A compressor control method and device based on compressor outlet temperature, electronic equipment and storage medium

Abstract

The application discloses a compressor control method and device based on compressor outlet temperature, electronic equipment and storage medium, comprising: determining the compressed air mass flow of the compressor according to the compressor operating parameters and compressor attribute parameters of the compressor in the current period; determining the maximum heat exchange capacity of the heat exchange medium according to the heat exchange medium attribute parameters and the maximum mass flow in the heat exchanger; determining the highest inlet temperature of the heat exchanger according to the compressed air mass flow and the maximum heat exchange capacity of the heat exchange medium, and predicting the maximum allowable temperature of the compressor outlet according to the highest inlet temperature of the heat exchanger; obtaining the current outlet temperature of the compressor and the target control parameter of the last period, and determining the target control parameter of the current period according to the current outlet temperature, the maximum allowable temperature and the target control parameter of the last period, so as to control the compressor to work according to the target control parameter of the current period. The method controls the compressor to work based on the target control parameter, and reduces the outlet temperature of the compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air energy storage, and in particular to a compressor control method and device based on compressor outlet temperature, an electronic device and a storage medium. BACKGROUND

[0002] In the energy storage stage of compressed air energy storage, the potential energy and thermal energy of air are stored in a gas storage device and a heat storage device, respectively, by a compressor. Generally, a heat exchanger is arranged on the outlet process pipeline of the compressor, and the heat exchanger is used to collect and store the heat of the compressed air of the compressor in the heat storage device in the energy storage stage.

[0003] At present, in compressed air energy storage, the working states of the compressor and the heat exchanger are controlled separately. The temperature of the heat exchange medium in the heat exchanger is adjusted following the outlet temperature of the compressor. However, when the working state of the compressor changes, or when the outlet temperature of the compressor is too high due to a high external environment temperature, the above-mentioned adjustment method may cause the temperature of the compressed gas in the heat exchanger to exceed the maximum temperature limit of the heat exchanger or the heat exchange medium, or cause the temperature of the heat exchange medium to exceed the storage requirement of the heat storage device. SUMMARY

[0004] The present application provides a compressor control method and device based on compressor outlet temperature, an electronic device and a storage medium, which predict the maximum allowable temperature of the compressor outlet based on the operating parameters and attribute parameters of the compressor, the heat exchanger and the heat exchange medium matched with the compressor, and determine the target control parameter based on the maximum allowable temperature, so as to control the compressor to work according to the target control parameter of the current cycle, and ensure the safe operation of the compressed air energy storage system of the compressor.

[0005] According to an aspect of the present application, a compressor control method based on compressor outlet temperature is provided, and the compressor is connected with a heat exchanger pipeline. The method comprises the following steps:

[0006] determining the compressed air mass flow of the compressor according to the compressor operating parameters and the compressor attribute parameters of the compressor in the current cycle;

[0007] determining the maximum heat exchange amount of the heat exchange medium according to the heat exchange medium attribute parameters and the maximum mass flow of the heat exchanger;

[0008] determining the highest inlet temperature of the heat exchanger according to the compressed air mass flow and the maximum heat exchange amount of the heat exchange medium, and predicting the maximum allowable temperature of the compressor outlet according to the highest inlet temperature of the heat exchanger;

[0009] The compressor's current outlet temperature and the target control parameters of the previous cycle are obtained. Based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle, the target control parameters of the current cycle are determined, so as to control the compressor to work according to the target control parameters of the current cycle.

[0010] According to another aspect of the present invention, a compressor control device based on compressor outlet temperature is provided, wherein the compressor is connected to a heat exchanger pipe, the device comprising:

[0011] The flow rate determination module is used to determine the compressed air mass flow rate of the compressor based on the compressor operating parameters and compressor attribute parameters in the current cycle.

[0012] The heat exchange capacity determination module is used to determine the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger.

[0013] The prediction module is used to determine the maximum inlet temperature of the heat exchanger based on the compressed air mass flow rate and the maximum heat exchange capacity of the heat exchange medium, and to predict the maximum allowable outlet temperature of the compressor based on the maximum inlet temperature of the heat exchanger.

[0014] The control module is used to acquire the current outlet temperature of the compressor and the target control parameters of the previous cycle, and determine the target control parameters of the current cycle based on the current outlet temperature, the maximum allowable temperature and the target control parameters of the previous cycle, so as to control the compressor to work according to the target control parameters of the current cycle.

[0015] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0016] At least one processor; and

[0017] A memory communicatively connected to the at least one processor; wherein,

[0018] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the compressor control method based on compressor outlet temperature according to any embodiment of the present invention.

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the compressor control method based on compressor outlet temperature as described in any embodiment of the present invention.

[0020] This invention provides a compressor control method based on compressor outlet temperature. The method determines the compressed air mass flow rate of the compressor based on the compressor's operating parameters and attribute parameters in the current cycle; determines the maximum heat exchange capacity of the heat exchange medium based on its attribute parameters and maximum mass flow rate; determines the highest inlet temperature of the heat exchanger based on the compressed air mass flow rate and the maximum heat exchange capacity of the heat exchange medium; and predicts the maximum allowable outlet temperature of the compressor based on the highest inlet temperature of the heat exchanger. The method also obtains the current outlet temperature of the compressor and the target control parameters of the previous cycle, and determines the target control parameters for the current cycle based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle, thereby controlling the compressor operation according to the target control parameters for the current cycle. In this technical solution, on the one hand, the maximum heat exchange capacity of the heat exchange medium is determined based on its attribute parameters and the process piping or rated maximum parameters related to the heat exchange medium, thus realizing the determination of the maximum heat exchange capacity of the heat exchange medium in the current cycle. On the other hand, based on the maximum heat exchange capacity of the heat exchange medium in the current cycle and the current compressed air flow rate, the highest inlet temperature that the heat exchanger can withstand under the operating conditions of the current cycle is inferred. Furthermore, by predicting the maximum allowable compressor outlet temperature based on the heat exchanger's maximum inlet temperature, a reverse prediction of the compressor's maximum allowable outlet temperature based on the heat exchanger's maximum inlet temperature is achieved. That is, by working backward from the maximum heat exchange medium's heat exchanger capacity to the heat exchanger's maximum inlet temperature, and then backward to the compressor's maximum inlet temperature, the ultimate outlet temperature of the compressor under current operating conditions is predicted. This ultimate outlet temperature is the limit temperature that ensures the operation of subsequent energy storage processes or devices will not be affected by excessively high compressor outlet temperatures. Finally, by determining the temperature deviation value for the current cycle based on the current compressor outlet temperature and the maximum allowable temperature, and based on this temperature deviation value and the compressor control in the previous cycle, the control parameters that should be controlled on the compressor in the current cycle are directly determined. This automatically reduces the compressor's operating load temperature to prevent subsequent compressed air energy storage processes from being affected by high compressor outlet temperatures, ensuring the safe operation of the compressor-air energy storage system.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic flowchart of a compressor control method based on compressor outlet temperature provided by the present invention;

[0024] Figure 2 A process structure example diagram of the compressed air energy storage system provided in the embodiments of the present invention;

[0025] Figure 3 A schematic flowchart of another compressor control method based on compressor outlet temperature provided in an embodiment of the present invention;

[0026] Figure 4 A schematic diagram of a compressor control device based on compressor outlet temperature provided in an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "current," "target," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] Figure 1This is a flowchart illustrating a compressor control method based on compressor outlet temperature provided by the present invention. This embodiment is applicable to situations where the compressor outlet temperature is controlled to meet the maximum heat tolerance of the heat exchanger, heat exchange medium, and heat storage device. The method can be executed by a compressor control device based on compressor outlet temperature, which can be implemented in hardware and / or software and can be configured in electronic equipment. In this embodiment, the electronic equipment can be a computer or server in an air energy storage system.

[0031] In the introduction Figure 1 Before introducing the compressor control method based on compressor outlet temperature, let me briefly introduce the compressed air energy storage system involved in this invention. Figure 2 This is an example diagram illustrating the process structure of a compressed air energy storage system provided in an embodiment of the present invention. Figure 2 As shown, during the overall operation of the compressed air energy storage system, taking one section of the unit as an example, the motor 10 drives the compressor 20 to compress the air at the inlet or the air processed by the previous section of the unit and cooled by the cooler 30. Electrical energy can be converted into potential energy and thermal energy through compressed air. In this embodiment, the focus is mainly on the thermal energy converted from compressed air by the compressor. During the operation of the compressor 20, if surge occurs, the anti-surge valve 50 needs to be used for venting or backflow operation to ensure that the compressor 20 is in normal working condition. After the compressor 20 converts air into thermal energy, it transfers the thermal energy to the heat exchanger 40 through process pipelines, where the heat exchange medium recovers the thermal energy. The heat exchange medium can flow in and out through the heat exchange medium side of the heat exchanger 40 (as shown in the diagram, the loop on the right side of the heat exchanger 40, where the dotted line represents the pipeline that passes through other unit sections or the pipeline that passes through the thermal storage device). Furthermore, a regulating valve 60 is also provided in the heat exchange medium circuit on the heat exchange medium side to regulate the flow rate of the heat exchange medium. The compressor outlet temperature determination method provided in this embodiment aims to determine a limit outlet temperature of the compressor before the heat energy obtained from the compressed air is transferred to the heat exchanger through process pipelines. This limit outlet temperature will not affect the operation of subsequent energy storage processes or energy storage devices due to excessively high compressor outlet temperatures. Based on this limit outlet temperature and the current outlet temperature of the compressor in the current cycle, target performance parameters for adjusting relevant compressor operating performance parameters are determined. The compressor control device, based on the compressor outlet temperature, can then control the compressor operation according to the target control parameters for the current cycle, thereby reducing the compressor's operating load temperature and outlet temperature, ensuring the safe operation of the compressed air energy storage system.

[0032] Continue to refer to Figure 1 ,likeFigure 1 As shown, the method includes:

[0033] S101. Determine the compressed air mass flow rate of the compressor based on the compressor operating parameters and compressor attribute parameters in the current cycle.

[0034] The current period is a pre-set calculation period. For example, if the compressor outlet temperature needs to be determined in real time, the current period can be set to "real-time". If the compressor outlet temperature does not need to be determined in real time, the current period can be set according to user needs. Compressor operating parameters may include the fluid density of air in the compressor, the air discharge coefficient, and the air expansion coefficient in the current period. Compressor attribute parameters are the attribute parameters of the orifice plate and pipes connected to the compressor during operation.

[0035] Specifically, the compressed air mass flow rate of the compressor in the current cycle can be calculated using the following formula:

[0036]

[0037] Among them, W air C is the mass flow rate of compressed air. air ε is the discharge coefficient of compressed air. air Let be the coefficient of expansion of compressed air, d1 be the inner diameter of the orifice plate at the compressor, β1 = d1 / D1, where D1 is the inner diameter of the upstream and downstream pipes of the compressor, ΔP1 is the pressure difference at the orifice plate at the compressor, and ρ be the coefficient of expansion of compressed air. air This is the fluid density of compressed air.

[0038] S102. Determine the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger.

[0039] The compressor is connected to the heat exchanger via piping, and the heat exchanger contains a heat exchange medium. The heat exchange medium's properties include parameters such as fluid density, discharge coefficient, and expansion coefficient. The maximum mass flow rate is the maximum flow rate of the heat exchange medium in the heat exchanger under the action of the regulating valve.

[0040] Specifically, since the maximum mass flow rate of the heat exchange medium in the heat exchanger is related to the opening degree of the regulating valve, the maximum mass flow rate of the heat exchange medium at the current valve opening degree can be determined based on this. Furthermore, the current mass flow rate of the heat exchange medium in the current cycle can be determined based on its property parameters. Finally, the maximum heat transfer capacity of the heat exchange medium can be determined based on its current mass flow rate, property parameters, and maximum mass flow rate.

[0041] For example, since regulating valves are provided at the inlet and outlet sides of the heat exchanger to control the flow rate of the heat exchanger medium entering and leaving the heat exchanger, the maximum mass flow rate of the heat exchanger medium corresponding to the current opening of the regulating valve in the current cycle can be determined based on the relationship between the opening degree of the regulating valve and the flow rate of the heat exchanger medium. Furthermore, the maximum heat transfer capacity of the heat exchanger medium can be determined based on the highest outlet temperature of the heat exchanger medium, the current mass flow rate of the heat exchanger medium, and the maximum mass flow rate.

[0042] In this embodiment, the maximum heat exchange capacity of the heat exchange medium is determined based on the property parameters of the heat exchange medium in the heat exchanger and the process piping or rated maximum parameters related to the heat exchange medium, thus realizing the determination of the maximum heat that the heat exchange medium can exchange in the current cycle.

[0043] S103. Determine the maximum inlet temperature of the heat exchanger based on the compressed air mass flow rate and the maximum heat exchange capacity of the heat exchange medium, and predict the maximum allowable outlet temperature of the compressor based on the maximum inlet temperature of the heat exchanger.

[0044] The maximum inlet temperature of the heat exchanger is the highest temperature that the heat exchanger material can withstand without deformation or damage, as considered during the heat exchanger design process. In this embodiment, the maximum inlet temperature is primarily the highest temperature that the current compressed air energy storage system needs to meet according to the process requirements, such as the maximum allowable temperature of the gas storage device.

[0045] Specifically, the maximum inlet temperature of the heat exchanger can be calculated using the following formula:

[0046]

[0047] Among them, T hx_MAX Q is the highest inlet temperature of the heat exchanger. w_MAX Cp is the maximum heat transfer capacity of the heat exchange medium. air η is the specific heat capacity of compressed air. hx For the heat exchanger's heat exchange efficiency, T w_dset This is the design temperature of the heat exchange medium outlet.

[0048] Specifically, after determining the maximum inlet temperature of the heat exchanger, the maximum allowable outlet temperature of the compressor can be predicted based on the compensation temperature between the inlet temperature of the compressed air side of the heat exchanger and the outlet temperature of the compressor.

[0049] For example, since compressed air passes through the pipeline connecting the compressor and heat exchanger before entering the heat exchanger from the compressor outlet, and loses some temperature during this process, the temperature loss in the pipeline before entering the heat exchanger can be determined as the compensation temperature between the inlet temperature of the heat exchanger on the compressed air side and the compressor outlet temperature. After determining the compensation temperature, the predicted maximum allowable compressor outlet temperature can be obtained based on the compensation temperature and the highest inlet temperature of the heat exchanger. The calculation method is shown in the following formula:

[0050] T comp_d_MAX =T hx_MAX +ΔT air_DEV ;

[0051] Among them, △T air_DEV To compensate for temperature, T comp_d_MAX This is the maximum permissible temperature.

[0052] In this embodiment, the maximum inlet temperature of the heat exchanger is determined based on the compressed air mass flow rate and the maximum heat exchange capacity of the heat exchange medium. This allows for the calculation of the maximum inlet temperature the heat exchanger can withstand under the current operating conditions, based on the maximum heat exchange capacity of the heat exchange medium in the current cycle and the current compressed air flow rate. Furthermore, the maximum allowable outlet temperature of the compressor is predicted based on the maximum inlet temperature of the heat exchanger, achieving a reverse prediction of the maximum allowable outlet temperature of the compressor. In this step, by working backward from the maximum heat exchange capacity of the heat exchange medium to the maximum inlet temperature of the heat exchanger, and then back to the maximum inlet temperature of the compressor, the ultimate outlet temperature of the compressor under the current operating conditions is predicted. This ultimate outlet temperature is the limit temperature that ensures the operation of subsequent energy storage processes or energy storage devices will not be affected by excessively high compressor outlet temperatures.

[0053] S104. Obtain the current outlet temperature of the compressor and the target control parameters of the previous cycle, and determine the target control parameters of the current cycle based on the current outlet temperature, the maximum allowable temperature and the target control parameters of the previous cycle, so as to control the compressor to work according to the target control parameters of the current cycle.

[0054] The control parameters are the compressor's performance control parameters, such as the compressor's speed, variable inlet guide vane angle, and variable stationary vane angle. In this embodiment, the target control parameter guides how to control the changes in the compressor's speed, variable inlet guide vane angle, and variable stationary vane angle so that the compressor operates according to the control. For example, the target control parameter can be the output parameter of the compressor control device based on the compressor outlet temperature. The target control parameter of the previous cycle is the target control parameter of the previous cycle determined according to the method provided in this embodiment of the invention. It is worth noting that when the target control parameter is determined for the first time according to the method provided in this embodiment of the invention, the target control parameter of the previous cycle can be 0, the current control parameter of the compressor, or the tracking value of the compressor's operating control parameter.

[0055] Specifically, since the maximum allowable temperature is the predicted limit temperature of the compressor outlet to ensure that the operation of subsequent energy storage processes or devices is not affected, the difference between the current outlet temperature and the maximum allowable outlet temperature can be determined. Based on this temperature difference, the compressor control device, using the compressor outlet temperature as a reference, controls the compressor's operation based on the target control parameters, thereby changing the compressor's operating performance parameters. After the compressor is controlled, changes in performance control parameters, such as altering the compressor's speed, variable inlet guide vane angle, and variable stator vane angle, will cause changes in the compressor outlet temperature. Therefore, the target control parameters for the current cycle can be determined based on the temperature difference that needs to be changed and the target control parameters of the previous cycle.

[0056] For example, the compressor temperature deviation value for the current cycle is determined based on the maximum allowable outlet temperature and the current outlet temperature, and the target control parameters for the current cycle are calculated according to the following formula.

[0057] PIC OUT (n)=TIC OUT (n)+PIC OUT (n-1);

[0058] Where n is the current period, n-1 is the previous period, and TIC OUT (n) represents the compressor's temperature deviation parameter for the current cycle. The temperature deviation parameter is the deviation of the performance index corresponding to the temperature difference. PIC represents the compressor's performance control parameter, indicating the adjustable range of performance control, such as speed, variable inlet guide vane angle, and variable stator vane angle. OUT (n-1) represents the target control parameters of the previous cycle, PIC OUT (n) represents the target control parameter for the current cycle.

[0059] For example, the target control parameters for the previous cycle can indicate the compressor's speed w, variable inlet guide vane angle θ, and variable stationary vane angle σ in the previous cycle. Then, the target control parameters for the current cycle can indicate that in the current cycle, the compressor's operating speed should reach w′, the variable inlet guide vane angle should reach θ′, and the variable stationary vane angle should reach σ′.

[0060] For example, the target control parameters can be determined based on the compressor's temperature deviation value and the performance control parameters of each compressor. For instance, consider the compressor's rotational speed. The correspondence between multiple sets of compressor rotational speed changes Δw and compressor outlet temperature changes can be predetermined, and a functional relationship between the compressor's rotational speed change and the outlet temperature change can be established. After determining the temperature difference for the current cycle, the rotational speed deviation value in the control parameters, i.e., the temperature deviation parameter, is determined based on the functional relationship and the temperature difference for the current cycle. Furthermore, the rotational speed in the target control parameters for the current cycle is determined based on the rotational speed deviation value in the control parameters and the rotational speed in the target control parameters of the previous cycle.

[0061] In this embodiment, the target control parameters of the compressor in the current cycle are determined based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle. This enables the determination of the temperature deviation value of the current cycle based on the current outlet temperature and the maximum allowable temperature of the compressor. Based on the temperature deviation value and the control of the compressor in the previous cycle, the control parameters that should be controlled for the compressor in the current cycle are directly determined, thereby automatically reducing the operating load temperature of the compressor to prevent the subsequent compressed air energy storage process from being affected by the high outlet temperature of the compressor, thus ensuring the safe operation of the compressor air energy storage system.

[0062] This invention provides a compressor control method based on compressor outlet temperature. The method determines the compressed air mass flow rate of the compressor based on the compressor's operating parameters and attribute parameters in the current cycle; determines the maximum heat exchange capacity of the heat exchange medium based on its attribute parameters and maximum mass flow rate; determines the highest inlet temperature of the heat exchanger based on the compressed air mass flow rate and the maximum heat exchange capacity of the heat exchange medium; and predicts the maximum allowable outlet temperature of the compressor based on the highest inlet temperature of the heat exchanger. The method also obtains the current outlet temperature of the compressor and the target control parameters of the previous cycle, and determines the target control parameters for the current cycle based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle, thereby controlling the compressor operation according to the target control parameters for the current cycle. In this technical solution, on the one hand, the maximum heat exchange capacity of the heat exchange medium is determined based on its attribute parameters and the process piping or rated maximum parameters related to the heat exchange medium, thus realizing the determination of the maximum heat exchange capacity of the heat exchange medium in the current cycle. On the other hand, based on the maximum heat exchange capacity of the heat exchange medium in the current cycle and the current compressed air flow rate, the highest inlet temperature that the heat exchanger can withstand under the operating conditions of the current cycle is inferred. Furthermore, by predicting the maximum allowable compressor outlet temperature based on the heat exchanger's maximum inlet temperature, a reverse prediction of the compressor's maximum allowable outlet temperature based on the heat exchanger's maximum inlet temperature is achieved. That is, by working backward from the maximum heat exchange medium's heat exchanger capacity to the heat exchanger's maximum inlet temperature, and then backward to the compressor's maximum inlet temperature, the ultimate outlet temperature of the compressor under current operating conditions is predicted. This ultimate outlet temperature is the limit temperature that ensures the operation of subsequent energy storage processes or devices will not be affected by excessively high compressor outlet temperatures. Finally, by determining the temperature deviation value for the current cycle based on the current compressor outlet temperature and the maximum allowable temperature, and based on this temperature deviation value and the compressor control in the previous cycle, the control parameters that should be controlled on the compressor in the current cycle are directly determined. This automatically reduces the compressor's operating load temperature to prevent subsequent compressed air energy storage processes from being affected by high compressor outlet temperatures, ensuring the safe operation of the compressor-air energy storage system.

[0063] Figure 3 This is a flowchart illustrating another compressor control method based on compressor outlet temperature provided by an embodiment of the present invention. Based on the above embodiments, this embodiment provides a detailed explanation of the steps of "determining the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger," "predicting the maximum allowable temperature of the compressor outlet based on the highest inlet temperature of the heat exchanger," and "determining the target control parameters for the current cycle based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle." Figure 3 As shown, the method includes:

[0064] S301. Determine the compressed air mass flow rate of the compressor based on the compressor operating parameters and compressor attribute parameters of the compressor in the current cycle.

[0065] Specifically, the compressed air mass flow rate of the compressor in the current cycle can be calculated using the following formula:

[0066]

[0067] Among them, W air C is the mass flow rate of compressed air. air ε is the discharge coefficient of compressed air. air Let be the coefficient of expansion of compressed air, d1 be the inner diameter of the orifice plate at the compressor, β1 = d1 / D1, where D1 is the inner diameter of the upstream and downstream pipes of the compressor, ΔP1 is the pressure difference at the orifice plate at the compressor, and ρ be the coefficient of expansion of compressed air. air This represents the fluid density of compressed air during the current cycle.

[0068] S302. Obtain the heat exchanger attribute parameters and the heat exchange medium operating parameters in the heat exchanger during the current cycle.

[0069] Specifically, the acquired heat exchanger attribute parameters may include the inner diameter of the orifice plate at the heat exchanger and the inner diameters of the upstream and downstream pipes of the heat exchanger. Additionally, the acquired heat exchanger operating parameters for the heat exchange medium in the current cycle may include the discharge coefficient of the heat exchange medium, the expansion coefficient of the heat exchange medium, and the fluid density of the heat exchange medium in the current cycle.

[0070] S303. Determine the current mass flow rate of the heat exchange medium based on the heat exchanger attribute parameters and the operating parameters of the heat exchange medium.

[0071] Specifically, it can be calculated using the following formula:

[0072]

[0073] Among them, W w_ex C represents the current mass flow rate of the heat exchange medium. w ε is the discharge coefficient of the heat transfer medium. w ρ is the expansion coefficient of the heat exchange medium, d2 is the inner diameter of the orifice plate at the heat exchanger, β2=d2 / D2, where D2 is the inner diameter of the upstream and downstream pipes of the heat exchanger, ΔP2 is the pressure difference at the orifice plate at the heat exchanger, and ρ is the expansion coefficient of the heat exchange medium. w This represents the fluid density of the heat exchange medium during the current cycle.

[0074] S304. Determine the maximum mass flow rate of the heat exchange medium based on the current mass flow rate and flow regulation parameters.

[0075] Among them, the flow regulation parameter is the regulation parameter of the flow regulation valve on the heat exchange medium side of the heat exchanger.

[0076] Specifically, since a regulating valve is installed on the heat exchange medium side to regulate the flow rate of the heat exchange medium into the heat exchanger, the maximum mass flow rate of the heat exchange medium can be determined based on the current mass flow rate and the flow rate regulation parameters.

[0077] For example, the maximum mass flow rate of the heat exchange medium can be determined by following these steps:

[0078] (1) Determine the flow characteristic relationship of the flow control valve based on the valve opening parameter and the valve flow parameter.

[0079] Specifically, the control valve has its valve opening data, such as the valve opening percentage. Also, the flow parameters of the heat exchange medium at different valve opening percentages, i.e., the valve flow parameters, are predetermined. Based on the valve opening percentage and the valve flow parameters, the flow characteristics of the flow control valve can be determined.

[0080] For example, the correspondence between the predetermined valve opening percentage and the valve flow parameters is shown in Table 1 below:

[0081] In the table below, the percentage sign after " / " indicates the unit.

[0082] Furthermore, after pre-determining the relationships shown in the table above, the relationship between the valve opening percentage x and the valve flow parameter percentage F1(x) can be obtained. Based on this relationship, the functional relationship between x and F1(x), i.e., the flow characteristic relationship, can be determined. The flow characteristic relationship is used to indicate the valve flow parameter percentage F1(x) corresponding to different valve opening percentages x.

[0083] Table 1. Correspondence between valve opening percentage and valve flow parameters

[0084] Valve opening percentage x / % Valve flow parameter F1(x) / % 0.00 0.00 18.51 5.00 27.07 20.09 35.63 30.72 44.19 44.26 52.75 50.61 61.31 60.84 69.87 69.90 78.43 79.92 86.99 89.94 95.55 99.97 100.00 100.00

[0085] (2) Determine the maximum mass flow rate of the heat exchange medium based on the flow characteristics and the current mass flow rate.

[0086] Specifically, since the maximum mass flow rate of the heat exchange medium is related to the valve opening degree in the current cycle, the valve opening degree parameter for the current cycle can be determined first, such as the valve opening percentage x; then, based on the flow characteristic relationship and the valve opening degree parameter for the current cycle, the valve flow rate parameter for the current cycle can be determined, such as the valve flow rate parameter F1(x); after determining the valve flow rate parameter for the current cycle, the maximum mass flow rate of the heat exchange medium can be determined based on the current mass flow rate and the valve flow rate parameter.

[0087] For example, the maximum mass flow rate can be calculated using the following formula:

[0088]

[0089] Among them, W w_exMAX F1(x) represents the maximum mass flow rate of the heat exchange medium in the current cycle, and F1(x) represents the valve flow rate parameter, which is determined based on the relationship between the valve opening and flow characteristics in the current cycle.

[0090] S305. Obtain the inlet temperature and the highest outlet temperature of the heat exchange medium in the current cycle, and determine the temperature difference of the heat exchange medium based on the inlet temperature and the highest outlet temperature.

[0091] The inlet temperature of the heat exchange medium in the current cycle is obtained through real-time monitoring and measurement, while the highest outlet temperature of the heat exchange medium in the current cycle is the temperature preset by the user.

[0092] Specifically, the inlet temperature of the heat exchange medium in the current cycle is monitored, and the maximum outlet temperature of the heat exchange medium preset by the user is obtained. The difference between the maximum outlet temperature of the heat exchange medium and the inlet temperature of the heat exchange medium is used to obtain the temperature difference of the heat exchange medium.

[0093] S306. Determine the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters, the temperature difference of the heat exchange medium, and the maximum mass flow rate.

[0094] Specifically, the maximum heat transfer capacity of the heat exchange medium can be calculated using the following formula:

[0095] Q w_MAX =Cp w ×W w_exMAX ×(T w_dsetMAX -T w_s );

[0096] Among them, Q w_MAX Cp is the maximum heat transfer capacity of the heat exchange medium. w W is the specific heat capacity of the heat exchange medium. w_exMAX T is the maximum mass flow rate of the heat exchange medium. w_dsetMAX T is the highest outlet temperature of the heat exchange medium. w_s The inlet temperature of the heat exchange medium is given by the temperature difference between the heat exchange medium and the inlet temperature (T). w_dsetMAX -T w_s ).

[0097] In this embodiment, based on the relationship between the valve opening and the valve flow rate that controls the flow rate of the heat exchange medium, the flow characteristic relationship of the flow regulating valve is determined. Based on the flow characteristic relationship and the current mass flow rate, the maximum mass flow rate of the heat exchange medium under the valve opening in the current cycle is determined. This realizes the determination of the maximum heat exchange capacity of the heat exchange medium in the current cycle, and provides a basis for back-calculating the limit temperature of the compressor outlet based on the maximum heat exchange capacity of the heat exchange medium.

[0098] S307. Determine the maximum inlet temperature of the heat exchanger based on the compressed air mass flow rate and the maximum heat exchange capacity of the heat exchange medium.

[0099] Specifically, the maximum inlet temperature of the heat exchanger can be calculated using the following formula:

[0100]

[0101] Among them, T hx_MAX Q is the highest inlet temperature of the heat exchanger. w_MAX Cp is the maximum heat transfer capacity of the heat exchange medium. air η is the specific heat capacity of compressed air. hx For the heat exchanger's heat exchange efficiency, T w_dset This is the design temperature of the heat exchange medium outlet.

[0102] S308. Determine the compensation temperature based on the current outlet temperature of the compressor and the compressed air side inlet temperature of the heat exchanger.

[0103] Specifically, since the compressor outlet and the compressed air inlet of the heat exchanger are connected by a pipe, the heat loss of the compressed air during this pipe section needs to be considered when extrapolating the compressor outlet temperature based on the relevant temperature of the heat exchanger. Therefore, the compensation temperature can be determined based on the current compressor outlet temperature and the compressed air inlet temperature of the heat exchanger.

[0104] S309. Predict the maximum allowable temperature at the compressor outlet based on the compensation temperature and the highest inlet temperature of the heat exchanger.

[0105] Specifically, the maximum allowable temperature at the compressor outlet can be calculated using the following formula:

[0106] T comp_d_MAX =T hx_MAX +ΔT air_DEV ;

[0107] Among them, △T air_DEV To compensate for temperature, T comp_d_MAX For the maximum permissible temperature, T hx_MAX This is the highest inlet temperature of the heat exchanger.

[0108] In this embodiment, the maximum heat exchange capacity of the heat exchange medium is used to deduce the maximum inlet temperature of the heat exchanger, and then to deduce the maximum inlet temperature of the compressor. This allows for the prediction of the compressor's maximum outlet temperature under the current operating conditions. This maximum outlet temperature is the limit temperature that ensures the operation of the subsequent energy storage process or energy storage device will not be affected by the excessively high compressor outlet temperature.

[0109] S310: Obtain the current outlet temperature of the compressor and the target control parameters of the previous cycle.

[0110] Specifically, the current outlet temperature of the compressor and the target control parameters of the previous cycle are obtained. The target control parameters of the previous cycle are the output parameters of the compressor control device based on the compressor outlet temperature in the previous cycle.

[0111] S311. Determine the temperature deviation parameter for the current cycle based on the current outlet temperature and the maximum allowable temperature.

[0112] The temperature deviation parameter for the current cycle is used to indicate the deviation value of the compressor control device based on the compressor outlet temperature in the current cycle. This deviation value is caused by the difference between the current compressor outlet temperature and the maximum allowable temperature.

[0113] Specifically, the predicted maximum allowable temperature at the compressor outlet is designed to ensure that the temperature of the compressed air, after passing through the compressor outlet and flowing to the heat exchanger and subsequent energy storage process equipment, does not exceed the maximum temperature limit of the heat exchanger, heat exchange medium, or other equipment. Therefore, the difference between the current outlet temperature and the maximum allowable temperature can be determined based on the maximum allowable temperature at the compressor outlet and the current outlet temperature, and the temperature deviation parameter can be determined based on this difference.

[0114] For example, the temperature deviation parameter can be determined by the following steps:

[0115] (1) Determine the current target temperature difference of the compressor based on the current outlet temperature and the maximum allowable temperature.

[0116] Specifically, the current target temperature difference can be calculated using the following formula:

[0117] ΔT x =T comp_d -T comp_d_MAX ;

[0118] Among them, △T x T represents the current target temperature difference. comp_d_ T represents the current outlet temperature. comp_d_MAX This is the maximum permissible temperature.

[0119] (2) Obtain the pre-set temperature difference correction coefficient and temperature difference gain coefficient, and determine the temperature deviation parameter of the current cycle based on the temperature difference correction coefficient, temperature difference gain coefficient and the current target temperature difference.

[0120] The preset temperature difference correction coefficient is used to correct for the temperature difference. The preset temperature difference gain coefficient is used to determine the deviation value of the performance control parameters output by the compressor control device based on the compressor outlet temperature when there is a temperature difference.

[0121] Specifically, the temperature deviation parameter for the current cycle can be calculated using the following formula:

[0122] TIC OUT (n)=ΔT x ×F2(ΔT x )×ΔTIC;

[0123] Where n is the current period, TIC OUT (n) represents the temperature deviation parameter for the current period, F2(ΔT) x ) is the temperature difference correction coefficient, and △TIC is the temperature difference gain coefficient.

[0124] S312. Determine the target control parameters for the current cycle based on the temperature deviation parameters of the current cycle and the target control parameters of the previous cycle, so as to control the compressor to work according to the target control parameters of the current cycle.

[0125] Specifically, the compressor temperature deviation value for the current cycle is determined based on the maximum allowable outlet temperature and the current outlet temperature, and the target control parameters for the current cycle are calculated according to the following formula.

[0126] PIC OUT (n)=TIC OUT (n)+PIC OUT (n-1);

[0127] Where n is the current period, n-1 is the previous period, and TIC OUT (n) represents the compressor's temperature deviation parameter for the current cycle. The temperature deviation parameter is the deviation of the performance index corresponding to the temperature difference. PIC represents the compressor's performance control parameters, indicating the adjustable range of performance control, such as speed, variable inlet guide vane angle, and variable stationary vane angle. OUT (n-1) represents the target control parameters of the previous cycle, PIC OUT (n) represents the target control parameter for the current cycle.

[0128] In this embodiment, the target control parameters of the compressor in the current cycle are determined based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle. This enables the determination of the temperature deviation value of the current cycle based on the current outlet temperature and the maximum allowable temperature of the compressor. Based on the temperature deviation value and the control of the compressor in the previous cycle, the control parameters that should be applied to the compressor in the current cycle are directly determined. The compressor is then controlled to operate according to the target control parameters of the current cycle to prevent the subsequent compressed air energy storage process from being affected by the high outlet temperature of the compressor.

[0129] This invention provides a compressor control method based on compressor outlet temperature. Utilizing the relationship between the heat exchange medium, heat exchanger, and compressor, it inversely calculates the maximum allowable temperature at the compressor outlet when the heat exchange medium has the maximum heat exchange capacity. This maximum allowable temperature is then used as the limit temperature to calculate target control parameters that guide compressor operation in the current cycle. This achieves compressor outlet temperature control from the perspective of compressor operation, thus solving the problem of current control methods where the temperature of the heat exchange medium in the heat exchanger is adjusted according to the compressor outlet temperature. This results in the compressed gas temperature exceeding the maximum temperature limit of the heat exchanger or heat exchange medium, or the heat exchange medium temperature exceeding the storage requirements of the heat storage device. On one hand, based on the relationship between the valve opening controlling the heat exchange medium flow rate and the valve flow rate, the flow characteristic relationship of the flow regulating valve is determined. Based on the flow characteristic relationship and the current mass flow rate, the maximum mass flow rate of the heat exchange medium under the valve opening in the current cycle is determined. This achieves the determination of the maximum heat exchange capacity of the heat exchange medium in the current cycle, providing a basis for inversely calculating the limit temperature at the compressor outlet based on the maximum heat exchange capacity of the heat exchange medium. On the other hand, based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle, the target control parameters of the compressor in the current cycle are determined. This enables the determination of the temperature deviation value of the current cycle based on the current outlet temperature and the maximum allowable temperature of the compressor. Based on the temperature deviation value and the control of the compressor in the previous cycle, the control parameters that should be applied to the compressor in the current cycle are directly determined. The compressor is then controlled to operate according to the target control parameters of the current cycle to prevent the subsequent compressed air energy storage process from being affected by the high outlet temperature of the compressor.

[0130] Figure 4 This is a schematic diagram of a compressor control device based on compressor outlet temperature, provided as an embodiment of the present invention. Figure 4 As shown, the device includes:

[0131] The flow rate determination module 401 is used to determine the compressed air mass flow rate of the compressor based on the compressor operating parameters and compressor attribute parameters in the current cycle.

[0132] The heat exchange determination module 402 is used to determine the maximum heat exchange of the heat exchange medium based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger.

[0133] The prediction module 403 is used to determine the maximum inlet temperature of the heat exchanger based on the compressed air mass flow rate and the maximum heat exchange of the heat exchange medium, and to predict the maximum allowable outlet temperature of the compressor based on the maximum inlet temperature of the heat exchanger.

[0134] The control module 404 is used to acquire the current outlet temperature of the compressor and the target control parameters of the previous cycle, and determine the target control parameters of the current cycle based on the current outlet temperature, the maximum allowable temperature and the target control parameters of the previous cycle, so as to control the compressor to work according to the target control parameters of the current cycle.

[0135] Optionally, before determining the maximum heat transfer capacity of the heat transfer medium based on the heat transfer medium property parameters and the maximum mass flow rate in the heat exchanger, the heat transfer capacity determination module 402 is further configured to:

[0136] Obtain the heat exchanger attribute parameters and the heat exchange medium operating parameters in the heat exchanger during the current cycle; determine the current mass flow rate of the heat exchange medium based on the heat exchanger attribute parameters and the heat exchange medium operating parameters; determine the maximum mass flow rate of the heat exchange medium based on the current mass flow rate and the flow regulation parameters, where the flow regulation parameters are the adjustment parameters of the flow regulation valve on the heat exchange medium side of the heat exchanger.

[0137] Optionally, the flow regulation parameters include the valve opening parameter and valve flow parameter of the flow regulation valve. The heat exchange determination module 402 is specifically used for:

[0138] Based on the valve opening parameters and valve flow parameters, determine the flow characteristic relationship of the flow control valve; based on the flow characteristic relationship and the current mass flow rate, determine the maximum mass flow rate of the heat exchange medium.

[0139] Optionally, the heat exchange determination module 402 is specifically used for:

[0140] Obtain the inlet temperature and the highest outlet temperature of the heat exchange medium in the current cycle, and determine the temperature difference of the heat exchange medium based on the inlet temperature and the highest outlet temperature; determine the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters, the temperature difference of the heat exchange medium, and the maximum mass flow rate.

[0141] Optionally, the prediction module 403 is specifically used for:

[0142] The compensation temperature is determined based on the current outlet temperature of the compressor and the compressed air inlet temperature of the heat exchanger; the maximum allowable outlet temperature of the compressor is predicted based on the compensation temperature and the highest inlet temperature of the heat exchanger.

[0143] Optionally, control module 404 is specifically used for:

[0144] The temperature deviation parameter for the current cycle is determined based on the current outlet temperature and the maximum allowable temperature; the target control parameter for the current cycle is determined based on the temperature deviation parameter for the current cycle and the target control parameter for the previous cycle.

[0145] Optionally, the temperature deviation parameter for the current cycle is determined based on the current outlet temperature and the maximum allowable temperature. Specifically, control module 404 is used for:

[0146] The current target temperature difference of the compressor is determined based on the current outlet temperature and the maximum allowable temperature; the pre-set temperature difference correction coefficient and temperature difference gain coefficient are obtained, and the temperature deviation parameter of the current cycle is determined based on the temperature difference correction coefficient, temperature difference gain coefficient and the current target temperature difference.

[0147] The compressor control device based on compressor outlet temperature provided in this embodiment of the invention can execute the compressor control method based on compressor outlet temperature provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of the method.

[0148] Figure 5 This is a schematic diagram of the structure of an electronic device 5 provided for an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0149] like Figure 5 As shown, the electronic device 5 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 5. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0150] Multiple components in electronic device 5 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 5 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0151] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as a compressor control method based on compressor outlet temperature.

[0152] In some embodiments, the compressor control method based on compressor outlet temperature may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 5 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the compressor control method based on compressor outlet temperature described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the compressor control method based on compressor outlet temperature by any other suitable means (e.g., by means of firmware).

[0153] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0154] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0155] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0156] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0157] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0158] A computing system can include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0159] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0160] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A compressor control method based on compressor outlet temperature, characterized in that, The method for connecting the compressor and heat exchanger piping includes: The compressed air mass flow rate of the compressor is determined based on the compressor operating parameters and compressor attribute parameters of the compressor in the current cycle. The maximum heat exchange capacity of the heat exchange medium is determined based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger. The maximum inlet temperature of the heat exchanger is determined based on the mass flow rate of the compressed air and the maximum heat exchange capacity of the heat exchange medium, and the maximum allowable outlet temperature of the compressor is predicted based on the maximum inlet temperature of the heat exchanger. The current outlet temperature of the compressor and the target control parameters of the previous cycle are obtained, and the target control parameters of the current cycle are determined based on the current outlet temperature, the maximum allowable temperature and the target control parameters of the previous cycle, so as to control the compressor to work according to the target control parameters of the current cycle. The step of determining the target control parameters for the current cycle based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle includes: Determining the temperature deviation parameter for the current cycle based on the current outlet temperature and the maximum allowable temperature includes: determining the current target temperature difference of the compressor based on the current outlet temperature and the maximum allowable temperature; obtaining a pre-set temperature difference correction coefficient and temperature difference gain coefficient, and determining the temperature deviation parameter for the current cycle based on the temperature difference correction coefficient, the temperature difference gain coefficient, and the current target temperature difference. The target control parameters for the current cycle are determined based on the temperature deviation parameters of the current cycle and the target control parameters of the previous cycle.

2. The compressor control method based on compressor outlet temperature according to claim 1, characterized in that, Before determining the maximum heat transfer capacity of the heat exchange medium based on its property parameters and maximum mass flow rate, the method further includes: Obtain the heat exchanger attribute parameters and the heat exchange medium operating parameters in the heat exchanger during the current cycle; The current mass flow rate of the heat exchange medium is determined based on the heat exchanger attribute parameters and the heat exchange medium operating parameters. Based on the current mass flow rate and flow regulation parameters, the maximum mass flow rate of the heat exchange medium is determined, wherein the flow regulation parameters are the regulation parameters of the flow regulation valve on the heat exchange medium side of the heat exchanger.

3. The compressor control method based on compressor outlet temperature according to claim 2, characterized in that, The flow regulation parameters include the valve opening parameter and valve flow parameter of the flow regulation valve; determining the maximum mass flow rate of the heat exchange medium based on the current mass flow rate and the flow regulation parameters includes: The flow characteristic relationship of the flow regulating valve is determined based on the valve opening parameter and the valve flow parameter. The maximum mass flow rate of the heat exchange medium is determined based on the flow characteristic relationship and the current mass flow rate.

4. The compressor control method based on compressor outlet temperature according to claim 1, characterized in that, The step of determining the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger includes: The inlet temperature and the highest outlet temperature of the heat exchange medium in the current cycle are obtained, and the temperature difference of the heat exchange medium is determined based on the inlet temperature and the highest outlet temperature. The maximum heat exchange capacity of the heat exchange medium is determined based on the heat exchange medium property parameters, the heat exchange medium temperature difference, and the maximum mass flow rate.

5. The compressor control method based on compressor outlet temperature according to claim 1, characterized in that, The step of predicting the maximum allowable temperature at the compressor outlet based on the highest inlet temperature of the heat exchanger includes: The compensation temperature is determined based on the current outlet temperature of the compressor and the compressed air inlet temperature of the heat exchanger. The maximum allowable temperature at the compressor outlet is predicted based on the compensation temperature and the highest inlet temperature of the heat exchanger.

6. A compressor control device based on compressor outlet temperature, characterized in that, The method according to any one of claims 1 to 5, wherein the compressor is connected to the heat exchanger via piping, the apparatus comprising: The flow rate determination module is used to determine the compressed air mass flow rate of the compressor based on the compressor operating parameters and compressor attribute parameters of the compressor in the current cycle. The heat exchange capacity determination module is used to determine the maximum heat exchange capacity of the heat exchange medium based on the heat exchange medium property parameters and the maximum mass flow rate in the heat exchanger. The prediction module is used to determine the maximum inlet temperature of the heat exchanger based on the maximum heat exchange between the compressed air mass flow rate and the heat exchange medium, and to predict the maximum allowable outlet temperature of the compressor based on the maximum inlet temperature of the heat exchanger. The control module is used to acquire the current outlet temperature of the compressor and the target control parameters of the previous cycle, and determine the target control parameters of the current cycle based on the current outlet temperature, the maximum allowable temperature and the target control parameters of the previous cycle, so as to control the compressor to work according to the target control parameters of the current cycle. The step of determining the target control parameters for the current cycle based on the current outlet temperature, the maximum allowable temperature, and the target control parameters of the previous cycle includes: Determining the temperature deviation parameter for the current cycle based on the current outlet temperature and the maximum allowable temperature includes: determining the current target temperature difference of the compressor based on the current outlet temperature and the maximum allowable temperature; obtaining a pre-set temperature difference correction coefficient and temperature difference gain coefficient, and determining the temperature deviation parameter for the current cycle based on the temperature difference correction coefficient, the temperature difference gain coefficient, and the current target temperature difference. The target control parameters for the current cycle are determined based on the temperature deviation parameters of the current cycle and the target control parameters of the previous cycle.

7. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the compressor control method based on compressor outlet temperature as described in any one of claims 1 to 5.

8. A readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the compressor control method based on the compressor outlet temperature as described in any one of claims 1 to 5.

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