A closed cooling water control method and system based on gas turbine peak shaving operation

Abstract

The application discloses a closed cooling water control method and system based on gas turbine peak regulation operation, relates to the intelligent control technical field, and mainly aims to solve the problems of poor effectiveness and accuracy of the existing closed cooling water control. The method comprises the following steps: obtaining the heat exchange outlet temperature, the heat exchange inlet temperature and the heat exchange duration of a heat exchanger; determining the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and determining the refrigeration parameter of the refrigerating unit based on the heat exchange energy coefficient, wherein the refrigeration parameter is used for representing the opening degree of the refrigeration valve of the refrigerating unit; calling the gas turbine peak regulation check range corresponding to the refrigeration parameter, wherein the gas turbine peak regulation check range is used for representing the maximum peak regulation limit value and the minimum peak regulation limit value of the peak regulation operation of the gas turbine unit when matching the heat exchange duration; and when the peak regulation parameter of the gas turbine unit matches the gas turbine peak regulation check range, driving the refrigerating unit to control the closed state of the refrigeration valve according to the refrigeration parameter.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology, and in particular to a closed-loop cooling water control method and system based on gas turbine peak-shaving operation. Background Technology

[0002] Gas turbines are commonly used in power plants for peak power regulation due to their convenient and flexible start-up and shutdown. Specifically, gas turbines using natural gas as fuel utilize these characteristics to operate in a peak power regulation mode. Generally, gas turbine units need to be coordinated with refrigeration units during peak power regulation to achieve stable power output and thermal efficiency.

[0003] Currently, existing gas turbine units utilize low-pressure steam heat exchangers and refrigeration units for system regulation during peak-shaving operation. However, when gas turbine units are operating during peak-shaving, the steam-water heat exchangers require extended heat exchange periods. In cases of excessive steam supply, relying solely on refrigeration units for high-intensity cooling can negatively impact peak-shaving errors, thereby reducing the effectiveness and accuracy of closed-loop cooling water control. Therefore, a closed-loop cooling water control system based on gas turbine peak-shaving operation is urgently needed to address these issues. Summary of the Invention

[0004] In view of this, the present invention provides a closed-loop cooling water control method and system based on gas turbine peak shaving operation, the main purpose of which is to solve the problems of poor effectiveness and accuracy of existing closed-loop cooling water control.

[0005] According to one aspect of the present invention, a closed-loop cooling water control method based on gas turbine peak-shaving operation is provided, comprising:

[0006] Obtain the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger;

[0007] The heat exchange energy coefficient corresponding to the heat exchange duration is determined based on the heat exchange outlet temperature and the heat exchange inlet temperature, and the refrigeration parameters of the refrigeration unit are determined based on the heat exchange energy coefficient. The refrigeration parameters are used to characterize the opening degree of the refrigeration valve of the refrigeration unit.

[0008] Retrieve the gas turbine peak shaving verification range corresponding to the cooling parameters. The gas turbine peak shaving verification range is used to characterize the maximum and minimum peak shaving limits of the gas turbine unit when matching the heat exchange duration for peak shaving operation.

[0009] When the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the closing state of the refrigeration valve according to the refrigeration parameters.

[0010] According to another aspect of the present invention, a closed-loop chilled water control system based on gas turbine peak-shaving operation is provided, comprising: a heat exchanger, a gas turbine unit, a chiller unit, and a controller.

[0011] The controller is used to acquire the heat exchange outlet temperature, heat exchange inlet temperature and heat exchange duration of the heat exchanger.

[0012] The controller is further configured to determine the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and to determine the refrigeration parameters of the refrigeration unit based on the heat exchange energy coefficient, wherein the refrigeration parameters are used to characterize the opening degree of the refrigeration valve of the refrigeration unit;

[0013] The controller is also used to retrieve the gas turbine peak shaving verification range corresponding to the cooling parameters. The gas turbine peak shaving verification range is used to characterize the maximum peak shaving limit and the minimum peak shaving limit of the gas turbine unit when matching the heat exchange duration.

[0014] The controller is further configured to drive the refrigeration unit to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak shaving parameters of the gas turbine unit match the peak shaving verification range of the gas turbine.

[0015] According to another aspect of the present invention, a storage medium is provided, wherein at least one executable instruction is stored therein, the executable instruction causing a processor to perform an operation corresponding to the above-described closed-loop cooling water control method based on gas turbine peak shaving operation.

[0016] According to another aspect of the present invention, a terminal is provided, comprising: a processor, a memory, a communication interface, and a communication bus, wherein the processor, the memory, and the communication interface communicate with each other through the communication bus;

[0017] The memory is used to store at least one executable instruction, which causes the processor to perform the operation corresponding to the above-described closed-loop cooling water control method based on gas turbine peak shaving operation.

[0018] By employing the above-described technical solutions, the technical solutions provided by the embodiments of the present invention have at least the following advantages:

[0019] This invention provides a closed-loop cooling water control method and system based on gas turbine peak-shaving operation. Compared with existing technologies, this invention obtains the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger; determines the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and determines the refrigeration parameters of the chiller unit based on the heat exchange energy coefficient. The refrigeration parameters characterize the opening degree of the refrigeration valves of the chiller unit; retrieves the gas turbine peak-shaving verification range corresponding to the refrigeration parameters. The gas turbine peak-shaving verification range characterizes the maximum and minimum peak-shaving limits for the gas turbine unit when matching the heat exchange duration; when the peak-shaving parameters of the gas turbine unit match the gas turbine peak-shaving verification range, the chiller unit is driven to control the closing state of the refrigeration valves according to the refrigeration parameters. This achieves control of the refrigeration valve opening of the chiller unit in conjunction with the heat exchange situation during peak-shaving, greatly reducing peak-shaving errors and thus improving the effectiveness and accuracy of closed-loop cooling water control.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1 The diagram shows a flow chart of a closed-loop cooling water control method based on gas turbine peak-shaving operation according to an embodiment of the present invention.

[0023] Figure 2 This diagram illustrates a block diagram of a closed-loop cooling water control system based on gas turbine peak-shaving operation, according to an embodiment of the present invention.

[0024] Figure 3 A schematic diagram of the structure of a terminal provided in an embodiment of the present invention is shown. Detailed Implementation

[0025] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0026] This invention provides a closed-loop cooling water control method based on gas turbine peak-shaving operation, such as... Figure 1 As shown, the method includes:

[0027] 101. Obtain the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger.

[0028] In this embodiment of the invention, the current execution end is a controller that controls the refrigeration unit. It can control the chilled water valve by executing the methods in steps 101-104. At this time, the current execution end can communicate with devices such as the heat exchanger and the refrigeration unit to obtain and process the corresponding data. Specifically, the current execution end first obtains the heat exchange outlet temperature and heat exchange inlet temperature in the heat exchanger, as well as the heat exchange duration.

[0029] It should be noted that the current execution terminal, acting as a controller, forms a gas-fired power generation system with other necessary equipment such as heat exchangers, gas turbine units, and refrigeration units, thereby generating electricity through the combustion of gas. At this time, the output port of the gas turbine unit is connected to the heat exchanger, and the current controller drives the refrigeration unit to input refrigerant into the heat exchanger, thus achieving heat exchange of the material. Furthermore, the current execution terminal acquires the heat exchanger's outlet temperature, inlet temperature, and heat exchange duration in real time. Besides executing the methods in steps 102-104, it can also monitor the above data; this embodiment of the invention does not impose specific limitations.

[0030] 102. Determine the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and determine the refrigeration parameters of the refrigeration unit based on the heat exchange energy coefficient.

[0031] In this embodiment of the invention, the refrigeration parameters are used to characterize the opening degree of the refrigeration valves of the refrigeration unit. Specifically, after determining the heat transfer energy coefficient based on the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration, the current actuator determines the refrigeration parameters of the refrigeration unit, enabling the current actuator to control the valves of the refrigeration unit based on these parameters. The heat transfer energy coefficient characterizes the energy generated by heat exchange in the heat exchanger, and the refrigeration parameters are then determined based on this coefficient. Specifically, the heat transfer energy coefficient can be calculated by combining the heat loss coefficient corresponding to different heat exchange durations.

[0032] It should be noted that the current execution terminal pre-stores heat loss coefficients matched with different heat exchange durations. These heat loss coefficients are configured based on equipment model information, environmental state information, and heat exchange fuel information for different heat exchangers during the heat exchange process. The current execution terminal can configure these coefficients based on the entered information, or it can pre-create a mapping relationship between different equipment model information, different environmental state information, different heat exchange fuel information, and different heat loss coefficients, which can then be retrieved when calculating the heat exchange energy coefficient. Furthermore, different heat exchange energy coefficients in the current execution terminal can determine different refrigeration parameters to match the combustion conditions in the gas turbine unit. For example, over-combustion leads to waste of remaining fuel, while under-combustion fails to generate sufficient exchange energy, thus failing to meet power generation demands. Therefore, in this embodiment of the invention, during peak shaving for the gas turbine, to stabilize the gas turbine's stability, the refrigeration unit is controlled in conjunction with the refrigeration parameters to accelerate or reduce the removal of remaining energy from the gas turbine.

[0033] 103. Retrieve the gas turbine peak shaving verification range corresponding to the refrigeration parameters.

[0034] In this embodiment of the invention, the gas turbine peak-shaving verification range is used to characterize the maximum and minimum peak-shaving limits of the gas turbine unit during peak-shaving operation when matching the heat exchange duration. That is, the maximum and minimum peak-shaving limits are used to determine how the refrigeration unit can stabilize energy output during peak-shaving operation. Therefore, the gas turbine peak-shaving verification range is retrieved to check whether the refrigeration parameters determined during peak-shaving of the gas turbine unit match the specified range. The current execution terminal can collect peak-shaving parameters in real time during peak-shaving operations on the gas turbine unit. Different units may have different peak-shaving operations, resulting in different collected peak-shaving parameters. This embodiment of the invention does not impose specific limitations on this.

[0035] It should be noted that, in the embodiments of the present invention, the peak shaving operation of the gas turbine unit is to regulate the peak load. The peak shaving operation of the gas turbine unit can be achieved by adjusting the rotor speed and the number of start-stop cycles of the gas turbine unit. Peak shaving can be carried out by a peak shaving unit embedded in the gas turbine unit. The embodiments of the present invention do not make specific limitations.

[0036] 104. When the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the closing state of the refrigeration valve according to the refrigeration parameters.

[0037] In this embodiment of the invention, after determining the peak-shaving parameters, the current execution terminal compares them with the gas turbine's peak-shaving verification range to determine whether the peak-shaving parameters are between the maximum and minimum peak-shaving limits. When the peak-shaving parameters match the gas turbine's peak-shaving verification range, the current execution terminal, acting as a controller, drives the chiller unit to control the closing state of the refrigeration valves according to the corresponding refrigeration parameters. The closing state is configured based on different refrigeration valves, which can be either control-open or control-close valves, corresponding to a half-open or half-closed state, or a quarter-open or quarter-closed state. This embodiment of the invention does not impose specific limitations on this.

[0038] In another embodiment of the invention, for further definition and explanation, the step of determining the heat transfer energy coefficient corresponding to the heat transfer duration based on the heat exchange outlet temperature and the heat exchange inlet temperature includes:

[0039] The heat loss coefficient matching the heat exchange duration is retrieved;

[0040] The heat transfer energy coefficient corresponding to the heat exchange outlet temperature, the heat exchange inlet temperature, and the heat loss coefficient is calculated based on the energy heat transfer formula.

[0041] To accurately determine refrigeration parameters based on the heat transfer energy coefficient, and to ensure accurate operation of the command valve opening status during peak shaving, the current execution terminal first retrieves the heat loss coefficient matching the heat exchange duration. Here, the heat exchange duration is directly proportional to the heat loss coefficient, which is configured based on equipment model information, environmental condition information, and heat exchange fuel information for different heat exchangers during the heat exchange process. This embodiment of the invention does not impose specific limitations on this. Furthermore, the current execution terminal calculates the heat transfer energy coefficient based on the energy heat transfer formula.

[0042] The energy heat transfer formula is:

[0043] t1 is the heat exchange outlet temperature, t2 is the heat exchange inlet temperature, and q is the heat loss coefficient.

[0044] In another embodiment of the invention, for further definition and explanation, the step of determining the refrigeration parameters of the refrigeration unit based on the heat transfer energy coefficient includes:

[0045] The refrigeration equipment information of the refrigeration unit is determined, and the refrigeration equipment information and the heat transfer energy coefficient are predicted based on the refrigeration prediction model that has completed model training to obtain refrigeration parameters.

[0046] To improve the accuracy of refrigeration parameter determination and achieve predictive processing based on intelligent algorithms, the current execution terminal pre-trains the constructed refrigeration prediction model using a training sample set based on heat exchange refrigeration mapping data before determining the refrigeration parameters. The network weight parameters of the refrigeration prediction model are configured according to the refrigeration material information and the number of refrigeration units in the refrigeration equipment information. At this time, the current execution terminal pre-constructs an initial network structure for the refrigeration prediction model based on a three-layer convolutional neural network, with network permission parameters configured between each layer. Specifically, the three-layer convolutional neural network contains three network permission parameters, configured according to the refrigeration material information and the number of units. The refrigeration material can include, but is not limited to, refrigerants such as water and Freon, and the number of refrigeration units is the number of refrigeration pipe groups. In specific embodiments, when configuring network permission parameters, the higher the density of the refrigerant and the more groups it has, the larger the second-level permission coefficient. For example, the density of Freon is greater than that of water. With the same number of groups, the network permission parameters are 0.2, 0.4, and 0.4 for water as the refrigerant, and 0.3, 0.5, and 0.2 for Freon as the refrigerant. During configuration, the sum of the three network permission parameters is 1, and the second-level network permission parameter is greater than or equal to the third-level or first-level network permission parameter. This embodiment of the invention does not impose specific limitations.

[0047] It should be noted that the refrigeration equipment information includes refrigeration material information and the number of refrigeration units. Correspondingly, the heat exchange refrigeration mapping data training sample set includes information on multiple refrigeration materials with refrigeration parameters already labeled, the number of units, and the corresponding heat transfer energy coefficient. Model training is then performed based on this heat exchange refrigeration mapping data training sample set. In this embodiment of the invention, manual labeling can be performed based on the calculated heat transfer energy coefficient and the collected refrigeration material information and number of units to construct an effective and accurate heat exchange refrigeration mapping data training sample set. This embodiment of the invention does not impose specific limitations.

[0048] In another embodiment of the invention, for further definition and explanation, the step of retrieving the gas turbine peak-shaving verification range corresponding to the refrigeration parameters includes:

[0049] Retrieve peak-shaving parameters that match the unit information of the current gas turbine unit for peak-shaving operation;

[0050] The gas turbine peak shaving verification range corresponding to the peak shaving parameters and the cooling parameters is determined based on the preset cooling peak shaving mapping relationship.

[0051] To compare peak-shaving parameters based on the gas turbine's peak-shaving verification range, the current execution terminal first retrieves the peak-shaving parameters for the matching unit information to perform peak-shaving operations. Since a gas turbine unit uses hot air and steam obtained from combustion gases to drive a generator, the unit information includes information about the impeller, rotor, and other equipment that drives the generator. Different equipment will affect the corresponding peak-shaving parameters for the peak-shaving operation. Furthermore, since peak-shaving operations on the gas turbine unit can be achieved by adjusting the rotor speed and the number of start-stop cycles, the obtained peak-shaving parameters are the specific values ​​for the rotor speed conditions or the specific number of start-stop cycles. This embodiment of the invention does not impose specific limitations on these parameters.

[0052] It should be noted that after retrieving the peak-shaving parameters, the current execution terminal will determine the specific gas turbine peak-shaving verification range based on the pre-configured preset cooling peak-shaving mapping relationship. This preset cooling peak-shaving mapping relationship includes the gas turbine peak-shaving verification range corresponding to different peak-shaving parameters and different cooling parameters. This can be obtained by technicians pre-entering and configuring the cooling peak-shaving mapping relationship, thereby determining the gas turbine peak-shaving verification range according to the different peak-shaving parameters and different cooling parameters recorded in the mapping relationship. This embodiment of the invention does not impose specific limitations on this.

[0053] In another embodiment of the invention, to further define and illustrate, the step of driving the refrigeration unit to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine includes:

[0054] When the peak-shaving parameter is less than half of the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the refrigeration valve to be adjusted to a half-open or half-closed state according to the refrigeration parameter.

[0055] When the peak-shaving parameter is greater than or equal to half of the gas turbine peak-shaving verification range, the refrigeration unit is driven to control the refrigeration valve to be adjusted to a quarter-open or quarter-closed state according to the refrigeration parameter.

[0056] The method further includes:

[0057] If the peak-shaving parameters do not match the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the refrigeration valves to be fully open or fully closed.

[0058] To achieve optimal and efficient control of the refrigeration valves and ensure the safety of valve opening control, in a specific implementation scenario, when the current actuator drives the refrigeration unit to control the refrigeration valve's closing state according to the refrigeration parameters, it is necessary to determine the matching relationship between the peak-shaving parameters and the gas turbine's peak-shaving calibration range. This is achieved by comparing the parameter with half of the gas turbine's peak-shaving calibration range. If the peak-shaving parameter is less than half of the gas turbine's peak-shaving calibration range, it indicates that the peak-shaving operation results in a higher refrigeration demand for the gas turbine unit. Therefore, assuming valve safety is ensured, the refrigeration valve is driven to a half-open or half-closed state according to the refrigeration parameters (depending on the valve type, such as normally open or normally closed). If the peak-shaving parameter is greater than or equal to half of the gas turbine's peak-shaving calibration range, it indicates that the peak-shaving operation results in a relatively lower refrigeration demand for the gas turbine unit. Therefore, assuming valve safety is ensured, the refrigeration valve is driven to a quarter-open or quarter-closed state according to the refrigeration parameters (depending on the valve type, such as normally open or normally closed).

[0059] It should be noted that, in another specific embodiment, when the peak-shaving parameters do not match the gas turbine peak-shaving verification range, it means that the peak-shaving operation makes the cooling demand of the gas turbine unit very large or very small, suitable for all refrigeration units to perform full cooling or no cooling at all. That is, the peak-shaving operation is not very meaningful relative to the cooling, or the peak-shaving operation is not related to the cooling process. Therefore, the current execution end can drive the refrigeration unit to control the refrigeration valve to be fully open or fully closed. This embodiment of the invention does not make specific limitations.

[0060] In another embodiment of the invention, for further definition and explanation, the steps further include:

[0061] Determine the maximum cooling limit of the refrigeration unit during peak-shaving operation;

[0062] When the maximum cooling limit is greater than or equal to the cooling threshold of the refrigeration unit, the target cooling capacity of the refrigeration unit is determined, and a reference peak-shaving parameter is calculated based on the target cooling capacity to output the reference peak-shaving parameter.

[0063] To ensure the effectiveness of the refrigeration unit during peak shaving and to improve the safety of controlling the refrigeration valves during peak shaving operations, the execution terminal first determines the maximum refrigeration limit of the refrigeration unit during peak shaving operations. This maximum refrigeration limit can be a valve opening pre-configured by technicians; this embodiment of the invention does not specifically limit it. When the maximum refrigeration limit is greater than or equal to the refrigeration threshold of the refrigeration unit, it indicates that the refrigeration unit can refrigerate within the maximum refrigeration limit according to the refrigeration threshold. Therefore, the execution terminal can determine the target refrigeration capacity of the refrigeration unit during peak shaving. This target refrigeration capacity can be determined based on the comparison between the peak shaving parameters and the gas turbine peak shaving calibration range. The determined valve states (half-open, half-closed, fully open, fully closed, etc.) are then used as the target refrigeration capacity. This target refrigeration capacity is used as the basis for calculating reference peak shaving parameters, which are then output to technicians as a reference for peak shaving operations.

[0064] It should be noted that when calculating the reference peak-shaving parameters based on the target cooling capacity, the specific adjustment values ​​for the rotor speed and the number of start-stop cycles of the gas turbine unit can be obtained by reverse calculation based on the valve opening of the specific refrigeration unit. These values ​​can be obtained by sensing sensors. This embodiment of the invention does not impose specific limitations, and the obtained adjustment values ​​are output to the technicians as a reference.

[0065] In another embodiment of the invention, to further define and illustrate, before the step of driving the refrigeration unit to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine, the method further includes:

[0066] Once the target peak-shaving parameter determined by the user is obtained based on the reference peak-shaving parameter, the peak-shaving operation target of the gas turbine unit that performs peak-shaving operation according to the target peak-shaving parameter and the peak-shaving operation parameter are determined.

[0067] The peak-shaving operation object is driven to perform peak-shaving operation according to the peak-shaving operation parameters to obtain the peak-shaving parameters.

[0068] To control the opening and closing of refrigeration valves during peak shaving, the current execution terminal, after outputting reference peak shaving parameters to the user, can modify or confirm these reference parameters to obtain the user-selected target peak shaving parameters. After obtaining the target peak shaving parameters, the current execution terminal determines the peak shaving operation object and the peak shaving operation parameters. At this point, based on a preset mapping relationship, the peak shaving operation object and peak shaving operation parameters corresponding to different target peak shaving parameters can be configured. The peak shaving operation object characterizes the specific operation being performed, such as speed or start / stop. The peak shaving operation parameters characterize the specific values ​​executed by the peak shaving operation object, such as the speed and start / stop time, so that the current execution terminal drives the peak shaving operation object to perform peak shaving operations according to the peak shaving operation parameters to obtain the peak shaving parameters.

[0069] This invention provides a closed-loop cooling water control method based on gas turbine peak-shaving operation. Compared with existing technologies, this invention obtains the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger; determines the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and determines the refrigeration parameters of the chiller unit based on the heat exchange energy coefficient. The refrigeration parameters are used to characterize the opening degree of the refrigeration valves of the chiller unit; retrieves the gas turbine peak-shaving verification range corresponding to the refrigeration parameters. The gas turbine peak-shaving verification range is used to characterize the maximum and minimum peak-shaving limits of the gas turbine unit when matching the heat exchange duration for peak-shaving operation; when the peak-shaving parameters of the gas turbine unit match the gas turbine peak-shaving verification range, the chiller unit is driven to control the closing state of the refrigeration valves according to the refrigeration parameters. This achieves control of the opening degree of the refrigeration valves of the chiller unit in conjunction with the heat exchange situation during the peak-shaving process, greatly reducing peak-shaving errors and thus improving the effectiveness and accuracy of closed-loop cooling water control.

[0070] Furthermore, as a response to the above Figure 1 The implementation of the method shown in this embodiment of the invention provides a closed-loop cooling water control system based on gas turbine peak-shaving operation, such as... Figure 2 As shown, the system includes: a heat exchanger 21, a gas turbine unit 22, a refrigeration unit 23, and a controller 24.

[0071] The controller 24 is used to acquire the heat exchange outlet temperature, heat exchange inlet temperature and heat exchange duration of the heat exchanger 21.

[0072] The controller 24 is also used to determine the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and to determine the refrigeration parameters of the refrigeration unit 23 based on the heat exchange energy coefficient. The refrigeration parameters are used to characterize the opening degree of the refrigeration valve of the refrigeration unit 23.

[0073] The controller 24 is also used to retrieve the gas turbine peak shaving verification range corresponding to the cooling parameters. The gas turbine peak shaving verification range is used to characterize the maximum peak shaving limit and the minimum peak shaving limit of the gas turbine unit 22 when matching the heat exchange duration.

[0074] The controller 24 is also used to drive the refrigeration unit 23 to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak shaving parameters of the gas turbine unit 22 match the peak shaving verification range of the gas turbine.

[0075] This invention provides a closed-loop cooling water control system based on gas turbine peak-shaving operation. Compared with existing technologies, this invention obtains the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger; determines the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and determines the refrigeration parameters of the chiller unit based on the heat exchange energy coefficient. The refrigeration parameters characterize the opening degree of the refrigeration valves of the chiller unit; retrieves the gas turbine peak-shaving verification range corresponding to the refrigeration parameters. The gas turbine peak-shaving verification range characterizes the maximum and minimum peak-shaving limits for the gas turbine unit when matching the heat exchange duration; when the peak-shaving parameters of the gas turbine unit match the gas turbine peak-shaving verification range, the chiller unit is driven to control the closing state of the refrigeration valves according to the refrigeration parameters. This achieves control of the refrigeration valve opening of the chiller unit in conjunction with the heat exchange situation during peak-shaving, greatly reducing peak-shaving errors and thus improving the effectiveness and accuracy of closed-loop cooling water control.

[0076] According to one embodiment of the present invention, a storage medium is provided, the storage medium storing at least one executable instruction, the computer-executable instruction being able to execute the closed-loop cooling water control method based on gas turbine peak shaving operation in any of the above method embodiments.

[0077] Figure 3 The diagram shows a structural schematic of a terminal according to an embodiment of the present invention. The specific implementation of the terminal is not limited by the specific embodiments of the present invention.

[0078] like Figure 3 As shown, the terminal may include: a processor 302, a communications interface 304, a memory 306, and a communications bus 308.

[0079] The processor 302, communication interface 304, and memory 306 communicate with each other via communication bus 308.

[0080] Communication interface 304 is used to communicate with other network elements such as clients or other servers.

[0081] The processor 302 is used to execute program 310, specifically to execute the relevant steps in the above embodiment of the closed-loop cooling water control method based on gas turbine peak shaving operation.

[0082] Specifically, program 310 may include program code that includes computer operation instructions.

[0083] Processor 302 may be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention. The terminal may include one or more processors of the same type, such as one or more CPUs; or it may include processors of different types, such as one or more CPUs and one or more ASICs.

[0084] Memory 306 is used to store program 310. Memory 306 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage device.

[0085] Specifically, program 310 can be used to cause processor 302 to perform the following operations:

[0086] Obtain the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger;

[0087] The heat exchange energy coefficient corresponding to the heat exchange duration is determined based on the heat exchange outlet temperature and the heat exchange inlet temperature, and the refrigeration parameters of the refrigeration unit are determined based on the heat exchange energy coefficient. The refrigeration parameters are used to characterize the opening degree of the refrigeration valve of the refrigeration unit.

[0088] Retrieve the gas turbine peak shaving verification range corresponding to the cooling parameters. The gas turbine peak shaving verification range is used to characterize the maximum and minimum peak shaving limits of the gas turbine unit when matching the heat exchange duration for peak shaving operation.

[0089] When the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the closing state of the refrigeration valve according to the refrigeration parameters.

[0090] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing systems. They can be centralized on a single computing system or distributed across a network of multiple computing systems. Optionally, they can be implemented using program code executable by a computing system, thereby storing them in a storage system for execution by the computing system. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A closed-loop cooling water control method based on gas turbine peak-shaving operation, characterized in that, include: Obtain the heat exchange outlet temperature, heat exchange inlet temperature, and heat exchange duration of the heat exchanger; The heat exchange energy coefficient corresponding to the heat exchange duration is determined based on the heat exchange outlet temperature and the heat exchange inlet temperature, and the refrigeration parameters of the refrigeration unit are determined based on the heat exchange energy coefficient. The refrigeration parameters are used to characterize the opening degree of the refrigeration valve of the refrigeration unit. Retrieve the gas turbine peak shaving verification range corresponding to the cooling parameters. The gas turbine peak shaving verification range is used to characterize the maximum and minimum peak shaving limits of the gas turbine unit when matching the heat exchange duration for peak shaving operation. When the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the closing state of the refrigeration valve according to the refrigeration parameters; The determination of the refrigeration parameters of the refrigeration unit based on the heat transfer energy coefficient includes: The refrigeration equipment information of the refrigeration unit is determined, and the refrigeration equipment information and the heat transfer energy coefficient are predicted according to the refrigeration prediction model that has been trained to obtain refrigeration parameters. The refrigeration prediction model is trained based on the heat transfer refrigeration mapping data training sample set. The network weight parameters of the refrigeration prediction model are configured based on the refrigeration material information in the refrigeration equipment information and the number of refrigeration units.

2. The method according to claim 1, characterized in that, The determination of the heat transfer energy coefficient corresponding to the heat transfer duration based on the heat exchange outlet temperature and the heat exchange inlet temperature includes: The heat loss coefficient matching the heat exchange duration is retrieved. The heat loss coefficient is configured based on the equipment model information, environmental condition information, and heat exchange fuel information of different heat exchangers during the heat exchange process. The heat transfer energy coefficient corresponding to the heat transfer outlet temperature, heat transfer inlet temperature, and heat loss coefficient is calculated based on the energy heat transfer formula. The energy heat transfer formula is as follows: The The heat exchange outlet temperature, the The heat exchange inlet temperature, the This is the heat loss coefficient.

3. The method according to claim 2, characterized in that, The process of retrieving the gas turbine peak-shaving verification range corresponding to the cooling parameters includes: Retrieve peak-shaving parameters that match the unit information of the current gas turbine unit for peak-shaving operation; Based on a preset cooling peak shaving mapping relationship, the gas turbine peak shaving verification range corresponding to the peak shaving parameter and the cooling parameter is determined. The preset cooling peak shaving mapping relationship includes the gas turbine peak shaving verification range corresponding to different peak shaving parameters and different cooling parameters.

4. The method according to claim 3, characterized in that, The step of driving the refrigeration unit to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine includes: When the peak-shaving parameter is less than half of the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the refrigeration valve to be adjusted to a half-open or half-closed state according to the refrigeration parameter. When the peak-shaving parameter is greater than or equal to half of the gas turbine peak-shaving verification range, the refrigeration unit is driven to control the refrigeration valve to be adjusted to a quarter-open or quarter-closed state according to the refrigeration parameter. The method further includes: If the peak-shaving parameters do not match the peak-shaving verification range of the gas turbine, the refrigeration unit is driven to control the refrigeration valve to be fully open or fully closed.

5. The method according to claim 4, characterized in that, The method further includes: Determine the maximum cooling limit of the refrigeration unit during peak-shaving operation; When the maximum cooling limit is greater than or equal to the cooling threshold of the refrigeration unit, the target cooling capacity of the refrigeration unit is determined, and a reference peak-shaving parameter is calculated based on the target cooling capacity to output the reference peak-shaving parameter.

6. The method according to claim 5, characterized in that, Before driving the refrigeration unit to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak-shaving parameters of the gas turbine unit match the peak-shaving verification range of the gas turbine, the method further includes: Once the target peak-shaving parameter determined by the user is obtained based on the reference peak-shaving parameter, the peak-shaving operation target of the gas turbine unit that performs peak-shaving operation according to the target peak-shaving parameter and the peak-shaving operation parameter are determined. The peak-shaving operation object is driven to perform peak-shaving operation according to the peak-shaving operation parameters to obtain the peak-shaving parameters.

7. A closed-loop cooling water control system based on gas turbine peak-shaving operation, characterized in that, include: Heat exchangers, gas turbine units, refrigeration units, controllers, The controller is used to acquire the heat exchange outlet temperature, heat exchange inlet temperature and heat exchange duration of the heat exchanger. The controller is further configured to determine the heat exchange energy coefficient corresponding to the heat exchange duration based on the heat exchange outlet temperature and the heat exchange inlet temperature, and to determine the refrigeration parameters of the refrigeration unit based on the heat exchange energy coefficient, wherein the refrigeration parameters are used to characterize the opening degree of the refrigeration valve of the refrigeration unit; The controller is also used to retrieve the gas turbine peak shaving verification range corresponding to the cooling parameters. The gas turbine peak shaving verification range is used to characterize the maximum peak shaving limit and the minimum peak shaving limit of the gas turbine unit when matching the heat exchange duration. The controller is also configured to drive the refrigeration unit to control the closing state of the refrigeration valve according to the refrigeration parameters when the peak shaving parameters of the gas turbine unit match the peak shaving verification range of the gas turbine. The determination of the refrigeration parameters of the refrigeration unit based on the heat transfer energy coefficient includes: The refrigeration equipment information of the refrigeration unit is determined, and the refrigeration equipment information and the heat transfer energy coefficient are predicted according to the refrigeration prediction model that has been trained to obtain refrigeration parameters. The refrigeration prediction model is trained based on the heat transfer refrigeration mapping data training sample set. The network weight parameters of the refrigeration prediction model are configured based on the refrigeration material information in the refrigeration equipment information and the number of refrigeration units.

8. A storage medium storing at least one executable instruction that causes a processor to perform an operation corresponding to the closed-loop cooling water control method based on gas turbine peak shaving operation as described in any one of claims 1-6.

9. A terminal, comprising: The processor, memory, communication interface, and communication bus are provided, wherein the processor, memory, and communication interface communicate with each other via the communication bus. The memory is used to store at least one executable instruction, which causes the processor to perform the operation corresponding to the closed-loop cooling water control method based on gas turbine peak shaving operation as described in any one of claims 1-6.

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