A method and device for calculating the time taken for reservoir characteristic flow to reach the dam

Abstract

The present invention discloses a method and device for calculating the time it takes for a reservoir characteristic flow to arrive in front of a dam. The method superimposes preset marked flow change information on characteristic flow change information in measured incoming flow change information to obtain characteristic incoming flow change information, obtains corresponding first outflow flow change information based on the measured incoming flow change information, obtains corresponding second outflow flow change information based on the characteristic incoming flow change information, determines differential flow change information in front of the dam based on the difference between the first outflow flow change information and the second outflow flow change information, and determines the time it takes for the characteristic flow to arrive in front of the dam based on the differential flow change information in front of the dam and the marked flow change information. The method of the present invention can calculate the time it takes for the characteristic flow to arrive in front of the dam when the water level and flow in front of the dam change arbitrarily, effectively improving the accuracy of the calculation result of the time it takes for the characteristic flow to arrive in front of the dam, and is of great value for formulating large-scale reservoir operation plans, stable scheduling and safe operation of reservoirs.

Description

Technical Field

[0001] The invention relates to the technical field of reservoir operation and regulation, and in particular to a method and device for calculating the time taken for a reservoir characteristic flow to arrive in front of a dam. Background Art

[0002] Water flow movement has two characteristics: motion wave and dynamic wave. The speed and duration of water flow movement with the two characteristics are very different. The water flow movement in the river exhibits the characteristics of motion wave, and the water flow movement in the reservoir exhibits the characteristics of dynamic wave. For large river reservoirs, water flow movement will exhibit both motion wave and dynamic wave characteristics, making the calculation of characteristic flow duration very complicated. Reservoir flood control scheduling, power generation scheduling, etc. are mainly formulated based on the flow in front of the dam. If the duration of the characteristic flow reaching the dam cannot be accurately obtained, it will cause a large fluctuation in the water level in front of the dam, which will have an adverse impact on the smooth operation of the reservoir.

[0003] In the prior art, the time it takes for the characteristic flow to arrive in front of the dam is generally determined based on the process of the incoming flow change and the process of the outflow flow change in front of the dam. The time it takes for the characteristic flow to arrive in front of the dam is determined by the process of the incoming flow change and the process of the outflow flow change in front of the dam, and the incoming flow change curve and the outflow flow change curve in front of the dam are determined based on the process of the incoming flow change and the process of the outflow flow change in front of the dam. The incoming flow change process includes the characteristic flow change process, and the time when the characteristic flow arrives in front of the dam is determined based on the similarity between the incoming flow change curve and the outflow flow change curve in front of the dam, and then the time it takes for the characteristic flow to arrive in front of the dam is calculated based on the time when the characteristic flow arrives in front of the dam and the characteristic flow change process; however, when the incoming flow change curve and the outflow flow change curve in front of the dam change in complex and irregular ways, it is impossible to accurately determine whether the change in the flow in front of the dam is caused by the arrival of the characteristic flow in front of the dam based only on the incoming flow change curve and the outflow flow change curve in front of the dam, and therefore it is impossible to accurately calculate the time it takes for the characteristic flow to arrive in front of the dam. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the prior art cannot accurately calculate the time it takes for the characteristic flow to arrive in front of the dam, thereby providing a method and device for calculating the time it takes for the characteristic flow of a reservoir to arrive in front of the dam.

[0005] In the first aspect, an embodiment of the present invention discloses a method for calculating the time it takes for a reservoir characteristic flow to arrive in front of a dam, obtaining measured incoming flow change information within a first time period, the measured incoming flow change information being used to characterize the incoming flow at different times; obtaining first outflow flow change information based on the measured incoming flow change information within the first time period; superimposing preset marked flow change information on the characteristic flow in the measured incoming flow change information to obtain characteristic incoming flow change information, the characteristic flow corresponding to a second time period, the second time period being included in the first time period; obtaining second outflow flow change information based on the characteristic incoming flow change information; determining differential flow change information in front of the dam based on the difference between the second outflow flow change information and the first outflow flow change information; and determining the time it takes for the characteristic flow to arrive in front of the dam based on the marked flow change information and the differential flow change information in front of the dam.

[0006] The method for calculating the time it takes for the characteristic flow of a reservoir to arrive in front of the dam provided by the present invention is to obtain the characteristic incoming flow change information by superimposing the preset marked flow change information on the characteristic flow change information in the measured incoming flow change information, obtain the corresponding first outflow flow change information based on the measured incoming flow change information, obtain the corresponding second outflow flow change information based on the characteristic incoming flow change information, determine the differential flow change information in front of the dam based on the difference between the first outflow flow change information and the second outflow flow change information, and determine the time it takes for the characteristic flow to arrive in front of the dam based on the differential flow change information in front of the dam and the marked flow change information. The method of the present invention can calculate the time it takes for the characteristic flow to arrive in front of the dam when the water level and flow in front of the dam change arbitrarily, by superimposing the preset marked flow change information on the characteristic flow change information in the measured incoming flow change information, and then capturing the time when the marked flow appears, so as to effectively improve the accuracy of the calculation result of the time it takes for the characteristic flow to arrive in front of the dam, and has important value for formulating operation plans for large reservoirs, and for the smooth dispatch and safe operation of reservoirs.

[0007] In combination with the first aspect, in a possible implementation of the first aspect, first outflow flow change information is obtained based on the measured inflow flow change information within the first time period, including: obtaining the water level information along the reservoir and the water level change information in front of the dam within the first time period; inputting the measured inflow flow change information within the first time period, the water level information along the reservoir and the water level change information in front of the dam into a pre-established non-steady flow hydrodynamic model to obtain the first outflow flow change information.

[0008] The method provided in this embodiment can accurately calculate the first outflow flow rate change information through the non-steady flow hydrodynamic model.

[0009] In combination with the first aspect, in a possible implementation of the first aspect, obtaining water level information along the reservoir in a first time period includes: inputting measured inflow flow change information and water level change information in front of the dam in the first time period into a pre-established constant flow hydrodynamic model to obtain the water level along the reservoir.

[0010] In combination with the first aspect, in a possible implementation of the first aspect, the duration for the characteristic flow to arrive in front of the dam is determined based on the marked flow change information and the differential flow change information in front of the dam, including: determining the target information segment corresponding to the marked flow change information in the differential flow change information in front of the dam; and determining the duration for the characteristic flow to arrive in front of the dam based on the time information of the target information segment and the second time period.

[0011] In combination with the first aspect, in a possible implementation of the first aspect, in the dam front differential flow change information, determining a target information segment corresponding to the marked flow change information, including: determining a marked flow change curve based on the marked flow change information, the marked flow change curve being used to characterize the change information of the marked flow over time; determining a dam front differential flow change curve based on the dam front differential flow change information, the dam front differential flow change curve being used to characterize the change information of the dam front differential flow over time; determining the curve segment in the dam front differential flow change curve that has the highest similarity with the marked flow change curve as the target information segment.

[0012] In combination with the first aspect, in a possible implementation of the first aspect, the duration for the characteristic flow to arrive in front of the dam is determined based on the time information of the target information segment and the second time period, including: determining the first time corresponding to the peak of the marked flow change curve in the second time period; determining the second time corresponding to the peak of the target information segment; and calculating the duration for the characteristic flow to arrive in front of the dam based on the difference between the second time and the first time.

[0013] In a second aspect, an embodiment of the present invention further discloses a device for calculating the time it takes for a reservoir characteristic flow to arrive in front of a dam, comprising: an acquisition module for acquiring measured incoming flow change information within a first time period, the measured incoming flow change information being used to characterize the incoming flow at different times; a first determination module for obtaining first outflow flow change information based on the measured incoming flow change information within the first time period; a superposition module for superimposing preset marked flow change information on the characteristic flow in the measured incoming flow change information to obtain characteristic incoming flow change information, the characteristic flow corresponding to a second time period, the second time period being included in the first time period; a second determination module for obtaining second outflow flow change information based on the characteristic incoming flow change information; a third determination module for determining the differential flow change information in front of the dam based on the difference between the second outflow flow change information and the first outflow flow change information; and a fourth determination module for determining the time it takes for the characteristic flow to arrive in front of the dam based on the marked flow change information and the differential flow change information in front of the dam.

[0014] In combination with the first aspect, in a possible implementation of the first aspect, the first determination module includes: an acquisition submodule, used to obtain water level information along the reservoir and water level change information in front of the dam within a first time period; the first determination submodule, used to input the measured inflow flow change information within the first time period, the water level information along the reservoir within the first time period, and the water level change information in front of the dam into a pre-established non-steady flow hydrodynamic model to obtain the first outflow flow change information.

[0015] In the third aspect, an embodiment of the present invention further discloses an electronic device, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes a method for calculating the time it takes for the characteristic flow of the reservoir to arrive in front of the dam as in the first aspect or any optional embodiment of the first aspect.

[0016] In a fourth aspect, an embodiment of the present invention further discloses a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for calculating the time it takes for the characteristic flow of a reservoir to arrive in front of the dam as in the first aspect or any optional embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a flowchart of a specific example of a method for calculating the time it takes for a reservoir characteristic flow to arrive in front of a dam in an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the measured incoming flow rate change information in an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of water level change information in front of the dam in an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of first outflow flow rate change information in an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the second outflow flow rate change information in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of a flow rate change curve in an embodiment of the present invention;

[0024] Figure 7 Schematic diagram of the variation curve of the differential flow in front of the dam in an embodiment of the present invention;

[0025] Figure 8 It is a principle block diagram of a specific example of a device for calculating the time taken for the characteristic flow of a reservoir to arrive in front of a dam in an embodiment of the present invention;

[0026] Fig. 9 FIG. 4 is a specific example diagram of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "first", "second" and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] The embodiment of the present invention discloses a method for calculating the time taken for the characteristic flow of a reservoir to reach the dam. Figure 1 As shown, the method comprises the following steps:

[0031] Step S101, obtaining the measured incoming flow rate change information in a first time period, where the measured incoming flow rate change information is used to characterize the incoming flow rate at different times.

[0032] For example, the first time period may be any time period for which the characteristic flow rate needs to be calculated before reaching the dam. The specific content of the first time period is not limited in the embodiment of the present application, and those skilled in the art may determine it according to the needs; the measured flow rate change information may be the flow rate value at different times in the first time period. In the embodiment of the present application, the schematic diagram of the flow rate change information in the first time period may be as follows: Figure 2 shown.

[0033] Step S102, obtaining first outflow flow rate change information according to the actually measured inflow flow rate change information in the first time period.

[0034] As an optional implementation of the present invention, step S102 includes:

[0035] The water level information along the reservoir and the water level change information in front of the dam in the first time period are obtained; the measured inflow flow change information in the first time period, the water level information along the reservoir and the water level change information in front of the dam in the first time period are input into a pre-established non-steady flow hydrodynamic model to obtain the first outflow flow change information.

[0036] Exemplarily, the water level information along the reservoir reflects the correlation between the distance from each position along the reservoir to the front of the dam and the water level at the corresponding position; the water level change information in front of the dam may be the change information of the water level in front of the dam over time measured by a water level measurement tool. The non-steady flow hydrodynamic model of the reservoir may be a finite difference method to solve the Saint-Venant equations and the one-dimensional convection-diffusion equation, which can be used for hydrodynamic and water quality simulation of a single river channel or a complex river network, and can handle non-steady flow. It provides models with boundary types such as water level, flow, water level-flow relationship, free outflow, sluice, weir, and customizable model output methods. The first outflow flow change information is the outflow flow change information corresponding to the measured inflow flow change information. In this embodiment of the present application, the water level change information in front of the dam may be as follows: Figure 3 As shown in the figure, the water level information along the reservoir is taken as the initial condition, the measured inflow flow change information and the water level change information in front of the dam are taken as the input conditions, and the reservoir non-steady flow hydrodynamic calculation model is solved to obtain the first outflow flow change information. The curve corresponding to the first outflow flow transformation information can be shown as Figure 4 shown.

[0037] Step S103, superimposing preset mark flow change information on the characteristic flow in the measured incoming flow change information to obtain characteristic incoming flow change information, the characteristic flow corresponds to the second time period, and the second time period is included in the first time period.

[0038] Exemplarily, the preset marked flow change information can be a flow change process determined by the actual incoming flow situation. The embodiment of the present application does not limit the specific content of the preset marked flow change information, and those skilled in the art can determine it according to needs. In the embodiment of the present application, the characteristic flow can be understood as a flood peak, and the duration of the marked flow is consistent with the time period corresponding to the characteristic flow, and the time interval is consistent with the incoming flow data interval, that is, the second time period corresponding to the characteristic flow is 36 hours, and the time period corresponding to the marked flow is also 36 hours. When the incoming flow has one data every 1 hour, the marked flow is also one data every 1 hour. The second time period can be Figure 2 For the period from August 12 to August 17, the characteristic flow in the measured flow change information can be as follows: Figure 2 The flow information represented by the flow change information corresponding to August 12 to August 17 in the measured flow change information shown in the figure can have a maximum value of the preset marked flow that is no greater than 10% of the minimum value of the measured flow. Figure 2The minimum flow rate from August 12 to August 17 is 15000m 3 / s, the maximum value of the preset mark flow can be 1000m 3 / s.

[0039] Step S104, obtaining second outflow flow change information according to the characteristic inflow flow change information.

[0040] For example, in the embodiment of the present application, the water level information along the reservoir can be used as the initial condition, and the characteristic inflow flow change information and the water level change information in front of the dam can be used as the input conditions to solve the non-steady flow hydrodynamic model of the reservoir, and obtain the second outflow flow change information corresponding to the characteristic inflow flow change information. In the embodiment of the present application, the schematic diagram of the second outflow flow change information can be as follows: Figure 5 shown.

[0041] Step S105, determining the difference flow change information before the dam according to the difference between the second outflow flow change information and the first outflow flow change information.

[0042] Exemplarily, in the embodiment of the present application, the second outflow flow change information and the first outflow flow change information are subtracted to obtain the dam front differential flow change information.

[0043] Step S106, determining the time it takes for the characteristic flow to arrive at the dam based on the marked flow change information and the differential flow change information before the dam. Exemplarily, the differential flow change information before the dam is compared with the marked flow change information, and determining the time it takes for the characteristic flow to arrive at the dam based on the comparison result.

[0044] The method for calculating the time it takes for the characteristic flow of a reservoir to arrive in front of the dam provided by the present invention is to obtain the characteristic incoming flow change information by superimposing the preset marked flow change information on the characteristic flow change information in the measured incoming flow change information, obtain the corresponding first outflow flow change information based on the measured incoming flow change information, obtain the corresponding second outflow flow change information based on the characteristic incoming flow change information, determine the differential flow change information in front of the dam based on the difference between the first outflow flow change information and the second outflow flow change information, and determine the time it takes for the characteristic flow to arrive in front of the dam based on the differential flow change information in front of the dam and the marked flow change information. The method of the present invention can calculate the time it takes for the characteristic flow to arrive in front of the dam when the water level and flow in front of the dam change arbitrarily, by superimposing the preset marked flow change information on the characteristic flow change information in the measured incoming flow change information, and then capturing the time when the marked flow appears, so as to effectively improve the accuracy of the calculation result of the time it takes for the characteristic flow to arrive in front of the dam, and has important value for formulating operation plans for large reservoirs, and for the smooth dispatch and safe operation of reservoirs.

[0045] As an optional embodiment of the present invention, the water level information along the reservoir in the first time period is obtained, including: inputting the measured inflow flow change information and the water level change information in front of the dam in the first time period into a pre-established constant flow hydrodynamic model to obtain the water level along the reservoir.

[0046] Exemplarily, the steady flow hydrodynamic model can be a model that uses the finite difference method to solve the Saint-Venant equations and the one-dimensional convection-diffusion equation, which can be used for hydrodynamic and water quality simulation of a single river channel or a complex river network, and can handle steady flow. In the embodiment of the present application, the measured inflow flow change information and the water level change information in front of the dam in the first period are used as input conditions to solve the steady flow hydrodynamic model of the reservoir and obtain the water level along the reservoir.

[0047] As an optional implementation of the present invention, step S106 includes:

[0048] In the differential flow change information in front of the dam, determine the target information segment corresponding to the marked flow change information; and determine the duration of the characteristic flow arriving in front of the dam based on the time information of the target information segment and the second time period.

[0049] Exemplarily, in an embodiment of the present application, the target information segment corresponding to the marked flow change information in the dam front differential flow change information can be determined based on the similarity of changes between the marked flow change information and the dam front differential flow change information.

[0050] As an optional implementation of the present invention, in the dam front differential flow change information, determining the target information segment corresponding to the marked flow change information includes:

[0051] Step a1: determining a marked flow change curve according to the marked flow change information, where the marked flow change curve is used to characterize the change information of the marked flow over time.

[0052] For example, in the embodiment of the present application, the flow change curve can be marked as follows: Figure 6 As shown by Figure 6 It can be clearly seen that the time period corresponding to the marked flow is from 00:00 on August 12 to 00:00 on August 17. The maximum value of the marked flow in this time period is 1000m 3 / s.

[0053] Step a2, determining a dam front differential flow change curve according to the dam front differential flow change information, the dam front differential flow change curve is used to characterize the dam front differential flow change information over time. For example, in the embodiment of the present application, the dam front differential flow change curve can be as follows: Figure 7 shown.

[0054] Step a3, determining the curve segment in the dam front differential flow change curve with the highest similarity to the marked flow change curve as the target information segment. Figure 7 The curve of differential flow before the dam and Figure 6 The target information segment with the highest similarity can be determined by marking the traffic change curve.

[0055] As an optional implementation manner of the present invention, determining the duration of the characteristic flow arriving at the dam according to the time information of the target information segment and the second time period includes:

[0056] Step b1, determining the first time corresponding to the peak value of the marked flow change curve in the second time period. Figure 6 In the marked traffic change curve shown, the first time corresponding to the marked traffic peak from 0:00 on August 12 to 0:00 on August 17 is 12:00 on August 14.

[0057] Step b2, determining a second time corresponding to the peak value of the target information segment. Figure 7 The second time corresponding to the flow peak in the target information segment in the dam front differential flow change curve is 11:00 on August 16.

[0058] Step b3, calculating the time it takes for the characteristic flow to arrive at the dam based on the difference between the second time and the first time.

[0059] Exemplarily, in an embodiment of the present application, based on the first time corresponding to the marked flow peak, 12:00 on August 14, and the second time corresponding to the flow peak in the target information segment, 11:00 on August 16, it can be determined that the propagation time of the marked flow into the reservoir is approximately 47 hours, that is, it takes about 47 hours for the characteristic flow to arrive at the dam.

[0060] The following is a specific example to illustrate the specific calculation process of a method for calculating the time it takes for a reservoir characteristic flow to arrive in front of a dam.

[0061] Example:

[0062] There is a river-type reservoir with a length of more than 600 kilometers. The flow process is known as Figure 2 , the water level process in front of the dam is as follows Figure 3 The current analysis is about the time when the flood peak from August 12 to August 17 will reach the dam. According to this method, the analysis period is first determined to be from 0:00 on August 12 to 0:00 on August 17. During this period, the minimum flow rate is 15000m 3 / s; determine the maximum value of the superimposed marked flow process is 1000m 3 / s, the starting time is 00:00 on August 12, and the ending time is 00:00 on August 17. The superimposed marked traffic process is as follows Figure 6 The outflow flow calculation results of the unsuperimposed marked flow process are shown in Figure 4 ; The outflow flow calculation results of the superimposed marker flow process are shown in Figure 5 ; The difference flow before the dam changes with time. Figure 7 By comparison Figure 6 and Figure 7 It can be seen that during the selected period, the peak time of the superimposed inflow occurred at 12:00 on August 14, and the time of the differential flow in front of the dam was 11:00 on August 16. The corresponding propagation time of the inflow flow during this period was about 47 hours.

[0063] The embodiment of the present invention also discloses a device for calculating the time taken for the characteristic flow of a reservoir to reach the dam. Figure 8 As shown, the device comprises:

[0064] The acquisition module 201 is used to obtain the measured incoming flow rate change information in the first time period. The measured incoming flow rate change information is used to characterize the incoming flow rate at different times. For details, please refer to the description of step S101 in the above embodiment and will not be repeated here.

[0065] The first determination module 202 is used to obtain first outflow flow change information according to the measured inflow flow change information in the first time period. The details are described in step S102 in the above embodiment and will not be repeated here.

[0066] The superposition module 203 is used to superimpose the preset mark flow change information on the characteristic flow in the measured incoming flow change information to obtain the characteristic incoming flow change information. The characteristic flow corresponds to the second time period, and the second time period is included in the first time period. For details, please refer to the description of step S103 in the above embodiment and will not be repeated here.

[0067] The second determining module 204 is used to obtain the second outflow flow change information according to the characteristic inflow flow change information. The details are described in step S104 in the above embodiment and will not be repeated here.

[0068] The third determination module 205 is used to determine the difference flow change information before the dam according to the difference between the second outflow flow change information and the first outflow flow change information. The details are described in step S105 in the above embodiment and will not be repeated here.

[0069] The fourth determination module 206 is used to determine the duration of the characteristic flow arriving in front of the dam based on the marked flow change information and the difference flow change information in front of the dam. The details are described in step S106 in the above embodiment and will not be repeated here.

[0070] The device for calculating the time taken for the characteristic flow of a reservoir to arrive in front of the dam provided by the present invention obtains characteristic incoming flow change information by superimposing preset marked flow change information on characteristic flow change information in measured incoming flow change information, obtains corresponding first outflow flow change information based on measured incoming flow change information, obtains corresponding second outflow flow change information based on characteristic incoming flow change information, determines differential flow change information in front of the dam based on the difference between the first outflow flow change information and the second outflow flow change information, and determines the time taken for the characteristic flow to arrive in front of the dam based on the differential flow change information in front of the dam and the marked flow change information. The method of the present invention superimposes preset marked flow change information on characteristic flow change information in measured incoming flow change information, and then captures the time when the marked flow appears, and can calculate the time taken for the characteristic flow to arrive in front of the dam when the water level and flow in front of the dam change arbitrarily, effectively improving the accuracy of the calculation result of the time taken for the characteristic flow to arrive in front of the dam, which is of great value for formulating operation plans for large reservoirs, and for the smooth dispatch and safe operation of reservoirs.

[0071] As an optional embodiment of the present invention, the first determination module includes: an acquisition submodule, used to obtain the water level information along the reservoir in a first time period and the water level change information in front of the dam; the first determination submodule, used to input the measured inflow flow change information in the first time period, the water level information along the reservoir in the first time period and the water level change information in front of the dam into a pre-established non-steady flow hydrodynamic model to obtain the first outflow flow change information.

[0072] As an optional embodiment of the present invention, the acquisition submodule includes: a second determination submodule, which is used to input the measured inflow flow change information and the water level change information in front of the dam during the first time period into a pre-established constant flow hydrodynamic model to obtain the water level along the reservoir.

[0073] As an optional embodiment of the present invention, the fourth determination module includes: a third determination submodule, used to determine the target information segment corresponding to the marked flow change information in the differential flow change information in front of the dam; a fourth determination submodule, used to determine the duration of the characteristic flow arriving in front of the dam based on the time information of the target information segment and the second time period.

[0074] As an optional embodiment of the present invention, the third determination submodule includes: a fifth determination submodule, used to determine a marked flow change curve based on the marked flow change information, the marked flow change curve is used to characterize the change information of the marked flow over time; a sixth determination submodule, used to determine a dam-front differential flow change curve based on the dam-front differential flow change information, the dam-front differential flow change curve is used to characterize the change information of the dam-front differential flow over time; a seventh determination submodule, used to determine the curve segment in the dam-front differential flow change curve that has the highest similarity with the marked flow change curve as the target information segment.

[0075] As an optional embodiment of the present invention, the fourth determination submodule includes: an eighth determination submodule, used to determine the first time corresponding to the peak of the marked flow change curve in the second time period; a ninth determination submodule, used to determine the second time corresponding to the peak of the target information segment; and a calculation submodule, used to calculate the duration of the characteristic flow arriving at the dam based on the difference between the second time and the first time.

[0076] The embodiment of the present invention further provides an electronic device, such as Fig. 9 As shown, the electronic device may include a processor 401 and a memory 402, wherein the processor 401 and the memory 402 may be connected via a bus or other means. Fig. 9 The example of connecting through bus is taken in the following.

[0077] The processor 401 may be a central processing unit (CPU). The processor 401 may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0078] The memory 402, as a non-transient computer-readable storage medium, can be used to store non-transient software programs, non-transient computer executable programs and modules, such as program instructions / modules corresponding to the method for calculating the time it takes for the characteristic flow of a reservoir to arrive in front of the dam in the embodiment of the present invention. The processor 401 executes various functional applications and data processing of the processor by running the non-transient software programs, instructions and modules stored in the memory 402, that is, the method for calculating the time it takes for the characteristic flow of a reservoir to arrive in front of the dam in the above method embodiment is implemented.

[0079] The memory 402 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required by at least one function; the data storage area may store data created by the processor 401, etc. In addition, the memory 402 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 402 may optionally include a memory remotely arranged relative to the processor 401, and these remote memories may be connected to the processor 401 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0080] The one or more modules are stored in the memory 402, and when executed by the processor 401, the following is performed: Figure 1 The calculation method of the time taken for the reservoir characteristic flow to arrive in front of the dam in the illustrated embodiment.

[0081] For details of the above electronic equipment, please refer to Figure 1 The corresponding related descriptions and effects in the illustrated embodiments can be understood and will not be repeated here.

[0082] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, the storage medium can be a disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD) or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above-mentioned types of memory.

[0083] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for calculating the time it takes for a reservoir characteristic flow to reach the dam, characterized in that: include: Acquire the measured incoming flow rate change information in the first time period, wherein the measured incoming flow rate change information is used to characterize the incoming flow rate at different times; Obtaining first outflow flow rate change information according to the measured inflow flow rate change information in the first time period; Superimposing preset mark flow change information on the characteristic flow in the measured incoming flow change information to obtain characteristic incoming flow change information, wherein the characteristic flow corresponds to a second time period, and the second time period is included in the first time period; Obtaining second outflow flow rate change information according to the characteristic inflow flow rate change information; Determine the dam front differential flow change information according to the difference between the second outflow flow change information and the first outflow flow change information; Determine the time it takes for the characteristic flow to arrive in front of the dam based on the marked flow change information and the difference flow change information in front of the dam; The obtaining first outflow flow rate change information according to the measured inflow flow rate change information in the first time period includes: Obtain the water level information along the reservoir and the water level change information in front of the dam in the first period; The measured inflow flow change information during the first time period, the reservoir water level information along the first time period and the water level change information in front of the dam are input into a pre-established non-steady flow hydrodynamic model to obtain the first outflow flow change information.

2. The method according to claim 1, characterized in that The step of obtaining the water level information along the reservoir in the first time period includes: The measured inflow flow change information and the water level change information in front of the dam during the first time period are input into a pre-established steady flow hydrodynamic model to obtain the water level along the reservoir.

3. The method according to claim 1, characterized in that: The determining of the time for the characteristic flow to arrive in front of the dam based on the marked flow change information and the dam front differential flow change information includes: In the dam front differential flow change information, determining a target information segment corresponding to the marked flow change information; The duration for the characteristic flow to arrive at the dam is determined based on the time information of the target information segment and the second time period.

4. The method according to claim 3, characterized in that In the dam front differential flow change information, determining a target information segment corresponding to the marked flow change information includes: Determine a marked flow change curve according to the marked flow change information, wherein the marked flow change curve is used to characterize the change information of the marked flow over time; Determine a dam front differential flow change curve according to the dam front differential flow change information, wherein the dam front differential flow change curve is used to characterize the dam front differential flow change information over time; The curve segment in the dam front differential flow change curve that has the highest similarity to the marked flow change curve is determined as the target information segment.

5. The method according to claim 4, characterized in that Determining the duration of the characteristic flow arriving at the dam according to the time information of the target information segment and the second time period includes: Determine a first time corresponding to a peak value of the marked flow change curve within the second time period; Determine a second time corresponding to a peak value of the target information segment; The duration of the characteristic flow arriving at the dam is calculated based on the difference between the second time and the first time.

6. A device for calculating the time it takes for a reservoir characteristic flow to reach a dam, characterized in that: include: An acquisition module, used to acquire the measured incoming flow rate change information within the first time period, wherein the measured incoming flow rate change information is used to characterize the incoming flow rate at different times; A first determining module, configured to obtain first outflow flow rate change information according to actually measured inflow flow rate change information within a first time period; A superposition module, used for superimposing preset mark flow change information on the characteristic flow in the measured incoming flow change information to obtain characteristic incoming flow change information, wherein the characteristic flow corresponds to a second time period, and the second time period is included in the first time period; A second determining module is used to obtain second outflow flow change information according to the characteristic inflow flow change information; A third determining module is used to determine the dam front differential flow change information according to the difference between the second outflow flow change information and the first outflow flow change information; A fourth determination module is used to determine the duration of the characteristic flow arriving in front of the dam based on the marked flow change information and the difference flow change information in front of the dam; The first determining module includes: The acquisition submodule is used to obtain the water level information along the reservoir and the water level change information in front of the dam in the first period; The first determination submodule is used to input the measured inflow flow change information during the first time period, the reservoir water level information along the first time period, and the water level change information in front of the dam into a pre-established non-steady flow hydrodynamic model to obtain the first outflow flow change information.

7. An electronic device, characterized in that: include: at least one processor; And a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the method for calculating the time it takes for the characteristic flow of the reservoir to arrive in front of the dam as described in any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for calculating the time it takes for the characteristic flow of a reservoir to reach the dam is implemented as described in any one of claims 1 to 5.

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