Control method, device and unit for gas injection of compressor to gas storage device and medium

Abstract

The invention discloses a control method, device and unit for a compressor to inject gas into a gas storage device and a medium, and the control method comprises the steps that when gas is injected into the gas storage device for the first time, the current compressor is started, and periodic operation parameters of the current compressor in the current control period are monitored; according to the periodic operation parameters and preset design parameters, compressor control parameters and gas injection regulating valve control parameters of the current period are determined; the current compressor is controlled to work according to the compressor control parameters, and the opening and closing scale of the gas injection adjusting valve is adjusted according to the gas injection adjusting valve control parameters; acquiring the current pressure of the gas storage device; if the current pressure is larger than or equal to the outlet design pressure of the current compressor, it is determined that gas injection of the current compressor to the gas storage device is completed; and if the current pressure is smaller than the outlet design pressure of the current compressor, returning to execute the step of monitoring the periodic operation parameters of the current compressor in the current control period. The compressor unit can directly inject gas into the gas storage device for the first time.

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 medium for injecting air from a compressor into an air storage device. Background Art

[0002] During the energy storage stage, compressed air energy storage uses a compressor to store the potential energy and thermal energy of air in the gas storage device and heat storage device respectively. Among them, the first gas injection of the gas storage device is a key step before the operation of the compressed air energy storage system. The gas injection pressure is generally gradually increased from the conventional atmospheric pressure to the pressure level required for operation.

[0003] At present, the normal operating pressure range of the series compressor group of the compressed air energy storage system corresponds to the minimum and maximum pressure range of the gas storage device. Therefore, when the gas storage device is first injected with gas, a separate gas injection compressor system is generally used to inject gas into the gas storage device alone.

[0004] However, if a single gas injection compressor system is used to inject gas into the gas storage device, the gas injection flow rate is small and the cost is high. Summary of the invention

[0005] The present invention provides a control method, device, unit and medium for gas injection from a compressor to a gas storage device, which can realize the first gas injection from a compressor unit directly to a gas storage device.

[0006] According to one aspect of the present invention, a control method for injecting gas from a compressor into a gas storage device is provided. The energy storage process system includes a compressor unit, a gas storage device and an air energy storage unit. The compressor unit includes at least three compressors connected in series. A gas injection regulating valve is provided on a process pipeline connecting the compressor unit and the gas storage device. The air energy storage unit is electrically connected to each compressor, the gas storage device and the gas injection regulating valve. The method is applied to the air energy storage unit, and the method includes:

[0007] When the gas storage device is first injected with gas, the current compressor is started, and the periodic operation parameters of the current compressor in the current control period are monitored, wherein the current compressor is a compressor in a low-pressure section or a compressor in a medium-pressure section;

[0008] Determine the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters;

[0009] Controlling the operation of the current compressor according to the compressor control parameters, and adjusting the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters;

[0010] Get the current pressure of the gas storage device;

[0011] If the current pressure is greater than or equal to the outlet design pressure of the current compressor, it is determined that the gas injection of the current compressor into the gas storage device is completed;

[0012] If the current pressure is less than the outlet design pressure of the current compressor, the process returns to the step of monitoring the periodic operating parameters of the current compressor in the current control period.

[0013] According to another aspect of the present invention, a control device for injecting gas from a compressor into an air storage device is provided, the device being arranged in an air energy storage unit, the device comprising:

[0014] A monitoring module, used to start the current compressor when the gas storage device is first injected with gas, and monitor the periodic operating parameters of the current compressor in the current control cycle, wherein the current compressor is a compressor of a low-pressure section or a compressor of a medium-pressure section;

[0015] A determination module, used to determine the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters;

[0016] A regulating module, used to control the operation of the current compressor according to the compressor control parameters, and to adjust the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters;

[0017] The judgment module is used to obtain the current pressure of the gas storage device; if the current pressure is greater than or equal to the outlet design pressure of the current compressor, it is determined that the current compressor has completed the gas injection into the gas storage device; if the current pressure is less than the outlet design pressure of the current compressor, it returns to execute the step of monitoring the periodic operating parameters of the current compressor in the current control cycle.

[0018] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0019] at least one processor; and

[0020] a memory communicatively connected to the at least one processor; wherein,

[0021] 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 method for controlling the compressor to inject gas into the gas storage device as described in any embodiment of the present invention.

[0022] 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 method for controlling the compressor to inject gas into a gas storage device as described in any embodiment of the present invention when executed.

[0023] The control method for the compressor to inject gas into the gas storage device provided in the embodiment of the present invention starts the current compressor when injecting gas into the gas storage device for the first time, and monitors the periodic operation parameters of the current compressor in the current control cycle; determines the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the periodic operation parameters and the preset design parameters; controls the operation of the current compressor according to the compressor control parameters, and adjusts the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters; obtains the current pressure of the gas storage device; if the current pressure is greater than or equal to the outlet design pressure of the current compressor, determines that the current compressor has completed the gas injection into the gas storage device; if the current pressure is less than the outlet design pressure of the current compressor, returns to the step of monitoring the periodic operation parameters of the current compressor in the current control cycle. In the above technical scheme, on the one hand, it is realized that the operation of the compressor is automatically adjusted according to the real-time working status of the compressor, so as to provide support for quickly completing the gas injection of the compressor into the gas storage device. On the other hand, the operation of the current compressor is controlled based on the compressor control parameters and the opening and closing scale of the gas injection regulating valve is adjusted based on the control parameters of the gas injection regulating valve, so that the operation of the current compressor can be accurately adjusted in real time according to the cycle operation parameters of the current cycle, and the gas injection regulating valve is used to cooperate with the operation of the current compressor based on the accurate control of the opening and closing scale of the gas injection regulating valve to achieve rapid gas injection of the gas storage device. At the same time, it can also avoid damage to the gas storage device or safety accidents caused by excessive pressure rise when the gas storage device is first injected. Finally, based on the current pressure of the gas storage device, it is determined whether the current compressor has completed the gas injection of the gas storage device, and it is automatically determined whether it is necessary to replace the compressor with a larger exhaust pressure as the current compressor to continue to inject gas into the gas storage device, or continue to detect the operating parameters of the current compressor, and further adjust the working state of the current compressor and the opening and closing scale of the gas injection regulating valve. The above method solves the problem that a set of gas injection compressor system needs to be used alone to inject gas into the gas storage device, and directly uses the series compressor unit of the compressed air energy storage system itself to achieve the first gas injection of the gas storage device, thereby reducing cost consumption and improving the efficiency of the first gas injection.

[0024] 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

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0026] Figure 1 A schematic flow chart of a method for controlling gas injection from a compressor to a gas storage device provided in an embodiment of the present invention;

[0027] Figure 2 An example diagram of the process structure of the energy storage process system provided by an embodiment of the present invention;

[0028] Figure 3 A schematic flow chart of another method for controlling gas injection from a compressor to a gas storage device provided in an embodiment of the present invention;

[0029] Figure 4 An example diagram of a blocking condition curve provided by an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of a control device for injecting gas from a compressor into a gas storage device provided by an embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of an air energy storage unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] 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.

[0033] It should be noted that the terms "current", "previous", etc. 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 variations thereof 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.

[0034] Figure 1A flow chart of a control method for injecting gas from a compressor into a gas storage device is provided in an embodiment of the present invention. This embodiment is applicable to the case where gas is injected into a gas storage device for the first time. The method can be executed by a control device for injecting gas from a compressor into a gas storage device. The control device for injecting gas from a compressor into a gas storage device can be implemented in the form of hardware and / or software. The control device for injecting gas from a compressor into a gas storage device can be configured in an air energy storage unit. In this embodiment, the air energy storage unit can be an execution subject such as an electronic device. For example, a computer or terminal device used in a compressed air energy storage process.

[0035] 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 60, an air injection regulating valve 70, a vent valve 80, an inlet shut-off valve 90 and an air storage device 100.

[0036] Among them, in the normal process, the air intake device 10 sucks in air and sends the air to the first compressor 20 on the process pipeline through the cooler 30. After the air is compressed by the first compressor, the air is sent to the heat exchanger 40, the heat generated by the compressed air is stored in the cold storage tank 60, and the compressed air is sent to the next compressor process. A compressor process generally includes a compressor, a cooler and a heat exchanger, and includes an anti-surge valve 50. After the compressed air comes out of the last compressor process, it will pass through the air injection regulating valve 70, the inlet shut-off valve 90 and the air storage device 100 respectively, so as to store the compressed air in the air storage device. Among them, the vent valve 80 is used to release the pressure in the air storage tank or pipeline to prevent equipment damage or accidents caused by excessive pressure.

[0037] Continue to refer Figure 1 .like Figure 1 As shown, the energy storage process system of this embodiment includes a compressor group, a gas storage device and an air energy storage unit. The compressor group includes at least three compressors connected in series. An air injection regulating valve is arranged on the process pipeline connecting the compressor group and the gas storage device. The air energy storage unit is electrically connected to each compressor, the gas storage device and the gas injection regulating valve respectively.

[0038] The method includes:

[0039] S101. When injecting gas into the gas storage device for the first time, start the current compressor.

[0040] Among them, the current compressor is a low-pressure compressor or a medium-pressure compressor. In this embodiment, the compressor of the compressor group can be divided into a low-pressure compressor and a medium-pressure compressor according to the exhaust pressure of the compressor. And, in general, there is also a high-pressure compressor, but the following method is only for the low-pressure compressor or the medium-pressure compressor. For example, Figure 2 The first compressor pair is used as the compressor of the low-pressure section, the second and third compressors are used as the compressors of the medium-pressure section, and the fourth compressor is used as the compressor of the high-pressure section.

[0041] Specifically, when the energy storage process system is turned on for the first time and the energy storage process system needs to be used for air compression, it is necessary to inject gas into the gas storage device so that the pressure of the gas storage device is gradually increased from the normal atmospheric pressure to the low operating pressure of the energy storage process system. Therefore, this process can be defined as "the first gas injection of the gas storage device". In this embodiment, when the gas storage device is injected with gas for the first time, the current compressor is started. Among them, at the beginning, the current compressor is the compressor of the low-pressure section. After the compressor in the low-pressure section determines that the gas injection of the gas storage device is completed according to the following method, the current compressor will be changed to the compressor of the medium-pressure section, and the following steps will be continued.

[0042] Exemplarily, the steps of starting the current compressor are as follows:

[0043] Open the shut-off valve at the inlet of the air storage device; close the vent valve at the outlet of the compressor whose exhaust pressure is lower than that of the current compressor; start the current compressor, at which time the current compressor is in an unloading state, the anti-surge valve corresponding to the current compressor is fully open, the current compressor is in normal operating speed, and the variable inlet stator blades and variable inlet guide vanes are in the minimum position; connect the air injection regulating valve, the compressor and the air energy storage unit, so that the air energy storage unit automatically controls the air injection regulating valve and the compressor.

[0044] S102: Monitor the periodic operating parameters of the current compressor in the current control period.

[0045] The periodic operation parameters are parameters of the current compressor during operation, for example, the blocking state of the compressor, the operating point pressure ratio of the compressor, and other parameters.

[0046] Specifically, after starting the current compressor, the operating parameters of the current compressor can be monitored in real time, or the periodic operating parameters of the current compressor in the current control period can be monitored according to a preset period.

[0047] S103, determining the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the pre-set preset design parameters.

[0048] Among them, the preset design parameters mainly include parameters related to the current compressor and parameters related to the gas storage device.

[0049] Specifically, according to the cycle operation parameters of the current compressor, the relevant operation parameters of the air storage device and the preset design parameters, the compressor control parameters of the air energy storage unit for controlling the current compressor in the current cycle can be determined. Also, according to the relevant operation parameters and preset parameters of the air storage device, the cycle operation parameters of the current compressor and the preset design parameters related to the current compressor, the air injection regulating valve control parameters of the air energy storage unit for controlling the air injection regulating valve in the current cycle can be determined.

[0050] For example, according to the preset design parameters of the gas storage device and the current load state, and based on whether the current compressor is in a blocked state, the compressor control parameters of the current cycle can be determined. And according to the working state of the current compressor in the current cycle, such as whether it is in a blocked state or an unblocked state, the gas injection regulating valve control parameters can be determined.

[0051] In this embodiment, based on the working status and operating parameters of the current compressor in the current cycle, it is determined that the air energy storage unit needs to control the gas injection regulating valve and the current compressor in the current cycle, thereby automatically adjusting the operation of the compressor according to the real-time working status of the compressor, thereby providing support for quickly completing the gas injection of the compressor into the gas storage device.

[0052] S104, controlling the operation of the current compressor according to the compressor control parameters, and adjusting the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters.

[0053] Specifically, after determining the compressor control parameters and the gas injection regulating valve control parameters of the current cycle, the air energy storage unit can send a control instruction to the current compressor based on the compressor control parameters, so that the current compressor continues to work in the current cycle according to the control instructions. And, the air energy storage unit can send a control instruction to the gas injection regulating valve based on the gas injection regulating valve control parameters, so that the gas injection regulating valve adjusts the opening and closing scale of the current cycle according to the control instructions, thereby cooperating with the work of the current compressor to achieve rapid gas injection of the gas storage device.

[0054] In this embodiment, the operation of the current compressor is controlled based on the compressor control parameters and the opening and closing scale of the gas injection regulating valve is adjusted based on the gas injection regulating valve control parameters, so that the operation of the current compressor is accurately adjusted in real time according to the cycle operation parameters of the current cycle, and the gas injection regulating valve is used to cooperate with the operation of the current compressor based on the accurate control of the opening and closing scale of the gas injection regulating valve to achieve rapid gas injection into the gas storage device. At the same time, it can also avoid damage to the gas storage device or safety accidents caused by excessive pressure rise when gas is first injected into the gas storage device.

[0055] S105: Obtain the current pressure of the gas storage device.

[0056] Specifically, after the operation of the current compressor and the opening and closing scale of the gas injection regulating valve are controlled based on the compressor control parameters and the gas injection regulating valve control parameters in the current cycle, the current pressure value of the gas storage device can be obtained.

[0057] S106, determining whether the current pressure is greater than or equal to the outlet design pressure of the current compressor; if so, executing S107; if not, returning to executing S102.

[0058] Specifically, since compressors of different pressure sections have their maximum exhaust pressure limits, it is necessary to monitor whether the current pressure of the gas storage device is greater than or equal to the outlet design pressure of the current compressor, that is, the exhaust pressure. That is, if the current pressure of the gas storage device is greater than or equal to the outlet design pressure of the current compressor, then using the current compressor to inject gas into the gas storage device cannot increase the current pressure of the gas storage device. Therefore, it is necessary to determine whether the current pressure is greater than or equal to the outlet design pressure of the current compressor. If the current pressure is greater than or equal to the outlet design pressure of the current compressor, it means that the current compressor has completed the gas injection into the gas storage device and cannot further increase the current pressure of the gas storage device. At this point, it can be determined to execute S107. If the current pressure is less than the outlet design pressure of the current compressor, it means that the current compressor can continue to increase the current pressure of the gas storage device, so it can return to execute S102.

[0059] S107, determining that the current compressor has completed gas injection into the gas storage device.

[0060] Specifically, if the current pressure is greater than or equal to the outlet design pressure of the current compressor, it means that the current compressor has completed the gas injection into the gas storage device, and it is determined that the current compressor has completed the gas injection into the gas storage device. At this time, it can be determined whether the current compressor is a compressor in the low-pressure section or a compressor in the medium-pressure section. If the current compressor is a compressor in the low-pressure section, the current compressor can be changed to a compressor in the medium-pressure section, and the step of starting the current compressor in S101 is returned to execute, so that the compressor in the medium-pressure section continues to inject gas into the gas storage device, thereby increasing the current pressure of the gas storage device. If the current compressor is a compressor in the medium-pressure section, the current compressor can be changed to a compressor in the high-pressure section. At this time, the compressor in the high-pressure section can be directly controlled to work normally.

[0061] In this embodiment, based on the current pressure of the gas storage device, it is determined whether the current compressor has completed the gas injection of the gas storage device, and it is realized to automatically determine whether it is necessary to replace the compressor with a higher exhaust pressure as the current compressor to continue to inject gas into the gas storage device, or continue to detect the operating parameters of the current compressor, and further adjust the working state of the current compressor and the opening and closing scale of the gas injection regulating valve. The above method solves the problem that a separate gas injection compressor system is currently required to inject gas into the gas storage device, and directly uses the series compressor unit of the compressed air energy storage system itself to realize the first gas injection of the gas storage device, thereby reducing cost consumption and improving the efficiency of the first gas injection.

[0062] The control method for the compressor to inject gas into the gas storage device provided in the embodiment of the present invention starts the current compressor when injecting gas into the gas storage device for the first time, and monitors the periodic operation parameters of the current compressor in the current control cycle; determines the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the periodic operation parameters and the preset design parameters; controls the operation of the current compressor according to the compressor control parameters, and adjusts the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters; obtains the current pressure of the gas storage device; if the current pressure is greater than or equal to the outlet design pressure of the current compressor, determines that the current compressor has completed the gas injection into the gas storage device; if the current pressure is less than the outlet design pressure of the current compressor, returns to the step of monitoring the periodic operation parameters of the current compressor in the current control cycle. In the above technical scheme, on the one hand, it is realized that the operation of the compressor is automatically adjusted according to the real-time working status of the compressor, so as to provide support for quickly completing the gas injection of the compressor into the gas storage device. On the other hand, the operation of the current compressor is controlled based on the compressor control parameters and the opening and closing scale of the gas injection regulating valve is adjusted based on the control parameters of the gas injection regulating valve, so that the operation of the current compressor can be accurately adjusted in real time according to the cycle operation parameters of the current cycle, and the gas injection regulating valve is used to cooperate with the operation of the current compressor based on the accurate control of the opening and closing scale of the gas injection regulating valve to achieve rapid gas injection of the gas storage device. At the same time, it can also avoid damage to the gas storage device or safety accidents caused by excessive pressure rise when the gas storage device is first injected. Finally, based on the current pressure of the gas storage device, it is determined whether the current compressor has completed the gas injection of the gas storage device, and it is automatically determined whether it is necessary to replace the compressor with a larger exhaust pressure as the current compressor to continue to inject gas into the gas storage device, or continue to detect the operating parameters of the current compressor, and further adjust the working state of the current compressor and the opening and closing scale of the gas injection regulating valve. The above method solves the problem that a set of gas injection compressor system needs to be used alone to inject gas into the gas storage device, and directly uses the series compressor unit of the compressed air energy storage system itself to achieve the first gas injection of the gas storage device, thereby reducing cost consumption and improving the efficiency of the first gas injection.

[0063] Figure 3This is a flow chart of another control method for a compressor to inject gas into a gas storage device provided by an embodiment of the present invention. Based on the above embodiment, this embodiment introduces in detail the steps of "determining the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters" and "after determining that the current compressor has completed the gas injection into the gas storage device". Figure 3 As shown, the method includes:

[0064] S301. When injecting gas into the gas storage device for the first time, start the current compressor.

[0065] Among them, the exhaust pressure of the compressor in the low-pressure section is lower than the exhaust pressure of the compressor in the medium-pressure section, and the exhaust pressure of the compressor in the medium-pressure section is lower than the exhaust pressure of the compressor in the high-pressure section. When the current compressor injects gas into the gas storage device, the compressor with an exhaust pressure lower than the current compressor is turned on, and the compressor with an exhaust pressure higher than the current compressor is turned off.

[0066] Specifically, the steps for starting the current compressor are as follows:

[0067] Open the shut-off valve at the inlet of the air storage device; close the vent valve at the outlet of the compressor whose exhaust pressure is lower than that of the current compressor; start the current compressor, at which time the current compressor is in an unloading state, the anti-surge valve corresponding to the current compressor is fully open, the current compressor is in normal operating speed, and the variable inlet stator blades and variable inlet guide vanes are in the minimum position; connect the air injection regulating valve, the compressor and the air energy storage unit, so that the air energy storage unit automatically controls the air injection regulating valve and the compressor.

[0068] For example, under normal control, the variable inlet stator vanes and the variable inlet guide vanes are controlled by pressure or flow, and the anti-surge valve is controlled by anti-surge. As the low-pressure section anti-surge valve gradually closes, the variable inlet stator vanes and the variable inlet guide vanes gradually become larger.

[0069] S302: Monitor the periodic operating parameters of the current compressor in the current control period.

[0070] Specifically, the inlet pressure, outlet pressure, equivalent flow rate, operating point temperature, etc. of the current compressor in the current control cycle can be monitored as periodic operation parameters.

[0071] S303: Determine the current blocking state of the compressor according to the periodic operation parameters and the preset parameters of the compressor.

[0072] The preset design parameters include compressor preset parameters. The periodic operation parameters include the pressure ratio and mass flow parameters of the compressor working point. The compressor preset parameters include the blocking condition curve.

[0073] Specifically, the current blocking state of the compressor can be determined according to the following steps:

[0074] (1) According to the mass flow parameter, the current equivalent flow rate of the current compressor at the compressor operating point is determined.

[0075] Specifically, the mass flow parameter of the current compressor can be calculated according to the following formula:

[0076]

[0077] Where W is the mass flow rate of the current compressor operating point, C air is the discharge coefficient of compressed air, ε air is the expansion coefficient of compressed air, d1 is the inner diameter of the orifice plate at the compressor, β1=d1 / D1, where D1 is the inner diameter of the upstream and downstream pipelines of the compressor, △P1 is the pressure difference of the orifice plate at the compressor, and ρ air is the fluid density of compressed air in the current cycle.

[0078] Specifically, according to the mass flow parameter, the current equivalent flow rate of the current compressor at the compressor operating point is determined, which can be calculated according to the following formula:

[0079]

[0080] Among them, T is the actual temperature of the current compressor operating point, P is the actual pressure of the current operating point, T0 parameter is the temperature of the current compressor under the standard state, and P0 is the pressure of the current compressor under the standard state.

[0081] (2) According to the pressure ratio of the compressor operating point and the blocking condition curve, the first standard equivalent flow rate and the second standard equivalent flow rate of the current compressor at the compressor operating point are determined.

[0082] The first standard equivalent flow rate is the equivalent flow rate of the blocking high line STHL corresponding to the pressure ratio of the compressor working point under the standard state. The second standard equivalent flow rate is the equivalent flow rate of the blocking low line STLL corresponding to the pressure ratio of the compressor working point under the standard state.

[0083] Specifically, in one implementation, the pressure ratio of the compressor operating point can be calculated according to the following formula:

[0084]

[0085] Among them, P s is the current compressor inlet pressure, P d is the current compressor outlet pressure.

[0086] In another implementation, the pressure ratio may also be calculated by measuring the current suction and discharge pressures of the compressor.

[0087] Specifically, Figure 4 This is an example of a blocking condition curve provided by an embodiment of the present invention. Figure 4 As shown in FIG. 1 , various blocking operating condition curves under general operating conditions are shown. For example, Figure 4 In the coordinate diagram shown, the horizontal axis is the standard equivalent mass flow rate, and the vertical axis is the pressure ratio. Also, example curves of the surge control line SCL, the blocking low line STLL, the blocking high line STHL and the blocking line STL are shown. Among them, if a certain blocking operating condition line is used, the standard equivalent mass flow rate will correspond to the blocking operating condition. For example, if the curve of the blocking high line STHL is used to calculate the standard equivalent flow rate corresponding to the pressure ratio of the working point, the standard equivalent flow rate corresponds to the standard equivalent flow rate of the blocking high line.

[0088] Specifically, firstly, according to the pressure ratio of the compressor working point, the equivalent flow rate of the corresponding blocking line STL under the standard state is calculated, and the formula is as follows:

[0089] m cor_STL =F1(R C );

[0090] Among them, F1(x) is the function corresponding to the blocking line curve.

[0091] Secondly, the first standard equivalent flow rate and the second standard equivalent flow rate are determined according to the equivalent flow rate of the blocking line STL under the standard state corresponding to the pressure ratio of the compressor working point, the margin of the equivalent mass flow rate of the blocking line STL and the blocking high line STHL under the standard state, and the margin of the equivalent mass flow rate of the blocking line STL and the blocking low line STLL under the standard state. The calculation formula is as follows:

[0092] m cor_STHL =m cor_STL -Δm cor_STHL ;

[0093] m cor_STLL =m cor_STL -Δm cor_STLL ;

[0094] Among them, the first standard equivalent flow is m cor_STHL The second standard equivalent flow rate is m cor_STLL . Δm cor_STHL is the margin of the mass flow rate of the blocking line STL and the blocking high line STHL under standard conditions, Δm cor_STLL It is the margin of mass flow converted between the blocking line STL and the blocking high line STLL under standard conditions.

[0095] Specifically, after determining the current equivalent flow, the first standard equivalent flow, and the second standard equivalent flow, the magnitude relationship between the current equivalent flow, the first standard equivalent flow, and the second standard equivalent flow can be determined respectively, thereby determining the current blockage state of the compressor. Specifically as follows:

[0096] (3-1) when the current equivalent flow rate is greater than the first standard equivalent flow rate, determining that the current blocking state of the compressor is blocking;

[0097] Specifically, if m cor >m cor_STHL , it is determined that the current blocking state of the compressor is blocked.

[0098] (3-2) When the current equivalent flow rate is less than the second standard equivalent flow rate, it is determined that the current blocking state of the compressor is non-blocking.

[0099] Specifically, if m cor <m cor_STLL , it is determined that the current blocking state of the compressor is non-blocking.

[0100] Also, since the compressor of the low-pressure section or the compressor of the medium-pressure section includes more than one compressor, that is, the compressor of the low-pressure section may include one or more compressors, and the compressor of the medium-pressure section may include one or more compressors, therefore, when determining whether the compressor of the low-pressure section or the compressor of the medium-pressure section is in a blocked state, it is necessary to determine the blocked state of all compressors in this pressure section. If the blocked state of all compressors in this pressure section is non-blocked, it can be determined that the compressor group is in a non-blocked state. If the blocked state of at least one compressor in this pressure section is blocked, it is determined that the compressor group is in a blocked state.

[0101] And, when it is determined that the compressor unit is in a blocked state, it can be determined that the air injection load control of the air energy storage unit is in a decoupled state. When it is determined that the compressor unit is in a non-blocked state, it can be determined that the air injection load control of the air energy storage unit is in a non-decoupled state.

[0102] In this embodiment, based on the periodic operating parameters of the current compressor and different blockage curves, it is determined whether the current compressor is in a blocked state, thereby providing a basis for subsequently determining the gas injection regulating valve control parameters for controlling the gas injection regulating valve according to the different blockage states of the current compressor, thereby achieving accurate determination of the gas injection regulating valve control parameters according to the blockage state of the compressor, so that the adjusted gas injection regulating valve can better cooperate with the gas injection work of the current compressor.

[0103] S304: Determine a load control parameter for controlling the gas storage device according to the gas storage operation parameter of the gas storage device and the preset control parameter.

[0104] Among them, the preset design parameters also include preset control parameters of the gas storage device.

[0105] Specifically, the real-time monitored gas storage operation parameters are obtained, and the real-time monitoring value ZIC of the gas storage device received by the air energy storage unit is determined. PV .

[0106] For example, if the gas storage operation parameter is pressure, the real-time monitoring value is the actual pressure P of the gas storage device monitored. storage .Right now:

[0107] ZIC PV =P storage ;

[0108] If the gas storage operation parameter is flow rate, the real-time monitoring value is the actual pressure F of the gas storage device monitored. storage .Right now:

[0109]

[0110] Among them, C air is the discharge coefficient of compressed air, ε air is the expansion coefficient of compressed air, d2 is the inner diameter of the orifice plate at the gas storage device, β2=d2 / D2, where D2 is the inner diameter of the upstream and downstream pipelines of the gas storage device, △P2 is the pressure difference of the orifice plate at the gas storage device, ρ air is the fluid density of compressed air in the current cycle.

[0111] Specifically, after determining the real-time monitoring value ZIC of the air storage device received by the air energy storage unit PV Afterwards, the air energy storage unit can control the target value ZIC of the gas injection load according to the preset control parameters. SP Calculate the output value ZIC of the air energy storage unit controlling the gas injection load in the current cycle OUT The calculation formula is as follows:

[0112] x=ZIC SP -ZIC PV ;

[0113] ZIC OUT =x*F2(x)*ΔZIC;

[0114] Where x is the target value ZIC of the air energy storage unit to control the gas injection load SP With real-time monitoring value ZIC PV F2(x) is the proportional correction coefficient, which is used to correct the difference.

[0115] S305. Determine the control parameters of the gas injection regulating valve according to the current blockage state and load control parameters of the compressor; and obtain the performance control index of the current compressor, and determine the compressor control parameters according to the performance control index, the compressor preset parameters and the load control parameters.

[0116] Specifically, the steps for determining the control parameters of the gas injection regulating valve are as follows:

[0117] (1) Determine a first decoupling value according to the current blocking state of the compressor.

[0118] The first decoupling value is a decoupling value determined according to the current blocking state of the compressor.

[0119] Specifically, in one implementation, if the current compressor is in a decoupled state, that is, the current compressor is in a blocked state, then the decoupling coefficient C of the anti-surge valve can be set according to the preset ASC The output value ZIC of the air energy storage unit controlling the gas injection load in the current cycle OUT Determine the first decoupling value. For example:

[0120] LDC ZVC =-1*ZIC OUT *C ASC ;

[0121] In another implementation, if the current compressor is in a non-decoupling state, that is, the current compressor is in a non-blocking state, then the decoupling coefficient C ASC The output value ZIC of the air energy storage unit controlling the gas injection load in the current cycle OUT Determine the first decoupling value. For example:

[0122] LDC ZVC =ZIC OUT *C ASC ;

[0123] (2) Obtaining the control parameters of the gas injection regulating valve in the previous cycle, and determining the control parameters of the gas injection regulating valve according to the first decoupling value and the control parameters of the gas injection regulating valve in the previous cycle.

[0124] Specifically, obtain the gas injection regulating valve control parameter ZVC of the previous cycle OUT (n-1), and according to the first decoupling value LDC ZVC Compared with the gas injection regulating valve control parameter ZVC of the previous cycle OUT (n-1), determine the control parameter ZVC of the gas injection regulating valve OUT (n), for example:

[0125] ZV OUT (n) = LDC ZVC +ZVCOUT (n-1);

[0126] Among them, n is the current cycle and n-1 is the previous cycle.

[0127] And, the compressor preset parameters include the performance control rated parameters of the compressor, and the steps of determining the compressor control parameters are as follows:

[0128] (1) obtaining a decoupling coefficient, and determining a second decoupling value according to the decoupling coefficient and a load control parameter;

[0129] The decoupling coefficient is the decoupling coefficient of the gas injection load control to the performance control in the air energy storage unit. The second decoupling value is the decoupling value of the gas injection load control to the performance control in the air energy storage unit.

[0130] Specifically, the decoupling coefficient C is obtained PIC , and according to the decoupling coefficient C PIC and load control parameter ZIC OUT Determine the second decoupling value. For example:

[0131] LDC PIC =ZIC OUT *C PIC ;

[0132] (2) Determine the compressor control parameter according to the second decoupling value, the performance control index and the performance control rated parameter.

[0133] The performance control index is an index used to control the compressor control parameters to achieve normalization. The performance control rated parameter is used to determine the range of the performance control index.

[0134] Specifically, in order to determine the compressor control parameters, it is necessary to first determine the performance control index and the performance control rated parameters.

[0135] For example, the performance control rated parameter is a value between 0 and 100, representing an adjustable range within which the performance of the current compressor can be controlled. The performance control rated parameter is calculated as follows:

[0136]

[0137] Among them, PIC is the actual feedback value of the performance control received by the air energy storage unit after controlling the current compressor, PIC MAX The maximum adjustable capability value of performance control; PIC MIN The minimum adjustable capacity value for performance control.

[0138] And, the calculation formula of the performance control index is as follows:

[0139] PIC OP(n) = LDC PIC (n)+PIC OP (n-1);

[0140] Among them, n is the current cycle, n-1 is the previous cycle, PIC OP (n-1) is the performance control index of the previous cycle.

[0141] Therefore, the calculation formula for determining the compressor control parameters is as follows:

[0142]

[0143] Therefore, according to the above, the compressor control parameter PIC of the current cycle can be obtained: OUT (n).

[0144] S306: Control the operation of the current compressor according to the compressor control parameters, and adjust the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters.

[0145] Specifically, after determining the compressor control parameters and the gas injection regulating valve control parameters of the current cycle, the air energy storage unit can send a control instruction to the current compressor based on the compressor control parameters, so that the current compressor continues to work in the current cycle according to the control instructions. And, the air energy storage unit can send a control instruction to the gas injection regulating valve based on the gas injection regulating valve control parameters, so that the gas injection regulating valve adjusts the opening and closing scale of the current cycle according to the control instructions, thereby cooperating with the work of the current compressor to achieve rapid gas injection of the gas storage device.

[0146] S307: Obtain the current pressure of the gas storage device.

[0147] Specifically, after the operation of the current compressor and the opening and closing scale of the gas injection regulating valve are controlled based on the compressor control parameters and the gas injection regulating valve control parameters in the current cycle, the current pressure value of the gas storage device can be obtained.

[0148] S308, determine whether the current pressure is greater than or equal to the outlet design pressure of the current compressor; if so, execute S309; ​​if not, return to execute S302.

[0149] Specifically, determine whether the current pressure is greater than or equal to the outlet design pressure of the current compressor. If the current pressure is greater than or equal to the outlet design pressure of the current compressor, it means that the current compressor has completed the gas injection of the gas storage device and the current pressure of the gas storage device cannot be further increased. At this time, it can be determined to execute S309. If the current pressure is less than the outlet design pressure of the current compressor, it means that the current compressor can continue to increase the current pressure of the gas storage device, so it can return to execute S302.

[0150] S309: Determine that the current compressor has completed gas injection into the gas storage device.

[0151] Specifically, if the current pressure is greater than or equal to the outlet design pressure of the current compressor, it means that the current compressor has completed the gas injection into the gas storage device, and it is determined that the current compressor has completed the gas injection into the gas storage device.

[0152] S310, determining whether the current compressor is a compressor of the medium pressure section; if so, executing S311; if not, executing S312.

[0153] Specifically, it is necessary to determine whether the current compressor is a compressor of the medium pressure section, and if the current compressor is a compressor of the medium pressure section, S311 can be executed. If the current compressor is a compressor of the low pressure section, S312 can be executed.

[0154] S311. Start the compressor of the high-pressure section and control the compressor of the high-pressure section to work normally.

[0155] Specifically, if it is determined that the current compressor is a compressor of the medium pressure section, it means that the compressor of the low pressure section and the compressor of the medium pressure section have completed the process of injecting gas into the gas storage device. At this time, the compressor of the high pressure section can be directly turned on and directly controlled to work normally.

[0156] S312: Use the compressor of the medium-pressure section as the current compressor, and return to execute S301.

[0157] Specifically, if it is determined that the current compressor is not a compressor in the medium-pressure section, that is, the current compressor is a compressor in the low-pressure section, at this time, the current compressor can be changed to a compressor in the medium-pressure section, and return to execute the step of "starting the current compressor" in S301, and execute the above process again.

[0158] In this embodiment, according to whether the working point of the current compressor is in a blocked or non-blocked state, the corresponding first decoupling value is calculated respectively, and the control parameter of the gas injection regulating valve is calculated based on the decoupling value, so as to realize the use of the gas injection regulating valve to assist the operation of the current compressor. At the same time, based on the load control parameter of the current compressor, the second decoupling value is determined, and the compressor control parameter for controlling the operation of the current compressor is determined based on the second decoupling value, thereby realizing the control of the operation of the compressor. Based on the control of the operation of the compressor and based on the control of the gas injection regulating valve to assist the operation of the compressor, the first gas injection of the gas storage device in the air compression system using the entire compressor unit is realized.

[0159] The control method for the compressor to inject gas into the gas storage device provided by the embodiment of the present invention, on the one hand, determines whether the current compressor is in a blocked state according to the periodic operation parameters of the current compressor and different blocking curves, and provides a basis for determining the control parameters of the gas injection regulating valve for controlling the gas injection regulating valve according to the different blocking states of the current compressor, and realizes the accurate determination of the control parameters of the gas injection regulating valve according to the blocking state of the compressor, so that the adjusted gas injection regulating valve can better cooperate with the gas injection work of the current compressor. On the other hand, according to whether the working point of the current compressor is in a blocked or non-blocked state, the corresponding first decoupling value is calculated respectively, and the control parameters of the gas injection regulating valve are calculated based on the decoupling value, so as to realize the use of the gas injection regulating valve to assist the work of the current compressor. At the same time, based on the load control parameters of the current compressor, the second decoupling value is determined, and the compressor control parameters for controlling the work of the current compressor are determined based on the second decoupling value, so as to realize the control of the work of the compressor. Based on the control of the work of the compressor and based on the control of the gas injection regulating valve to assist the work of the compressor, the first gas injection of the gas storage device in the air compression system using the entire compressor group is realized.

[0160] In the above embodiment, a simple example is used to introduce the overall process of the control method of injecting gas from a compressor into a gas storage device.

[0161] First, design the operating parameters of the gas storage device, and its minimum inflation pressure is P _storage_MIN , the maximum inflation pressure is P _storage_MAX For example, the parameters shown in Table 1 below are used as an example:

[0162] Table 1 Design parameters of gas storage device

[0163] parameter Salt Cave Pipeline Steel First injection pressure 6.54Mpa(A) 7.31Mpa(A) <![CDATA[Minimum inflation pressure P _storage_MIN > 6.54Mpa(A) 7.31Mpa(A) <![CDATA[Maximum inflation pressure P _storage_MAX > 9.85Mpa(A) 10.55Mpa(A)

[0164] Among them, salt caverns and pipeline steels are different gas storage devices.

[0165] Secondly, design the operating parameters of each compressor, as follows:

[0166] (1) The outlet design pressure P of the low-pressure compressor under rated conditions d_1MAX , the minimum adjustable pressure of the low pressure section at the outlet under rated conditions d _1MIN ;

[0167] (2) The outlet design pressure P of the intermediate pressure compressor under rated conditions d_2MAX , the minimum adjustable outlet pressure of the medium pressure section under rated conditions d _2MIN ;

[0168] (3) The outlet design pressure P of the high-pressure compressor under rated conditions d_3MAX , the minimum adjustable pressure of the high pressure section at the outlet under rated conditions d_3MIN ;

[0169] For example, the parameters shown in Table 2 are as follows:

[0170] Table 2 Design parameters of each compressor section

[0171]

[0172] After designing the above-mentioned pre-set design parameters, open the shut-off valve on the inlet of the gas storage device, close the outlet vent valves of the compressor in the medium-pressure section and the compressor in the high-pressure section, and start the compressor in the low-pressure section. At this time, the compressor in the low-pressure section is in an unloaded state, the anti-surge valve is fully open, the unit is in normal operating speed, and the variable inlet stator blades / variable inlet guide vanes are in the minimum position. The air energy storage unit initiates automatic control instructions to the gas injection regulating valve and the compressor, and the air energy storage unit can automatically control the operation of the gas injection regulating valve and the compressor. At this time, the target value ZIC for the air energy storage unit to control the gas injection load is set SP When the gas injection load parameter is pressure, the gas injection load target value ZIC SP The outlet design pressure P of the low-pressure compressor under rated conditions d_1MAX When the gas injection load parameter is flow rate, the gas injection load target value ZIC SP The air energy storage unit determines the compressor control parameters and the air injection regulating valve control parameters according to the scheme of the above embodiment, and continuously adjusts the compressor control parameters and the air injection regulating valve control parameters according to the current working state of the compressor, such as whether the current compressor is in a blocked state, until the pressure P of the air storage device reaches _storage Greater than the outlet design pressure P of the compressor at rated working condition of the low pressure section d_1MAX , start the gas injection work of the compressor in the medium pressure section, and control the operation of the compressor in the medium pressure section according to the above process until the pressure of the gas storage device reaches P _storage Greater than the outlet design pressure P of the medium pressure compressor under rated working conditions d_2MAX The series compressor unit can operate normally according to the compressed air energy storage system, that is, the compressor in the high-pressure section can be turned on and operate normally.

[0173] Figure 5 A schematic diagram of the structure of a control device for injecting gas from a compressor to a gas storage device provided in an embodiment of the present invention. Figure 5 As shown, the device comprises:

[0174] The monitoring module 501 is used to start the current compressor when the gas storage device is first injected with gas, and monitor the periodic operating parameters of the current compressor in the current control cycle, wherein the current compressor is a compressor of a low-pressure section or a compressor of a medium-pressure section;

[0175] A determination module 502 is used to determine the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters;

[0176] The regulating module 503 is used to control the operation of the current compressor according to the compressor control parameters, and to adjust the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameters;

[0177] The judgment module 504 is used to obtain the current pressure of the gas storage device; if the current pressure is greater than or equal to the outlet design pressure of the current compressor, it is determined that the gas injection of the current compressor into the gas storage device is completed; if the current pressure is less than the outlet design pressure of the current compressor, it returns to the step of monitoring the periodic operating parameters of the current compressor in the current control cycle.

[0178] Optionally, the preset design parameters include preset parameters of the compressor and preset control parameters of the gas storage device, and the determination module 502 is specifically used to:

[0179] Determine the blockage state of the current compressor based on the cycle operation parameters and the preset parameters of the compressor; determine the load control parameters for controlling the gas storage device based on the gas storage operation parameters and the preset control parameters of the gas storage device; determine the control parameters of the gas injection regulating valve based on the blockage state and load control parameters of the current compressor; and obtain the performance control index of the current compressor, and determine the compressor control parameters based on the performance control index, the preset parameters of the compressor and the load control parameters.

[0180] Optionally, the periodic operation parameters include the pressure ratio and mass flow parameters of the compressor operating point, and the compressor preset parameters include the blocking condition curve. The determination module 502 is specifically used for:

[0181] According to the mass flow parameters, the current equivalent flow of the current compressor at the compressor operating point is determined; according to the pressure ratio and the blocking operating condition curve of the compressor operating point, the first standard equivalent flow and the second standard equivalent flow of the current compressor at the compressor operating point are determined; when the current equivalent flow is greater than the first standard equivalent flow, the blocking state of the current compressor is determined to be blocked; when the current equivalent flow is less than the second standard equivalent flow, the blocking state of the current compressor is determined to be non-blocking.

[0182] Optionally, the air injection regulating valve control parameter is determined according to the current blocking state and load control parameter of the compressor, and the determination module 502 is specifically used for:

[0183] Determine a first decoupling value according to the current blocking state of the compressor; obtain the air injection regulating valve control parameter of the previous cycle, and determine the air injection regulating valve control parameter according to the first decoupling value and the air injection regulating valve control parameter of the previous cycle.

[0184] Optionally, the compressor preset parameters include performance control rated parameters of the compressor; the compressor control parameters are determined according to the performance control index, the compressor preset parameters and the load control parameters, and the determination module 502 is specifically used to:

[0185] A decoupling coefficient is obtained, and a second decoupling value is determined according to the decoupling coefficient and the load control parameter; and a compressor control parameter is determined according to the second decoupling value, the performance control index and the performance control rated parameter.

[0186] Optionally, after determining that the current compressor has completed gas injection into the gas storage device, the judgment module 504 is further configured to:

[0187] If the current compressor is a compressor in the low-pressure section, the compressor in the medium-pressure section is used as the current compressor, and the step of starting the current compressor is returned to; if the current compressor is a compressor in the medium-pressure section, the compressor in the high-pressure section is turned on, and the compressor in the high-pressure section is controlled to work normally.

[0188] The control device for injecting gas from a compressor into a gas storage device provided in an embodiment of the present invention can execute the control method for injecting gas from a compressor into a gas storage device provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0189] Figure 6 It is a structural schematic diagram of the air energy storage unit 6 of an embodiment of the present invention. In the present embodiment, the air energy storage unit is 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, workbenches, 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.

[0190] like Figure 6As shown, the air energy storage unit 6 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 RAM 13, various programs and data required for the operation of the air energy storage unit 6 can also be stored. The processor 11, ROM 12 and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0191] A number of components in the air energy storage unit 6 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 air energy storage unit 6 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0192] 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, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a control method for a compressor to inject gas into a gas storage device.

[0193] In some embodiments, the control method of the compressor injecting gas into the gas storage device 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 air energy storage unit 6 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 of the compressor injecting gas into the gas storage device described above can be executed. Alternatively, in other embodiments, the processor 11 can be configured to execute the control method of the compressor injecting gas into the gas storage device in any other appropriate manner (for example, by means of firmware).

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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).

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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 a compressor to inject gas into a gas storage device, characterized in that: The energy storage process system includes a compressor unit, a gas storage device and an air energy storage unit, wherein the compressor unit includes at least three compressors connected in series, and a gas injection regulating valve is arranged on the process pipeline connecting the compressor unit and the gas storage device, and the air energy storage unit is electrically connected to each of the compressors, the gas storage device and the gas injection regulating valve respectively; The method is applied to the air energy storage unit, and the method comprises: When the gas storage device is first injected with gas, the current compressor is started, and the periodic operation parameters of the current compressor in the current control cycle are monitored, wherein the current compressor is a compressor in a low-pressure section or a compressor in a medium-pressure section; Determining the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters; Controlling the operation of the current compressor according to the compressor control parameter, and adjusting the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameter; Obtaining the current pressure of the gas storage device; If the current pressure is greater than or equal to the outlet design pressure of the current compressor, it is determined that the gas injection of the current compressor into the gas storage device is completed; If the current pressure is less than the outlet design pressure of the current compressor, the process returns to the step of monitoring the periodic operating parameters of the current compressor in the current control cycle.

2. The method for controlling the compressor to inject gas into the gas storage device according to claim 1, characterized in that: The preset design parameters include preset parameters of the compressor and preset control parameters of the gas storage device; Determining the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters, includes: Determining the blocking state of the current compressor according to the periodic operation parameters and the preset parameters of the compressor; Determining a load control parameter for controlling the gas storage device according to the gas storage operation parameter of the gas storage device and the preset control parameter; Determine the air injection regulating valve control parameter according to the blockage state of the current compressor and the load control parameter; and obtain the performance control index of the current compressor, and determine the compressor control parameter according to the performance control index, the compressor preset parameters and the load control parameter.

3. The method for controlling the compressor to inject gas into the gas storage device according to claim 2, characterized in that: The periodic operation parameters include the pressure ratio and mass flow parameters of the compressor operating point, and the compressor preset parameters include the blocking condition curve; The determining the blocking state of the current compressor according to the periodic operation parameter and the preset parameter of the compressor includes: determining a current equivalent flow rate of the current compressor at a compressor operating point according to the mass flow parameter; Determining a first standard reduced flow rate and a second standard reduced flow rate of the current compressor at the compressor operating point according to the pressure ratio of the compressor operating point and the blocking operating condition curve; When the current equivalent flow rate is greater than the first standard equivalent flow rate, determining that the current blocking state of the compressor is blocking; When the current reduced flow rate is less than the second standard reduced flow rate, it is determined that the current blocking state of the compressor is non-blocking.

4. The method for controlling the compressor to inject gas into the gas storage device according to claim 2, characterized in that: The step of determining the gas injection regulating valve control parameter according to the current compressor blocking state and the load control parameter includes: determining a first decoupling value according to the current blocking state of the compressor; The gas injection regulating valve control parameter of the previous cycle is obtained, and the gas injection regulating valve control parameter is determined according to the first decoupling value and the gas injection regulating valve control parameter of the previous cycle.

5. The method for controlling the compressor to inject gas into the gas storage device according to claim 2, characterized in that: The compressor preset parameters include the performance control rated parameters of the compressor; and determining the compressor control parameters according to the performance control index, the compressor preset parameters and the load control parameters includes: Obtaining a decoupling coefficient, and determining a second decoupling value according to the decoupling coefficient and the load control parameter; The compressor control parameter is determined according to the second decoupling value, the performance control index and the performance control rated parameter.

6. The method for controlling the compressor to inject gas into the gas storage device according to claim 1, characterized in that: After determining that the current compressor has completed gas injection into the gas storage device, the method further includes: If the current compressor is a compressor in the low-pressure section, the compressor in the medium-pressure section is used as the current compressor, and the step of starting the current compressor is returned to; If the current compressor is a compressor of the medium-pressure section, the compressor of the high-pressure section is turned on, and the compressor of the high-pressure section is controlled to work normally.

7. The method for controlling the compressor to inject gas into the gas storage device according to claim 6, characterized in that: The exhaust pressure of the compressor in the low-pressure section is lower than the exhaust pressure of the compressor in the medium-pressure section, and the exhaust pressure of the compressor in the medium-pressure section is lower than the exhaust pressure of the compressor in the high-pressure section; When the current compressor injects gas into the gas storage device, the compressor with a lower exhaust pressure than the current compressor is turned on, and the compressor with a higher exhaust pressure than the current compressor is turned off.

8. A control device for injecting gas from a compressor into a gas storage device, characterized in that: The device is arranged in the air energy storage unit, and the device comprises: A monitoring module, used for starting the current compressor when the gas storage device is first injected with gas, and monitoring the periodic operating parameters of the current compressor in the current control cycle, wherein the current compressor is a compressor of a low-pressure section or a compressor of a medium-pressure section; A determination module, used to determine the compressor control parameters and the gas injection regulating valve control parameters of the current cycle according to the cycle operation parameters and the preset design parameters; A regulating module, used to control the operation of the current compressor according to the compressor control parameter, and to adjust the opening and closing scale of the gas injection regulating valve according to the gas injection regulating valve control parameter; A judgment module is used to obtain the current pressure of the air storage device; if the current pressure is greater than or equal to the outlet design pressure of the current compressor, it is determined that the current compressor has completed the gas injection into the air storage device; if the current pressure is less than the outlet design pressure of the current compressor, it returns to the step of monitoring the periodic operating parameters of the current compressor in the current control cycle.

9. An air energy storage 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 the compressor to inject gas into the gas storage device 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 the compressor to inject gas into a gas storage device according to any one of claims 1 to 7 is implemented.

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