Speed regulation control method and system for energy storage generator set

Abstract

The application discloses a rotational speed regulating control method and system for energy storage generator units, and 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-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 non-module and a fourth OR module; the method comprises the following steps: calculating an actual control value of the first switching module, when the same period increase is 1, or the subtraction value of the given rotational speed and the target rotational speed is greater than -0.1, then the output of the first switching module is the output value after the speed-up rate calculation value and the given rotational speed are added; otherwise, the output of the first switching module is the given rotational speed. The application has the characteristics of fast and accurate regulation, and the frequency regulation effect is 20 times that of a traditional coal-fired unit.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of intelligent control of generator sets, and particularly relates to a rotational speed deployment control method and system for energy storage generator sets. BACKGROUND

[0002] An energy storage generator set is a new type of energy equipment that combines energy storage devices with generator sets. It plays a crucial role in modern power systems, especially in improving the stability and reliability of power grids. The working principle of an energy storage generator set 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 to convert the energy in the energy storage unit into electrical energy and supply it to the load. At the same time, the control system adjusts the rotational speed and output power of the generator set according to the stability and reliability requirements of the power grid.

[0003] Rotational speed deployment control of energy storage generator sets is an important technology in modern power systems, mainly used to improve the stability and reliability of power grids. The following is the background of rotational speed deployment control for energy storage generator sets:

[0004] Problem one: frequency stability problem. With the increasing proportion of new energy (such as wind power and photovoltaic) in the power system, the frequency stability of the power system faces greater challenges. The output power of these new energy sources has volatility and randomness, leading to imbalance between real-time power generation and load demand within the power grid, and thus affecting the stability of system frequency. Problem two: insufficient inertia support. Traditional inertia support resources are scarce, inertia level evaluation is difficult, and coordination of multiple frequency adjustment resources is difficult, resulting in increased frequency change rate, reduced frequency minimum point, and increased steady-state frequency deviation of the system under disturbance, and more frequent frequency instability problems.

[0005] Therefore, it is urgent to develop a rotational speed deployment 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

[0006] The purpose of the present application is to provide a rotational speed deployment control method and system for energy storage generator sets, which has the characteristics of fast and accurate adjustment, and the frequency modulation effect is 20 times that of traditional coal-fired units. The rotational speed deployment control method and system for energy storage generator sets can provide or absorb a large amount of electrical energy in a short time to quickly balance the power fluctuations within the power grid and maintain the stability of the system frequency.

[0007] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0008] The speed regulation control system for the energy storage generator set comprises a first adding module, a first subtracting module, a first switching module, a second subtracting 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.

[0009] The output end of the first adding module and the first OR module are respectively connected to the "Pv1" end and the "S" end of the first switching module; the output end of the second subtracting module is respectively connected to the first greater-than module and the second greater-than module, 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 subtracting 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, the "Pv2" end and the "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, the "Pv2" end and the "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 the "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 the "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.

[0010] The further improvement of the application is that the speed increasing rate calculation value and the given speed are both connected to the first adding module, and the given speed is also connected to the "Pv2" end of the first switching module.

[0011] The given speed and the target speed are both connected to the second subtracting module.

[0012] The further improvement of the application is that the same period increase is connected to the first OR module, the same period decrease is connected to the second OR module; and the same period increase and the same period decrease are also both connected to the third OR module.

[0013] The further improvement of the application is that the actual speed is connected to the "Pv1" end of the fourth switching module; and the DEH in the manual mode and the DEH in the monitoring mode are both connected to the fourth OR module.

[0014] The further improvement of the application is that the energy storage generator set operation and the steam turbine tripping are respectively connected to the "S" end and the "R" end of the first SR module; and the OPC action and the energy storage generator set grid connection are both connected to the fourth OR module.

[0015] The application discloses a rotating speed regulating control method for a storage power generating set.

[0016] The actual control value of the first switching module is calculated, and when the synchronization increase is 1 or the subtraction value of the given rotating speed from the target rotating speed is greater than -0.1, the first switching module outputs the output value after the addition of the speed increasing rate calculation value and the given rotating speed; otherwise, the first switching module outputs the given rotating speed.

[0017] The application further improves the rotating speed regulating control method for the storage power generating set.

[0018] The actual control value of the second switching module is calculated, and when the synchronization decrease is 1 or the subtraction value of the given rotating speed from the target rotating speed is greater than 0.1, the second switching module outputs the output value after the subtraction of the speed increasing rate calculation value from the given rotating speed; otherwise, the second switching module outputs the output value of the first switching module.

[0019] The application further improves the rotating speed regulating control method for the storage power generating set.

[0020] The actual control value of the third switching module is calculated, and when the synchronization increase is 1 or the synchronization decrease is 1, the third switching module outputs the output value of the second switching module; otherwise, the third switching module outputs the output value of the fifth switching module.

[0021] The application further improves the rotating speed regulating control method for the storage power generating set.

[0022] The actual control value of the fourth switching module is calculated, and when the DEH is in the manual mode and is 1, the motor check is input and is 1 or the storage power generating set is operated and is 1, the output of the fourth switching module is the actual rotating speed; otherwise, the output of the fourth switching module is the output value of the actual rotating speed.

[0023] The application further improves the rotating speed regulating control method for the storage power generating set.

[0024] The actual control value of the fifth switching module is calculated, and when the OPC is in the manual mode and is 1 or the storage power generating set is connected to the grid and is 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; and finally, the given rotating speed value of the storage power generating set is calculated.

[0025] Compared with the prior art, the application has at least the following beneficial technical effects:

[0026] The speed deployment control system for the energy storage generator set provided by the application can improve the frequency regulation performance of the system, and at the same time, avoid affecting the safe operation of the unit. Specifically, the system can monitor the fluctuation of the power grid frequency in real time, and based on advanced prediction algorithms and data analysis techniques, the frequency regulation demand can be predicted in advance. Subsequently, through the well-designed coordinated control strategy, the system can intelligently allocate the frequency regulation task to the energy storage system and the coal-fired generator set. The energy storage system can quickly adjust the output power to suppress short-term fluctuations in frequency due to its fast response characteristics; and the coal-fired generator set is responsible for providing frequency support on a longer time scale. This division of labor and cooperation not only significantly improves the frequency regulation performance of the entire system, so that the power grid frequency can be more stably maintained within the allowable range, but also maximizes the impact on the safe operation of the coal-fired generator set, prolongs its service life and reduces the operation and maintenance costs.

[0027] The speed deployment control method for the energy storage generator set provided by the application adopts the simulation of the rotational inertia of the energy storage generator set, and the energy storage system can provide an inertial response similar to traditional power sources, so as to participate 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.

[0028] In summary, the speed deployment control method and system for the energy storage generator set described in the application not only solve the frequency stability problem caused by the grid connection of new energy from a technical point of view, but also fully considers policy and market factors. Through the reasonable application of energy storage technology, the overall stability and reliability of the power system are effectively improved, which provides strong support for building a more green, intelligent and flexible power system. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0030] Figure 1 The schematic diagram of the high exhaust temperature control system suitable for the energy storage generator set.

[0031] Figure 2 The effect diagram of the embodiment of the application.

[0032] MARKED FOR EXPLANATION:

[0033] 001, ramp rate calculated value, 002, given speed, 003, target speed, 004, ramp up, 005, ramp down, 006, actual speed, 007, DEH in manual, 008, motoring engaged, 009, energy storage generator set running, 010, steam turbine tripped, 011, OPC action, 012, energy storage generator set grid connected, 013, first addition module, 014, first subtraction module, 015, first switch module, 016, second subtraction module, 017, second switch module, 018, first greater than module, 019, first OR module, 020, second greater than module, 021, second OR module, 022, third switch module, 023, fourth switch module, 024, third OR module, 025, fifth switch module, 026, fourth OR module, 027, first SR module, 028, first NOT module, 029, fourth OR module, 030, energy storage generator set given speed value. DETAILED DESCRIPTION

[0034] Hereinafter, certain exemplary embodiments will be described simply. As can be appreciated by those skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are to be regarded as illustrative in nature rather than restrictive.

[0035] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of convenience and simplification of the description of the present application, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0036] In addition, the terms "first", "second", etc. are used only for the purpose of description and should not be construed as indicating or implying relative importance or a specific number of the technical features indicated. Thus, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0037] In the present application, unless specifically defined otherwise and limited in the specification, the terms "mount", "connected", "connection", "fixed", and the like, should be construed broadly and do not necessarily require a direct connection or attachment between two elements. These terms can include indirect connections between two elements in the form of an indirect connection through one or more intermediate elements. In addition, a connection between two elements can be a mechanical connection, an electrical connection, or a communication connection. It will be apparent to those skilled in the art that these terms can have the same meaning as the corresponding terms used in the art.

[0038] In the present application, unless specifically defined otherwise and limited in the specification, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Below", "under" and "underneath" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0039] It should be understood that the terms "comprise" and "include" as used in the specification and the appended claims indicate the presence of the 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.

[0040] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application 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.

[0041] It should be further understood that the term "and / or" as used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations thereof.

[0042] Various structural diagrams according to the disclosed embodiments of the present application are shown in the accompanying drawings. These drawings are not drawn to scale, in which certain details are exaggerated for the purpose of clarity and certain details can be omitted. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are only exemplary, and in actuality can be deviated due to manufacturing tolerances or technical limitations, and regions / layers with different shapes, sizes and relative positions can be additionally designed by those skilled in the art according to actual needs.

[0043] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0044] Example 1

[0045] like Figure 1 As shown, the speed control system for energy storage generator sets provided by the present invention specifically includes: a rate of increase calculation value 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, a friction test engaged 008, energy storage generator set operation 009, a turbine tripped 010, an OPC action 011, and the energy storage generator set connected to the grid 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 for the energy storage generator set 030.

[0046] Figure 1 The control strategy logic diagram includes the following parts:

[0047] The calculated rate of increase (001) and the given speed (002) are both connected to the first summing module (013); the given speed (002) and the target speed (003) are both connected to the second subtraction module (016), the output of the second subtraction module (016) is connected to the first greater than module (018), and the output of the first greater than module (018) and the synchronous increase (004) are both connected to the first OR module (019); the output of the first summing module (013), the given speed (002), and the first OR module (019) are respectively connected to the "Pv1", "Pv2", and "S" terminals 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 of the second subtraction module 016 is connected to the second greater than module 020, and the output of the second greater than module 020 and the synchronous subtraction 005 are both connected to the second OR module 021; the output of the first subtraction module 014, the output of the first switching module 015, and the output of the second OR module 021 are respectively connected to the "Pv1", "Pv2", and "S" terminals of the second switching module 017; the synchronous increase 004 and the synchronous decrease 005 are both connected to the third OR module 024; the second The output terminals of switching module 017, the fifth switching module 025, and the third OR module 024 are respectively connected to the "Pv1", "Pv2", and "S" terminals of the third switching module 022; the energy storage generator set operation 009 and the turbine tripped 010 are respectively connected to the "S" and "R" terminals of the first SR module 027; the output terminal of the first SR module 027 is connected to the first non-module 028; the output terminals of DEH in manual mode 007, friction test engaged 008, and the first non-module 028 are all connected to the fourth OR module 026; The actual speed 006, the output terminal of the third switching module 022, and the output terminal of the fourth OR module 026 are respectively connected to the "Pv1", "Pv2", and "S" terminals of the fourth switching module 023; OPC action 011 and the grid connection of the energy storage generator set 012 are both connected to the fourth OR module 029; the output terminals of the fourth switching module 023 and the fourth OR module 029 are respectively connected to the "Pv2" and "S" terminals of the fifth switching module 025; the output terminal of the fifth switching module 025 is connected to the given speed value 030 of the energy storage generator set.

[0048] Example 2

[0049] like Figure 1 As shown, the speed regulation control method for energy storage generator sets provided by the present invention includes:

[0050] The first step is to calculate the actual control value of the first switching module 015. When the synchronization increase 004 is 1, or the difference between the given speed 002 and the target speed 003 is greater than -0.1, then the output of the first switching module 015 is the sum of the output value of the speed increase calculation value 001 and the given speed 002; otherwise, the output of the first switching module 015 is the given speed 002.

[0051] The second step is to calculate the actual control value of the second switching module 017. When the synchronization decrease 005 is 1, or the difference between the given speed 002 and the target speed 003 is greater than 0.1, then the output of the second switching module 017 is the difference between the output value of the speed increase 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.

[0052] The third step is to calculate the actual control value of the third switching module 022. When the synchronization increase 004 is 1 or the synchronization decrease 005 is 1, then 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.

[0053] The fourth step is to calculate the actual control value of the fourth switching module 023. When the DEH is in manual mode 007 is 1, or the motor check input 008 is 1, or the energy storage generator set is running 009 is 1, then 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.

[0054] 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 has been connected to the grid 012 is 1, then the output of the fifth switching module 025 is 3000; otherwise, the output 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.

[0055] Example 3

[0056] Through the implementation and application of the technology of the present application in the simulation range, the time specific range is within 0 to 37 minutes, and in the whole process of the speed rise of the energy storage generator set, the actual speed value of the energy storage generator set is guided and adjusted by the curve of the target speed given value. The results show that in the curve of the actual speed value, the overall process control effect is good, and according to the given target speed value of the present technology, the unit can dynamically follow the set value, the numerical fluctuation amplitude is small, the change rate is stable, and the target of the speed deployment control of the energy storage generator set proposed by the present application is met.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

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

2. The speed distribution control system for energy storage generator sets according to claim 1, characterized in that, The calculated rate of increase (001) and the given rotational speed (002) are both connected to the first summing module (013), and the given rotational 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 distribution control system for energy storage generator sets according to claim 2, characterized in that, Simultaneous increase (004) is connected to the first OR module (019), and simultaneous decrease (005) is connected to the second OR module (021); simultaneous increase (004) and simultaneous decrease (005) are also connected to the third OR module (024).

4. The speed distribution control system for energy storage generator sets according to claim 3, characterized in that, The actual rotational speed (006) is connected to the "Pv1" terminal of the fourth switching module (023); the DEH is connected to the fourth OR module (026) in both manual mode (007) and friction test activation (008).

5. The speed distribution control system for energy storage generator sets according to claim 4, characterized in that, The operation of the energy storage generator set (009) and the tripping of the steam turbine (010) are respectively connected to the "S" terminal and "R" terminal of the first SR module (027); the OPC action (011) and the grid connection of the energy storage generator set (012) are both connected to the fourth OR module (029).

6. A speed regulation control method for energy storage generator sets, characterized in that, This method, based on the speed distribution control system for energy storage generator sets as described in claim 5, includes: The actual control value of the first switching module (015) is calculated. When the synchronous increase (004) is 1, or the difference 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 acceleration calculation value (001) and the given speed (002); otherwise, the output of the first switching module (015) is the given speed (002).

7. The speed distribution control method for energy storage generator sets according to claim 6, characterized in that, Also includes: The actual control value of the second switching module (017) is calculated. When the synchronous reduction (005) is 1, or the difference 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 after subtracting the acceleration 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 distribution control method for energy storage generator sets according to claim 7, characterized in that, Also includes: 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).

9. The speed distribution control method for energy storage generator sets according to claim 8, characterized in that, Also includes: Calculate the actual control value of the fourth switching module (023). When DEH is 1 in manual mode (007), or when the friction test is engaged (008) or when 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).

10. The speed distribution control method for energy storage generator sets 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 is connected to the grid (012) is 1, the output of the fifth switching module (025) is 3000; otherwise, the output 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.

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