Circulating cooling water system and method

Abstract

The invention relates to the technical field of phase modifier cooling, and discloses a circulating cooling water system and method.The circulating cooling water system comprises a cooler used for cooling hot air generated during operation of a phase modifier; the data acquisition module is used for acquiring air inlet hot air temperature, air outlet hot air temperature and air inlet hot air flow of the cooler; the circulation module is used for adjusting the working state of a circulation water pump in the circulation module according to the data collected by the data collection module, and a core circulation water pump and a standby circulation water pump are arranged in the circulation module; the correction module is used for judging whether to correct the circulation module or not according to the data acquired by the data acquisition module; and the safety module is used for giving out corresponding reminding and alarming according to the data acquired by the data acquisition module. According to the technical scheme provided by the invention, the rotating speed of the internal circulating water pump can be automatically adjusted according to the hot air data generated by the operation of the phase modifier, so that the intelligent adjustment of the circulating cooling water flow is realized, and a better cooling effect is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of synchronous condenser cooling, and in particular, to a circulating cooling water system and method. Background Art

[0002] In modern power systems, synchronous condensers, as important reactive power compensation devices, are widely used in power transmission, distribution, and industrial fields. They can provide stable voltage support and improve the frequency stability of the system. With the expansion of the scale of power systems, higher requirements are put forward for the performance and reliability of synchronous condensers. As one of the key factors to ensure the normal operation of synchronous condensers, cooling technology also needs to be continuously developed and innovated. In water-scarce areas, traditional water-cooling methods may be restricted, while the closed air-cooling method requires no large amount of water and has better adaptability, which can meet the cooling needs of synchronous condensers in different regions.

[0003] However, in the process of implementing the technical solutions of the present invention by the inventors of the present application, it is found that the above technologies have at least the following technical problems: Since the response speed of air cooling is relatively slow, when the load of the synchronous condenser changes rapidly, the circulating cooling water system may not be able to adjust the cooling effect in time, resulting in poor cooling effect on the hot air entering the cooler and unable to achieve efficient cooling of the temperature of the synchronous condenser. Summary of the Invention

[0004] Embodiments of the present invention provide a circulating cooling water system and method to solve the technical problem that the circulating cooling water system of a synchronous condenser in the prior art cannot be intelligently adjusted for the circulating cooling air system.

[0005] To achieve the above object, the present invention provides a circulating cooling water system, including: A cooler for cooling the hot air generated during the operation of the synchronous condenser; A data acquisition module for collecting the temperature of the hot air at the inlet of the cooler, the temperature of the hot air at the outlet of the cooler, and the flow rate of the hot air at the inlet; A circulation module for adjusting the working state of the internal circulating water pump of the circulation module according to the data collected by the data acquisition module. A core circulating water pump and a standby circulating water pump are arranged in the circulation module; A correction module for judging whether to correct the circulation module according to the data collected by the data acquisition module; A safety module for sending corresponding reminders and alarms according to the data collected by the data acquisition module.

[0006] Further, the circulation module for adjusting the working state of the internal circulating water pump of the circulation module according to the data collected by the data acquisition module includes: Obtain the temperature and flow rate of the hot air at the air inlet at the current moment; Preset the reference temperature and reference flow rate of the hot air, and calculate the hot air evaluation factor: ; where A is the hot air evaluation factor, is the weight of the hot air flow rate, with a value of 0.45, is the hot air flow rate at the air inlet, is the reference flow rate of the hot air, is the weight of the hot air temperature, with a value of 0.55, is the hot air temperature at the air inlet, is the reference temperature of the hot air.

[0007] Furthermore, the circulation module is used to adjust the working state of the internal circulation water pump of the circulation module according to the data collected by the data acquisition module, including: Preset the threshold of the hot air evaluation factor; If the hot air evaluation factor is less than or equal to the threshold of the hot air evaluation factor, only turn on the core circulation water pump to enter the operating state, and keep the standby circulation water pump in the closed state; If the hot air evaluation factor is greater than the threshold of the hot air evaluation factor, turn on both the core circulation water pump and the standby circulation water pump to enter the operating state.

[0008] Furthermore, the circulation module is used to adjust the working state of the internal circulation water pump of the circulation module according to the data collected by the data acquisition module, including: When the hot air evaluation factor is less than or equal to the threshold of the hot air evaluation factor, calculate the rotational speed of the core circulation water pump according to the hot air evaluation factor: ; where, is the rotational speed of the core circulation water pump, a is the adjustment coefficient, which can be adjusted according to historical data, is the basic rotational speed, which can be adjusted according to historical data; Control the flow rate of the circulating cooling water according to the rotational speed of the core circulation water pump as the current rotational speed of the core circulation water pump.

[0009] Furthermore, the circulation module is used to adjust the working state of the internal circulation water pump of the circulation module according to the data collected by the data acquisition module, including: When the hot air evaluation factor is greater than the threshold of the hot air evaluation factor, calculate the evaluation risk value, and the evaluation risk value is the difference between the hot air evaluation factor and the threshold of the hot air evaluation factor; Preset a first preset evaluation risk value, a second evaluation risk value, and a third evaluation risk value, where the first preset evaluation risk value is less than the second evaluation risk value, and the second evaluation risk value is less than the third evaluation risk value; Preset a peak rotational speed, a first preset rotational speed, a second preset rotational speed, a third preset rotational speed, and a fourth preset rotational speed; Set the peak rotational speed as the current rotational speed of the core circulating water pump; When the evaluation risk value is less than or equal to the first preset evaluation risk value, select the first preset rotational speed as the current rotational speed of the standby circulating water pump; When the evaluation risk value is greater than the first preset evaluation risk value and less than or equal to the second preset evaluation risk value, select the second preset rotational speed as the current rotational speed of the standby circulating water pump; When the evaluation risk value is greater than the second preset evaluation risk value and less than or equal to the third preset evaluation risk value, select the third preset rotational speed as the current rotational speed of the standby circulating water pump; When the evaluation risk value is greater than the third preset evaluation risk value, select the fourth preset rotational speed as the current rotational speed of the standby circulating water pump.

[0010] Further, the correction module is configured to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: Obtain the hot air temperature at the air outlet at multiple moments, and calculate the cooling evaluation factor of the hot air temperature at the air outlet at multiple moments: ; where x is the cooling evaluation factor, m is the number of moments, is the weight, and is the hot air temperature at the air outlet at the i-th moment; Preset a cooling evaluation threshold; If the cooling evaluation factor is less than or equal to the cooling evaluation threshold, it is determined that no correction is required; If the cooling evaluation factor is greater than the cooling evaluation threshold, it is determined that correction is required.

[0011] Further, the correction module is configured to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: Preset an ideal cooling temperature of the hot air; When the cooling evaluation factor is greater than the cooling evaluation threshold, obtain the hot air temperature at the air outlet that is greater than the ideal cooling temperature of the hot air among the multiple moments, and set the obtained hot air temperature at the air outlet as the hot air risk temperature, and calculate the correction coefficient: ; where B is the correction coefficient, j is the number of hot air risk temperatures, is the weight, and , is the i-th hot air risk temperature, is the ideal cooling temperature of the hot air, is the maximum value among all hot air risk temperatures, is the minimum value among all hot air risk temperatures.

[0012] Furthermore, the correction module is used to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: If only the core circulation water pump is in operation currently, obtain the current rotation speed of the core circulation water pump; Perform correction control on the current rotation speed of the core circulation water pump according to the correction coefficient: ; where, is the corrected rotation speed of the core circulation water pump, b is the correction adjustment coefficient, which can be adjusted according to historical data, is the current rotation speed of the core circulation water pump.

[0013] Furthermore, the correction module is used to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: If the core circulation water pump and the standby circulation water pump are both in operation currently, obtain the current rotation speed of the standby circulation water pump; Pre-set a correction coefficient - rotation speed adjustment factor mapping table, and select a rotation speed adjustment factor according to the correction coefficient - rotation speed adjustment factor mapping table to perform correction control on the current rotation speed of the standby circulation water pump, and the corrected rotation speed of the standby circulation water pump = the current rotation speed of the standby circulation water pump rotation speed adjustment factor.

[0014] To achieve the above object, the present invention also provides a circulating cooling water method, including: Configure a cooler to cool the hot air generated during the operation of the synchronous condenser; Collect the hot air temperature at the air inlet of the cooler, the hot air temperature at the air outlet, and the hot air flow rate at the air inlet; Adjust the operating state of the circulating water pump according to the collected hot air temperature and hot air flow rate at the air inlet. The circulating water pump includes a core circulating water pump and a standby circulating water pump; Judge whether to correct the circulating water pump according to the collected hot air temperature at the air outlet; Send corresponding reminders and alarms according to the collected hot air temperature, hot air temperature at the air outlet, and hot air flow rate at the air inlet.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention discloses a circulating cooling water system and method, which cools the hot air generated by the circulating cooling air system during the operation of the synchronous condenser, obtains the hot air parameters generated by the synchronous condenser in real time, dynamically adjusts the circulating cooling water system according to the hot air parameters to ensure effective cooling of the hot air. At the same time, a core circulating water pump and an auxiliary circulating water pump are set to operate in coordination. When the synchronous condenser operates at a low load, only the core circulating water pump is turned on to avoid waste of resources. When the synchronous condenser enters a high-load operation, the auxiliary circulating water pump is automatically turned on to quickly cool the hot air. In addition, a correction module is added to perform negative feedback adjustment on the circulating cooling water system according to the cooled hot air data to improve the control accuracy. Brief Description of the Drawings

[0016] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings: Figure 1 Shows a schematic structural diagram of a circulating cooling water system in an embodiment of the present invention; Figure 2 Shows a schematic flow diagram of a circulating cooling water method in an embodiment of the present invention. Detailed Embodiments

[0017] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention in detail. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0018] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0019] The terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0020] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0021] The following is a description of the preferred embodiments of the present invention in conjunction with the drawings.

[0022] As Figure 1 shown, the embodiments of the present invention disclose a circulating cooling water system, including: A cooler for cooling the hot air generated during the operation of the synchronous condenser. A data acquisition module for acquiring the temperature of the hot air at the inlet of the cooler, the temperature of the hot air at the outlet of the cooler, and the flow rate of the hot air at the inlet. A circulation module for adjusting the working state of the internal circulating water pump of the circulation module according to the data acquired by the data acquisition module. A core circulating water pump and a standby circulating water pump are arranged in the circulation module. A correction module for judging whether to correct the circulation module according to the data acquired by the data acquisition module. A safety module for sending corresponding reminders and alarms according to the data acquired by the data acquisition module.

[0023] In this embodiment, the safety module can judge whether to issue a high-temperature alarm according to the temperature of the hot air at the inlet and the flow rate of the hot air at the inlet, and judge whether to issue a cooling abnormality alarm according to the temperature of the hot air at the outlet.

[0024] In some embodiments of the present application, a circulation module is configured to adjust the working state of the internal circulation water pump of the circulation module according to the data collected by the data acquisition module, including: Obtain the hot air temperature and hot air flow rate at the air inlet at the current moment; Preset a reference hot air temperature and a reference hot air flow rate, and calculate a hot air evaluation factor: ; where A is the hot air evaluation factor, is the hot air flow weight, with a value of 0.45, is the hot air flow rate at the air inlet, is the reference hot air flow rate, is the hot air temperature weight, with a value of 0.55, is the hot air temperature at the air inlet, is the reference hot air temperature.

[0025] In this embodiment, the hot air evaluation factor is obtained in real time according to the hot air temperature and hot air flow rate at the air inlet.

[0026] In this embodiment, a circulation module is configured to adjust the working state of the internal circulation water pump of the circulation module according to the data collected by the data acquisition module, including: Preset a hot air evaluation factor threshold; If the hot air evaluation factor is less than or equal to the hot air evaluation factor threshold, only the core circulation water pump is started to enter the operating state, and the standby circulation water pump is kept in the closed state; If the hot air evaluation factor is greater than the hot air evaluation factor threshold, both the core circulation water pump and the standby circulation water pump are started to enter the operating state.

[0027] The beneficial effects of the above technical solution are as follows: The operating state of the circulation water pump is determined in real time according to the hot air evaluation factor. When the hot air flow rate and temperature at the air inlet are low, the core circulation water pump can independently control the flow rate of the circulating cooling water, avoiding excessive resource consumption; when the hot air flow rate and temperature at the air inlet are high, the dual-circulation water pump operation mode is started, which not only realizes the rapid cooling of the hot air but also avoids the overload phenomenon when only one circulation water pump is operating.

[0028] In some embodiments of the present application, a circulation module is configured to adjust the working state of the internal circulation water pump of the circulation module according to the data collected by the data acquisition module, including: When the hot air evaluation factor is less than or equal to the hot air evaluation factor threshold, calculate the rotational speed of the core circulation water pump according to the hot air evaluation factor: ; where is the rotational speed of the core circulating water pump, and a is the adjustment coefficient, which can be adjusted according to historical data. is the base rotational speed, which can be adjusted according to historical data; Control the circulating cooling water flow according to the rotational speed of the core circulating water pump as the current rotational speed of the core circulating water pump.

[0029] In this embodiment, the circulating cooling water flow is proportional to the rotational speed of the circulating water pump. The higher the rotational speed of the circulating water pump, the greater the circulating cooling water flow. When the temperature and flow of the hot air at the air inlet are greater, the circulating cooling water flow is also greater.

[0030] In this embodiment, the circulation module is used to adjust the working state of the circulating water pump inside the circulation module according to the data collected by the data acquisition module, including: When the hot air evaluation factor is greater than the hot air evaluation factor threshold, calculate the evaluation risk value, and the evaluation risk value is the difference between the hot air evaluation factor and the hot air evaluation factor threshold; Preset the first preset evaluation risk value, the second evaluation risk value, and the third evaluation risk value. The first preset evaluation risk value is less than the second evaluation risk value, and the second evaluation risk value is less than the third evaluation risk value; Preset the peak rotational speed, the first preset rotational speed, the second preset rotational speed, the third preset rotational speed, and the fourth preset rotational speed; Set the peak rotational speed as the current rotational speed of the core circulating water pump; When the evaluation risk value is less than or equal to the first preset evaluation risk value, select the first preset rotational speed as the current rotational speed of the standby circulating water pump; When the evaluation risk value is greater than the first preset evaluation risk value and less than or equal to the second preset evaluation risk value, select the second preset rotational speed as the current rotational speed of the standby circulating water pump; When the evaluation risk value is greater than the second preset evaluation risk value and less than or equal to the third preset evaluation risk value, select the third preset rotational speed as the current rotational speed of the standby circulating water pump; When the evaluation risk value is greater than the third preset evaluation risk value, select the fourth preset rotational speed as the current rotational speed of the standby circulating water pump.

[0031] In this embodiment, the peak rotational speed is within the safe operating range of the rotational speed of the core circulating water pump, and the first preset rotational speed, the second preset rotational speed, the third preset rotational speed, and the fourth preset rotational speed increase in sequence.

[0032] The beneficial effects of the above technical solution are: When two circulating water pumps need to operate simultaneously, fix the rotational speed of the core circulating water pump, turn on the standby circulating water pump to assist in adjusting the circulating cooling water flow, avoid the rotational speed of the core circulating water pump rising continuously and causing overload operation, and extend the service life of the circulating water pump.

[0033] In some embodiments of the present application, a correction module is configured to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: Obtain the hot air temperature at the air outlet at multiple moments, and calculate the cooling evaluation factor of the hot air temperature at the air outlet at multiple moments: ; where x is the cooling evaluation factor, m is the number of moments, is the weight, and , is the hot air temperature at the air outlet at the i-th moment; Preset a cooling evaluation threshold; If the cooling evaluation factor is less than or equal to the cooling evaluation threshold, it is determined that no correction is required; If the cooling evaluation factor is greater than the cooling evaluation threshold, it is determined that correction is required.

[0034] In this embodiment, a correction module is configured to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: Preset the ideal cooling temperature of the hot air; When the cooling evaluation factor is greater than the cooling evaluation threshold, obtain all the hot air temperatures at the air outlet that are greater than the ideal cooling temperature of the hot air among multiple moments, and set the obtained hot air temperatures at the air outlet as the hot air risk temperatures, and calculate the correction coefficient: ; where B is the correction coefficient, j is the number of hot air risk temperatures, is the weight, and , is the i-th hot air risk temperature, is the ideal cooling temperature of the hot air, is the maximum value among all the hot air risk temperatures, is the minimum value among all the hot air risk temperatures.

[0035] In this embodiment, negative feedback regulation is performed on the entire circulating cooling water system according to the hot air temperature at the air outlet to ensure that the hot air temperature discharged from the circulating cooling water system is reduced to the ideal range.

[0036] In this embodiment, a correction module is configured to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: If only the core circulating water pump is in operation currently, obtain the current rotational speed of the core circulating water pump; Perform correction control on the current rotational speed of the core circulating water pump according to the correction coefficient: ; Wherein, is the corrected rotational speed of the core circulating water pump, and b is the correction adjustment coefficient, which can be adjusted according to historical data. is the current rotational speed of the core circulating water pump.

[0037] In this embodiment, the correction module is used to determine whether to correct the circulation module according to the data collected by the data acquisition module, including: If both the current core circulating water pump and the standby circulating water pump are in the running state, obtain the current rotational speed of the standby circulating water pump; Preset a correction coefficient - rotational speed adjustment factor mapping table, and select a rotational speed adjustment factor according to the correction coefficient - rotational speed adjustment factor mapping table to perform correction control on the current rotational speed of the standby circulating water pump. The corrected rotational speed of the standby circulating water pump = the current rotational speed of the standby circulating water pump × the rotational speed adjustment factor.

[0038] In this embodiment, in the correction coefficient - rotational speed adjustment factor mapping table, each correction coefficient can query a unique rotational speed adjustment factor. If the rotational speed adjustment factor corresponding to the correction coefficient obtained according to the current moment in the correction coefficient - rotational speed adjustment factor mapping table is l, then the corrected rotational speed of the standby circulating water pump is l times the current rotational speed of the standby circulating water pump. The correction coefficient - rotational speed adjustment factor mapping table can be adjusted accordingly according to historical data and experience.

[0039] The beneficial effects of the above technical solution are: According to the different operating states of the circulating water pump, different correction methods are selected to achieve precise control of the rotational speed of the circulating water pump. When only the core circulating water pump is in the running state, only the core circulating water pump is corrected. If both circulating water pumps are in the running state at the same time, only the standby circulating water pump is corrected, further achieving precise control of the circulating cooling water flow.

[0040] In order to further elaborate the technical idea of the present invention, the technical solution of the present invention will be described in combination with a specific application scenario.

[0041] Correspondingly, as Figure 2 shown, the present application also provides a circulating cooling water method, including: S110: Configure a cooler to cool the hot air generated during the operation of the synchronous condenser; S120: Collect the hot air temperature at the inlet of the cooler, the hot air temperature at the outlet of the cooler, and the hot air flow rate at the inlet; S130: Adjust the working state of the circulating water pump according to the collected hot air temperature at the inlet of the cooler and the hot air flow rate at the inlet. The circulating water pump includes a core circulating water pump and a standby circulating water pump; S140: Determine whether to correct the circulating water pump according to the collected hot air temperature at the outlet of the cooler; S150: Issue corresponding reminders and alarms based on the collected hot air temperature at the air inlet, hot air temperature at the air outlet, and hot air flow rate at the air inlet.

[0042] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0043] Although the present invention has been described above with reference to embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed by the present invention can be combined with each other in any way, and the fact that the combinations of these are not all described in this specification is only for the sake of saving space and resources.

[0044] Those of ordinary skill in the art can understand that the above are only preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A circulating cooling water system, characterized in that: include: A cooler is used to cool down the hot air generated during the operation of the phase regulator; A data acquisition module, used to collect the hot air temperature at the air inlet, the hot air temperature at the air outlet, and the hot air flow at the air inlet of the cooler; A circulation module, used for adjusting the working state of the circulation water pump inside the circulation module according to the data collected by the data collection module, wherein the circulation module is provided with a core circulation water pump and a backup circulation water pump; A correction module, used for determining whether to correct the circulation module according to the data collected by the data collection module; The security module is used to issue corresponding reminders and alarms according to the data collected by the data collection module.

2. A circulating cooling water system according to claim 1, characterized in that: The circulation module is used to adjust the working state of the circulating water pump inside the circulation module according to the data collected by the data collection module, including: Get the hot air temperature and hot air flow rate of the air inlet at the current moment; Preset the hot air reference temperature and hot air reference flow rate, and calculate the hot air assessment factor: ; Where A is the hot air assessment factor, is the hot air flow weight, the value is 0.45, is the hot air flow at the air inlet, is the hot air reference flow rate, is the hot air temperature weight, the value is 0.55, is the hot air temperature at the air inlet, is the hot air reference temperature.

3. A circulating cooling water system according to claim 2, characterized in that: The circulation module is used to adjust the working state of the circulating water pump inside the circulation module according to the data collected by the data collection module, including: Pre-set hot air assessment factor thresholds; If the hot air assessment factor is less than or equal to the hot air assessment factor threshold, only the core circulating water pump is turned on to enter the running state, and the standby circulating water pump is kept off; If the hot air assessment factor is greater than the hot air assessment factor threshold, the core circulation water pump and the standby circulation water pump are simultaneously turned on and enter the operating state.

4. A circulating cooling water system according to claim 3, characterized in that: The circulation module is used to adjust the working state of the circulating water pump inside the circulation module according to the data collected by the data collection module, including: When the hot air assessment factor is less than or equal to the hot air assessment factor threshold, the core circulation water pump speed is calculated according to the hot air assessment factor: ; in, is the core circulating water pump speed, a is the adjustment coefficient, which can be adjusted according to historical data. It is the basic speed and can be adjusted according to historical data; The circulating cooling water flow rate is controlled according to the core circulating water pump speed as the current speed of the core circulating water pump.

5. A circulating cooling water system according to claim 3, characterized in that: The circulation module is used to adjust the working state of the circulating water pump inside the circulation module according to the data collected by the data collection module, including: When the hot air assessment factor is greater than the hot air assessment factor threshold, calculating an assessment risk value, the assessment risk value being the difference between the hot air assessment factor and the hot air assessment factor threshold; Presetting a first preset risk assessment value, a second risk assessment value, and a third risk assessment value, wherein the first preset risk assessment value is smaller than the second risk assessment value, and the second risk assessment value is smaller than the third risk assessment value; Preset a peak speed, a first preset speed, a second preset speed, a third preset speed, and a fourth preset speed; The peak speed is set as the current speed of the core circulating water pump; When the assessed risk value is less than or equal to the first preset assessed risk value, the first preset speed is selected as the current speed of the standby circulating water pump; When the assessed risk value is greater than the first preset assessed risk value and less than or equal to the second preset assessed risk value, the second preset speed is selected as the current speed of the standby circulating water pump; When the assessed risk value is greater than the second preset assessed risk value and less than or equal to the third preset assessed risk value, the third preset speed is selected as the current speed of the standby circulating water pump; When the assessed risk value is greater than the third preset assessed risk value, the fourth preset rotational speed is selected as the current rotational speed of the standby circulating water pump.

6. A circulating cooling water system according to claim 1, characterized in that: The correction module is used to determine whether to correct the circulation module according to the data collected by the data collection module, including: The hot air temperature at the air outlet at multiple moments is obtained, and the cooling assessment factor of the hot air temperature at the air outlet at multiple moments is calculated: ; Where x is the cooling evaluation factor, m is the number of moments, is the weight, and , is the hot air temperature at the outlet at the i-th moment; Pre-set cooling assessment thresholds; If the cooling assessment factor is less than or equal to the cooling assessment threshold, it is determined that no correction is required; If the cooling assessment factor is greater than the cooling assessment threshold, it is determined that correction is required.

7. A circulating cooling water system according to claim 6, characterized in that: The correction module is used to determine whether to correct the circulation module according to the data collected by the data collection module, including: Pre-set ideal cooling temperature for hot air; When the cooling assessment factor is greater than the cooling assessment threshold, all outlet hot air temperatures greater than the hot air ideal cooling temperature at the multiple moments are obtained, and the obtained outlet hot air temperatures are set as hot air risk temperatures, and the correction coefficient is calculated: ; Where B is the correction factor, j is the number of hot air risk temperatures, is the weight, and , is the ith hot air risk temperature, Ideal cooling temperature for hot air, is the maximum value among all hot air risk temperatures. This is the minimum value among all hot air risk temperatures.

8. A circulating cooling water system according to claim 7, characterized in that: The correction module is used to determine whether to correct the circulation module according to the data collected by the data collection module, including: If only the core circulating water pump is currently in operation, then the current speed of the core circulating water pump is obtained; The current speed of the core circulating water pump is corrected and controlled according to the correction coefficient: ; in, is the corrected core circulation water pump speed, b is the correction adjustment coefficient, which can be adjusted according to historical data. It is the current speed of the core circulating water pump.

9. A circulating cooling water system according to claim 6, characterized in that: The correction module is used to determine whether to correct the circulation module according to the data collected by the data collection module, including: If the core circulating water pump and the standby circulating water pump are both in operation, the current rotation speed of the standby circulating water pump is obtained; A correction coefficient-speed adjustment factor mapping table is pre-set, and a speed adjustment factor is selected according to the correction coefficient-speed adjustment factor mapping table to correct and control the current speed of the standby circulating water pump. The corrected speed of the standby circulating water pump = the current speed of the standby circulating water pump Speed ​​adjustment factor.

10. A circulating cooling water method, characterized in that: include: Configure a cooler to cool down the hot air generated during the operation of the phase regulator; Collecting the hot air temperature at the air inlet, the hot air temperature at the air outlet, and the hot air flow at the air inlet of the cooler; Adjusting the working state of the circulating water pump according to the collected hot air temperature and hot air flow rate at the air inlet, wherein the circulating water pump includes a core circulating water pump and a standby circulating water pump; Determining whether to modify the circulating water pump according to the collected hot air temperature at the air outlet; Corresponding reminders and alarms are issued based on the collected hot air temperature at the air inlet, hot air temperature at the air outlet, and hot air flow at the air inlet.

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