Valve cooling control system, valve cooling control method, valve cooling control apparatus, and storage medium

Abstract

The present disclosure discloses a valve cooling control system and a control method. The system comprises: a control module, an input module, and a protection module; the input module is used for signal acquisition and output; the protection module is used for tripping protection output; the first control unit is communicatively connected to an operating station by means of a first switch; the first control unit is communicatively connected to the protection module by means of a second switch; the first control unit is communicatively connected to the second control unit; and the first control unit, a first input unit, a second input unit, a third input unit, and the second control unit are sequentially communicatively connected by means of a power link ring network. The embodiments of the present application facilitate improving the operational reliability of a system, and facilitate improving operation efficiency. The present disclosure can be widely applied in the technical field of valve control.

Description

Valve cooling control system, valve cooling control method, valve cooling control device and storage medium

[0001] Cross-reference to related applications

[0002] The present disclosure claims priority to the Chinese patent application No. 2024111296351, filed on August 16, 2024, entitled "Valve cooling control system and control method", the entire content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of valve control, and particularly relates to a valve cooling control system, a valve cooling control method, a valve cooling control device and a storage medium. BACKGROUND

[0004] In recent years, a valve cooling control system is realized through specific mechanical devices to control the flow, flow direction, pressure, temperature and the like of fluid medium. Such a system plays a basic and key role in a pipeline system to ensure effective management and control of fluid. In the related art, if a link in the control process of the valve cooling control system fails, the entire system may stop working, and the reliability of the system needs to be improved. Meanwhile, the control efficiency is low.

[0005] SUMMARY

[0006] The present disclosure provides a valve cooling control system, comprising: a control module, an input module and a protection module; the control module comprises a first control unit and a second control unit, the input module comprises a first input unit, a second input unit and a third input unit; the protection module comprises a first protection unit, a second protection unit and a third protection unit; wherein the input module is configured to collect and output signals; the protection module is configured to output tripping protection; the first control unit is in communication connection with an operation station through a first switch, the second control unit is in communication connection with the operation station through the first switch, and the operation station is configured to input control signals or output target results; the first control unit is in communication connection with the protection module through a second switch, the second control unit is in communication connection with the protection module through the second switch; the first control unit is in communication connection with the second control unit; the first control unit, the first input unit, the second input unit, the third input unit and the second control unit are sequentially in communication connection through a power supply link ring network.

[0007] In one or more embodiments, the first input unit is configured to receive a digital input signal, the second input unit is configured to receive a digital input signal; the control module is configured to determine an out-of-tolerance alarm according to a deviation between the digital input signal received by the first input unit and the digital input signal received by the second input unit; the control module is further configured to perform an operation on the input digital signal to obtain a first operation result; the output end of the first input unit is configured to output the first operation result, and the output end of the second input unit is configured to output the first operation result.

[0008] In one or more embodiments, the output result of the output end of the second input unit is consistent with the output result of the output end of the first input unit.

[0009] In one or more embodiments, the control module is configured to receive a first protection action result of the first protection unit, a second protection action result of the second protection unit, and a third protection action result of the third protection unit; and output a trip decision logic according to two protection action results; the control module is further configured to output the protection action result through the second protection unit and the third protection unit if the first protection unit fails.

[0010] In one or more embodiments, the control module is further configured to output the protection action result through the first protection unit and the third protection unit if the second protection unit fails.

[0011] In one or more embodiments, the control module includes a redundant data synchronization unit configured for data synchronization of the first control unit and the second control unit, wherein the data sent by the first control unit is transmitted to the second control unit through the redundant data synchronization unit.

[0012] In one or more embodiments, the redundant data synchronization unit is configured to determine to perform a user data synchronization operation to realize data synchronization of the first control unit and the second control unit if the first control unit and the second control unit are working and no write output operation is performed.

[0013] In one or more embodiments, the input module and the protection module are configured to control a double-circulation pump, an electric heater, and a cooling fan.

[0014] The disclosure embodiments also propose a valve cooling control method applied to the valve cooling control system described above, and the valve cooling control method includes:

[0015] receiving input signals through the first input unit, the second input unit, and the third input unit;

[0016] determining a protection action result by operating the input signal through the first control unit and the second control unit;

[0017] determining a logic output according to the protection action result.

[0018] In one or more embodiments, the valve cooling control method further comprises achieving redundant data synchronization by the following steps:

[0019] if the first control unit and the second control unit are working and no write output operation is performed, determining to perform a user data synchronization operation; data sent by the first control unit is transmitted to the second control unit through a redundant data synchronization unit.

[0020] In one or more embodiments, the valve cooling control method further comprises controlling a double circulating pump comprising a first main circulating pump and a second main circulating pump by the following steps:

[0021] determining that the first main circulating pump executes power frequency operation for a first duration, and then the second main circulating pump is started up by soft start;

[0022] after a second duration, the soft start contactor and the power frequency contactor of the second main circulating pump are attracted, and the second main circulating pump executes power frequency operation;

[0023] after a third duration, the soft starter of the second main circulating pump exits operation.

[0024] In one or more embodiments, the valve cooling control method further comprises controlling a double circulating pump comprising a first main circulating pump and a second main circulating pump by the following steps: if the outlet water pressure of the first circulating pump is less than or equal to a preset outlet water pressure, switching from the first main circulating pump to the second main circulating pump.

[0025] In one or more embodiments, the valve cooling control method further comprises controlling a double circulating pump comprising a first main circulating pump and a second main circulating pump by the following steps: if the inlet valve pressure of the first main circulating pump is less than or equal to a preset inlet valve pressure, switching from the first main circulating pump to the second main circulating pump.

[0026] In one or more embodiments, the valve cooling control method further comprises controlling a double circulating pump comprising a first main circulating pump and a second main circulating pump by the following steps: if the first main circulating pump fails, switching from the first main circulating pump to the second main circulating pump.

[0027] In one or more embodiments, the valve cooling control method further comprises controlling an electric heater by the following steps:

[0028] If the control temperature is less than or equal to the start temperature of the electric heater and less than or equal to the stop temperature, it is determined that the electric heater is started in a fault-free delay mode;

[0029] If the control temperature is greater than the stop temperature of the electric heater, the electric heater is stopped.

[0030] In one or more embodiments, the above-mentioned valve cooling control method further comprises controlling the electric heater by:

[0031] If the inlet valve temperature is less than or equal to a first temperature and less than or equal to a second temperature, it is determined that the electric heater is started in a fault-free delay mode, wherein the first temperature and the second temperature are related to a dew point.

[0032] If the inlet valve temperature is greater than the stop temperature of the electric heater, the electric heater is stopped.

[0033] In one or more embodiments, the above-mentioned valve cooling control method further comprises controlling the cooling fan by: if the inlet valve temperature is greater than or equal to a first temperature, starting a first group of variable frequency fans; if the inlet valve temperature is a second temperature, determining that the frequency of the first group of variable frequency fans is reduced; if the inlet valve temperature is in a first temperature range, determining that the frequency of the first group of variable frequency fans is maintained; the second temperature is less than the first temperature, and the second temperature is less than any temperature in the first temperature range.

[0034] If the inlet valve temperature is greater than or equal to a third temperature, start a first group of variable frequency fans and a second group of variable frequency fans; the third temperature is greater than the first temperature.

[0035] In one or more embodiments, the above-mentioned valve cooling control method further comprises: if the inlet valve temperature is greater than or equal to a fourth temperature, starting the first group of variable frequency fans, the second group of variable frequency fans and a third group of variable frequency fans, wherein the fourth temperature is greater than the third temperature.

[0036] The embodiments of the present disclosure also provide a valve cooling control device, comprising:

[0037] At least one processor;

[0038] At least one memory for storing at least one program;

[0039] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned valve cooling control method.

[0040] The embodiments of the present disclosure also provide a storage medium having a processor-executable program stored therein, wherein the processor-executable program, when executed by a processor, is used to implement the above-mentioned valve cooling control method. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure or the prior art, the following introduces the drawings of the related technical solutions in the embodiments of the present disclosure or the prior art. It should be understood that the drawings in the following introduction are only for the convenience of clearly describing some of the embodiments of the technical solutions of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0042] Fig. 1 is a structural schematic diagram of a valve cooling control system provided by an embodiment of the present application;

[0043] Fig. 2 is a signal connection relationship schematic diagram of a digital quantity input module provided by an embodiment of the present application;

[0044] Fig. 3 is a signal connection relationship schematic diagram of a digital quantity output module provided by an embodiment of the present application;

[0045] Fig. 4 is a signal connection relationship schematic diagram of an analog quantity input module provided by an embodiment of the present application;

[0046] Fig. 5 is a flowchart of a redundant data synchronization provided by an embodiment of the present application;

[0047] Fig. 6 is a flowchart of a power supply link access provided by an embodiment of the present application;

[0048] Fig. 7 is a flowchart of a Modbus TCP communication provided by an embodiment of the present application;

[0049] Fig. 8 is a flowchart of a double circulating pump control process provided by an embodiment of the present application;

[0050] Fig. 9 is a flowchart of a double circulating pump control process provided by an embodiment of the present application;

[0051] Fig. 10 is a flowchart of a double circulating pump fault switching provided by an embodiment of the present application;

[0052] Fig. 11 is a flowchart of an electric heater control process provided by an embodiment of the present application;

[0053] Fig. 12 is a flowchart of an electric heater control process provided by an embodiment of the present application. DETAILED DESCRIPTION

[0054] Embodiments of the present disclosure are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present disclosure, and cannot be understood as a limitation on the present disclosure. For the step numbers in the following embodiments, they are only set for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0055] In recent years, valve cooling control systems are implemented through specific mechanical devices to control the flow, flow direction, pressure, temperature, etc. of fluid media. Such systems play a fundamental and critical role in pipeline systems, ensuring effective management and control of fluids. In related technologies, the control process of the valve cooling control system may cause the entire system to stop working if a link fails, and the reliability of the system needs to be improved. At the same time, the control efficiency is low.

[0056] The current domestic valve cooling control system mainly uses PLC controllers. The main equipment suppliers of PLC controllers are Siemens, Omron, Rockwell, etc. Through imported products, the cost of system implementation is high.

[0057] The present disclosure aims to at least solve one of the above technical problems in the prior art, and provides a reliable valve cooling control system and valve cooling control method.

[0058] The valve cooling control system and implementation method according to the embodiments of the present disclosure are described in detail below with reference to the drawings. First, a valve cooling control system according to an embodiment of the present disclosure is described with reference to the drawings.

[0059] FIG. 1 is a schematic diagram of the structure of a valve cooling control system according to an embodiment of the present disclosure, which specifically includes:

[0060] a control module, an input module, and a protection module;

[0061] The control module includes a first control unit and a second control unit, the input module includes a first input unit, a second input unit, and a third input unit, and the protection module includes a first protection unit, a second protection unit, and a third protection unit.

[0062] The input module is used for signal acquisition and output, and the protection module is used for tripping protection output.

[0063] The first control unit is in communication connection with the operation station through the first switch, the second control unit is in communication connection with the operation station through the first switch, and the operation station is used for inputting control signals or outputting target results.

[0064] The first control unit is in communication connection with the protection module through the second switch, and the second control unit is in communication connection with the protection module through the second switch; the first control unit is in communication connection with the second control unit.

[0065] The first control unit, the first input unit, the second input unit, the third input unit and the second control unit are in communication connection through the power link ring network in sequence.

[0066] The control module in the embodiment of the application can be controlled by a Beijing and LK226C series redundant PLC.

[0067] The valve cooling control system provided in the embodiment of the application comprises a control module, an input module and a protection module; the control module comprises a first control unit and a second control unit, the input module comprises a first input unit, a second input unit and a third input unit; the protection module comprises a first protection unit, a second protection unit and a third protection unit; wherein the input module is used for signal acquisition and output; the protection module is used for tripping protection output; the first control unit is in communication connection with an operation station through a first switch, the second control unit is in communication connection with the operation station through the first switch, and the operation station is used for inputting a control signal or outputting a target result; the first control unit is in communication connection with the protection module through a second switch, the second control unit is in communication connection with the protection module through the second switch; the first control unit is in communication connection with the second control unit; the first control unit, the first input unit, the second input unit, the third input unit and the second control unit are in communication connection through a power link ring network in sequence. The redundant design of the control module, the input module and the protection module in the embodiment of the application alleviates the problem that any unit failure affects the working reliability of the system, and is conducive to improving the working reliability of the system; meanwhile, the embodiment of the application realizes efficient transmission of data and information through the ring network communication link, and is conducive to improving the working efficiency.

[0068] In some embodiments, the first input end of the first input unit is used for receiving a digital input signal, and the second input end of the second input unit is used for receiving a digital input signal; the control module is used for determining an out-of-tolerance alarm according to the deviation between the digital input signal received by the first input end and the digital input signal received by the second input end; the control module is used for performing operation on the input digital quantity to obtain a first operation result; the output end of the first input unit is used for outputting the first operation result, and the output end of the second input unit is used for outputting the first operation result.

[0069] In some possible embodiments, the output end of the second input unit and the output end of the first input unit output consistent results.

[0070] In some embodiments, the control module is configured to receive the first protection action result of the first protection unit, the second protection action result of the second protection unit, and the third protection action result of the third protection unit, and output a logical output according to two of the protection action results; and the control module is configured to output the protection action results through the second protection unit and the third protection unit if the first protection unit fails.

[0071] In some possible embodiments, the control module is configured to output the protection action results through the first protection unit and the third protection unit if the second protection unit fails. Similarly, if the third protection unit fails, the normal operation of the system is not affected.

[0072] In some embodiments, the control module comprises a redundant data synchronization unit configured to synchronize data of the first control unit and the second control unit, and the data sent by the first control unit is transmitted to the second control unit through the redundant data synchronization unit.

[0073] In some embodiments, the input module and the protection module are configured to control the double-circulation pump (including the first main circulation pump and the second main circulation pump), the electric heater, and the cooling fan.

[0074] Secondly, a valve cooling control method according to an embodiment of the present disclosure will be described with reference to the accompanying drawings.

[0075] The valve cooling control method in the embodiments of the present disclosure can be applied to a terminal, can be applied to a server, and can also be software running in the terminal or the server, etc. The terminal can be a tablet computer, a notebook computer, a desktop computer, etc., but is not limited thereto. The server can be a standalone physical server, can be a server cluster or a distributed system composed of multiple physical servers, or can be a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDNs, and basic cloud computing services such as big data and artificial intelligence platforms. The valve cooling control method in the embodiments of the present disclosure can be applied to the valve cooling control system described above, and mainly comprises the following steps:

[0076] receiving input signals through the first input unit, the second input unit, and the third input unit;

[0077] performing operations on the input signals through the first control unit and the second control unit to determine protection action results;

[0078] determining a logical output according to the protection action results.

[0079] In some embodiments, the valve cooling control method of the present disclosure can further comprise implementing redundant data synchronization through the following steps:

[0080] If the first control unit and the second control unit are in operation and no write-out operation is performed, it is determined to perform a user data synchronization operation; the data sent by the first control unit is transmitted to the second control unit through the redundant data synchronization unit.

[0081] In some embodiments, the valve cold control method of the present disclosure can further include controlling a dual circulating pump including a first main circulating pump and a second main circulating pump by the following steps:

[0082] It is determined that the first main circulating pump performs power frequency operation for a first duration, and the second main circulating pump is started by soft start;

[0083] After a second duration, the soft start contactor and the power frequency contactor of the second main circulating pump are attracted, and the second main circulating pump performs power frequency operation;

[0084] After a third duration, the soft starter of the second main circulating pump exits operation.

[0085] The control method provided by the embodiments of the present application further includes:

[0086] In the maintenance mode, the main circulating pump performs manual start; in the automatic mode, the manual start of the main circulating pump is invalid;

[0087] The main circulating pump receives an on-site automatic start command or a remote automatic start command, and the first main circulating pump performs soft start;

[0088] After a certain duration, the soft start contactor and the power frequency contactor are attracted, and the first main circulating pump performs power frequency operation;

[0089] After a certain duration, the soft starter exits operation;

[0090] Switching process of the dual circulating pump:

[0091] It is determined that the first main circulating pump performs power frequency operation for a first duration, and the second main circulating pump is started by soft start;

[0092] After a second duration, the soft start contactor and the power frequency contactor of the second main circulating pump are attracted, and the second main circulating pump performs power frequency operation;

[0093] After a third duration, the soft starter of the second main circulating pump exits operation.

[0094] The condition for the dual circulating pump to perform the switching process is:

[0095] If the outlet water pressure of the main circulating pump (i.e. the first circulating pump) is less than or equal to the preset outlet water pressure, it is determined to switch from the current main circulating pump to the standby main circulating pump (i.e. the second circulating pump);

[0096] If the inlet valve pressure of the main circulating pump is less than or equal to the preset inlet valve pressure, it is determined to switch from the current main circulating pump to the standby main circulating pump.

[0097] In some embodiments, the valve cooling control method of the present disclosure can further comprise controlling the electric heater by the following steps:

[0098] If the control temperature is less than or equal to the start temperature of the electric heater and less than or equal to the stop temperature, it is determined that the electric heater is started without a fault delay;

[0099] If the control temperature is greater than the stop temperature of the electric heater, the electric heater is stopped.

[0100] In some possible embodiments, the electric heater can also be controlled by the following steps:

[0101] If the inlet valve temperature is less than or equal to the first temperature and less than or equal to the second temperature, it is determined that the electric heater is started without a fault delay; the first temperature and the second temperature are related to the dew point;

[0102] If the inlet valve temperature is greater than the stop temperature of the electric heater, the electric heater is stopped.

[0103] In some embodiments, the valve cooling control method of the present disclosure can further comprise controlling the cooling fan by the following steps:

[0104] If the inlet valve temperature is greater than or equal to the first temperature, the first group of variable frequency fans is started; if the inlet valve temperature is the second temperature, it is determined that the frequency of the first group of variable frequency fans is reduced; if the inlet valve temperature is in the first temperature interval, it is determined that the frequency of the first group of variable frequency fans is maintained; the second temperature is less than the first temperature, and the second temperature is less than any temperature in the first temperature interval;

[0105] If the inlet valve temperature is greater than or equal to the third temperature, the first group of variable frequency fans and the second group of variable frequency fans are started; the third temperature is greater than the first temperature;

[0106] If the inlet valve temperature is greater than or equal to the fourth temperature, the first group of variable frequency fans, the second group of variable frequency fans and the third group of variable frequency fans are started; the fourth temperature is greater than the third temperature.

[0107] It can be seen that the contents in the above system embodiments are all applicable to the method embodiments, the method embodiments specifically realize the same functions as the above system embodiments, and achieve the same beneficial effects as the above system embodiments.

[0108] The control system and control method provided by the present application will be described in detail below with a specific embodiment:

[0109] Referring to FIG. 1, the application is a self-controllable valve cooling control system, which is used for controlling system double redundancy, communication link double redundancy, signal acquisition and output IO double redundancy, and trip protection output triple redundancy. Any module failure in the system does not affect the performance of the valve cooling system. The valve cooling system control part selects Beijing Heli LK226C series redundant PLC, which has the ability to monitor, control and protect the valve cooling system, as well as the functions of early diagnosis, recording and analysis of abnormalities. The redundant controller has a main standby non-disturbance switching function, and the switching process does not affect the signal acquisition, logic operation and driving output of the valve cooling system.

[0110] The redundant control system connects two sets of standard LC optical fiber interfaces through a dedicated optical cable, with a communication rate of 1 Gbps or more, for redundant communication of data. Two link redundancies work, and when one link fails and the other link is fault-free, the fault-free redundant link is switched to, with a switching time of no more than 10 ms, thereby improving the reliability of continuous operation of the system.

[0111] Referring to FIG. 2, all digital input signals of the control system are connected to A / B control system input modules, and two sets of systems are taken from respective digital input modules for operation, and the A and B control systems sample digital input module signals. Among them, the digital input module can meet:

[0112] 11. The control system allows a certain digital input module or channel failure without affecting system operation;

[0113] 12. When the two sets of input module signals deviate, the system can detect module input signal out-of-tolerance alarm;

[0114] 13. The two sets of system input module signals can realize double redundancy function;

[0115] 14. All DI modules can realize hot plug replacement function;

[0116] 15. The two sets of control systems can identify module failure or channel out-of-tolerance and upload fault information.

[0117] Referring to FIG. 3, the control system is provided with two sets of completely independent digital output modules, the currently activated system outputs through CPU operation, and the standby system receives the output of the main system through the communication module between the A / B systems, and the standby system follows the main system to execute control output. The digital output module in the embodiment of the application can meet:

[0118] 21. The control system allows a certain digital output module or channel failure without affecting system operation;

[0119] 22. The main system executes operation output control signal, and the standby system outputs following the communication module;

[0120] 23. All DO modules are hot-swappable.

[0121] 24. Both control systems can identify module faults or channel out-of-tolerance errors and upload fault information.

[0122] Referring to Figure 4, the valve cooling system protection measurement unit is implemented by three sets of protection units. Redundant instruments in the valve cooling system are connected to the three systems respectively. For instruments with triple functionality, they are connected to the three protection units respectively; for instruments with dual functionality, they are connected to systems A and B respectively; and for single instruments, they are connected to protection unit C. The protection units in this embodiment can satisfy:

[0123] 31. A single protection unit can be taken out of service for maintenance.

[0124] 32. Three sets of protection systems are configured with independent CPUs for logic operations;

[0125] 33. Each of the three protection systems outputs its protection action result to the main control unit, which then performs a two-out-of-three protection output.

[0126] 34. If one of the protection systems fails, the other two systems can still output the protection action logic.

[0127] For the system topology shown in Figure 1, the detailed selection and operation are as follows:

[0128] 1. The selection of the main control unit (control system A / B) involves the following aspects:

[0129] 1.1 The main control backplane is selected from the LK132C 6-slot backplane. From left to right, the backplane consists of the power supply slot, the controller slot, and expansion slots 0 to 3. The device address of the controller slot is 1 by default, and the device addresses of the expansion slots are incremented by 1, from 2 to 5 respectively.

[0130] Slot 1.2, 0, houses the LK921C redundant DC power supply module, which converts two 24V DC inputs into a single 24V DC output. The two DC power supplies undergo short-circuit and overvoltage protection via a protection circuit consisting of a slow-blow fuse and a varistor. After interference is eliminated by a filtering circuit, a single 24VDC output is provided. If one input circuit fails, the circuit switches to the other without affecting the output voltage, achieving a safe and reliable redundant power supply mode. Key features include: Input voltage: 19.2~30VDC; Input short-circuit protection; Reverse insertion protection.

[0131] 1.3 Slot 1 is LKC226C, which is the master control unit of the redundant control system, and realizes the fully autonomous hardware and software design. The controller uses 100 / 1000 Mbps dual Ethernet interface to connect the FA-AT programming software. It supports SD card firmware upgrade and can communicate with other devices as master / slave station of Modbus TCP. It supports PRG, REM, RUN three working modes. Basic features: support NTP time setting; support IP automatic scanning; support power-off data saving.

[0132] 1.4 Slot 2 is LK240C redundant data synchronization module, which completes the data synchronization between master and slave controllers, and is connected through optical fiber. LK240C redundantly transmits the data such as user engineering of master controller, IEC running state, controller reset / stop / run / empty operation, forced and write operation to slave controller in real time. When the system is powered on, the master and slave states are determined according to the A, B system engineering state and historical running state. Basic features: determine master-slave mechanism; support gigabit optical fiber communication; support 2-way optical fiber interface.

[0133] 1.5 Slot 3 is LK241C PowerLink master communication module, which interacts with the controller through high-speed backplane bus. The PowerLink master periodically polls the slave station, reads the input data of the slave station, and writes the output data issued by the controller. The PowerLink network supports ring network redundancy mode. Basic features: 2-way PowerLink Ethernet interface; PowerLink master communication protocol; support ring network redundancy mode.

[0134] 1.6 Slot 4 is LK246C Ethernet communication processor module, which provides 2-way 10 / 100 / 1000 Mbps Ethernet port for connecting three sets of protection systems and providing one of the two Modbus TCP communication channels. Basic features: 10 / 100 / 1000 Mbps Ethernet port; support Modbus TCP master / slave station protocol; support 16 master / slave protocols. Each master and slave supports a maximum of 64 connections, and the master protocol supports a maximum of 32 instructions per connection.

[0135] 2. Redundant IO (for controlling electrical equipment signal input / output) involves the following aspects:

[0136] 2.1 LK235C is a PowerLink interface module, which is used as a PowerLink slave station and realizes data forwarding and communication conversion with the above-mentioned LK241C master station. It supports PowerLink slave protocol. It realizes data interaction between the controller and the I / O module through PowerLink Ethernet.

[0137] 2.2 LK616C is a leakage type digital input module, used for valve cooling system discrete signal acquisition, as the input of system logic operation. Basic features: 32 contact leakage input; field power voltage: 19.2VDC~28.8VDC; module field side and system side isolation; field power fault diagnosis; support channel overvoltage protection; support Profibus-DP slave protocol; support hot plug.

[0138] 2.3 LK716C is a source type digital output module, used for valve cooling system discrete signal output, used for driving valve cooling system electrical equipment to realize automatic control. Basic features: 32 channel transistor output; field power voltage: 19.2VDC~28.8VDC; reverse voltage protection; field power fault diagnosis; short circuit protection; channel and system isolation; support failsafe mode output; support hot plug.

[0139] 2.4 LK411C is an 8-channel current type analog input module that can receive field 4~20mA signals. The module provides 8-channel state indication to monitor module operation and fault status. It can diagnose module faults and channel faults, report fault information to the controller when the module fails, and trigger the status indicator light. When the module is working normally, it reports the channel acquisition value in real time. When the module fails, the channel signal remains the last cycle data. Basic features: 8-channel current input; range: 0~20mA / 4~20mA; support four-wire and two-wire instrument with external power supply; broken wire diagnosis; under-range diagnosis; over-range diagnosis; field power fault diagnosis; channel and system isolation; support hot plug.

[0140] 3、Protection system (three sets of protection system, used for three out of two operation to the main control unit, determine the output trip signal) involves the following aspects:

[0141] 3.1 The protection system uses LK221C single controller and LK441C analog input module to form a set of protection system. A total of three sets are set up to collect three redundant instruments of the valve cooling system for operation and determination. When three instruments determine the trip signal, the AND logic is adopted, and when the same type of instrument corresponding to the three sets of protection system is determined as a trip signal, the system outputs a valid trip signal.

[0142] 3.2 The three sets of protection system and control system A / B are provided with two-way Modbus TCP communication, and any abnormal communication will not cause data transmission between the control system and the target protection system. When the two-way communication between the main control system and the protection system is abnormal, the control system automatically switches to the standby control system to maintain normal data interaction.

[0143] Basic features: three sets of protection systems are independent of each other, and any system will not affect the trip decision logic output; Control system and protection system communication dual redundancy, any fault will not cause data interaction exception.

[0144] The valve cooling control method related by the embodiments of the application comprises:

[0145] 41, Redundant data synchronization:

[0146] As shown in the valve cooling system topology diagram of FIG. 1, when the control system is switched redundantly, in order to reduce the disturbance to the valve cooling equipment after switching, the user data should be synchronized during the operation of the master and standby controllers, so as to reduce the jump of the output signal caused by the user data.

[0147] The synchronization data scheme adopted by the autonomous controllable redundant controller is full data area redundancy, which has the advantage that the user does not need to deliberately select the data that needs to be redundant, and all the configuration variables are redundant. For RTS (Request to Send), the technical difficulty of software implementation is relatively small.

[0148] The user data is transmitted from the host to the standby machine, and the controller module of the host rack is responsible for organizing and sending data. The data is transmitted to the LK240 redundant synchronization module through the high-speed backplane bus in the rack, and is forwarded to the optical fiber redundant link through the hardware in the LK240 module. After receiving the data, the LK240 module of the standby rack caches the data. The controller module of the standby rack frequently queries whether the LK240 module caches data, and reads the data if there is data.

[0149] Referring to FIG. 5, the timing of the controller synchronizing user data is after each user program operation ends and before writing output. This prevents the phenomenon of output signal rollback caused by switching during the process of sending redundant data. Therefore, the synchronization data occupies the user task cycle time, and if there is a lot of data that needs to be synchronized, the user task cycle needs to be matched with the synchronization data time consumption. When the programming platform is executed for compilation, the actual length of each data area used is identified, and the RTS synchronizes the data according to the actual length of the data area used, so as to minimize the synchronization data time consumption.

[0150] There are two redundant data tasks in the controller, which realize the function of synchronizing user data. Each user task cycle, after the host user program operation ends, sends redundant data to the standby machine. During the data transmission process, the redundant data task of the standby machine processes, and updates the user data area after the redundant data is received. In order to ensure data consistency, the redundant data task updates the data area while the user program execution is mutually exclusive.

[0151] 42, POWERLINK IO module access

[0152] The autonomous controllable redundant controller expands IO module through POWERLINK connection protocol, the controller is configured with LK241C and IO-A, IO-B, IO-C to form a ring network, as shown in Figure 6. The autonomous controllable redundant control system expands IO to collect digital quantity of valve cooling system and analog quantity signal of instrument, and after software logic processing, the value is transmitted to IO output.

[0153] 43. Control protection separation Modbus TCP communication

[0154] The controller A and the controller B connect three LK221C protection systems through the switch A, and the LK246C configured by the controller connects another network port of the three protection systems through the switch B. Referring to Figure 7, the above two network port communications are separately set as Modbus TCP. The same data register is exchanged with the upper end redundant controller to form a redundant communication link. When one of the Modbus TCP communications is abnormal, the other Modbus TCP communication link is automatically switched.

[0155] The main equipment control logic involved in the embodiments of the application is as follows.

[0156] 51. Double circulating pump (P01 / P02)

[0157] The main circulating pump can execute manual start and automatic start. The manual start is only applicable to the maintenance mode, and the manual mode start of the main pump is invalid when the automatic mode is running. The main circulating pump in the automatic mode can accept local automatic control and remote automatic control functions, and the remote control can be stopped when the local automatic control is performed. The remote automatic control can not be stopped when the local automatic control is performed. The valve cooling system without remote control does not execute this requirement. The valve cooling system is generally configured with a soft starter control, and the soft starter is only used for start control. After the start is completed, the soft starter should be switched to bypass frequency operation.

[0158] When the main circulating pump executes automatic start, the main circulating pump first executes soft start, the soft starter outputs the frequency bypass contact after 5 seconds, so that the main circulating pump switches to frequency operation, and the soft starter remains output at this time. The soft start and the frequency two contactors are attracted at the same time, and the frequency contactor is attracted for 5 seconds and then the soft starter is exited, so as to realize seamless connection of soft start to frequency. If the soft starter fails to start, the main circulating pump is forced to operate in frequency after 5 seconds of executing the automatic start command. The control process is shown in Figure 8.

[0159] For the automatic switching mode of the two main circulating pumps:

[0160] Referring to FIG. 9, after the P01 main pump continuously operates without failure for 168 hours, the main circulating pump automatic switching logic is started, the P02 main pump is put into operation while the P01 main pump is stopped. (Taking the P01 main pump operation as an example, the main circulating pump operation time of 168 hours can be set on the operation panel).

[0161] Valve cooling system circulating pump fault switching control mode:

[0162] When the valve cooling system has the following faults, the system automatically switches to the standby main pump operation while the current pump stops when the current main circulating pump is operating. Referring to FIG. 10, the fault conditions include:

[0163] Main pump outlet pressure low alarm: When the detection value of the outlet pressure transmitter of any one main pump is less than or equal to the low pressure protection set value, the control system reports a "main pump outlet pressure low" alarm after a 3-second delay.

[0164] Inlet valve pressure low alarm: When the detection value of the inlet valve pressure transmitter of any one main pump is less than or equal to the low pressure protection set value, the control system reports an "inlet valve pressure low" alarm after a 3-second delay.

[0165] Main circulating pump fault alarm: When the main circulating pump power circuit breaker trips or the thermal relay acts, the control system reports a "main circulating pump fault" alarm after a 500-millisecond delay.

[0166] Device power failure fault alarm switching main pump function is only applicable to two-way AC power supply system, and the two ways supply power to two main circulating pumps, that is, the I section AC power supply supplies power to the P01 main pump, and the II section AC power supply supplies power to the P02 main pump. When the main pump in operation has a power failure, the control system reports the corresponding AC power failure to switch the main pump after a 500-millisecond delay. For the system using double power supply to supply power to the main pump, when a single AC power supply fails, the AC power supply is switched first, and the original main pump continues to operate after the AC power supply is switched.

[0167] Main circulating pump control circuit breaker tripping: Each main circulating pump is provided with two control circuit breakers, and when both control circuit breakers of the main circulating pump in operation trip, the main circulating pump performs fault switching.

[0168] 52, electric heater

[0169] Referring to the temperature control start-stop process shown in FIG. 11:

[0170] When the control temperature is less than or equal to the electric heater start temperature and also less than or equal to the stop temperature, the electric heater starts without failure after a 2-second delay.

[0171] When the control temperature is greater than the electric heater stop temperature, the electric heater stops.

[0172] Refer to the dew point control start-stop process shown in Figure 12:

[0173] When the inlet valve temperature is less than or equal to the dew point + 1℃, and also less than or equal to the dew point + 4℃, delay 2 seconds and start the electric heater without failure.

[0174] When the inlet valve temperature is greater than the electric heater stop temperature, the electric heater stops.

[0175] 53, cooling fan

[0176] When the number of cooling fans is large, take the Xiangjie expansion converter station fan number as an example, of which 27 are frequency conversion control and 81 are power frequency control. The external cooling fan should start the frequency conversion fan control first, and then start the power frequency fan when the frequency conversion fan heat dissipation is not enough.

[0177] The frequency conversion fan is divided into three groups, with starting temperatures of 32℃, 33℃, and 34℃. The starting temperature can be set on the operation panel, and the target temperature of the frequency conversion fan is -1.5℃, which can be set on the operation panel. The three groups of frequency conversion fans use the first start and stop, and the cycle start-stop control mode.

[0178] The frequency conversion fan is divided into three groups, with starting temperatures of 32℃, 33℃, and 34℃. The starting temperature can be set on the operation panel, and the target temperature of the frequency conversion fan is -1.5℃, which can be set on the operation panel. The three groups of frequency conversion fans use the first start and stop, and the cycle start-stop control mode.

[0179] The power frequency fan is divided into three groups, with starting temperatures of 35℃, 37℃, and 39℃. The starting temperature can be set on the operation panel, and the power frequency fan stop temperature is 2℃ lower than the starting temperature. The power frequency fan temperature gradient can be set.

[0180] The frequency conversion fan is divided into three groups, with starting temperatures of 32℃, 33℃, and 34℃. The power frequency fan is divided into three groups, with 27 fans in each group, and the starting temperatures are 35℃, 37℃, and 39℃, respectively.

[0181] The target temperature value should be set on the operation panel.

[0182] Frequency conversion fan control mode:

[0183] When the inlet valve temperature is greater than or equal to 32℃, start the first group of frequency conversion fans, and the target temperature control is -1.5℃. When the inlet valve temperature reaches 32℃, the first group of frequency conversion fans starts. When the inlet valve temperature drops to 30.5℃, the frequency of the first group of frequency conversion fans starts to drop. When the inlet valve temperature is in the range of 30.6-31.4℃, it is the frequency control dead zone, and the frequency of the frequency converter remains unchanged. Only one group of frequency conversion fans is started to execute the cycle start-stop logic.

[0184] When the inlet valve temperature is greater than or equal to 33 DEG C, the first and second groups of variable frequency fans are started, and the target temperature is controlled to be -1.5 DEG C. When the inlet valve temperature reaches 33 DEG C, the first and second groups of variable frequency fans are started. When the inlet valve temperature drops to 31.5 DEG C, the frequency of the nine variable frequency fans starts to decrease. When the inlet valve temperature is in the range of 31.6 DEG C to 32.4 DEG C, it is a dead zone, and the frequency of the variable frequency fans remains unchanged. The two groups of fans start to execute the cycle start-stop logic.

[0185] When the inlet valve temperature is greater than or equal to 34 DEG C, the first, second and third groups of variable frequency fans are started, and the target temperature is controlled to be -1.5 DEG C. When the inlet valve temperature drops to 32.5 DEG C, the frequency of the first, second and third groups of variable frequency fans starts to decrease. When the inlet valve temperature is in the range of 32.6 DEG C to 33.4 DEG C, it is a control dead zone, and the frequency of the variable frequency fans remains unchanged.

[0186] The embodiment of the present disclosure further provides a valve cooling control device, which comprises:

[0187] at least one processor;

[0188] at least one memory for storing at least one program;

[0189] When the at least one program is executed by the at least one processor, the at least one processor implements the valve cooling control method.

[0190] Similarly, the contents in the above method embodiments are all applicable to the device embodiments, the device embodiments specifically implement the functions of the above method embodiments, and achieve the same beneficial effects as the above method embodiments.

[0191] The embodiment of the present disclosure further provides a computer readable storage medium, wherein a program executable by a processor is stored, and the program executable by the processor is used for executing the valve cooling control method when executed by the processor.

[0192] Similarly, the contents in the above method embodiments are all applicable to the storage medium embodiments, the storage medium embodiments specifically implement the functions of the above method embodiments, and achieve the same beneficial effects as the above method embodiments.

[0193] In some alternative embodiments, the function / operations mentioned in the block diagrams can not occur in the order mentioned in the operational illustrations. For example, depending on the involved function / operation, two blocks shown in succession can in fact be executed substantially concurrently or the blocks can sometimes be executed in reverse order, depending upon the functionality / operations involved. Further, embodiments presented and described in the flowcharts of the disclosure are only examples of implementations. The steps presented and / or described in the flowcharts are not necessarily to be construed as requiring their respective order for implementation. Alternative embodiments can be conceived in which the order of the steps is changed and / or in which sub-steps of a described larger step are performed in a different order or in parallel. Alternative embodiments are also contemplated in which one or more of the described functions and / or features are integrated in a single physical device and / or software module or one or more functions and / or features are implemented in separate physical devices or software modules.

[0194] Further, while the present disclosure has been described in the context of functional modules, it is to be understood that one or more of the functions and / or features can be integrated in a single physical device and / or software module or one or more functions and / or features can be implemented in separate physical devices or software modules unless otherwise specified. It is also to be understood that detailed discussion of the actual implementation of each module is unnecessary to an understanding of the present disclosure. Rather, the actual implementation is within the routine of an engineer in light of the nature of the various functional modules disclosed herein, their properties, and internal relationships. Accordingly, the present disclosure is not limited to purely software implementations, but encompasses firmware, hardware, and hybrid implementations within its scope. It is also to be understood that the disclosed specific concepts are merely illustrative and not intended to limit the scope of the present disclosure, which is defined by the full scope of the appended claims and equivalents thereof.

[0195] If the functions are implemented in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present disclosure can be embodied in the form of a software product, and the computer software product is stored in a storage medium, and includes a plurality of programs for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0196] The logic and / or steps represented in the flow diagrams or otherwise described herein, for example, can be embodied in non-transitory computer-readable media, executed by a program executing system, apparatus, or device, such as a computer-based system, a processor-based system, or other system that can fetch the instructions from the instructions execution system, apparatus, or device and execute the instructions, or in conjunction with which the instructions can be executed. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport the program for use by or in connection with the program execution system, apparatus, or device.

[0197] More specific examples (a non-exhaustive list) of the computer-readable medium include the following: an electrical connection (electronic) having one or more wires, a portable computer diskette (magnetic), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium can also be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, for example, via optical scanning of the paper or other medium, then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

[0198] It should be understood that aspects of the present disclosure can be implemented in hardware, software, firmware or combinations thereof. In the above-described embodiments, multiple steps or methods can be implemented in software or firmware stored in a memory and executed by a suitable program executing system. For example, if implemented in hardware, and as in another embodiment, any of the following technologies known in the art, or combinations thereof, can be used: discrete logic circuitry having logic gates for implementing logic functions on data signals, application specific integrated circuits having appropriate combinational logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and the like.

[0199] In the above-described description of the present specification, the description referring to the terms "one embodiment / one example", "another embodiment / another example" or "certain embodiments / certain examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present specification, the illustrative expressions of the above-described terms do not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in an appropriate manner.

[0200] Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

[0201] The above is a specific description of the preferred embodiments of the present disclosure, but the present disclosure is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present disclosure, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present disclosure. Industrial applicability

[0202] The valve cooling control system provided by the present disclosure comprises a control module, an input module and a protection module; the control module comprises a first control unit and a second control unit, the input module comprises a first input unit, a second input unit and a third input unit; the protection module comprises a first protection unit, a second protection unit and a third protection unit; wherein the input module is used for signal acquisition and output; the protection module is used for tripping protection output; the first control unit is in communication connection with an operation station through a first switch, the second control unit is in communication connection with the operation station through the first switch, and the operation station is used for inputting control signals or outputting target results; the first control unit is in communication connection with the protection module through a second switch, the second control unit is in communication connection with the protection module through the second switch; the first control unit is in communication connection with the second control unit; the first control unit, the first input unit, the second input unit, the third input unit and the second control unit are sequentially in communication connection through a power supply link ring network. The redundant design of the control module, the input module and the protection module in the embodiment of the present application alleviates the problem that any unit failure affects the working reliability of the system, and is conducive to improving the working reliability of the system; at the same time, the embodiment of the present application realizes efficient transmission of data and information through the ring network communication link, which is conducive to improving the working efficiency.

[0203] The valve cooling control method provided by the present disclosure is applied to the valve cooling control system described above, and can realize the same beneficial technical effects as the valve cooling control system.

Claims

1. A valve cooling control system, comprising: The control module, the input module and the protection module, The control module includes a first control unit and a second control unit, the input module includes a first input unit, a second input unit and a third input unit, and the protection module includes a first protection unit, a second protection unit and a third protection unit. The input module is configured to collect and output signals, and the protection module is configured to output tripping protection. The first control unit is connected to an operation station through a first switch, the second control unit is connected to the operation station through the first switch, and the operation station is configured to input control signals or output target results. The first control unit is connected to the protection module through a second switch, the second control unit is connected to the protection module through the second switch, and the first control unit is connected to the second control unit. The first control unit, the first input unit, the second input unit, the third input unit and the second control unit are sequentially connected through a power supply link ring network.

2. The valve cooling control system of claim 1, wherein, The first input unit is configured to receive digital input signals, the second input unit is configured to receive digital input signals, the control module is configured to determine an out-of-tolerance alarm according to the deviation between the digital input signals received by the first input unit and the digital input signals received by the second input unit, the control module is further configured to operate the input digital quantity to obtain a first operation result, the output end of the first input unit is configured to output the first operation result, and the output end of the second input unit is configured to output the first operation result.

3. The valve cooling control system of claim 2, wherein, The output results of the output end of the second input unit and the output end of the first input unit are consistent.

4. The valve cooling control system of any one of claims 1-3, wherein, The control module is configured to receive first protection action results of the first protection unit, second protection action results of the second protection unit and third protection action results of the third protection unit. And output tripping judgment logic according to two protection action results. The control module is further configured to output protection action results through the second protection unit and the third protection unit if the first protection unit fails.

5. The valve cooling control system of claim 4, wherein, The control module is further configured to output protection action results through the first protection unit and the third protection unit if the second protection unit fails.

6. The valve cooling control system of any one of claims 1-5, wherein, The control module includes a redundant data synchronization unit configured to synchronize data of the first control unit and the second control unit, wherein the data sent by the first control unit is transmitted to the second control unit through the redundant data synchronization unit.

7. The valve cooling control system of claim 6, wherein, The redundant data synchronization unit is configured to determine to perform a user data synchronization operation to realize data synchronization of the first control unit and the second control unit if the first control unit and the second control unit are working and no write output operation is performed.

8. The valve cooling control system of any one of claims 1-7, wherein, The input module and the protection module are configured to control a double-circulation pump, an electric heater and a cooling fan.

9. A valve cooling control method applied to the valve cooling control system according to any one of claims 1-8, wherein the valve cooling control method comprises: receiving input signals through the first input unit, the second input unit and the third input unit; operating the input signals through the first control unit and the second control unit to determine a protection action result; determining a logic output according to the protection action result.

10. The valve cooling control method according to claim 9, further comprising realizing redundant data synchronization through the following steps: if the first control unit and the second control unit are working and no write output operation is performed, determining to perform a user data synchronization operation; data sent by the first control unit is transmitted to the second control unit through a redundant data synchronization unit.

11. The valve cooling control method according to claim 9 or 10, further comprising controlling the double circulating pumps including the first main circulating pump and the second main circulating pump through the following steps: determining that the first main circulating pump performs power frequency operation for a first time length, and then the second main circulating pump is started up by soft start; after a second time length, the soft start contactor and the power frequency contactor of the second main circulating pump are attracted, and the second main circulating pump performs power frequency operation; after a third time length, the soft starter of the second main circulating pump exits operation.

12. The valve cooling control method according to any one of claims 9-11, further comprising controlling the double circulating pumps including the first main circulating pump and the second main circulating pump through the following steps: if the outlet water pressure of the first circulating pump is less than or equal to a preset outlet water pressure, switching from the first main circulating pump to the second main circulating pump.

13. The valve cooling control method according to any one of claims 9-12, further comprising controlling the double circulating pumps including the first main circulating pump and the second main circulating pump through the following steps: if the inlet valve pressure of the first main circulating pump is less than or equal to a preset inlet valve pressure, switching from the first main circulating pump to the second main circulating pump.

14. The valve cooling control method according to any one of claims 9-13, further comprising controlling the double circulating pumps including the first main circulating pump and the second main circulating pump through the following steps: if the first main circulating pump fails, switching from the first main circulating pump to the second main circulating pump.

15. The valve cooling control method according to any one of claims 9-14, further comprising controlling the electric heater through the following steps: if the control temperature is less than or equal to the start temperature of the electric heater and less than or equal to the stop temperature, determining that the electric heater is started up without failure in a delay mode; if the control temperature is greater than the stop temperature of the electric heater, stopping the electric heater.

16. The valve cooling control method according to any one of claims 9-15, further comprising controlling the electric heater through the following steps: if the inlet valve temperature is less than or equal to the first temperature and less than or equal to the second temperature, determining that the electric heater is faultlessly delayed to start, wherein, the first temperature and the second temperature are related to a dew point; if the inlet valve temperature is greater than the stop temperature of the electric heater, stopping the electric heater.

17. The valve cooling control method of any one of claims 9-16, further comprising controlling the cooling fan by: starting a first set of variable frequency fans if an inlet valve temperature is greater than or equal to a first temperature; determining a frequency of the first set of variable frequency fans to decrease if the inlet valve temperature is a second temperature; and determining the frequency of the first set of variable frequency fans to remain unchanged if the inlet valve temperature is in a first temperature range, wherein, the second temperature is less than the first temperature, and the second temperature is less than any temperature in the first temperature interval; the second temperature is less than the first temperature, and the second temperature is less than any temperature in the first temperature interval. if the inlet valve temperature is greater than or equal to a third temperature, starting the first group of variable frequency fans and the second group of variable frequency fans, wherein the third temperature is greater than the first temperature. 18.The valve cooling control method of claim 17, further comprising: if the inlet valve temperature is greater than or equal to a fourth temperature, starting the first group of variable frequency fans, the second group of variable frequency fans, and a third group of variable frequency fans, wherein the fourth temperature is greater than the third temperature. 19.A valve cooling control apparatus comprising: at least one processor; at least one memory storing at least one program; the at least one program, when executed by the at least one processor, causing the at least one processor to implement the valve cooling control method according to any one of claims 9-18.

20. A storage medium storing a program executable by a processor, wherein, the program executable by the processor for implementing the valve cooling control method according to any one of claims 9-18 when executed by the processor.

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