Servomotor control system and method

Abstract

According to the servomotor control system and method, when a guide vane servomotor is in a closed state, a locking unit is used for locking the closed state of the guide vane servomotor, and the situation that the guide vane servomotor is opened by mistake, and consequently the position of a blade is hidden is prevented. The accident pressure distribution control unit is used for controlling on-off of the accident pressure distribution unit, the accident pressure distribution valve can be closed in time, and the stability of the system is improved. A first locking unit of the locking unit is connected with a third locking unit through a second locking unit, when the guide vane servomotor is in a closed state, the guide vane servomotor locks the second locking unit, so that the third locking unit locks the guide vane servomotor in the closed state, when the guide vane servomotor is opened, the second locking unit does not lock, and when the guide vane servomotor is closed, the third locking unit locks the guide vane servomotor in the closed state. When the first locking unit is operated by mistake, control over the guide vane servomotor is not affected, and therefore the problem that the guide vane servomotor is locked by mistake in the open state is solved.

Description

Technical Field

[0001] The present application relates to the technical field of relay control of a hydropower station, and in particular to a relay control system and method. Background Art

[0002] Due to the complex operating conditions of the pump turbine in the energy-storage power station, the relay controls the opening or closing of the guide vanes. The conversion or adjustment of the unit's various operating conditions, such as shutdown, power generation, phase adjustment, and pumping, all need to be achieved through the action of the relay. However, during the control process of the relay, if the locking solenoid valve is mispositioned, it will cause the relay to malfunction, resulting in the hidden danger of changes in the blade position. Summary of the invention

[0003] In view of this, the purpose of the present application is to provide a relay control system and method to solve the problem of servomotor malfunction in the prior art, which causes the blade position to change.

[0004] Based on the above purpose, the present application provides a relay control system, including: a guide vane servomotor, a locking unit, an emergency pressure distribution 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 servomotor when the guide vane servomotor is in the closed state, and to control the on and off of the emergency pressure distribution control unit;

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

[0007] Wherein, 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, and when the guide vane servo is in a closed state, the guide vane servo locks the second locking unit so that the third locking unit locks the closed state of the guide vane servo according to the locking state of the second locking unit.

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

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

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

[0011] Optionally, the emergency pressure distribution control unit includes a hydraulically controlled valve, a control end of the hydraulically controlled valve is connected to the third end of the travel valve, and a second end of the hydraulically controlled valve is connected to the emergency pressure distribution unit.

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

[0013] Optionally, a cartridge valve group is provided between the emergency pressure-controlling valve and the guide vane servomotor, the cartridge valve group comprising a first cartridge valve, a second cartridge valve, a third cartridge valve and a fourth cartridge valve, the first end of the first cartridge valve and the first end of the second cartridge valve are both connected to the second end of the emergency pressure-controlling valve, the first end of the third cartridge valve and the first end of the fourth cartridge valve are both connected to the first end of the emergency pressure-controlling valve, the second end of the first cartridge valve and the second end of the third cartridge valve are both connected to the second control end of the guide vane servomotor, and the second end of the second cartridge valve and the second end of the fourth cartridge valve are both connected to the first control end of the guide vane servomotor.

[0014] Optionally, it also includes: an overspeed protection unit, the control end of the overspeed protection unit is connected to the speed detector, and the output end of the overspeed protection unit is connected to the input end of the accident pressure control unit.

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

[0016] Based on the unified inventive concept, the present application also provides a relay control method, which is applicable to any of the above-mentioned relay control systems, including:

[0017] In response to the guide vane servomotor being in an open state and the rotation speed of the turbine exceeding a preset threshold, the pressure oil is conducted to the emergency pressure distribution control unit via the first locking unit and the second locking unit, and the overspeed protection device provides new pressure oil to the emergency pressure distribution unit via the emergency pressure distribution control unit;

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

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

[0020] As can be seen from the above, the present application provides a relay control system and method, the system comprising: a connected guide vane servomotor, a locking unit, an emergency pressure distribution control unit and an emergency pressure distribution unit; the locking unit is used to lock the closed state of the servomotor when the guide vane servomotor is in a closed state, and is used to control the on and off of the emergency pressure distribution control unit; the emergency pressure distribution control unit is used to control the on and off of the emergency pressure distribution unit; wherein the locking unit comprises 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, and when the guide vane servomotor is in a closed state, the guide vane servomotor locks the second locking unit so that the third locking unit locks the closed state of the guide vane servomotor according to the locking state of the second locking unit. When the guide vane servomotor is in a closed state, the locking unit is used to lock the closed state of the guide vane servomotor to prevent the guide vane servomotor from opening by mistake, resulting in hidden dangers of blade position. The emergency pressure distribution control unit is used to control the on and off of the emergency pressure distribution unit, and can close the emergency pressure distribution valve in time to improve the stability of the system. Among them, the first locking unit of the 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 guide vane relay in a closed state. When the guide vane relay is opened, the second locking unit is not locked. When the first locking unit is misoperated, it will not affect the control of the guide vane relay. In this way, the problem of mislocking the guide vane relay in an open state is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0023] Figure 2 A schematic diagram of the gas circuit structure of a relay control system according to an embodiment of the present application;

[0024] Figure 3 A schematic flow chart of a relay control method according to an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the hardware structure of an electronic device according to an embodiment of the present application.

[0026] In the attached figure:

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

[0028] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like 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 the present application are described in detail below with reference to the accompanying drawings.

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

[0032] The locking unit 1 is used to lock the closed state of the guide vane servomotor E when the guide vane servomotor E is in the closed state, and is used to control the on and off of the emergency pressure distribution control unit 2;

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

[0034] Wherein, 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, and when the guide vane servomotor E is in a closed state, the guide vane servomotor E locks the second locking unit 12 so that the third locking unit 13 locks the closed state of the guide vane servomotor E according to the locking state of the second locking unit 12.

[0035] Specifically, the guide vane servomotor E is a device connected to the water guide mechanism of the water turbine, such as the guide vane servomotor E connected to the guide vane, and is used to adjust the opening size of the water guide mechanism. The guide vane servomotor E has the functions of opening, closing and emergency shutdown of the guide vane, so as to realize the ability of arbitrary opening adjustment and emergency shutdown of the guide vane servomotor E. When the guide vane servomotor E is in the closed state, the locking unit 1 is used to lock the closed state of the guide vane servomotor E to prevent the guide vane servomotor E from opening by mistake, resulting in hidden dangers of the blade position. The accident pressure distribution control unit 2 is used to control the on and off of the accident pressure distribution unit 3, and can close the accident pressure distribution valve J in time to improve the stability of the system. Among them, 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 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 guide vane relay E in the closed state. When the guide vane relay E is opened, the second locking unit 12 is not locked. When the first locking unit 11 is misoperated, it will not affect the control of the guide vane relay E. In this way, the problem of mislocking the guide vane relay E in the open state is avoided.

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

[0037] Specifically, the first end of the locking solenoid valve A is the oil inlet end of the locking solenoid valve, and the second end of the locking solenoid valve is the oil outlet end of the locking solenoid valve. The first end of the stroke valve B is the first oil inlet end of the stroke valve B, the second end of the stroke valve B is the second oil inlet end of the stroke valve B, and the third end of the stroke valve B is the oil outlet end of the stroke valve B. 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 servomotor E is in the closed state, the guide vane servomotor E locks the second locking unit 12, that is, the stroke valve B is locked and oil is not passed. When the stroke valve B is locked and oil is not passed, there is no oil circulation in the hydraulic locking device, so it is in a locked state, and the switch end of the guide vane servomotor E is locked.

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

[0039] Specifically, Figure 2 As shown, the guide vane servomotor E includes a servomotor body and a servomotor piston rod D. The servomotor body may be an oil cylinder, and one end of the servomotor piston rod D with a piston is located inside the servomotor body. Two oil inlet holes are provided on the side wall of the servomotor body, one of which is used to control the extension of the piston rod (e.g., to control the closing of the guide vane servomotor E), and the other of which is used to control the retraction of the piston rod (e.g., to control the opening of the guide vane servomotor E). When the servomotor piston rod D is fully extended out of the servomotor body except for the piston, the servomotor is in a closed state, thereby controlling the guide vane to be closed. In the closed state of the guide vane servomotor E, misoperation that causes the guide vane servomotor E to be opened by mistake is avoided. Therefore, the servomotor piston rod D of the guide vane servomotor E needs to be locked by a hydraulic locking device, and the hydraulic lock end of the hydraulic locking device abuts against the servomotor piston rod D to prevent the piston rod from moving.

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

[0041] Specifically, a limit block C is provided above the relay piston rod D, 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 limit block C. The limit block C is used to control the conduction state of the stroke valve B. When the guide vane servomotor E is closed, the limit block C is located below the stroke valve B. At this time, the stroke valve B is placed in a parallel position, that is, a closed-chamber state. When the stroke valve B is in the closed-chamber state, there is no pressure between the stroke valve B and the hydraulic locking device, so that the hydraulic locking device is in a locked state, and the servomotor piston rod D is abutted and locked to avoid accidental opening of the guide vane servomotor E.

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

[0043] Specifically, when the guide vane servomotor E is in an open state, the limit block C of the guide vane servomotor E disengages from the stroke valve B, so that the stroke valve B is in a cross position, and the stroke valve B is turned on, and the pressure oil is transmitted to the hydraulic control valve G, so that the hydraulic control valve G is turned on in the cross position. The turning on of the hydraulic control valve G can configure a suitable pressure for the accident pressure distribution unit 3.

[0044] When the guide vane servomotor E is in the closed state, the limit block C of the guide vane servomotor E lifts the roller end of the travel valve B, so that the travel valve B is in the parallel position, the travel valve B is cut off, and there is no pressure on the pipeline between the third end of the travel valve B and the hydraulic control valve G. Therefore, the hydraulic control valve G is in the parallel position, the hydraulic control valve G is cut off, and the accident pressure distribution unit 3 is closed. Then all the oil circuits are blocked and in a locked state, thereby ensuring the stability of the system.

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

[0046] Specifically, when the hydraulic control valve G is in the cross position, the overspeed protection device transmits the new pressure oil to the emergency pressure distribution pilot valve I through the hydraulic control valve G. The emergency pressure distribution pilot valve I is turned on and transmits the new pressure oil to the emergency pressure distribution valve J. The emergency pressure distribution valve J distributes new pressure to the guide vane servomotor E, thereby controlling the opening and closing of the guide vane servomotor E. In this way, the control of the guide vane servomotor E on the guide vane opening can be accurately controlled.

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

[0048] Specifically, Figure 2 As shown, the first cartridge valve C1 and the third cartridge valve C3 are connected to the oil inlet hole of the retracted end of the driving servomotor piston rod D of the guide vane servomotor E, and the second cartridge valve C2 and the fourth cartridge valve C4 are connected to the oil inlet hole of the extended end of the driving servomotor piston rod D of the guide vane servomotor 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, pressure oil is supplied to the guide vane servomotor E through the control of each cartridge valve to control the opening and closing degree of the guide vane servomotor E.

[0049] Furthermore, if 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 achieve the pressure control 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, which can cooperate 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 servomotor E, and quickly control the opening of the guide vane servomotor E.

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

[0051] Furthermore, the overspeed protection unit 4 includes a mechanical overspeed protection device H, a control end of the mechanical overspeed protection device H is connected to the speed detector, and an output end of the mechanical protection device is connected to the first end 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 speed of the turbine is too fast, the mechanical transfer protection device will transfer the oil in the oil tank to the hydraulic control valve G according to a certain pressure. The hydraulic control valve G transfers the pressure oil to the emergency pressure distribution unit 3 to provide pressure oil for the guide vane relay E to control the opening of the guide vane relay E.

[0053] It should be noted that the embodiments of the present application can be further described in the following manner:

[0054] When the turbine is shut down, the locking solenoid valve A is in the engaged state and is in the cross position, the pulley of the travel valve B is pressed on the plane of the limit block C, the travel valve B is in the parallel position, the pressure oil is cut off, the emergency pressure-matching pilot valve I is in the engaged state and is in the parallel position, the emergency pressure-matching valve J is in the closed cavity state and is in the parallel position, the pressure oil reaches C1 and C2 of the cartridge valve K through the emergency pressure-matching valve J, and the fine-tuning system L cannot control the guide vane relay E.

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

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

[0057] One path of pressure 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 pressure oil passes through the hydraulic control valve G and reaches the emergency distribution pilot valve I. The emergency distribution pilot valve I exits, the emergency distribution pilot valve I is in the cross position, and the pressure oil reaches the emergency pressure distribution valve J, which puts the emergency pressure distribution valve J in the cross position, that is, the cavity is open. At this time, the guide vane relay E can be opened or closed.

[0058] As the guide vane servomotor E opens, the servomotor piston rod D moves to the left, and the limit block C moves to the left accordingly. The pulley of the travel valve B is gradually pressed onto the inclined surface of the limit block C, and the travel valve B is released. The travel valve B is placed in the cross position, and the pressure oil passes directly through the travel valve B instead of the locking spindle solenoid valve A. At this time, the locking spindle solenoid valve A is cut off from the oil circuit and loses its function, thus avoiding the operational risk of misoperation of the locking spindle solenoid valve A in the non-shutdown state.

[0059] At the same time, since the pipeline from the stroke valve B to 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, and the pressure oil passing through the mechanical overspeed device J will be cut off by the hydraulic control valve G. The pipeline from the hydraulic control valve G to the accident pilot valve I will lose pressure, and the accident pressure distribution valve J will be placed in the parallel position, that is, the cavity will be closed, so as to close the relay, which can effectively prevent the accident from expanding.

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

[0061] Based on the unified invention concept, refer to Figure 3 The present application also provides a relay control method, which is applicable to any of the above-mentioned relay control systems, and comprises the following steps:

[0062] Step 102: In response to the guide vane servomotor being in an open state and the rotation speed of the turbine exceeding a preset threshold, the pressure oil is conducted to the emergency pressure distribution control unit via the first locking unit and the second locking unit, and the overspeed protection device provides new pressure oil to the emergency pressure distribution unit via the emergency pressure distribution control unit;

[0063] Step 104, the emergency pressure distribution unit controls the opening of the guide vane servomotor according to the new pressure oil;

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

[0065] Specifically, when the guide vane servomotor is in the closed state, the locking unit is used to lock the closed state of the guide vane servomotor to prevent the guide vane servomotor from opening by mistake, which may cause hidden dangers in the position of the blades. The emergency pressure distribution control unit is used to control the on and off of the emergency pressure distribution unit, and can close the emergency pressure distribution valve in time to improve the stability of the system. Among them, the first locking unit of the locking unit is connected to the third locking unit through the second locking unit. When the guide vane servomotor is in the closed state, the guide vane servomotor locks the second locking unit, so that the third locking unit locks the guide vane servomotor in the closed state. When the guide vane servomotor is opened, the second locking unit is not locked. When the first locking unit is misoperated, it will not affect the control of the guide vane servomotor. In this way, the problem of the guide vane servomotor being mistakenly locked in the open state is avoided.

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

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

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

[0069] One path of pressure 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 pressure oil passes through the hydraulic control valve G and reaches the emergency distribution pilot valve I. The emergency distribution pilot valve I exits, the emergency distribution pilot valve I is in the cross position, and the pressure oil reaches the emergency pressure distribution valve J, which puts the emergency pressure distribution valve J in the cross position, that is, the cavity is open. At this time, the guide vane relay E can be opened or closed.

[0070] As the guide vane servomotor E opens, the servomotor piston rod D moves to the left, and the limit block C moves to the left accordingly. The pulley of the travel valve B is gradually pressed onto the inclined surface of the limit block C, and the travel valve B is released. The travel valve B is placed in the cross position, and the pressure oil passes directly through the travel valve B instead of the locking spindle solenoid valve A. At this time, the locking spindle solenoid valve A is cut off from the oil circuit and loses its function, thus avoiding the operational risk of misoperation of the locking spindle solenoid valve A in the non-shutdown state.

[0071] At the same time, since the pipeline from the stroke valve B to 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, and the pressure oil passing through the mechanical overspeed device J will be cut off by the hydraulic control valve G. The pipeline from the hydraulic control valve G to the accident pilot valve I will lose pressure, and the accident pressure distribution valve J will be placed in the parallel position, that is, the cavity will be closed, so as to close the relay, which can effectively prevent the accident from expanding.

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

[0073] It should be noted that the method of the embodiment of the present application can be performed by a single device, such as a computer or server. The method of this embodiment can also be applied to a distributed scenario and completed by multiple devices cooperating with each other. In the case of such a distributed scenario, one of the multiple devices can only perform one or more steps in the method of the embodiment of the present application, and the multiple devices will interact with each other to complete the described method.

[0074] It should be noted that the above describes some embodiments of the present 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 an order different from that in the above embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0075] Based on the same inventive concept, corresponding to any of the above-mentioned embodiments and methods, the present 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 when the processor executes the program, a relay control method described in any of the above embodiments is implemented.

[0076] Figure 4 A more specific schematic diagram of the hardware structure of an electronic device provided in this embodiment is shown, and the device may include: a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040 are connected to each other through the bus 1050 in the device.

[0077] The processor 1010 can be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an 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 may be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 may store an operating system and other application programs. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program codes are stored in the memory 1020 and are called and executed by the processor 1010.

[0079] The input / output interface 1030 is used to connect the input / output module to realize information input and output. The input / output module can be configured in the device as a component (not shown in the figure), or it can be externally connected to the device to provide corresponding functions. The input device may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output device may include a display, a speaker, a vibrator, an indicator light, etc.

[0080] The communication interface 1040 is used to connect a communication module (not shown) to realize communication interaction between the device and other devices. The communication module can realize communication through a wired mode (such as USB, network cable, etc.) or a wireless mode (such as mobile network, WIFI, Bluetooth, etc.).

[0081] The bus 1050 includes a path that transmits information between the various components of the device (eg, the processor 1010, the memory 1020, the input / output interface 1030, and the communication interface 1040).

[0082] It should be noted that, although the above device only shows the processor 1010, the memory 1020, the input / output interface 1030, the communication interface 1040 and the bus 1050, in the specific implementation process, the device may also include other components necessary for normal operation. In addition, it can be understood by those skilled in the art that the above device may also only include the components necessary for implementing the embodiments of the present specification, and does not necessarily include all the components shown in the figure.

[0083] The electronic device of the above embodiment is used to implement a corresponding relay control method in any of the above embodiments, and has the beneficial effects of the corresponding method embodiment, which will not be described in detail here.

[0084] Based on the same inventive concept, corresponding to any of the above-mentioned embodiment methods, the present application also provides a non-transitory computer-readable storage medium, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable 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, modules of programs, 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 technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0086] The computer instructions stored in the storage medium of the above embodiment are used to enable 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 understandable that before using the technical solutions of each embodiment of the present disclosure, the type, scope of use, usage scenarios, etc. of the personal information involved will be informed to the user in an appropriate manner, and the user's authorization will be obtained.

[0088] For example, in response to receiving an active request from a user, a prompt message is sent to the user to clearly remind the user that the operation requested to be performed will require obtaining and using the user's personal information. Thus, the user can independently choose whether to provide personal information to software or hardware such as an electronic device, application, server, or storage medium that performs the operation of the technical solution of the present disclosure according to the prompt message.

[0089] As an optional but non-limiting implementation, in response to receiving the user's active request, the prompt information may be sent to the user in the form of a pop-up window, in which the prompt information may be presented in text form. In addition, the pop-up window may also carry a selection control for the user to choose "agree" or "disagree" to provide personal information to the electronic device.

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

[0091] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0092] In addition, to simplify the description and discussion, and in order not to make the embodiments of the present application difficult to understand, the known power supply / ground connection with the integrated circuit (IC) chip and other components may or may not be shown in the provided drawings. In addition, the device can be shown in the form of a block diagram to avoid making the embodiments of the present application difficult to understand, and this also takes into account the fact that the details of the implementation of these block diagram devices are highly dependent on the platform to be implemented in the embodiments of the present application (that is, these details should be fully within the scope of understanding of those skilled in the art). In the case of elaborating specific details (e.g., circuits) to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details or when these specific details are changed. Therefore, these descriptions should be considered to be illustrative rather than restrictive.

[0093] Although the present application has been described in conjunction with specific embodiments of the present application, many replacements, 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 use the embodiments discussed.

[0094] The embodiments of the present 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 the present application should be included in the scope of protection of the present application.

Claims

1. A relay control system, characterized in that: include: A guide vane servomotor (E), a locking unit (1), an emergency pressure distribution control unit (2) and an emergency pressure distribution unit (3) connected thereto; The locking unit (1) is used to lock the closed state of the guide vane servomotor (E) when the guide vane servomotor (E) is in the closed state, and is used to control the on and off of the emergency pressure distribution control unit (2); The emergency pressure distribution control unit (2) is used to control the on and off of the emergency pressure distribution unit (3); The locking unit comprises 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) via the second locking unit (12); when the guide vane servomotor (E) is in a closed state, the guide vane servomotor (E) locks the second locking unit (12) so that the third locking unit (13) locks the closed state of the guide vane servomotor (E) according to the locked state of the second locking unit (12).

2. A relay control system according to claim 1, characterized in that: The first locking unit (11) comprises a locking spindle electromagnetic valve (A), the second locking unit (12) comprises a travel valve (B), and the third locking unit (13) comprises a hydraulic locking spindle device (F), the first end of the locking spindle electromagnetic valve (A) and the first end of the travel valve (B) are both connected to the oil tank, the second end of the locking spindle electromagnetic valve (A) is connected to the second end of the travel valve (B), the third end of the travel valve (B) is connected to the oil inlet end of the hydraulic locking device (F), and when the guide vane servomotor (E) is in a closed state, the control end of the hydraulic locking spindle device (F) is connected to the switch end of the guide vane servomotor (E).

3. A relay control system according to claim 2, characterized in that: The guide vane servomotor (E) comprises a servomotor body and a servomotor piston rod (D) located inside the servomotor body; the servomotor piston rod (D) serves as a switch end of the guide vane servomotor (E); when the guide vane servomotor (E) is in a closed state, the control end of the hydraulic locking device (F) abuts against the servomotor piston rod (D).

4. A relay control system according to claim 3, characterized in that: A limit block (C) is provided on the servomotor piston rod (D) located outside the servomotor body; when the guide vane servomotor (E) is in a closed state, the pulley end of the travel valve (B) abuts against the limit block (C).

5. A relay control system according to claim 2, characterized in that: The emergency pressure distribution control unit (2) comprises a hydraulic control valve (G), the control end of the hydraulic control valve (G) is connected to the third end of the travel valve (B), and the second end of the hydraulic control valve (G) is connected to the emergency pressure distribution unit (3).

6. A relay control system according to claim 5, characterized in that: The emergency pressure matching unit (3) comprises an emergency pressure matching pilot valve (I) and an emergency pressure matching valve (J), wherein the first end of the emergency pressure matching pilot valve (I) is connected to the second end of the hydraulic control valve (G), the second end of the emergency pressure matching pilot valve (I) is connected to the control end of the emergency pressure matching valve (J), the first end of the emergency pressure matching valve (J) is connected to the first control end of the guide vane servomotor (E), and the second end of the emergency pressure matching valve (J) is connected to the second control end of the guide vane servomotor (E).

7. A relay control system according to claim 6, characterized in that: A cartridge valve group (K) is provided between the emergency pressure-control valve (J) and the guide vane servomotor (E), and the cartridge valve group (K) comprises 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-control 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-control 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 servomotor (E); and 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 servomotor (E).

8. A relay control system according to claim 3, characterized in that: It also comprises an overspeed protection unit (4), wherein the control end of the overspeed protection unit (4) is connected to the rotation speed detector, and the output end of the overspeed protection unit (4) is connected to the input end of the accident pressure distribution control unit (2).

9. A relay control system according to claim 8, characterized in that: The overspeed protection unit (4) comprises a mechanical overspeed protection device (H), a control end of the mechanical overspeed protection device (H) is connected to the speed detector, and an output end of the mechanical protection device is connected to a first end of the hydraulic control valve (G).

10. A servomotor control method, applicable to a servomotor control system according to any one of claims 1 to 9, characterized in that: include: In response to the guide vane servomotor being in an open state and the rotation speed of the turbine exceeding a preset threshold, the pressure oil is conducted to the emergency pressure distribution control unit via the first locking unit and the second locking unit, and the overspeed protection device provides new pressure oil to the emergency pressure distribution unit via the emergency pressure distribution control unit; The emergency pressure distribution unit controls the opening of the guide vane servomotor according to the new pressure oil; In response to the guide vane servo being in the closed state, the second locking unit is locked, and the third locking unit locks the closed state of the guide vane servo according to the locking state of the second locking unit.

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