A turbine valve control method, device, control unit and medium

Abstract

This invention discloses a control method, device, control unit, and medium for turbine unit valves, comprising: acquiring operating status events of the turbine unit, and determining flow control parameters of the turbine unit when the operating status event is triggered; determining flow distribution output parameters corresponding to the regulating valve and flow distribution output parameters corresponding to each air supply valve based on the flow control parameters and valve flow distribution coefficients; determining the valve control output value of the regulating valve based on the valve flow characteristic relationship of the regulating valve and the flow distribution output parameters corresponding to the regulating valve; determining the valve control output value of each air supply valve based on the valve flow characteristic relationship of each air supply valve and the flow distribution output parameters corresponding to each air supply valve; controlling the valve opening of the regulating valve according to the valve control output value of the regulating valve; and controlling the valve opening of the corresponding air supply valve according to the valve control output value of each air supply valve. This invention achieves automatic control of turbine unit valves.

Description

Technical Field

[0001] This invention relates to the field of compressed air energy storage technology, and in particular to a control method, device, control unit and medium for turbine unit valves. Background Technology

[0002] Compressed air energy storage releases high-pressure gas from the storage device during the energy release phase. This gas is heated by a heat exchanger and then delivered to the turbine unit, enabling it to drive a generator to produce electricity. During this process, the gas release from the storage device causes its own pressure to gradually decrease, resulting in a drop in the turbine unit's operating power. Currently, to ensure stable power output during the turbine unit's sliding pressure operation, a turbine throttling and supplementary gas operation mode is typically used to control the turbine unit's stable operation.

[0003] However, the turbine throttling and supplemental air operation mode relies on a comprehensive assessment of the turbine unit's power output and valve status to control the turbine during operation. Under this mode, when changes in compressor air parameters cause the turbine unit's power generation to exceed limits, the control device will force all regulating valves and supplemental air valves to close synchronously to the normal range, and all valves will remain stationary after closing to the normal range. This results in a reduction in the turbine unit's subsequent operating efficiency. Summary of the Invention

[0004] This invention provides a control method, device, control unit, and medium for turbine unit valves. It enables individual control of regulating valves and individual control of each air supply valve based on different operating state events during the operation of the turbine unit. This achieves automatic control of the turbine unit's workload and flow rate, thereby ensuring stable operation of the turbine unit and improving its operating efficiency.

[0005] According to one aspect of the present invention, a method for controlling valves of a turbine unit is provided. The compressed air energy storage system includes a turbine unit, an air storage device, a regulating valve, a make-up air valve, and a valve control unit. The turbine unit and the air storage device are connected via a main pipeline, and the regulating valve is disposed between the turbine unit and the air storage device. The turbine unit includes at least three turbine expanders connected in series. The turbine expanders, according to their rated operating pressure, include at least a medium-pressure turbine and a high-pressure turbine. Each medium-pressure turbine and each high-pressure turbine corresponds to a make-up air valve, which is connected between the corresponding turbine expander and the air storage device via a branch pipeline. The valve control unit is electrically connected to each turbine expander, the air storage device, the regulating valve, and each make-up air valve. The method is applied to the valve control unit, and the method includes:

[0006] Acquire the operating status events of the turbine unit, and determine the flow control parameters of the turbine unit when the operating status events are triggered;

[0007] Based on the flow control parameters and valve flow distribution coefficients, determine the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each air supply valve;

[0008] Based on the valve flow characteristics of the control valve and the corresponding flow distribution output parameters of the control valve, determine the valve control output value of the control valve; and based on the valve flow characteristics of each air supply valve and the corresponding flow distribution output parameters of each air supply valve, determine the valve control output value of each air supply valve.

[0009] The valve opening of the regulating valve is controlled according to the valve control output value of the regulating valve; and the valve opening of the corresponding air supply valve is controlled according to the valve control output value of each air supply valve.

[0010] According to another aspect of the present invention, a control device for a turbine unit valve is provided, the device comprising:

[0011] The acquisition module is used to acquire the operating status events of the turbine unit and determine the flow control parameters of the turbine unit when the operating status events are triggered.

[0012] The first determining module is used to determine the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each air supply valve based on the flow control parameters and the valve flow distribution coefficient.

[0013] The second determining module is used to determine the valve control output value of the regulating valve based on the valve flow characteristic relationship of the regulating valve and the flow distribution output parameters corresponding to the regulating valve; and to determine the valve control output value of each air supply valve based on the valve flow characteristic relationship of each air supply valve and the flow distribution output parameters corresponding to each air supply valve.

[0014] The control module is used to control the valve opening of the regulating valve according to the valve control output value of the regulating valve; and to control the valve opening of the corresponding air supply valve according to the valve control output value of each air supply valve.

[0015] According to another aspect of the present invention, a valve control unit is provided, the valve control unit comprising:

[0016] At least one processor; and

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

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

[0019] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the turbine unit valve control method according to any embodiment of the present invention.

[0020] The turbine unit valve control method provided in this invention acquires the turbine unit's operating status events and determines the turbine unit's flow control parameters when the operating status event is triggered. Based on the flow control parameters and valve flow distribution coefficients, it determines the flow distribution output parameters corresponding to the regulating valve and each supplementary air valve. Based on the regulating valve's flow characteristic relationship and its corresponding flow distribution output parameters, it determines the regulating valve's valve control output value. Furthermore, based on the valve flow characteristic relationship and its corresponding flow distribution output parameters, it determines the supplementary air valve's valve control output value. It controls the regulating valve's valve opening according to the regulating valve's valve control output value and controls the corresponding supplementary air valve's valve opening according to its valve control output value. In this technical solution, on the one hand, determining the turbine unit's flow control parameters corresponding to the turbine unit's operating status events enables the determination of the flow control parameters that the turbine unit should satisfy under different operating status events, providing an important basis for subsequently determining how to control the operation of each valve. On the other hand, by determining the valve flow distribution coefficient for each valve and, based on the valve flow distribution coefficient and flow control parameters of each valve, determining the flow distribution output parameters corresponding to the regulating valve and the air supply valve, a reasonable allocation of the required managed flow to each valve is achieved, providing data support for subsequently determining the specific valve control output value for each valve. Finally, by using the valve flow characteristics of the regulating valve and its corresponding flow distribution output parameters, the valve control output value of the regulating valve is determined; and by using the valve flow characteristics of each air supply valve and its corresponding flow distribution output parameters, the valve control output value of each air supply valve is determined. This solves the problem that, in the current operation mode of turbine throttling and air supply, when encountering events such as turbine unit power over-limit events, the control device forces all regulating valves and air supply valves to close synchronously to the normal range, and after all valves are closed to the normal range, the valves remain stationary. This method enables individual control of the regulating valves and each air supply valve based on different operating status events during the operation of the turbine unit. This achieves automatic control of the turbine unit's workload and flow rate, thereby ensuring stable operation of the turbine unit and improving its operating efficiency.

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

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

[0023] Figure 1 A flowchart of a control method for a turbine unit valve provided in an embodiment of the present invention;

[0024] Figure 2 A schematic diagram illustrating the process structure of compressed air energy storage provided in this embodiment of the invention;

[0025] Figure 3 A flowchart illustrating another method for controlling turbine unit valves provided in an embodiment of the present invention;

[0026] Figure 4 Example diagram showing the flow distribution of the valve;

[0027] Figure 5 This is a schematic diagram of the structure of a control device for a turbine unit valve provided in an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the valve control unit provided in an embodiment of the present invention. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "medium-pressure section," "high-pressure section," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Figure 1 This is a flowchart illustrating a control method for turbine unit valves according to an embodiment of the present invention. This embodiment is applicable to situations where the opening degree of each valve is automatically controlled during the energy release stage of compressed air energy storage, thereby ensuring the stable operation of the turbine unit. This method can be executed by a control device for the turbine unit valves, which can be implemented in hardware and / or software and can be configured in a valve control unit. In this embodiment, the valve control unit can be an electronic device, such as a computer or controller.

[0032] Before introducing the control method for turbine unit valves provided by this invention, let's briefly introduce the compressed air energy storage system involved in this invention. Figure 2 This is an example diagram of the process structure for compressed air energy storage provided in an embodiment of the present invention. Figure 2 As shown, a compressed air energy storage system may include: a low-pressure expander 101, a medium-pressure expander 102, and a high-pressure expander 103 in a turbine unit, as well as a heat exchanger 20, a low-pressure main valve 301 corresponding to the low-pressure expander, a medium-pressure main valve 302 corresponding to the medium-pressure expander, a regulating valve (high-pressure regulating valve) 303 corresponding to the high-pressure expander, a main valve 40, an outlet shut-off valve 50, an air storage device 60, a heat storage tank 701, a cold storage tank 702, a second-stage air supply valve 801, and a first-stage air supply valve 802 (in an actual air energy storage system, there will be N stages of air supply valves; only the second-stage air supply valve is shown here).

[0033] During the energy release phase, the air energy storage system releases high-pressure gas from the storage device 60, which is then heated by the heat exchanger 20 and sent to the turbine unit to drive the generator to generate electricity. In actual operation, the intermediate main valve 302, the low-pressure main valve 301, and the main air valve 40 are fully open. Furthermore, the turbine power and valve status of the turbine expander unit are monitored in real time, and the valve openings are adjusted accordingly. However, when changes in the compressor air parameters cause the turbine power to exceed limits, the over-limit control will force all regulating valves and make-up air valves to close synchronously. Once the opening is closed to the normal range, the valves remain stationary, resulting in the regulating valve and make-up air valve opening simultaneously, which leads to a decrease in turbine efficiency.

[0034] Continue to refer to Figure 1 .like Figure 1 As shown, the method includes:

[0035] S101. Obtain the operating status event of the turbine unit, and determine the flow control parameters of the turbine unit when the operating status event is triggered.

[0036] Among them, the operational status events are different operational status events of the turbine unit during operation. For example, events before grid connection of the turbine unit, events after grid connection of the turbine unit, emergency tripping and shutdown events of the turbine unit, power over-limit events of the turbine unit, or events in which staff manually operate the turbine unit, etc.

[0037] Specifically, trigger conditions for operational status events are pre-set. After the turbine unit begins normal operation, the valve control unit monitors the operational status data of the turbine unit in real time and determines whether the current operating status of the turbine unit has triggered the pre-set trigger conditions for operational status events based on the operational status data. When the trigger conditions for an operational status event are triggered, the flow control parameters of the turbine unit corresponding to the operational status event are determined.

[0038] For example, during the operation of a turbine unit, one or more operating status events may be triggered. In this case, the operating status event with the highest priority can be selected as the target operating status event according to the pre-set priority order of the operating status events, and the flow control parameters of the turbine unit corresponding to the target operating status event can be determined.

[0039] In this embodiment, the flow control parameters corresponding to the turbine unit under the operating state event are determined based on the turbine unit's operating state event. This enables the determination of the flow control parameters that the turbine unit should meet under different operating state events, providing an important basis for determining how to control the operation of each valve.

[0040] S102. Based on the flow control parameters and valve flow distribution coefficients, determine the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each air supply valve.

[0041] The valve flow distribution coefficient is the flow percentage coefficient allocated to each valve.

[0042] Specifically, during the operation of the turbine unit, the flow distribution output parameters for the regulating valves between the high-pressure turbine and the gas storage device, and for the make-up gas valves corresponding to the intermediate-pressure turbine and the high-pressure turbine, can be determined based on the established flow control parameters and valve flow distribution coefficients. Since each valve has a different flow control capability during turbine unit operation due to its different position and function within the unit, it is necessary to pre-determine the flow distribution coefficient for each valve to reasonably determine the allocated flow distribution output parameters for each valve.

[0043] In this embodiment, a valve flow distribution coefficient is determined for each valve, and based on the valve flow distribution coefficient and flow control parameters of each valve, the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each air supply valve are determined. This achieves a reasonable allocation of the required flow to each valve, providing data support for determining the specific valve control output value of each valve in the future.

[0044] S103. Determine the valve control output value of the control valve based on the valve flow characteristic relationship and the corresponding flow distribution output parameters of the control valve.

[0045] The valve flow characteristic relationship refers to the relationship between the valve flow rate and the valve opening degree for each valve. In this embodiment, the valve flow characteristic relationship can be a functional relationship.

[0046] Specifically, the valve control output value of the regulating valve can be calculated according to the following formula:

[0047] VALVE OUT_303 =OP OUT_303 *F 303 (x CV );

[0048] Among them, VALVE OUT_303 This refers to the valve control output value of the regulating valve. OP OUT_303 Assign output parameters to the flow rate of the control valve. F 303 (x CV (x) represents the valve flow characteristic relationship of the control valve. CV "" represents the valve opening degree of the control valve. "303" represents the control valve.

[0049] S104. Control the valve opening degree of the regulating valve according to the valve control output value of the regulating valve.

[0050] Here, "opening degree" refers to the degree of opening or closing.

[0051] Specifically, after calculating the valve control output value of the regulating valve, the valve control unit can control the valve opening degree of the regulating valve according to the valve control output value.

[0052] S105. Based on the valve flow characteristics of each air supply valve and the flow distribution output parameters corresponding to each air supply valve, determine the valve control output value of each air supply valve.

[0053] Specifically, the valve control output value of each air replenishment valve can be calculated according to the following formula:

[0054] VALVE OUT_80N =OP OUT_80N *F 80N (x N );

[0055] Among them, VALVE OUT_80N This is the valve control output value for the air supply valve. OP OUT_80N Output parameters for flow distribution to the air supply valve. F 80N (x N (x) represents the valve flow characteristic relationship of the air supply valve. N "80" represents the valve opening of the Nth stage air supply valve. "80" represents the air supply valve, and "80N" represents the Nth stage air supply valve.

[0056] S106. Control the valve opening of the corresponding air supply valve according to the valve control output value of each air supply valve.

[0057] Specifically, after calculating the valve control output value of each air supply valve, the valve control unit can control the valve opening of the corresponding air supply valve according to the valve control output value of each air supply valve.

[0058] It is worth noting that S103-S104 and S105-S106 are parallel steps, which can be executed simultaneously or sequentially.

[0059] In this embodiment, the valve control output value of the regulating valve is determined by the valve flow characteristic relationship of the regulating valve and its corresponding flow distribution output parameter; similarly, the valve control output value of each air supply valve is determined by the valve flow characteristic relationship of each air supply valve and its corresponding flow distribution output parameter. This solves the problem that in the current turbine throttling and air supply operation mode, when encountering events such as turbine unit power over-limit events, the control device forces all regulating valves and air supply valves to close synchronously to the normal range, and after all valves are closed to the normal range, the valves remain stationary. This method enables individual control of the regulating valve and individual control of each air supply valve based on different operating state events during turbine unit operation, thereby achieving automatic control of turbine unit workload and flow, thus ensuring stable subsequent operation of the turbine unit and improving the turbine unit's operating efficiency.

[0060] The turbine unit valve control method provided in this invention acquires the turbine unit's operating status events and determines the turbine unit's flow control parameters when the operating status event is triggered. Based on the flow control parameters and valve flow distribution coefficients, it determines the flow distribution output parameters corresponding to the regulating valve and each supplementary air valve. Based on the regulating valve's flow characteristic relationship and its corresponding flow distribution output parameters, it determines the regulating valve's valve control output value. Furthermore, based on the valve flow characteristic relationship and its corresponding flow distribution output parameters, it determines the supplementary air valve's valve control output value. It controls the regulating valve's valve opening according to the regulating valve's valve control output value and controls the corresponding supplementary air valve's valve opening according to its valve control output value. In this technical solution, on the one hand, determining the turbine unit's flow control parameters corresponding to the turbine unit's operating status events enables the determination of the flow control parameters that the turbine unit should satisfy under different operating status events, providing an important basis for subsequently determining how to control the operation of each valve. On the other hand, by determining the valve flow distribution coefficient for each valve and, based on the valve flow distribution coefficient and flow control parameters of each valve, determining the flow distribution output parameters corresponding to the regulating valve and the air supply valve, a reasonable allocation of the required managed flow to each valve is achieved, providing data support for subsequently determining the specific valve control output value for each valve. Finally, by using the valve flow characteristics of the regulating valve and its corresponding flow distribution output parameters, the valve control output value of the regulating valve is determined; and by using the valve flow characteristics of each air supply valve and its corresponding flow distribution output parameters, the valve control output value of each air supply valve is determined. This solves the problem that, in the current operation mode of turbine throttling and air supply, when encountering events such as turbine unit power over-limit events, the control device forces all regulating valves and air supply valves to close synchronously to the normal range, and after all valves are closed to the normal range, the valves remain stationary. This method enables individual control of the regulating valves and each air supply valve based on different operating status events during the operation of the turbine unit. This achieves automatic control of the turbine unit's workload and flow rate, thereby ensuring stable operation of the turbine unit and improving its operating efficiency.

[0061] Figure 3This is a flowchart of another turbine unit valve control method provided by an embodiment of the present invention. Based on the above embodiments, this embodiment provides a detailed explanation of the steps: "determining the turbine unit's flow control parameters when a working operation event is triggered"; the steps preceding "determining the flow distribution output parameters corresponding to each air supply valve and the flow distribution output parameters corresponding to the regulating valve based on the flow control parameters and the valve flow distribution coefficient"; the steps preceding "determining the valve control output value of each air supply valve based on the valve flow characteristic relationship of each air supply valve and the flow distribution output parameters corresponding to each air supply valve". Figure 3 As shown, the method includes:

[0062] S301, Obtain the operating status event of the turbine unit.

[0063] Among them, the operational status events include pre-grid connection events of the turbine unit, post-grid connection events of the turbine unit, flow control events of the turbine unit, and abnormal operation events of the turbine unit.

[0064] Specifically, events that may occur during the operation of the turbine unit can be classified in advance into the four types of operating status events mentioned above.

[0065] For example, the pre-grid-connection flow control event of the turbine unit is considered a pre-grid-connection event. The power flow control event after grid connection is considered a post-grid-connection event. Events involving manual operation by personnel on the turbine unit, such as manually inputting flow adjustment parameters into a handheld device, are considered flow control events. Events such as the turbine unit's Emergency Trip System (ETS) shutdown, the turbine unit's Overspeed Protection Controller (OPC) activation, a primary frequency modulation event after grid connection, and a power over-limit event after grid connection are considered abnormal operating events of the turbine unit.

[0066] For example, after classifying the events that may occur during the operation of the turbine unit according to the above example, the operating status events of the turbine unit can be obtained and determined based on the operating status data of the turbine unit.

[0067] S302. If the operating status event is determined to be a pre-grid connection event of the turbine unit, then the speed control output parameters are determined based on the control speed parameters and target control speed parameters of the turbine unit.

[0068] Specifically, if the current operating status event of the turbine unit is determined to be a pre-grid-connection flow control event based on the real-time monitored operating status data, then the operating status event can be determined as a pre-grid-connection event for the turbine unit. Furthermore, the speed control output parameters are determined through incremental PID calculation based on the turbine unit's control speed parameters and target control speed parameters.

[0069] For example, the calculation method for the speed control output parameters is as follows:

[0070]

[0071] OP SIC_OUT (n) = OP SIC_OUT (n-1)+ΔU(n);

[0072] Among them, OP SIC_OUT (n) represents the output value of the PID controller for the current cycle, OP. SIC_OUT (n-1) represents the output value of the speed PID in the previous cycle, ΔU(n) represents the increment of the deviation effect in the current cycle, and X P T is the proportional gain of the incremental PID controller, e(n) is the PID control deviation for the current cycle, and e(n-1) is the PID control deviation for the previous cycle. I T is the integral time constant of the incremental PID controller. S This is the sampling period for the incremental PID controller.

[0073] S303. If the operating status event is determined to be a post-grid connection event of the turbine unit, then the power control output parameters are determined based on the control power parameters and target control power parameters of the turbine unit.

[0074] Specifically, if the current operating status event of the turbine unit is determined to be a flow control event for power after grid connection based on the real-time monitored operating status data, then the operating status event can be determined as a post-grid connection event for the turbine unit. Furthermore, the power control output parameters are determined through incremental PID calculation based on the turbine unit's control power parameters and target control power parameters.

[0075] For example, the calculation method for power control output parameters is as follows:

[0076]

[0077] OP PIC_OUT (n) = OP PIC_OUT (n-1)+ΔU(n);

[0078] Among them, OP PIC_OUT (n) represents the output value of the power PID in the current cycle, OP PIC_OUT(n-1) is the output value of the power PID in the previous cycle, ΔU(n) is the increment of the deviation effect in the current cycle, and X P T is the proportional gain of the incremental PID controller, e(n) is the PID control deviation for the current cycle, and e(n-1) is the PID control deviation for the previous cycle. I T is the integral time constant of the incremental PID controller. S This is the sampling period for the incremental PID controller.

[0079] S304. If the operating status event is determined to be a flow control event of the turbine unit, then obtain the pre-set target flow control parameters.

[0080] Specifically, if real-time monitoring detects manual operations performed by staff on the turbine unit, such as manually inputting flow rate adjustment parameters into a handheld device, then the operational status event can be identified as a flow control event for the turbine unit. In this case, the output value input by the staff can be directly acquired and used as the target flow control parameter.

[0081] S305. If the operating status event is determined to be an abnormal operation event of the turbine unit, then determine the flow protection output parameters of the turbine unit.

[0082] Specifically, the operating status data of the turbine unit is monitored in real time. If events such as turbine unit ETS shutdown, turbine unit OPC action, frequency modulation mode event after turbine unit grid connection, or power over-limit event after turbine unit grid connection are detected, the flow protection output parameters of the turbine unit can be determined according to different events.

[0083] For example, if a turbine unit ETS shutdown event is detected, the turbine unit's flow protection output parameter is 0. If a turbine unit OPC action event is detected, the turbine unit's flow protection output parameter is 0.

[0084] If a frequency modulation event is detected after the turbine unit is connected to the grid, the flow protection output parameters of the turbine unit are determined based on the detected frequency or speed deviation, for example:

[0085] x = SIC PV -SIC LIM ;

[0086] ΔFPM=x*F1(x)*K1;

[0087] OP PRO_OUT (n) = OP OUT (n-1)+ΔFPM;

[0088] Among them, SIC PV To monitor the rotational speed, SIC LIMK1 is the speed limit value after the turbine is connected to the grid, F1(x) is the first gain coefficient, F1(x) is the first proportional correction coefficient, ΔFPM is the deviation value of the primary frequency regulation control, and OP is the speed limit value after the turbine is connected to the grid. OUT (n-1) represents the flow control parameters for the previous cycle.

[0089] If a power over-limit event is detected after the turbine unit is connected to the grid, the flow protection output parameters can be determined according to the following formula:

[0090] x = POWER PV -POWER LIM ;

[0091] ΔPRO=x*F2(x)*K2;

[0092] OP PRO_OUT (n) = OP OUT (n-1)+ΔPRO;

[0093] Among them, POWER PV POWER is the actual value of the generated power. LIM K2 is the limit value for power generation, F2(x) is the second gain coefficient, F2(x) is the second proportional correction coefficient, ΔPRO is the deviation value of power over-limit control, and OP is the power generation limit value. OUT These are the flow control parameters from the previous cycle.

[0094] It is worth noting that the x in the above "frequency modulation mode event after the turbine unit is connected to the grid" and "power over-limit event after the turbine unit is connected to the grid" are the x corresponding to the turbine unit when the corresponding event occurs, and are not the same x.

[0095] It is worth noting that S302, S303, S304, and S305 are parallel steps. In this embodiment, the working operation status event is at least one of S302, S303, S304, and S305.

[0096] S306. Determine the speed control output parameters, power control output parameters, target flow control parameters, or flow protection output parameters as the flow control parameters of the turbine unit.

[0097] Specifically, since one or more events may occur simultaneously during the operation of the turbine unit, it is necessary to determine the parameter corresponding to one event as the target operating state event based on the priority of each event, and then determine the parameter corresponding to the target operating state event as the flow control parameter of the turbine unit. The specific steps are as follows:

[0098] (1) Obtain the priority order of pre-set work running status events.

[0099] Specifically, the priority order of each operational status event is preset. In this embodiment, the priority order of turbine unit pre-grid connection events, turbine unit post-grid connection events, turbine unit flow control events, and turbine unit operational anomaly events is arranged in ascending order. That is, turbine unit operational anomaly events are the first priority events, and turbine unit pre-grid connection events are the fourth priority events.

[0100] (2) According to the priority order, the highest priority working status event is taken as the target working status event, and the parameters corresponding to the target working status event are determined as the flow control parameters of the turbine unit.

[0101] Specifically, when it is determined that there are multiple operating status events of the turbine unit, the highest priority operating status event is selected as the target operating status event, and the parameters corresponding to the target operating status event are determined as the flow control parameters of the turbine unit.

[0102] In this embodiment, the parameters corresponding to the current operating state event are determined based on the different operating state events of the turbine unit, thus realizing the determination of the most suitable parameters for the turbine unit in different operating state events. Furthermore, based on the priority order of the turbine unit's operating state events, the operating state event with the highest priority is determined as the target operating state event, and its corresponding parameters are determined as the flow control parameters of the turbine unit, thus achieving accurate determination of the turbine flow rate.

[0103] S307. Determine the total number of valves based on the number of all air supply valves and the number of regulating valves. Specifically, the total number of valves can be determined using the following formula:

[0104] T = n + 1;

[0105] There is typically one regulating valve. The number of air supply valves is n. T represents the total number of valves.

[0106] S308. Determine the valve flow distribution coefficient based on the total number of valves.

[0107] Specifically, since each valve has a different position and function within the turbine unit, its flow control capability during turbine unit operation also varies. Therefore, it is necessary to pre-determine the flow distribution coefficient for each valve to reasonably determine the flow distribution output parameters allocated to each valve. In this embodiment, the flow distribution coefficient for the air supply valve is 1 / T*100, and the flow distribution coefficient for the regulating valve is 1.

[0108] S309. Determine the flow distribution output parameters of the control valve based on the valve flow distribution coefficient and flow control parameters.

[0109] Specifically, after determining the valve flow distribution coefficient of the control valve, the corresponding flow distribution output parameters of the control valve can be determined based on the valve flow distribution coefficient and the flow control parameters.

[0110] For example, the flow distribution output parameters corresponding to the control valve can be calculated according to the following formula:

[0111] OP OUT_CV (n) = T*OP OUT (n);

[0112] Among them, OP OUT_CV (n) represents the flow distribution output parameter corresponding to the control valve in the current cycle. OP OUT (n) represents the flow control parameters of the turbine unit.

[0113] In this embodiment, the flow rate allocated to the regulating valve is determined based on the number of all adjustable valves and the calculated flow control parameters. This ensures that when adjusting other air supply valves affects the operation of the entire turbine unit, the flow rate can be further adjusted through the regulating valve, thus ensuring the stable operation of the turbine unit.

[0114] S310. Obtain the valve opening parameters and valve flow parameters of the control valve.

[0115] Among them, the valve opening parameter refers to the maximum and minimum opening and closing dimensions of the valve. The valve flow parameter refers to the flow rate of the valve at different opening degrees.

[0116] Specifically, the valve opening parameters can be determined in advance for the control valve, and experiments or tests can be conducted to determine the valve flow parameters under different valve openings.

[0117] S311. Determine the valve flow characteristic relationship of the control valve based on the valve opening parameter and valve flow parameter.

[0118] Specifically, after obtaining the valve opening parameter and valve flow parameter of the control valve, the correspondence between the valve opening parameter and valve flow parameter can be determined based on these parameters. For example, using the valve opening parameter as the independent variable and the valve flow parameter as the dependent variable, the expression for the valve flow characteristic relationship of the control valve can be determined.

[0119] S312. Determine the valve control output value of the control valve based on the valve flow characteristic relationship and the corresponding flow distribution output parameters of the control valve.

[0120] Specifically, the valve control output value of the regulating valve can be calculated according to the following formula:

[0121] VALVE OUT_CV (n) = OP OUT_CV (n)*F CV (x cv );

[0122] Among them, VALVE OUT_CV (n) represents the valve control output value of the regulating valve in the current cycle. F CV (x CV (x) represents the valve flow characteristic relationship of the control valve. CV This refers to the valve opening parameter of the control valve.

[0123] S313. Control the valve opening degree of the regulating valve according to the valve control output value of the regulating valve.

[0124] The regulating valve is controlled by at least one of electro-hydraulic operation, hydraulic operation, and electric operation, so that the regulating valve opens according to the corresponding valve control output value.

[0125] Specifically, after determining the valve control output value of the regulating valve, the valve opening can be controlled according to the valve control output value.

[0126] For example, after determining the valve control output value of the regulating valve and the valve control output value of each air supply valve through the above steps, the valve control output values ​​of the regulating valve and each air supply valve can be processed by a servo card using proportional-integral calculation to output a standard electrical signal command. The electrical signal is then converted into a hydraulic signal by an electro-hydraulic converter, which in turn drives the throttle actuator, thereby opening the regulating valve via a lever.

[0127] S314. Determine the number of air supply sections corresponding to each air supply valve, and determine the flow distribution output parameters corresponding to each air supply valve based on the number of air supply sections, the valve flow distribution coefficient and flow control parameters of the air supply valve.

[0128] The number of air replenishment sections refers to the number of sections of the air replenishment valve. For example, the number of air replenishment sections for the Nth air replenishment valve is N.

[0129] Specifically, the flow distribution output parameters corresponding to each air supply valve can be calculated according to the following formula:

[0130]

[0131] Among them, OP OUT_N (n) represents the flow distribution output parameter corresponding to the Nth segment of the air supply valve in the current cycle. OP OUT(n) represents the flow control parameters of the turbine unit.

[0132] In this embodiment, based on the valves in different sections and the calculated flow control parameters of the turbine unit, the flow distribution output parameters corresponding to the valves in different sections are determined, thus achieving preliminary flow distribution for the valves in different sections. Simultaneously, it also achieves the reasonable allocation of different flow rates to the valves in different sections, ensuring stable operation of the turbine unit while maintaining a constant overall flow rate.

[0133] S315. Obtain the valve opening parameters and valve flow parameters for each air supply valve.

[0134] Specifically, the valve opening parameters can be determined in advance for each air supply valve, and experiments or tests can be conducted to determine the valve flow parameters under different valve openings.

[0135] S316. Based on the valve opening parameters and valve flow parameters of each air supply valve, determine the valve flow characteristic relationship of each air supply valve.

[0136] Specifically, after obtaining the valve opening parameter and valve flow parameter of each air supply valve, the correspondence between the valve opening parameter and valve flow parameter of each air supply valve can be determined based on these parameters. For example, using the valve opening parameter of the air supply valve as the independent variable and the valve flow parameter as the dependent variable, the valve flow characteristic relationship expression of each air supply valve can be determined.

[0137] S317. Based on the valve flow characteristics of each air supply valve and the flow distribution output parameters corresponding to each air supply valve, determine the valve control output value of each air supply valve.

[0138] Specifically, the valve control output value of each air replenishment valve can be calculated according to the following formula:

[0139] VALVE OUT _ N (n) = OP OUT _ N (n)*F N (x N );

[0140] Among them, VALVE OUT _ N (n) represents the valve control output value of the Nth air supply valve in the current cycle. F N (x N Let x represent the valve flow characteristic relationship of the Nth segment air supply valve. N The valve opening parameter for the Nth segment air supply valve.

[0141] S318. Control the valve opening of the corresponding air supply valve according to the valve control output value of each air supply valve.

[0142] Each air replenishment valve is controlled by at least one of electro-hydraulic operation, hydraulic operation, and electric operation, so that each air replenishment valve opens according to the corresponding valve control output value.

[0143] Specifically, after determining the valve control output value of each air supply valve, the valve opening of the corresponding air supply valve can be controlled according to the valve control output value.

[0144] It is worth noting that S309-S313 and S314-S318 in this embodiment are parallel steps, which can be executed simultaneously or sequentially.

[0145] Furthermore, the flow distribution between the regulating valve and the replenishing valve described above can be as follows: Figure 4 As shown. Figure 4 This diagram illustrates the flow distribution of valves. Specifically, the horizontal axis represents the flow distribution, and the vertical axis represents the valve flow rate. The flow distribution for the regulating valve ranges from 0 to 1 / T*100. The flow distribution for the first-stage air supply valve ranges from 1 / T*100 to 2 / T*100. The flow distribution for the second-stage air supply valve ranges from 2 / T*100 to N / T*100. The flow distribution for the Nth-stage air supply valve ranges from N / T*100 to 100%. Through the above method, the following can ultimately be achieved: Figure 4 The diagram shows the valve flow rate after flow distribution to each valve. Furthermore, the method described above allows for segmented flow control of each valve.

[0146] Figure 5 This is a schematic diagram of a control device for a turbine unit valve provided in an embodiment of the present invention. Figure 5 As shown, the compressed air energy storage system includes a turbine unit, an air storage device, a regulating valve, a make-up air valve, and a valve control unit. The turbine unit and the air storage device are connected via a main pipeline, and the regulating valve is located between the turbine unit and the air storage device. The turbine unit includes at least three turbine expanders connected in series. The turbine expanders, according to their rated operating pressure, include at least a medium-pressure turbine and a high-pressure turbine. Each medium-pressure turbine and each high-pressure turbine corresponds to a make-up air valve, which is connected to the corresponding turbine expander and the air storage device via a branch pipeline. The valve control unit is electrically connected to each turbine expander, the air storage device, the regulating valve, and each make-up air valve. This device includes:

[0147] The acquisition module 501 is used to acquire the operating status event of the turbine unit and determine the flow control parameters of the turbine unit when the operating status event is triggered.

[0148] The first determining module 502 is used to determine the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each air supply valve based on the flow control parameters and the valve flow distribution coefficient.

[0149] The second determining module 503 is used to determine the valve control output value of the regulating valve based on the valve flow characteristic relationship of the regulating valve and the flow distribution output parameters corresponding to the regulating valve; and to determine the valve control output value of each air supply valve based on the valve flow characteristic relationship of each air supply valve and the flow distribution output parameters corresponding to each air supply valve.

[0150] The control module 504 is used to control the valve opening of the control valve according to the valve control output value of the control valve; and to control the valve opening of the corresponding air supply valve according to the valve control output value of each air supply valve.

[0151] Optionally, the operating status events include pre-grid-connection events of the turbine unit, post-grid-connection events of the turbine unit, flow control events of the turbine unit, and abnormal operation events of the turbine unit; the flow control parameters of the turbine unit are determined when an operating status event is triggered; the acquisition module 501 is specifically used for:

[0152] If the operating status event is determined to be a pre-grid-connection event for the turbine unit, then the speed control output parameters are determined based on the turbine unit's control speed parameters and target control speed parameters. If the operating status event is determined to be a post-grid-connection event for the turbine unit, then the power control output parameters are determined based on the turbine unit's control power parameters and target control power parameters. If the operating status event is determined to be a flow control event for the turbine unit, then the pre-set target flow control parameters are obtained. If the operating status event is determined to be an abnormal operation event for the turbine unit, then the flow protection output parameters for the turbine unit are determined. The speed control output parameters, power control output parameters, target flow control parameters, or flow protection output parameters are then used as the turbine unit's flow control parameters.

[0153] Optionally, the speed control output parameters, power control output parameters, target flow control parameters, or flow protection output parameters are determined as the flow control parameters of the turbine unit. The acquisition module 501 is specifically used for:

[0154] Obtain the priority order of pre-set operating status events; based on the priority order, select the operating status event with the highest priority as the target operating status event, and determine the parameters corresponding to the target operating status event as the flow control parameters of the turbine unit.

[0155] Optionally, before determining the flow distribution output parameters corresponding to each air supply valve and the flow distribution output parameters corresponding to the regulating valve based on the flow control parameters and the valve flow distribution coefficient, the first determining module 502 is also used for:

[0156] Determine the total number of valves based on the number of all air supply valves and the number of regulating valves; determine the valve flow distribution coefficient based on the total number of valves.

[0157] Optionally, the first determining module 502 is specifically used for:

[0158] Based on the valve flow distribution coefficient and flow control parameters of the regulating valve, determine the flow distribution output parameters corresponding to the regulating valve; and determine the number of air supply sections corresponding to each air supply valve, and determine the flow distribution output parameters corresponding to each air supply valve based on the number of air supply sections, the valve flow distribution coefficient and flow control parameters of the air supply valve.

[0159] Optionally, before determining the valve control output value of each air supply valve based on the valve flow characteristics of each air supply valve and the flow distribution output parameters corresponding to each air supply valve, the second determining module 503 is further configured to:

[0160] Obtain the valve opening parameters and valve flow parameters of each air supply valve, and obtain the valve opening parameters and valve flow parameters of the control valve; determine the valve flow characteristic relationship of the control valve based on the valve opening parameters and valve flow parameters of the control valve; and determine the valve flow characteristic relationship of each air supply valve based on the valve opening parameters and valve flow parameters of each air supply valve.

[0161] The control device for turbine unit valves provided in the embodiments of the present invention can execute the control method for turbine unit valves provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the method.

[0162] Figure 6 This is a schematic diagram of the structure of a valve control unit 6 provided in an embodiment of the present invention. The valve control 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, 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 processors, cellular phones, smartphones, 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 illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0163] like Figure 6As shown, the valve control unit 6 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from the storage unit 18. The RAM 13 can also store various programs and data required for the operation of the valve control unit 6. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0164] Multiple components in the valve control unit 6 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the valve control unit 6 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0165] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the control methods for turbine unit valves.

[0166] In some embodiments, the turbine unit valve control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the valve control unit 6 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the turbine unit valve control method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the turbine unit valve control method by any other suitable means (e.g., by means of firmware).

[0167] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0168] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0169] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0170] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0171] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0172] A computing system can include clients and servers. Clients and servers are generally geographically separated and typically interact via communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0173] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0174] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for controlling valves in a turbine unit, characterized in that, The compressed air energy storage system includes a turbine unit, an air storage device, a regulating valve, a make-up air valve, and a valve control unit. The turbine unit and the air storage device are connected via a main pipeline, and the regulating valve is located between the turbine unit and the air storage device. The turbine unit includes at least three turbine expanders connected in series. The turbine expanders, according to their rated operating pressure, include at least a medium-pressure turbine and a high-pressure turbine. Each medium-pressure turbine and each high-pressure turbine corresponds to one make-up air valve, and the make-up air valve is connected between the corresponding turbine expander and the air storage device via a branch pipeline. The valve control unit is electrically connected to each turbine expander, the air storage device, the regulating valve, and each make-up air valve. The method is applied to a valve control unit, and the method includes: Acquire the operating status event of the turbine unit, and determine the flow control parameters of the turbine unit when the operating status event is triggered; Based on the flow control parameters and valve flow distribution coefficients, determine the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each of the air supply valves; Based on the valve flow characteristics of the regulating valve and the flow distribution output parameters corresponding to the regulating valve, the valve control output value of the regulating valve is determined; and based on the valve flow characteristics of each of the air supply valves and the flow distribution output parameters corresponding to each of the air supply valves, the valve control output value of each air supply valve is determined. The valve opening of the regulating valve is controlled according to the valve control output value of the regulating valve; and the valve opening of the corresponding air supply valve is controlled according to the valve control output value of each of the air supply valves.

2. The control method for turbine unit valves according to claim 1, characterized in that, The operational status events include pre-grid connection events of the turbine unit, post-grid connection events of the turbine unit, flow control events of the turbine unit, and abnormal operation events of the turbine unit; Determining the flow control parameters of the turbine unit when the operating status event is triggered includes: If the operating status event is determined to be a pre-grid connection event of the turbine unit, then the speed control output parameters are determined based on the control speed parameters and target control speed parameters of the turbine unit. If the operating status event is determined to be a grid-connected event of the turbine unit, then the power control output parameters are determined based on the control power parameters and target control power parameters of the turbine unit. If the operating status event is determined to be the flow control event of the turbine unit, then the pre-set target flow control parameters are obtained; If the operating status event is determined to be an abnormal operating event of the turbine unit, then the flow protection output parameters of the turbine unit are determined. The speed control output parameter, the power control output parameter, the target flow control parameter, or the flow protection output parameter are determined as the flow control parameters of the turbine unit.

3. The control method for turbine unit valves according to claim 2, characterized in that, The step of determining the speed control output parameter, the power control output parameter, the target flow control parameter, or the flow protection output parameter as the flow control parameter of the turbine unit includes: Obtain the pre-set priority order of the work operation status events; According to the priority order, the highest priority operating status event is taken as the target operating status event, and the parameters corresponding to the target operating status event are determined as the flow control parameters of the turbine unit.

4. The control method for turbine unit valves according to claim 1, characterized in that, Before determining the flow distribution output parameters corresponding to each of the air supply valves and the flow distribution output parameters corresponding to the regulating valves based on the flow control parameters and valve flow distribution coefficients, the process further includes: The total number of valves is determined based on the number of all the aforementioned air supply valves and the number of the aforementioned regulating valves; The valve flow distribution coefficient is determined based on the total number of valves.

5. The control method for turbine unit valves according to claim 4, characterized in that, The step of determining the flow distribution output parameters corresponding to each of the air supply valves and the flow distribution output parameters corresponding to the regulating valves based on the flow control parameters and the valve flow distribution coefficients includes: Based on the valve flow distribution coefficient of the regulating valve and the flow control parameters, determine the flow distribution output parameters corresponding to the regulating valve; and, Determine the number of air supply segments corresponding to each of the air supply valves, and determine the flow distribution output parameters corresponding to each of the air supply valves based on the number of air supply segments, the valve flow distribution coefficient of the air supply valve, and the flow control parameters.

6. The control method for turbine unit valves according to claim 1, characterized in that, Before determining the valve control output value of each air replenishment valve based on the valve flow characteristic relationship of each air replenishment valve and the flow distribution output parameters corresponding to each air replenishment valve, the method further includes: Obtain the valve opening parameter and valve flow parameter of each of the air replenishment valves, and obtain the valve opening parameter and valve flow parameter of the regulating valve; Based on the valve opening parameter and valve flow parameter of the control valve, determine the valve flow characteristic relationship of the control valve; and, Based on the valve opening parameter and valve flow parameter of each of the aforementioned air replenishment valves, the valve flow characteristic relationship of each of the aforementioned air replenishment valves is determined.

7. The control method for turbine unit valves according to claim 1, characterized in that, Each of the air replenishment valves and the regulating valves is controlled by at least one of electro-hydraulic operation, hydraulic operation, and electric operation, so that each of the air replenishment valves and the regulating valves opens according to the corresponding valve control output value.

8. A control device for a turbine unit valve, characterized in that, The compressed air energy storage system includes a turbine unit, an air storage device, a regulating valve, a make-up air valve, and a valve control unit. The turbine unit and the air storage device are connected via a main pipeline, and the regulating valve is located between the turbine unit and the air storage device. The turbine unit includes at least three turbine expanders connected in series. Each turbine expander, according to its rated operating pressure, includes at least a medium-pressure turbine and a high-pressure turbine. Each medium-pressure turbine and each high-pressure turbine corresponds to one make-up air valve, and the make-up air valve is connected between the corresponding turbine expander and the air storage device via a branch pipeline. The valve control unit is electrically connected to each turbine expander, the air storage device, the regulating valve, and each make-up air valve. The device includes: The acquisition module is used to acquire the operating status event of the turbine unit and determine the flow control parameters of the turbine unit when the operating status event is triggered. The first determining module is used to determine the flow distribution output parameters corresponding to the regulating valve and the flow distribution output parameters corresponding to each of the air supply valves based on the flow control parameters and the valve flow distribution coefficient. The second determining module is used to determine the valve control output value of the regulating valve based on the valve flow characteristic relationship of the regulating valve and the flow distribution output parameter corresponding to the regulating valve; and to determine the valve control output value of each air supply valve based on the valve flow characteristic relationship of each air supply valve and the flow distribution output parameter corresponding to each air supply valve. The control module is used to control the valve opening of the regulating valve according to the valve control output value of the regulating valve; and to control the valve opening of the corresponding air supply valve according to the valve control output value of each of the air supply valves.

9. A valve control unit, characterized in that, include: One or more processors; Memory, used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the control method for turbine unit valves as described in 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 the processor, it implements the control method for turbine unit valves as described in any one of claims 1 to 7.

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