Coal-fired unit primary frequency modulation mode control system and method based on data driving

Abstract

The invention discloses a coal-fired unit primary frequency modulation mode control system and method based on data driving. The system comprises a first delay module, a first pulse module, a first AND module, a second AND module, a third AND module, a first switching module, a first function module, a second function module, a second switching module and a third switching module. The method comprises the following steps: when the output results of a first delay module and a first pulse module are 1, the output end of a first AND module is 1, otherwise, the output end of the first AND module is 0; when the output end of the first AND module is 1, the output of the first switching module is the numerical value of the real-time frequency modulation response quality based on data driving, and when the output end of the first AND module is 0, the output of the first switching module is 0. The method has important significance in improving the frequency modulation performance of the power grid, improving the external disturbance resistance of the power grid, enhancing the operation stability and building a strong power grid.

Description

Technical Field

[0001] This invention belongs to the field of intelligent control of generator sets, specifically relating to a data-driven primary frequency regulation mode control system and method for coal-fired power units. Background Technology

[0002] As the proportion of installed capacity from renewable energy sources continues to increase, their intermittent and fluctuating characteristics exacerbate the risk of grid frequency fluctuations. Traditional coal-fired power units, as the mainstay of stable power supply, need to shoulder more responsibility for system regulation to offset the uncertainties of renewable energy. Coal-fired power is transitioning from a primary power source to a basic, guaranteed, and system-regulating power source. Against this backdrop, the primary frequency regulation capability of coal-fired power units has become a key support for maintaining grid stability.

[0003] The limitations of existing control technologies are becoming increasingly apparent, mainly for the following reasons: 1) Limitations of traditional control strategies: Current mainstream control relies on preset parameters (such as speed inequality and dead zone settings), making it difficult to dynamically adapt to complex operating conditions. In actual operation, problems such as response lag and large overshoot are prone to occur, especially during high load periods, when the turbine control valve opening is limited, resulting in insufficient regulation margin.

[0004] 2) The dilemma of multi-objective coordination: Frequency regulation needs to balance response speed, stability, and economy. Simply increasing the frequency regulation reserve capacity will increase throttling losses; while excessive pursuit of economy may lead to regulation lag. Traditional manual parameter tuning methods can no longer meet the needs of refined control.

[0005] For the reasons mentioned above, it is urgent to develop a data-driven primary frequency regulation mode control system and method for coal-fired power units, so as to comprehensively improve the evaluation index requirements for frequency regulation performance and strengthen the assessment of dimensions such as response time and power contribution. Summary of the Invention

[0006] The purpose of this invention is to provide a data-driven primary frequency regulation mode control system and method for coal-fired power units. Through data acquisition and intelligent algorithms, the control parameters are dynamically optimized and the operating conditions are adapted, ultimately improving the stability and economy of the unit's frequency regulation performance. This is a key technological innovation direction to meet the challenges of new power systems, break through traditional control bottlenecks, and meet policy and regulatory requirements.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: The data-driven primary frequency regulation mode control system for coal-fired power units includes: a first delay module, a first pulse module, a first AND module, a second AND module, a third AND module, a first switching module, a first function module, a second function module, a second switching module, and a third switching module; The outputs of the first delay module and the first pulse module are both connected to the first AND module. The output of the first AND module is connected to the "S" terminal of the first switching module. The output of the first switching module is connected to the input of the first function module. The output of the first function module is connected to the "Pv1" terminal of the second switching module. The output of the first AND module is connected to the input of the second AND module. The output of the second AND module is connected to the "S" terminal of the second switching module. The output of the second switching module is connected to the "Pv2" terminal of the third switching module. The output of the first switching module is connected to the input of the second function module. The output of the second function module is connected to the "Pv1" terminal of the third switching module. The output of the third AND module is connected to the "S" terminal of the third switching module.

[0008] A further improvement of the present invention is that the data-driven real-time frequency modulation response quality is connected to the "Pv1" terminal of the first switching module.

[0009] A further improvement of the present invention is that a frequency modulation action is connected to the input terminal of the first delay module and the input terminal of the first pulse module respectively.

[0010] A further improvement of the present invention is that the frequency modulation load is connected to the input terminal of the second module.

[0011] A further improvement of the present invention is that the frequency modulation load reduction is connected to the "S" terminal of the third switching module.

[0012] A further improvement of the present invention is that the output of the third switching module is connected to the load command of the quality correction unit.

[0013] A data-driven primary frequency regulation mode control method for coal-fired power units, the method being based on the aforementioned data-driven primary frequency regulation mode control system for coal-fired power units, includes: When the outputs of the first delay module and the first pulse module are both 1, the output of the first AND module is 1; otherwise, the output of the first AND module is 0. When the output of the first AND module is 1, the output of the first switching module is a value of the real-time frequency modulation response quality based on data driving. When the output of the first AND module is 0, the output of the first switching module is 0.

[0014] A further improvement of the present invention is that it further includes: The value obtained by the first switching module after calculation by the first function module is applied to the "Pv1" terminal of the second switching module. At the same time, a frequency modulation action is applied to the first delay module and the first pulse module respectively. When the output results of the first delay module and the first pulse module are both 1, the output terminal of the first AND module is 1; otherwise, the output terminal of the first AND module is 0. When the frequency modulation load is 1 and the output terminal of the second AND module is 1, the output of the second switching module is the output value of the first function module; otherwise, the output of the second switching module is 0.

[0015] A further improvement of the present invention is that it further includes: The value obtained by the first switching module after calculation by the second function module is applied to the "Pv1" terminal of the third switching module. The output terminal of the second switching module is connected to the "Pv2" terminal of the third switching module. At the same time, a frequency modulation action is applied to the first delay module and the first pulse module respectively. When the output results of the first delay module and the first pulse module are both 1, the output terminal of the first AND module is 1; otherwise, the output terminal of the first AND module is 0.

[0016] A further improvement of the present invention is that it further includes: when the frequency modulation load reduction is 1 and the output terminal of the third AND module is 1, the output of the third switching module is the output value of the second function module; otherwise, the output of the third switching module is the output value of the second switching module.

[0017] Compared with the prior art, the present invention has at least the following beneficial technical effects: The data-driven primary frequency regulation mode control system for coal-fired power units provided by this invention uses tools such as Simulink to build a hybrid simulation platform that combines mechanistic models and data-driven models. This allows for testing the adaptability of different control strategies in a virtual environment, reducing the risks of field testing.

[0018] The data-driven primary frequency regulation mode control method for coal-fired power units provided by this invention adopts modern control technology to integrate various control strategies of the coordinated control system and the digital electro-hydraulic control system, and improves control quality through feedforward compensation, nonlinear correction and other means.

[0019] In summary, the data-driven primary frequency regulation mode control method and system for coal-fired power units described in this invention develops the primary frequency regulation characteristics and control optimization strategies of the unit, improves the primary frequency regulation capability of the unit, and is of great significance for improving the frequency regulation performance of the power grid, enhancing the power grid's ability to resist external disturbances, strengthening operational stability, and building a robust power grid. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the data-driven primary frequency regulation mode control system for coal-fired power units according to the present invention. Figure 2 This is a rendering of an embodiment of the present invention.

[0022] Explanation of reference numerals in the attached figures: 001. Data-driven real-time frequency regulation response quality; 002. Primary frequency regulation action; 003. Frequency regulation load increase; 004. Frequency regulation load decrease; 005. First delay module; 006. First pulse module; 007. First AND module; 008. Second AND module; 009. Third AND module; 010. First switching module; 011. First function module; 012. Second function module; 013. Second switching module; 014. Third switching module; 015. Adjustment quality correction of unit load command. Detailed Implementation

[0023] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0024] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0029] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this 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 also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0031] The accompanying drawings illustrate various structural schematic diagrams according to embodiments disclosed in this invention. These drawings are not to scale, and some details have been enlarged for clarity, and some details may have been omitted. The shapes of the various regions and layers shown in the drawings, as well as their relative sizes and positional relationships, are merely exemplary and may deviate from reality due to manufacturing tolerances or technical limitations. Furthermore, those skilled in the art can design regions / layers with different shapes, sizes, and relative positions as needed.

[0032] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0033] Example 1 like Figure 1 The diagram shown is a schematic of the control system for the primary frequency regulation mode of an energy storage generator set. The data-driven primary frequency regulation mode control system for a coal-fired power unit provided by this invention includes: a first delay module 005, a first pulse module 006, a first AND module 007, a second AND module 008, a third AND module 009, a first switching module 010, a first function module 011, a second function module 012, a second switching module 013, and a third switching module 014. The output terminals of the first delay module 005 and the first pulse module 006 are both connected to the first AND module 007, and the output terminal of the first AND module 007 is connected to the "S" terminal of the first switching module 010. The output of the first switching module 010... The output terminal is connected to the input terminal of the first function module 011, the output terminal of the first function module 011 is connected to the "Pv1" terminal of the second switching module 013, the output terminal of the first AND module 007 is connected to the input terminal of the second AND module 008, the output terminal of the second AND module 008 is connected to the "S" terminal of the second switching module 013; the output terminal of the second switching module 013 is connected to the "Pv2" terminal of the third switching module 014, the output terminal of the first switching module 010 is connected to the input terminal of the second function module 012, the output terminal of the second function module 012 is connected to the "Pv1" terminal of the third switching module 014, and the output terminal of the third AND module 009 is connected to the "S" terminal of the third switching module 014.

[0034] In this embodiment, the data-driven real-time frequency response quality 001 is connected to the "Pv1" terminal of the first switching module 010.

[0035] In this embodiment, the first frequency modulation action 002 is connected to the input terminal of the first delay module 005 and the input terminal of the first pulse module 006, respectively.

[0036] In this embodiment, the frequency modulation load increase 003 is connected to the input terminal of the second AND module 008.

[0037] In this embodiment, the frequency modulation load reduction 004 is connected to the "S" terminal of the third switching module 014.

[0038] In this embodiment, the output of the third switching module 014 is connected to the load command 015 for adjusting the quality correction unit.

[0039] Example 2 like Figure 1 The diagram shown is a schematic of the control system of the primary frequency regulation mode of the energy storage generator set. The data-driven primary frequency regulation mode control system of the coal-fired unit provided by the present invention includes: real-time frequency regulation response quality based on data driving 001, primary frequency regulation action 002, frequency regulation load increase 003, frequency regulation load decrease 004, first delay module 005, first pulse module 006, first AND module 007, second AND module 008, third AND module 009, first switching module 010, first function module 011, second function module 012, second switching module 013, third switching module 014, and adjustment quality correction unit load command 015.

[0040] The control connection method for adjusting the unit load command 015 is as follows: The data-driven real-time frequency modulation response quality 001 is connected to the "Pv1" terminal of the first switching module 010; the primary frequency modulation action 002 is connected to the input terminals of the first delay module 005 and the first pulse module 006 respectively; the output terminals of the first delay module 005 and the first pulse module 006 are both connected to the first AND module 007; the output terminal of the first AND module 007 is connected to the "S" terminal of the first switching module 010; the output terminal of the first switching module 010 is connected to the input terminal of the first function module 011; the output terminal of the first function module 011 is connected to the "Pv1" terminal of the second switching module 013. The outputs of frequency modulation load increase 003 and the first AND module 007 are connected to the input of the second AND module 008. The output of the second AND module 008 is connected to the "S" terminal of the second switching module 013. The output of the second switching module 013 is connected to the "Pv2" terminal of the third switching module 014. The output of the first switching module 010 is connected to the input of the second function module 012. The output of the second function module 012 is connected to the "Pv1" terminal of the third switching module 014. The outputs of frequency modulation load decrease 004 and the third AND module 009 are connected to the "S" terminal of the third switching module 014. The output of the third switching module 014 is connected to the load command 015 for adjusting the unit load.

[0041] Example 3 like Figure 1 The diagram shown is a schematic of the control system for a primary frequency regulation mode of an energy storage generator unit. The data-driven control method for the primary frequency regulation mode of a coal-fired power unit provided by this invention includes: The first step is to calculate the data-driven real-time frequency modulation response quality 001. Simultaneously, a frequency modulation action 002 is applied to the first delay module 005 and the first pulse module 006. When the outputs of the first delay module 005 and the first pulse module 006 are both 1, the output of the first AND module 007 is 1; otherwise, the output of the first AND module 007 is 0. When the output of the first AND module 007 is 1, the output of the first switching module 010 is the value of the data-driven real-time frequency modulation response quality 001. When the output of the first AND module 007 is 0, the output of the first switching module 010 is 0.

[0042] In the second step, the value obtained by the first switching module 010 after calculation by the first function module 011 is applied to the "Pv1" terminal of the second switching module 013. At the same time, the frequency modulation action 002 is applied to the first delay module 005 and the first pulse module 006 respectively. When the output results of the first delay module 005 and the first pulse module 006 are both 1, the output terminal of the first AND module 007 is 1; otherwise, the output terminal of the first AND module 007 is 0. When the frequency modulation load increase 003 is 1 and the output terminal of the second AND module 008 is 1, the output of the second switching module 013 is the output value of the first function module 011; otherwise, the output of the second switching module 013 is 0.

[0043] In the third step, the value obtained by the first switching module 010 after calculation by the second function module 012 is applied to the "Pv1" terminal of the third switching module 014. The output terminal of the second switching module 013 is connected to the "Pv2" terminal of the third switching module 014. At the same time, the frequency modulation action 002 is applied to the first delay module 005 and the first pulse module 006 respectively. When the output results of the first delay module 005 and the first pulse module 006 are both 1, the output terminal of the first AND module 007 is 1; otherwise, the output terminal of the first AND module 007 is 0. When the frequency modulation load reduction 004 is 1 and the output terminal of the third AND module 009 is 1, the output of the third switching module 014 is the output value of the second function module 012; otherwise, the output of the third switching module 014 is the output value of the second switching module 013.

[0044] The above method is to adjust the frequency regulation load and flow feedforward in real time based on the calculated output response qualification rate and contribution power qualification rate, so that the frequency regulation action results over a longer period of time are as close as possible to the ideal qualification range, and the unit meets the qualification index of frequency regulation response.

[0045] Example 2 like Figure 2As shown, through the implementation and application of the technology of this invention in a coal-fired power generating unit, within a time range of 750s to 1000s, the control effect of this invention, compared with the traditional control effect, exhibits smaller fluctuations in output control stability, avoiding the problem of difficulty in dynamically adapting to complex operating conditions. It also solves problems such as response lag and large overshoot that easily occur in actual operation, especially during high load periods, where the limited opening of the turbine control valve leads to insufficient regulation margin. Ultimately, it improves the stability and economy of the unit's frequency regulation performance, demonstrating excellent control effect.

[0046] In summary, this invention achieves dynamic optimization of control parameters and adaptive operation through data acquisition and intelligent algorithms, ultimately improving the stability and economy of unit frequency regulation performance. This represents a key technological innovation direction for addressing the challenges of new power systems, breaking through traditional control bottlenecks, and meeting policy and regulatory requirements.

[0047] 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.

[0048] 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 data-driven based primary frequency regulation mode control system for coal-fired units, characterized in that, Comprise: The first delay module (005), the first pulse module (006), the first and module (007), the second and module (008), the third and module (009), the first switch module (010), the first function module (011), the second function module (012), the second switch module (013) and the third switch module (014); The output end of the first delay module (005) and the output end of the first pulse module (006) are connected to the first and module (007), and the output end of the first and module (007) is connected to the "S" end of the first switch module (010); the output end of the first switch module (010) is connected to the input end of the first function module (011), the output end of the first function module (011) is connected to the "Pv1" end of the second switch module (013), the output end of the first and module (007) is connected to the input end of the second and module (008), and the output end of the second and module (008) is connected to the "S" end of the second switch module (013); the output end of the second switch module (013) is connected to the "Pv2" end of the third switch module (014), the output end of the first switch module (010) is connected to the input end of the second function module (012), the output end of the second function module (012) is connected to the "Pv1" end of the third switch module (014), and the output end of the third and module (009) is connected to the "S" end of the third switch module (014).

2. The data driven based primary frequency regulation mode control system for coal fired units as claimed in claim 1 wherein, The real-time frequency modulation response quality based on data driving (001) is connected to the "Pv1" end of the first switch module (010).

3. The data-driven based primary frequency regulation mode control system for coal-fired generating units according to claim 2, characterized in that, The primary frequency modulation action (002) is connected to the input end of the first delay module (005) and the input end of the first pulse module (006) respectively.

4. The data-driven based primary frequency regulation mode control system for coal-fired generating units according to claim 3, characterized in that, The frequency modulation load increase (003) is connected to the input end of the second and module (008).

5. The data-driven based primary frequency regulation mode control system for coal-fired generating units according to claim 4, characterized in that, The frequency modulation load decrease (004) is connected to the "S" end of the third switch module (014).

6. The data-driven based primary frequency regulation mode control system for coal-fired generating units according to claim 5, characterized in that, The output end of the third switch module (014) is connected to the regulation quality correction unit load instruction (015).

7. A data-driven based primary frequency regulation mode control method for coal-fired units, characterized in that, The method is based on the primary frequency modulation mode control system of the coal-fired unit based on data driving in claim 6, comprising: When the output results of the first delay module (005) and the first pulse module (006) are both 1, then the output end of the first and module (007) is 1, otherwise, the output end of the first and module (007) is 0; when the output end of the first and module (007) is 1, then the output of the first switch module (010) is the value of the real-time frequency modulation response quality based on data driving (001), and when the output end of the first and module (007) is 0, then the output of the first switch module (010) is 0.

8. The data-driven based primary frequency regulation mode control method of the coal-fired generating unit according to claim 7, characterized in that, Further comprise: The first switch module (010) is connected to the "Pv1" end of the second switch module (013) through the first function module (011). The frequency modulation action (002) is connected to the first delay module (005) and the first pulse module (006). When the output results of the first delay module (005) and the first pulse module (006) are both 1, the output end of the first and module (007) is 1. Otherwise, the output end of the first and module (007) is 0. When the frequency modulation load increase (003) is 1 and the output end of the second and module (008) is 1, the output of the second switch module (013) is the output value of the first function module (011). Otherwise, the output of the second switch module (013) is 0.

9. The data-driven based primary frequency regulation mode control method of the coal-fired generating unit according to claim 8, characterized in that, Also includes: The first switch module (010) is connected to the "Pv1" end of the third switch module (014) through the second function module (012). The output end of the second switch module (013) is connected to the "Pv2" end of the third switch module (014). The frequency modulation action (002) is connected to the first delay module (005) and the first pulse module (006). When the output results of the first delay module (005) and the first pulse module (006) are both 1, the output end of the first and module (007) is 1. Otherwise, the output end of the first and module (007) is 0.

10. The data-driven based primary frequency regulation mode control method of the coal-fired generating unit according to claim 9, characterized in that, Also includes: When the frequency modulation load decrease (004) is 1 and the output end of the third and module (009) is 1, the output of the third switch module (014) is the output value of the second function module (012). Otherwise, the output of the third switch module (014) is the output value of the second switch module (013).

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