CN118157158A - Frequency modulation method and system for fused salt coupling thermal power generating unit based on input correction - Google Patents
Frequency modulation method and system for fused salt coupling thermal power generating unit based on input correction Download PDFInfo
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- 238000012937 correction Methods 0.000 title claims abstract description 80
- 150000003839 salts Chemical class 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000008878 coupling Effects 0.000 title description 9
- 238000010168 coupling process Methods 0.000 title description 9
- 238000005859 coupling reaction Methods 0.000 title description 9
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 35
- 238000001914 filtration Methods 0.000 claims description 19
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000012549 training Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/002—Flicker reduction, e.g. compensation of flicker introduced by non-linear load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The invention discloses a frequency modulation method and a frequency modulation system of a fused salt coupled thermal power generating unit based on input correction, wherein the method comprises the steps of obtaining an input initial frequency modulation instruction and determining a correction coefficient corresponding to the initial frequency modulation instruction; correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction; the method comprises the steps of obtaining a decomposition layer number, inputting a target frequency modulation instruction and the decomposition layer number into a trained prediction model, and obtaining a first aliasing degree value corresponding to the decomposition layer number; and based on the first aliasing degree value, obtaining a high-frequency power component and a low-frequency power component, sending the high-frequency power component to the molten salt as a molten salt frequency modulation power instruction, and sending the low-frequency power component to the thermal power unit as a thermal power unit frequency modulation power instruction. Therefore, the target frequency modulation instruction is obtained by correcting the initial frequency modulation instruction, so that the predicted aliasing degree value is more accurate, the frequency modulation effect is optimized, and the application economy of the energy storage control system is improved.
Description
Technical Field
The invention relates to the technical field of power grid frequency modulation, in particular to a frequency modulation method and system of a fused salt coupling thermal power generating unit based on input correction.
Background
At present, the fire-storage combined frequency modulation can obviously improve the frequency modulation performance of the thermal power generating unit, so that the shortage of the frequency modulation capacity of the system can be quickly and effectively reduced. The fused salt energy storage takes nitrate and other raw materials as a heat storage medium, can store and release energy through the conversion of heat energy of a heat transfer working medium and the internal energy of fused salt, has the advantages of low cost, high safety, large capacity, long service life and the like, and is applied to fire-storage combined frequency modulation.
In the prior art, the frequency modulation command can be divided into a high-frequency component and a low-frequency component based on the aliasing degree value of the frequency modulation command, so that the hybrid energy storage power distribution is performed. However, the aliasing degree value predicted based on the frequency modulation instruction may have an error, and based on the aliasing degree value, the frequency modulation effect is not ideal, and the running economy is poor.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent.
Therefore, the invention provides the frequency modulation method of the fused salt coupling thermal power generating unit based on input correction, and the target frequency modulation instruction can be obtained by correcting the initial frequency modulation instruction, so that the predicted aliasing degree value is more accurate, the frequency modulation effect is optimized, and the application economy of the energy storage control system is improved.
The invention further aims at providing a frequency modulation system of the fused salt coupling thermal power generating unit based on input correction.
In order to achieve the above purpose, the invention provides a frequency modulation method of a fused salt coupled thermal power generating unit based on input correction, which comprises the following steps:
Acquiring an input initial frequency modulation instruction, and determining a correction coefficient corresponding to the initial frequency modulation instruction;
correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction;
The number of decomposition layers is obtained, the target frequency modulation instruction and the number of decomposition layers are input into a trained prediction model, and a first aliasing degree value corresponding to the number of decomposition layers is obtained;
And based on the first aliasing degree value, obtaining a high-frequency power component and a low-frequency power component, sending the high-frequency power component to molten salt as a molten salt frequency modulation power instruction, and sending the low-frequency power component to a thermal power unit as the thermal power unit frequency modulation power instruction.
The frequency modulation method of the fused salt coupling thermal power generating unit based on input correction provided by the embodiment of the invention can also have the following additional technical characteristics:
in one embodiment of the present invention, the determining the correction coefficient corresponding to the initial frequency modulation command includes:
determining a target moment corresponding to the initial frequency modulation instruction;
based on the target time, acquiring predicted data and actual data of N times before the target time;
Determining a correction coefficient of each of the N moments based on the predicted data and the actual data of the N moments;
and determining the correction coefficient corresponding to the initial frequency modulation instruction based on the correction coefficient of each of the N moments.
In one embodiment of the present invention, the correcting the initial tuning instruction based on the correction coefficient to obtain a target tuning instruction includes: and correcting the initial frequency modulation instruction by multiplying the correction coefficient by the initial frequency modulation instruction to obtain a target frequency modulation instruction.
In one embodiment of the present invention, the first aliasing degree value D is expressed as: where k1 is the number of modal amounts, (i+1)max is the frequency at which the i+1th modal amount is the largest, (i)min is the frequency at which the i-th modal amount is the smallest, and (i+1)-(1) is the frequency value at which the i+1th modal amount and the i-th modal amount overlap.
In one embodiment of the present invention, the obtaining a high frequency power component and a low frequency power component based on the first aliasing degree value includes:
Determining a second aliasing degree value between adjacent modal amounts according to the first aliasing degree value, and taking a smaller filtering order x in the adjacent modal amount corresponding to the lowest second aliasing degree value as a dividing line;
Determining the sum of the modal amounts of which the filtering order is less than or equal to x as a high-frequency power component;
The sum of the residual component and the modal quantity with the filtering order greater than x is determined as the low frequency power component.
In order to achieve the above object, another aspect of the present invention provides a frequency modulation system of a fused salt coupled thermal power generating unit based on input correction, the system comprising:
the acquisition module is used for acquiring an input initial frequency modulation instruction and determining a correction coefficient corresponding to the initial frequency modulation instruction;
The correction module is used for correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction;
The prediction module is used for obtaining the number of decomposition layers, inputting the target frequency modulation instruction and the number of decomposition layers into a trained prediction model, and obtaining a first aliasing degree value corresponding to the number of decomposition layers;
and the sending module is used for obtaining a high-frequency power component and a low-frequency power component based on the first aliasing degree value, sending the high-frequency power component to molten salt to serve as a molten salt frequency modulation power instruction, and sending the low-frequency power component to a thermal power unit to serve as the thermal power unit frequency modulation power instruction.
In one embodiment of the present invention, the obtaining module is specifically configured to:
determining a target moment corresponding to the initial frequency modulation instruction;
based on the target time, acquiring predicted data and actual data of N times before the target time;
Determining a correction coefficient of each of the N moments based on the predicted data and the actual data of the N moments;
and determining the correction coefficient corresponding to the initial frequency modulation instruction based on the correction coefficient of each of the N moments.
In one embodiment of the present invention, the sending module is specifically configured to:
Determining a second aliasing degree value between adjacent modal amounts according to the first aliasing degree value, and taking a smaller filtering order j in the adjacent modal amount corresponding to the lowest second aliasing degree value as a dividing line;
determining the sum of the mode quantities with the filtering order less than or equal to j as a high-frequency power component;
the sum of the mode amounts and the residual components with the filtering order larger than j is determined as the low-frequency power component.
Another object of the present invention is to propose an electronic device comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of the preceding aspects.
Another object of the present invention is to provide a computer storage medium, wherein the computer storage medium stores computer executable instructions; the computer-executable instructions, when executed by a processor, cause a computer to perform the method of any of the preceding aspects.
According to the frequency modulation method and system for the fused salt coupling thermal power generating unit based on input correction, the target frequency modulation instruction can be obtained by correcting the initial frequency modulation instruction, so that the predicted aliasing degree value is more accurate, the frequency modulation effect is optimized, and the application economy of an energy storage control system is improved.
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.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
FIG. 1 is a flow chart of a frequency modulation method of a fused salt coupled thermal power plant based on input correction according to an embodiment of the invention;
FIG. 2 is a schematic illustration of a thermal power plant connected to a power grid according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of frequency modulation of a fused salt coupled thermal power plant based on input correction in accordance with an embodiment of the present invention;
fig. 4 is a block diagram of a frequency modulation system of a fused salt coupled thermal power generating unit based on input correction according to an embodiment of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The frequency modulation method and the frequency modulation system of the fused salt coupling thermal power generating unit based on input correction provided by the embodiment of the invention are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a frequency modulation method of a fused salt coupled thermal power generating unit based on input correction according to an embodiment of the invention.
As shown in fig. 1, the method includes:
S1, acquiring an input initial frequency modulation instruction, and determining a correction coefficient corresponding to the initial frequency modulation instruction;
In one embodiment of the present invention, after the power plant obtains the input initial tuning command P T, the initial tuning command may be transmitted to the energy storage control system, so that the energy storage control system performs tuning based on the initial tuning command.
In one embodiment of the present invention, after the initial tuning instruction is acquired, a correction coefficient corresponding to the initial tuning instruction may be determined, so as to correct the initial tuning instruction.
Specifically, in one embodiment of the present invention, the method for determining the correction coefficient corresponding to the initial frequency modulation command may include the following steps:
step S11, determining a target moment corresponding to the initial frequency modulation instruction;
step S12, based on the target time, acquiring predicted data and actual data of N times before the target time;
step S13, determining a correction coefficient of each of N moments based on the predicted data and the actual data of the N moments;
Step S14, based on the correction coefficient of each of the N moments, determining the correction coefficient corresponding to the initial frequency modulation instruction.
In one embodiment of the present invention, N is a positive integer, and the target time is a time when the initial frequency modulation command is acquired, where N times and the target time form a plurality of consecutive times. And, in the embodiment of the present disclosure, the time interval of the connection time may be a time interval of acquiring the initial frequency modulation instruction.
By way of example, in one embodiment of the present invention, assuming that the target time is t, the predicted data and the actual data at N times before the target time t are acquired, that is, the predicted data and the actual data at times t-1, t-2.
In an embodiment of the present invention, the predicted data may be a predicted aliasing degree corresponding to each time, and the predicted fm command corresponding to each time may be obtained according to the predicted aliasing degree. And, in one embodiment of the present invention, the correction factor for each instant may be determined by the ratio of the actual to predicted instructions for each instant. For example, assuming that X 1 (t-1) is the actual FM instruction at time t-1 and X 2 (t-1) is the predicted FM instruction at time t-1, the correction factor at time t-1
In one embodiment of the present invention, after the correction coefficient of each of the N times is obtained, an average value of the correction coefficients of the N times may be determined as the correction coefficient corresponding to the initial frequency modulation command.
For example, assuming that the correction coefficients for time t-1, t-2, and t-N are t-1,t-2,...,t-N, respectively, the correction coefficients corresponding to the initial frequency modulation command are those for the first time
S2, correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction;
In one embodiment of the present invention, a method for correcting an initial tuning instruction based on a correction coefficient to obtain a target tuning instruction may include: and correcting the initial frequency modulation instruction by multiplying the correction coefficient with the initial frequency modulation instruction to obtain the target frequency modulation instruction.
For example, assuming that X (t) is an initial tuning instruction at time t and t is a correction coefficient, the target tuning instruction X' (t) =x (t) × t.
S3, obtaining the number of decomposition layers, and inputting the target frequency modulation instruction and the number of decomposition layers into a trained prediction model to obtain a first aliasing degree value corresponding to the number of decomposition layers;
In one embodiment of the present invention, before inputting the target tuning instruction and the decomposition level number into the trained predictive model, the method may further include: and obtaining training data, and training the prediction model to be trained by using the training data to obtain a trained prediction model.
Wherein, in one embodiment of the present invention, the input of the prediction model to be trained is a frequency modulation instruction and the number of decomposition layers, and the output of the prediction model to be trained is a first aliasing degree value. And in one embodiment of the present invention, the VMD algorithm decomposes the fm signal into M mode quantities (IMFs) by decomposing the layer number M and maps the M mode quantities to the frequency domain, and may determine a sum of aliasing degree values between adjacent mode quantities among the M mode quantities as a first aliasing degree value corresponding to the decomposition layer number M and the fm signal.
Illustratively, in one embodiment of the invention, the VMD algorithm decomposes the FM signal into 9 modal amounts: IMF1, IMF2, IMF3, IMF4, IMF5, IMF6, IMF7, IMF8, IMF9, and mapping the 9 modal amounts to the frequency domain, wherein the frequency length of the aliasing between IMF1 and IMF 2/the frequency length of the IMF1 and IMF2 subsequences yields an aliasing degree value for IMF1 and IMF 2.
And, in one embodiment of the present invention, the first aliasing degree value D may be expressed asWhere k1 is the number of mode amounts (IMFs), (i+1)max is the frequency at which the i+1th mode amount is the largest, (i)min is the frequency at which the i-th mode amount is the smallest, and (i+1)-(1) is the frequency value at which the i+1th mode amount and the i-th mode amount overlap.
Further, in an embodiment of the present invention, the prediction model may be any one of a GRU and a BP. And, the training data may be set as needed, for example, the training data may be more than or equal to 20000.
And, in an embodiment of the present invention, the number of decomposition layers may be a set number of decomposition layers, for example, the number of decomposition layers may be 4.
Further, in one embodiment of the present invention, table 1 shows the results of decomposing the fm instruction by the prediction method and the conventional prediction method according to the present invention, and predicting the first aliasing degree value D.
TABLE 1
In one embodiment of the present invention, as shown in table 1, the average prediction error of the algorithm proposed by the present invention is 8.4, and the average prediction error of the conventional model is 14.94, so that the prediction accuracy of the first aliasing degree value is greatly improved by the algorithm proposed by the present invention.
In one embodiment of the invention, the frequency modulated instructions may be resolved by the VMD algorithmWherein P T is the total power required to be compensated by the frequency modulation instruction, c i (t) is the ith mode quantity (IMF) after decomposition, the number of mode quantities is the number of decomposition layers K, and r K (t) is the residual component after decomposition.
S4, obtaining a high-frequency power component and a low-frequency power component based on the first aliasing degree value, sending the high-frequency power component to molten salt to serve as a molten salt frequency modulation power instruction, and sending the low-frequency power component to the thermal power unit to serve as a thermal power unit frequency modulation power instruction.
In one embodiment of the invention, after the first aliasing degree value is obtained through the steps, high-frequency and low-frequency reconstruction can be performed on the IMF according to the characteristics of stabilizing power fluctuation of the molten salt and the thermal power generating unit so as to determine a high-frequency power component and a low-frequency power component.
Specifically, in one embodiment of the present invention, a method of obtaining a high frequency power component and a low frequency power component based on a first aliasing degree value may include the steps of:
step S41, determining a second aliasing degree value between adjacent modal amounts according to the first aliasing degree value, and taking a smaller filtering order x in the adjacent modal amount corresponding to the lowest second aliasing degree value as a dividing line;
step S42, determining the sum of the modal amounts with the filtering order less than or equal to x as a high-frequency power component;
step S43, determining the sum of the modal quantity and the residual component with the filtering order larger than x as the low-frequency power component.
Wherein in one embodiment of the invention the second aliasing degree value = the frequency length of aliasing between adjacent modal amounts/the frequency length of adjacent modal quantum sequences.
For example, assuming that the number of modal amounts is 6, that is, IMF 1、IMF2、IMF3、IMF4、IMF5、IMF6 is included, where the second aliasing degree values corresponding to IMF 3 and IMF 4 are the lowest, the smaller filtering order 3 in IMF 3 and IMF 4 is taken as the dividing line.
And in one embodiment of the invention, after the high-frequency power component and the low-frequency power component are obtained, the high-frequency power component can be sent to the molten salt to serve as a molten salt frequency modulation power instruction P C, and the low-frequency power component can be sent to the thermal power unit to serve as a thermal power unit frequency modulation power instruction P L. Wherein,
In one embodiment of the present invention, fig. 2 is a schematic diagram of connection between a thermal power plant and a power grid according to an embodiment of the present invention. As shown in fig. 2, the electric machine group G is connected to a power grid via a bus, and a molten salt energy storage device (may be simply referred to as molten salt) is connected to the bus via a PCS (Power Conversion System, energy storage converter) and then incorporated into the power grid. The molten salt energy storage device comprises a molten salt tank, a thermoelectric direct conversion system and a molten salt heater, wherein the molten salt heater is used for converting electric energy from a power grid into heat energy to be stored in the molten salt tank, and the thermoelectric direct conversion system is used for converting the heat energy released by the molten salt tank into electric energy to be transmitted to the power grid. When the power grid issues the frequency modulation command, the frequency modulation command carries a power grid frequency modulation response requirement PT, and after the thermal power plant receives the frequency modulation command, the fused salt frequency modulation power command P C and the thermal power unit frequency modulation power command P L can be determined through the method to respond. The molten salt frequency modulation power instruction P C can be discharged/charged through a thermoelectric direct conversion system and a molten salt heater.
In one embodiment of the invention, an input initial frequency modulation instruction is obtained, and a correction coefficient corresponding to the initial frequency modulation instruction is determined; correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction; the method comprises the steps of obtaining a decomposition layer number, inputting a target frequency modulation instruction and the decomposition layer number into a trained prediction model, and obtaining a first aliasing degree value corresponding to the decomposition layer number; and based on the first aliasing degree value, obtaining a high-frequency power component and a low-frequency power component, sending the high-frequency power component to the molten salt as a molten salt frequency modulation power instruction, and sending the low-frequency power component to the thermal power unit as a thermal power unit frequency modulation power instruction. Therefore, the target frequency modulation instruction can be obtained by correcting the initial frequency modulation instruction, so that the predicted aliasing degree value is more accurate, the frequency modulation effect is optimized, and the application economy of the energy storage control system is improved.
Based on the above, the frequency modulation method of the fused salt coupled thermal power generating unit based on the input correction in the embodiment is exemplified.
Fig. 3 is a schematic flow chart of a frequency modulation method of a fused salt coupled thermal power generating unit based on input correction in an embodiment of the disclosure, where the flow chart includes: acquiring an initial frequency modulation instruction X (t) at the moment t; obtaining a predicted frequency modulation instruction X 2 (t-1) corresponding to the moment according to the predicted aliasing degree D (t-1) 1 before the moment t, determining a correction coefficient t-1 of the moment according to the ratio of the actual frequency modulation instruction X 1 (t-1) to the predicted frequency modulation instruction X 2 (t-1), repeating the steps to obtain 300 moments t-1,...t-300 before the moment t, and obtaining the correction coefficientObtaining a target frequency modulation instruction X' (t) at the time t after correction through the correction coefficient; inputting the target frequency modulation instruction and the decomposition layer number into a trained prediction model to obtain a first aliasing degree D (t) corresponding to the decomposition layer number; and based on the first aliasing degree value, obtaining a high-frequency power component and a low-frequency power component, sending the high-frequency power component to the molten salt as a molten salt frequency modulation power instruction, and sending the low-frequency power component to the thermal power unit as a thermal power unit frequency modulation power instruction.
In order to implement the above embodiment, as shown in fig. 4, there is further provided a frequency modulation system 10 of a fused salt coupled thermal power generating unit based on input modification, where the system includes an obtaining module 401, a modifying module 402, a predicting module 403, and a transmitting module 404;
The acquiring module 401 is configured to acquire an input initial frequency modulation instruction, and determine a correction coefficient corresponding to the initial frequency modulation instruction;
The correction module 402 is configured to correct the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction;
The prediction module 403 is configured to obtain a decomposition layer number, input a target frequency modulation instruction and the decomposition layer number into a trained prediction model, and obtain a first aliasing degree corresponding to the decomposition layer number;
The sending module 304 is configured to obtain a high-frequency power component and a low-frequency power component based on the first aliasing degree value, send the high-frequency power component to the molten salt as a molten salt frequency modulation power instruction, and send the low-frequency power component to the thermal power unit as a thermal power unit frequency modulation power instruction.
Further, the above-mentioned acquisition module is specifically configured to:
determining a target moment corresponding to the initial frequency modulation instruction;
Based on the target time, acquiring predicted data and actual data of N times before the target time;
determining a correction coefficient of each of the N moments based on the predicted data and the actual data of the N moments;
and determining the correction coefficient corresponding to the initial frequency modulation instruction based on the correction coefficient of each of the N moments.
Further, the correction module is specifically configured to: and correcting the initial frequency modulation instruction by multiplying the correction coefficient with the initial frequency modulation instruction to obtain the target frequency modulation instruction.
Further, the first aliasing degree value D is expressed as: where k1 is the number of modal amounts, (i+1)max is the frequency at which the i+1th modal amount is the largest, (i)min is the frequency at which the i-th modal amount is the smallest, and (i+1)-(1) is the frequency value at which the i+1th modal amount and the i-th modal amount overlap.
Further, the above-mentioned sending module is specifically configured to:
Determining a second aliasing degree value between adjacent modal amounts according to the first aliasing degree value, and taking a smaller filtering order j in the adjacent modal amount corresponding to the lowest second aliasing degree value as a dividing line;
determining the sum of the mode quantities with the filtering order less than or equal to j as a high-frequency power component;
the sum of the mode amounts and the residual components with the filtering order larger than j is determined as the low-frequency power component.
According to the frequency modulation system of the fused salt coupling thermal power generating unit based on input correction, disclosed by the embodiment of the invention, the target frequency modulation instruction can be obtained by correcting the initial frequency modulation instruction, so that the predicted aliasing degree value is more accurate, the frequency modulation effect is optimized, and the application economy of the energy storage control system is improved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Claims (10)
1. A frequency modulation method of a fused salt coupled thermal power generating unit based on input correction, the method comprising:
Acquiring an input initial frequency modulation instruction, and determining a correction coefficient corresponding to the initial frequency modulation instruction;
correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction;
The number of decomposition layers is obtained, the target frequency modulation instruction and the number of decomposition layers are input into a trained prediction model, and a first aliasing degree value corresponding to the number of decomposition layers is obtained;
And based on the first aliasing degree value, obtaining a high-frequency power component and a low-frequency power component, sending the high-frequency power component to molten salt as a molten salt frequency modulation power instruction, and sending the low-frequency power component to a thermal power unit as the thermal power unit frequency modulation power instruction.
2. The method of claim 1, wherein determining the correction factor corresponding to the initial frequency modulation command comprises:
determining a target moment corresponding to the initial frequency modulation instruction;
based on the target time, acquiring predicted data and actual data of N times before the target time;
Determining a correction coefficient of each of the N moments based on the predicted data and the actual data of the N moments;
and determining the correction coefficient corresponding to the initial frequency modulation instruction based on the correction coefficient of each of the N moments.
3. The method of claim 1, wherein said modifying the initial tuning instruction based on the modification factor to obtain a target tuning instruction comprises: and correcting the initial frequency modulation instruction by multiplying the correction coefficient by the initial frequency modulation instruction to obtain a target frequency modulation instruction.
4. The method according to claim 1, wherein the first aliasing degree value D is expressed as: where k1 is the number of modal amounts, (i+1)max is the frequency at which the i+1th modal amount is the largest, (i)min is the frequency at which the i-th modal amount is the smallest, and (i+1)-(1) is the frequency value at which the i+1th modal amount and the i-th modal amount overlap.
5. The method of claim 1, wherein the deriving the high frequency power component and the low frequency power component based on the first aliasing degree value comprises:
Determining a second aliasing degree value between adjacent modal amounts according to the first aliasing degree value, and taking a smaller filtering order x in the adjacent modal amount corresponding to the lowest second aliasing degree value as a dividing line;
Determining the sum of the modal amounts of which the filtering order is less than or equal to x as a high-frequency power component;
The sum of the residual component and the modal quantity with the filtering order greater than x is determined as the low frequency power component.
6. A frequency modulation system of a fused salt coupled thermal power generating unit based on input correction, the system comprising:
the acquisition module is used for acquiring an input initial frequency modulation instruction and determining a correction coefficient corresponding to the initial frequency modulation instruction;
The correction module is used for correcting the initial frequency modulation instruction based on the correction coefficient to obtain a target frequency modulation instruction;
The prediction module is used for obtaining the number of decomposition layers, inputting the target frequency modulation instruction and the number of decomposition layers into a trained prediction model, and obtaining a first aliasing degree value corresponding to the number of decomposition layers;
and the sending module is used for obtaining a high-frequency power component and a low-frequency power component based on the first aliasing degree value, sending the high-frequency power component to molten salt to serve as a molten salt frequency modulation power instruction, and sending the low-frequency power component to a thermal power unit to serve as the thermal power unit frequency modulation power instruction.
7. The system according to claim 6, wherein the acquisition module is specifically configured to:
determining a target moment corresponding to the initial frequency modulation instruction;
based on the target time, acquiring predicted data and actual data of N times before the target time;
Determining a correction coefficient of each of the N moments based on the predicted data and the actual data of the N moments;
and determining the correction coefficient corresponding to the initial frequency modulation instruction based on the correction coefficient of each of the N moments.
8. The system according to claim 6, wherein the sending module is specifically configured to:
Determining a second aliasing degree value between adjacent modal amounts according to the first aliasing degree value, and taking a smaller filtering order j in the adjacent modal amount corresponding to the lowest second aliasing degree value as a dividing line;
determining the sum of the mode quantities with the filtering order less than or equal to j as a high-frequency power component;
the sum of the mode amounts and the residual components with the filtering order larger than j is determined as the low-frequency power component.
9. An electronic device, comprising:
At least one processor; and
A memory communicatively coupled to the at least one processor; wherein,
The memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-5.
10. A computer storage medium, wherein the computer storage medium stores computer-executable instructions; the computer executable instructions, when executed by a processor, are capable of implementing the method of any of claims 1-5.
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