Rotating speed allocation control method and system for energy storage generator set

Abstract

The invention discloses a rotating speed allocation control method and system for an energy storage generator set. The system comprises a first addition module, a first subtraction module, a first switching module, a second subtraction module, a second switching module, a first greater module, a first OR module, a second greater module, a second OR module, a third switching module, a fourth switching module, a third OR module, a fifth switching module, a fourth OR module and a first SR module. A first non-module and a fourth OR module; the method comprises the steps that an actual control value of a first switching module is calculated, and when the actual control value is increased to 1 in the same period or the subtraction value of a given rotating speed and a target rotating speed is larger than-0.1, the first switching module outputs an output value obtained by adding a speed increasing rate calculated value and the given rotating speed; otherwise, the first switching module outputs the given rotating speed. The invention has the characteristics of rapidness and accurate adjustment, and the frequency modulation effect is 20 times that of the traditional coal-fired unit.

Description

Technical Field

[0001] The present invention belongs to the field of intelligent control of generator sets, and particularly relates to a speed regulation control method and system for energy storage generator sets. Background Art

[0002] Energy storage generator sets are a new type of energy device that combines energy storage devices with generator sets. They play a vital role in modern power systems, particularly in improving grid stability and reliability. The operating principle of energy storage generator sets is relatively simple and efficient. When power demand is low, excess power is stored in the energy storage unit. When power demand increases, the control system starts the generator set, converting the energy in the energy storage unit into electricity and supplying it to the load. Simultaneously, the control system adjusts the generator set speed and output power based on the grid's stability and reliability requirements.

[0003] Speed ​​regulation control for energy storage generator sets is an important technology in modern power systems, primarily used to improve the stability and reliability of power grids. The following is the background on speed regulation control for energy storage generator sets: Problem 1: Frequency stability: As the proportion of renewable energy sources (such as wind power and photovoltaics) in the power system increases, the frequency stability of the power system faces greater challenges. The output power of these renewable energy sources is volatile and random, resulting in an imbalance between real-time power generation and load demand within the power grid, which in turn affects the stability of the system frequency. Problem 2: Insufficient inertia support: Traditional inertia support resources are scarce, increasing the difficulty of assessing inertia levels and coordinating multiple frequency adjustment resources. This increases the frequency change rate under disturbances, reduces the minimum frequency point, increases the steady-state frequency deviation, and makes frequency instability more frequent.

[0004] Therefore, it is urgent to develop a speed adjustment control method and system for energy storage generator sets to solve the above problems and challenges and achieve efficient and safe operation of energy storage generator sets. Summary of the Invention

[0005] The present invention aims to provide a speed regulation control method and system for energy storage generator sets, featuring rapid and precise regulation, with a frequency regulation effect 20 times greater than that of traditional coal-fired units. This method and system can quickly provide or absorb large amounts of power, thereby rapidly balancing power fluctuations within the power grid and maintaining system frequency stability.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A speed adjustment control system for an energy storage generator set includes a first addition module, a first subtraction module, a first switching module, a second subtraction module, a second switching module, a first greater than module, a first OR module, a second greater than module, a second OR module, a third switching module, a fourth switching module, a third OR module, a fifth switching module, a fourth OR module, a first SR module, a first NOT module, and a fourth OR module; The output end of the first addition module and the first OR module are respectively connected to the "Pv1" end and "S" end of the first switching module; the output end of the second subtraction module is respectively connected to the first greater than module and the second greater than module, and the output end of the first greater than module is connected to the first OR module; the output end of the second greater than module is connected to the second OR module; the output end of the first 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; the output end of the second switching module, the output end of the fifth switching module and the output end of the third OR module are respectively connected to the "Pv1" end, "Pv2" end and "S" end of the third switching module; the output end of the first SR module is connected to the first NOT module; the output end of the first NOT module is connected to the fourth OR module; the output end of the third switching module and the output end of the fourth OR module are respectively connected to the "Pv2" end and "S" end of the fourth switching module; the output end of the fourth switching module and the output end of the fourth OR module are respectively connected to the "Pv2" end and "S" end of the fifth switching module; the output end of the fifth switching module is connected to the given speed value of the energy storage generator set.

[0007] A further improvement of the present invention is that the calculated value of the acceleration rate and the given speed are both connected to the first adding module, and the given speed is also connected to the "Pv2" terminal of the first switching module; The commanded speed and the target speed are both connected to the second subtraction module.

[0008] A further improvement of the present invention is that the synchronous increase is connected to the first OR module, and the synchronous decrease is connected to the second OR module; the synchronous increase and the synchronous decrease are also connected to the third OR module.

[0009] A further improvement of the present invention is that the actual speed is connected to the "Pv1" end of the fourth switching module; the DEH is connected to the fourth or module in manual mode and friction test input.

[0010] A further improvement of the present invention is that the energy storage generator set is running and the steam turbine has tripped and is respectively connected to the "S" end and "R" end of the first SR module; the OPC action and the energy storage generator set is grid-connected are both connected to the fourth or module.

[0011] A speed adjustment control method for an energy storage generator set, based on the speed adjustment control system for the energy storage generator set, includes: Calculate the actual control value of the first switching module. When the synchronous increase is 1, or the subtraction value between the given speed and the target speed is greater than -0.1, the output of the first switching module is the output value of the addition of the calculated value of the acceleration rate and the given speed; otherwise, the output of the first switching module is the given speed.

[0012] A further improvement of the present invention is that it also includes: Calculate the actual control value of the second switching module. When the synchronous value is reduced to 1, or the subtraction value between the given speed and the target speed is greater than 0.1, the output of the second switching module is the output value after subtracting the calculated value of the acceleration rate from the given speed; otherwise, the output of the second switching module is the output value of the first switching module.

[0013] A further improvement of the present invention is that it also includes: Calculate the actual control value of the third switching module. When the synchronous increase is 1 or the synchronous decrease is 1, the output of the third switching module is the output value of the second switching module; otherwise, the output of the third switching module is the output value of the fifth switching module.

[0014] A further improvement of the present invention is that it also includes: Calculate the actual control value of the fourth switching module. When the DEH is in manual mode at 1, or the friction inspection input is at 1, or the energy storage generator set is running at 1, the output of the fourth switching module is the actual speed; otherwise, the output of the fourth switching module is the output value of the actual speed.

[0015] A further improvement of the present invention is that it also includes: Calculate the actual control value of the fifth switching module. When the OPC action is 1 or the energy storage generator set is grid-connected to 1, the output end of the fifth switching module is 3000; otherwise, the output end of the fifth switching module is the output value of the fourth switching module. Finally, the given speed value of the energy storage generator set is calculated.

[0016] Compared with the prior art, the present invention has at least the following beneficial technical effects: The speed regulation control system for energy storage generator sets provided by this invention utilizes a coordinated control strategy that allows the energy storage system and coal-fired generator sets to jointly respond to AGC frequency regulation dispatch commands. This system improves the system's frequency regulation performance while minimizing impacts on the safe operation of the generator sets. Specifically, the system monitors grid frequency fluctuations in real time and, based on advanced prediction algorithms and data analysis techniques, anticipates frequency regulation needs. Subsequently, through a carefully designed coordinated control strategy, the system intelligently allocates frequency regulation tasks between the energy storage system and the coal-fired generator sets. The energy storage system, with its rapid response, can rapidly adjust its output power to smooth short-term frequency fluctuations, while the coal-fired generator sets provide frequency support over longer timescales. This division of labor and cooperation not only significantly improves the frequency regulation performance of the entire system, enabling the grid frequency to be more stably maintained within the permitted range, but also minimizes impacts on the safe operation of the coal-fired generator sets, extending their service life and reducing operation and maintenance costs.

[0017] The speed regulation control method for energy storage generator sets provided by the present invention simulates the rotational inertia of the energy storage generator sets. The energy storage system can provide an inertial response similar to that of a traditional power supply, thereby participating in the primary frequency regulation of the power grid. This method helps to reduce the maximum deviation of the power grid frequency and speed up the response speed.

[0018] In summary, the energy storage generator speed adjustment and control method and system described in the present invention not only solves the frequency stability problem caused by the grid connection of new energy from a technical perspective, but also fully considers policy and market factors. Through the rational application of energy storage technology, it effectively improves the overall stability and reliability of the power system, providing strong support for building a greener, smarter, and more flexible power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 The schematic diagram of the high-exhaust temperature control system suitable for energy storage generator sets.

[0021] Figure 2 This is a rendering of an embodiment of the present invention.

[0022] Description of reference numerals: 001, calculated value of the acceleration rate, 002, given speed, 003, target speed, 004, synchronous increase, 005, synchronous decrease, 006, actual speed, 007, DEH in manual mode, 008, friction inspection enabled, 009, energy storage generator set running, 010, turbine tripped, 011, OPC action, 012, energy storage generator set connected to the grid, 013, first addition module, 014, first subtraction module, 015, first switching module, 016, The second subtraction module, 017, the second switching module, 018, the first greater than module, 019, the first OR module, 020, the second greater than module, 021, the second OR module, 022, the third switching module, 023, the fourth switching module, 024, the third OR module, 025, the fifth switching module, 026, the fourth OR module, 027, the first SR module, 028, the first non-module, 029, the fourth OR module, 030, the given speed value of the energy storage generator set. DETAILED DESCRIPTION

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0033] Example 1 like Figure 1 As shown, the speed allocation control system for the energy storage generator set provided by the present invention specifically includes: a calculated value of the acceleration rate 001, a given speed 002, a target speed 003, a synchronous increase 004, a synchronous decrease 005, an actual speed 006, DEH in manual mode 007, friction inspection input 008, the energy storage generator set running 009, the steam turbine tripped 010, the OPC action 011, the energy storage generator set grid-connected 012, a first addition module 013, a first subtraction module 014, a first switching module 015, a second subtraction module 016, a second switching module 017, a first greater than module 018, a first OR module 019, a second greater than module 020, a second OR module 021, a third switching module 022, a fourth switching module 023, a third OR module 024, a fifth switching module 025, a fourth OR module 026, a first SR module 027, a first NOT module 028, a fourth OR module 029, and a given speed value 030 of the energy storage generator set.

[0034] Figure 1 The control strategy logic diagram includes the following parts: The calculated value of the rate of increase 001 and the given speed 002 are both connected to the first adding module 013; the given speed 002 and the target speed 003 are both connected to the second subtracting module 016, the output end of the second subtracting module 016 is connected to the first greater than module 018, the output end of the first greater than module 018 and the synchronous increase 004 are both connected to the first OR module 019; the output end of the first adding module 013, the given speed 002, and the first OR module 019 are respectively connected to the "Pv1" end, the "Pv2" end, and the "S" end of the first switching module 015; the rate of increase meter The calculated value 001 and the given speed 002 are both connected to the first subtraction module 014; the output end of the second subtraction module 016 is connected to the second greater than module 020, and the output end of the second greater than module 020 and the synchronous subtraction 005 are both connected to the second OR module 021; the output end of the first subtraction module 014, the output end of the first switching module 015 and the output end of the second OR module 021 are respectively connected to the "Pv1" end, "Pv2" end and "S" end of the second switching module 017; the synchronous increase 004 and the synchronous subtraction 005 are both connected to the third OR module 024; the second The output end of the switching module 017, the output end of the fifth switching module 025, and the output end of the third OR module 024 are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the third switching module 022; the energy storage generator set operation 009 and the steam turbine tripped 010 are respectively connected to the "S" end and "R" end of the first SR module 027, and the output end of the first SR module 027 is connected to the first non-module 028. The output ends of the DEH in manual mode 007, the friction test input 008, and the first non-module 028 are all connected to the fourth OR module 026; The actual speed 006, the output end of the third switching module 022, and the output end of the fourth OR module 026 are respectively connected to the "Pv1" end, "Pv2" end, and "S" end of the fourth switching module 023; the OPC action 011 and the energy storage generator set have been connected to the grid 012 are both connected to the fourth OR module 029; the output end of the fourth switching module 023 and the output end of the fourth OR module 029 are respectively connected to the "Pv2" end and "S" end of the fifth switching module 025; the output end of the fifth switching module 025 is connected to the given speed value 030 of the energy storage generator set.

[0035] Example 2 like Figure 1 As shown, the speed adjustment control method for the energy storage generator set provided by the present invention includes: The first step is to calculate the actual control value of the first switching module 015. When the synchronous increase 004 is 1, or the subtraction between the given speed 002 and the target speed 003 is greater than -0.1, the output of the first switching module 015 is the sum of the calculated acceleration rate 001 and the given speed 002. Otherwise, the output of the first switching module 015 is the given speed 002. The second step is to calculate the actual control value of the second switching module 017. When the synchronous subtraction 005 is 1, or the subtraction value between the given speed 002 and the target speed 003 is greater than 0.1, the output of the second switching module 017 is the output value of the acceleration rate calculation value 001 and the given speed 002. Otherwise, the output of the second switching module 017 is the output value of the first switching module 015. The third step is to calculate the actual control value of the third switching module 022. When the synchronous increase 004 is 1 or the synchronous decrease 005 is 1, the output of the third switching module 022 is the output value of the second switching module 017; otherwise, the output of the third switching module 022 is the output value of the fifth switching module 025. Step 4: Calculate the actual control value of the fourth switching module 023. When the DEH is in manual mode 007 and is 1, or the friction test input 008 and is 1, or the energy storage generator set is running 009 and is 1, the output of the fourth switching module 023 is the actual speed 006. Otherwise, the output of the fourth switching module 023 is the output value of the actual speed 006. The fifth step is to calculate the actual control value of the fifth switching module 025. When the OPC action 011 is 1 or the energy storage generator set is connected to the grid 012 is 1, the output end of the fifth switching module 025 is 3000; otherwise, the output end of the fifth switching module 025 is the output value of the fourth switching module 023. Finally, the given speed value 030 of the energy storage generator set is calculated.

[0036] Example 3 Through the implementation and application of the technology of the present invention within the scope of simulation, the specific time range is within 0 to 37 minutes. During the entire process of the energy storage generator set speed rising, the "target speed set value" curve is used to guide and adjust the actual speed value of the energy storage generator set. The results show that in the "actual speed value" curve, the overall process control effect is good, and according to the given target speed value of this technology, the unit can dynamically follow the set value. The numerical fluctuation amplitude of the whole process is small and the change rate is stable, which meets the goal of speed allocation control for energy storage generator sets proposed by the present invention.

[0037] 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.

[0038] 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. A speed adjustment control system for energy storage generator sets, characterized in that: It includes a first adding module (013), a first subtracting module (014), a first switching module (015), a second subtracting module (016), a second switching module (017), a first greater than module (018), a first OR module (019), a second greater than module (020), a second OR module (021), a third switching module (022), a fourth switching module (023), a third OR module (024), a fifth switching module (025), a fourth OR module (026), a first SR module (027), a first non-module (028) and a fourth OR module (029); The output end of the first adding module (013) and the first OR module (019) are respectively connected to the "Pv1" end and the "S" end of the first switching module (015); the output end of the second subtracting module (016) is respectively connected to the first greater than module (018) and the second greater than module (020), and the output end of the first greater than module (018) is connected to the first OR module (019); the output end of the second greater than module (020) is connected to the second OR module (021); the output end of the first subtracting module (014), the output end of the first switching module (015) and the output end of the second OR module (021) are respectively connected to the "Pv1" end, the "Pv2" end and the "S" end of the second switching module (017); the output end of the second switching module (017), the output end of the fifth switching module (025) The output end of the third or module (024) is connected to the "Pv1" end, the "Pv2" end, and the "S" end of the third switching module (022) respectively; the output end of the first SR module (027) is connected to the first non-module (028); the output end of the first non-module (028) is connected to the fourth or module (026); the output end of the third switching module (022) and the output end of the fourth or module (026) are connected to the "Pv2" end and the "S" end of the fourth switching module (023) respectively; the output end of the fourth switching module (023) and the output end of the fourth or module (029) are connected to the "Pv2" end and the "S" end of the fifth switching module (025) respectively; the output end of the fifth switching module (025) is connected to the given speed value (030) of the energy storage generator set.

2. The speed adjustment control system for energy storage generator set according to claim 1 is characterized in that: The acceleration rate calculation value (001) and the given rotation speed (002) are both connected to the first adding module (013), and the given rotation speed (002) is also connected to the "Pv2" terminal of the first switching module (015); The given speed (002) and the target speed (003) are both connected to the second subtraction module (016).

3. The speed adjustment control system for energy storage generator set according to claim 2 is characterized in that: The synchronous increase (004) is connected to the first or module (019), and the synchronous decrease (005) is connected to the second or module (021); the synchronous increase (004) and the synchronous decrease (005) are also connected to the third or module (024).

4. The speed adjustment control system for energy storage generator set according to claim 3 is characterized in that: The actual speed (006) is connected to the "Pv1" terminal of the fourth switching module (023); DEH is connected to the fourth OR module (026) in both manual mode (007) and friction inspection input (008).

5. The speed adjustment control system for energy storage generator set according to claim 4 is characterized in that: The energy storage generator set is running (009) and the steam turbine has tripped (010) are respectively connected to the "S" end and the "R" end of the first SR module (027); OPC action (011) and the energy storage generator set has been connected to the grid (012) are both connected to the fourth OR module (029).

6. A speed adjustment control method for an energy storage generator set, characterized in that: The method is based on the speed adjustment control system for the energy storage generator set according to claim 5, and comprises: The actual control value of the first switching module (015) is calculated. When the synchronous increase (004) is 1, or the subtraction value between the given speed (002) and the target speed (003) is greater than -0.1, the output of the first switching module (015) is the output value of the addition of the calculated value of the acceleration rate (001) and the given speed (002); otherwise, the output of the first switching module (015) is the given speed (002).

7. The speed adjustment control method for energy storage generator set according to claim 6 is characterized in that: Also includes: The actual control value of the second switching module (017) is calculated. When the synchronous subtraction (005) is 1, or the subtraction value between the given speed (002) and the target speed (003) is greater than 0.1, the output of the second switching module (017) is the output value obtained by subtracting the acceleration rate calculation value (001) and the given speed (002); otherwise, the output of the second switching module (017) is the output value of the first switching module (015).

8. The speed adjustment control method for energy storage generator set according to claim 7 is characterized in that: Also includes: The actual control value of the third switching module (022) is calculated. When the synchronous increase (004) is 1 or the synchronous decrease (005) is 1, the output of the third switching module (022) is the output value of the second switching module (017); otherwise, the output of the third switching module (022) is the output value of the fifth switching module (025).

9. The speed adjustment control method for energy storage generator set according to claim 8, characterized in that: Also includes: The actual control value of the fourth switching module (023) is calculated. When the DEH is in manual mode (007) and is 1, or the friction inspection input (008) is 1, or the energy storage generator set operation (009) is 1, the output of the fourth switching module (023) is the actual speed (006); otherwise, the output of the fourth switching module (023) is the output value of the actual speed (006).

10. The speed adjustment control method for energy storage generator set according to claim 9, characterized in that: Also includes: The actual control value of the fifth switching module (025) is calculated. When the OPC action (011) is 1 or the energy storage generator set has been connected to the grid (012) is 1, the output end of the fifth switching module (025) is 3000; otherwise, the output end of the fifth switching module (025) is the output value of the fourth switching module (023); and finally the given speed value (030) of the energy storage generator set is calculated.

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