Thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method and system

Abstract

The invention provides a thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method and system, the method is applied to a thermal power generating unit, the thermal power generating unit at least comprises a steam turbine and a boiler, and the method comprises the following steps: determining selection criteria of a static power model and a steam turbine dynamic coupling static pressure model through climbing test data accumulation; acquiring power grid frequency information of the thermal power generating unit; and based on the power grid frequency information and the selection criterion, calling the static power model or the steam turbine dynamic coupling static pressure model to carry out adaptability test on the AGC regulation process of the thermal power generating unit to obtain a test result. According to the invention, reasonable balance among calculation fineness, accuracy, simulation complexity and simulation speed can be effectively realized in the process of carrying out adaptability test on the AGC regulation process of the thermal power generating unit.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power generation units, and in particular to a method and system for testing the adaptability of a thermal power AGC regulation dynamic multi-frequency difference model library. Background Art

[0002] In power grid operation, AGC (Automatic Generation Control) power optimization is a key link to ensure stable operation of the power grid and improve power dispatching efficiency. This optimization process is based on a comprehensive understanding and mastery of the AGC dynamic characteristics of all generators, especially thermal power units. The dynamic response of thermal power units is a complex multivariable coupled nonlinear system with significant large hysteresis characteristics. This complexity makes it extremely challenging to finely model the thermal process in power grid simulation. Excessive refinement may lead to the "dimensionality disaster", that is, as the complexity of the system model increases, the amount of calculation increases sharply, making simulation impractical.

[0003] From the unit side, accurately evaluating and mastering its own AGC capabilities is crucial for thermal power units to participate in frequency regulation auxiliary services, day-ahead power markets, and real-time spot market trading decisions. It can provide units with a scientific basis for participating in market bidding, optimize operating strategies, and thus improve economic benefits.

[0004] It is known from the relevant technology that there are several main methods in the industry for the evaluation and simulation of AGC regulation capability. The first method allocates the regulation capability of the generator set according to its installed capacity, but this method ignores the dynamic characteristics and constraints in the actual operation of the unit, so the accuracy is limited. The second method is based on the external characteristic AGC capability reported by the unit as the input data for optimization. Although the actual capability of the unit is taken into account, the data reported by the unit may be subjective and uncertain, affecting the accuracy of the evaluation. The third method uses the BPA power grid dynamic simulation model. Through simulation, the power dynamic characteristics in the AGC process can be obtained in more detail, providing a more reliable basis for optimization. However, this method also faces the problems of high simulation complexity, large amount of calculation, and slow simulation speed. These problems are particularly prominent in large-scale power grid simulation.

[0005] Therefore, finding a method for adaptability testing of the dynamic multi-frequency difference model library for thermal power AGC regulation that strikes a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed is a technical problem that needs to be solved urgently. Summary of the invention

[0006] The present invention provides a method and system for adaptability testing of a dynamic multi-frequency difference model library for AGC regulation of thermal power plants, which can effectively achieve a reasonable balance between calculation precision, accuracy, simulation complexity and simulation speed during adaptability testing of the AGC regulation process of a thermal power unit.

[0007] The present invention provides a method for testing the adaptability of a dynamic multi-frequency difference model library for AGC regulation of thermal power generation. The method is applied to a thermal power generation unit, wherein the thermal power generation unit at least includes a steam turbine and a boiler. The method comprises: determining the selection criteria of a static power model and a steam turbine dynamic coupling static pressure model through accumulation of ramp test data, wherein the static power model ignores the regulation dynamics of the power deviation in a CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the power response of the unit under a large frequency disturbance; acquiring the grid frequency information of the thermal power generation unit; and based on the grid frequency information and the selection criteria, calling the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power generation unit to obtain a test result.

[0008] According to the adaptability test method of the dynamic multi-frequency difference model library for AGC regulation of thermal power provided by the present invention, the selection criterion is to call the static power model when the grid frequency does not change significantly, and to call the steam turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step-like manner; based on the grid frequency information and the selection criterion, the static power model or the steam turbine dynamic coupling static pressure model is called to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test result, specifically including: when it is determined based on the grid frequency information that the grid frequency of the thermal power unit does not change significantly, based on the selection criterion, the static power model is called to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test result.

[0009] According to the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention, the method also includes: when it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, calling the steam turbine dynamic coupling static pressure model to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain a test result.

[0010] According to the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation provided by the present invention, the selection criteria of the static power model and the dynamic coupling static pressure model of the steam turbine are determined by accumulating climbing test data, which specifically includes: testing the independent related factors affecting the main steam pressure and power fluctuations of the thermal power unit through the accumulation of climbing test data; when the independent related factors affecting the main steam pressure and power fluctuations of the thermal power unit are determined, the selection criteria of the static power model and the dynamic coupling static pressure model of the steam turbine are determined through data fitting.

[0011] The present invention also provides a thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system, the system is applied to a thermal power unit, the thermal power unit at least includes a steam turbine and a boiler, the system includes: a determination module, used to determine the selection criteria of a static power model and a steam turbine dynamic coupling static pressure model through the accumulation of climbing test data; an acquisition module, used to obtain the grid frequency information of the thermal power unit; a test module, used to call the static power model or the steam turbine dynamic coupling static pressure model based on the grid frequency information and the selection criteria to perform adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0012] According to the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention, the selection criterion is to call the static power model when the grid frequency does not undergo a significant jump, and to call the steam turbine dynamic coupling static pressure model when the grid frequency deviation undergoes a step change; the test module adopts the following method to implement adaptability testing of the AGC regulation process of the thermal power unit based on the grid frequency information and the selection criterion, and obtain the test result by calling the static power model or the steam turbine dynamic coupling static pressure model: when it is determined based on the grid frequency information that the grid frequency of the thermal power unit does not undergo a significant jump, based on the selection criterion, the static power model is called to perform adaptability testing of the AGC regulation process of the thermal power unit to obtain the test result.

[0013] According to the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention, the test module is also used for: when it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, calling the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test result.

[0014] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the adaptability testing method for the dynamic multi-frequency difference model library of thermal power AGC regulation as described in any one of the above methods is implemented.

[0015] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for testing the adaptability of a dynamic multi-frequency difference model library for AGC regulation of thermal power plants as described in any one of the above is implemented.

[0016] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-mentioned methods for testing the adaptability of a thermal power AGC regulation dynamic multi-frequency difference model library.

[0017] The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method and system provided by the present invention are applied to thermal power units, which at least include steam turbines and boilers. The method includes: determining the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model through the accumulation of ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbance; obtain the power grid frequency information of the thermal power unit; based on the power grid frequency information and the selection criteria, call the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test results. It is achieved that in the process of performing adaptability test on the AGC regulation process of the thermal power unit, a reasonable balance can be effectively achieved between calculation precision, accuracy, simulation complexity and simulation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a flow chart of the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention.

[0020] Figure 2The present invention provides a flow chart for testing the adaptability of the AGC regulation process of a thermal power unit based on grid frequency information and selection criteria by calling a static power model or a turbine dynamic coupling static pressure model to obtain test results.

[0021] Figure 3 It is a schematic diagram of the application of the static power model provided by the present invention.

[0022] Figure 4 It is a schematic diagram of the application of the CCS steam turbine master control in the steam turbine dynamic coupled static pressure model provided by the present invention.

[0023] Figure 5 It is a schematic diagram of the application of the steam turbine model in the steam turbine dynamic coupling static pressure model provided by the present invention.

[0024] Figure 6 It is an application schematic diagram of the static pressure model in the steam turbine dynamic coupled static pressure model provided by the present invention.

[0025] Figure 7 It is a structural schematic diagram of a thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention.

[0026] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The adaptability test method of the dynamic multi-frequency difference model library for thermal power AGC regulation provided by the present invention can be applied to thermal power units. In the application process, the degree of change of the main steam pressure can be used as a standard for whether the boiler model is ignored; the main steam flow and power fluctuation degree can be used as a standard for whether the steam turbine master control and steam turbine dynamics are ignored. Based on this, the static power model and the steam turbine dynamic coupling static pressure model are extracted. In the application process, based on the grid frequency information and selection criteria, the static power model or the steam turbine dynamic coupling static pressure model is called to perform adaptability test on the AGC regulation process of the thermal power unit, and the test results are obtained, which can effectively achieve a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed.

[0029] It is known from the related art that the model that can be used for AGC dynamic simulation includes the main factors that affect the power response of thermal power units. However, in different research scenarios, the main factors should be retained and the secondary factors should be ignored to achieve model simplification. In the adaptability test method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention, different simplified models are obtained based on reasonable assumptions, such as a static power model and a steam turbine dynamic coupling static pressure model, and their applicable scenarios. In the corresponding adaptation scenario, the simplified static power model or the steam turbine dynamic coupling static pressure model is called, which can achieve a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed.

[0030] Figure 1 It is a flow chart of the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention.

[0031] The following will be combined Figure 1 The process of the adaptability testing method of the thermal power AGC regulation dynamic multi-frequency difference model library provided by the present invention is described.

[0032] In an exemplary embodiment of the present invention, the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method can be applied to a thermal power unit. The thermal power unit may include at least a steam turbine and a boiler. Figure 1 It can be seen that the adaptability test method of the thermal power AGC regulation dynamic multi-frequency difference model library can include steps 110 to 130, and each step will be introduced below.

[0033] In step 110, the selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined by accumulating ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS turbine main control; the turbine dynamic coupling static pressure model considers the dynamic change process of the turbine and the boiler, so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbances.

[0034] In one embodiment, the selection criteria of the static power model and the dynamic coupled static pressure model of the steam turbine can be determined in advance by accumulating ramp test data. Among them, the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine master control. The dynamic coupled static pressure model of the steam turbine takes into account the dynamic change process of the steam turbine and the boiler, so that the dynamic coupled static pressure model of the steam turbine can reflect the power response of the unit under large frequency disturbances. Among them, when the frequency disturbance is greater than the preset frequency disturbance, it can be called a large frequency disturbance.

[0035] In step 120, the grid frequency information of the thermal power unit is obtained.

[0036] In step 130, based on the grid frequency information and the selection criteria, a static power model or a turbine dynamic coupling static pressure model is retrieved to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0037] In one embodiment, the grid frequency information of the thermal power generation unit may be obtained. In the application process, based on the grid frequency information of the thermal power generation unit, it may be determined whether the actual operation scenario of the thermal power generation unit is a scenario where the power command changes slowly or quickly.

[0038] In another embodiment, the corresponding static power model or the steam turbine dynamic coupling static pressure model can be retrieved based on the grid frequency information and the selection criteria to perform adaptability test on the AGC regulation process of the thermal power unit, thereby obtaining the test result. In this embodiment, the static power model or the steam turbine dynamic coupling static pressure model corresponding to the grid frequency information is used to perform adaptability test on the AGC regulation process of the thermal power unit, which can achieve a reasonable balance between calculation precision, accuracy, simulation complexity, and simulation speed.

[0039] The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method provided by the present invention is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method includes: determining the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model through the accumulation of ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbance; obtains the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, the static power model or the steam turbine dynamic coupling static pressure model is retrieved to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test results. It is achieved that in the process of performing adaptability test on the AGC regulation process of the thermal power unit, a reasonable balance can be effectively achieved between calculation precision, accuracy, simulation complexity and simulation speed.

[0040] Figure 2 The present invention provides a flow chart for testing the adaptability of the AGC regulation process of a thermal power unit based on grid frequency information and selection criteria by calling a static power model or a turbine dynamic coupling static pressure model to obtain test results.

[0041] The following will be combined Figure 2 The process of adapting the AGC regulation process of the thermal power unit by calling the static power model or the steam turbine dynamic coupling static pressure model based on the grid frequency information and selection criteria and obtaining the test results is explained.

[0042] In an exemplary embodiment of the present invention, the selection criteria are to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step-like manner; wherein, the grid frequency does not change significantly means that the degree of grid frequency change is less than or equal to the preset degree of change, and the preset degree of change can be adjusted according to actual conditions, and is not specifically limited in this embodiment. Figure 2 It can be seen that based on the grid frequency information and the selection criteria, the static power model or the turbine dynamic coupling static pressure model is called to perform adaptability testing on the AGC regulation process of the thermal power unit to obtain the test results, which may include step 210 and step 220. Each step will be introduced below.

[0043] In step 210, when it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not changed significantly, based on the selection criteria, the static power model is called to perform adaptability test on the AGC adjustment process of the thermal power unit to obtain the test result.

[0044] In one embodiment, when it is detected that the grid frequency of the thermal power unit has not changed significantly, in other words, when it is detected that the power command of the thermal power unit changes slowly, the static power model can be called based on the selection criteria to perform adaptability test on the AGC adjustment process of the thermal power unit to obtain the test result. In this embodiment, by calling the static power model that matches the current grid frequency information to perform adaptability test on the AGC adjustment process of the thermal power unit, it is achieved that in the process of performing adaptability test on the AGC adjustment process of the thermal power unit, a reasonable balance can be effectively achieved between calculation precision, accuracy, simulation complexity, and simulation speed.

[0045] In another embodiment, the static power model ignores the dynamic adjustment of the power deviation in the CCS steam turbine master control. In the static power model, the unit power given by the CCS steam turbine master control is used as the output, wherein, under the CCS steam turbine master control, the input is the automatic power generation control instruction P AGC , frequency deviation Δf And the unit power setting P E , the output is the main steam valve comprehensive valve position instruction c v .

[0046] In one embodiment, when the thermal power unit uses the main steam valve to respond to a frequency modulation, the energy that can be released is mainly restricted by the boiler heat storage, and the energy release rate is mainly restricted by the steam turbine master control. Assuming that the boiler heat storage is sufficient and the frequency change rate is not large, the dynamics of the steam turbine master control and the steam turbine can be ignored. In other words, the actual power of the unit is not much different from the command power at this time. In the AGC response, the power change of the thermal power unit per minute basically does not exceed 1% of the rated power, and it is relatively easy to maintain the energy balance inside the boiler. In addition to the buffering of the boiler heat storage, the unit can also better follow the given power in the steam turbine master control. Therefore, the adjustment dynamics of the power deviation in the CCS steam turbine master control can be ignored, and the input unit power setting is used as the output to obtain a static power model, and the corresponding static power model is called to simulate and detect the thermal power unit.

[0047] In the application process, CCS steam turbine master control (such as Figure 4 The input of the AGC instruction is shown in P AGC , frequency deviation Δf and actual power of the unit P E , the output is the main steam valve comprehensive valve position instruction c v It should be noted that the CCS mentioned above stands for Coordinated Control System (CCS for short).

[0048] In CCS steam turbine master control (such as Figure 4 The specific signal flow during operation is as follows: AGC instruction superimposes the frequency modulation power setting to obtain the total power setting of the unit; the total power setting of the unit and the actual power deviation of the unit (which can be calculated based on P E The main steam valve comprehensive valve position base value is superimposed on the frequency deviation feedforward (which can be obtained according to Δf Get) to get the main steam valve comprehensive valve position command. Among them, Figure 4 K f and K r Represents parameter coefficients.

[0049] Figure 3 It is a schematic diagram of the application of the static power model provided by the present invention.

[0050] Combination Figure 3 It can be seen that on the basis of the CCS steam turbine master control, the adjustment dynamics of the power deviation in the CCS steam turbine master control can be ignored, and the input unit power given as the output can be obtained to obtain the static power model.

[0051] It is understandable that the static power model ignores the dynamic process of the thermal power unit and does not include output variables other than the unit power. Therefore, this model can only be used as an external characteristic model of the slow process. In the study of multi-area AGC, if the focus is on system frequency fluctuations, boiler heat storage is often not the focus of research; and due to the existence of inertia, the system frequency generally does not jump significantly, so this model is suitable for multi-area AGC research. This model is more in line with the actual direct current boiler unit. In the process of simulation testing, the influence of power feedback and AGC command speed limit is fully considered.

[0052] In step 220, when it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain the test results.

[0053] In one embodiment, when a step-like change in the grid frequency deviation of a thermal power unit is detected, in other words, when a relatively fast change in the power command of the thermal power unit is detected, the dynamic coupled static pressure model of the steam turbine can be called based on the selection criteria to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain the test result. In this embodiment, by calling the dynamic coupled static pressure model of the steam turbine that matches the current grid frequency information to perform an adaptability test on the AGC regulation process of the thermal power unit, a reasonable balance can be effectively achieved between the calculation precision, accuracy, simulation complexity, and simulation speed in the process of performing the adaptability test on the AGC regulation process of the thermal power unit.

[0054] In another embodiment, the turbine dynamic coupling static pressure model takes into account the dynamic changes of the turbine and the boiler, so that the turbine dynamic coupling static pressure model can reflect the power response of the unit under large frequency disturbances.

[0055] In another embodiment, if the grid frequency changes in a step-like manner, the dynamic process of the unit needs to be considered. The unit dynamics may include the dynamics of the steam turbine and the boiler. However, under the assumption that the boiler has sufficient heat storage, it can be assumed that the change in the unit main steam pressure is not large, making the dynamics of the steam turbine the dominant factor in the unit power. In this case, the complete CCS steam turbine master control (such as Figure 4 ) and the turbine model (as shown Figure 5 As shown in Figure 2), the boiler dynamics can be replaced by a static pressure model. The steam turbine model can be the IEEE standard steam turbine model. Figure 4 It is a schematic diagram of the application of the CCS steam turbine master control in the steam turbine dynamic coupled static pressure model provided by the present invention. Figure 5Schematic diagram of the application of the steam turbine model in the steam turbine dynamic coupling static pressure model provided by the present invention. It should be noted that: Figure 5 An IEEE standard steam turbine model is shown. Figure 5 To elaborate.

[0056] It should be noted that, if the adjustment process after PID in the boiler master control is ignored and only the main steam pressure setting value is considered, a static pressure model can be obtained. Its input is the AGC power instruction P AGC , the output is the boiler main steam pressure P st It is understandable that the static model is not the real boiler main control, but an idealization of the actual main steam pressure control.

[0057] In the application process, the input of CCS boiler master control can be AGC power instruction P AGC Measuring main steam pressure with boiler P st , the output is the coal feeding instruction B , water supply instruction D fw .

[0058] The specific signal flow in the operation of CCS boiler master control is as follows: AGC command is converted by F(x) to obtain the main steam pressure setting value under the corresponding working condition; after the main steam pressure deviation is input into the PID regulator, the power command feedforward is superimposed to obtain the boiler master control command; the boiler master control command is converted into the coal supply command base value, and the coal supply command base value is superimposed on the variable load feedforward to obtain the coal supply command, and the water supply command can be obtained in the same way. Among them, the given main steam pressure, that is, F(x), needs to be obtained according to the sliding pressure curve formulated by the unit; PID parameters are adaptive to different working conditions.

[0059] Figure 6 It is an application schematic diagram of the static pressure model in the steam turbine dynamic coupled static pressure model provided by the present invention.

[0060] Combination Figure 6 It can be seen that based on the CCS boiler master control model, the adjustment process after PID in the boiler master control can be ignored, and only the main steam pressure setting value is considered, then the static pressure model can be obtained as follows: Figure 6 Its input is the AGC power command P AGC , the output is the boiler main steam pressure P st .

[0061] It should be noted that the dynamic coupled static pressure model of the steam turbine introduces the physical and control dynamics of the steam turbine on the basis of the static power model, so that it can reflect the power response of the unit under large disturbances. Therefore, this model is suitable for multi-region AGC research focusing on frequency safety, system frequency response (System Frequency Response, also known as SFR) research, and fire-storage combined secondary frequency regulation research. The former two basically ignore the influence of main steam pressure in existing research, while the focus of fire-storage combination is to give full play to the rapidity of energy storage, and the main steam pressure can also be assumed to be stable. Therefore, the above scenarios all meet the application scenarios of the dynamic coupled static pressure model of the steam turbine. Among them, the dynamic coupled static pressure model of the steam turbine takes into account the influence of sliding pressure operation, command speed limit and power feedback during the application process.

[0062] In another exemplary embodiment of the present invention, the above-mentioned embodiment is continued to be used as an example for explanation. By accumulating ramp test data, determining the selection criteria of the static power model and the turbine dynamic coupling static pressure model may include the following steps: Through the accumulation of ramp test data, the independent related factors affecting the main steam pressure and power fluctuation of thermal power units are tested; After the independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are determined, the selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined by data fitting.

[0063] In one embodiment, independent related factors affecting main steam pressure and power fluctuations can be tested by accumulating ramp test data, and selection criteria for the two models can be determined by data fitting. The selection criteria determined by this embodiment can lay a foundation for adaptability testing of the AGC regulation process of the thermal power unit by calling the corresponding static power model or the steam turbine dynamic coupling static pressure model based on the selection criteria and grid frequency information.

[0064] According to the foregoing description, the adaptability test method of the dynamic multi-frequency difference model library for thermal power AGC regulation provided by the present invention is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The method includes: determining the selection criteria of the static power model and the dynamic coupling static pressure model of the steam turbine through the accumulation of ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the dynamic coupling static pressure model of the steam turbine considers the dynamic change process of the steam turbine and the boiler, so that the dynamic coupling static pressure model of the steam turbine can reflect the power response of the unit under large frequency disturbances; obtaining the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, calling the static power model or the dynamic coupling static pressure model of the steam turbine to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test results. It is achieved that in the process of adaptability test of the AGC regulation process of the thermal power unit, a reasonable balance between calculation precision, accuracy, simulation complexity and simulation speed can be effectively achieved.

[0065] The adaptability testing system for the dynamic multi-frequency difference model library of the thermal power AGC regulation provided by the present invention is described below. The adaptability testing system for the dynamic multi-frequency difference model library of the thermal power AGC regulation described below and the adaptability testing method for the dynamic multi-frequency difference model library of the thermal power AGC regulation described above can be referred to each other.

[0066] Figure 7 It is a structural schematic diagram of a thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention.

[0067] The following will be combined Figure 3 The structure of the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system provided by the present invention is described.

[0068] In an exemplary embodiment of the present invention, a thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system can be applied to a thermal power unit, which includes at least a steam turbine and a boiler. The system may include a determination module 710, an acquisition module 720, and a test module 730. Each module will be introduced below.

[0069] The determination module 710 may be configured to determine the selection criteria of the static power model and the turbine dynamic coupling static pressure model through the accumulation of ramp test data; The acquisition module 720 may be configured to acquire the grid frequency information of the thermal power generation unit; The test module 730 may be configured to retrieve the static power model or the turbine dynamic coupled static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit based on the grid frequency information and the selection criterion to obtain a test result.

[0070] In an exemplary embodiment of the present invention, the selection criterion is to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step-like manner; The test module 730 can use the following method to implement adaptability testing of the AGC regulation process of the thermal power unit based on the grid frequency information and the selection criterion, and retrieve the static power model or the turbine dynamic coupling static pressure model to obtain the test result: When it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not changed significantly, based on the selection criterion, the static power model is called to perform adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0071] In an exemplary embodiment of the present invention, the testing module 730 may also be configured to: When it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0072] In an exemplary embodiment of the present invention, the determination module 710 may determine the selection criteria of the static power model and the turbine dynamic coupled static pressure model by accumulating ramp test data in the following manner: By accumulating ramp test data, independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are tested; When the independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are determined, the selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined by data fitting.

[0073] Figure 8 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 8As shown, the electronic device may include: a processor (processor) 810, a communication interface (Communications Interface) 820, a memory (memory) 830 and a communication bus 840, wherein the processor 810, the communication interface 820, and the memory 830 communicate with each other through the communication bus 840. The processor 810 can call the logic instructions in the memory 830 to execute the adaptability test method of the dynamic multi-frequency difference model library of the thermal power AGC regulation. The method is applied to a thermal power unit, and the thermal power unit includes at least a steam turbine and a boiler. The method includes: determining the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model through the accumulation of climbing test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbance; obtains the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, calls the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test result.

[0074] In addition, the logic instructions in the above-mentioned memory 830 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0075] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the adaptability test method of the dynamic multi-frequency difference model library for thermal power AGC regulation provided by the above methods. The method is applied to a thermal power unit, which at least includes a steam turbine and a boiler. The method includes: determining the selection criteria of a static power model and a steam turbine dynamic coupling static pressure model through accumulation of ramp test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbance; obtains the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, calls the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

[0076] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the processor executes the thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method provided by the above methods, the method is applied to a thermal power unit, the thermal power unit at least includes a steam turbine and a boiler, the method includes: determining the selection criteria of the static power model and the steam turbine dynamic coupling static pressure model through the accumulation of climbing test data, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS steam turbine main control; the steam turbine dynamic coupling static pressure model considers the dynamic change process of the steam turbine and the boiler, so that the steam turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbance; obtains the grid frequency information of the thermal power unit; based on the grid frequency information and the selection criteria, calls the static power model or the steam turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test result.

[0077] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0078] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method, characterized in that: The method is applied to a thermal power unit, which at least includes a steam turbine and a boiler, and comprises: By accumulating ramp test data, the selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined, wherein the static power model ignores the adjustment dynamics of the power deviation in the CCS turbine main control; the turbine dynamic coupling static pressure model considers the dynamic change process of the turbine and the boiler, so that the turbine dynamic coupling static pressure model can reflect the unit power response under large frequency disturbance; Obtaining power grid frequency information of the thermal power unit; Based on the grid frequency information and the selection criterion, the static power model or the turbine dynamic coupling static pressure model is retrieved to perform adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

2. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method according to claim 1 is characterized in that: The selection criteria are to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step-like manner; Based on the grid frequency information and the selection criterion, calling the static power model or the turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit to obtain the test result specifically includes: When it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not changed significantly, based on the selection criterion, the static power model is retrieved to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

3. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test method according to claim 2 is characterized in that: The method further comprises: When it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

4. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability testing method according to any one of claims 1 to 3, characterized in that: The selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined by accumulating ramp test data, specifically including: By accumulating ramp test data, independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are tested; When the independent related factors affecting the main steam pressure and power fluctuation of the thermal power unit are determined, the selection criteria of the static power model and the turbine dynamic coupling static pressure model are determined by data fitting.

5. A thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system, characterized in that: The system is applied to a thermal power unit, which includes at least a steam turbine and a boiler. The system includes: A determination module is used to determine the selection criteria of the static power model and the turbine dynamic coupling static pressure model through the accumulation of ramp test data; An acquisition module, used to acquire the power grid frequency information of the thermal power unit; The test module is used to call the static power model or the turbine dynamic coupling static pressure model to perform adaptability test on the AGC regulation process of the thermal power unit based on the grid frequency information and the selection criterion to obtain the test result.

6. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system according to claim 5 is characterized in that: The selection criteria are to call the static power model when the grid frequency does not change significantly, and to call the turbine dynamic coupling static pressure model when the grid frequency deviation changes in a step-like manner; The test module uses the following method to implement adaptability testing of the AGC regulation process of the thermal power unit based on the grid frequency information and the selection criterion, and to obtain the test result by calling the static power model or the turbine dynamic coupling static pressure model: When it is determined based on the grid frequency information that the grid frequency of the thermal power unit has not changed significantly, based on the selection criterion, the static power model is retrieved to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

7. The thermal power AGC regulation dynamic multi-frequency difference model library adaptability test system according to claim 6 is characterized in that: The test module is also used to: When it is determined based on the grid frequency information that the grid frequency deviation of the thermal power unit has a step change, based on the selection criterion, the steam turbine dynamic coupling static pressure model is called to perform an adaptability test on the AGC regulation process of the thermal power unit to obtain a test result.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the adaptability testing method for the thermal power AGC regulation dynamic multi-frequency difference model library as described in any one of claims 1 to 4 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the adaptability testing method for the thermal power AGC regulation dynamic multi-frequency difference model library as described in any one of claims 1 to 4 is implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the adaptability testing method for the thermal power AGC regulation dynamic multi-frequency difference model library as described in any one of claims 1 to 4 is implemented.

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