CN218122483U - Large-scale hydraulic turbine cylindrical valve digital cylinder control system - Google Patents
Large-scale hydraulic turbine cylindrical valve digital cylinder control system Download PDFInfo
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- CN218122483U CN218122483U CN202222496740.1U CN202222496740U CN218122483U CN 218122483 U CN218122483 U CN 218122483U CN 202222496740 U CN202222496740 U CN 202222496740U CN 218122483 U CN218122483 U CN 218122483U
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Abstract
The utility model relates to the technical field of water inlet valve control of a water turbine generator set, in particular to a cylindrical valve digital cylinder control system of a large-scale water turbine, which comprises a double-CPU hot standby redundant controller, a remote station component and a double-position ring digital hydraulic servo control component; the dual-CPU hot standby redundant controller comprises a CPU1# controller and a CPU2# controller which are connected through an optical fiber, and the CPU1# controller and the CPU2# controller are respectively connected with the remote station component through the Ethernet; the double-position-ring digital hydraulic servo control assembly comprises N hydraulic control drivers, N hydraulic control devices and N displacement transmitters; the remote station component and N hydraulic control drivers form a POWERLINK real-time bus ring network redundancy driver through optical fibers; the hydraulic control driver is connected with the corresponding hydraulic control device through a cable; the hydraulic control driver is connected with the corresponding displacement transmitter through a cable. Through this control system, can effectively solve the low and unfavorable problem of control of reliability.
Description
Technical Field
The utility model relates to a hydroelectric set inlet valve control technical field especially relates to a large-scale hydraulic turbine barrel valve digital cylinder control system.
Background
The cylindrical valve is one of the water inlet valve types of the water turbine generator set, and plays a role in separating and communicating the water inlet pipe. Whether the cylindrical valve can be reliably opened and closed relates to the safety of the water turbine generator set. The control technology of the cylinder valve control system is to simultaneously control a plurality of cylinder valve force receivers to be synchronously opened or closed. The cylindrical valve control system has the characteristics of stability, reliability and the like, and also has good fault-tolerant capability and high-precision synchronous motion so as to ensure the safety of a hydraulic power plant and prevent major accidents.
The currently applied control methods of the cylindrical valve are chain synchronization, hydraulic motor and servo proportional valve synchronization and digital cylinder hydraulic synchronization based on a stepping motor. The three schemes have various characteristics, and the digital cylinder hydraulic synchronization based on the stepping motor is the latest and most advanced control scheme at present, but the following core problems are still to be solved:
1. the controller fault tolerance is low. At present, a single controller is adopted in a digital cylinder hydraulic synchronous control system based on a stepping motor, and fault-tolerant measures are lacked. When the controller fails, the whole control system cannot work;
2. the on-off rate is low. The range of the rotation speed of the original stepping motor is narrow, and the original stepping motor can only work below the range of about 200rpm under the condition of ensuring the output of 6 N.m. The time for normally opening or closing the cylinder valve once is as long as 90S based on a stepping motor digital cylinder hydraulic synchronous control system, and especially under the condition of closing the valve in an accident, the safety of a power plant can be endangered by overlong closing time.
3. And the field anti-interference capability is weak. A digital cylinder hydraulic synchronous control system based on a stepping motor adopts pulse control, and the field anti-interference capability of a driver is weak. The driver needs to be separately provided with an insulating mounting plate during the mounting process. The process requirements of the signal cable and the control cable of the stepping motor are strict: the control cable needs to be shielded at two ends, the input signal cable needs to be shielded at one end, redundant wires need to be cut off and insulated, and the voltage of the signal cable to the ground is not allowed to exceed 60VDC at most.
4. A driver of the hydraulic synchronous control system based on the stepping motor digital cylinder has no self-diagnosis and no state monitoring function.
5. The digital cylinder hydraulic synchronous control system based on the stepping motor needs to feed back an external position to a PLC CPU in a closed loop mode, so that the real-time performance is reduced, and the operation load of the PLC is increased.
In the prior art, a chinese utility model patent document with publication number CN208092455U and publication date of 11/13 in 2018 is proposed to solve the above existing technical problems, and the technical scheme disclosed in the patent document is as follows: a cylindrical valve redundancy control device comprises a circuit breaker, a power supply module, an input signal, a main controller, a standby controller and an output signal. The alternating current and direct current 220V voltage of the system is connected to a power supply module through a circuit breaker to be converted into a direct current 24V power supply, the 24V direct current power supply is provided for the system, input signals are simultaneously connected to a main controller and a standby controller, the two controllers operate simultaneously, meanwhile, if the controller has a fault, a fault signal can be directly connected to the input module of the other controller through an output module of the controller, if the main controller does not have the fault, the output module of the main controller controls the system, and if the main controller has the fault, the standby controller is normal, and the output module of the standby controller controls the control system.
In the actual use process, the following problems can occur in the technical scheme:
(1) The redundancy mode belongs to the field of passive redundancy of parts of a repeated configuration system, namely when a main controller fails, a standby controller is involved in control work, a main controller can only be switched passively, the standby controller does not participate in control for a long time and is easy to fail, and the reliability of the system is reduced.
(2) The major disturbance exists in the main-standby control switching process, the disturbance may cause blockage of the cylindrical valve, and therefore the safety of a unit is endangered in the process of emergency closing of the cylindrical valve.
(3) When a single-side communication fault occurs, the control system can perform main-standby switching, and the stability of the system is reduced.
(4) The device does not have the double-network-segment IEC61850 communication function, and is not beneficial to the monitoring system to monitor the cylindrical valve control system.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a large-scale hydraulic turbine barrel valve digital cylinder control system can effectively solve the problem that the reliability is low and be unfavorable for the control.
The utility model discloses a realize through adopting following technical scheme:
the utility model provides a large-scale hydraulic turbine cylindric valve digital cylinder control system which characterized in that: the system comprises a double-CPU hot standby redundant controller, a remote station assembly and a double-position ring digital hydraulic servo control assembly; the remote station assembly comprises an interface module and a motion control module; the dual-CPU hot standby redundancy controller comprises a CPU1# controller and a CPU2# controller which are connected through optical fibers, wherein the CPU1# controller and the CPU2# controller are respectively connected with an interface module of a remote station assembly through Ethernet; the double-position-ring digital hydraulic servo control assembly comprises N hydraulic control drivers, N hydraulic control devices and N displacement transmitters; the motion control module of the remote station component and N hydraulic control drivers form a driver POWERLINK real-time bus ring network redundancy through optical fibers; each hydraulic control driver is respectively connected with the corresponding hydraulic control device through a cable; each hydraulic control driver is respectively connected with the corresponding displacement transmitter through a cable.
The intelligent gateway system also comprises an exchanger and two intelligent gateways, wherein the two intelligent gateways are respectively connected with the exchanger through Ethernet; the interface module of the remote station assembly is connected to the switch via an ethernet network.
Still include the host computer controller, the host computer controller passes through ethernet and links to each other with the switch.
The remote station assembly further includes a digital input module, a digital output module, an analog input module, and an analog output module.
The double-position-ring digital hydraulic servo control assembly comprises six hydraulic control drivers, six hydraulic control devices and six displacement transmitters.
Each hydraulic control device comprises a servo motor, a cylindrical valve digital cylinder and a cylindrical valve force receiver.
The double-position-ring digital hydraulic servo control assembly can support a direct processing double encoder, the double encoder comprises a first encoder and a second encoder, and the first encoder is used for feeding back the movement position of the servo motor; the second encoder is used to measure the barrel valve position.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses in, two CPU redundant controller adopt hot spare redundancy mode to carry out data acquisition, data processing and calculation simultaneously, and two controllers carry out data interaction in real time. When one controller fails, undisturbed switching is realized, and the safety of the system is enhanced. The dual CPU redundant controllers form an I/O ring network. The I/O ring network has the advantages that when any communication fails, the control system can still work normally, and the system stability is improved.
The hydraulic control driver and the hydraulic control device in the double-position-ring digital hydraulic servo control assembly form a first-layer position ring, and the hydraulic control driver, the hydraulic control device and the displacement transmitter form a second-layer position ring. The double-position ring digital hydraulic servo control assembly solves the problem of narrow rotating speed range of the original stepping motor, obviously improves the opening speed and the closing speed of the cylindrical valve of the large-scale water turbine, and improves the safety of a power station; the problems of step loss, demagnetization, weak anti-interference capability, no self-diagnosis and state monitoring functions and the like caused by stepping pulse control can be solved, the stability and the accuracy of control and the high real-time high synchronization requirement of multiple cylinders of the cylindrical valve are obviously improved, the deviation correcting times in the process of opening or closing the cylindrical valve are reduced, and the blockage of the cylindrical valve caused by the problems of step loss, interference and the like is avoided.
The double-position-loop digital hydraulic servo control assembly adopts a drive system of a POWERLINK bus, so that the hydraulic control driver has higher self-diagnosis capability and more state monitoring characteristics.
2. The utility model discloses in, two CPU redundant controller can realize two net section IEC61850 communication functions through the switch, improve the fault-tolerant ability of the external communication of system.
3. Each hydraulic control device comprises a servo motor, a cylindrical valve digital cylinder and a cylindrical valve force receiver, so that the double-position ring digital hydraulic servo control assembly has higher acceleration and deceleration capacity, higher torque capacity and higher speed stability.
The double-position-ring digital hydraulic servo control assembly can judge the stress condition of the current system through software, and avoid or process mechanical conditions such as locked rotor, stuck and the like.
4. The double-position-ring digital hydraulic servo control assembly supports direct processing of position feedback of double encoders, has extremely high real-time responsiveness, and reduces the load of a system CPU.
5. The upper computer controller can realize human-computer interaction, and can play a role in controlling, monitoring and analyzing the whole system.
Drawings
The invention will be described in further detail with reference to the following description taken in conjunction with the accompanying drawings and detailed description, in which:
fig. 1 is a schematic structural view of the present invention;
the labels in the figure are:
1. CPU1# controller, 2, CPU2# controller, 3, remote station subassembly, 4, host computer controller, 5, switch, 6, intelligent gateway, 7, hydraulic control driver, 8, hydraulic control device, 9, displacement transmitter, 10, motion control module.
Detailed Description
Example 1
As the utility model discloses basic embodiment, the utility model discloses a large-scale hydraulic turbine cylindric valve digital cylinder control system, including two CPU heat backup redundant controller, remote station subassembly 3 and two position ring digital hydraulic pressure servo control subassemblies. The remote station assembly 3 includes an interface module and a motion control module 10. The dual-CPU hot standby redundancy controller comprises a CPU1# controller 1 and a CPU2# controller 2 which are connected through optical fibers, wherein the CPU1# controller 1 and the CPU2# controller 2 are respectively connected with an interface module of a remote station component 3 through Ethernet. The double-position-ring digital hydraulic servo control assembly comprises N hydraulic control drivers 7, N hydraulic control devices 8 and N displacement transmitters 9, wherein the value of N can be 4. The motion control module 10 of the remote station assembly 3 and 4 hydraulic control drivers 7 form a power link real-time bus ring network redundancy driver through optical fibers. Each hydraulic control driver 7 is respectively connected with a corresponding hydraulic control device 8 through a cable; each hydraulic control driver 7 is connected with a corresponding displacement transmitter 9 through a cable.
Example 2
As a preferred embodiment, the utility model discloses a large-scale hydraulic turbine cylindric valve digital cylinder control system, be equipped with redundant controller, remote station subassembly 3, two position ring digital hydraulic pressure servo control subassembly, host computer controller 4, switch 5 and two intelligent gateway 6 including two CPU heats. The remote station assembly 3 includes an interface module and a motion control module 10. The dual-CPU hot standby redundancy controller comprises a CPU1# controller 1 and a CPU2# controller 2 which are connected through optical fibers, wherein the CPU1# controller 1 and the CPU2# controller 2 are respectively connected with an interface module of a remote station component 3 through Ethernet. The interface module of the remote station assembly 3 is connected to the switch 5 via ethernet. The two intelligent gateways 6 are respectively connected with the switch 5 through Ethernet. The upper computer controller 4 is connected with the switch 5 through the Ethernet.
The double-position loop digital hydraulic servo control assembly comprises 5 hydraulic control drivers 7, 5 hydraulic control devices 8 and 5 displacement transmitters 9. The motion control module 10 of the remote station assembly 3 and 5 hydraulic control drivers 7 form a power link real-time bus ring network redundancy driver through optical fibers. Each hydraulic control driver 7 is respectively connected with a corresponding hydraulic control device 8 through a cable; each hydraulic control driver 7 is connected with a corresponding displacement transmitter 9 through a cable.
Example 3
As another preferred embodiment of the utility model, the utility model discloses a large-scale hydraulic turbine cylindric valve digital cylinder control system, including two CPU heat backup redundant controller, remote station subassembly 3 and two position ring digital hydraulic pressure servo control subassemblies. The remote station assembly 3 includes an interface module and a motion control module 10. The dual-CPU hot standby redundancy controller comprises a CPU1# controller 1 and a CPU2# controller 2 which are connected through optical fibers, wherein the CPU1# controller 1 and the CPU2# controller 2 are respectively connected with an interface module of a remote station component 3 through Ethernet.
The double-position-loop digital hydraulic servo control assembly comprises N hydraulic control drivers 7, N hydraulic control devices 8 and N displacement transmitters 9. The motion control module 10 of the remote station assembly 3 and the N hydraulic control drivers 7 form a driver POWERLINK real-time bus ring network redundancy through optical fibers. Each hydraulic control device 8 comprises a servo motor, a barrel valve digital cylinder and a barrel valve force receiver. Each hydraulic control driver 7 is respectively connected with a corresponding hydraulic control device 8 through a cable; each hydraulic control driver 7 is connected with a corresponding displacement transmitter 9 through a cable.
The double-position-ring digital hydraulic servo control assembly can support a direct processing double encoder, the double encoder comprises a first encoder and a second encoder, and the first encoder is used for feeding back the movement position of the servo motor; the second encoder is used to measure a barrel valve position. The double-position-ring digital hydraulic servo control assembly has extremely high real-time responsiveness, and the load of a system CPU is reduced.
Example 4
As the best mode of the present invention, refer to the attached drawing 1 of the specification, the present invention includes a digital cylinder control system for a large-scale water turbine cylindrical valve, including a dual-CPU hot standby redundant editable controller, a remote station module 3, a host computer controller 4, a switch 5, two intelligent gateways 6 and a dual-position ring digital hydraulic servo control module. The upper computer controller 4 is an upper computer interface control unit, so that man-machine interaction is realized, and the upper computer controller 4 plays a role in controlling, monitoring and analyzing the whole system.
The remote station assembly 3 comprises an interface module, a motion control module 10, a digital input module, a digital output module, an analog input module and an analog output module. The digital input module receives a control instruction and a system state condition, the digital output module sends the control instruction and feeds back a system state, the analog input module detects the pressure, the position and the like of the system through peripheral equipment, and the analog output module outputs the system to an external system, such as a hydropower station monitoring system.
The double-CPU hot standby redundancy editable controller comprises a CPU1# controller 1 and a CPU2# controller 2 which are connected through an optical fiber. The CPU1# controller 1 is connected to the remote station module 3 through a 1# ethernet, and the CPU2# controller 2 is connected to the remote station module 3 through a 2# ethernet. The remote station assembly 3 is connected to the switch 5 via ethernet. The two intelligent gateways 6 are respectively connected with the switch 5 through Ethernet. The host controller 4 is connected to the switch 5 through an ethernet network. The double-position-loop digital hydraulic servo control assembly comprises six hydraulic control drivers 7, six hydraulic control devices 8 and six displacement transmitters 9. Each hydraulic control device 8 comprises a servo motor, a barrel valve digital cylinder and a barrel valve force receiver. The remote station component 3 and six hydraulic control drivers 7 form a driver POWERLINK real-time bus ring network redundancy through optical fibers. The six hydraulic control drivers 7 are respectively connected with corresponding hydraulic control devices 8 through cables; the six hydraulic control drivers 7 are respectively connected with the corresponding displacement transmitters 9 through cables.
The remote station assembly 3 simultaneously transmits an input signal to the CPU1# controller 1 and the CPU2# controller 2 and simultaneously receives control signals of the CPU1# controller 1 and the CPU2# controller 2. If the CPU1# controller 1 fails, the CPU2# controller 2 takes over the control of the cylindrical valve without disturbance, and if the CPU2# controller 2 fails, the CPU1# controller 1 takes over the control of the cylindrical valve without disturbance. In the event of a fiber failure between the CPU1# controller 1 and the CPU2# controller 2, the remote station assembly 3 may communicate with the CPU1# controller 1 through the # 1 ethernet and with the CPU2# controller 2 through the # 2 ethernet. If the # 1 ethernet communication fails, the remote station module 3 communicates with the CPU # 2 controller 2 through the # 2 ethernet, and the CPU # 1 controller 1 and the CPU # 2 controller 2 perform data exchange through the optical fiber. If the 2# ethernet communication fails, the remote station assembly 3 can communicate with the CPU1# controller 1 through the 1# ethernet, and the CPU1# controller 1 and the CPU2# controller 2 exchange data through the optical fiber.
The CPU1# controller 1 and the CPU2# controller 2 can be connected with the switch 5 through a 3# Ethernet and a 4# Ethernet respectively, and the two intelligent gateways 6 are connected with the switch 5 through the 5# Ethernet and the 6# Ethernet respectively, so that a double-network-segment IEC61850 communication function is realized, and the fault-tolerant capability of external communication of the system is improved.
A hydraulic control driver 7 and a hydraulic control device 8 in the double-position-ring digital hydraulic servo control assembly form a first-layer position ring, and the hydraulic control driver 7, the hydraulic control device 8 and a displacement transmitter 9 form a second-layer position ring. The motion control module 10 in the remote station component 3 transmits the position information, the moment information and the speed information to the hydraulic control driver 7, the hydraulic control driver 7 controls the rotating speed and the direction of a servo motor in the hydraulic control device 8, the servo motor in the hydraulic control device 8 realizes the up-and-down motion of a servomotor through the motion of a cylindrical valve digital cylinder, and the servo motor in the hydraulic control device 8 feeds the moment, the motion speed and the motion position back to the hydraulic control driver 7, so that the first-layer closed-loop control of the cylindrical valve is realized. The displacement transmitter 9 feeds back the actual movement position and speed of the cylindrical valve to the hydraulic control driver 7, and forms a second layer closed loop with the hydraulic control driver 7 and the hydraulic control device 8.
The double-position-ring digital hydraulic servo control assembly can judge the stress condition of the current system through software and measure the current motor torque, current and other information through the internal device of the servo motor. The PLC controller reads and analyzes the data to judge whether the current device is in a normal state so as to make a corresponding strategy in time, and mechanical conditions such as locked rotor jamming and the like are avoided or processed.
The dual position loop digital hydraulic servo control assembly supports direct processing dual encoders. The dual encoder includes a first encoder and a second encoder. The first encoder refers to an encoder inside the servo motor and is used for feeding back the position of the movement of the motor. The second encoder refers to an encoder within the hydraulic servo control assembly for measuring the barrel valve position. At present, the servo driver can directly carry out data communication on the external encoder and the internal encoder in a communication mode, and the servo driver has the capability of processing the two data, so that the data processing is not required to be carried out through a PLC (programmable logic controller), the real-time responsiveness is very high, and the load of a CPU (central processing unit) of a system is reduced.
In conclusion, after the ordinary skilled in the art reads the document of the present invention, the technical solution and technical idea of the present invention do not need creative mental labor and make other various corresponding transformation schemes, which all belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides a large-scale hydraulic turbine cylindric valve digital cylinder control system which characterized in that: the system comprises a double-CPU hot standby redundant controller, a remote station component (3) and a double-position ring digital hydraulic servo control component; the remote station assembly (3) comprises an interface module and a motion control module (10); the dual-CPU hot standby redundancy controller comprises a CPU1# controller (1) and a CPU2# controller (2) which are connected through optical fibers, wherein the CPU1# controller (1) and the CPU2# controller (2) are respectively connected with an interface module of a remote station assembly (3) through Ethernet; the double-position-ring digital hydraulic servo control assembly comprises N hydraulic control drivers (7), N hydraulic control devices (8) and N displacement transmitters (9); a motion control module (10) of the remote station assembly (3) and N hydraulic control drivers (7) form a driver POWERLINK real-time bus ring network redundancy through optical fibers; each hydraulic control driver (7) is respectively connected with a corresponding hydraulic control device (8) through a cable; each hydraulic control driver (7) is respectively connected with the corresponding displacement transmitter (9) through a cable.
2. A large hydraulic turbine barrel valve digital cylinder control system according to claim 1, characterized in that: the intelligent gateway system further comprises an exchanger (5) and two intelligent gateways (6), wherein the two intelligent gateways (6) are respectively connected with the exchanger (5) through the Ethernet; the interface module of the remote station assembly (3) is connected to the switch (5) via an ethernet network.
3. A large hydraulic turbine barrel valve digital cylinder control system according to claim 2, characterized in that: still include host computer controller (4), host computer controller (4) link to each other with switch (5) through ethernet.
4. The large hydraulic turbine barrel valve digital cylinder control system according to claim 1, characterized in that: the remote station assembly (3) further comprises a digital quantity input module, a digital quantity output module, an analog quantity input module and an analog quantity output module.
5. The large hydraulic turbine barrel valve digital cylinder control system according to claim 4, characterized in that: the double-position-ring digital hydraulic servo control assembly comprises six hydraulic control drivers (7), six hydraulic control devices (8) and six displacement transmitters (9).
6. A large hydraulic turbine barrel valve digital cylinder control system according to claim 3 or 5, characterized in that: each hydraulic control device (8) comprises a servo motor, a cylinder valve digital cylinder and a cylinder valve force receiver.
7. A large hydraulic turbine barrel valve digital cylinder control system according to claim 6, characterized in that: the double-position-ring digital hydraulic servo control assembly can support a direct processing double encoder, the double encoder comprises a first encoder and a second encoder, and the first encoder is used for feeding back the movement position of the servo motor; the second encoder is used to measure a barrel valve position.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222496740.1U CN218122483U (en) | 2022-09-21 | 2022-09-21 | Large-scale hydraulic turbine cylindrical valve digital cylinder control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222496740.1U CN218122483U (en) | 2022-09-21 | 2022-09-21 | Large-scale hydraulic turbine cylindrical valve digital cylinder control system |
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| CN218122483U true CN218122483U (en) | 2022-12-23 |
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| CN202222496740.1U Active CN218122483U (en) | 2022-09-21 | 2022-09-21 | Large-scale hydraulic turbine cylindrical valve digital cylinder control system |
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