Unit cold end optimization control system based on real-time twin model

Abstract

This invention relates to the field of cold-end control technology for generator units, and particularly to a cold-end optimized control system for generator units based on a real-time twin model. The system includes a cold-end management platform, a cooling information unit, a performance evaluation unit, an energy-saving evaluation unit, a sequence control unit, a start-stop adjustment unit, and a control response unit. This invention analyzes the system from two perspectives: energy-saving operation and regulation control, to ensure the low-consumption and high-efficiency operation of the generator unit's cold-end equipment and the sensitivity of the cold-end control system. It uses information feedback to perform operational sequence control feedback analysis on state loss data, enabling subsequent reasonable control of the operating sequence of the generator unit's cold-end equipment to ensure the overall stability of the cold-end operation. Simultaneously, it performs detailed evaluation and adjustment of operating temperature data to prevent prolonged use or abnormal operation of any generator unit's cold-end equipment, thus avoiding increased risk of damage and ultimately helping to extend the service life of the generator unit's cold-end.

Description

Technical Field

[0001] This invention relates to the field of cold-end control technology for generator units, and in particular to a cold-end optimized control system for generator units based on a real-time twin model. Background Technology

[0002] Digital twins fully utilize physical models, sensors, operational history, and other data to integrate multi-disciplinary, multi-physical-quantity, multi-scale, and multi-probabilistic simulation processes, completing mapping in virtual space to reflect the entire lifecycle of the corresponding physical equipment. The cold-end control system mainly consists of three parts: sensors, controllers, and actuators. Sensors monitor parameters such as temperature and humidity of the cold-end equipment in real time, while the controller performs logical operations based on sensor signals and issues relevant commands to the actuators to achieve automatic control of the cold-end equipment.

[0003] Cold end control systems are widely used automated control systems that effectively manage and operate cold end equipment by measuring and controlling parameters such as temperature and humidity. However, current technologies cannot effectively monitor the energy efficiency and control status of cold end equipment, which hinders stable control and reduces control efficiency. Furthermore, when using multiple cold end units, the usage time and performance of each unit are not considered, increasing the risk of damage, reducing lifespan, and compromising the overall rationality of cold end control.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a unit cold-end optimized control system based on a real-time twin model to address the aforementioned technical deficiencies. This invention analyzes the issue from two perspectives: energy-saving operation and regulation control, to ensure the low-consumption and high-efficiency operation of the unit's cold-end equipment and the sensitivity of the unit's cold-end control system. It uses information feedback to perform operational sequence control and feedback analysis on state loss data, enabling subsequent rational control of the cold-end equipment's operating sequence to ensure the overall stability of the unit's cold-end operation. Simultaneously, it performs detailed evaluation and regulation of operating temperature data, making rational adjustments based on the operating time and performance of the cold-end equipment. This prevents any unit's cold-end equipment from operating for excessively long periods or exhibiting abnormal performance, thus avoiding increased risk of damage and ultimately helping to extend the service life of the unit's cold-end equipment.

[0006] The objective of this invention can be achieved through the following technical solution: a unit cold-end optimization control system based on a real-time twin model, including a cold-end management platform, a cooling information unit, a performance evaluation unit, an energy-saving evaluation unit, a sequence control unit, a start-stop adjustment unit, and a control response unit;

[0007] The cooling information unit is used to immediately collect the operating status parameters and state loss data of the unit's cold end, and send the operating status parameters and state loss data to the energy-saving assessment unit and the sequence control unit respectively.

[0008] Upon receiving the working status parameters, the energy-saving assessment unit immediately performs energy-saving operation supervision and assessment analysis on the working status parameters, compares and analyzes the obtained energy-saving floating risk index, and obtains management signals and stability signals.

[0009] The performance evaluation unit is used to collect control information at the cold end of the unit, perform sensitivity control monitoring analysis on the control information, compare and analyze the obtained switching evaluation value and management reliability value, and obtain standard signal and optimized signal.

[0010] Upon receiving the state loss data, the sequence control unit immediately performs a sequence control feedback analysis on the state loss data and sends the sorted cooling control evaluation coefficient Tg to the control response unit.

[0011] The start-stop control unit is used to collect the unit's operating temperature data, perform detailed evaluation of the operating temperature data, and send the obtained control signals and replacement signals to the control and response unit.

[0012] Preferably, the energy-saving operation monitoring and evaluation analysis process of the energy-saving assessment unit is as follows:

[0013] A digital twin model of the unit and its cold end is established. The working time period of the cold end of the unit is collected and set as a time threshold. The time is divided into i sub-time periods, where i is a natural number greater than zero. The working status parameters of the cold end of the unit in each sub-time period are obtained. The working status parameters include the average working efficiency and energy consumption. Then, the ratio between the average working efficiency and energy consumption is obtained and set as the energy-saving performance value.

[0014] Next, a rectangular coordinate system is established with the number of sub-times as the X-axis and the energy-saving performance value as the Y-axis. An energy-saving performance value curve is plotted by plotting points. The number of plotted points below the preset energy-saving performance value threshold curve is then obtained and set as the deviation value n, where n∈i. The ratio between n and i is then obtained and set as the energy-saving fluctuation risk index. This energy-saving fluctuation risk index is then compared and analyzed with the preset energy-saving fluctuation risk index threshold stored internally.

[0015] If the ratio between the energy-saving floating risk index and the preset energy-saving floating risk index threshold is less than 1, a stable signal is generated.

[0016] If the ratio between the energy-saving floating risk index and the preset energy-saving floating risk index threshold is greater than or equal to 1, a management signal is generated.

[0017] Preferably, the sensitivity control and monitoring analysis process of the performance evaluation unit is as follows:

[0018] The control information of the unit's cold end within the time threshold is obtained. The control information includes the switching evaluation value and the management reliability value. The switching evaluation value and the management reliability value are compared and analyzed with the preset switching evaluation value and management reliability value thresholds that are recorded and stored internally.

[0019] If the switching evaluation value is less than the preset switching evaluation value threshold and the management reliability value is greater than the preset management reliability value threshold, then a standard signal is generated;

[0020] If the switching evaluation value is greater than or equal to the preset switching evaluation value threshold, or the management reliability value is less than or equal to the preset management reliability value threshold, then an optimization signal is generated.

[0021] Preferably, the switching evaluation value represents the difference between the maximum and minimum values ​​of the interval between the shutdown time of one unit's cold end equipment and the opening time of another unit's cold end equipment; the management reliability value represents the value obtained by dividing the optimization frequency of the unit's cold end equipment control system by the average value of the optimization interval after data normalization processing.

[0022] Preferably, the operation sequence control feedback analysis process of the sequence control unit is as follows:

[0023] The energy-saving performance values ​​of the cold-end equipment of each unit within a time threshold are obtained, along with the state-of-the-art loss data of the cold-end equipment within the same time threshold. This state-of-the-art loss data includes operational and management information. The energy-saving performance values, operational evaluation values, and damage assessment indices are labeled JB, GP, and SP, respectively. The energy-saving performance value JB, operational evaluation value GP, and damage assessment index SP are then substituted into the formula. The cooling control evaluation coefficient is obtained, where v1 is the preset error correction factor coefficient, v1 is greater than zero, T is the cooling control evaluation coefficient, the cold end equipment of the unit is set as g, g is a natural number greater than 1, and then the cooling control evaluation coefficient Tg of each unit's cold end equipment is obtained, and the cooling control evaluation coefficient Tg is sorted in descending order.

[0024] Preferably, the operation information includes operation duration, load operation duration, and number of failures. The operation duration represents the total duration of operation between the time the unit's cold end equipment is put into use and the current time. The value obtained by multiplying the values ​​corresponding to the operation duration, load operation duration, and number of failures is set as the work evaluation value. The management information includes operation and maintenance evaluation value and environmental impact value. The value obtained by multiplying the values ​​corresponding to the operation and maintenance evaluation value and the environmental impact value is set as the damage assessment index. The operation and maintenance evaluation value represents the sum of the values ​​corresponding to the total number of parts replacements and the total number of operations and maintenance for the unit's cold end equipment. The environmental impact value represents the total duration corresponding to the environmental parameter values ​​exceeding a preset threshold. The environmental parameters include dust concentration value and humidity value.

[0025] Preferably, the detailed evaluation process for the operation control of the start-stop adjustment unit is as follows:

[0026] The system obtains the time period of temperature change of the unit within a time threshold, and then obtains the operating temperature data of the unit within the time period of temperature change. The operating temperature data includes the maximum and minimum operating temperature values. An interval A is constructed based on the maximum and minimum operating temperature values, and discriminant analysis is performed on interval A.

[0027] If interval A is included within the preset operating temperature range, a feedback command is generated.

[0028] If interval A is not included in the preset operating temperature range, a control signal will be generated.

[0029] Preferably, when the start / stop adjustment unit generates a feedback command:

[0030] The cold end equipment of the operating unit is obtained when the interval A is included in the preset operating temperature range, and it is set as the operating cold end equipment. Then, the running time of each operating cold end equipment is obtained. The running time represents the time between the start time and the current time. At the same time, the operating performance index of each operating cold end equipment is obtained.

[0031] The performance index and runtime are compared and analyzed with the preset performance index threshold and preset runtime threshold stored internally:

[0032] If the performance index is less than the preset performance index threshold and the running time is less than the preset running time threshold, no signal is generated; if the performance index is greater than or equal to the preset performance index threshold, or the running time is greater than or equal to the preset running time threshold, a replacement signal is generated.

[0033] The performance index represents the overlap between the duration for which the operating vibration amplitude of the cold-end equipment exceeds the preset operating vibration amplitude and the duration for which the abnormal noise value exceeds the preset abnormal noise value.

[0034] The beneficial effects of this invention are as follows:

[0035] (1) This invention analyzes the energy-saving operation and regulation control from two aspects to ensure the low-consumption and high-efficiency operation of the cold end equipment of the unit and the sensitivity of the cold end control system of the unit. That is, optimizing the maintenance and management of the cold end equipment of the unit with high energy consumption and low working efficiency helps to achieve the effect of energy-saving operation. Sensitive regulation and monitoring analysis of the regulation information is carried out to understand the optimization needs of the cold end control system of the unit and improve the regulation sensitivity of the cold end control system of the unit.

[0036] (2) This invention performs operational sequence control feedback analysis on state loss data through information feedback, so as to reasonably control the operation sequence of the cold end equipment of the unit in the future, so as to ensure the stability of the cold end operation of the entire unit. At the same time, it performs detailed evaluation of operation temperature data and makes reasonable adjustments based on the running time and performance of the cold end equipment, so as to avoid the cold end equipment of the unit from being used for too long or operating abnormally, which would increase the risk of damage to the cold end equipment of the unit and thus help to improve the service life of the cold end of the unit. Attached Figure Description

[0037] The invention will now be further described with reference to the accompanying drawings;

[0038] Figure 1 This is a flowchart of the system of the present invention;

[0039] Figure 2 This is a partial analysis diagram of Embodiment 1 of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1:

[0042] Please see Figures 1 to 2As shown, the present invention is a unit cold-end optimization control system based on a real-time twin model, including a cold-end management platform, a cooling information unit, a performance evaluation unit, an energy-saving evaluation unit, a sequence control unit, a start-stop adjustment unit, and a control response unit. The cold-end management platform has a one-way communication connection with the cooling information unit and the performance evaluation unit. The cooling information unit has a one-way communication connection with the energy-saving evaluation unit and the sequence control unit. The energy-saving evaluation unit has a one-way communication connection with the sequence control unit and the control response unit. The performance evaluation unit has a one-way communication connection with the sequence control unit. The sequence control unit has a one-way communication connection with the start-stop adjustment unit and the control response unit. The start-stop adjustment unit has a one-way communication connection with the control response unit.

[0043] When the cold-end management platform detects that any unit's cold end is operating, it generates a monitoring command and sends it to the cooling information unit and performance evaluation unit. Upon receiving the monitoring command, the cooling information unit immediately collects the operating status parameters and state loss data of the unit's cold end and sends these data to the energy-saving evaluation unit and sequence control unit, respectively. Upon receiving the operating status parameters, the energy-saving evaluation unit immediately performs energy-saving operation monitoring and evaluation analysis to optimize the maintenance and management of cold-end equipment with high energy consumption and low operating efficiency, ensuring low-energy consumption and high-efficiency operation of the unit's cold-end equipment. The specific energy-saving operation monitoring and evaluation analysis process is as follows:

[0044] A digital twin model of the generating unit and its cold end is established. The working time period of the cold end is collected and set as a time threshold. The time is divided into i sub-time periods, where i is a natural number greater than zero. The working status parameters of the cold end of the unit in each sub-time period are obtained. The working status parameters include the average working efficiency and energy consumption. Then, the ratio between the average working efficiency and energy consumption is obtained and set as the energy-saving performance value. It should be noted that the analysis is conducted from the perspective of energy-saving operation to understand the energy-saving operation of each unit's cold end equipment.

[0045] A rectangular coordinate system is established with the number of sub-times as the X-axis and the energy-saving performance value as the Y-axis. An energy-saving performance value curve is plotted by drawing points. The number of plotted points below the preset energy-saving performance value threshold curve is then obtained and set as the deviation value n, where n∈i. The ratio between n and i is then obtained and set as the energy-saving fluctuation risk index. The energy-saving fluctuation risk index is then compared and analyzed with its internally entered and stored preset energy-saving fluctuation risk index threshold.

[0046] If the ratio between the energy-saving floating risk index and the preset energy-saving floating risk index threshold is less than 1, a stable signal is generated and sent to the sequence control unit and the start-stop adjustment unit.

[0047] If the ratio between the energy-saving floating risk index and the preset energy-saving floating risk index threshold is greater than or equal to 1, a management signal is generated. The management signal and the stability signal are then sent to the control and response unit via the start-stop adjustment unit. Upon receiving the management signal and the stability signal, the control and response unit immediately marks the cold end equipment of the unit in the digital twin model corresponding to the management signal as red and the cold end equipment of the unit in the digital twin model corresponding to the stability signal as green. This is to optimize the maintenance and management of the cold end equipment of the unit with high energy consumption and low working efficiency, so as to ensure the low-consumption and high-efficiency working efficiency of the cold end equipment of the unit, thereby helping to achieve the effect of energy saving.

[0048] In this embodiment of the invention, a digital twin model can be used to simulate the operation of the cold end of the unit under different operating conditions, so that the cold end of the unit can achieve more intelligent, efficient and reliable operation. Based on the digital twin model of the cold end of the unit, it is easier for operators to operate and control the cold end of the unit.

[0049] The performance evaluation unit is used to respond to regulatory instructions, collect control information from the cold end of the unit, and perform sensitivity control monitoring analysis on the control information to understand the optimization needs of the unit's cold end control system. This allows for timely feedback management to improve the sensitivity and smoothness of the unit's cold end control system. The specific sensitivity control monitoring analysis process is as follows:

[0050] The control information of the unit's cold end within the time threshold is obtained. The control information includes the switching evaluation value and the management reliability value. The switching evaluation value and the management reliability value are compared and analyzed with the preset switching evaluation value and management reliability value thresholds that are recorded and stored internally.

[0051] If the switching evaluation value is less than the preset switching evaluation value threshold and the management reliability value is greater than the preset management reliability value threshold, a standard signal is generated and sent to the sequence control unit and the start-stop adjustment unit.

[0052] If the switching evaluation value is greater than or equal to the preset switching evaluation value threshold, or the management reliability value is less than or equal to the preset management reliability value threshold, an optimization signal is generated and sent to the control and response unit. After receiving the optimization signal, the control and response unit immediately displays the preset warning text corresponding to the optimization signal so as to upgrade and optimize the entire unit's cold end control system to improve the sensitivity and smoothness of the unit's cold end control system.

[0053] In this embodiment of the invention, the switching evaluation value represents the difference between the maximum and minimum values ​​of the interval between the shutdown time of one unit's cold end equipment and the opening time of another unit's cold end equipment. It should be noted that the switching evaluation value is an influencing parameter that reflects the sensitivity and smoothness of the unit's cold end control system.

[0054] In this embodiment of the invention, the management reliability value represents the value obtained by dividing the average value of the optimization frequency and the optimization interval duration of the unit's cold end equipment control system after data normalization. It should be noted that the larger the management reliability value, the greater the difficulty in controlling the unit's cold end equipment control system.

[0055] Example 2:

[0056] After receiving the state loss data, the sequence control unit immediately performs operation sequence control feedback analysis on the state loss data to obtain the sorted cooling control evaluation coefficient Tg, so as to reasonably control the operation sequence of the unit's cold end equipment and help achieve the effect of energy-saving cooling.

[0057] In this embodiment of the invention, the specific process of execution sequence control feedback analysis is as follows:

[0058] The energy-saving performance values ​​of the cold-end equipment of each unit within a time threshold are obtained, along with the state-of-the-art loss data of the cold-end equipment within the same time threshold. This state-of-the-art loss data includes operational and management information. The energy-saving performance values, operational evaluation values, and damage assessment indices are labeled JB, GP, and SP, respectively. The energy-saving performance value JB, operational evaluation value GP, and damage assessment index SP are then substituted into the formula. The cooling control evaluation coefficient is obtained, where v1 is the preset error correction factor coefficient, v1 is greater than zero, T is the cooling control evaluation coefficient, the unit cold end equipment is set as g, g is a natural number greater than 1, and then the cooling control evaluation coefficient Tg of each unit cold end equipment is obtained. The cooling control evaluation coefficient Tg is sorted in descending order, and the sorted cooling control evaluation coefficient Tg is sent to the control response unit.

[0059] In this embodiment of the invention, after receiving the sorted cooling control evaluation coefficient Tg, the control response unit immediately obtains the sorting number corresponding to the cold end equipment of each unit and marks it in the digital twin model so as to reasonably control the operating sequence of the cold end equipment of the unit in the future, which helps to achieve the effect of energy-saving cooling.

[0060] In this embodiment of the invention, the operation information includes operation duration, load operation duration, and number of failures. The operation duration represents the total duration of the operation segment between the time when the unit's cold end equipment is put into use and the current time. The value obtained by multiplying the values ​​corresponding to the operation duration, load operation duration, and number of failures is set as the work evaluation value. It should be noted that the status of the unit's cold end equipment is analyzed from the perspective of operation information in order to provide data support for the selection and operation of the unit's cold end equipment in the future.

[0061] In this embodiment of the invention, the management information includes operation and maintenance assessment value and environmental impact value. The value obtained by multiplying the corresponding values ​​of the operation and maintenance assessment value and the environmental impact value is set as the damage assessment index. The operation and maintenance assessment value represents the sum of the values ​​corresponding to the total number of parts replacements and the total number of operations and maintenance of the unit's cold end equipment. The environmental impact value represents the total duration corresponding to the environmental parameter values ​​exceeding the preset threshold. Environmental parameters include dust concentration value, humidity value, etc. It should be noted that the status of the unit's cold end equipment is analyzed from the perspective of management information in order to reasonably control the operation sequence of the unit's cold end equipment.

[0062] When stable and standard signals are generated, the start-stop control unit collects the unit's operating temperature data and performs detailed operational control evaluation based on this data. It makes rational adjustments based on the operating time and performance of the cold-end equipment to prevent prolonged use or abnormal operation of any unit's cold-end equipment, which could exacerbate the risk of damage. The specific detailed operational control evaluation process is as follows:

[0063] The system obtains the time period of temperature change of the unit within a time threshold, and then obtains the operating temperature data of the unit within the time period of temperature change. The operating temperature data includes the maximum and minimum operating temperature values. An interval A is constructed based on the maximum and minimum operating temperature values, and discriminant analysis is performed on interval A.

[0064] If interval A is included within the preset operating temperature range, a feedback command is generated.

[0065] If the interval A is not included in the preset operating temperature range, a control signal is generated and sent to the control response unit. After receiving the control signal, the control response unit immediately controls the number of cold end devices of the unit to avoid the unit operating temperature being too high or too low, which helps the unit to operate stably and extend its service life.

[0066] When a feedback instruction is generated, the corresponding cold end equipment of the operating unit is obtained when the interval A is included in the preset operating temperature value range, and it is set as the operating cold end equipment. Then, the running time of each operating cold end equipment is obtained. The running time represents the time between the start time and the current time. At the same time, the operating performance index of each operating cold end equipment is obtained.

[0067] In this embodiment of the invention, the operating performance index represents the overlap between the duration of the operating vibration amplitude of the cold end equipment exceeding the preset operating vibration amplitude and the duration of the abnormal noise value exceeding the preset abnormal noise value. It should be noted that reasonable start-up and shutdown control of the cold end equipment is carried out based on the actual operating performance. That is, reasonable adjustments are made according to the operating time and operating performance of the cold end equipment to avoid the cold end equipment of a certain unit being used for too long or operating abnormally, which would increase the risk of damage to the cold end equipment of the unit and thus help improve the overall reliability of the cold end equipment of the unit.

[0068] In this embodiment of the invention, the performance index and runtime are compared and analyzed with preset performance index thresholds and preset runtime thresholds that are internally entered and stored:

[0069] If the performance index is less than the preset performance index threshold and the runtime is less than the preset runtime threshold, no signal will be generated.

[0070] If the operating performance index is greater than or equal to the preset operating performance index threshold, or the operating time is greater than or equal to the preset operating time threshold, a replacement signal is generated and sent to the control and response unit. After receiving the replacement signal, the control and response unit obtains the operating cold end equipment corresponding to the replacement signal and shuts it down. At the same time, based on the sorted cooling control evaluation coefficient Tg corresponding to the sorted operating cold end equipment, the unit opens the operating cold end equipment after the sorted number. This prevents a unit's cold end equipment from being used for too long or operating abnormally and still running, which would increase the risk of damage to the unit's cold end equipment and thus help improve the overall reliability of the unit's cold end equipment.

[0071] In summary, this invention analyzes the issue from two perspectives: energy-saving operation and regulation control. This ensures the low-energy-consumption and high-efficiency operation of the unit's cold-end equipment and the sensitivity of the cold-end control system. Specifically, it optimizes the maintenance and management of energy-intensive and inefficient cold-end equipment to achieve energy-saving operation. Sensitive regulation and monitoring analysis of control information helps understand the optimization needs of the cold-end control system, improving its responsiveness. Furthermore, it uses information feedback to analyze and manage the operational sequence of state loss data, enabling subsequent rational control of the cold-end equipment's operating sequence to ensure overall cold-end operational stability. Simultaneously, it refines and evaluates operational temperature data, making rational adjustments based on the operating time and performance of the cold-end equipment. This prevents prolonged use or abnormal operation of any cold-end equipment, which could exacerbate damage risks and ultimately extend the lifespan of the cold-end equipment.

[0072] The threshold is set to facilitate comparison. The size of the threshold depends on the amount of sample data and the number of bases set by those skilled in the art for each set of sample data; as long as it does not affect the ratio between the parameter and the quantized value, it is acceptable.

[0073] The above formulas are all derived from software simulation using a large amount of data and are selected to be close to the actual values. The coefficients in the formulas are set by those skilled in the art according to the actual situation. The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A unit cold-end optimal control system based on real-time twin model, characterized in that, It includes a cooling information unit, a performance evaluation unit, an energy-saving evaluation unit, a sequence control unit, a start-stop adjustment unit, and a control response unit; The cooling information unit is used to collect the operating status parameters and state loss data of the cold end of the unit, and send the operating status parameters and state loss data to the energy-saving assessment unit and the sequence control unit respectively. After receiving the working status parameters, the energy-saving assessment unit performs energy-saving operation supervision and assessment analysis on the working status parameters, compares and analyzes the obtained energy-saving floating risk index, and obtains management signals and stability signals. The performance evaluation unit is used to collect control information at the cold end of the unit, perform sensitivity control monitoring analysis on the control information, compare and analyze the obtained switching evaluation value and management reliability value, and obtain standard signal and optimized signal. After receiving the state loss data, the sequence control unit performs operation sequence control feedback analysis on the state loss data and sends the sorted cooling control evaluation coefficient Tg to the control response unit. The start-stop regulation unit is used to collect the unit's operating temperature data, perform detailed evaluation of the operating temperature data, and send the obtained regulation signals and replacement signals to the control and response unit. The control and response unit performs control processing based on the regulation signals and replacement signals. The energy-saving assessment unit includes an energy-saving operation monitoring, assessment, and analysis process, as detailed below: A digital twin model of the unit and its cold end is established. The working time period of the cold end of the unit is collected and set as a time threshold. The time is divided into i sub-time periods, where i is a natural number greater than zero. The working status parameters of the cold end of the unit in each sub-time period are obtained. The working status parameters include the average working efficiency and energy consumption. Then, the ratio between the average working efficiency and energy consumption is obtained and set as the energy-saving performance value. Next, a rectangular coordinate system is established with the number of sub-times as the X-axis and the energy-saving performance value as the Y-axis. An energy-saving performance value curve is plotted by plotting points. The number of plotted points below the preset energy-saving performance value threshold curve is then obtained and set as the deviation value n, where n∈i. The ratio between n and i is then obtained and set as the energy-saving fluctuation risk index. This energy-saving fluctuation risk index is then compared and analyzed with the preset energy-saving fluctuation risk index threshold stored internally. If the ratio between the energy-saving floating risk index and the preset energy-saving floating risk index threshold is less than 1, a stable signal is generated. If the ratio between the energy-saving floating risk index and the preset energy-saving floating risk index threshold is greater than or equal to 1, a management signal is generated. The performance evaluation unit includes a sensitivity control and regulatory analysis process, as detailed below: The control information of the unit's cold end within the time threshold is obtained. The control information includes the switching evaluation value and the management reliability value. The switching evaluation value and the management reliability value are compared and analyzed with the preset switching evaluation value and management reliability value thresholds that are recorded and stored internally. If the switching evaluation value is less than the preset switching evaluation value threshold and the management reliability value is greater than the preset management reliability value threshold, then a standard signal is generated; If the switching evaluation value is greater than or equal to the preset switching evaluation value threshold, or the management reliability value is less than or equal to the preset management reliability value threshold, then an optimization signal is generated; The sequence control unit includes a sequence control feedback analysis process, as detailed below: The energy-saving performance value of each unit cold end equipment within a time threshold is obtained, and state loss data of each unit cold end equipment within the time threshold is obtained, the state loss data including operation information and management information. The energy-saving performance value, the work evaluation value and the damage evaluation index are respectively labeled as JB, GP and SP. The energy-saving performance value JB, the work evaluation value GP and the damage evaluation index SP are substituted into the formula The cooling control evaluation coefficient is obtained, wherein v1 is a preset error correction factor coefficient, v1 is greater than zero, T is the cooling control evaluation coefficient, the unit cold end equipment is set as g, g is a natural number greater than 1, and then the cooling control evaluation coefficient Tg of each unit cold end equipment is obtained. The cooling control evaluation coefficients Tg are sorted in descending order. The start-stop adjustment unit includes a detailed evaluation process for operation control, as detailed below: The system obtains the time period of temperature change of the unit within a time threshold, and then obtains the operating temperature data of the unit within the time period of temperature change. The operating temperature data includes the maximum and minimum operating temperature values. An interval A is constructed based on the maximum and minimum operating temperature values, and discriminant analysis is performed on interval A. If interval A is included within the preset operating temperature range, a feedback command is generated. If interval A is not included in the preset operating temperature range, a control signal will be generated.

2. The unit cold-end optimization control system based on a real-time twin model according to claim 1, characterized in that, The switching evaluation value represents the difference between the maximum and minimum values ​​of the interval between the shutdown time of one unit's cold end equipment and the opening time of another unit's cold end equipment; the management reliability value represents the value obtained by dividing the optimization frequency of the unit's cold end equipment control system by the average value of the optimization interval after data normalization.

3. The unit cold-end optimization control system based on a real-time twin model according to claim 1, characterized in that, The operational information includes operating time, load operating time, and number of failures. Operating time represents the total operating time of the cold-end equipment from the moment it is put into use to the current moment. The value obtained by multiplying the operating time, load operating time, and number of failures is set as the work evaluation value. The management information includes maintenance evaluation value and environmental impact value. The value obtained by multiplying the maintenance evaluation value and environmental impact value is set as the damage assessment index. The maintenance evaluation value represents the sum of the total number of parts replacements and the total number of maintenance operations for the cold-end equipment. The environmental impact value represents the total time for environmental parameters to exceed preset thresholds. Environmental parameters include dust concentration and humidity.

4. The unit cold-end optimization control system based on a real-time twin model according to claim 1, characterized in that, When the start / stop adjustment unit generates a feedback command: The cold end equipment of the operating unit is obtained when the interval A is included in the preset operating temperature range, and it is set as the operating cold end equipment. Then, the running time of each operating cold end equipment is obtained. The running time represents the time between the start time and the current time. At the same time, the operating performance index of each operating cold end equipment is obtained. The performance index and runtime are compared and analyzed with the preset performance index thresholds and preset runtime thresholds stored internally. If the performance index is less than the preset performance index threshold and the running time is less than the preset running time threshold, no signal is generated; if the performance index is greater than or equal to the preset performance index threshold, or the running time is greater than or equal to the preset running time threshold, a replacement signal is generated. The performance index represents the overlap between the duration for which the operating vibration amplitude of the cold-end equipment exceeds the preset operating vibration amplitude and the duration for which the abnormal noise value exceeds the preset abnormal noise value.

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