Compressor unit load distribution control method, device and unit and storage medium

Abstract

The invention discloses a control method, device and unit for load distribution of a compressor unit and a storage medium. The method comprises the steps that the outlet temperature equivalent margin of each compressor in the series compressor unit and the outlet temperature average margin of all the compressors are obtained; according to the outlet temperature equivalent margin of the target compressor and the outlet temperature average margin of all the compressors, balance output parameters are determined, and the target compressor is any one of all the compressors; determining gas injection load control output parameters for controlling the gas injection load of the compressor according to the operation parameters and the rated parameters of the gas storage device; and according to the balance output parameter, the gas injection load control output parameter and the performance control parameter of the target compressor, determining a performance control instruction parameter for carrying out load distribution on the target compressor so as to control the target compressor to work according to the performance control instruction parameter. According to the method, automatic overall coordination control over the working load during operation of the series compressor unit can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressed air energy storage, and in particular to a control method, device, unit and storage medium for load distribution of a compressor unit. Background Art

[0002] Compressed air energy storage uses a compressor to store the potential energy and thermal energy of air in an air storage device and a heat storage device respectively during the energy storage stage. A heat exchanger is generally arranged on the outlet process pipeline of the compressor, and the heat exchanger is used to collect the heat of the compressed air from the compressor during the energy storage stage and store it in the heat storage device.

[0003] At present, in compressed air energy storage, multiple compressors are connected in series. In order to meet the gas storage requirements of the gas storage device, each compressor is often adjusted manually.

[0004] However, since the work of the series compressors will have mutual influence and restriction during the operation of the series compressor unit, the manual adjustment of each compressor will result in a low degree of automation and large adjustment errors. Summary of the invention

[0005] The present invention provides a control method, device, unit and storage medium for load distribution of a compressor group, which realizes the average load distribution of the compressors in the series compressor group, thereby ensuring that when adjusting any one or more compressors in the series compressor group, the operating status of each compressor will not be unbalanced due to mutual influence, thereby realizing overall coordinated control of the operation of the series compressor group.

[0006] According to one aspect of the present invention, a control method for load distribution of a compressor group is provided. The energy storage process system includes a series compressor group, a heat exchanger, a gas storage device and a load distribution unit. The series compressor group includes at least three compressors connected in series. Each compressor is connected to its corresponding heat exchanger through a pipeline. The terminal compressor in the series compressor group is connected to the gas storage device pipeline. The load distribution unit is electrically connected to each compressor, heat exchanger and gas storage device respectively. The method is applied to the load distribution unit. The method includes:

[0007] Obtaining the outlet temperature equivalent margin of each compressor in the series compressor group and the average outlet temperature margin of all compressors;

[0008] Determining a balanced output parameter according to an outlet temperature equivalent margin of a target compressor and an average outlet temperature margin of all compressors, wherein the target compressor is any one of all compressors;

[0009] Determining a gas injection load control output parameter for controlling the gas injection load of the compressor according to the operating parameters and rated parameters of the gas storage device;

[0010] According to the balance output parameter, the gas injection load control output parameter and the performance control parameter of the target compressor, the performance control instruction parameter for load distribution to the target compressor is determined, so as to control the operation of the target compressor according to the performance control instruction parameter.

[0011] According to another aspect of the present invention, a control device for load distribution of a compressor unit is provided.

[0012] The device includes:

[0013] An acquisition module, used for acquiring an outlet temperature equivalent margin of each compressor in a series compressor group and an average outlet temperature margin of all compressors;

[0014] A first determination module is used to determine a balanced output parameter according to an outlet temperature equivalent margin of a target compressor and an average outlet temperature margin of all compressors, wherein the target compressor is any one of all compressors;

[0015] A second determination module is used to determine a gas injection load control output parameter for controlling the gas injection load of the compressor according to the operating parameters and rated parameters of the gas storage device;

[0016] The control module is used to determine the performance control instruction parameters for load distribution to the target compressor according to the balance output parameters, the gas injection load control output parameters and the performance control parameters of the target compressor, so as to control the operation of the target compressor according to the performance control instruction parameters.

[0017] According to another aspect of the present invention, there is provided a load distribution unit, the load distribution unit comprising:

[0018] at least one processor; and

[0019] a memory communicatively connected to the at least one processor; wherein,

[0020] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the control method for load distribution of a compressor group described in any embodiment of the present invention.

[0021] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the control method for load distribution of a compressor unit described in any embodiment of the present invention when executed.

[0022] The load distribution control method of the compressor provided by the embodiment of the present invention obtains the outlet temperature equivalent margin of each compressor in the series compressor group and the average margin of the outlet temperature of all compressors; determines the balanced output parameter according to the outlet temperature equivalent margin of the target compressor and the average margin of the outlet temperature of all compressors; determines the injection load control output parameter for controlling the compressor injection load according to the operating parameters and rated parameters of the gas storage device; determines the performance control instruction parameter for load distribution for the target compressor according to the balanced output parameter, the injection load control output parameter and the performance control parameter of the target compressor, so as to control the target compressor to work according to the performance control instruction parameter. In the above technical scheme, on the one hand, the balanced output parameter is calculated by using the outlet temperature equivalent margin of the target compressor and the average margin of the outlet temperature of all compressors, so as to realize the load balance between the target compressor and other compressors based on the outlet temperature of the target compressor and the average outlet temperature of all compressors, and provide a basis for determining the final control parameter according to the calculated load balance in the subsequent process, so as to ensure that each compressor can meet the gas storage demand of the gas storage device in the process of mutual influence and restriction under control. On the other hand, the current operating parameters of the gas storage device are used to calculate the gas injection load control output parameters that may be needed to control the gas injection load of the compressor, so as to accurately calculate the gas injection load required by the compressor during the operation of the compressor, and provide a basis for determining the specific control parameters for load distribution control for the target compressor. Finally, according to the balanced output parameters and the gas injection load control output parameters, the output parameters that can ensure the load balance of the compressor group can be calculated, and according to the output parameters that can ensure the load balance of the compressor group and the performance control parameters of the target compressor, the performance control instruction parameters for load distribution for the target compressor are determined, so as to realize the automatic control of the target compressor in the series compressor group, and solve the problems of low automation and large adjustment error during manual adjustment. At the same time, the target compressor is controlled based on the performance control instruction parameters for load distribution for the target compressor, so as to realize the average load distribution of the compressors in the series compressor group, so as to ensure that when adjusting any or multiple compressors in the series compressor group, the operating state between each compressor will not be unbalanced due to mutual influence, and the overall coordinated control of the operation of the series compressor group is realized.

[0023] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A flow chart of a method for controlling load distribution of a compressor unit provided by an embodiment of the present invention;

[0026] Figure 2 An example diagram of the process structure of the energy storage process system provided by an embodiment of the present invention;

[0027] Figure 3 A flow chart of another method for controlling load distribution of a compressor unit provided by an embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the structure of a control device for load distribution of a compressor unit provided in an embodiment of the present invention;

[0029] Figure 5 A schematic diagram of the structure of a load distribution unit provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the term "target" and the like in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Figure 1A flow chart of a method for controlling load distribution of a compressor unit provided in an embodiment of the present invention. This embodiment can be applied to load distribution for compressors in a compressor unit, and to automatically control the operation of each compressor based on the load distribution. This method can be executed by an XX device, and the XX device can be implemented in the form of hardware and / or software. The control device for load distribution of the compressor unit can be configured in a load distribution unit. In this embodiment, the load distribution unit is a control unit in an energy storage process system, and the load distribution unit is electrically connected to each compressor, heat exchanger, and gas storage device, respectively. In general, the load distribution unit is presented in the form of an electronic device.

[0033] Before introducing the control method for injecting gas from a compressor into a gas storage device provided by the present invention, the energy storage process system involved in the present invention is briefly introduced. Figure 2 This is an example diagram of the process structure of the energy storage process system provided in an embodiment of the present invention. In this embodiment, the energy storage process system is a compressed air energy storage system. Figure 2 As shown, an energy storage process system may include: an air intake device 10, a compressor 20, a cooler 30, a heat exchanger 40, an anti-surge valve 50, a cold storage tank 601, a heat storage tank 602, an air injection regulating valve 70, a vent valve 80, an inlet shut-off valve 90 and an air storage device 100.

[0034] Among them, the normal process of a compressor unit injecting gas into the gas storage device is that the air intake device 10 inhales the air, and the air is cooled by the cooler 30 corresponding to the first compressor in the compressor unit, and then sent to the first compressor 20. After the first compressor compresses the air, the air enters the heat exchanger 40 corresponding to the first compressor through the pipeline, and the heat generated by the compressed air is stored in the heat storage tank 602, and the cold is stored in the cold storage tank 601 when the compressed air is liquefied. After the compressed air flows out of the heat exchanger corresponding to the first compressor, it will pass through the subsequent compressors and the coolers and heat exchangers corresponding to the compressors in sequence until the compressed air flows out of the compressor at the end of the series compressor unit and enters the gas storage device 100. And, an energy storage process system also includes an anti-surge valve 50 for preventing the occurrence of surge. Each compressor corresponds to an anti-surge valve. After the compressed air comes out of the last compressor process, it will pass through the gas injection regulating valve 70, the inlet shut-off valve 90 and the gas storage device 100 respectively, so as to realize the storage of compressed air in the gas storage device. The vent valve 80 is used to release the pressure in the gas storage tank or pipeline to prevent equipment damage or accidents caused by excessive pressure.

[0035] Based on the above description, since the compressed air needs to pass through multiple compressors before entering the air storage device, and each compressor is connected in series, the change in the working state of each compressor will affect the state of the compressed air before entering the air storage device. However, the air storage device has its corresponding air storage requirements. In order to ensure that the compressed air meets the air storage requirements before entering the air storage device, it is necessary to manually adjust the workload of all compressors, and it is necessary to ensure that the workload between each compressor meets the air storage requirements of the air storage device in the process of mutual influence and restriction.

[0036] Continue to refer to Figure 1 .like Figure 1 As shown, the method includes:

[0037] S101. Obtain an outlet temperature equivalent margin of each compressor in a series compressor group and an average outlet temperature margin of all compressors.

[0038] The outlet temperature equivalent margin is the difference between the gas temperature at the compressor outlet and its set value or safety limit. The outlet temperature average margin is the average value of the outlet temperature equivalent margins of all compressors in the series compressor group.

[0039] Specifically, during the operation of the energy storage process system, the outlet temperature of each compressor can be monitored in real time, and the outlet temperature equivalent margin of each compressor can be determined according to the outlet temperature of each compressor and the rated limit temperature corresponding to each compressor. And, after the outlet temperature equivalent margin of each compressor is determined, the average outlet temperature margin of all compressors can be directly calculated.

[0040] S102: Determine a balanced output parameter according to an equivalent margin of the outlet temperature of the target compressor and an average margin of the outlet temperatures of all compressors.

[0041] The target compressor is any one of all the compressors.

[0042] Specifically, since the working state of the compressor can be determined according to the corresponding working temperature of the compressor, and the gas storage requirement of the gas storage device is also related to the compressor outlet temperature, the load balance between the target compressor and other compressors can be calculated according to the outlet temperature of the target compressor and the average outlet temperature of all compressors. That is, the balance output parameter is determined according to the outlet temperature equivalent margin of the target compressor and the average outlet temperature margin of all compressors.

[0043] Exemplarily, the balanced output parameter can be calculated according to the following formula:

[0044] MPIC_TIC OUT =(T d_AVG -T d_margin)*k1*ΔTIC;

[0045] Among them, MPIC_TIC OUT is the balanced output parameter. d_AVG is the average margin of outlet temperature of all compressors. d_margin is the outlet temperature equivalent margin of the target compressor. K1 is the ratio correction coefficient of the preset corrected outlet temperature average margin and the outlet temperature equivalent margin. △TIC is the preset first gain coefficient.

[0046] In this embodiment, the balanced output parameters are calculated using the equivalent margin of the outlet temperature of the target compressor and the average margin of the outlet temperatures of all compressors, so that the load balance between the target compressor and other compressors is deduced based on the outlet temperature of the target compressor and the average outlet temperature of all compressors, thereby providing a basis for subsequently determining the final control parameters according to the calculated load balance, and ensuring that the workload of each compressor under control can meet the gas storage demand of the gas storage device in the process of mutual influence and restriction.

[0047] S103. Determine, according to the operating parameters and rated parameters of the gas storage device, a gas injection load control output parameter for controlling the gas injection load of the compressor.

[0048] The operating parameters of the gas storage device may include flow rate, pressure or pressure difference.

[0049] Specifically, since the operating parameters of the gas storage device are interrelated with the operation of each compressor, the gas injection load control output parameters required to control the gas injection load of the compressor can be calculated based on the operating parameters of the gas storage device.

[0050] For example, in one implementation, if the operating parameter of the gas storage device monitored in real time is one of flow rate, pressure or pressure difference, this operating parameter can be used as the actual feedback parameter, and the actual feedback parameter and its corresponding preset target feedback parameter can be used to deduce the gas injection load control output parameter. In another implementation, if the operating parameter of the gas storage device monitored in real time is multiple of flow rate, pressure or pressure difference, each operating parameter can be used as the actual feedback parameter, and each actual feedback parameter can be compared with the preset target feedback parameter to obtain the feedback parameter difference, and the average value of the feedback parameter difference can be calculated to deduce the gas injection load control output parameter.

[0051] Exemplarily, the gas injection load control output parameter of the compressor gas injection load may be calculated according to the following formula:

[0052] MPIC_FIC OUT =(ΔMPIC_FIC)*k2*ΔFIC;

[0053] Among them, MPIC_FIC OUT is the injection load control output parameter of the compressor injection load. △MPIC_FIC is the difference between the actual feedback parameter and the target feedback parameter, for example, the difference between the operating parameter of the gas storage device and the rated parameter of the gas storage device. K2 is a preset proportional correction coefficient for correcting the difference between the actual feedback parameter and the target feedback parameter. △FIC is a preset second gain coefficient.

[0054] In this embodiment, the current operating parameters of the gas storage device are used to calculate the gas injection load control output parameters that may be needed to control the gas injection load of the compressor, thereby achieving accurate calculation of the gas injection load required by the compressor during the operation of the compressor, and providing a basis for subsequently determining the specific control parameters for load distribution control of the target compressor.

[0055] S104. Determine performance control instruction parameters for load distribution to the target compressor according to the balance output parameters, the gas injection load control output parameters and the performance control parameters of the target compressor, so as to control the operation of the target compressor according to the performance control instruction parameters.

[0056] The performance control parameters are performance parameters for the load distribution unit to control the operation of the compressor, such as the speed of the compressor, the variable inlet guide vane angle, and the variable stator vane angle. In this embodiment, the performance control instruction parameters are used to instruct how to control the speed of the compressor, the change of the variable inlet guide vane angle, and the variable stator vane angle, so that the target compressor works according to the control and the load distribution of the target compressor is achieved.

[0057] Specifically, according to the balanced output parameter and the gas injection load control output parameter, the output parameter that can ensure the load balance of the compressor group can be calculated. After the load amount that needs to be allocated to the target compressor is calculated, the performance control instruction parameter for load allocation to the target compressor in the current cycle can be determined according to the performance control parameter of the target compressor in the previous cycle and the load amount that needs to be allocated to the target compressor.

[0058] Exemplarily, the load amount allocated to the target compressor may be calculated according to the following formula:

[0059] MPIC OUT =MPIC_FIC OUT +MPIC_TIC OUT ;

[0060] Among them, MPIC OUT Output parameter to ensure load balance of compressor unit. MPIC_FIC OUT The injection load control output parameter for the compressor injection load. MPIC_TIC OUTis the balanced output parameter.

[0061] Furthermore, after determining the output parameters that ensure load balance of the compressor group, the performance control parameters of the target compressor in the previous cycle can be directly obtained, and the performance control instruction parameters for load distribution to the target compressor in the current cycle can be determined based on the performance control parameters of the target compressor in the previous cycle and the output parameters that ensure load balance of the compressor group.

[0062] It is worth noting that the target compressor in this embodiment can be one compressor in the series compressor group or multiple compressors in the current cycle. For example, when only one compressor needs to be adjusted, only this one compressor needs to be used as the target compressor and its performance control instruction parameters are calculated. If multiple compressors need to be adjusted, these multiple compressors can be used as target compressors respectively, and the performance control instruction parameters of each target compressor can be calculated to realize the operation control of multiple compressors and realize the load distribution thereof.

[0063] In this embodiment, the output parameters that can ensure the load balance of the compressor group can be calculated based on the balanced output parameters and the gas injection load control output parameters, and the performance control instruction parameters for load distribution to the target compressor are determined based on the output parameters that can ensure the load balance of the compressor group and the performance control parameters of the target compressor, thereby realizing automatic control of the target compressor in the series compressor group and solving the problems of low automation and large adjustment error during manual adjustment. At the same time, the target compressor is controlled based on the performance control instruction parameters for load distribution to the target compressor, realizing the load balance distribution of the compressors in the series compressor group, thereby ensuring that when adjusting any or multiple compressors in the series compressor group, the operating state of each compressor will not be unbalanced due to mutual influence, thereby realizing the overall coordinated control of the operation of the series compressor group.

[0064] The load distribution control method of the compressor provided by the embodiment of the present invention obtains the outlet temperature equivalent margin of each compressor in the series compressor group and the average margin of the outlet temperature of all compressors; determines the balanced output parameter according to the outlet temperature equivalent margin of the target compressor and the average margin of the outlet temperature of all compressors; determines the injection load control output parameter for controlling the compressor injection load according to the operating parameters and rated parameters of the gas storage device; determines the performance control instruction parameter for load distribution for the target compressor according to the balanced output parameter, the injection load control output parameter and the performance control parameter of the target compressor, so as to control the target compressor to work according to the performance control instruction parameter. In the above technical scheme, on the one hand, the balanced output parameter is calculated by using the outlet temperature equivalent margin of the target compressor and the average margin of the outlet temperature of all compressors, so as to realize the load balance between the target compressor and other compressors based on the outlet temperature of the target compressor and the average outlet temperature of all compressors, and provide a basis for determining the final control parameter according to the calculated load balance in the subsequent process, so as to ensure that each compressor can meet the gas storage demand of the gas storage device in the process of mutual influence and restriction under control. On the other hand, the current operating parameters of the gas storage device are used to calculate the gas injection load control output parameters that may be needed to control the gas injection load of the compressor, so as to accurately calculate the gas injection load required by the compressor during the operation of the compressor, and provide a basis for determining the specific control parameters for load distribution control for the target compressor. Finally, according to the balanced output parameters and the gas injection load control output parameters, the output parameters that can ensure the load balance of the compressor group can be calculated, and according to the output parameters that can ensure the load balance of the compressor group and the performance control parameters of the target compressor, the performance control instruction parameters for load distribution for the target compressor are determined, so as to realize the automatic control of the target compressor in the series compressor group, and solve the problems of low automation and large adjustment error during manual adjustment. At the same time, the target compressor is controlled based on the performance control instruction parameters for load distribution for the target compressor, so as to realize the average load distribution of the compressors in the series compressor group, so as to ensure that when adjusting any or multiple compressors in the series compressor group, the operating state between each compressor will not be unbalanced due to mutual influence, and the overall coordinated control of the operation of the series compressor group is realized.

[0065] Figure 3A flowchart of another method for controlling load distribution of a compressor unit provided by an embodiment of the present invention. Based on the above embodiment, this embodiment describes in detail the steps of "obtaining the equivalent margin of the outlet temperature of each compressor in the series compressor unit and the average margin of the outlet temperature of all compressors", "determining the injection load control output parameter for controlling the injection load of the compressor according to the operating parameters and rated parameters of the gas storage device", and "determining the performance control instruction parameter for load distribution to the target compressor according to the balanced output parameter, the injection load control output parameter and the performance control parameter of the target compressor". Figure 3 As shown, the method includes:

[0066] S301. For each compressor, determine the outlet temperature equivalent margin of the compressor according to the outlet temperature operating parameter of the compressor and the rated inlet temperature parameter of the heat exchanger corresponding to the compressor.

[0067] Specifically, the outlet temperature equivalent margin of the compressor can be determined according to the following steps:

[0068] (1) Obtain the outlet temperature of the compressor and the rated inlet temperature parameters of the heat exchanger corresponding to the compressor.

[0069] Each compressor has a corresponding heat exchanger. The rated inlet temperature parameters of the heat exchanger include the maximum and minimum inlet temperatures allowed by the heat exchanger.

[0070] Specifically, the outlet temperature of the compressor can be monitored by using a monitoring device to obtain the outlet temperature of the compressor. Also, the rated inlet temperature parameter of the heat exchanger can be determined according to the design parameters of the heat exchanger.

[0071] (2) Determine the adjustable margin of the compressor outlet temperature based on the compressor outlet temperature and the rated inlet temperature parameters of the heat exchanger.

[0072] Specifically, the adjustable margin of the compressor outlet temperature can be calculated according to the following formula:

[0073]

[0074] Among them, T d_margin T is the adjustable margin of the compressor outlet temperature, and its value range is [0,1]. d is the outlet temperature of the compressor. air_min The minimum inlet temperature allowed for the heat exchanger to operate. air_max The maximum inlet air temperature allowed for the heat exchanger to operate.

[0075] (3) Obtain a preset correction coefficient, and determine the compressor outlet temperature equivalent margin based on the correction coefficient and the adjustable margin of the compressor outlet temperature.

[0076] The preset correction coefficient is a margin correction coefficient, which is used to compensate for different working characteristics of the compressor.

[0077] Specifically, the compressor outlet temperature equivalent margin can be calculated according to the following formula:

[0078] T d_margin' =β1*T d_margin ;

[0079] Among them, T d_margin’ is the outlet temperature equivalent margin of the compressor. β1 is the correction coefficient.

[0080] In this embodiment, the rated inlet temperature parameters of the heat exchanger corresponding to the compressor and the outlet temperature of the compressor are used to determine the adjustable margin of the outlet temperature of the compressor, and the outlet temperature adjustable margin is corrected using the correction parameter to obtain the outlet temperature equivalent margin of the compressor. This realizes the accurate determination of the outlet temperature equivalent margin of each compressor under the current working state according to the working characteristics of each compressor, while ensuring the system stability and working safety of the entire compressed air energy storage system, and also provides a basis for subsequently determining different load distribution controls for each compressor.

[0081] S302: Determine the average margin of the outlet temperatures of all the compressors according to the equivalent margins of the outlet temperatures of all the compressors.

[0082] Specifically, the method for determining the average margin of the outlet temperature can be carried out according to the following steps:

[0083] (1) The outlet temperature equivalent margin of each compressor is summed to obtain the total outlet temperature equivalent margin of all compressors.

[0084] Specifically, after the outlet temperature equivalent margin of each compressor is obtained according to the method of S301, the outlet temperature equivalent margins of all compressors may be added together to obtain the sum of the outlet temperature equivalent margins of all compressors.

[0085] (2) Based on the sum of the outlet temperature equivalent margins, determine the average outlet temperature margin of all compressors.

[0086] Specifically, the average margin of outlet temperature can be calculated according to the following formula:

[0087]

[0088] Among them, T d_AVG is the average margin of outlet temperature. N is the number of compressors in the series compressor group. i is the i-th, i≤N. is the sum of the outlet temperature equivalent margins.

[0089] S303: Determine a balanced output parameter according to the outlet temperature equivalent margin of the target compressor and the outlet temperature average margin of all compressors.

[0090] Specifically, the balanced output parameter can be calculated according to the following formula:

[0091] MPIC_TIC OUT =(T d_AVG -T d_margin )*k1*ΔTIC;

[0092] Among them, MPIC_TIC OUT is the balanced output parameter. d_AVG is the average margin of outlet temperature of all compressors. d_margin is the outlet temperature equivalent margin of the target compressor. K1 is the ratio correction coefficient of the preset corrected outlet temperature average margin and the outlet temperature equivalent margin. △TIC is the preset first gain coefficient.

[0093] S304: Determine the operating parameter type of the gas storage device, and determine the load control feedback parameter of the target compressor according to the operating parameter type and the operating parameter of the gas storage device.

[0094] Among them, the operating parameter types of the gas storage device include: flow type parameters and pressure type parameters.

[0095] Specifically, the load control feedback parameter of the target compressor can be determined as follows:

[0096] (1) If the operating parameter type of the gas storage device is a flow type parameter, then:

[0097] In one implementation, the mass flow parameter of the gas storage device can be determined and used as a load control feedback parameter of the target compressor. For example:

[0098]

[0099] Among them, MPIC_FIC PV is the load control feedback parameter of the target compressor. W is the mass flow parameter of the gas storage device. C air is the discharge coefficient of compressed air. air is the expansion coefficient of compressed air. d is the inner diameter of the orifice plate at the gas storage device. D is the inner diameter of the upstream and downstream pipelines of the gas storage device. △P is the pressure difference of the orifice plate at the gas storage device. ρ air is the fluid density of compressed air.

[0100] In another implementation, the reduced flow parameter of the gas storage device can be determined, and the reduced flow parameter can be used as the load control feedback parameter of the target compressor. For example:

[0101]

[0102] Among them, MPIC_FIC PV is the load control feedback parameter of the target compressor. cor is the equivalent flow parameter of the gas storage device. W is the mass flow parameter of the gas storage device. T is the inlet temperature of the gas storage device. T0 is the temperature of the gas storage device under standard conditions. P is the inlet pressure of the gas storage device. P0 is the pressure of the gas storage device under standard conditions.

[0103] (2) If the operating parameter type of the gas storage device is a pressure type parameter, then:

[0104] In one implementation, the pressure difference parameter of the gas storage device can be determined, and the pressure difference parameter can be used as a load control feedback parameter of the target compressor. For example:

[0105] MPIC_FIC PV =P dN -P storage ;

[0106] Among them, MPIC_FIC PV P is the load control feedback parameter of the target compressor. dN P is the outlet pressure of the compressor N at the end of the series compressor. storage is the actual pressure of the gas storage device.

[0107] In another implementation, the gas storage pressure parameter of the gas storage device in the current cycle may be directly determined, and the gas storage pressure parameter may be used as a load control feedback parameter of the target compressor.

[0108] In this embodiment, based on the previously determined operating parameter type of the air storage device, and according to the operating parameter type of the air storage device and the corresponding operating parameters of the air storage device, the load control feedback parameters of the target compressor are determined. It is possible to determine the operating parameters of different air storage devices using the operating parameter types of different air storage devices, and to determine the load control feedback parameters of the target compressor according to the operating parameters of different air storage devices, thereby realizing diversified determination of the load control feedback parameters of the target compressor.

[0109] S305 . Determine an injection load control output parameter for controlling the gas injection load of the compressor according to the load control feedback parameter and the preset load control target parameter.

[0110] Specifically, the difference between the preset load control target parameter and the load control feedback parameter can be calculated to obtain the difference between the actual feedback parameter and the target feedback parameter, and then the gas injection load control output parameter can be calculated according to the following formula.

[0111] MPIC_FIC OUT =(ΔMPIC_FIC)*k2*ΔFIC;

[0112] Among them, MPIC_FIC OUT is the injection load control output parameter of the compressor injection load. △MPIC_FIC is the difference between the actual feedback parameter and the target feedback parameter, for example, the difference between the operating parameter of the gas storage device and the rated parameter of the gas storage device. K2 is a preset proportional correction coefficient for correcting the difference between the actual feedback parameter and the target feedback parameter. △FIC is a preset second gain coefficient.

[0113] S306: Obtain performance normalization instruction parameters of the target compressor in the previous cycle.

[0114] Among them, the performance normalization instruction parameter is used to normalize the gas injection load control output parameter.

[0115] Specifically, the load distribution unit may obtain the performance normalization instruction parameters of the previous cycle from the historical records.

[0116] S307 . Determine the performance normalization instruction parameters of the target compressor in the current cycle according to the performance normalization instruction parameters, the balance output parameters and the gas injection load control output parameters of the target compressor in the previous cycle.

[0117] Specifically, the performance normalization instruction parameters of the target compressor in the current cycle can be determined according to the following steps:

[0118] (1) Determine the load distribution parameters based on the balance output parameters and the gas injection load control output parameters.

[0119] Specifically, the load distribution parameters can be calculated according to the following formula:

[0120] MPIC OUT (n) = MPIC_FIC OUT (n)+MPIC_TIC OUT (n);

[0121] Among them, MPIC OUT (n) is the load distribution parameter of the current cycle. n represents the current cycle. In this embodiment, the above-calculated balanced output parameters and gas injection load control output parameters, for example, are all parameters of the current cycle.

[0122] (2) Determine the performance normalization instruction parameters of the target compressor in the current cycle based on the performance normalization instruction parameters and load distribution parameters of the target compressor in the previous cycle.

[0123] PIC OP (n) = MPIC OUT (n)+PIC OP (n-1);

[0124] Among them, PIC OP (n) is the performance normalized instruction parameter of the current cycle. OP (n-1) is the performance normalized instruction parameter of the previous cycle.

[0125] S308. Determine performance control instruction parameters for load distribution to the target compressor according to the performance control parameters of the compressor and the performance normalization instruction parameters of the target compressor in the current cycle, so as to control the target compressor to operate according to the performance control instruction parameters.

[0126] Specifically, the performance control instruction parameter for load distribution to the target compressor may be determined according to the following formula:

[0127]

[0128] Among them, PIC OUT (n) is the performance control instruction parameter of the current cycle. PIC MAX The maximum adjustable capacity parameter for the target compressor performance control. MIN is the minimum adjustable capability parameter of the target compressor's performance control, wherein the adjustable range of the compressor's performance control is within a value range of 0-100.

[0129] Specifically, after determining the performance control instruction parameters for load distribution to the target compressor, the load distribution unit can issue control instructions to the target compressor according to the performance control instruction parameters, and control the operation of the target compressor to ensure that the adjustment of each compressor in the compressor group will not cause load imbalance due to the adjustment of other compressors, thereby achieving overall coordinated control of the operation of the series compressor group.

[0130] The load distribution control method for a compressor provided in an embodiment of the present invention, on the one hand, uses the rated inlet temperature parameter of the heat exchanger corresponding to the compressor and the outlet temperature of the compressor to determine the adjustable margin of the outlet temperature of the compressor, and uses the correction parameter to correct the adjustable margin of the outlet temperature to obtain the outlet temperature equivalent margin of the compressor, thereby realizing the accurate determination of the outlet temperature equivalent margin of each compressor under the current working state according to the working characteristics of each compressor, while ensuring the system stability and working safety of the entire compressed air energy storage system, and also providing a basis for determining different load distribution controls for each compressor in the future. On the other hand, based on the first determined operating parameter type of the air storage device, and according to the operating parameter type of the air storage device and the corresponding operating parameters of the air storage device, the load control feedback parameters of the target compressor are determined, so that the operating parameters of different air storage devices can be determined by using the operating parameter types of different air storage devices, and the load control feedback parameters of the target compressor can be determined according to the operating parameters of different air storage devices, thereby realizing diversified determination of the load control feedback parameters of the target compressor. Finally, according to the balanced output parameters and the gas injection load control output parameters, the output parameters that can ensure the load balance of the compressor group can be calculated, and according to the output parameters that can ensure the load balance of the compressor group and the performance control parameters of the target compressor, the performance control instruction parameters for load distribution to the target compressor are determined, and the automatic control of the target compressor in the series compressor group is realized, solving the problems of low automation and large adjustment error during manual adjustment. At the same time, the target compressor is controlled based on the performance control instruction parameters for load distribution to the target compressor, and the load of the compressors in the series compressor group is evenly distributed, thereby ensuring that when adjusting any or multiple compressors in the series compressor group, the operating status of each compressor will not be unbalanced due to mutual influence, and the overall coordinated control of the operation of the series compressor group is realized.

[0131] Figure 4 A schematic diagram of the structure of a control device for load distribution of a compressor unit provided in an embodiment of the present invention. Figure 4 As shown, the energy storage process system includes a series compressor group, a heat exchanger, a gas storage device and a load distribution unit. The series compressor group includes at least three compressors connected in series. Each compressor is connected to its corresponding heat exchanger through a pipeline. The compressor at the end of the series compressor group is connected to the gas storage device pipeline. The load distribution unit is electrically connected to each compressor, heat exchanger, and gas storage device respectively. The device includes:

[0132] An acquisition module 401 is used to acquire an outlet temperature equivalent margin of each compressor in a series compressor group and an average outlet temperature margin of all compressors;

[0133] A first determination module 402 is used to determine a balanced output parameter according to an outlet temperature equivalent margin of a target compressor and an average outlet temperature margin of all compressors, wherein the target compressor is any one of all compressors;

[0134] The second determination module 403 is used to determine the gas injection load control output parameter for controlling the gas injection load of the compressor according to the operating parameters and rated parameters of the gas storage device;

[0135] The control module 404 is used to determine the performance control instruction parameters for load distribution to the target compressor according to the balance output parameters, the gas injection load control output parameters and the performance control parameters of the target compressor, so as to control the operation of the target compressor according to the performance control instruction parameters.

[0136] Optionally, the acquisition module 401 is specifically used for:

[0137] For each compressor, the outlet temperature equivalent margin of the compressor is determined according to the outlet temperature operating parameters of the compressor and the rated inlet temperature parameters of the heat exchanger corresponding to the compressor; based on the outlet temperature equivalent margins of all compressors, the average outlet temperature margins of all compressors are determined.

[0138] Optionally, the outlet temperature equivalent margin of the compressor is determined according to the outlet temperature operating parameter of the compressor and the rated inlet temperature parameter of the heat exchanger corresponding to the compressor. The acquisition module 401 is specifically used for:

[0139] The outlet temperature of the compressor and the rated inlet temperature parameters of the heat exchanger corresponding to the compressor are obtained; the adjustable margin of the compressor outlet temperature is determined according to the outlet temperature of the compressor and the rated inlet temperature parameters of the heat exchanger; a preset correction coefficient is obtained, and the equivalent margin of the compressor outlet temperature is determined according to the correction coefficient and the adjustable margin of the compressor outlet temperature.

[0140] Optionally, according to the outlet temperature equivalent margins of all compressors, the average outlet temperature margins of all compressors are determined, and the acquisition module 401 is specifically used to:

[0141] The outlet temperature equivalent margins of each compressor are summed to obtain the sum of the outlet temperature equivalent margins of all compressors; and the average outlet temperature margins of all compressors are determined based on the sum of the outlet temperature equivalent margins.

[0142] Optionally, the second determining module 403 is specifically configured to:

[0143] Determine the operating parameter type of the gas storage device, and determine the load control feedback parameters of the target compressor based on the operating parameter type and the operating parameters of the gas storage device; determine the injection load control output parameters for controlling the gas injection load of the compressor based on the load control feedback parameters and the preset load control target parameters.

[0144] Optionally, the control module 404 is specifically used for:

[0145] Obtain the performance normalization instruction parameters of the target compressor in the previous cycle; determine the performance normalization instruction parameters of the target compressor in the current cycle based on the performance normalization instruction parameters of the target compressor in the previous cycle, the balance output parameters and the gas injection load control output parameters; determine the performance control instruction parameters for load distribution to the target compressor based on the performance control parameters of the compressor and the performance normalization instruction parameters of the target compressor in the current cycle.

[0146] Optionally, according to the performance normalization instruction parameter, the balance output parameter and the gas injection load control output parameter of the target compressor in the previous cycle, the performance normalization instruction parameter of the target compressor in the current cycle is determined, and the control module 404 is specifically used to:

[0147] The load distribution parameters are determined according to the balance output parameters and the gas injection load control output parameters; the performance normalization instruction parameters of the target compressor in the current cycle are determined according to the performance normalization instruction parameters of the target compressor in the previous cycle and the load distribution parameters.

[0148] The control device for load distribution of a compressor group provided in the embodiment of the present invention can execute the control method for load distribution of a compressor group provided in any embodiment of the present invention, and has the functional modules and beneficial effects corresponding to the execution method.

[0149] Figure 5 A schematic diagram of the structure of the load distribution unit 5 provided for an embodiment of the present invention. In the present embodiment, the load distribution unit can be presented in the form of an electronic device. 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 processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0150] like Figure 5As shown, the load distribution unit 5 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the load distribution unit 5 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0151] A number of components in the load distribution unit 5 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the load distribution unit 5 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0152] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The processor 11 executes the various methods and processes described above, such as a control method for load distribution of a compressor unit.

[0153] In some embodiments, the control method for load distribution of the compressor group can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the load distribution unit 5 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the control method for load distribution of the compressor group described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to perform the control method for load distribution of the compressor group by any other appropriate means (for example, by means of firmware).

[0154] Various implementations 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 chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0155] Computer programs for implementing 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, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0156] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0157] To provide interaction with a user, the systems and techniques described herein may 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 a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0158] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0159] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the respective computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0160] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0161] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for controlling load distribution of a compressor unit, characterized in that: The energy storage process system comprises a series compressor group, a heat exchanger, a gas storage device and a load distribution unit, wherein the series compressor group comprises at least three compressors connected in series, each of the compressors is connected to its corresponding heat exchanger through a pipeline, the terminal compressor in the series compressor group is connected to the gas storage device pipeline, and the load distribution unit is electrically connected to each of the compressors, the heat exchanger and the gas storage device respectively; The method is applied to a load distribution unit, and the method comprises: Obtaining an outlet temperature equivalent margin of each compressor in the series compressor group and an average outlet temperature margin of all compressors; Determining a balanced output parameter according to an outlet temperature equivalent margin of a target compressor and an average outlet temperature margin of all the compressors, wherein the target compressor is any one of all the compressors; Determining a gas injection load control output parameter for controlling the gas injection load of the compressor according to the operating parameters and rated parameters of the gas storage device; According to the balance output parameter, the gas injection load control output parameter and the performance control parameter of the target compressor, a performance control instruction parameter for load distribution to the target compressor is determined, so as to control the operation of the target compressor according to the performance control instruction parameter.

2. The method for controlling load distribution of a compressor unit according to claim 1, characterized in that: The obtaining of the outlet temperature equivalent margin of each compressor in the series compressor set and the outlet temperature average margin of all compressors includes: For each compressor, determining an outlet temperature equivalent margin of the compressor according to an outlet temperature operating parameter of the compressor and a rated inlet temperature parameter of a heat exchanger corresponding to the compressor; Based on the equivalent margins of the outlet temperatures of all compressors, the average margins of the outlet temperatures of all compressors are determined.

3. The method for controlling load distribution of a compressor unit according to claim 2, characterized in that: The step of determining the outlet temperature equivalent margin of the compressor according to the outlet temperature operating parameter of the compressor and the rated inlet temperature parameter of the heat exchanger corresponding to the compressor comprises: Acquire the outlet temperature of the compressor and the rated inlet temperature parameter of the heat exchanger corresponding to the compressor; Determining an adjustable margin of the compressor outlet temperature according to the compressor outlet temperature and the rated inlet temperature parameter of the heat exchanger; A preset correction coefficient is obtained, and an outlet temperature equivalent margin of the compressor is determined according to the correction coefficient and an adjustable margin of the compressor outlet temperature.

4. The method for controlling load distribution of a compressor unit according to claim 2, characterized in that: Determining the average margin of the outlet temperatures of all compressors according to the equivalent margins of the outlet temperatures of all compressors includes: The outlet temperature equivalent margins of each compressor are summed to obtain the sum of the outlet temperature equivalent margins of all compressors; The average outlet temperature margins of all compressors are determined according to the sum of the outlet temperature equivalent margins.

5. The method for controlling load distribution of a compressor unit according to claim 1, characterized in that: Determining the gas injection load control output parameter for controlling the gas injection load of the compressor according to the operating parameters and rated parameters of the gas storage device includes: Determining an operating parameter type of the gas storage device, and determining a load control feedback parameter of the target compressor according to the operating parameter type of the gas storage device and the operating parameter of the gas storage device; According to the load control feedback parameter and the preset load control target parameter, an injection load control output parameter for controlling the compressor injection load is determined.

6. The method for controlling load distribution of a compressor unit according to claim 1, characterized in that: The step of determining the performance control instruction parameter for load distribution to the target compressor according to the balance output parameter, the gas injection load control output parameter and the performance control parameter of the target compressor comprises: Obtaining a performance normalization instruction parameter of the target compressor in the previous cycle; Determining the performance normalization instruction parameter of the target compressor in the current cycle according to the performance normalization instruction parameter of the target compressor in the previous cycle, the balance output parameter and the gas injection load control output parameter; According to the performance control parameters of the compressor and the performance normalization instruction parameters of the target compressor in the current cycle, performance control instruction parameters for load distribution to the target compressor are determined.

7. The method for controlling load distribution of a compressor unit according to claim 6, characterized in that: The step of determining the performance normalized instruction parameter of the target compressor in the current cycle according to the performance normalized instruction parameter of the target compressor in the previous cycle, the balance output parameter and the gas injection load control output parameter comprises: Determining a load distribution parameter according to the balance output parameter and the gas injection load control output parameter; The performance normalization instruction parameter of the target compressor in the current cycle is determined according to the performance normalization instruction parameter of the target compressor in the previous cycle and the load distribution parameter.

8. A control device for load distribution of a compressor unit, characterized in that: The energy storage process system comprises a series compressor group, a heat exchanger, a gas storage device and a load distribution unit, wherein the series compressor group comprises at least three compressors connected in series, each of the compressors is connected to its corresponding heat exchanger through a pipeline, the terminal compressor in the series compressor group is connected to the gas storage device pipeline, and the load distribution unit is electrically connected to each of the compressors, the heat exchanger and the gas storage device respectively; The device comprises: An acquisition module, used for acquiring an outlet temperature equivalent margin of each compressor in the series compressor group and an average outlet temperature margin of all compressors; A first determination module, configured to determine a balanced output parameter according to an outlet temperature equivalent margin of a target compressor and an average outlet temperature margin of all the compressors, wherein the target compressor is any one of all the compressors; A second determination module is used to determine a gas injection load control output parameter for controlling the gas injection load of the compressor according to the operating parameters and rated parameters of the gas storage device; A control module is used to determine the performance control instruction parameters for load distribution to the target compressor according to the balance output parameters, the gas injection load control output parameters and the performance control parameters of the target compressor, so as to control the operation of the target compressor according to the performance control instruction parameters.

9. A load distribution unit, characterized in that: include: one or more processors; a memory for storing 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 method for controlling load distribution of the compressor group according to any one of claims 1 to 7.

10. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for controlling load distribution of a compressor unit according to any one of claims 1 to 7 is implemented.

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