Automatic start-up and shutdown power regulation method and system for power plants based on load curves

Abstract

The present invention discloses a method and system for automatic start-up and shutdown power regulation of a power plant based on a load curve, which relates to the technical field of power plant power regulation, including: obtaining start-up and shutdown conditions and power regulation characteristics based on historical data of the power plant; using the start-up and shutdown conditions to simulate start-up and shutdown tests on reference historical data, and obtaining preferred reference data; and automatically starting and shutting down the power plant based on the preferred reference data of standard conditions. The present invention is used to solve the problem in the existing automatic start-up and shutdown power regulation method of a power plant that, when there is no unit in the power plant that can achieve compensatory distribution regulation or there is a separate unit that does not participate in the distribution, the total active power cannot be balanced when the active power is distributed to the units, or the independent units need to be individually regulated, resulting in a decrease in the overall power regulation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of power station power regulation, and in particular to a method and system for automatic start-up and shutdown power regulation of a power station based on a load curve. Background Art

[0002] Automatic power plant start-up and shutdown means that the power plant's generator sets can automatically start and stop under preset conditions without human intervention. This function is mainly achieved through advanced control algorithms and automation systems, which can significantly improve the efficiency and reliability of the power plant. Power plant power regulation refers to adjusting the output power of the generator to adapt to changes in power system demand and ensure the stability and reliability of the power supply.

[0003] Existing methods for automatic start-up and shutdown power regulation of power plants are usually based on a pre-determined scheduling plan curve to reasonably distribute the increased and decreased active power of the units, thereby ensuring that the total active power of all units can be smoothly regulated during automatic start-up and shutdown, thereby reducing the burden on operating personnel and improving the consistency between the active power of the entire plant and the load curve when the units are started and shut down. Although this improved method can effectively achieve smooth regulation during start-up and shutdown power regulation, when there is no unit in the power station that can achieve compensatory distribution regulation or there is a separate unit that does not participate in the distribution, it will lead to the problem that the total active power cannot be balanced when the active power of the units is distributed, or the independent units need to be individually regulated, resulting in a decrease in the overall power regulation efficiency. For example, in the patent application with publication number CN112039128A In the paper, a method for automatic power regulation of AGC start and shutdown of giant units in a hydropower station is disclosed. This scheme is to regulate the active power of the units by increasing and decreasing the active power of the units in pairs according to a pre-set scheduling plan curve when there are more than two units, until all units reach the target value. Other improvements in automatic power regulation of power station start and shutdown are usually improvements in power regulation stability. They still cannot solve the problem that when there is no unit in the power station that can realize compensation distribution regulation or there is a separate unit that does not participate in the distribution, the total active power cannot be balanced when the active power is distributed to the units, or the independent unit needs to be regulated separately, resulting in a decrease in the overall power regulation efficiency. In view of this, it is necessary to improve the existing method for automatic power regulation of power station start and shutdown. Summary of the Invention

[0004] The present invention aims to solve, at least to a certain extent, one of the technical problems in the prior art. By proposing a method and system for automatic start-up and shutdown power regulation of a power plant based on a load curve, the present invention is used to solve the problem in the existing method for automatic start-up and shutdown power regulation of a power plant, that when there is no unit in the power plant that can achieve compensatory distribution regulation or there is a separate unit that does not participate in the distribution, the total active power cannot be balanced when the active power is distributed to the units, or the independent units need to be individually regulated, resulting in a decrease in the overall power regulation efficiency.

[0005] To achieve the above objectives, in a first aspect, the present application provides a method for automatic start-up and shutdown power regulation of a power plant based on a load curve, comprising the following steps:

[0006] Based on the historical data of the power station, historical start and stop data, historical load data, and historical power data of the power station are obtained, and based on the historical data of the power station, multiple start and stop conditions and power regulation characteristics of each start and stop condition are obtained, wherein the start and stop conditions include left start condition, right start condition, no start condition, double start condition, and mixed condition;

[0007] All historical data of the power plant are screened based on each start-up and shutdown condition, and reference historical data for each start-up and shutdown condition is obtained based on the screening results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, a simulated start-up and shutdown test is performed on the reference historical data using the start-up and shutdown condition, and preferred reference data from the reference historical data is obtained based on the test results;

[0008] When the power plant is automatically started and shut down for power adjustment, standard conditions among all start and shut down conditions are obtained based on the real-time data of the power plant, and the power plant is automatically started and shut down for power adjustment based on the preferred reference data of the standard conditions.

[0009] Furthermore, obtaining multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition based on historical data of the power station includes:

[0010] The start and stop time constraint of the power station is recorded as K. Based on the time sequence, all the automatic start and stop moments in the historical start and stop data of the power station with an interval greater than K are obtained in sequence, and recorded as a group of moments YS1 to a group of moments YS n The automatic start and stop times except for the group YS in the power station's historical data are recorded as the second group of times ES1 to the second group of times ES m ;

[0011] For any start / stop moment: [tK, t+K] is recorded as the analysis period of the start / stop moment, where the start / stop moment is any one of the first moments YS or any two-group moments ES, and t is the time of the start / stop moment in the historical data;

[0012] Get the analysis time periods for all the first set of moments YS and the second set of moments ES.

[0013] Furthermore, obtaining multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition based on historical data of the power station also includes:

[0014] For any set of moments YS: the historical load data and historical power corresponding to the analysis period of a set of moments YS in the historical data of the power station are recorded as the analysis load data and analysis power data of a set of moments YS respectively;

[0015] Establish a plane rectangular coordinate system and record it as the load characteristic analysis coordinate system, where the unit of the X-axis of the load characteristic analysis coordinate system is time, and the unit of the Y-axis is KW or Kvar; when the unit of the Y-axis is KW, based on the data corresponding to the active power in the analyzed load data and the analyzed power data, draw the corresponding active power curve in the load characteristic analysis coordinate system and record it as a set of active power curves, where the horizontal coordinate of the rightmost point of the set of active power curves is 2K;

[0016] When the unit of the Y-axis is Kvar, based on the analysis of the load curve and the data corresponding to the reactive power in the power analysis, the corresponding reactive power curve is drawn in the load characteristic analysis coordinate system and recorded as a set of reactive curves, where the horizontal coordinate of the rightmost point of a set of reactive curves is 2K.

[0017] Furthermore, obtaining multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition based on historical data of the power station also includes:

[0018] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of time YS are set to the right start condition;

[0019] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of moments YS are set to the left start condition;

[0020] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of time YS are set to no start condition;

[0021] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of moments YS are set to double start conditions;

[0022] When a group of moments YS does not meet the right opening condition, left opening condition, no opening condition and double opening condition, the start and stop conditions of a group of moments YS are set to mixed conditions;

[0023] Get all the start and stop conditions of a set of moments YS.

[0024] Furthermore, obtaining multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition based on historical data of the power station also includes:

[0025] For any start-stop condition α: record a set of moments YS when the start-stop condition is the start-stop condition α as feature analysis moments; use the regulation feature analysis method to obtain the feature arrays of all feature analysis moments, and record the average value of all feature arrays as the power regulation feature of the start-stop condition α;

[0026] Get the power regulation characteristics for all start and stop conditions.

[0027] Furthermore, the regulation feature analysis method includes:

[0028] For any characteristic analysis moment: the points with horizontal coordinates of 0, K, and 2K in a set of active power curves at the characteristic analysis moment are recorded as q1, q2, and q3 respectively; the points with horizontal coordinates of 0, K, and 2K in a set of reactive power curves are recorded as p1, p2, and p3 respectively;

[0029] Based on the feature analysis algorithm, β1, β2, β3, and β4 are obtained, and the feature array at the feature analysis time is set to [β1, β2, β3, β4]. The feature analysis algorithm is: , where LQ1 and LQ2 are the ordinate and slope of point q1, LP1 and LP2 are the ordinate and slope of point p1, ZQ1 and ZQ2 are the ordinate and slope of point q2, ZP1 and ZP2 are the ordinate and slope of point p2, RQ1 and RQ2 are the ordinate and slope of point q3, RP1 and RP2 are the ordinate and slope of point p3, c is the number of points with ordinates greater than 0 among q1, q2, q3, p1, p2 and p3, G i is the ordinate of the point whose i-th ordinate is greater than 0 among q1, q2, q3, p1, p2 and p3.

[0030] Furthermore, based on the reference historical data and the power regulation characteristics of each start-stop condition, a simulated start-stop test is performed on the reference historical data using the start-stop condition, and based on the test result, preferred reference data in the reference historical data is obtained, including:

[0031] Obtain the start and stop conditions of all two groups of time moments ES. For any start and stop condition α, record the historical data corresponding to the two groups of time moments ES whose start and stop conditions are the start and stop condition α as the reference historical data of the start and stop condition α.

[0032] For any reference historical data: based on the start-up status and stop status of the power station equipment in the reference historical data, the automatic start-up and shutdown of the power station are simulated r times, and the feature arrays corresponding to the two groups of time moments ES are obtained based on the active power curve and reactive power curve obtained based on each simulation. The average value of the r feature arrays obtained based on the r simulations is recorded as the control feature of the two groups of time moments ES, and the sum of the difference between the power regulation feature and the numerical value in the same position in the control feature is recorded as the screening parameter of the reference historical data.

[0033] Furthermore, obtaining the preferred reference data from the reference historical data further includes:

[0034] Obtaining the screening parameters of all reference historical data, and recording the reference historical data corresponding to the screening parameter with the smallest absolute value as the preferred reference data for the start-stop condition α;

[0035] Obtain optimal reference data for all start-up and shutdown conditions.

[0036] Furthermore, obtaining standard conditions among all start-up and shutdown conditions based on the real-time data of the power station, and automatically starting and shutting down the power station based on the preferred reference data of the standard conditions includes:

[0037] When the power station is automatically started and shut down, the time corresponding to the latest start and shutdown of the power station is recorded as the real-time adjustment time, and the start and shutdown conditions corresponding to the real-time adjustment time are obtained and recorded as standard conditions;

[0038] The power station is subjected to power adjustment processing based on the power adjustment mode of the power station after automatic start and stop in the preferred reference data of the standard conditions.

[0039] In a second aspect, the present application also provides a power station automatic start-up and shutdown power regulation system based on a load curve, including a power regulation feature analysis module, a condition data acquisition module, and an automatic power regulation module;

[0040] The power regulation characteristic analysis module is used to obtain historical start and stop data, historical load data, and historical power data of the power station based on the historical data of the power station, and obtain multiple start and stop conditions and power regulation characteristics of each start and stop condition based on the historical data of the power station, wherein the start and stop conditions include left start condition, right start condition, no start condition, double start condition, and mixed condition;

[0041] The conditional data acquisition module is used to filter all historical data of the power station based on each start-up and shutdown condition, and obtain reference historical data for each start-up and shutdown condition based on the screening results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, use the start-up and shutdown conditions to perform simulated start-up and shutdown tests on the reference historical data, and obtain preferred reference data from the reference historical data based on the test results;

[0042] The automatic power adjustment module is used to obtain the standard conditions among all the start and stop conditions based on the real-time data of the power station when automatically starting and stopping the power station, and automatically start and stop the power station based on the preferred reference data of the standard conditions.

[0043] Beneficial effects of the present invention: The present application first obtains historical start-up and shutdown data, historical load data, and historical power data of the power station based on the historical data of the power station, and obtains multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition based on the historical data of the power station; then, all historical data of the power station are screened based on each start-up and shutdown condition, and reference historical data of each start-up and shutdown condition are obtained based on the screening results. The advantage of this is that by obtaining the power regulation characteristics of each start-up and shutdown condition based on the historical data of the power station, it is possible to effectively analyze the status of each unit of the power station when it is started and shut down, and obtain the power regulation characteristics of the unit in each state when it is started and shut down, that is, to obtain the power regulation characteristics of the start-up and shutdown conditions, which is helpful for subsequent analysis to carry out targeted power regulation of the unit based on the status of the unit with real-time power regulation, so as to ensure that the start-up and shutdown power regulation can meet the operating status of the unit; and by obtaining the reference historical data, the most suitable data corresponding to each power regulation characteristic can be obtained, which is helpful to provide reference data for the unit with real-time power regulation in subsequent analysis, so as to improve the power regulation efficiency of the unit;

[0044] This application is also based on the reference historical data and the power regulation characteristics of each start and shutdown condition, and uses the start and shutdown conditions to simulate the start and shutdown test of the reference historical data, and obtains the preferred reference data in the reference historical data based on the test results; finally, when the power station is automatically started and shut down, the standard conditions in all start and shutdown conditions are obtained based on the real-time data of the power station, and the power station is automatically started and shut down based on the preferred reference data of the standard conditions. The advantage of this is that by obtaining the preferred reference data and obtaining the corresponding standard conditions based on the real-time data of the power station, the power is adjusted during automatic start and shutdown based on the preferred reference data of the standard conditions, which helps to ensure that the power regulation of the power station during power adjustment can be consistent with the current status of the units in the power station and consistent with the actual load curve, so as to improve the accuracy of power adjustment and achieve power balance and stability of all units in the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a principle block diagram of the system of the present invention;

[0046] Figure 2 is a flow chart of the steps of the method of the present invention;

[0047] Figure 3 A schematic diagram of a load characteristic analysis coordinate system of the present invention;

[0048] Figure 4Schematic diagram of data acquisition for the feature analysis algorithm of the present invention;

[0049] Figure 5 Schematic diagram of the structure of the electronic device of the present invention. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0051] Example 1, please refer to Figure 1 As shown, the present application provides a power station automatic start-up and shutdown power regulation system based on load curve, including a power regulation feature analysis module, a condition data acquisition module and an automatic power regulation module;

[0052] The power regulation characteristic analysis module is used to obtain historical start and stop data, historical load data, and historical power data of the power station based on the historical data of the power station, and obtain multiple start and stop conditions and power regulation characteristics of each start and stop condition based on the historical data of the power station, wherein the start and stop conditions include left start condition, right start condition, no start condition, double start condition, and mixed condition;

[0053] The power regulation feature analysis module includes a power regulation feature analysis unit. The power regulation feature analysis unit is configured with a power regulation feature analysis strategy. The power regulation feature analysis strategy includes:

[0054] The start and stop time constraint of the power station is recorded as K. Based on the time sequence, all the automatic start and stop moments in the historical start and stop data of the power station with an interval greater than K are obtained in sequence, and recorded as a group of moments YS1 to a group of moments YS n The automatic start and stop times except for the group YS in the power station's historical data are recorded as the second group of times ES1 to the second group of times ES m ;

[0055] During the specific implementation process, the start and shutdown time constraints can range from a few minutes to several hours. The value of K can be determined according to the actual start and shutdown time constraints of the power station during actual analysis. In this embodiment, the value of K is set to 30 minutes. In this embodiment, if all the automatic start and shutdown times obtained include 12:30, 12:40 and 13:10 in a day, then through analysis, it can be obtained that 12:30 and 13:10 can be recorded as a group of moments YS, and 12:40 can be recorded as two groups of moments ES. The purpose of distinguishing between the group of moments YS and the two groups of moments ES is to help prevent the same analysis data from causing distortion of the analysis results when the power regulation characteristics and preferred reference data are subsequently analyzed. At the same time, the moments in a group of moments YS are all greater than K, which can ensure that the start and shutdown data of more different units in a group of moments YS can be analyzed, so as to ensure that the power regulation characteristics can better meet the corresponding start and shutdown conditions.

[0056] For any start / stop moment: [tK, t+K] is recorded as the analysis period of the start / stop moment, where the start / stop moment is any one of the first moments YS or any two-group moments ES, and t is the time of the start / stop moment in the historical data;

[0057] Get the analysis time periods for all the first set of moments YS and the second set of moments ES;

[0058] For any set of moments YS: the historical load data and historical power corresponding to the analysis period of a set of moments YS in the historical data of the power station are recorded as the analysis load data and analysis power data of a set of moments YS respectively;

[0059] Establish a plane rectangular coordinate system and record it as the load characteristic analysis coordinate system, where the unit of the X-axis of the load characteristic analysis coordinate system is time, and the unit of the Y-axis is KW or Kvar; when the unit of the Y-axis is KW, based on the data corresponding to the active power in the analyzed load data and the analyzed power data, draw the corresponding active power curve in the load characteristic analysis coordinate system and record it as a set of active power curves, where the horizontal coordinate of the rightmost point of the set of active power curves is 2K;

[0060] When the unit of the Y axis is Kvar, based on the load analysis curve and the data corresponding to the reactive power in the power analysis, the corresponding reactive power curve is drawn in the load characteristic analysis coordinate system and recorded as a set of reactive curves, where the horizontal coordinate of the rightmost point of a set of reactive curves is 2K;

[0061] In the specific implementation process, by analyzing the active power curve and the reactive power curve respectively, and the time interval is from K before the start and stop time to K after the start and stop time, it is helpful to conduct a comprehensive analysis of the power changes when the units in the power station are started and stopped, so as to ensure that the start and stop conditions that meet the start and stop conditions of each group of time YS can be obtained when setting the start and stop conditions;

[0062] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of time YS are set to the right start condition;

[0063] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of moments YS are set to the left start condition;

[0064] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of time YS are set to no start condition;

[0065] When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of moments YS are set to double start conditions;

[0066] When a group of moments YS does not meet the right opening condition, left opening condition, no opening condition and double opening condition, the start and stop conditions of a group of moments YS are set to mixed conditions;

[0067] In the specific implementation process, for example, during a data analysis, a set of load characteristic analysis coordinate systems of YS1 at a certain moment is obtained as follows: Figure 3 As shown, curve FH1 is a set of active power curves, and curve FH2 is a set of reactive power curves. Through analysis, it can be obtained that the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0, and the ordinates of the points with abscissa 2K are both greater than 0. Then the start and stop conditions of a set of time YS1 can be recorded as double start conditions;

[0068] Get all the start and stop conditions of a set of moments YS;

[0069] For any start-stop condition α: record a set of moments YS when the start-stop condition is the start-stop condition α as feature analysis moments; use the regulation feature analysis method to obtain the feature arrays of all feature analysis moments, and record the average value of all feature arrays as the power regulation feature of the start-stop condition α;

[0070] The regulation characteristic analysis method includes: step S1121, for any characteristic analysis moment: recording points with horizontal coordinates of 0, K, and 2K in a set of active power curves at the characteristic analysis moment as q1, q2, and q3, respectively; recording points with horizontal coordinates of 0, K, and 2K in a set of reactive power curves as p1, p2, and p3, respectively;

[0071] Based on the feature analysis algorithm, β1, β2, β3, and β4 are obtained, and the feature array at the feature analysis time is set to [β1, β2, β3, β4]. The feature analysis algorithm is: , where LQ1 and LQ2 are the ordinate and slope of point q1, LP1 and LP2 are the ordinate and slope of point p1, ZQ1 and ZQ2 are the ordinate and slope of point q2, ZP1 and ZP2 are the ordinate and slope of point p2, RQ1 and RQ2 are the ordinate and slope of point q3, RP1 and RP2 are the ordinate and slope of point p3, c is the number of points with ordinates greater than 0 among q1, q2, q3, p1, p2 and p3, G i is the ordinate of the point whose ordinate is greater than 0 among q1, q2, q3, p1, p2 and p3;

[0072] In the specific implementation process, for example, during a data analysis, the load characteristic analysis coordinate system corresponding to the start-stop condition α at a characteristic analysis moment is as follows: Figure 4 As shown, the slopes of points q1, q2, q3, p1, p2, and p3 are 1, -1, 2, 1, -2, and 2, respectively. The characteristic array at the time of characteristic analysis is [5.4, -4.5, 9, -25.2];

[0073] Obtain power regulation characteristics for all start-stop conditions;

[0074] In this embodiment, obtaining the power regulation characteristics helps to perform targeted power regulation on the unit based on the status of the unit under real-time power regulation during subsequent analysis, so as to ensure that the power regulation during startup and shutdown is consistent with the operating status of the unit.

[0075] The conditional data acquisition module is used to filter all historical data of the power station based on each start-up and shutdown condition, and obtain reference historical data for each start-up and shutdown condition based on the screening results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, use the start-up and shutdown conditions to perform simulated start-up and shutdown tests on the reference historical data, and obtain preferred reference data from the reference historical data based on the test results;

[0076] The conditional data acquisition module includes a preferred data screening unit, which is configured with a preferred data screening strategy. The preferred data screening strategy includes:

[0077] Obtain the start and stop conditions of all two groups of time moments ES. For any start and stop condition α, record the historical data corresponding to the two groups of time moments ES whose start and stop conditions are the start and stop condition α as the reference historical data of the start and stop condition α.

[0078] For any reference historical data: based on the startup and shutdown status of the power plant equipment in the reference historical data, perform r simulations of the power plant's automatic startup and shutdown, and obtain the feature arrays corresponding to the two sets of time instants ES based on the active power curve and reactive power curve obtained in each simulation. The average value of the r feature arrays obtained based on the r simulations is recorded as the comparison feature of the two sets of time instants ES, and the sum of the differences between the power regulation feature and the values ​​at the same position in the comparison feature is recorded as the screening parameter of the reference historical data;

[0079] In a specific implementation, the value of r can be set according to the data processing capability of the device during actual analysis. In this embodiment, the purpose is to make the obtained control characteristics more consistent with the actual state of the ES at the two groups of time points through multiple simulations. In this embodiment, the value of r is set to 10. For example, in actual analysis, the power regulation characteristics and control characteristics obtained are [5.4, -4.5, 9, -25.2] and [5.4, 0, 9, 5.2], respectively. Then, by calculation, it can be obtained that the differences in the values ​​at the same position are 0, -4.5, 0, and -30.4, respectively. Then, by calculation, it can be obtained that the screening parameter for reference to historical data is -34.9.

[0080] Obtaining the screening parameters of all reference historical data, and recording the reference historical data corresponding to the screening parameter with the smallest absolute value as the preferred reference data for the start-stop condition α;

[0081] Obtain optimal reference data for all start-up and shutdown conditions.

[0082] The automatic power adjustment module is used to obtain standard conditions from all start-up and shutdown conditions based on the real-time data of the power station when automatically adjusting the power of the power station, and automatically adjust the power of the power station based on the preferred reference data of the standard conditions. The automatic power adjustment module includes an automatic start-up and shutdown power adjustment unit, which is equipped with an automatic start-up and shutdown power adjustment strategy. The automatic start-up and shutdown power adjustment strategy includes:

[0083] When the power station is automatically started and shut down, the time corresponding to the latest start and shutdown of the power station is recorded as the real-time adjustment time, and the start and shutdown conditions corresponding to the real-time adjustment time are obtained and recorded as standard conditions;

[0084] The power station is power-adjusted based on the power adjustment method of the power station after automatic start-up and shutdown in the preferred reference data of standard conditions. In the specific implementation process, by obtaining the standard conditions corresponding to the real-time adjustment moment of the power station and performing power adjustment based on the preferred reference data of the standard conditions, it helps to ensure that the power adjustment of the power station during power adjustment can be consistent with the current status of the units in the power station and the actual load curve, so as to improve the accuracy of power adjustment and achieve power balance and stability of all units in the power station.

[0085] Example 2, please refer to Figure 2 As shown, the present application also provides a method for automatically starting and stopping a power plant based on a load curve, comprising the following steps:

[0086] Step S1, based on the historical data of the power station, obtaining historical start-up and shutdown data, historical load data, and historical power data of the power station, and obtaining multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition based on the historical data of the power station, wherein the start-up and shutdown conditions include a left-on condition, a right-on condition, a non-start-up condition, a double-on condition, and a mixed condition;

[0087] Step S1 includes: Step S101, record the start and stop time constraint of the power station as K, obtain all the automatic start and stop moments in the historical start and stop data of the power station based on the time sequence and record them as a group of moments YS1 to a group of moments YS n The automatic start and stop times except for the group YS in the power station's historical data are recorded as the second group of times ES1 to the second group of times ES m ;

[0088] Step S102: for any start / stop moment: record [tK, t+K] as the analysis period of the start / stop moment, where the start / stop moment is any one of the first-group moments YS or any one of the second-group moments ES, and t is the time of the start / stop moment in the historical data;

[0089] Get the analysis time periods for all the first set of moments YS and the second set of moments ES;

[0090] Step S103, for any set of time moments YS: record the historical load data and historical power corresponding to the analysis time period of the set of time moments YS in the historical data of the power station as the analysis load data and analysis power data of the set of time moments YS respectively;

[0091] Step S104: Establish a plane rectangular coordinate system and record it as the load characteristic analysis coordinate system, where the unit of the X-axis of the load characteristic analysis coordinate system is time, and the unit of the Y-axis is kW or Kvar. When the unit of the Y-axis is kW, based on the analyzed load data and the data corresponding to the active power in the analyzed power data, draw the corresponding active power curve in the load characteristic analysis coordinate system and record it as a set of active power curves, where the horizontal coordinate of the rightmost point of the set of active power curves is 2K.

[0092] Step S105: When the unit of the Y axis is Kvar, based on the load analysis curve and the data corresponding to the reactive power in the power analysis, the corresponding reactive power curve is drawn in the load characteristic analysis coordinate system and recorded as a set of reactive power curves, wherein the horizontal coordinate of the rightmost point of the set of reactive power curves is 2K;

[0093] Step S106: When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of time points YS are set to the right start condition;

[0094] Step S107: When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of time points YS are set to the left start condition;

[0095] Step S108, when the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of time points YS are set to no start condition;

[0096] Step S109: When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of time points YS are set to dual start conditions;

[0097] Step S110, when a group of moments YS does not meet the right opening condition, the left opening condition, the non-opening condition, and the double opening condition, the start and stop conditions of the group of moments YS are set to mixed conditions;

[0098] Step S111, obtaining all the start and stop conditions of a group of moments YS;

[0099] Step S112: For any start / stop condition α, a group of moments YS at which the start / stop condition is the start / stop condition α is recorded as feature analysis moments; a feature array of all feature analysis moments is obtained using a regulation feature analysis method, and the average value of all feature arrays is recorded as the power regulation feature of the start / stop condition α;

[0100] The regulation characteristic analysis method includes: step S1121, for any characteristic analysis moment: recording points with horizontal coordinates of 0, K, and 2K in a set of active power curves at the characteristic analysis moment as q1, q2, and q3, respectively; recording points with horizontal coordinates of 0, K, and 2K in a set of reactive power curves as p1, p2, and p3, respectively;

[0101] Step S1122: Obtain β1, β2, β3, and β4 based on a feature analysis algorithm, and set the feature array at the feature analysis time to [β1, β2, β3, β4]. The feature analysis algorithm is: , where LQ1 and LQ2 are the ordinate and slope of point q1, LP1 and LP2 are the ordinate and slope of point p1, ZQ1 and ZQ2 are the ordinate and slope of point q2, ZP1 and ZP2 are the ordinate and slope of point p2, RQ1 and RQ2 are the ordinate and slope of point q3, RP1 and RP2 are the ordinate and slope of point p3, c is the number of points with ordinates greater than 0 among q1, q2, q3, p1, p2 and p3, G i is the ordinate of the point whose ordinate is greater than 0 among q1, q2, q3, p1, p2 and p3;

[0102] Step S113: obtaining power regulation characteristics of all start-up and shutdown conditions.

[0103] Step S2: All historical data of the power station are screened based on each start-up and shutdown condition, and reference historical data for each start-up and shutdown condition is obtained based on the screening results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, a simulated start-up and shutdown test is performed on the reference historical data using the start-up and shutdown condition, and preferred reference data from the reference historical data is obtained based on the test results;

[0104] Step S2 includes: step S201, obtaining the start and stop conditions of all two groups of time moments ES, and for any start and stop condition α: recording the historical data corresponding to the two groups of time moments ES whose start and stop conditions are the start and stop condition α in the two groups of time moments ES as reference historical data of the start and stop condition α;

[0105] Step S202: For any reference historical data, perform r simulations of the power plant's automatic startup and shutdown based on the power plant's equipment startup and shutdown states in the reference historical data. Obtain feature arrays corresponding to two sets of time instants ES based on the active power curve and reactive power curve obtained in each simulation. Record the average of the r feature arrays obtained based on the r simulations as the comparison feature for the two sets of time instants ES. Record the sum of the differences between the power regulation feature and the values ​​at the same position in the comparison feature as the screening parameter for the reference historical data.

[0106] Step S203, obtaining the screening parameters of all reference historical data, and recording the reference historical data corresponding to the screening parameter with the smallest absolute value as the preferred reference data for the start-stop condition α;

[0107] Step S204: Obtaining optimal reference data for all start-up and shutdown conditions.

[0108] Step S3, when automatically starting and stopping the power plant, obtaining standard conditions from all start and stop conditions based on the real-time data of the power plant, and automatically starting and stopping the power plant based on the preferred reference data of the standard conditions;

[0109] Step S3 includes: step S301, when the power station is automatically started and stopped, recording the time corresponding to the latest start and stop of the power station as the real-time adjustment time, obtaining the start and stop conditions corresponding to the real-time adjustment time, and recording them as standard conditions;

[0110] Step S302 : performing power regulation processing on the power station based on the power regulation mode of the power station after automatic start and stop in the preferred reference data of the standard conditions.

[0111] Example 3, please refer to Figure 5 As shown, Figure 5 An example structural diagram of an electronic device is provided. The electronic device may include: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus. The memory stores computer-readable instructions, and the processor can call the instructions in the memory. When the computer-readable instructions are executed by the processor, the steps in the method for automatic start-up and shutdown power regulation of a power plant based on a load curve are executed to achieve the following functions: first, based on the historical data of the power plant, the historical start-up and shutdown data, historical load data and historical power data of the power plant are obtained, and based on the historical data of the power plant, multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition are obtained; then, based on each start-up and shutdown condition, all historical data of the power plant are filtered, and based on the filtering results, reference historical data of each start-up and shutdown condition are obtained; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, the start-up and shutdown conditions are used to simulate start-up and shutdown tests on the reference historical data, and based on the test results, preferred reference data in the reference historical data are obtained; finally, when the power plant is automatically started and shut down, standard conditions in all start-up and shutdown conditions are obtained based on the real-time data of the power plant, and the power plant is automatically started and shut down based on the preferred reference data of the standard conditions.

[0112] In addition, the logical instructions in the above-mentioned memory can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present application, or the part that contributes to the existing technology, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, and other media that can store program code.

[0113] Example 4. The present application also provides a computer-readable storage medium. The present application provides a storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method for automatic start-up and shutdown power adjustment of a power station based on a load curve are executed to achieve the following functions: first, based on the historical data of the power station, the historical start-up and shutdown data, historical load data and historical power data of the power station are obtained, and based on the historical data of the power station, multiple start-up and shutdown conditions and power regulation characteristics of each start-up and shutdown condition are obtained; then, based on each start-up and shutdown condition, all historical data of the power station are filtered, and reference historical data of each start-up and shutdown condition are obtained based on the filtering results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, the start-up and shutdown conditions are used to simulate start-up and shutdown tests on the reference historical data, and preferred reference data in the reference historical data are obtained based on the test results; finally, when the power station is automatically started and shut down, standard conditions in all start-up and shutdown conditions are obtained based on the real-time data of the power station, and the power station is automatically started and shut down based on the preferred reference data of the standard conditions.

[0114] Through the description of the above embodiments, the embodiments of the present invention can be provided as methods, systems, or computer program products. Based on this understanding, the essence of the above technical solutions or the portion that contributes to the prior art can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for enabling a computer device (such as a personal computer, server, or network device) to execute the methods described in various embodiments or certain portions of the embodiments.

[0115] In the embodiments provided in this application, it should be understood that the disclosed system or method can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or units can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of systems, modules and units can be electrical, mechanical or other forms.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for automatically starting and stopping a power plant based on a load curve, characterized in that: The steps include: Based on the historical data of the power station, historical start and stop data, historical load data, and historical power data of the power station are obtained, and based on the historical data of the power station, multiple start and stop conditions and power regulation characteristics of each start and stop condition are obtained, wherein the start and stop conditions include left start condition, right start condition, no start condition, double start condition, and mixed condition; All historical data of the power plant are screened based on each start-up and shutdown condition, and reference historical data for each start-up and shutdown condition is obtained based on the screening results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, a simulated start-up and shutdown test is performed on the reference historical data using the start-up and shutdown condition, and preferred reference data from the reference historical data is obtained based on the test results; When automatically starting and stopping the power plant, the standard conditions among all the start and stop conditions are obtained based on the real-time data of the power plant, and the power plant is automatically started and stopped based on the preferred reference data of the standard conditions; Based on the historical data of the power plant, multiple start and stop conditions and the power regulation characteristics of each start and stop condition are obtained, including: The start and stop time constraint of the power station is recorded as K. Based on the time sequence, all the automatic start and stop moments in the historical start and stop data of the power station with an interval greater than K are obtained in sequence, and recorded as a group of moments YS1 to a group of moments YS n The automatic start and stop times except for the group YS in the power station's historical data are recorded as the second group of times ES1 to the second group of times ES m ; For any start / stop moment: [tK, t+K] is recorded as the analysis period of the start / stop moment, where the start / stop moment is any one of the first moments YS or any two-group moments ES, and t is the time of the start / stop moment in the historical data; Get the analysis time periods for all the first set of moments YS and the second set of moments ES; Based on the real-time data of the power plant, the standard conditions among all the start-up and shutdown conditions are obtained, and the power plant is automatically started and shut down and adjusted based on the preferred reference data of the standard conditions, including: When the power station is automatically started and shut down, the time corresponding to the latest start and shutdown of the power station is recorded as the real-time adjustment time, and the start and shutdown conditions corresponding to the real-time adjustment time are obtained and recorded as standard conditions; The power station is subjected to power adjustment processing based on the power adjustment mode of the power station after automatic start and stop in the preferred reference data of the standard conditions.

2. The method for automatic start-up and shutdown of a power plant based on a load curve according to claim 1, characterized in that: The power regulation features for obtaining multiple start and stop conditions based on the power plant's historical data and each start and stop condition also include: For any set of moments YS: the historical load data and historical power corresponding to the analysis period of a set of moments YS in the historical data of the power station are recorded as the analysis load data and analysis power data of a set of moments YS respectively; Establish a plane rectangular coordinate system and record it as the load characteristic analysis coordinate system, where the unit of the X-axis of the load characteristic analysis coordinate system is time, and the unit of the Y-axis is KW or Kvar; when the unit of the Y-axis is KW, based on the data corresponding to the active power in the analyzed load data and the analyzed power data, draw the corresponding active power curve in the load characteristic analysis coordinate system and record it as a set of active power curves, where the horizontal coordinate of the rightmost point of the set of active power curves is 2K; When the unit of the Y-axis is Kvar, based on the analysis of the load curve and the data corresponding to the reactive power in the power analysis, the corresponding reactive power curve is drawn in the load characteristic analysis coordinate system and recorded as a set of reactive curves, where the horizontal coordinate of the rightmost point of a set of reactive curves is 2K.

3. The method for automatic start-up and shutdown of a power plant based on a load curve according to claim 2, characterized in that: The power regulation features for obtaining multiple start and stop conditions based on the power plant's historical data and each start and stop condition also include: When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of time YS are set to the right start condition; When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of moments YS are set to the left start condition; When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both 0 and the ordinates of the points with abscissa 2K are both 0, the start and stop conditions of a set of time YS are set to no start condition; When the ordinates of the points with abscissa 0 in a set of active power curves and a set of reactive power curves are both greater than 0 and the ordinates of the points with abscissa 2K are both greater than 0, the start and stop conditions of a set of moments YS are set to double start conditions; When a group of moments YS does not meet the right opening condition, left opening condition, no opening condition and double opening condition, the start and stop conditions of a group of moments YS are set to mixed conditions; Get all the start and stop conditions of a set of moments YS.

4. The method for automatic start-up and shutdown of a power plant based on a load curve according to claim 3 is characterized in that: The power regulation features for obtaining multiple start and stop conditions based on the power plant's historical data and each start and stop condition also include: For any start-stop condition α: record a set of moments YS when the start-stop condition is the start-stop condition α as feature analysis moments; use the regulation feature analysis method to obtain the feature arrays of all feature analysis moments, and record the average value of all feature arrays as the power regulation feature of the start-stop condition α; Get the power regulation characteristics for all start and stop conditions.

5. The method for automatic start-up and shutdown of a power plant based on a load curve according to claim 4 is characterized in that: The regulatory signature analysis method includes: For any characteristic analysis moment: the points with horizontal coordinates of 0, K, and 2K in a set of active power curves at the characteristic analysis moment are recorded as q1, q2, and q3 respectively; the points with horizontal coordinates of 0, K, and 2K in a set of reactive power curves are recorded as p1, p2, and p3 respectively; Based on the feature analysis algorithm, β1, β2, β3, and β4 are obtained, and the feature array at the feature analysis time is set to [β1, β2, β3, β4]. The feature analysis algorithm is: , where LQ1 and LQ2 are the ordinate and slope of point q1, LP1 and LP2 are the ordinate and slope of point p1, ZQ1 and ZQ2 are the ordinate and slope of point q2, ZP1 and ZP2 are the ordinate and slope of point p2, RQ1 and RQ2 are the ordinate and slope of point q3, RP1 and RP2 are the ordinate and slope of point p3, c is the number of points with ordinates greater than 0 among q1, q2, q3, p1, p2 and p3, G i is the ordinate of the point whose i-th ordinate is greater than 0 among q1, q2, q3, p1, p2 and p3.

6. The method for automatic start-up and shutdown of a power plant based on a load curve according to claim 5 is characterized in that: Based on the reference historical data and the power regulation characteristics of each start-stop condition, using the start-stop condition to simulate the start-stop test of the reference historical data, and obtaining preferred reference data from the reference historical data based on the test results includes: Obtain the start and stop conditions of all two groups of time moments ES. For any start and stop condition α, record the historical data corresponding to the two groups of time moments ES whose start and stop conditions are the start and stop condition α as the reference historical data of the start and stop condition α. For any reference historical data: based on the start-up status and stop status of the power station equipment in the reference historical data, the automatic start-up and shutdown of the power station are simulated r times, and the feature arrays corresponding to the two groups of time moments ES are obtained based on the active power curve and reactive power curve obtained based on each simulation. The average value of the r feature arrays obtained based on the r simulations is recorded as the control feature of the two groups of time moments ES, and the sum of the difference between the power regulation feature and the numerical value in the same position in the control feature is recorded as the screening parameter of the reference historical data.

7. The method for automatic start-up and shutdown of a power plant based on a load curve according to claim 6, characterized in that: Acquiring preferred reference data from the reference historical data further includes: Obtaining the screening parameters of all reference historical data, and recording the reference historical data corresponding to the screening parameter with the smallest absolute value as the preferred reference data for the start-stop condition α; Obtain optimal reference data for all start-up and shutdown conditions.

8. A power plant automatic start-up and shutdown power regulation system based on a load curve, used to implement the power plant automatic start-up and shutdown power regulation method based on a load curve according to any one of claims 1 to 7, characterized in that: It includes power regulation feature analysis module, condition data acquisition module and automatic power regulation module; The power regulation characteristic analysis module is used to obtain historical start and stop data, historical load data, and historical power data of the power station based on the historical data of the power station, and obtain multiple start and stop conditions and power regulation characteristics of each start and stop condition based on the historical data of the power station, wherein the start and stop conditions include left start condition, right start condition, no start condition, double start condition, and mixed condition; The conditional data acquisition module is used to filter all historical data of the power station based on each start-up and shutdown condition, and obtain reference historical data for each start-up and shutdown condition based on the screening results; based on the reference historical data and the power regulation characteristics of each start-up and shutdown condition, use the start-up and shutdown conditions to perform simulated start-up and shutdown tests on the reference historical data, and obtain preferred reference data from the reference historical data based on the test results; The automatic power adjustment module is used to obtain the standard conditions among all the start and stop conditions based on the real-time data of the power station when automatically starting and stopping the power station, and automatically start and stop the power station based on the preferred reference data of the standard conditions.

Images