Control method and device of air cooler fan unit of converter valve cooling system and medium

Abstract

The invention discloses a control method and device for an air cooler fan set of a converter valve cooling system and a medium, and relates to the field of flexible direct current transmission, and the method comprises the steps: obtaining the water outlet temperature of air cooler cooling water and the valve inlet temperature of valve set cooling water; if the out-of-tolerance of the outlet water temperature and the inlet valve temperature is larger than or equal to the preset value, the maximum value of the outlet water temperature and the inlet valve temperature serves as the control temperature; if the out-of-tolerance of the outlet water temperature and the inlet valve temperature is smaller than a preset value and all the outlet water temperature transmitters fail, the inlet valve temperature serves as the control temperature, and if at least one outlet water temperature deformer does not fail, the outlet water temperature serves as the control temperature; and starting, stopping and frequency of fans in the air cooler fan set are controlled according to the control temperature. The out-of-tolerance of the outlet water temperature and the inlet valve temperature is larger than or equal to the preset value, the maximum value of the outlet water temperature and the inlet valve temperature serves as the control temperature, the tripping situation caused by the fact that a draught fan cannot be started in time and the inlet valve temperature is continuously increased is avoided, and the running reliability of the direct-current system is improved.

Description

Technical Field

[0001] The present application relates to the field of flexible direct current power transmission, and in particular to a control method, device and medium for an air cooler fan unit of a converter valve cooling system. Background Art

[0002] With the concept of global energy internet proposed, there is a growing call for the grid connection of renewable energy such as wind and solar power. However, the intermittent and uncertain nature of these renewable energy sources makes it impossible for traditional AC power grids to absorb them normally. Flexible DC transmission technology can flexibly control active and reactive power and supply power to weak AC systems. It has become the best choice for grid connection of new energy power generation and long-distance transmission.

[0003] There are many DC devices in the flexible high-voltage converter station and the cost is higher than that of traditional DC transmission. Among them, the converter valve is the core equipment, and there are extremely high requirements for the working speed and accuracy of the converter valve. At the same time, the converter valve undertakes a lot of work and is composed of a large number of sub-modules. Therefore, there are extremely high requirements for the control and protection of the converter valve. The valve cooling system is an important auxiliary equipment system of the converter station. The heat generated by the thyristor converter valve due to power consumption is taken away by the flow of cooling medium to ensure the stable operation of the thyristor converter valve, the core equipment of the converter station. As an important part of the converter station, the performance of the valve cooling system directly determines the safety of the DC system and must be given sufficient attention.

[0004] The heat exchange equipment in the converter valve cooling system is an air cooler, and the air cooler fan adopts a large group variable frequency fan + a large group industrial frequency fan. The three-way valve opening of the valve cooling system is controlled according to the inlet valve temperature, and the start and stop of the air cooler fan is controlled according to the return water temperature of the air cooler or the inlet valve temperature; under normal circumstances, when the inlet valve temperature is greater than 25°C, the three-way valve is fully opened, and the internal cooling water all flows through the external cooling pipeline. When the inlet valve temperature is greater than 28°C, the air cooler fan is started. If the sampling value of the inlet valve temperature sensor and the external cooling return water temperature sensor has a large deviation, and the inlet valve temperature does not reach 28°C, the fan will not start in time, the inlet valve temperature will continue to increase, and then the inlet valve temperature is too high, resulting in tripping, affecting the reliability of the DC system.

[0005] Therefore, how to improve the timeliness of air cooler fan control, avoid continuous increase in inlet valve temperature, and improve the reliability of DC system operation are problems that technical personnel in this field need to solve. Summary of the invention

[0006] The purpose of the present application is to provide a control method, device and medium for a fan unit of an air cooler in a converter valve cooling system, which is used to solve the problem that controlling the fan according to the inlet valve temperature may lead to untimely start-up of the fan.

[0007] In order to solve the above technical problems, the present application provides a control method for an air cooler fan unit of a converter valve cooling system, comprising:

[0008] Obtain the outlet water temperature of the air cooler cooling water and the inlet valve temperature of the valve group cooling water;

[0009] If the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, the maximum value of the outlet water temperature and the inlet valve temperature is used as the control temperature;

[0010] If the excess difference between the outlet water temperature and the inlet valve temperature is less than the preset value, it is determined whether the outlet water temperature transmitter of the air cooler is faulty;

[0011] If all of the outlet water temperature transmitters are faulty, the inlet valve temperature is used as the control temperature; if at least one of the outlet water temperature transformers is not faulty, the outlet water temperature is used as the control temperature;

[0012] The start and stop and frequency of the fans in the air cooler fan group are controlled according to the control temperature.

[0013] In a feasible embodiment, the air cooler fan group includes multiple groups of variable frequency fan groups and multiple groups of industrial frequency fan groups, and the fans in the air cooler fan group are controlled to start and stop according to the control temperature, including:

[0014] If the control temperature is higher than or equal to the variable frequency fan start-up temperature, determine the first variable frequency fan group number corresponding to the variable frequency fan start-up temperature, and start the variable frequency fan group based on the first variable frequency fan group number;

[0015] After the variable frequency fan group is turned on based on the first variable frequency fan group number, if the control temperature is lower than the variable frequency fan start-up temperature, and the difference between the variable frequency fan start-up temperature and the control temperature is greater than or equal to a first preset value, the turned-on variable frequency fan group is stopped;

[0016] If the control temperature is higher than or equal to the power frequency fan starting temperature, determine the second variable frequency fan group number and the power frequency fan group number corresponding to the power frequency fan starting temperature, and start the variable frequency fan group and the power frequency fan group based on the second variable frequency fan group number and the power frequency fan group number; wherein the power frequency fan starting temperature is greater than the variable frequency fan starting temperature;

[0017] After the variable frequency fan group and the industrial frequency fan group are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is lower than the industrial frequency fan start-up temperature, and the difference between the industrial frequency fan start-up temperature and the control temperature is greater than or equal to a second preset value, the turned on industrial frequency fan group is stopped; wherein the second preset value is greater than the first preset value.

[0018] In a feasible embodiment, controlling the fan frequency in the air cooler fan unit according to the control temperature includes:

[0019] After the variable frequency fan group is turned on based on the first variable frequency fan group number, if the control temperature is lower than the variable frequency fan start-up temperature, and the difference between the variable frequency fan start-up temperature and the control temperature is less than a first preset value, reducing the fan frequency of the turned-on variable frequency fan group;

[0020] After the fan frequency is reduced to the minimum operating frequency, if the control temperature is still lower than the variable frequency fan start-up temperature, the turned-on variable frequency fan unit is controlled to run at the minimum operating frequency for a preset time and then stop running;

[0021] After the variable frequency fan groups are turned on based on the first number of variable frequency fan groups, if the control temperature is higher than the variable frequency fan start-up temperature, the fan frequency of the turned-on variable frequency fan groups is increased.

[0022] In a feasible embodiment, controlling the fan frequency in the air cooler fan unit according to the control temperature includes:

[0023] After the variable frequency fan group and the industrial frequency fan group are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is lower than the industrial frequency fan start-up temperature, and the difference between the industrial frequency fan start-up temperature and the control temperature is less than a second preset value, the fan frequency of the turned-on variable frequency fan group is reduced;

[0024] After the fan frequency is reduced to the minimum operating frequency, if the control temperature is still lower than the industrial frequency fan start-up temperature, the turned-on variable frequency fan unit is controlled to run at the minimum operating frequency for a preset period of time and then the turned-on industrial frequency fan unit is stopped;

[0025] After the variable frequency fan groups and the industrial frequency fan groups are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is higher than the industrial frequency fan start-up temperature, the fan frequency of the turned-on variable frequency fan groups is increased.

[0026] In a feasible embodiment, each variable frequency fan group includes a plurality of variable frequency fans, and each industrial frequency fan group includes a plurality of industrial frequency fans. Controlling the start and stop of the variable frequency fans and the industrial frequency fans includes:

[0027] Start multiple variable frequency fans in sequence at set intervals, and after all variable frequency fans are started, start multiple industrial frequency fans in sequence at set intervals;

[0028] Multiple industrial frequency fans are stopped in sequence at set intervals, and after all industrial frequency fans are stopped, multiple variable frequency fans are stopped in sequence at set intervals.

[0029] In a feasible embodiment, the outlet water temperature transmitter is configured with dual redundancy, and if at least one of the outlet water temperature transformers is not faulty, the outlet water temperature is used as the control temperature, including:

[0030] If both of the two outlet water temperature transmitters are not faulty, the maximum value of the two outlet water temperatures detected by the two outlet water temperature transmitters is used as the control temperature;

[0031] If one of the outlet water temperature transmitters is not faulty, the outlet water temperature detected by the outlet water temperature transmitter that is not faulty is used as the control temperature.

[0032] In a feasible embodiment, the inlet valve temperature transmitter at the valve group is a triple redundant configuration, and the inlet valve temperature is used as the control temperature, including:

[0033] If the three inlet valve temperature transmitters are all normal, the minimum value of the three inlet valve temperatures detected by the three inlet valve temperature transmitters is deleted, and the average value of the remaining two inlet valve temperatures is used as the control temperature;

[0034] If both of the two inlet valve temperature transmitters are normal, the maximum value of the two inlet valve temperatures detected by the two inlet valve temperature transmitters is used as the control temperature;

[0035] If one of the inlet valve temperature transmitters is not faulty, the inlet valve temperature detected by the inlet valve temperature transmitter that is not faulty is used as the control temperature.

[0036] The present application also provides a control device for an air cooler fan unit of a converter valve cooling system, comprising:

[0037] An acquisition module is used to obtain the outlet water temperature of the cooling water of the air cooler and the inlet valve temperature of the cooling water of the valve group;

[0038] A first determination module, configured to use the maximum value of the water outlet temperature and the valve inlet temperature as the control temperature if the excess difference between the water outlet temperature and the valve inlet temperature is greater than or equal to a preset value;

[0039] A judgment module, used for judging whether the outlet water temperature transmitter of the air cooler is faulty if the excess difference between the outlet water temperature and the inlet valve temperature is less than the preset value;

[0040] A second determination module is used to use the inlet valve temperature as the control temperature if all of the outlet water temperature transmitters are faulty, and use the outlet water temperature as the control temperature if at least one of the outlet water temperature transformers is not faulty;

[0041] The control module is used to control the start and stop and frequency of the fans in the air cooler fan group according to the control temperature.

[0042] The present application also provides a control device for an air cooler fan unit of a converter valve cooling system, comprising a memory for storing a computer program;

[0043] A processor is used to implement the steps of the control method of the air cooler fan group of the converter valve cooling system when executing the computer program.

[0044] The present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the control method of the air cooler fan unit of the converter valve cooling system are implemented.

[0045] The present application provides a control method for an air cooler fan unit of a converter valve cooling system, including: obtaining the outlet water temperature of the air cooler cooling water and the inlet valve temperature of the valve unit cooling water; if the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, taking the maximum value of the outlet water temperature and the inlet valve temperature as the control temperature; if the difference between the outlet water temperature and the inlet valve temperature is less than a preset value, judging whether the outlet water temperature transmitter of the air cooler is faulty; if all the outlet water temperature transmitters are faulty, taking the inlet valve temperature as the control temperature, and if at least one outlet water temperature transformer is not faulty, taking the outlet water temperature as the control temperature; controlling the start and stop and frequency of the fan in the air cooler fan unit according to the control temperature. When the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, taking the maximum value of the outlet water temperature and the inlet valve temperature as the control temperature, avoiding the situation where the fan cannot be started in time and the inlet valve temperature continues to increase, causing tripping, thereby improving the reliability of the DC system operation. In addition, when the difference between the outlet water temperature and the inlet valve temperature is less than the preset value and the outlet water temperature transmitters are faulty, the inlet valve temperature can be used as the control temperature, avoiding the limitation of only using the outlet water temperature as the control temperature for fan control, and further improving the reliability of the DC system operation.

[0046] The beneficial effects and methods of the control device and medium of the air cooler fan unit of the converter valve cooling system provided in the present application correspond to the effects as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0048] FIG1 is a flow chart of a control method for a fan unit of an air cooler in a converter valve cooling system according to an embodiment of the present application;

[0049] FIG2 is a structural diagram of a control system of an air cooler fan unit of a converter valve cooling system provided by the present application;

[0050] FIG3 is a structural diagram of a control system of another air cooler fan unit of a converter valve cooling system provided by the present application;

[0051] FIG4 is a structural diagram of a valve cooling system provided by the present application;

[0052] FIG5 is a structural diagram of a control device for an air cooler fan unit of a converter valve cooling system provided in an embodiment of the present application;

[0053] FIG6 is a structural diagram of another control device for an air cooler fan unit of a converter valve cooling system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] The core of this application is to provide a control method, device and medium for an air cooler fan group of a converter valve cooling system, which is used to improve the timeliness of air cooler fan control, avoid continuous increase in inlet valve temperature, and improve the reliability of DC system operation.

[0056] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0057] FIG1 is a flow chart of a control method for a fan unit of an air cooler in a converter valve cooling system provided by an embodiment of the present application. As shown in FIG1 , the control method for a fan unit of an air cooler in a converter valve cooling system includes:

[0058] S10: Obtaining the outlet water temperature of the air cooler cooling water and the inlet valve temperature of the valve group cooling water.

[0059] S11: If the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, the maximum value of the outlet water temperature and the inlet valve temperature is used as the control temperature.

[0060] S12: If the difference between the outlet water temperature and the inlet valve temperature is less than the preset value, determine whether the outlet water temperature transmitter of the air cooler is faulty.

[0061] S13: If all the outlet water temperature transmitters are faulty, the inlet valve temperature is used as the control temperature. If at least one outlet water temperature transformer is not faulty, the outlet water temperature is used as the control temperature.

[0062] S14: Control the start and stop and frequency of the fans in the air cooler fan unit according to the control temperature.

[0063] In step S11, the deviation calculation formula is (AB) / A, where A is the larger value of the inlet valve temperature and the outlet water temperature, and B is the smaller value of the inlet valve temperature and the outlet water temperature. The preset value can be set to 20%. When the deviation between the outlet water temperature and the inlet valve temperature is detected to be greater than or equal to 20%, an alarm prompt is issued, and the alarm prompt can be delayed for 60 seconds. The alarm after a delay of 60 seconds is to prevent the occurrence of false alarms.

[0064] In step S12, the present application embodiment does not specifically limit how to determine whether the outlet water temperature transmitter is faulty. A multimeter can be used to measure the output current or voltage of the outlet water temperature transmitter and compare it with the theoretical value to determine whether the output signal is normal.

[0065] In step S13, if at least one water outlet temperature transformer is not faulty, the water outlet temperature is used as the control temperature. Specifically, if one water outlet temperature transmitter is normal, the water outlet temperature detected by the water outlet temperature transmitter is used as the control temperature; if multiple water outlet temperature transmitters are normal, the average of multiple water outlet temperatures detected by the multiple water outlet temperature transmitters is used as the control temperature, or the maximum value of the multiple water outlet temperatures can be used as the control temperature.

[0066] In step 14, the start and stop and frequency of the fans in the air cooler fan group are controlled according to the control temperature. A certain number of fans can be turned on or off according to the control temperature, and the frequency of the turned-on fans can be controlled, thereby achieving control of the fan speed.

[0067] The present application provides a control method for an air cooler fan unit of a converter valve cooling system, including: obtaining the outlet water temperature of the air cooler cooling water and the inlet valve temperature of the valve unit cooling water; if the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, taking the maximum value of the outlet water temperature and the inlet valve temperature as the control temperature; if the difference between the outlet water temperature and the inlet valve temperature is less than a preset value, judging whether the outlet water temperature transmitter of the air cooler is faulty; if all the outlet water temperature transmitters are faulty, taking the inlet valve temperature as the control temperature, and if at least one outlet water temperature transformer is not faulty, taking the outlet water temperature as the control temperature; controlling the start and stop and frequency of the fan in the air cooler fan unit according to the control temperature. When the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, taking the maximum value of the outlet water temperature and the inlet valve temperature as the control temperature, avoiding the situation where the fan cannot be started in time and the inlet valve temperature continues to increase, causing tripping, thereby improving the reliability of the DC system operation. In addition, when the difference between the outlet water temperature and the inlet valve temperature is less than the preset value and the outlet water temperature transmitters are faulty, the inlet valve temperature can be used as the control temperature, avoiding the limitation of only using the outlet water temperature as the control temperature for fan control, and further improving the reliability of the DC system operation.

[0068] Based on the above embodiments, the air cooler fan group of the embodiment of the present application includes multiple groups of variable frequency fan groups and multiple groups of industrial frequency fan groups, and the fans in the air cooler fan group are controlled to start and stop according to the control temperature, including: if the control temperature is higher than or equal to the variable frequency fan starting temperature, determine the first variable frequency fan group number corresponding to the variable frequency fan starting temperature, and start the variable frequency fan group based on the first variable frequency fan group number; after starting the variable frequency fan group based on the first variable frequency fan group number, if the control temperature is lower than the variable frequency fan starting temperature, and the difference between the variable frequency fan starting temperature and the control temperature is greater than or equal to the first preset value, stop the turned on variable frequency fan group; if the control temperature is higher than or equal to the industrial frequency fan starting temperature, determine the second variable frequency fan group number and the industrial frequency fan group number corresponding to the industrial frequency fan starting temperature, and start the variable frequency fan group and the industrial frequency fan group based on the second variable frequency fan group number and the industrial frequency fan group number; wherein, the industrial frequency fan starting temperature is greater than the variable frequency fan starting temperature. After the variable frequency fan group and the industrial frequency fan group are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is lower than the industrial frequency fan start-up temperature, and the difference between the industrial frequency fan start-up temperature and the control temperature is greater than or equal to the second preset value, the turned on industrial frequency fan group is stopped; wherein the second preset value is greater than the first preset value.

[0069] In the embodiment of the present application, the stop temperature of the variable frequency fan is the start temperature of the variable frequency fan minus the first preset value (2°C), and the stop temperature of the industrial frequency fan is the start temperature of the industrial frequency fan minus the second preset value (5°C). The purpose is to prevent the fan from starting and stopping frequently.

[0070] For example: the air cooler fan unit includes two sets of variable frequency fan units and four sets of industrial frequency fan units. The starting temperature of the variable frequency fan is 28℃, corresponding to starting one set of variable frequency fan units; the starting temperature of the variable frequency fan is 31℃, corresponding to starting two sets of variable frequency fan units; the starting temperature of the industrial frequency fan is 33℃, corresponding to starting two sets of variable frequency fan units and one set of industrial frequency fan units; the starting temperature of the industrial frequency fan is 35℃, corresponding to starting two sets of variable frequency fan units and two sets of industrial frequency fan units; the starting temperature of the industrial frequency fan is 36℃, corresponding to starting two sets of variable frequency fan units and three sets of industrial frequency fan units; the starting temperature of the industrial frequency fan is 37℃, corresponding to starting two sets of variable frequency fan units and four sets of industrial frequency fan units. The difference between the stopping temperature of the variable frequency fan and the starting temperature of the variable frequency fan is 2℃, and the difference between the stopping temperature of the industrial frequency fan and the starting temperature of the industrial frequency fan is 5℃. Of course, it is not limited to the above examples.

[0071] Based on the above example, the following describes how to control the start and stop of the fans in the air cooler fan unit according to the control temperature. If the control temperature is higher than or equal to 31°C, determine that the number of variable frequency fan units corresponding to 31°C is 2, and turn on 2 sets of variable frequency fan units; after turning on 2 sets of variable frequency fan units, if the control temperature is lower than 31°C, and the difference between the variable frequency fan start temperature 31°C and the control temperature is greater than or equal to 2°C, stop the turned-on variable frequency fan units, and you can stop one set of variable frequency fan units or both sets of variable frequency fan units, depending on the subsequent changes in the control temperature. If the control temperature is higher than or equal to 35°C, determine that the number of the second variable frequency fan units corresponding to 35°C is 2 and the number of industrial frequency fan units is 2, and turn on 2 sets of variable frequency fan units and 2 sets of industrial frequency fan units. After the two variable frequency fan units and the two power frequency fan units are turned on, if the control temperature is lower than 35°C, and the difference between 35°C and the control temperature is greater than or equal to 5°C, stop the turned on power frequency fan units. You can stop one of the power frequency fan units, or you can stop both of them, depending on the subsequent changes in the control temperature. When turning on the variable frequency fan unit and the power frequency fan unit, turn on the variable frequency fan unit first and then the power frequency fan unit.

[0072] Based on the above embodiments, the embodiments of the present application control the fan frequency in the air cooler fan group according to the control temperature, including: after the variable frequency fan group is turned on based on the first variable frequency fan group number, if the control temperature is lower than the variable frequency fan start-up temperature, and the difference between the variable frequency fan start-up temperature and the control temperature is less than the first preset value, the fan frequency of the turned-on variable frequency fan group is reduced; after the fan frequency is reduced to the minimum operating frequency, if the control temperature is still lower than the variable frequency fan start-up temperature, the turned-on variable frequency fan group is controlled to run at the minimum operating frequency for a preset time and then stop running; after the variable frequency fan group is turned on based on the first variable frequency fan group number, if the control temperature is higher than the variable frequency fan start-up temperature, the fan frequency of the turned-on variable frequency fan group is increased.

[0073] For example, after turning on two sets of variable frequency fan units, the control temperature is lower than 31°C, and the difference between 31°C and the control temperature is less than 2°C. The fan frequency of the variable frequency fan unit that has been turned on is reduced. When both sets of variable frequency fan units are reduced to the minimum operating frequency (20HZ), the control temperature is still lower than 31°C, and the variable frequency fan stops running at the minimum operating frequency for 20s. After turning on two sets of variable frequency fan units, if the control temperature is higher than 31°C, the fan frequency of the variable frequency fan unit that has been turned on is increased, and the fan frequency is increased to the maximum operating frequency (50HZ). Regarding how to increase and decrease the fan frequency of the variable frequency fan unit, the control temperature can be compared with the variable frequency fan starting temperature (31°C), and the fan frequency control amount can be calculated by the proportional-integral-differential (PID) algorithm. The frequency converter increases or decreases the frequency according to the fan frequency control amount to control the fan speed. Since the PID algorithm is a prior art, it will not be described here.

[0074] Based on the above embodiments, the embodiments of the present application control the fan frequency in the air cooler fan group according to the control temperature, including: after turning on the variable frequency fan group and the industrial frequency fan group based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is lower than the industrial frequency fan start-up temperature, and the difference between the industrial frequency fan start-up temperature and the control temperature is less than the second preset value, reducing the fan frequency of the turned-on variable frequency fan group; after the fan frequency is reduced to the minimum operating frequency, if the control temperature is still lower than the industrial frequency fan start-up temperature, controlling the turned-on variable frequency fan group to run at the minimum operating frequency for a preset time and then stopping the turned-on industrial frequency fan group; after turning on the variable frequency fan group and the industrial frequency fan group based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is higher than the industrial frequency fan start-up temperature, increasing the fan frequency of the turned-on variable frequency fan group.

[0075] For example, after turning on two sets of variable frequency fan units and three sets of industrial frequency fan units, the control temperature is lower than 36°C, and the difference between 36°C and the control temperature is less than 5°C. The fan frequency of the variable frequency fan units that have been turned on is reduced. After the fan frequency of the variable frequency fans in the two sets of variable frequency fan units is reduced to the minimum operating frequency, the control temperature is still lower than 36°C. The variable frequency fans run at the minimum operating frequency (20HZ) for 20s and then stop the industrial frequency fan units that have been turned on. The industrial frequency fan units can be stopped one by one according to the change in the control temperature. After turning on two sets of variable frequency fan units and three sets of industrial frequency fan units, if the control temperature is higher than 36°C, increase the fan frequency of the variable frequency fan units that have been turned on, and the fan frequency is increased to the maximum operating frequency (50HZ).

[0076] Among them, when operating a system containing variable frequency fans and industrial frequency fans, the usual strategy is to first reduce the frequency of the variable frequency fans and then shut down the industrial frequency fans. The purpose of this is to smoothly transition the system load while ensuring the stability and safety of the system. The variable frequency fan can achieve precise control of the air volume by adjusting the running speed of the motor through the frequency converter. When the system load needs to be reduced, the frequency of the variable frequency fan can be gradually reduced to reduce the air volume it provides. This method can provide more precise and flexible control, thereby reducing the impact on the system. After the frequency of the variable frequency fan is reduced to an appropriate level, the industrial frequency fan can be safely shut down. The industrial frequency fan usually operates at a fixed grid frequency and does not have the ability to adjust the frequency. Therefore, its start and stop operation will cause a greater impact on the system. By first reducing the frequency of the variable frequency fan, this impact can be reduced to ensure the smooth operation of the entire system.

[0077] Based on the above embodiments, each group of variable frequency fan groups in the embodiments of the present application includes multiple variable frequency fans, and each group of industrial frequency fan groups includes multiple industrial frequency fans. Controlling the start and stop of variable frequency fans and industrial frequency fans includes: starting multiple variable frequency fans in sequence at set intervals, and after all variable frequency fans are started, starting multiple industrial frequency fans in sequence at set intervals; stopping multiple industrial frequency fans in sequence at set intervals, and after all industrial frequency fans are stopped, stopping multiple variable frequency fans in sequence at set intervals. The interval time can be 2S. In addition, the control of the fans can be based on the first-start-first-stop and rotation control principles.

[0078] Based on the above embodiments, the outlet water temperature transmitter in the embodiment of the present application is a dual redundant configuration. If at least one outlet water temperature transformer is not faulty, the outlet water temperature is used as the control temperature, including: if both outlet water temperature transmitters are not faulty, the maximum value of the two outlet water temperatures detected by the two outlet water temperature transmitters is used as the control temperature; if one of the outlet water temperature transmitters is not faulty, the outlet water temperature detected by the outlet water temperature transmitter that has not failed is used as the control temperature.

[0079] The outlet water temperature transmitter in the embodiment of the present application is a dual redundant configuration to improve system reliability. If only relying on the data of one outlet water temperature transmitter, once the transmitter fails or has an error, the entire control may fail. The maximum value of the two outlet water temperatures detected by the two outlet water temperature transmitters is used as the control temperature, which can effectively avoid the situation where the cooling water is not cooled down properly due to the subsequent control of the fan.

[0080] Based on the above embodiments, the inlet valve temperature transmitter at the valve group of the embodiment of the present application is a triple redundant configuration, and the inlet valve temperature is used as the control temperature, including: if the three inlet valve temperature transmitters are all normal, the minimum value of the three inlet valve temperatures detected by the three inlet valve temperature transmitters is deleted, and the average value of the remaining two inlet valve temperatures is used as the control temperature; if the two inlet valve temperature transmitters are both normal, the maximum value of the two inlet valve temperatures detected by the two inlet valve temperature transmitters is used as the control temperature; if one of the inlet valve temperature transmitters is not faulty, the inlet valve temperature detected by the inlet valve temperature transmitter that is not faulty is used as the control temperature.

[0081] In the embodiment of the present application, if the three inlet valve temperature transmitters are all normal, the minimum value of the three inlet valve temperatures detected by the three inlet valve temperature transmitters is deleted, and the average value of the remaining two inlet valve temperatures is used as the control temperature. Deleting the minimum value can improve the accuracy of the control temperature. If the two inlet valve temperature transmitters are all normal, the maximum value of the two inlet valve temperatures detected by the two inlet valve temperature transmitters is used as the control temperature, which can effectively avoid the situation where the cooling water is not cooled down properly due to the subsequent control of the fan. The inlet valve temperature transmitter is a triple redundant configuration, which further improves the reliability and availability of the system.

[0082] It should be noted that when calculating the deviation of the outlet water temperature and the inlet valve temperature, the outlet water temperature can also adopt the two-out-of-one principle and the one-out-of-one principle, that is: if both outlet water temperature transmitters are not faulty, the maximum value of the two outlet water temperatures detected by the two outlet water temperature transmitters is used as the data for calculating the deviation; if one of the outlet water temperature transmitters is not faulty, the outlet water temperature detected by the outlet water temperature transmitter that has not failed is used as the data for calculating the deviation. The inlet valve temperature adopts the three-out-of-two principle, the two-out-of-one principle and the one-out-of-one principle, that is: if the three inlet valve temperature transmitters are normal, the minimum value of the three inlet valve temperatures detected by the three inlet valve temperature transmitters is deleted, and the average value of the remaining two inlet valve temperatures is used as the data for calculating the deviation; if both inlet valve temperature transmitters are normal, the maximum value of the two inlet valve temperatures detected by the two inlet valve temperature transmitters is used as the data for calculating the deviation; if one of the inlet valve temperature transmitters is not faulty, the inlet valve temperature detected by the inlet valve temperature transmitter that has not failed is used as the data for calculating the deviation.

[0083] Figure 2 is a structural diagram of a control system of an air cooler fan unit of a converter valve cooling system provided by the implementation of the present application, and Figure 3 is a structural diagram of a control system of another air cooler fan unit of a converter valve cooling system provided by the implementation of the present application. The control system includes a CPU module 1, a PID controller 2, a frequency converter 3, an I / O module 6 (full name: Input / Output Module, which is an electronic device used to realize input and output functions) and an interface module 7.

[0084] As shown in Figure 2, the CPU module 1 adopts a dual redundant configuration and is connected through synchronous optical fiber. It uses redundant Ethernet or PROFIBUS-DP lines (Decentralized Periphery, a high-speed, low-cost fieldbus communication protocol, mainly used for communication between device-level control systems and distributed I / O.) to control the redundant I / O module 6. The inlet valve temperature transmitter 4 and the outlet water temperature transmitter 5 are connected to the I / O module 6, and the I / O module 6 is connected to the CPU module 1 through the interface module 7. As shown in Figure 3, the CPU module 1 obtains the control temperature, performs PID calculations through the PID controller 2, and outputs analog signals. The frequency converter 3 converts the analog signals into execution quantities to control the frequency of the fan (variable frequency fan). Figure 4 is a structural diagram of a valve cooling system provided for the implementation of the present application. As shown in Figure 4, the outlet water temperature transmitter 5 is arranged at the outlet of the air cooler 8, and the inlet valve temperature transmitter 4 is arranged at the inlet of the valve group 12; in addition, in Figure 4, 8 is an air cooler, 9 is an electric three-way valve group, 10 is a main pump, 11 is a degassing tank, 12 is a valve group, 13 is a main filter, 14 is a raw water pump, 15 is a raw water tank, 16 is a make-up water pump, 17 is an ion exchange tank, 18 is a filter, 19 is an expansion buffer tank, 20 is an exhaust valve, and 21 is an ammonia cylinder. Since the valve cooling system is already available, it will not be described in detail here.

[0085] In the above embodiments, the control method of the air cooler fan unit of the converter valve cooling system is described in detail, and the present application also provides an embodiment corresponding to the control device of the air cooler fan unit of the converter valve cooling system. It should be noted that the present application describes the embodiments of the device part from two perspectives, one is based on the perspective of the functional module, and the other is based on the perspective of the hardware.

[0086] FIG5 is a structural diagram of a control device for an air cooler fan unit of a converter valve cooling system provided in an embodiment of the present application. As shown in FIG5 , a control device for an air cooler fan unit of a converter valve cooling system includes:

[0087] The acquisition module 30 is used to acquire the outlet water temperature of the cooling water of the air cooler and the inlet valve temperature of the cooling water of the valve group.

[0088] The first determination module 31 is used to use the maximum value of the water outlet temperature and the valve inlet temperature as the control temperature if the difference between the water outlet temperature and the valve inlet temperature is greater than or equal to a preset value.

[0089] The judgment module 32 is used to judge whether the outlet water temperature transmitter of the air cooler is faulty if the difference between the outlet water temperature and the inlet valve temperature is less than a preset value.

[0090] The second determination module 33 is used to use the inlet valve temperature as the control temperature if all the outlet water temperature transmitters are faulty, and use the outlet water temperature as the control temperature if at least one outlet water temperature transformer is not faulty.

[0091] The control module 34 is used to control the start and stop and frequency of the fans in the air cooler fan group according to the control temperature.

[0092] Since the embodiments of the apparatus part correspond to the embodiments of the method part, please refer to the description of the embodiments of the method part for the embodiments of the apparatus part, which will not be repeated here.

[0093] FIG6 is a structural diagram of another control device for an air cooler fan unit of a converter valve cooling system provided in an embodiment of the present application. As shown in FIG6 , the control device for an air cooler fan unit of a converter valve cooling system includes: a memory 40 for storing a computer program;

[0094] The processor 41 is used to implement the steps of the control method of the air cooler fan unit of the converter valve cooling system in the above embodiment when executing the computer program.

[0095] The control device of the air cooler fan unit of the converter valve cooling system provided in this embodiment may include but is not limited to a smart phone, a tablet computer, a laptop computer or a desktop computer.

[0096] Among them, the processor 41 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 41 can be implemented in at least one hardware form of a digital signal processor (DSP), a field-programmable gate array (FPGA), and a programmable logic array (PLA). The processor 41 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 41 may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 41 may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0097] The memory 40 may include one or more computer-readable storage media, which may be non-transitory. The memory 40 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory 40 is at least used to store the following computer program 401, wherein, after the computer program is loaded and executed by the processor 41, it can implement the relevant steps of the control method of the air cooler fan unit of the converter valve cooling system disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory 40 may also include an operating system 402 and data 403, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system 402 may include Windows, Unix, Linux, etc. Data 403 may include but is not limited to outlet water temperature and inlet valve temperature, etc.

[0098] In some embodiments, the control device of the air cooler fan unit of the converter valve cooling system may also include a display screen 42 , an input / output interface 43 , a communication interface 44 , a power supply 45 and a communication bus 46 .

[0099] Those skilled in the art will appreciate that the structure shown in FIG. 6 does not constitute a limitation on the control device of the air cooler fan unit of the converter valve cooling system, and may include more or fewer components than those shown in the figure.

[0100] The control device of the air cooler fan group of the converter valve cooling system provided in the embodiment of the present application includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: obtain the outlet water temperature of the air cooler cooling water and the inlet valve temperature of the valve group cooling water; if the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to the preset value, use the maximum value of the outlet water temperature and the inlet valve temperature as the control temperature; if the difference between the outlet water temperature and the inlet valve temperature is less than the preset value, determine whether the outlet water temperature transmitter of the air cooler is faulty; if all the outlet water temperature transmitters are faulty, use the inlet valve temperature as the control temperature, if at least one outlet water temperature transformer is not faulty, use the outlet water temperature as the control temperature; control the start and stop and frequency of the fans in the air cooler fan group according to the control temperature.

[0101] Finally, the present application also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps described in the control method of the air cooler fan unit of the converter valve cooling system in the above method embodiment are implemented.

[0102] It is understandable that if the method in the above embodiment is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0103] The control method, device and medium of the air cooler fan unit of the converter valve cooling system provided by the present application are introduced in detail above. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referenced to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

[0104] It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

Claims

1. A control method for an air cooler fan unit of a converter valve cooling system, characterized in that: include: Obtain the outlet water temperature of the air cooler cooling water and the inlet valve temperature of the valve group cooling water; If the difference between the outlet water temperature and the inlet valve temperature is greater than or equal to a preset value, the maximum value of the outlet water temperature and the inlet valve temperature is used as the control temperature; If the excess difference between the outlet water temperature and the inlet valve temperature is less than the preset value, it is determined whether the outlet water temperature transmitter of the air cooler is faulty; If all of the outlet water temperature transmitters are faulty, the inlet valve temperature is used as the control temperature; if at least one of the outlet water temperature transformers is not faulty, the outlet water temperature is used as the control temperature; The start and stop and frequency of the fans in the air cooler fan group are controlled according to the control temperature.

2. The control method of the air cooler fan unit of the converter valve cooling system according to claim 1, characterized in that: The air cooler fan group includes multiple groups of variable frequency fan groups and multiple groups of industrial frequency fan groups, and the fans in the air cooler fan group are controlled to start and stop according to the control temperature, including: If the control temperature is higher than or equal to the variable frequency fan start-up temperature, determine the first variable frequency fan group number corresponding to the variable frequency fan start-up temperature, and start the variable frequency fan group based on the first variable frequency fan group number; After the variable frequency fan group is turned on based on the first variable frequency fan group number, if the control temperature is lower than the variable frequency fan start-up temperature, and the difference between the variable frequency fan start-up temperature and the control temperature is greater than or equal to a first preset value, the turned-on variable frequency fan group is stopped; If the control temperature is higher than or equal to the power frequency fan starting temperature, determine the second variable frequency fan group number and the power frequency fan group number corresponding to the power frequency fan starting temperature, and start the variable frequency fan group and the power frequency fan group based on the second variable frequency fan group number and the power frequency fan group number; wherein the power frequency fan starting temperature is greater than the variable frequency fan starting temperature; After the variable frequency fan group and the industrial frequency fan group are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is lower than the industrial frequency fan start-up temperature, and the difference between the industrial frequency fan start-up temperature and the control temperature is greater than or equal to a second preset value, the turned on industrial frequency fan group is stopped; wherein the second preset value is greater than the first preset value.

3. The control method of the air cooler fan unit of the converter valve cooling system according to claim 2, characterized in that: Controlling the fan frequency in the air cooler fan unit according to the control temperature includes: After the variable frequency fan group is turned on based on the first variable frequency fan group number, if the control temperature is lower than the variable frequency fan start-up temperature, and the difference between the variable frequency fan start-up temperature and the control temperature is less than a first preset value, reducing the fan frequency of the turned-on variable frequency fan group; After the fan frequency is reduced to the minimum operating frequency, if the control temperature is still lower than the variable frequency fan start-up temperature, the turned-on variable frequency fan unit is controlled to run at the minimum operating frequency for a preset time and then stop running; After the variable frequency fan groups are turned on based on the first number of variable frequency fan groups, if the control temperature is higher than the variable frequency fan start-up temperature, the fan frequency of the turned-on variable frequency fan groups is increased.

4. The control method of the air cooler fan unit of the converter valve cooling system according to claim 2, characterized in that: Controlling the fan frequency in the air cooler fan unit according to the control temperature includes: After the variable frequency fan group and the industrial frequency fan group are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is lower than the industrial frequency fan start-up temperature, and the difference between the industrial frequency fan start-up temperature and the control temperature is less than a second preset value, the fan frequency of the turned-on variable frequency fan group is reduced; After the fan frequency is reduced to the minimum operating frequency, if the control temperature is still lower than the industrial frequency fan start-up temperature, the turned-on variable frequency fan unit is controlled to run at the minimum operating frequency for a preset period of time and then the turned-on industrial frequency fan unit is stopped; After the variable frequency fan groups and the industrial frequency fan groups are turned on based on the second variable frequency fan group number and the industrial frequency fan group number, if the control temperature is higher than the industrial frequency fan start-up temperature, the fan frequency of the turned-on variable frequency fan groups is increased.

5. The control method of the air cooler fan unit of the converter valve cooling system according to claim 2, characterized in that: Each variable frequency fan group includes multiple variable frequency fans, and each industrial frequency fan group includes multiple industrial frequency fans. The start and stop of the variable frequency fans and industrial frequency fans are controlled, including: Start multiple variable frequency fans in sequence at set intervals, and after all variable frequency fans are started, start multiple industrial frequency fans in sequence at set intervals; Multiple industrial frequency fans are stopped in sequence at set intervals, and after all industrial frequency fans are stopped, multiple variable frequency fans are stopped in sequence at set intervals.

6. The control method of the air cooler fan unit of the converter valve cooling system according to claim 1, characterized in that: The outlet water temperature transmitter is configured with dual redundancy, and if at least one of the outlet water temperature transformers is not faulty, the outlet water temperature is used as the control temperature, including: If both of the two outlet water temperature transmitters are not faulty, the maximum value of the two outlet water temperatures detected by the two outlet water temperature transmitters is used as the control temperature; If one of the outlet water temperature transmitters is not faulty, the outlet water temperature detected by the outlet water temperature transmitter that is not faulty is used as the control temperature.

7. The control method of the air cooler fan unit of the converter valve cooling system according to claim 1, characterized in that: The inlet valve temperature transmitter at the valve group is a triple redundant configuration, and the inlet valve temperature is used as the control temperature, including: If the three inlet valve temperature transmitters are all normal, the minimum value of the three inlet valve temperatures detected by the three inlet valve temperature transmitters is deleted, and the average value of the remaining two inlet valve temperatures is used as the control temperature; If both of the two inlet valve temperature transmitters are normal, the maximum value of the two inlet valve temperatures detected by the two inlet valve temperature transmitters is used as the control temperature; If one of the inlet valve temperature transmitters is not faulty, the inlet valve temperature detected by the inlet valve temperature transmitter that is not faulty is used as the control temperature.

8. A control device for an air cooler fan unit of a converter valve cooling system, characterized in that: include: An acquisition module is used to obtain the outlet water temperature of the cooling water of the air cooler and the inlet valve temperature of the cooling water of the valve group; A first determination module, configured to use the maximum value of the water outlet temperature and the valve inlet temperature as the control temperature if the excess difference between the water outlet temperature and the valve inlet temperature is greater than or equal to a preset value; A judgment module, used for judging whether the outlet water temperature transmitter of the air cooler is faulty if the excess difference between the outlet water temperature and the inlet valve temperature is less than the preset value; A second determination module is used to use the inlet valve temperature as the control temperature if all of the outlet water temperature transmitters are faulty, and use the outlet water temperature as the control temperature if at least one of the outlet water temperature transformers is not faulty; The control module is used to control the start and stop and frequency of the fans in the air cooler fan group according to the control temperature.

9. A control device for an air cooler fan unit of a converter valve cooling system, characterized in that: comprising a memory for storing a computer program; A processor, configured to implement the steps of the method for controlling an air cooler fan unit of a converter valve cooling system as claimed in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for controlling the air cooler fan unit of the converter valve cooling system according to any one of claims 1 to 7 are implemented.

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