A method and system for regulating the power generation of a nuclear power plant

Abstract

The present invention provides a method for regulating the power generation of a nuclear power plant, which includes obtaining the tidal curve of the day according to a preset tidal prediction model; on the obtained tidal curve of the day, obtaining the adjustment time points of the power generation of the nuclear power plant on the day according to a preset adjustment time point definition rule; wherein, the adjustment time point definition rule is defined based on a pre-formed relationship curve between the daily tide and the daily seawater temperature; under the full-power operation condition of the nuclear power plant, according to the obtained adjustment time points of the power generation of the nuclear power plant on the day and a preset adjustment principle, correspondingly adjusting the power generation of the nuclear power plant on the day to achieve stage control of the output of the nuclear power plant according to the seawater temperature. Implementing the present invention can accurately control the output of the unit according to the seawater temperature to obtain the maximum output of the unit, thereby overcoming the phenomenon that the efficiency of the existing nuclear power plant unit is relatively severely affected by the change of seawater temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear power regulation, and in particular to a method and system for regulating the power generation of a nuclear power plant. Background Art

[0002] As Figure 1 shown, there is a quantitative relationship between the power generation of a nuclear power plant and the seawater temperature. Through historical data statistics, the daily change in seawater temperature in the Hongyanhe sea area can reach 1.6°C. Once the seawater temperature is above 25°C, the unit efficiency is more severely affected by the change in seawater temperature, and a phenomenon of up to 8 - 10 MW of full-day power change will occur.

[0003] Therefore, it is necessary to propose a method for regulating the power generation of a nuclear power plant, which can accurately control the output of the unit according to the seawater temperature to obtain the maximum output of the unit, thereby overcoming the phenomenon that the unit efficiency of existing nuclear power plants is more severely affected by the change in seawater temperature. Summary of the Invention

[0004] The technical problem to be solved by the embodiments of the present invention is to provide a method and system for regulating the power generation of a nuclear power plant, which can accurately control the output of the unit according to the seawater temperature to obtain the maximum output of the unit, thereby overcoming the phenomenon that the unit efficiency of existing nuclear power plants is more severely affected by the change in seawater temperature.

[0005] To solve the above technical problem, the embodiments of the present invention provide a method for regulating the power generation of a nuclear power plant, and the method includes the following steps:

[0006] Obtain the daily tide curve according to a preset tide prediction model;

[0007] On the obtained daily tide curve, obtain the adjustment time point of the daily power generation of the nuclear power unit according to a preset adjustment time point definition rule; wherein, the adjustment time point definition rule is defined based on a pre-formed relationship curve between the daily tide and the daily seawater temperature;

[0008] Under the full-power operation condition of the nuclear power unit, perform corresponding adjustment on the daily power generation of the nuclear power unit according to the obtained adjustment time point of the daily power generation of the nuclear power unit and a preset adjustment principle, so as to realize staged control of the output of the nuclear power unit according to the seawater temperature.

[0009] Wherein, the tide prediction model is constructed based on the tide principle, and training samples and test samples are generated from historical tide measurement data for training and testing.

[0010] Wherein, the adjustment time point definition rule includes a first adjustment time point definition rule, a second adjustment time point definition rule, a third adjustment time point definition rule, and a fourth adjustment time point definition rule; wherein,

[0011] The first adjustment time point definition rule is as follows: with reference to the relationship curve between the daily tide and the daily seawater temperature, set the starting moment in the first stage when the seawater temperature curve climbs from the low point to the highest as the first node moment, and map the first node moment to the first adjustment time point on the tide curve, so that the first adjustment time point is the moment with a first time limit value after the low tide moment on the tide curve;

[0012] The second adjustment time point definition rule is as follows: with reference to the relationship curve between the daily tide and the daily seawater temperature, set the starting moment in the second stage when the seawater temperature curve drops sharply from the highest to a stable or weakly rebounding state as the second node moment, and map the second node moment to the second adjustment time point on the tide curve, so that the second adjustment time point is the moment with a second time limit value after the low tide moment on the tide curve; wherein, the second time limit value is greater than the first time limit value;

[0013] The third adjustment time point definition rule is as follows: with reference to the relationship curve between the daily tide and the daily seawater temperature, set the starting moment in the third stage when the seawater temperature curve remains stable or weakly rebounds as the third node moment, and map the third node moment to the third adjustment time point on the tide curve, so that the third adjustment time point is the peak moment of the tide curve;

[0014] The fourth adjustment time point definition rule is as follows: with reference to the relationship curve between the daily tide and the daily seawater temperature, set the starting moment in the fourth stage when the seawater temperature curve drops rapidly from a stable or weakly rebounding state as the fourth node moment, and map the fourth node moment to the fourth adjustment time point on the tide curve, so that the fourth adjustment time point is the moment with a third time limit value after the peak moment on the tide curve.

[0015] Wherein, the lowest temperature on the seawater temperature curve should be greater than 15 °C.

[0016] Wherein, the first time limit value is 0.5 hours; the second time limit value is 4.5 hours; the third time limit value is 5 hours.

[0017] Wherein, the adjustment principle is that the nuclear power does not exceed 101.5%, and the thermal power does not exceed 2902 MW.

[0018] The embodiment of the present invention also provides a nuclear power plant power generation power adjustment system, including a tide prediction unit, an adjustment time point determination unit, and a power generation power adjustment unit; wherein,

[0019] The tide prediction unit is used to obtain the current day's tide curve according to a preset tide prediction model;

[0020] The adjustment time point determination unit is configured to obtain the adjustment time point of the power generation power of the nuclear power unit on the current day according to a preset adjustment time point definition rule on the obtained tidal curve of the current day; wherein, the adjustment time point definition rule is defined based on the relationship curve between the daily tides and the daily seawater temperature formed in advance;

[0021] The power generation power adjustment unit is configured to, under the full power operation condition of the nuclear power unit, correspondingly adjust the power generation power of the nuclear power unit on the current day according to the obtained adjustment time point of the power generation power of the nuclear power unit on the current day and a preset adjustment principle, so as to achieve staged control of the output of the nuclear power unit according to the seawater temperature.

[0022] Wherein, the tidal prediction model is constructed based on the tidal principle, and training samples and test samples are generated from historical tidal measured data for training and testing.

[0023] Wherein, the adjustment principle is that the nuclear power does not exceed 101.5%, and the thermal power does not exceed 2902 MW.

[0024] Implementing the embodiments of the present invention has the following beneficial effects:

[0025] The present invention predicts the tidal curve of the current day based on the tidal principle, and based on the correlation between the daily tides and the changing trend of the daily seawater temperature, determines the adjustment time point of the daily power generation power (that is, reversely deduces the changing situation of the daily seawater temperature), and further combines the adjustment principle to correspondingly adjust the power generation power of the nuclear power unit on the current day, so as to achieve staged control of the output of the nuclear power unit according to the seawater temperature, thereby accurately controlling the output of the unit according to the seawater temperature to obtain the maximum unit output, and overcoming the phenomenon that the efficiency of the existing nuclear power plant unit is relatively severely affected by the change of the seawater temperature. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present invention.

[0027] Figure 1 It is a correlation curve graph of the power generation power of a nuclear power plant and the seawater temperature in the prior art;

[0028] Figure 2 It is a flowchart of a method for adjusting the power generation power of a nuclear power plant provided by an embodiment of the present invention;

[0029] Figure 3It is a relationship curve graph of daily tides and daily seawater temperatures in the application scenario of a nuclear power plant power generation power regulation method provided by an embodiment of the present invention; wherein, a is the tide curve; b is the seawater temperature curve;

[0030] Figure 4 It is a schematic structural diagram of a nuclear power plant power generation power regulation system provided by an embodiment of the present invention. Specific implementation manners

[0031] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] As Figure 2 shown, in an embodiment of the present invention, a nuclear power plant power generation power regulation method is provided, and the method includes the following steps:

[0033] Step S1: Obtain the current-day tide curve according to a preset tide prediction model;

[0034] The specific process is as follows: First, a tide prediction model is constructed based on the tide principle, and training samples and test samples are generated from historical tide measured data for training and testing the tide prediction model. Second, according to the tide prediction model, the current-day tide and its corresponding curve are predicted.

[0035] Step S2: On the obtained current-day tide curve, obtain the regulation time point of the nuclear power unit power generation power according to a preset regulation time point definition rule; wherein, the regulation time point definition rule is defined based on a pre-formed relationship curve of daily tides and daily seawater temperatures;

[0036] The specific process is as follows: First, through the statistics of the sea area tides and water temperatures, it is found that there is a great correlation between the daily seawater temperature change and the daily tide change. Therefore, a relationship curve of daily tides and daily seawater temperatures can be established according to the historical tide measured data and the corresponding seawater temperature measured data, as Figure 3 shown.

[0037] For example, the sea area tide is of a regular semi-diurnal tide type, and the movement form is a reciprocating current. According to the change rules of tides and currents, there are also change rules for seawater temperatures.

[0038] In Figure 3 , according to the statistics, the daily seawater temperature change in the sea area is roughly divided into 4 stages:

[0039] Stage ①: The seawater temperature rises;

[0040] Stage ②: The first stage of the seawater temperature drop, and the seawater temperature changes violently;

[0041] Stage ③: The seawater temperature is stable, or there is a slight rebound;

[0042] Stage ④: The second stage of the seawater temperature decline, with an obvious trend

[0043] Secondly, set the adjustment time point definition rules, which include the first adjustment time point definition rule, the second adjustment time point definition rule, the third adjustment time point definition rule, and the fourth adjustment time point definition rule; among them,

[0044] The first adjustment time point definition rule is based on the relationship curve between the daily tide and the daily seawater temperature. Set the starting moment in the first stage (i.e., stage 1) when the seawater temperature curve climbs from the low point to the highest as the first node moment, and map the first node moment to the first adjustment time point on the tide curve, so that the first adjustment time point is the moment with a first time limit value (such as 0.5 hours) lagging behind the low tide moment on the tide curve; for example, Figure 3 The moment of the lowest trough on the left side of the tide curve + 0.5 hours is the first adjustment time point.

[0045] The second adjustment time point definition rule is based on the relationship curve between the daily tide and the daily seawater temperature. Set the starting moment in the second stage (i.e., stage 2) when the seawater temperature curve drops sharply from the highest to a stable or weak rebound as the second node moment, and map the second node moment to the second adjustment time point on the tide curve, so that the second adjustment time point is the moment with a second time limit value (such as 4.5 hours) lagging behind the low tide moment on the tide curve; among them, the second time limit value (such as 4.5 hours) is greater than the first time limit value (such as 0.5 hours); for example, Figure 3 The moment of the lowest trough on the left side of the tide curve + 4.5 hours is the second adjustment time point.

[0046] The third adjustment time point definition rule is based on the relationship curve between the daily tide and the daily seawater temperature. Set the starting moment in the third stage (i.e., stage 3) when the seawater temperature curve remains stable or has a weak rebound as the third node moment, and map the third node moment to the third adjustment time point on the tide curve, so that the third adjustment time point is the peak moment of the tide curve; for example, Figure 3 The moment of the highest peak on the right side of the tide curve is the third adjustment time point.

[0047] The fourth adjustment time point definition rule is based on the relationship curve between the daily tide and the daily seawater temperature. Set the starting moment in the fourth stage (i.e., stage 4) when the seawater temperature curve drops rapidly from a stable or weak rebound as the fourth node moment, and map the fourth node moment to the fourth adjustment time point on the tide curve, so that the fourth adjustment time point is the moment with a third time limit value (such as 5 hours) lagging behind the peak moment on the tide curve; for example, Figure 3The moment of the highest peak on the right side of the mid-tide curve plus 5 hours is the fourth adjustment time point.

[0048] It should be noted that according to the characteristics of the unit, when the seawater temperature is 15°C or above, for every 1°C change in seawater temperature, the electric power changes by more than 2 MW and the daily power generation power changes by about 3 MW. Therefore, it is recommended to implement this adjustment when the seawater temperature is above 15°C. Thus, the lowest temperature on the specified seawater temperature curve should be greater than 15°C.

[0049] Finally, according to the adjustment time point definition rule, on the obtained daily tide curve, four adjustment time points of the daily nuclear power unit's power generation are defined. It can be understood that through the adjustment time point definition rule, the time change law of the four stages of the daily seawater temperature can be deduced on the daily tide curve.

[0050] Step S3: Under the full-power operation condition of the nuclear power unit, according to the obtained adjustment time points of the daily nuclear power unit's power generation and the preset adjustment principle, adjust the daily power generation of the nuclear power unit accordingly to achieve stage control of the output of the nuclear power unit according to the seawater temperature.

[0051] The specific process is as follows. First, the adjustment principle is formulated as the nuclear power not exceeding 101.5% and the thermal power not exceeding 2902 MW. Second, under the full-power operation condition of the nuclear power unit, according to the above four adjustment time points and the adjustment principle, adjust the daily power generation of the nuclear power unit accordingly to achieve stage control of the output of the nuclear power unit according to the seawater temperature.

[0052] As Figure 4 shown, in the embodiment of the present invention, a nuclear power plant power generation adjustment system is provided, including a tide prediction unit 110, an adjustment time point determination unit 120, and a power generation adjustment unit 130; wherein,

[0053] The tide prediction unit 110 is used to obtain the daily tide curve according to the preset tide prediction model;

[0054] The adjustment time point determination unit 120 is used to obtain the adjustment time points of the daily nuclear power unit's power generation on the obtained daily tide curve according to the preset adjustment time point definition rule; wherein, the adjustment time point definition rule is defined based on the relationship curve between the daily tide and the daily seawater temperature formed in advance;

[0055] The power generation adjustment unit 130 is used to, under the full-power operation condition of the nuclear power unit, adjust the daily power generation of the nuclear power unit accordingly according to the obtained adjustment time points of the daily nuclear power unit's power generation and the preset adjustment principle, so as to achieve stage control of the output of the nuclear power unit according to the seawater temperature.

[0056] Among them, the tidal prediction model is constructed based on the tidal principle, and training samples and test samples are generated from historical measured tidal data for training and testing.

[0057] Among them, the adjustment principle is that the nuclear power does not exceed 101.5%, and the thermal power does not exceed 2902 MW.

[0058] Implementing the embodiments of the present invention has the following beneficial effects:

[0059] The present invention predicts the daily tidal curve based on the tidal principle, and based on the correlation between the daily tide and the daily seawater temperature change trend, determines the adjustment time point of the daily power generation (i.e., inversely deduces the daily seawater temperature change), and further combines the adjustment principle to correspondingly adjust the daily power generation of the nuclear power unit, so as to realize the staged control of the output of the nuclear power unit according to the seawater temperature, thereby accurately controlling the output of the unit according to the seawater temperature to obtain the maximum unit output, overcoming the phenomenon that the efficiency of the existing nuclear power plant unit is severely affected by the seawater temperature change.

[0060] It should be noted that in the above system embodiments, the various units included are only divided according to functional logic, but are not limited to the above division, as long as the corresponding functions can be realized; in addition, the specific names of the functional units are only for the convenience of mutual distinction and do not limit the protection scope of the present invention.

[0061] Those of ordinary skill in the art can understand that all or part of the steps in implementing the above method embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, disk, optical disc, etc.

[0062] The above-disclosed are only the preferred embodiments of the present invention, and of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A method for regulating the power generation of a nuclear power plant, characterized in that, the method includes the following steps: According to a preset tidal prediction model, obtain the tidal curve of the current day; On the obtained tidal curve of the current day, according to the preset regulation time point definition rule, obtain the regulation time point of the power generation of the nuclear power unit on the current day; wherein, the regulation time point definition rule is defined based on the pre-formed relationship curve between the daily tide and the daily seawater temperature; Under the full-power operation condition of the nuclear power unit, according to the obtained regulation time point of the power generation of the nuclear power unit on the current day and the preset regulation principle, correspondingly regulate the power generation of the nuclear power unit on the current day to achieve stage control of the output of the nuclear power unit according to the seawater temperature; wherein, the regulation time point definition rule includes the first regulation time point definition rule, the second regulation time point definition rule, the third regulation time point definition rule and the fourth regulation time point definition rule; wherein, The first regulation time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the first stage where the seawater temperature curve climbs from the low point to the highest as the first node moment, and map the first node moment to the first regulation time point on the tidal curve, so that the first regulation time point is the moment with a first time limit after the low tide moment on the tidal curve; The second regulation time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the second stage where the seawater temperature curve drops sharply from the highest to a stable or weakly rebounding state as the second node moment, and map the second node moment to the second regulation time point on the tidal curve, so that the second regulation time point is the moment with a second time limit after the low tide moment on the tidal curve; wherein, the second time limit is greater than the first time limit; The third regulation time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the third stage where the seawater temperature curve remains stable or weakly rebounds as the third node moment, and map the third node moment to the third regulation time point on the tidal curve, so that the third regulation time point is the peak moment of the tidal curve; The fourth regulation time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the fourth stage where the seawater temperature curve drops rapidly from a stable or weakly rebounding state as the fourth node moment, and map the fourth node moment to the fourth regulation time point on the tidal curve, so that the fourth regulation time point is the moment with a third time limit after the peak moment on the tidal curve.

2. The method for regulating the power generation of a nuclear power plant according to claim 1, characterized in that, the tidal prediction model is constructed based on the tidal principle and is trained and tested by generating training samples and test samples from historical tidal measurement data.

3. The method for regulating the power generation of a nuclear power plant according to claim 1, characterized in that, the lowest temperature on the seawater temperature curve should be greater than 15 °C.

4. The method for adjusting the power generation power of a nuclear power plant according to claim 1, characterized in that, the first time limit is 0.5 hours; the second time limit is 4.5 hours; the third time limit is 5 hours.

5. The method for adjusting the power generation power of a nuclear power plant according to claim 1, characterized in that, the adjustment principle is that the nuclear power does not exceed 101.5%, and the thermal power does not exceed 2902 MW.

6. A system for adjusting the power generation power of a nuclear power plant, characterized in that, it includes a tide prediction unit, an adjustment time point determination unit, and a power generation power adjustment unit; wherein, the tide prediction unit is used to obtain the daily tide curve according to a preset tide prediction model; the adjustment time point determination unit is used to obtain the adjustment time point of the nuclear power unit's power generation power on the obtained daily tide curve according to a preset adjustment time point definition rule; wherein, the adjustment time point definition rule is defined based on the pre-formed relationship curve between the daily tide and the daily seawater temperature; the power generation power adjustment unit is used to, under the full-power operation condition of the nuclear power unit, adjust the daily power generation power of the nuclear power unit accordingly according to the obtained adjustment time point of the nuclear power unit's power generation power on the current day and a preset adjustment principle, so as to realize the staged control of the output of the nuclear power unit according to the seawater temperature; wherein, the adjustment time point definition rule includes a first adjustment time point definition rule, a second adjustment time point definition rule, a third adjustment time point definition rule, and a fourth adjustment time point definition rule; wherein, the first adjustment time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the first stage when the seawater temperature curve climbs from the low point to the highest as the first node moment, and map the first node moment to the first adjustment time point on the tide curve, so that the first adjustment time point is the moment with the first time limit after the low tide moment on the tide curve; the second adjustment time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the second stage when the seawater temperature curve drops sharply from the highest to a stable or weakly rebounding state as the second node moment, and map the second node moment to the second adjustment time point on the tide curve, so that the second adjustment time point is the moment with the second time limit after the low tide moment on the tide curve; wherein, the second time limit is greater than the first time limit; the third adjustment time point definition rule is to use the relationship curve between the daily tide and the daily seawater temperature as a reference, set the starting moment in the third stage when the seawater temperature curve remains stable or weakly rebounds as the third node moment, and map the third node moment to the third adjustment time point on the tide curve, so that the third adjustment time point is the peak moment of the tide curve; The fourth adjustment time point definition rule is as follows: with reference to the relationship curve between the daily tides and the daily seawater temperature, the starting moment in the fourth stage where the seawater temperature curve rapidly drops from being stable or having a weak rebound is set as the fourth node moment, and the fourth node moment is correspondingly mapped to the fourth adjustment time point on the tide curve, such that the fourth adjustment time point is the moment with a third time limit after the peak moment on the tide curve.

7. The nuclear power plant power regulation system according to claim 6, wherein, the tide prediction model is constructed based on the tide principle, and training samples and test samples are generated from historical measured tide data for training and testing.

8. The nuclear power plant power regulation system according to claim 6, wherein, the adjustment principle is that the nuclear power does not exceed 101.5%, and the thermal power does not exceed 2902 MW.

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