E. Guide vane relay; F. Hydraulic locking device; G. Hydraulic control valve; H. Mechanical overspeed protection device; I. Emergency pilot valve; J. Emergency pressure control valve; K. Cartridge valve assembly; L. Fine-tuning system; C1. First cartridge valve; C2. Second cartridge valve; C3. Third cartridge valve; C4. Fourth cartridge valve. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1This application provides a relay control system, including: a guide vane relay E, a locking unit 1, an emergency pressure control unit 2, and an emergency pressure control unit 3 connected to each other;

[0032] The locking unit 1 is used to lock the closed state of the guide vane servo when the guide vane servo is in the closed state, and to control the on / off state of the emergency pressure control unit 2.

[0033] The emergency pressure control unit 2 is used to control the on / off state of the emergency pressure control unit 3;

[0034] The locking unit 1 includes a first locking unit 11, a second locking unit 12, and a third locking unit 13. The first locking unit 11 is connected to the third locking unit 13 through the second locking unit 12. When the guide vane relay E is in the closed state, the guide vane relay E locks the second locking unit 12, so that the third locking unit 13 locks the closed state of the guide vane relay E according to the locking state of the second locking unit 12.

[0035] Specifically, the guide vane servoir E is connected to the turbine's guide vane mechanism, such as the guide vane itself, and is used to adjust the opening degree of the guide vane mechanism. The guide vane servoir E has functions for opening, closing, and emergency shutdown of the guide vane, enabling arbitrary opening adjustment and emergency shutdown capabilities. When the guide vane servoir E is in the closed state, the locking unit 1 locks the closed state of the guide vane servoir E to prevent accidental opening and potential blade misalignment. The emergency pressure control unit 2 controls the on / off state of the emergency pressure control unit 3, enabling timely closure of the emergency pressure control valve J and improving system stability. In this unit, the first locking unit 11 of the locking unit 1 is connected to the third locking unit 13 through the second locking unit 12. When the guide vane servoir E is in the closed state, the guide vane servoir E locks the second locking unit 12, thereby locking the guide vane servoir E in the closed state by the third locking unit 13. When the guide vane servoir E is open, the second locking unit 12 is not locked. If the first locking unit 11 is misoperated, it will not affect the control of the guide vane servoir E. In this way, the problem of the guide vane servoir E being accidentally locked in the open state is avoided.

[0036] In some embodiments, such as Figure 1 and Figure 2As shown, the first locking unit 11 includes a locking solenoid valve A, the second locking unit 12 includes a stroke valve B, and the third locking unit 13 includes a hydraulic locking device F. The first end of the locking solenoid valve A and the first end of the stroke valve B are both connected to the oil tank. The second end of the locking solenoid valve A is connected to the second end of the stroke valve B. The third end of the stroke valve B is connected to the oil inlet of the hydraulic locking device. When the guide vane servo is in the closed state, the control end of the hydraulic locking device F is connected to the switch end of the guide vane servo E.

[0037] Specifically, the first end of the locking solenoid valve A is the inlet end of the locking solenoid valve, and the second end is the outlet end. The first end of the stroke valve B is the first inlet end, the second end is the second inlet end, and the third end is the outlet end. The hydraulic locking device can be a hydraulic lock, and the control end of the hydraulic locking device is the locking end of the hydraulic lock. When the guide vane servoir E is in the closed state, the guide vane servoir E locks the second locking unit 12, that is, the stroke valve B is locked, and no oil flows through it. When the stroke valve B is locked and no oil flows through it, there is no oil flow in the hydraulic locking device, so it is in a locked state, locking the switch end of the guide vane servoir E.

[0038] In some embodiments, such as Figure 2 As shown, the guide vane servoir E includes a servoir body and a servoir piston rod D located inside the servoir body; the servoir piston rod D serves as the switch end of the guide vane servoir E, and when the guide vane servoir E is in the closed state, the control end of the hydraulic locking device F abuts against the servoir piston rod D.

[0039] Specifically, such as Figure 2 As shown, the guide vane servo actuator E includes a servo actuator body and a servo actuator piston rod D. The servo actuator body can be a hydraulic cylinder, and the piston-bearing end of the piston rod D is located inside the servo actuator body. Two oil inlets are provided on the side wall of the servo actuator body. One oil inlet is used to control the extension of the piston rod (e.g., controlling the closing of the guide vane servo actuator E), and the other oil inlet is used to control the retraction of the piston rod (e.g., controlling the opening of the guide vane servo actuator E). When the piston rod D is fully extended from the servo actuator body, the servo actuator is in the closed state, thereby controlling the guide vane to close. To prevent accidental opening of the guide vane servo actuator E due to misoperation, a hydraulic locking device is needed to lock the piston rod D of the guide vane servo actuator E. The hydraulic locking end of the hydraulic locking device abuts against the piston rod D to prevent piston rod movement.

[0040] In some embodiments, such as Figure 2As shown, a limiting block C is provided on the piston rod D of the servo motor located outside the servo motor body; when the guide vane servo motor E is in the closed state, the pulley end of the stroke valve B abuts against the limiting block C.

[0041] Specifically, a limiting block C is provided above the piston rod D of the servo actuator, and a pulley is provided at the control end of the stroke valve B. The pulley at the control end of the stroke valve B cooperates with the limiting block C. The limiting block C is used to control the conduction state of the stroke valve B. When the guide vane servo actuator E is closed, the limiting block C is located below the stroke valve B. At this time, the stroke valve B is placed in the parallel position, that is, the closed state. When the stroke valve B is in the closed state, there is no pressure between the stroke valve B and the hydraulic locking device, so that the hydraulic locking device is in the locked state, and abuts and locks the piston rod D of the servo actuator to prevent the guide vane servo actuator E from being opened accidentally.

[0042] In some embodiments, such as Figure 2 As shown, the emergency pressure control unit 2 includes a hydraulic control valve G, the control end of which is connected to the third end of the stroke valve B, and the second end of which is connected to the emergency pressure control unit 3.

[0043] Specifically, when the guide vane servo E is in the open state, the limit block C of the guide vane servo E disengages from the stroke valve B, causing the stroke valve B to be in the cross position. When the stroke valve B is in the cross position, the stroke valve B is open, transmitting pressure oil to the hydraulic control valve G, causing the hydraulic control valve G to be in the cross position and open. The opening of the hydraulic control valve G can configure the appropriate pressure for the emergency pressure distribution unit 3.

[0044] When the guide vane servo E is in the closed state, the limit block C of the guide vane servo E lifts the roller end of the stroke valve B, placing the stroke valve B in the parallel position. Stroke valve B is then cut off, and there is no pressure in the pipeline between the third end of stroke valve B and the hydraulic control valve G. Therefore, the hydraulic control valve G is in the parallel position and cut off, causing the emergency pressure distribution unit 3 to close. Consequently, all oil circuits are blocked and locked, thus ensuring the stability of the system.

[0045] In some embodiments, the emergency pressure regulating unit 3 includes an emergency pilot valve I and an emergency pressure regulating valve J. The first end of the emergency pilot valve I is connected to the second end of the hydraulic control valve G, the second end of the emergency pilot valve I is connected to the control end of the emergency pressure regulating valve J, the first end of the emergency pressure regulating valve J is connected to the first control end of the guide vane servo E, and the second end of the emergency pressure regulating valve J is connected to the second control end of the guide vane servo E.

[0046] Specifically, when the hydraulic control valve G is in the cross position, the overspeed protection device will transmit new pressurized oil to the emergency pilot valve I via the hydraulic control valve G. The emergency pilot valve I will then open, transmitting the new pressurized oil to the emergency pressure regulating valve J. The emergency pressure regulating valve J will distribute the new pressure to the guide vane servo actuator E, thereby controlling the opening and closing of the guide vane servo actuator E. In this way, the control of the guide vane opening by the guide vane servo actuator E can be precisely controlled.

[0047] In some embodiments, such as Figure 2 As shown, a cartridge valve group K is provided between the emergency pressure regulating valve J and the guide vane relay E. The cartridge valve group K includes a first cartridge valve C1, a second cartridge valve C2, a third cartridge valve C3, and a fourth cartridge valve C4. The first end of the first cartridge valve C1 and the first end of the second cartridge valve C2 are both connected to the second end of the emergency pressure regulating valve J. The first end of the third cartridge valve C3 and the first end of the fourth cartridge valve C4 are both connected to the first end of the emergency pressure regulating valve J. The second end of the first cartridge valve C1 and the second end of the third cartridge valve C3 are both connected to the second control end of the guide vane relay E. The second end of the second cartridge valve C2 and the second end of the fourth cartridge valve C4 are both connected to the first control end of the guide vane relay E.

[0048] Specifically, such as Figure 2 As shown, the first cartridge valve C1 and the third cartridge valve C3 are connected to the oil inlet at the retracted end of the piston rod D of the guide vane servo actuator E, and the second cartridge valve C2 and the fourth cartridge valve C4 are connected to the oil inlet at the extended end of the piston rod D of the guide vane servo actuator E. When the emergency pressure distribution valve J transmits new pressure oil to the first cartridge valve C1, the second cartridge valve C2, the third cartridge valve C3, and the fourth cartridge valve C4, the pressure oil is supplied to the guide vane servo actuator E through the control of each cartridge valve, thereby controlling the opening and closing degree of the guide vane servo actuator E.

[0049] Furthermore, such as Figure 2 As shown, the first cartridge valve C1 and the second cartridge valve C2 are also connected to a fine-tuning system L, which can control the opening and closing of the cartridge valves to control the pressure of the pressure oil. One end of the third cartridge valve C3 is connected to the main return oil circuit, and one end of the fourth cartridge valve C4 is connected to the main pressure oil circuit. They can work with the first cartridge valve C1 and the second cartridge valve C2 to control the main pressure oil circuit and the main return oil circuit to supply oil to the guide vane servo E, and quickly control the opening degree of the guide vane servo E.

[0050] In some embodiments, such as Figure 1 and Figure 2 As shown, it also includes: an overspeed protection unit 4, the control terminal of which is connected to the speed detector, and the output terminal of which is connected to the input terminal of the emergency pressure control unit 2.

[0051] Furthermore, the overspeed protection unit 4 includes a mechanical overspeed protection device H, the control terminal of which is connected to the speed detector, and the output terminal of which is connected to the first terminal of the hydraulic control valve G.

[0052] Specifically, the mechanical overspeed protection device can be a flow control valve. When the speed detector detects that the turbine speed is too high, the mechanical overspeed protection device will transmit the oil in the oil tank to the hydraulic control valve G according to a certain pressure. The hydraulic control valve G will transmit the pressure oil to the emergency pressure distribution unit 3 to provide pressure oil for the guide vane servo E, so as to control the opening of the guide vane servo E.

[0053] It should be noted that the embodiments of this application can also be further described in the following ways:

[0054] When the turbine is stopped, the locking solenoid valve A is engaged and in the cross position. The pulley of the stroke valve B is pressed against the plane of the limit block C, and the stroke valve B is in the parallel position. The pressure oil is cut off. The emergency control pilot valve I is engaged and in the parallel position. The emergency control valve J is closed and in the parallel position. The pressure oil reaches C1 and C2 of the cartridge valve K through the emergency control valve J. The fine-tuning system L cannot control the guide vane servo device E.

[0055] When the guide vane needs to be opened, the locking solenoid valve A is disengaged, and the emergency pilot valve I is disengaged.

[0056] Locking solenoid valve A is disengaged and switched to the parallel position. Pressure oil enters stroke valve B through locking solenoid valve A. After passing through stroke valve B, the pressure oil is divided into two paths. One path enters hydraulic locking device F and exits hydraulic locking device F so that guide vane servo can be opened or closed. The other path goes to hydraulic control valve G and puts hydraulic control valve G in the cross position.

[0057] One path of pressurized oil reaches the hydraulic control valve G through the mechanical overspeed protection device H. Since the hydraulic control valve G is in the cross position, the pressurized oil passes through the hydraulic control valve G to the emergency control pilot valve I. When the emergency control pilot valve I is disengaged and in the cross position, the pressurized oil reaches the emergency control valve J, causing the emergency control valve J to be in the cross position, i.e., open. At this time, the guide vane servo can be opened or closed.

[0058] As the guide vane servo E opens, the servo piston rod D moves to the left, and the limit block C moves to the left accordingly. The pulley of the stroke valve B gradually presses against the inclined surface of the limit block C, and the stroke valve B releases its stroke. The stroke valve B is placed in the cross position, and the pressure oil passes directly through the stroke valve B without passing through the locking solenoid valve A. At this time, the locking solenoid valve A is cut off from the oil circuit and loses its function, thus avoiding the operational risk of accidentally activating the locking solenoid valve A in non-stop conditions.

[0059] Meanwhile, because the pipeline between the stroke valve B and the hydraulic control valve G is pressurized, the hydraulic control valve G can be placed in the cross position. If the pipeline leaks and loses pressure, the hydraulic control valve G will be placed in the parallel position. The pressure oil through the mechanical overspeed device J will be cut off by the hydraulic control valve G. When the pipeline between the hydraulic control valve G and the emergency control pilot valve I loses pressure, the emergency control valve J will be placed in the parallel position, i.e., closed, thereby shutting down the relay and effectively preventing the accident from escalating.

[0060] When the guide vane servo E is closed, the servo piston rod D moves to the right, and the limit block C moves to the right accordingly. The pulley of the stroke valve B gradually presses onto the plane of the limit block C, the stroke valve B is compressed, and the stroke valve B is placed in the parallel position. The pressure oil reaches the stroke valve B through the locking solenoid valve A. At this time, the locking solenoid valve A is reconnected in the oil circuit and continues to play the role of controlling the hydraulic locking device F.

[0061] Based on a unified inventive concept, and referring to Figure 3 This application also provides a relay control method, applicable to any of the relay control systems described above, comprising the following steps:

[0062] Step 102: In response to the guide vane servo being in the open state and the turbine speed exceeding a preset threshold, the pressure oil, through the first locking unit and the second locking unit, activates the emergency pressure control unit, and the overspeed protection device provides new pressure oil to the emergency pressure control unit through the emergency pressure control unit.

[0063] Step 104: The emergency pressure distribution unit controls the opening of the guide vane servo according to the new pressure oil.

[0064] Step 106: In response to the guide vane relay being in the closed state, the second locking unit is locked, and the third locking unit locks the closed state of the guide vane relay according to the locking state of the second locking unit.

[0065] Specifically, when the guide vane servo is in the closed state, the locking unit is used to lock the closed state of the guide vane servo to prevent accidental opening and potential blade misalignment. The emergency pressure control unit is used to control the on / off state of the emergency pressure control unit, enabling timely closure of the emergency pressure control valve and improving system stability. The first locking unit of the locking system is connected to the second and third locking units. When the guide vane servo is in the closed state, the guide vane servo locks the second locking unit, thus the third locking unit locks the guide vane servo in the closed state. When the guide vane servo is open, the second locking unit is not locked. If the first locking unit malfunctions, it will not affect the control of the guide vane servo, thus avoiding the problem of accidental locking when the guide vane servo is open.

[0066] Furthermore, based on the above-mentioned relay control system, the control method is specifically described as follows: When the turbine is stopped, the locking solenoid valve A is in the engaged state and in the cross position, the pulley of the stroke valve B is pressed on the plane of the limit block C, the stroke valve B is in the parallel position, the pressure oil is cut off, the emergency control pilot valve I is in the engaged state and in the parallel position, the emergency control valve J is in the closed state and in the parallel position, the pressure oil reaches C1 and C2 of the cartridge valve K through the emergency control valve J, and the fine-tuning system L cannot control the guide vane relay E.

[0067] When the guide vane needs to be opened, the locking solenoid valve A is disengaged, and the emergency pilot valve I is disengaged.

[0068] Locking solenoid valve A is disengaged and switched to the parallel position. Pressure oil enters stroke valve B through locking solenoid valve A. After passing through stroke valve B, the pressure oil is divided into two paths. One path enters hydraulic locking device F and exits hydraulic locking device F so that guide vane servo can be opened or closed. The other path goes to hydraulic control valve G and puts hydraulic control valve G in the cross position.

[0069] One path of pressurized oil reaches the hydraulic control valve G through the mechanical overspeed protection device H. Since the hydraulic control valve G is in the cross position, the pressurized oil passes through the hydraulic control valve G to the emergency control pilot valve I. When the emergency control pilot valve I is disengaged and in the cross position, the pressurized oil reaches the emergency control valve J, causing the emergency control valve J to be in the cross position, i.e., open. At this time, the guide vane servo can be opened or closed.

[0070] As the guide vane servo E opens, the servo piston rod D moves to the left, and the limit block C moves to the left accordingly. The pulley of the stroke valve B gradually presses against the inclined surface of the limit block C, and the stroke valve B releases its stroke. The stroke valve B is placed in the cross position, and the pressure oil passes directly through the stroke valve B without passing through the locking solenoid valve A. At this time, the locking solenoid valve A is cut off from the oil circuit and loses its function, thus avoiding the operational risk of accidentally activating the locking solenoid valve A in non-stop conditions.

[0071] Meanwhile, because the pipeline between the stroke valve B and the hydraulic control valve G is pressurized, the hydraulic control valve G can be placed in the cross position. If the pipeline leaks and loses pressure, the hydraulic control valve G will be placed in the parallel position. The pressure oil through the mechanical overspeed device J will be cut off by the hydraulic control valve G. When the pipeline between the hydraulic control valve G and the emergency control pilot valve I loses pressure, the emergency control valve J will be placed in the parallel position, i.e., closed, thereby shutting down the relay and effectively preventing the accident from escalating.

[0072] When the guide vane servo E is closed, the servo piston rod D moves to the right, and the limit block C moves to the right accordingly. The pulley of the stroke valve B gradually presses onto the plane of the limit block C, the stroke valve B is compressed, and the stroke valve B is placed in the parallel position. The pressure oil reaches the stroke valve B through the locking solenoid valve A. At this time, the locking solenoid valve A is reconnected in the oil circuit and continues to play the role of controlling the hydraulic locking device F.

[0073] It should be noted that the method in this embodiment can be executed by a single device, such as a computer or server. The method can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method in this embodiment, and the multiple devices will interact with each other to complete the method described.

[0074] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0075] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a relay control method as described in any of the above embodiments.

[0076] Figure 4 This embodiment illustrates a more specific hardware structure of an electronic device, which may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0077] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0078] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0079] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0080] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0081] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0082] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0083] The electronic devices described above are used to implement a corresponding relay control method in any of the foregoing embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0084] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium that stores computer instructions for causing the computer to execute a relay control method as described in any of the above embodiments.

[0085] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0086] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute a relay control method as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0087] It is understood that before using the technical solutions of the various embodiments in this disclosure, users will be informed of the type, scope of use, and usage scenarios of the personal information involved in an appropriate manner, and user authorization will be obtained.

[0088] For example, upon receiving a user's active request, a prompt message is sent to the user to explicitly inform them that the requested operation will require the acquisition and use of the user's personal information. This allows the user to independently choose, based on the prompt message, whether to provide personal information to the software or hardware such as electronic devices, applications, servers, or storage media performing the operations of this disclosed technical solution.

[0089] As an optional but not limited implementation, in response to a user's active request, sending a prompt message to the user can be done via a pop-up window, where the prompt message can be presented in text format. Furthermore, the pop-up window can also include a selection control allowing the user to choose "agree" or "disagree" to provide personal information to the electronic device.

[0090] It is understood that the above notification and user authorization process are merely illustrative and do not constitute a limitation on the implementation of this disclosure. Other methods that comply with relevant laws and regulations may also be applied to the implementation of this disclosure.

[0091] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in the details for the sake of brevity.

[0092] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be shown in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of the implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0093] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0094] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A relay control system, characterized in that, include: The guide vane relay (E), locking unit (1), emergency pressure control unit (2) and emergency pressure control unit (3) are connected together; The locking unit (1) is used to lock the closed state of the guide vane servo (E) when the guide vane servo (E) is in the closed state, and to control the on / off state of the emergency pressure control unit (2). The emergency pressure control unit (2) is used to control the on / off state of the emergency pressure control unit (3); The locking unit includes a first locking unit (11), a second locking unit (12), and a third locking unit (13). The first locking unit (11) is connected to the third locking unit (13) through the second locking unit (12). When the guide vane relay (E) is in the closed state, the guide vane relay (E) locks the second locking unit (12) so that the third locking unit (13) locks the closed state of the guide vane relay (E) according to the locking state of the second locking unit (12). The first locking unit (11) includes a locking solenoid valve (A), the second locking unit (12) includes a stroke valve (B), and the third locking unit (13) includes a hydraulic locking device (F). The first end of the locking solenoid valve (A) and the first end of the stroke valve (B) are both connected to the oil tank. The second end of the locking solenoid valve (A) is connected to the second end of the stroke valve (B). The third end of the stroke valve (B) is connected to the oil inlet end of the hydraulic locking device (F). When the guide vane servo (E) is in the closed state, the control end of the hydraulic locking device (F) is connected to the switch end of the guide vane servo (E). The guide vane relay (E) includes a relay body and a relay piston rod (D) located inside the relay body; the relay piston rod (D) serves as the switch end of the guide vane relay (E), and when the guide vane relay (E) is in the closed state, the control end of the hydraulic locking device (F) abuts against the relay piston rod (D). A limiting block (C) is provided on the piston rod (D) of the relay located outside the relay body; when the guide vane relay (E) is in the closed state, the pulley end of the stroke valve (B) abuts against the limiting block (C); The emergency pressure control unit (2) includes a hydraulic control valve (G), the control end of which is connected to the third end of the stroke valve (B), and the second end of which is connected to the emergency pressure control unit (3).

2. The relay control system according to claim 1, characterized in that, The emergency pressure distribution unit (3) includes an emergency pilot valve (I) and an emergency pressure distribution valve (J). The first end of the emergency pilot valve (I) is connected to the second end of the hydraulic control valve (G). The second end of the emergency pilot valve (I) is connected to the control end of the emergency pressure distribution valve (J). The first end of the emergency pressure distribution valve (J) is connected to the first control end of the guide vane servo (E). The second end of the emergency pressure distribution valve (J) is connected to the second control end of the guide vane servo (E).

3. A relay control system according to claim 2, characterized in that, A cartridge valve assembly (K) is provided between the emergency pressure regulating valve (J) and the guide vane relay (E). The cartridge valve assembly (K) includes a first cartridge valve (C1), a second cartridge valve (C2), a third cartridge valve (C3), and a fourth cartridge valve (C4). The first end of the first cartridge valve (C1) and the first end of the second cartridge valve (C2) are both connected to the second end of the emergency pressure regulating valve (J). The first end of the third cartridge valve (C3) and the first end of the fourth cartridge valve (C4) are both connected to the first end of the emergency pressure regulating valve (J). The second end of the first cartridge valve (C1) and the second end of the third cartridge valve (C3) are both connected to the second control end of the guide vane relay (E). The second end of the second cartridge valve (C2) and the second end of the fourth cartridge valve (C4) are both connected to the first control end of the guide vane relay (E).

4. The relay control system according to claim 1, characterized in that, It also includes: an overspeed protection unit (4), the control terminal of which is connected to the speed detector, and the output terminal of which is connected to the input terminal of the emergency pressure control unit (2).

5. A relay control system according to claim 4, characterized in that, The overspeed protection unit (4) includes a mechanical overspeed protection device (H), the control terminal of which is connected to the speed detector, and the output terminal of which is connected to the first terminal of the hydraulic control valve (G).

6. A relay control method, applicable to the relay control system according to any one of claims 1-5, characterized in that, include: In response to the guide vane servo being in the open state and the turbine speed exceeding a preset threshold, the pressure oil, through the first locking unit and the second locking unit, activates the emergency pressure control unit, and the overspeed protection device provides new pressure oil to the emergency pressure control unit through the emergency pressure control unit. The emergency pressure distribution unit controls the opening of the guide vane relay according to the new pressure oil; In response to the guide vane relay being in the closed state, the second locking unit is locked, and the third locking unit locks the closed state of the guide vane relay according to the locking state of the second locking unit.

Images