Valve position adaptive control method and system applied to energy storage generator set

Abstract

The invention discloses a valve position adaptation control method and system applied to an energy storage generator set. The system comprises a first function module and a first addition module. The main steam pressure is sequentially connected to the first function module, the first addition module and the initial load. According to the calculation mode of the initial load, main steam pressure is sequentially connected to a first function module, a first addition module and the initial load, and finally a numerical value is obtained after judgment; according to the calculation mode of the given valve position, the output end of the sixth switching module and the valve position high limit are both connected to the small selection value module, the output end of the small selection value module and the valve position low limit are both connected to the large selection value module, the output end of the large selection value module is connected to the given valve position, and finally a numerical value is obtained after judgment. The aim of flexibly controlling the valve position of the energy storage generator set is achieved.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent control of generator sets, and in particular relates to a valve position adaptation control method and system applied to energy storage generator sets. Background Art

[0002] The valve position adaptive control method for energy storage generator sets is an important technology related to the stability, efficiency, and safety of power systems. In energy storage systems, valve position control is a key means of regulating the flow of energy storage media. By precisely controlling the valve opening, the flow and pressure of the energy storage medium can be adjusted, thereby affecting the output power and operating status of the generator set. Currently, there is a lack of a valve position adaptive control method and system for energy storage generator sets that can meet the actual application scenarios and requirements of valve position adaptive control of energy storage generator sets and ensure that key indicators such as stability, response speed, accuracy, and economy of the control system are considered. Summary of the Invention

[0003] The purpose of the present invention is to provide a valve position adaptive control method and system for energy storage generator sets. The adaptive control strategy based on energy storage coordination can better coordinate valve position inertia and adaptively adjust system frequency, and has the functions of stabilizing power and suppressing fluctuations, thereby improving the transient performance of energy storage generator sets.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A valve position adaptation control system applied to an energy storage generator set includes a first function module and a first addition module; The main steam pressure is sequentially connected to the first function module, the first addition module and the initial load.

[0005] A further improvement of the present invention is that it further comprises a first division module, a second addition module, a first switching module, a first subtraction module, a first comparison minimum and minimum module, a first OR module and a large value module; The valve position change rate is connected to the first division module, and the output end of the first division module and the given valve position are connected to the second addition module; the given valve position and the target valve position are both connected to the first subtraction module, and the output end of the first subtraction module is connected to the first comparative minimum AND module, and the output end of the first comparative minimum AND module and the load lower limit action are both connected to the first OR module; the output end of the second addition module, the output end of the large selection module, and the output end of the first OR module are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the first switching module.

[0006] A further improvement of the present invention is that it further comprises a first comparison module, a second OR module, a second subtraction module, a third OR module and a second switching module; The valve position change rate is connected to the first division module, the given valve position and the output end of the first division module are connected to the second subtraction module, the given valve position and the target valve position are connected to the first comparison greater than module, the load high limit action, RB action, and main steam pressure limit action are all connected to the third OR module, and the output end of the third OR module and the output end of the first comparison greater than module are connected to the second OR module; the output end of the second subtraction module, the output end of the first switching module, and the output end of the second OR module are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the second switching module.

[0007] A further improvement of the present invention is that it further comprises a fourth or module and a third switching module; The load low limit action, the output end of the third or module, are all connected to the fourth or module; the output end of the second switching module, the output end of the large value module, and the output end of the fourth or module are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the third switching module.

[0008] A further improvement of the present invention is that it further comprises a third adding module and a fourth switching module; The output end of the third adding module, the output end of the fourth switching module, and the newly connected grid are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the third switching module.

[0009] A further improvement of the present invention is that it further comprises a third subtraction module and a fifth switching module; The total setting of the throttle valve and the frequency modulation valve position value are connected to the third subtraction module. The output end of the fourth switching module, the output end of the third subtraction module, and the valve position control are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the fifth switching module.

[0010] A further improvement of the present invention is that it further includes a first greater than or equal to module, a first and module and a sixth switching module; The total setting of the regulating valve is connected to the first greater than or equal to module, and the output end of the first greater than or equal to module and the load lower limit action are both connected to the first AND module; the output end of the large selection module, the output end of the fifth switching module, and the output end of the first AND module are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the sixth switching module.

[0011] A further improvement of the present invention is that it further comprises a small value selection module; The output end and the valve position upper limit of the sixth switching module are both connected to the small value selection module, and the output end and the valve position lower limit of the small value selection module are both connected to the large value selection module.

[0012] A further improvement of the present invention is that the output end of the large value module is connected to a given valve position.

[0013] A valve position adaptive control method applied to an energy storage generator set, based on the valve position adaptive control system applied to the energy storage generator set, comprises: The calculation method of the initial load: the main steam pressure is connected to the first function module, the first addition module and the initial load in sequence, and the value is finally obtained after judgment; the calculation method of the given valve position: the output end of the sixth switching module and the valve position upper limit are connected to the small selection module, the output end of the small selection module and the valve position lower limit are connected to the large selection module, and the output end of the large selection module is connected to the given valve position, and the value is finally obtained after judgment.

[0014] Compared with the prior art, the present invention has at least the following beneficial technical effects: The valve position adaptive control system for energy storage generator sets, provided by this invention, employs an adaptive valve opening control method. By adjusting the proportional coefficient, integral time, and differential time, it achieves precise control of the generator set's output. The proportional action of the PID controller enables rapid unit response, and appropriate parameters can be selected to adjust the system based on actual site needs.

[0015] The valve position adaptation control method applied to the energy storage generator set provided by the present invention forms a clear calculation process by sequentially connecting the main steam pressure, the first function module, the first addition module and other links in the calculation method of the initial load. This structured design helps to ensure the accuracy and consistency of the initial load calculation, so that the system can quickly and accurately adjust the initial load according to the change of the main steam pressure, thereby optimizing the operating state of the energy storage generator set. The calculation method of the given valve position realizes the effective restriction of the upper and lower limits of the valve position through the combined use of the small value selection module and the large value selection module. This design can ensure that the given valve position always fluctuates within a safe and reasonable range, avoiding system failure or performance degradation caused by the valve position exceeding the limit. In the calculation process of the given valve position, through the layer-by-layer screening of the small value selection module and the large value selection module, the system can automatically identify and eliminate the valve position value that exceeds the safety range, thereby ensuring the safe operation of the energy storage generator set. This safety mechanism is of great significance for preventing equipment damage and reducing accident risks. The present invention adopts an energy storage generator set output control strategy and capacity optimization configuration, which is of great significance for assisting the primary frequency regulation of today's large-scale thermal power generating units. This method takes into account the real-time status and capacity configuration of the unit, and can adjust the output of the energy storage according to the real-time status of the unit to meet the peak and frequency regulation needs of the power grid.

[0016] In summary, the valve position adaptive control method and system for an energy storage generator set described in the present invention depends on the actual application scenario and requirements. In actual applications, it comprehensively considers factors such as the stability, response speed, accuracy, and economy of the control system, thereby achieving the goal of flexible valve position control of the energy storage generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 The schematic diagram of the valve position adaptation control system applied to the energy storage generator set.

[0019] Figure 2 This is a rendering of an embodiment of the present invention.

[0020] In the attached figure: 001, main steam pressure, 002, valve position change rate, 003, given valve position, 004, target valve position, 005, load low limit action, 006, load high limit action, 007, RB action, 008, main steam pressure limit action, 009, proceed, 010, just connected to the grid, 011, total setting of the throttle valve, 012, frequency modulation valve position value, 013, valve position control, 014, load low limit action, 015, valve position high limit, 016, valve position low limit, 017, first function module, 018, first addition module, 019, first division module, 020, second addition module, 021, first switching module, 022, third addition module Module, 023, first subtraction module, 024, first comparison smaller and module, 025, first comparison greater than module, 026, first or module, 027, second or module, 028, second subtraction module, 029, third or module, 030, fourth or module, 031, third subtraction module, 032, first greater than or equal to module, 033, first and module, 034, second switching module, 035, third switching module, 036, fourth switching module, 037, fifth switching module, 038, sixth switching module, 039, small selection module, 040, large selection module, 041, initial load, 042, given valve position. DETAILED DESCRIPTION

[0021] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are to be considered as illustrative in nature and not restrictive.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0024] In the present invention, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] It should also be understood that the terms used in the present specification are only for the purpose of describing particular embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0028] The accompanying drawings illustrate various schematic diagrams of structures according to embodiments disclosed herein. These figures are not drawn to scale; for clarity, some details are exaggerated and some details may be omitted. The shapes of the various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art may design regions / layers with different shapes, sizes, and relative positions as needed.

[0029] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0030] Example 1 like Figure 1 As shown, the valve position adaptive control system for energy storage generator sets provided by the present invention includes: main steam pressure 001, valve position change rate 002, given valve position 003, target valve position 004, load low limit action 005, load high limit action 006, RB action 007, main steam pressure limit action 008, proceed 009, just connected to the grid 010, total setting of the regulating valve 011, frequency modulation valve position value 012, valve position control 013, load low limit action 014, valve high limit 015, valve low limit 016, first function module 017, first addition module 018, first division module 019, second addition module 020, first cut Switching module 021, third addition module 022, first subtraction module 023, first comparison smaller and module 024, first comparison greater than module 025, first OR module 026, second OR module 027, second subtraction module 028, third OR module 029, fourth OR module 030, third subtraction module 031, first greater than or equal to module 032, first and module 033, second switching module 034, third switching module 035, fourth switching module 036, fifth switching module 037, sixth switching module 038, small value selection module 039, large value selection module 040, initial load 041, given valve position 042.

[0031] Figure 1 The control strategy logic diagram includes the following parts: The initial load 041 includes: the main steam pressure 001 is sequentially connected to the first function module 017, the first addition module 018 and the initial load 041; Given valve position 042 includes: (1) Connection method of the first switching module 021: the valve position change rate 002 is connected to the first division module 019, the output end of the first division module 019 and the given valve position 003 are both connected to the second addition module 020; the given valve position 003 and the target valve position 004 are both connected to the first subtraction module 023, the output end of the first subtraction module 023 is connected to the first comparison module 024, the output end of the first comparison module 024 and the load lower limit action 005 are both connected to the first OR module 026; the output end of the second addition module 020, the output end of the large selection module 040, and the output end of the first OR module 026 are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the first switching module 021.

[0032] (2) Connection method of the second switching module 034: the valve position change rate 002 is connected to the first division module 019, the given valve position 003 and the output end of the first division module 019 are connected to the second subtraction module 028, the given valve position 003 and the target valve position 004 are connected to the first comparison greater than module 025, the load high limit action 006, the RB action 007, and the main steam pressure limit action 008 are connected to the third OR module 029, and the output end of the third OR module 029 and the output end of the first comparison greater than module 025 are connected to the second OR module 027; the output end of the second subtraction module 028, the output end of the first switching module 021, and the output end of the second OR module 027 are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the second switching module 034.

[0033] (3) Connection method of the third switching module 035: the load low limit action 005, the output end of the third OR module 029, and the proceed 009 are all connected to the fourth OR module 030; the output end of the second switching module 034, the output end of the large selection module 040, and the output end of the fourth OR module 030 are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the third switching module 035.

[0034] (4) Connection method of the fourth switching module 036: The output end of the third adding module 022, the output end of the fourth switching module 036, and the grid-connected terminal 010 are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the third switching module 035.

[0035] (5) Connection method of the fifth switching module 037: The total setting of the regulating valve 011 and the frequency modulation valve position value 012 are both connected to the third subtraction module 031, and the output end of the fourth switching module 036, the output end of the third subtraction module 031, and the valve position control 013 are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the fifth switching module 037.

[0036] (6) Connection method of the sixth switching module 038: the total setting of the regulating valve 011 is connected to the first greater than or equal to module 032, the output end of the first greater than or equal to module 032 and the load lower limit action 014 are both connected to the first AND module 033; the output end of the large selection module 040, the output end of the fifth switching module 037, and the output end of the first AND module 033 are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the sixth switching module 038.

[0037] (7) Connection method of the given valve position 042: the output end of the sixth switching module 038 and the valve position upper limit 015 are both connected to the small value selection module 039, the output end of the small value selection module 039 and the valve position lower limit 016 are both connected to the large value selection module 040, and the output end of the large value selection module 040 is connected to the given valve position 042.

[0038] The present invention is applicable to the following scenarios: (1) Energy storage is configured at the output bus of the synchronous generator set, and flexible control is performed through feedback of energy storage operation data. It cooperates with the synchronous generator set to output power and form a new power generation unit.

[0039] (2) A three-level virtual synchronous generator model was designed to use active support control to assist thermal power units in maintaining grid frequency stability. In summary, there are various valve position adaptive control methods for energy storage generator sets. The specific method selected depends on the application scenario, unit type, and control objectives. In actual application, flexible adjustment and optimization are required according to specific circumstances.

[0040] Example 2 like Figure 1 As shown, the valve position adaptation control method applied to the energy storage generator set provided by the present invention includes: The calculation method of the initial load 041 is as follows: the main steam pressure 001 is connected to the first function module 017, the first addition module 018 and the initial load 041 in sequence, and the value is finally obtained after judgment; the calculation method of the given valve position 042 is as follows: the output end of the sixth switching module 038 and the valve position upper limit 015 are both connected to the small value selection module 039, the output end of the small value selection module 039 and the valve position lower limit 016 are both connected to the large value selection module 040, and the output end of the large value selection module 040 is connected to the given valve position 042, and the value is finally obtained after judgment.

[0041] Example 3 like Figure 2As shown, through the implementation and application of the technology of the present invention within the scope of simulation, when the actual flow rate is lower than the target flow rate, the PID controller increases the valve opening. Conversely, when the actual flow rate is higher than the target flow rate, the valve opening is reduced. This adjustment is achieved by continuously calculating the deviation and applying the PID control algorithm until the actual flow rate matches the target flow rate. At the same time, the relationship between valve opening and PID output is dynamic, real-time, and affected by multiple factors. In actual application, it is necessary to select appropriate PID parameters according to the specific situation and perform debugging and optimization to achieve the best control effect.

[0042] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all points of view, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0043] In addition, it should be understood that although this specification describes the embodiments, not every embodiment contains only one independent technical solution. This description is for clarity only. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for the purpose of illustrating the technical concept of the present invention and cannot be used to limit the scope of protection of the present invention. Any changes made based on the technical solution in accordance with the technical concept proposed by the present invention fall within the scope of protection of the claims of the present invention.

Claims

1. The valve position adaptation control system applied to the energy storage generator set is characterized by: It includes a first function module (017) and a first addition module (018); The main steam pressure (001) is sequentially connected to the first function module (017), the first addition module (018) and the initial load (041).

2. The valve position adaptive control system for energy storage generator set according to claim 1, characterized in that: It also includes a first division module (019), a second addition module (020), a first switching module (021), a first subtraction module (023), a first comparison module (024), a first OR module (026) and a large selection module (040); The valve position change rate (002) is connected to the first division module (019), and the output end of the first division module (019) and the given valve position (003) are both connected to the second addition module (020); the given valve position (003) and the target valve position (004) are both connected to the first subtraction module (023), the output end of the first subtraction module (023) is connected to the first comparison module (024), and the output end of the first comparison module (024) and the load lower limit action (005) are both connected to the first OR module (026); the output end of the second addition module (020), the output end of the large selection module (040), and the output end of the first OR module (026) are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the first switching module (021).

3. The valve position adaptive control system for energy storage generator set according to claim 2, characterized in that: It also includes a first comparison module (025), a second OR module (027), a second subtraction module (028), a third OR module (029) and a second switching module (034); The valve position change rate (002) is connected to the first division module (019), the given valve position (003) and the output end of the first division module (019) are both connected to the second subtraction module (028), the given valve position (003) and the target valve position (004) are both connected to the first comparison greater than module (025), the load high limit action (006), the RB action (007), and the main steam pressure limit action (008) are all connected to the third OR module (029), and the output end of the third OR module (029) and the output end of the first comparison greater than module (025) are both connected to the second OR module (027); the output end of the second subtraction module (028), the output end of the first switching module (021), and the output end of the second OR module (027) are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the second switching module (034).

4. The valve position adaptation control system for an energy storage generator set according to claim 3, characterized in that: Also includes a fourth or module (030) and a third switching module (035); The load lower limit action (005), the output end of the third OR module (029), and the proceed (009) are all connected to the fourth OR module (030); the output end of the second switching module (034), the output end of the large value module (040), and the output end of the fourth OR module (030) are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the third switching module (035).

5. The valve position adaptive control system for energy storage generator set according to claim 4, characterized in that: Also includes a third adding module (022) and a fourth switching module (036); The output end of the third adding module (022), the output end of the fourth switching module (036), and the newly connected grid (010) are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the third switching module (035).

6. The valve position adaptive control system for energy storage generator set according to claim 5, characterized in that: Also includes a third subtraction module (031) and a fifth switching module (037); The total setting of the regulating valve (011) and the frequency modulation valve position value (012) are both connected to the third subtraction module (031), and the output end of the fourth switching module (036), the output end of the third subtraction module (031), and the valve position control (013) are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the fifth switching module (037).

7. The valve position adaptive control system for energy storage generator set according to claim 6, characterized in that: It also includes a first greater than or equal to module (032), a first and module (033) and a sixth switching module (038); The total setting of the regulating valve (011) is connected to the first greater than or equal to module (032), and the output end of the first greater than or equal to module (032) and the load lower limit action (014) are both connected to the first AND module (033); the output end of the large value module (040), the output end of the fifth switching module (037), and the output end of the first AND module (033) are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the sixth switching module (038).

8. The valve position adaptive control system for energy storage generator set according to claim 7, characterized in that: Also includes a small selection value module (039); The output end of the sixth switching module (038) and the valve position upper limit (015) are both connected to the small value selection module (039), and the output end of the small value selection module (039) and the valve position lower limit (016) are both connected to the large value selection module (040).

9. The valve position adaptive control system for energy storage generator set according to claim 8, characterized in that: The output end of the large value module (040) is connected to the given valve position (042).

10. A valve position adaptation control method applied to an energy storage generator set, characterized in that: The method is based on the valve position adaptation control system applied to the energy storage generator set according to claim 9, comprising: The calculation method of the initial load (041) is as follows: the main steam pressure (001) is connected to the first function module (017), the first addition module (018) and the initial load (041) in sequence, and finally a numerical value is obtained after judgment; the calculation method of the given valve position (042) is as follows: the output end of the sixth switching module (038) and the valve position upper limit (015) are both connected to the small value selection module (039), the output end of the small value selection module (039) and the valve position lower limit (016) are both connected to the large value selection module (040), the output end of the large value selection module (040) is connected to the given valve position (042), and finally a numerical value is obtained after judgment.

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