Thermal power flywheel energy storage coordinated optimization control method and device

Abstract

The application discloses a thermal power flywheel energy storage coordinated optimization control method and device, and the method comprises the following steps: collecting the power grid frequency deviation or receiving the AGC instruction to determine the overall frequency modulation power demand of the system; the flywheel energy storage bears the frequency modulation task in full at the initial stage of the frequency disturbance, so that the fast millisecond-level power response is realized; after the initial stage, the variable load speed of the thermal power unit is dynamically adjusted in combination with the boiler operation parameters, the frequency modulation power is gradually taken over, and the output difference is compensated in real time; after the unit output approaches the target value and the overall deviation reaches the standard, the flywheel is used to complete the steady-state precision adjustment, and the charging and discharging instructions are issued according to the state of charge, so that the energy storage operation is maintained in the healthy interval. The application fully combines the advantages of the fast response of the flywheel and the strong load-carrying capacity of the thermal power unit, improves the power grid frequency modulation response speed and control precision, and guarantees the long-term stable operation of the energy storage equipment.

Description

Technical Field

[0001] This invention relates to the field of power system automatic control and energy storage integration technology, and in particular to a method and device for coordinated optimization control of thermal power flywheel energy storage. Background Technology

[0002] As a fundamental regulating power source in the power system, thermal power's frequency regulation performance is crucial for grid frequency stability in the context of large-scale grid integration of new energy sources. Among related technologies, a thermal power-flywheel joint frequency regulation system has been constructed through the coordinated operation of the distributed control system (DCS) of thermal power units, flywheel energy storage systems, and remote terminal units (RTUs). Specifically, this system covers the entire process from the issuance of automatic generation control (AGC) commands to the transmission of total output from the joint system, including key aspects such as millisecond-level power response of the flywheel, load regulation of thermal power units, and data acquisition and transmission by the RTUs.

[0003] However, existing thermal power-flywheel joint frequency regulation methods directly use the plant-level energy management system (EMS) as the control center, without delegating control decisions to the DCS. This can lead to high system modification costs, long implementation cycles, or communication delays between the EMS and DCS affecting the speed of coordinated response, thus restricting the full realization of the joint system's frequency regulation performance. Furthermore, traditional methods lack real-time constraints on key safety parameters such as boiler main steam pressure and temperature. Frequent rapid load adjustments can easily trigger safety accidents such as over-temperature and over-pressure, seriously affecting the unit's operational reliability. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the first objective of this invention is to propose a coordinated and optimized control method for thermal power flywheel energy storage.

[0006] Another objective of this invention is to provide a coordinated and optimized control device for thermal power flywheel energy storage.

[0007] The third objective of this invention is to provide a computer device.

[0008] A fourth objective of this invention is to provide a non-transitory computer-readable storage medium.

[0009] To achieve the above objectives, a first aspect of the present invention proposes a method for coordinated and optimized control of thermal power flywheel energy storage, comprising:

[0010] S1 detects grid frequency deviation signals or receives grid automatic generation control commands to determine the total frequency regulation power demand of the joint system. S2, In the initial period after the frequency disturbance occurs, the flywheel energy storage system is controlled to undertake all or most of the total frequency regulation power demand, achieving millisecond-level power support; S3, after the initial period ends, dynamically adjust the load change rate of the thermal power unit according to the real-time status of the key boiler parameters, control the thermal power unit to gradually take over the power change borne by the flywheel energy storage system, and at the same time compensate the difference between the actual output of the thermal power unit and the total frequency regulation power demand in real time. S4, when the output of the thermal power unit is close to the target value and the total output deviation enters the preset range, the control flywheel energy storage system is finely adjusted to eliminate the steady-state deviation, and charging and discharging commands are embedded according to the state of charge of the flywheel energy storage system to maintain its state of charge within the healthy range.

[0011] In one embodiment of the present invention, S1 includes: When the absolute value of the grid frequency deviation is detected to be greater than or equal to the preset dead zone, the total frequency regulation power demand is calculated based on the unit's predetermined primary frequency regulation difference rate. Receive automatic generation control commands issued by the power grid dispatch center and determine the total frequency regulation power demand of the joint system.

[0012] In one embodiment of the present invention, S2 includes: Within the first 5 seconds after a frequency disturbance occurs, the flywheel energy storage system undertakes all or most of the total frequency regulation power demand, achieving millisecond-level power support.

[0013] In one embodiment of the present invention, S3 includes: The real-time output increment prediction model is activated, and the maximum safe load change rate of the thermal power unit under the current operating conditions is calculated by combining the current boiler steam temperature and pressure parameters. The thermal power unit is then controlled to climb to the new target load point at a rate not greater than the maximum safe load change rate. The weighting coefficients are dynamically adjusted based on the real-time status of the boiler's key parameters. These weighting coefficients are used to allocate the rapid response component undertaken by the flywheel energy storage system.

[0014] In one embodiment of the present invention, it further includes: Based on the formula:

[0015] Calculate the real-time target output command of the flywheel energy storage system, where The total frequency regulation power demand corresponding to the automatic generation control command of the power grid. For thermal power units at time The actual ramp rate enables the flywheel energy storage system to compensate for the difference between the ramp output of the thermal power unit and the total demand in real time.

[0016] In one embodiment of the present invention, S4 includes: When the output of the thermal power unit is close to the target value and the total output deviation is within ±500kW, the small power unit of the flywheel energy storage system will make fine adjustments to eliminate the steady-state deviation. Small-amplitude charge and discharge commands are embedded in the intervals or reverse commands of automatic generation control commands, so that the net charge and discharge of the flywheel energy storage system is close to zero in the daily cycle, maintaining its state of charge within a healthy range of 40% to 60%.

[0017] In one embodiment of the present invention, it further includes: When the key parameters of the boiler exceed the preset safety threshold, the variable load rate setting value of the thermal power unit is forcibly reduced, and the distribution weight of the flywheel energy storage system output is dynamically increased to use the flywheel energy storage system for buffering to ensure boiler safety.

[0018] To achieve the above objectives, a second aspect of the present invention provides a coordinated optimization control device for thermal power flywheel energy storage, comprising: The joint frequency regulation demand analysis module is used to detect grid frequency deviation signals or receive grid automatic generation control commands to determine the total frequency regulation power demand of the joint system. The flywheel short-time power support module is used to control the flywheel energy storage system to undertake all or most of the total frequency regulation power demand during the initial period after a frequency disturbance occurs, thereby achieving millisecond-level power support. The unit collaborative power takeover module is used to dynamically adjust the load change rate of the thermal power unit according to the real-time status of the key boiler parameters after the initial period ends, control the thermal power unit to gradually take over the power change undertaken by the flywheel energy storage system, and at the same time compensate for the difference between the actual output of the thermal power unit and the total frequency regulation power demand in real time. The steady-state deviation fine-tuning and energy storage balancing module is used to control the flywheel energy storage system to make fine adjustments to eliminate steady-state deviation when the output of the thermal power unit is close to the target value and the total output deviation enters the preset range. It also embeds charging and discharging commands according to the state of charge of the flywheel energy storage system to maintain its state of charge within a healthy range.

[0019] The present invention discloses a method and device for coordinated optimization control of thermal power flywheel energy storage, which can significantly improve the primary frequency regulation response speed and AGC regulation rate of the combined thermal power unit and flywheel energy storage system, while effectively suppressing the fluctuation of boiler main steam pressure and temperature, and ensuring the safe operation of the unit.

[0020] To achieve the above objectives, a third aspect of this application provides a computer device, including a processor and a memory; wherein the processor runs a program corresponding to the executable program code by reading executable program code stored in the memory, for implementing the method described in the first aspect embodiment.

[0021] To achieve the above objectives, a fourth aspect of this application provides a non-transitory computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the method described in the first aspect.

[0022] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] Figure 1 This is a flowchart of a coordinated optimization control method for thermal power flywheel energy storage according to an embodiment of the present invention; Figure 2 This is a structural diagram of a thermal power flywheel energy storage coordinated optimization control device according to an embodiment of the present invention; Figure 3 It is a computer device according to an embodiment of the present invention. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] The following description, with reference to the accompanying drawings, describes a method and apparatus for coordinated optimization control of thermal power flywheel energy storage according to an embodiment of the present invention.

[0027] Figure 1 This is a flowchart of a coordinated optimization control method for thermal power flywheel energy storage according to an embodiment of the present invention, such as... Figure 1 As shown, it includes: S1 detects grid frequency deviation signals or receives grid automatic generation control commands to determine the total frequency regulation power demand of the joint system. S2, In the initial period after the frequency disturbance occurs, the flywheel energy storage system is controlled to undertake all or most of the total frequency regulation power demand, achieving millisecond-level power support; S3, after the initial period ends, dynamically adjust the load change rate of the thermal power unit according to the real-time status of the key boiler parameters, control the thermal power unit to gradually take over the power change borne by the flywheel energy storage system, and at the same time compensate the difference between the actual output of the thermal power unit and the total frequency regulation power demand in real time. S4, when the output of the thermal power unit is close to the target value and the total output deviation enters the preset range, the control flywheel energy storage system is finely adjusted to eliminate the steady-state deviation, and charging and discharging commands are embedded according to the state of charge of the flywheel energy storage system to maintain its state of charge within the healthy range.

[0028] This invention proposes a coordinated optimization control system for flywheel energy storage in thermal power plants. The control decision-making center is decentralized from the traditional plant-level EMS to the DCS of the thermal power unit. A new "coordinated power allocation module" is added to the DCS to replace the optimization calculation function of the EMS. The RTU only serves as a channel for issuing grid dispatch commands and an interface for transmitting the total output of the combined system; its original data acquisition and transmission functions remain unchanged, and it does not undertake any control decision-making tasks. The flywheel energy storage system directly receives precise power commands from the DCS, thereby achieving millisecond-level coordinated response with the thermal power unit. The system mainly includes an upgraded thermal power unit DCS system, a flywheel energy storage control system, and the existing RTU device. The control logic is designed as two relatively independent but interconnected subsystems: a primary frequency regulation optimization subsystem and an AGC three-stage optimization subsystem, which deeply integrate boiler operation safety constraint mechanisms and flywheel SOC adaptive management strategies.

[0029] Furthermore, the system of the present invention consists of the following four parts connected by a communication network: The DCS system for thermal power units (including upgrade modules) includes: A coordinated power allocation module: This is the core functional module of the invention, embedded within the DCS. It receives grid AGC commands forwarded by the RTU (or commands directly connected via hardwiring), and grid frequency deviation signals (Δf) from the unit's measurement points. A real-time output increment prediction unit: Integrated within the coordinated power allocation module, based on a simplified boiler dynamic mechanism model or a neural network model trained with field data, predicts in real-time the maximum safe load change rate and output increment of the thermal power unit that can be supported by changes in boiler energy storage within the next tens of seconds. An adaptive weight calculation and allocation unit: Based on the grid command type (primary frequency regulation or AGC), amplitude, real-time status of key boiler parameters (main steam pressure, temperature), flywheel SOC, and the above prediction results, it dynamically calculates and allocates the target output commands (P_{thermal}^) between the thermal power unit and the flywheel energy storage system. \) and \(P_{flywheel}^ Safety constraint control loop: Real-time monitoring of main steam pressure and temperature. When any parameter exceeds the preset safety threshold (e.g., main steam pressure > 17.5 MPa, or main steam temperature > 545℃), this loop automatically intervenes, forcibly reducing the load change rate setpoint of the thermal power unit and dynamically increasing the distribution weight of flywheel output. By using the flywheel as a "buffer," it ensures that the total output response is not affected while protecting boiler safety.

[0030] Furthermore, the flywheel energy storage control system receives and rapidly responds to target power commands issued by the DCS coordinated power distribution module. It possesses local real-time SOC monitoring and charge / discharge protection logic (e.g., prohibiting charging when SOC > 90% and prohibiting discharging when SOC < 10%). Its power response delay should be less than 10 milliseconds, possessing continuous and rapid power regulation capabilities (e.g., ±5.5MW in the example). RTU unit (existing equipment, functional expansion): Data acquisition: Acquires the actual output of the thermal power unit (P_{thermal}\) and the actual output of the flywheel energy storage system (P_{flywheel}\) via hardwiring or communication. Power synthesis and uploading: Calculates the total output of the combined system. \(P_{total}=P_{thermal}+P_{flywheel}\), This (P_{total}) is then transmitted to the power grid dispatch center as the total active power of the power plant, meeting the requirements of the measured point for AGC assessment. Command forwarding: Receives AGC commands issued by the power grid dispatch center and forwards them to the DCS's coordinated power allocation module via analog output (4-20mA) or communication protocol. Key characteristics: In this solution, the RTU does not execute any control algorithms or logical judgments; it only serves as a reliable data channel and interface device.

[0031] Furthermore, regarding the communication interface: the DCS system and the flywheel energy storage control system are connected using standard industrial communication protocols, such as IEC61850, Modbus TCP / IP, or PROFINET, to ensure the real-time performance and reliability of power command transmission. The transmission path for AGC commands can be flexibly selected according to field conditions: it can be forwarded to the DCS via the RTU's remote adjustment channel; or, to improve reliability, it can be directly connected to the DCS via independent hardwiring (analog signals) or a dedicated fiber optic network.

[0032] The control method of this invention consists of the following three parts working together: Primary frequency regulation coordination control method: When the DCS detects a grid frequency deviation Δf (typically |Δf|≥0.03Hz dead zone), it immediately triggers the primary frequency regulation coordination control logic. The DCS calculates the total frequency regulation power demand based on the unit's predetermined primary frequency regulation differential rate (K_p): ΔP_{total}=-K_p\cdotΔf\. Flywheel priority rapid response: Within the first 5 seconds after a frequency disturbance occurs, the flywheel energy storage system undertakes all or most (e.g., 100% when |ΔP|≤5MW) of the ΔP_{total}, achieving millisecond-level power support. Smooth takeover of thermal power units: Starting from the 5th second, the thermal power unit begins to operate according to the dynamically corrected droop characteristics (its equivalent droop coefficient R value is dynamically adjusted according to the boiler energy storage status), gradually taking over the power change undertaken by the flywheel, so that the flywheel power smoothly returns to zero or remains at a low reserve level. Dynamic weight adjustment: The weight coefficient α is used to allocate the fast response component, and its value (between 0 and 1) is determined by the real-time status of the boiler. For example, if the rate of pressure drop in the steam drum exceeds 0.1 MPa / min, it indicates that the boiler's energy storage is released quickly, so a larger α (such as 0.7) is set to allow the flywheel to undertake more and longer regulation tasks to protect the boiler; otherwise, a smaller α (such as 0.4) is used.

[0033] Furthermore, the AGC three-stage coordinated control method, in response to the grid AGC command \(ΔP_{AGC}\), divides the control process into three stages: Stage 1: Fast response period (0–10 seconds). The DCS commands the flywheel energy storage system to handle 100% of the initial power change within a second, i.e., \(P_{flywheel}^ =ΔP_{AGC}\). During this stage, the thermal power unit maintains its original output, avoiding severe disturbances to the boiler caused by sudden load changes. Second stage: Coordinated ramp-up period (10–60 seconds). The DCS activates the real-time output increment prediction model, combining current boiler steam temperature, pressure, and other parameters to calculate the maximum safe load change rate (r_{max}\) allowed for the thermal power unit under the current operating conditions. Subsequently, the thermal power unit is controlled to ramp up to the new target load point at a rate not exceeding (r_{max}\) (target close to 7MW / min). Simultaneously, the flywheel output command is dynamically adjusted as follows: \[P_{flywheel}^ (t)=ΔP_{AGC}\int_{10}^{t}r_{thermal}(\tau)d\tau\] The flywheel compensates in real time for the difference between the ramp-up output of the thermal power unit and the total demand, ensuring that the total output of the combined system (P_{total}) tracks the AGC commands with high precision and speed. The third stage: steady-state fine-tuning and SOC recovery period (after 60 seconds). This stage begins when the output of the thermal power unit approaches the target value and the total output deviation enters a small range (e.g., ±500kW). At this time, fine-tuning is mainly performed by the flywheel's small-power units (e.g., 500kW modules) to eliminate steady-state deviation. Simultaneously, the DCS, based on the flywheel's SOC level, embeds small-amplitude charge / discharge commands in the gaps between AGC commands or in reverse commands, so that the flywheel's net charge / discharge within the daily cycle approaches zero, maintaining its SOC within a healthy range (e.g., 40%~60%), preparing for subsequent frequency regulation requirements.

[0034] Furthermore, the safety and lifespan protection mechanisms include: Boiler safety protection: When the main steam pressure or temperature exceeds the first-level alarm value, the safety constraint loop automatically reduces the upper limit of the load change rate (r_{max}\) of the thermal power unit to a "safe mode" (e.g., 3MW / min) and immediately increases the flywheel compensation power to ensure that the overall regulation rate does not decrease significantly. Flywheel SOC protection and lifespan optimization: When the flywheel SOC is below 25%, the DCS automatically switches to "thermal power-dominated mode." In this mode, the flywheel is only used to cope with high-frequency, small-amplitude disturbances, and most AGC commands are handled by the thermal power unit to avoid flywheel over-discharge. Simultaneously, by controlling the average daily number and depth of flywheel actions, its lifespan is effectively extended. Seamless switching and manual intervention: All automatic coordination control logic is equipped with an "engage / disengage" switch and can achieve seamless switching with the unit's original basic control system (CCS). Operators can switch back to the traditional independent control mode of the thermal power unit with a single click as needed.

[0035] In one embodiment of the invention, the system hardware deployment is as follows: On the DCS engineering station of the thermal power unit, using its programmable function block (FunctionBlock) environment, the "coordinated power allocation module" software is developed and deployed. The controller of the flywheel energy storage system opens a ModbusTCP server interface and configures the communication points with the DCS (including power setpoints, actual power, SOC status, etc.). The actual power of the flywheel is collected using the idle analog input channels of the existing RTUs in the power plant, and the received AGC commands (4-20mA signals) are forwarded to the analog input cards of the DCS using its analog output channels. Alternatively, digital commands can be forwarded through the RTU using a communication method (such as the IEC104 protocol).

[0036] Further, control parameter tuning and debugging: A primary frequency regulation joint test was conducted: simulating a 0.1Hz drop in grid frequency, it was verified whether the flywheel delivered 5MW of power within 1 second, and whether the thermal power unit began to smoothly increase output after 5 seconds. An AGC step response test was conducted: a +10MW AGC command was issued to verify whether the total output response time was less than 10 seconds, and whether the main steam pressure fluctuation was less than 0.5MPa throughout the ramp-up process. Safety constraint thresholds were set: based on boiler design and operation procedures, the upper limit of main steam pressure was set to 17.5MPa, and the upper limit of main steam temperature was set to 545℃ as thresholds for triggering the safety mode. After implementing this coordinated optimization control system, the combined AGC regulation rate of the joint system increased from the original 5.5MW / min to over 7.2MW / min. The rapid response indicators of primary frequency regulation (such as the Kp value) improved by more than 25%. During frequent frequency regulation, the maximum fluctuation of the boiler main steam pressure was controlled within ±0.45MPa, and the main steam temperature fluctuation was less than ±4.2℃, which is significantly better than the operating conditions when the thermal power unit is simply regulated. Because the flywheel energy storage system mainly handles fast, small-amplitude power components, its daily high-power charge-discharge cycle count is reduced by about 30%, which helps to extend the equipment life.

[0037] The embodiments of this invention also have the following technical advantages: Low cost and easy implementation: No investment is required in constructing an expensive plant-level EMS system and complex networks. Only a software upgrade of the existing DCS and communication with the flywheel controller are needed, making full use of existing RTU equipment. The transformation cycle is short, and the return on investment is high. Significant performance improvement: Through the collaborative strategy of millisecond-level priority response of the flywheel and smooth connection of the thermal power unit, the primary frequency regulation response time of the combined system is shortened to less than 5 seconds, and the AGC regulation rate is increased by more than 30%, easily meeting the stringent frequency regulation performance requirements in the newly promulgated "two detailed rules" of the Northwest Power Grid and other regulations. Safe and reliable operation: By embedding key boiler operating parameters as core constraints into the control logic, the optimal balance between frequency regulation performance and unit safety is achieved, effectively avoiding the risk of boiler overheating and overpressure caused by rapid frequency regulation, and improving the reliability of unit operation and equipment lifespan. Optimized energy storage lifespan: Through intelligent SOC management and a three-stage control strategy, excessive use and deep charging and discharging of the flywheel are avoided, significantly reducing its number of operations and wear, and improving the full life-cycle economy of the energy storage system. High versatility: The architecture proposed in this invention does not depend on a specific model of DCS or RTU. It is applicable to the flexible transformation and frequency regulation capability improvement of a large number of thermal power units of various capacities in China that are only equipped with RTU and do not have independent EMS. It has broad application value.

[0038] To achieve the above embodiments, such as Figure 2 As shown, this embodiment also provides a thermal power flywheel energy storage coordinated optimization control device 10, including: The joint frequency regulation demand analysis module 100 is used to detect the grid frequency deviation signal or receive the grid automatic generation control command to determine the total frequency regulation power demand of the joint system. The flywheel short-time power support module 200 is used to control the flywheel energy storage system to undertake all or most of the total frequency regulation power demand during the initial period after the frequency disturbance occurs, so as to achieve millisecond-level power support. The unit collaborative power replacement module 300 is used to dynamically adjust the load change rate of the thermal power unit according to the real-time status of the key boiler parameters after the initial period ends, control the thermal power unit to gradually replace the power change undertaken by the flywheel energy storage system, and at the same time compensate for the difference between the actual output of the thermal power unit and the total frequency regulation power demand in real time. The steady-state deviation fine-tuning and energy storage balancing module 400 is used to control the flywheel energy storage system to make fine adjustments to eliminate steady-state deviation when the output of the thermal power unit is close to the target value and the total output deviation enters the preset range. It also embeds charging and discharging commands according to the state of charge of the flywheel energy storage system to maintain its state of charge within a healthy range.

[0039] The thermal power flywheel energy storage coordinated optimization control device of this invention can significantly improve the primary frequency regulation response speed and AGC regulation rate of the thermal power unit and flywheel energy storage combined system, while effectively suppressing the fluctuation of boiler main steam pressure and temperature, and ensuring the safe operation of the unit.

[0040] To implement the methods of the above embodiments, the present invention also provides a computer device, such as... Figure 3 As shown, the computer device 600 includes a memory 601 and a processor 602; wherein, the processor 602 reads executable program code stored in the memory 601 to run a program corresponding to the executable program code, so as to implement the various steps of the method described above.

[0041] To implement the above embodiments, this application also proposes a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method described in the foregoing embodiments.

[0042] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0043] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for coordinated and optimized control of thermal power flywheel energy storage, characterized in that, include: S1 detects grid frequency deviation signals or receives grid automatic generation control commands to determine the total frequency regulation power demand of the joint system. S2, In the initial period after the frequency disturbance occurs, the flywheel energy storage system is controlled to undertake all or most of the total frequency regulation power demand, achieving millisecond-level power support; S3, after the initial period ends, dynamically adjust the load change rate of the thermal power unit according to the real-time status of the key boiler parameters, control the thermal power unit to gradually take over the power change borne by the flywheel energy storage system, and at the same time compensate the difference between the actual output of the thermal power unit and the total frequency regulation power demand in real time. S4, when the output of the thermal power unit is close to the target value and the total output deviation enters the preset range, the control flywheel energy storage system is finely adjusted to eliminate the steady-state deviation, and charging and discharging commands are embedded according to the state of charge of the flywheel energy storage system to maintain its state of charge within the healthy range.

2. The method as described in claim 1, characterized in that, S1 includes: When the absolute value of the grid frequency deviation is detected to be greater than or equal to the preset dead zone, the total frequency regulation power demand is calculated based on the unit's predetermined primary frequency regulation difference rate. Receive automatic generation control commands issued by the power grid dispatch center and determine the total frequency regulation power demand of the joint system.

3. The method as described in claim 1, characterized in that, S2 includes: Within the first 5 seconds after a frequency disturbance occurs, the flywheel energy storage system undertakes all or most of the total frequency regulation power demand, achieving millisecond-level power support.

4. The method as described in claim 1, characterized in that, The S3 includes: The real-time output increment prediction model is activated, and the maximum safe load change rate of the thermal power unit under the current operating conditions is calculated by combining the current boiler steam temperature and pressure parameters. The thermal power unit is then controlled to climb to the new target load point at a rate not greater than the maximum safe load change rate. The weighting coefficients are dynamically adjusted based on the real-time status of the boiler's key parameters. These weighting coefficients are used to allocate the rapid response component undertaken by the flywheel energy storage system.

5. The method as described in claim 1, characterized in that, The method further includes: Based on the formula: Calculate the real-time target output command of the flywheel energy storage system, where The total frequency regulation power demand corresponding to the automatic generation control command of the power grid. For thermal power units at time The actual ramp rate enables the flywheel energy storage system to compensate for the difference between the ramp output of the thermal power unit and the total demand in real time.

6. The method as described in claim 1, characterized in that, The S4 includes: When the output of the thermal power unit is close to the target value and the total output deviation is within ±500kW, the small power unit of the flywheel energy storage system will make fine adjustments to eliminate the steady-state deviation. Small-amplitude charge and discharge commands are embedded in the intervals or reverse commands of automatic generation control commands, so that the net charge and discharge of the flywheel energy storage system is close to zero in the daily cycle, maintaining its state of charge within a healthy range of 40% to 60%.

7. The method as described in claim 1, characterized in that, Also includes: When the key parameters of the boiler exceed the preset safety threshold, the variable load rate setting value of the thermal power unit is forcibly reduced, and the distribution weight of the flywheel energy storage system output is dynamically increased to use the flywheel energy storage system for buffering to ensure boiler safety.

8. A coordinated and optimized control device for thermal power flywheel energy storage, characterized in that, include: The joint frequency regulation demand analysis module is used to detect grid frequency deviation signals or receive grid automatic generation control commands to determine the total frequency regulation power demand of the joint system. The flywheel short-time power support module is used to control the flywheel energy storage system to undertake all or most of the total frequency regulation power demand during the initial period after a frequency disturbance occurs, thereby achieving millisecond-level power support. The unit collaborative power takeover module is used to dynamically adjust the load change rate of the thermal power unit according to the real-time status of the key boiler parameters after the initial period ends, control the thermal power unit to gradually take over the power change undertaken by the flywheel energy storage system, and at the same time compensate for the difference between the actual output of the thermal power unit and the total frequency regulation power demand in real time. The steady-state deviation fine-tuning and energy storage balancing module is used to control the flywheel energy storage system to make fine adjustments to eliminate steady-state deviation when the output of the thermal power unit is close to the target value and the total output deviation enters the preset range. It also embeds charging and discharging commands according to the state of charge of the flywheel energy storage system to maintain its state of charge within a healthy range.

9. A computer device, characterized in that, Including processor and memory; The processor reads executable program code stored in the memory to run a program corresponding to the executable program code, so as to implement the method as described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-7.

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