Unit frequency modulation control method and device based on power grid frequency trend prediction

Abstract

The invention provides a unit frequency modulation control method and device based on power grid frequency trend prediction, and relates to the technical field of control. The method comprises the following steps: acquiring a power grid frequency trend prediction value within a preset duration by taking a current moment as a time starting point; if it is determined that a plurality of first target continuous power grid frequency predicted values which are all larger than a dead zone and exceed a first preset number exist in the power grid frequency trend predicted values, starting frequency modulation of a condensation water system, and outputting frequency modulation output of the condensation water system; if it is determined that the actual frequency of the power grid exceeds the dead zone at the current moment, total frequency modulation output is obtained, and unit frequency modulation control is conducted according to the difference value between the total frequency modulation output and the frequency modulation output of the condensation water system. The device executes the method. According to the unit frequency modulation control method and device based on power grid frequency trend prediction provided by the embodiment of the invention, the qualified rate of frequency modulation can be ensured by starting the condensation water system for frequency modulation in advance.

Description

Technical Field

[0001] The present invention relates to the field of control technology, and in particular to a method and device for frequency regulation control of a unit based on power grid frequency trend prediction. Background Art

[0002] With the acceleration of the construction of new power systems, the frequency fluctuations of the power grid are becoming more and more severe. Frequency stability is one of the most critical requirements for the operation of new power systems in the future. Coal-fired thermal power units are the most core and reliable primary frequency regulation resources. However, the traditional method of throttling frequency regulation through coal-fired thermal power regulation gates has begun to show a trend of insufficient primary frequency regulation capacity, especially for thermal power units involved in deep peak regulation. Due to the reduction of heat storage, the primary frequency regulation capacity of the unit itself is further reduced. In order to meet the current and long-term development needs, it is necessary to find a method to assist thermal power units in frequency regulation.

[0003] At present, the auxiliary frequency regulation methods are mainly divided into two categories. One is to perform auxiliary frequency regulation by tapping the heat storage of the unit itself, such as condensate throttling regulation, exhaust heat regulation, and supplementary steam regulation; the other is to perform auxiliary frequency regulation by building a new energy storage device. These two methods have their own advantages and disadvantages. For example, condensate throttling frequency regulation often has a long response time. Depending on the different types of units or different operating conditions of the same type of units, the response time is generally 10S-20S. Exhaust heat regulation and energy storage device frequency regulation often require the unit to be modified, increasing related costs; supplementary steam frequency regulation is prone to cause large vibration of the steam turbine. Summary of the invention

[0004] In view of the problems in the prior art, an embodiment of the present invention provides a method and device for unit frequency regulation control based on power grid frequency trend prediction, which can at least partially solve the problems in the prior art.

[0005] On the one hand, the present invention proposes a unit frequency regulation control method based on power grid frequency trend prediction, comprising:

[0006] Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0007] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0008] If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output;

[0009] If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0010] The step of obtaining the power grid frequency trend forecast value within a preset time period with the current time as the time starting point includes:

[0011] Predicting the power grid frequency trend after the current moment based on a preset power grid frequency trend prediction model to obtain a power grid frequency trend prediction value within the preset time period;

[0012] The preset power grid frequency trend prediction model is obtained by training a bidirectional long short-term memory neural network based on a training set.

[0013] Wherein, starting the condensate system frequency modulation and outputting the condensate system frequency modulation output includes:

[0014] The condensate system frequency modulation is started according to the preset condensate system action logic, and the condensate system frequency modulation output is output.

[0015] Wherein, starting the condensate system frequency modulation according to the preset condensate system action logic and outputting the condensate system frequency modulation output includes:

[0016] The frequency difference between each first target continuous grid frequency prediction value and the rated frequency value is calculated respectively, and the frequency modulation output of the condensate system is output according to the maximum frequency difference.

[0017] Wherein, the unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0018] At a moment next to the current moment, respectively calculating an updated frequency difference between each first target continuous power grid frequency prediction value and a rated frequency value;

[0019] If it is determined that the maximum update frequency difference is greater than the maximum frequency difference, the frequency modulation output of the condensate system is output according to the maximum update frequency difference.

[0020] Wherein, the unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0021] If it is determined that the maximum update frequency difference is less than or equal to the maximum frequency difference, no processing action is performed.

[0022] Wherein, the unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0023] If it is determined that there are multiple second target continuous grid frequency prediction values ​​that are all less than or equal to the dead zone and exceed a second preset number, the condensate system frequency modulation is stopped; the second preset number is greater than the first preset number.

[0024] On the one hand, the present invention proposes a unit frequency regulation control device based on power grid frequency trend prediction, comprising:

[0025] An acquisition unit is used to acquire a power grid frequency trend forecast value within a preset time period with the current time as the time starting point;

[0026] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0027] A starting unit, configured to start the condensate system frequency modulation and output the condensate system frequency modulation output if it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value;

[0028] A control unit is used to obtain the total frequency modulation output if it is determined that the actual frequency of the power grid exceeds the dead zone at the current moment, and perform unit frequency modulation control according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0029] In another aspect, an embodiment of the present invention provides an electronic device, including: a processor, a memory, and a bus, wherein:

[0030] The processor and the memory communicate with each other via the bus;

[0031] The memory stores program instructions that can be executed by the processor, and the processor calls the program instructions to execute the following method:

[0032] Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0033] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0034] If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output;

[0035] If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0036] An embodiment of the present invention provides a non-transitory computer-readable storage medium, including:

[0037] The non-transitory computer-readable storage medium stores computer instructions, which cause the computer to execute the following method:

[0038] Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0039] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0040] If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output;

[0041] If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0042] The unit frequency regulation control method and device based on grid frequency trend prediction provided by the embodiment of the present invention obtain the grid frequency trend prediction value within a preset time length with the current moment as the time starting point; wherein the grid frequency trend prediction value is a plurality of continuous grid frequency prediction values, and the time interval between each two adjacent grid frequency prediction values ​​is a fixed time length; if it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate water system frequency regulation is started, and the condensate water system frequency regulation output is output; if it is determined at the current moment that the actual frequency of the grid exceeds the dead zone, the total frequency regulation output is obtained, and the unit frequency regulation control is performed according to the difference between the total frequency regulation output and the condensate water system frequency regulation output, and the qualified rate of the frequency regulation can be guaranteed by starting the condensate water system frequency regulation in advance. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0044] Figure 1It is a flow chart of a method for frequency regulation control of a unit based on grid frequency trend prediction provided by an embodiment of the present invention.

[0045] Figure 2 It is a flow chart of a method for frequency regulation control of a unit based on grid frequency trend prediction provided by another embodiment of the present invention.

[0046] Figure 3 It is a schematic diagram for explaining the comparison between the actual frequency and the predicted frequency provided by an embodiment of the present invention.

[0047] Figure 4 It is a schematic diagram for explaining the logic of frequency modulation power borne by the condensate water system provided in an embodiment of the present invention.

[0048] Figure 5 It is a schematic diagram for explaining the functions of the SEL selection block provided in an embodiment of the present invention.

[0049] Figure 6 It is a structural schematic diagram of a unit frequency regulation control device based on power grid frequency trend prediction provided by one embodiment of the present invention.

[0050] Figure 7 A schematic diagram of the physical structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention more clear, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily.

[0052] Figure 1 FIG. 1 is a flow chart of a method for controlling unit frequency regulation based on power grid frequency trend prediction provided by an embodiment of the present invention. Figure 1 As shown, the unit frequency regulation control method based on power grid frequency trend prediction provided by the embodiment of the present invention includes:

[0053] Step S1: Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0054] The power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length.

[0055] Step S2: If it is determined that there are multiple first target continuous grid frequency prediction values ​​that are greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started and the condensate system frequency modulation output is output.

[0056] Step S3: If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0057] In the above step S1, the device obtains the power grid frequency trend forecast value within a preset time period with the current time as the time starting point;

[0058] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between each two adjacent power grid frequency prediction values ​​is a fixed duration. The device may be a computer device for executing the method. It should be noted that the acquisition and analysis of data involved in the embodiment of the present invention is authorized by the user. The preset duration can be set independently according to the actual situation, and can be selected as 10S. The fixed duration can be set independently according to the actual situation, and can be selected as 1S.

[0059] The step of obtaining a power grid frequency trend forecast value within a preset time period with the current time as the time starting point includes:

[0060] Based on the preset power grid frequency trend prediction model, the power grid frequency trend after the current moment is predicted to obtain the power grid frequency trend prediction value within the preset time length; the actual frequency of the power grid at the current moment can be input into the preset power grid frequency trend prediction model, and the output result of the preset power grid frequency trend prediction model is used as the power grid frequency trend prediction value within the preset time length.

[0061] The preset power grid frequency trend prediction model is obtained by training a bidirectional long short-term memory neural network based on a training set. Figure 2 As shown, the frequency data in the historical data set can be divided into two categories according to high frequency and low frequency, and form a training set, where high frequency refers to frequency data greater than 50HZ+0.033HZ, and low frequency refers to frequency data less than 50HZ-0.033HZ.

[0062] Bidirectional long short-term memory neural network, namely BiLSTM algorithm, initializes BiLSTM algorithm parameters, which may include but are not limited to initializing weights and biases, setting learning rates and optimizers, selecting activation functions and loss functions, etc.

[0063] Since the response time of the throttling regulation of the condensate system is different at different load points of the thermal power unit itself, generally, when the unit load is higher, the response time of the condensate system is shorter, and when the unit load is lower, the response time of the condensate system is longer, but the response time is generally between 10S-20S.

[0064] After a frequency modulation action, the assessment index needs to meet the following three indicators: 15S reaches 75% of the theoretical extreme value adjustment amount; 30S reaches 90% of the theoretical extreme value adjustment amount; the integrated power reaches 75% of the theoretical frequency modulation amount. According to actual data statistics, the 15S assessment index is the most important. Generally, the pass rate of the 15S assessment index directly determines the overall pass rate. Therefore, the present invention will be designed with the primary goal of improving the 15S pass rate of the unit. Therefore, the preset duration is selected as 10S and the fixed duration is selected as 1S.

[0065] In the above step S2, if the device determines that there are multiple first target continuous grid frequency prediction values ​​that are greater than the dead zone and exceed the first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started and the condensate system frequency modulation output is output. Referring to the above description of high frequency and low frequency, the dead zone refers to the numerical interval of the frequency value greater than 50.033HZ, or the numerical interval of the frequency value less than 49.967HZ.

[0066] The first preset number can be set independently according to the actual situation, and can be selected as 5. Figure 3 As shown, in order to avoid frequent operation of the condensate throttling control system, it is preset here that when 5 values ​​among the predicted continuous frequency values ​​exceed the dead zone, it is considered that there is a high probability of triggering the effective frequency regulation assessment record, that is, the condensate frequency regulation action is triggered at this time.

[0067] The starting of the condensate system frequency modulation and output of the condensate system frequency modulation output comprises:

[0068] The condensate system frequency modulation is started according to the preset condensate system action logic, and the condensate system frequency modulation output is output.

[0069] The method of starting the condensate system frequency modulation according to the preset condensate system action logic and outputting the condensate system frequency modulation output includes:

[0070] The frequency difference between each first target continuous grid frequency prediction value and the rated frequency value is calculated respectively, and the frequency modulation output of the condensate system is output according to the maximum frequency difference. The rated frequency value is 50HZ. Generally, if the maximum frequency difference is larger, the frequency modulation output of the condensate system is also larger; if the maximum frequency difference is smaller, the frequency modulation output of the condensate system is also smaller, which can meet the linear relationship.

[0071] The unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0072] At the next moment after the current moment, the update frequency difference between each first target continuous grid frequency prediction value and the rated frequency value is calculated respectively; an example is given below:

[0073] The first target continuous power grid frequency prediction value corresponding to the current time t1 includes a power grid frequency prediction value y2 corresponding to t2, a power grid frequency prediction value y3 corresponding to t3, ..., a power grid frequency prediction value y11 corresponding to t11;

[0074] The first target continuous grid frequency prediction value corresponding to the next moment t2 of the current moment includes the grid frequency prediction value y3 corresponding to t3, the grid frequency prediction value y4 corresponding to t4... and the grid frequency prediction value y12 corresponding to t12; compared with the previous moment, the change of the first target continuous grid frequency prediction value is a decrease of y2 and an increase of y12; accordingly, the change of the updated frequency difference is a decrease of the frequency difference c2 corresponding to y2 and an increase of the frequency difference c12 corresponding to y12.

[0075] If it is determined that the maximum update frequency difference is greater than the maximum frequency difference, the condensate system frequency modulation output is output according to the maximum update frequency difference. If the maximum update frequency difference in c3-c12 is greater than the maximum frequency difference in c2-c11, for example, c12 is the maximum update frequency difference, the condensate system frequency modulation output is output according to c12.

[0076] The unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0077] If it is determined that the maximum update frequency difference is less than or equal to the maximum frequency difference, no processing action is performed. The case where the maximum update frequency difference is less than the maximum frequency difference means that c2 is the maximum frequency difference and c3 to c12 are all less than c2. No processing action is performed, which means that the frequency modulation power borne during the entire process is not allowed to move in the direction of reducing the frequency modulation power.

[0078] The unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0079] If it is determined that there are multiple second target continuous grid frequency prediction values ​​that are all less than or equal to the dead zone and exceed the second preset number, the condensate system frequency modulation is stopped; the second preset number is greater than the first preset number. The second preset number can be set independently according to actual conditions and can be selected as 6. That is, if 6 values ​​of the continuous grid predicted frequency values ​​are restored to within the dead zone, it is considered that the frequency modulation is ended.

[0080] In this way, under the delayed recovery characteristics of the condensate system, the integral power assessment of the frequency modulation can be reduced as much as possible. In addition, this method can effectively shorten the response time of the condensate throttling auxiliary frequency modulation, reduce the number of actions of the condensate system water supply regulating valve, and increase the service life of the condensate water supply regulating valve. Figure 4As shown, starting the condensate system frequency modulation can be achieved by setting the S trigger terminal of the RS trigger to 1, and stopping the condensate system frequency modulation can be achieved by setting the R reset terminal of the RS trigger to 1. The condensate system frequency modulation output can be output according to the condensate flow command.

[0081] like Figure 5 As shown, Figure 4 Functional description of the SEL selection block in.

[0082] In the above step S3, if the device determines that the actual frequency of the power grid exceeds the dead zone at the current moment, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system. The total frequency modulation output can be obtained by outputting the total frequency modulation instruction. The conventional control algorithm can be used to gradually approach zero to achieve unit frequency modulation control. When the difference is less than the preset error value, it can be considered that the difference has approached zero, and the original unit frequency modulation can be started at this time. The amount of action of the thermal power unit can be reduced, the action frequency of the unit main steam regulating valve can be reduced, and the life of the regulating valve can be extended.

[0083] The unit frequency regulation control method based on grid frequency trend prediction provided by the embodiment of the present invention predicts the grid frequency. If the predicted frequency exceeds the dead zone for a certain period of time, the condensate throttling regulation system will be started in advance. Since the thermal power unit has a fast load response, it can act according to the actual real-time value of the grid, mainly to make up for the difference between the theoretical frequency regulation action amount and the condensate system action amount.

[0084] The unit frequency regulation control method based on grid frequency trend prediction provided by an embodiment of the present invention takes the current moment as the time starting point to obtain a grid frequency trend prediction value within a preset time length; wherein the grid frequency trend prediction value is a plurality of continuous grid frequency prediction values, and the time interval between each two adjacent grid frequency prediction values ​​is a fixed time length; if it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are greater than a dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate water system frequency regulation is started, and the condensate water system frequency regulation output is output; if it is determined at the current moment that the actual grid frequency exceeds the dead zone, the total frequency regulation output is obtained, and the unit frequency regulation control is performed according to the difference between the total frequency regulation output and the condensate water system frequency regulation output, and by starting the condensate water system frequency regulation in advance, the pass rate of the frequency regulation can be guaranteed.

[0085] Furthermore, the step of obtaining a power grid frequency trend forecast value within a preset time period with the current time as the time starting point includes:

[0086] Based on the preset power grid frequency trend prediction model, the power grid frequency trend after the current moment is predicted to obtain a power grid frequency trend prediction value within the preset time period; please refer to the above embodiment for description and will not repeat them here.

[0087] The preset power grid frequency trend prediction model is obtained by training a bidirectional long short-term memory neural network according to a training set. The above-mentioned embodiment can be referred to for explanation and will not be described in detail.

[0088] Furthermore, the starting of the condensate system frequency modulation and output of the condensate system frequency modulation output includes:

[0089] According to the preset condensate system action logic, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output. The above-mentioned embodiment can be referred to for description, and no further description is given.

[0090] Furthermore, starting the condensate system frequency modulation according to the preset condensate system action logic and outputting the condensate system frequency modulation output includes:

[0091] The frequency difference between each first target continuous grid frequency prediction value and the rated frequency value is calculated respectively, and the frequency modulation output of the condensate system is output according to the maximum frequency difference. The above-mentioned embodiment can be referred to for explanation and will not be described in detail.

[0092] Furthermore, the unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0093] At the next moment after the current moment, the updated frequency difference between each first target continuous power grid frequency prediction value and the rated frequency value is calculated respectively; the description may refer to the above embodiment and will not be repeated here.

[0094] If it is determined that the maximum update frequency difference is greater than the maximum frequency difference, the frequency modulation output of the condensate system is output according to the maximum update frequency difference. The above description can be referred to in detail in the above embodiment and will not be repeated here.

[0095] Furthermore, the unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0096] If it is determined that the maximum update frequency difference is less than or equal to the maximum frequency difference, no processing action is performed. The above embodiment can be referred to for description, and no further description is given.

[0097] Furthermore, the unit frequency regulation control method based on power grid frequency trend prediction also includes:

[0098] If it is determined that there are multiple second target continuous grid frequency prediction values ​​that are all less than or equal to the dead zone and exceed a second preset number, the condensate system frequency modulation is stopped; the second preset number is greater than the first preset number. The above embodiment can be referred to for description and will not be repeated here.

[0099] Figure 6 FIG. 1 is a schematic diagram of a unit frequency regulation control device based on power grid frequency trend prediction provided by an embodiment of the present invention. Figure 6 As shown, the unit frequency regulation control device based on power grid frequency trend prediction provided by the embodiment of the present invention includes an acquisition unit 601, a start unit 602 and a control unit 603, wherein:

[0100] The acquisition unit 601 is used to acquire the grid frequency trend prediction value within a preset time period with the current moment as the time starting point; wherein the grid frequency trend prediction value is multiple continuous grid frequency prediction values, and the time interval between each two adjacent grid frequency prediction values ​​is a fixed time period; the starting unit 602 is used to start the condensate system frequency modulation and output the condensate system frequency modulation output if it is determined that there are multiple first target continuous grid frequency prediction values ​​that are greater than the dead zone and exceed the first preset number in the grid frequency trend prediction value; the control unit 603 is used to acquire the total frequency modulation output if it is determined that the actual frequency of the grid exceeds the dead zone at the current moment, and perform unit frequency modulation control according to the difference between the total frequency modulation output and the condensate system frequency modulation output.

[0101] Specifically, the acquisition unit 601 in the device is used to obtain the grid frequency trend prediction value within a preset time length with the current moment as the time starting point; wherein the grid frequency trend prediction value is multiple continuous grid frequency prediction values, and the time interval between each two adjacent grid frequency prediction values ​​is a fixed time length; the starting unit 602 is used to start the condensate system frequency modulation and output the condensate system frequency modulation output if it is determined that there are multiple first target continuous grid frequency prediction values ​​in the grid frequency trend prediction value that are greater than the dead zone and exceed the first preset number; the control unit 603 is used to obtain the total frequency modulation output if it is determined that the actual frequency of the grid exceeds the dead zone at the current moment, and perform unit frequency control according to the difference between the total frequency modulation output and the condensate system frequency modulation output.

[0102] The unit frequency regulation control device based on grid frequency trend prediction provided by an embodiment of the present invention takes the current moment as the time starting point to obtain a grid frequency trend prediction value within a preset time length; wherein the grid frequency trend prediction value is a plurality of continuous grid frequency prediction values, and the time interval between each two adjacent grid frequency prediction values ​​is a fixed time length; if it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are greater than a dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate water system frequency regulation is started, and the condensate water system frequency regulation output is output; if it is determined at the current moment that the actual grid frequency exceeds the dead zone, the total frequency regulation output is obtained, and the unit frequency regulation control is performed according to the difference between the total frequency regulation output and the condensate water system frequency regulation output, and by starting the condensate water system frequency regulation in advance, the pass rate of the frequency regulation can be guaranteed.

[0103] The embodiment of the present invention provides an embodiment of a unit frequency regulation control device based on grid frequency trend prediction, which can be specifically used to execute the processing flow of the above-mentioned method embodiments. Its functions are not repeated here, and reference can be made to the detailed description of the above-mentioned method embodiments.

[0104] Figure 7 A schematic diagram of the physical structure of an electronic device provided in an embodiment of the present invention, such as Figure 7 As shown, the electronic device includes: a processor (processor) 701, a memory (memory) 702 and a bus 703;

[0105] The processor 701 and the memory 702 communicate with each other via a bus 703;

[0106] The processor 701 is used to call the program instructions in the memory 702 to execute the methods provided by the above method embodiments, for example, including:

[0107] Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0108] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0109] If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output;

[0110] If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0111] This embodiment discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer can perform the methods provided by the above method embodiments, for example, including:

[0112] Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0113] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0114] If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output;

[0115] If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0116] This embodiment provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, wherein the computer program enables the computer to execute the methods provided by the above method embodiments, for example, including:

[0117] Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period;

[0118] Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length;

[0119] If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output;

[0120] If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

[0121] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0122] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0123] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0124] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0125] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0126] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A unit frequency regulation control method based on power grid frequency trend prediction, characterized in that: include: Taking the current time as the starting point, obtain the power grid frequency trend forecast value within a preset time period; Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length; If it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value, the condensate system frequency modulation is started, and the condensate system frequency modulation output is output; If it is determined at the current moment that the actual frequency of the power grid exceeds the dead zone, the total frequency modulation output is obtained, and the unit frequency modulation control is performed according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

2. The unit frequency regulation control method based on power grid frequency trend prediction according to claim 1 is characterized in that: The step of obtaining a power grid frequency trend forecast value within a preset time period with the current time as the time starting point includes: Predicting the power grid frequency trend after the current moment based on a preset power grid frequency trend prediction model to obtain a power grid frequency trend prediction value within the preset time period; The preset power grid frequency trend prediction model is obtained by training a bidirectional long short-term memory neural network based on a training set.

3. The unit frequency regulation control method based on power grid frequency trend prediction according to claim 1 is characterized in that: The starting of the condensate system frequency modulation and output of the condensate system frequency modulation output comprises: The condensate system frequency modulation is started according to the preset condensate system action logic, and the condensate system frequency modulation output is output.

4. The unit frequency regulation control method based on power grid frequency trend prediction according to claim 3 is characterized in that: The method of starting the condensate system frequency modulation according to the preset condensate system action logic and outputting the condensate system frequency modulation output includes: The frequency difference between each first target continuous grid frequency prediction value and the rated frequency value is calculated respectively, and the frequency modulation output of the condensate system is output according to the maximum frequency difference.

5. The unit frequency regulation control method based on power grid frequency trend prediction according to claim 4 is characterized in that: The unit frequency regulation control method based on power grid frequency trend prediction also includes: At a moment next to the current moment, respectively calculating an updated frequency difference between each first target continuous power grid frequency prediction value and a rated frequency value; If it is determined that the maximum update frequency difference is greater than the maximum frequency difference, the frequency modulation output of the condensate system is output according to the maximum update frequency difference.

6. The unit frequency regulation control method based on power grid frequency trend prediction according to claim 5 is characterized in that: The unit frequency regulation control method based on power grid frequency trend prediction also includes: If it is determined that the maximum update frequency difference is less than or equal to the maximum frequency difference, no processing action is performed.

7. The unit frequency regulation control method based on power grid frequency trend prediction according to any one of claims 1 to 6, characterized in that: The unit frequency regulation control method based on power grid frequency trend prediction also includes: If it is determined that there are multiple second target continuous grid frequency prediction values ​​that are all less than or equal to the dead zone and exceed a second preset number, the condensate system frequency modulation is stopped; the second preset number is greater than the first preset number.

8. A unit frequency regulation control device based on power grid frequency trend prediction, characterized in that: include: An acquisition unit is used to acquire a power grid frequency trend forecast value within a preset time period with the current time as the time starting point; Wherein, the power grid frequency trend prediction value is a plurality of continuous power grid frequency prediction values, and the time interval between every two adjacent power grid frequency prediction values ​​is a fixed time length; A starting unit, configured to start the condensate system frequency modulation and output the condensate system frequency modulation output if it is determined that there are a plurality of first target continuous grid frequency prediction values ​​that are all greater than the dead zone and exceed a first preset number in the grid frequency trend prediction value; A control unit is used to obtain the total frequency modulation output if it is determined that the actual frequency of the power grid exceeds the dead zone at the current moment, and perform unit frequency modulation control according to the difference between the total frequency modulation output and the frequency modulation output of the condensate system.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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