CN118133700A - Real-time calculation method for hydraulic transition process of diversion and regulation engineering - Google Patents
Real-time calculation method for hydraulic transition process of diversion and regulation engineering Download PDFInfo
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Abstract
The invention provides a real-time calculation method for a hydraulic transition process of a water diversion and regulation project, which is used for regulating and controlling a numerical simulation model of the hydraulic transition process of a water delivery system of the water diversion and regulation project, monitoring valve actions in real time in the whole process, and reading the opening of a valve at each fixed moment; the input boundary of the hydraulic transition process numerical simulation model is the valve opening which is monitored and read at each moment, and the valve opening regulating and controlling process is input by external data. According to the invention, through setting the adjustable parameters of the calculation model, jointly calling with the measured data and determining the calculation step, the real-time calculation of the hydraulic transition process of the diversion and regulation engineering is realized, and the difficulty of the real-time calculation of the hydraulic transition process of the diversion and regulation engineering is solved.
Description
Technical Field
The invention relates to the field of water conservancy and hydropower engineering, in particular to a real-time calculation method for a real-time hydraulic transition process of water supply, diversion and regulation engineering and the like.
Background
Along with the development of digital information technology, the digital demands of hydraulic and hydroelectric engineering are strong. In the water supply engineering and the diversion and regulation engineering, the numerical requirements are based on real-time boundary conditions and scheduling requirements, real-time water quantity scheduling analysis is carried out, real-time scheduling rules are determined, and based on scheduling analysis results, the pressure change of the hydraulic transition process in the scheduling process is predicted in real-time simulation, and whether a water hammer exceeds the design standard of a pipeline or not is judged, and whether the hydraulic safety problem of the scheduling process exists or not is judged. At present, digital scheduling of many water guiding and supplying projects does not achieve real-time calculation, but directly searches for a pre-designed scheme to conduct hydraulic transition process preview of a scheduling process when a water transferring event really occurs through presetting various scheduling schemes. However, since the boundary conditions are not consistent with the preset conditions in the actual operation process of the engineering, the preset scheduling scheme has a certain difference from the actual operation, and the actual digital operation scheduling cannot be achieved. And the action rule of the valve in the water delivery system is not regulated and controlled according to the preset action rule due to the action of factors such as water thrust, and the generated water hammer is greatly deviated from the preset action rule, so that the influence on the safety of the structure can not be accurately judged, and the reliability and safety regulation and control of the engineering can be influenced.
Disclosure of Invention
The invention aims to provide a real-time calculation method for the hydraulic transition process of a water diversion and regulation project, aiming at the problem that the water diversion and regulation project in the prior art cannot realize the preview of the real-time hydraulic transition process. The technical scheme of the invention is as follows:
the real-time calculation method for the hydraulic transition process of the diversion and regulation project is characterized by comprising the following steps: the real-time calculation method regulates and controls a hydraulic transition process numerical simulation model of the water delivery system of the water diversion project, the whole process of valve action can be monitored and read in real time, the monitored and read data are the opening degree of the valve at each fixed moment, the hydraulic transition process numerical simulation model corresponds to the water diversion project, the water diversion valve or other valves with the water diversion function in the system are used for scheduling control, and the hydraulic transition process numerical simulation model is combined with the arrangement pattern of the water delivery system of the water diversion project and is deduced and established based on a fluid motion equation and a continuity equation.
The input variable boundary of the hydraulic transition process model is corresponding to the opening change of the regulating valve, and the valve opening regulating process is input by external data.
The real-time calculation method for the hydraulic transition process of the diversion and regulation project comprises the following steps:
1) And in the delta T period of [0, T 1 ], carrying a preset valve action rule tau=f (tau, T) into a hydraulic transient process numerical simulation model to calculate the transient pressure and flow at the moment T 1, and simultaneously obtaining the calculated valve opening tau 1,1',τ2,1',τ3,1',…τm,i'…,τn,1', and recording the physical clock time at the moment of completion of calculation as T t1. Wherein, deltaT is the sampling time period of the valve opening, namely T 1 =0+deltaT, and 0 is the real-time calculation time for starting the hydraulic transition process;
2) Waiting for the physical clock time T=T 1, reading the moment T 1, wherein the subscript m of the opening tau 1,1,τ2,1,τ3,1,…τm,i…,τn,1,τm,i of the valve represents the valve number, and the subscript i represents the moment;
3) And judging the valve actual opening value obtained in the step 2) and the valve opening calculated value obtained in the step 1). If the opening degree is inconsistent, skipping to the step 4), and if the opening degree is consistent, skipping to the step 5);
4) According to the action rule of the valve Recalculating the hydraulic transition transient value in the delta T period of the last [ T i-1,Ti ];
5) Calculating the transient value of the hydraulic transition process in the next delta T period, namely, in the [ T i,Ti+1 ] delta T period, according to the valve action rule of the previous period Carrying out a hydraulic transition process numerical simulation model to calculate transient pressure and flow at the moment T i+1, and simultaneously obtaining calculated valve opening tau 1,i+1',τ2,i+1',τ3,i+1',…τm,i+1'…,τn,i+1', and recording the physical clock time at the moment of completion of calculation as T ti+1;
6) Waiting for the physical clock time T=T i+1, reading the moment T i+1, and opening tau 1,i+1,τ2,i+1,τ3,i+1,…τm,i+1…,τn,i+1 of the valve;
7) And judging the valve actual opening value obtained in the step 5) and the valve opening calculated value obtained in the step 6). If the opening degree is inconsistent, jumping to the step 4), and if the opening degree is consistent, jumping to the step 8), until the real-time calculation is finished;
8) Judging whether the read valve opening is equal to the set valve opening value, if the read valve opening is smaller than the set valve opening, executing the step 5), and calculating the transition process parameter of the next time period; and if the valve opening is equal to the set valve opening, the real-time calculation is finished.
The valve opening sampling time period delta T of the real-time calculation method meets the following conditions:
ΔT＝nΔt
wherein n is a positive integer greater than or equal to 1, and the calculation time step of the delta t hydraulic transition process numerical simulation model. That is, the hydraulic transition numerical simulation model can perform n times of cyclic calculation in the delta T time period.
The valve opening sampling time period delta T of the real-time calculation method meets the following conditions:
ΔT≥Ts＝Tti+1-Tti
Wherein T s is the computer simulation physical time required by the simulation calculation of the hydraulic transition process in the delta T time period; i.e. the physical time taken for the computation should be less than the actual clock time.
According to a second aspect of the object of the present invention, there is provided a non-transitory computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the above-mentioned real-time computing method.
According to a third aspect of the object of the invention, an electronic device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the above-mentioned real-time calculation method when executing the program.
The invention provides a real-time calculation method for the hydraulic transition process of a diversion and transfer project, which realizes the real-time calculation of the hydraulic transition process of the diversion and transfer project by setting adjustable parameters of a calculation model, jointly calling with measured data and determining calculation steps, and solves the difficulty of the real-time calculation of the hydraulic transition process of the diversion and transfer project.
Drawings
FIG. 1 is a flow chart of a method for calculating the hydraulic transition process of the diversion and diversion project in real time.
Fig. 2 is a schematic layout of a water delivery system according to an embodiment.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and detailed description:
FIG. 1 is a flow chart of a method for calculating the hydraulic transition process of the diversion and diversion project in real time.
The real-time calculation method for the hydraulic transition process of the diversion and regulation project comprises the following steps:
1) And in the delta T period of [0, T 1 ], carrying a preset valve action rule tau=f (tau, T) into a hydraulic transient process numerical simulation model to calculate the transient pressure and flow at the moment T 1, and simultaneously obtaining the calculated valve opening tau 1,1',τ2,1',τ3,1',…τm,i'…,τn,1', and recording the physical clock time at the moment of completion of calculation as T t1. Wherein, deltaT is the sampling time period of the valve opening, namely T 1 =0+deltaT, and 0 is the real-time calculation time for starting the hydraulic transition process;
2) Waiting for T t1＝T1, reading the moment T 1, wherein the subscript m of the opening tau 1,1,τ2,1,τ3,1,…τm,i…,τn,1,τm,i of the valve represents the valve number, and the subscript i represents the moment;
3) And judging the valve actual opening value obtained in the step 2) and the valve opening calculated value obtained in the step 1). If the opening degree is inconsistent, skipping to the step 4), and if the opening degree is consistent, skipping to the step 5);
4) According to the action rule of the valve Recalculating the hydraulic transition transient value in the delta T period of the last [ T i-1,Ti ];
5) Calculating the transient value of the hydraulic transition process in the next delta T period, namely, in the [ T i,Ti+1 ] delta T period, according to the valve action rule of the previous period Carrying out a hydraulic transition process numerical simulation model to calculate transient pressure and flow at the moment T i+1, and simultaneously obtaining calculated valve opening tau 1,i+1',τ2,i+1',τ3,i+1',…τm,i+1'…,τn,i+1', and recording the physical clock time at the moment of completion of calculation as T ti+1;
6) Waiting for T ti+1＝Ti+1, reading the moment T i+1, and opening tau 1,i+1,τ2,i+1,τ3,i+1,…τm,i+1…,τn,i+1 of the valve;
7) And judging the valve actual opening value obtained in the step 5) and the valve opening calculated value obtained in the step 6). If the opening degree is inconsistent, jumping to the step 4), and if the opening degree is consistent, jumping to the step 5), until the real-time calculation is finished.
The method is described in the embodiment by using a specific engineering case:
1. The water diversion and regulation engineering is characterized in that one upper water tank 1 is used for diversion and regulation of water to two lower water tanks 2, the water diversion flow rates of the two lower water tanks 2 are respectively controlled by one flow regulation valve 4 and 5, a hydraulic transition process calculation model is built based on the arrangement pattern of the water diversion and regulation engineering, and the hydraulic transition process is calculated in real time.
2. The time step Δt=0.01 s calculated during the hydraulic transition, and the valve opening sampling time period Δt=1 s, i.e., Δt=100 Δt.
3. And (3) starting the hydraulic transition process real-time calculation, executing the step (1), opening the valve according to a preset action rule of 1/120, starting the hydraulic transition process calculation of [0,1s ], calculating the pressure and the flow at the moment of T 1 =1s, and simultaneously calculating the valve opening at the moment of 1s to be 0.302,0.302 respectively. This calculation only takes the actual clock time T s =0.02 s, i.e. T t1 =0.02 s, which is smaller than Δt, and then waits.
4. Step 2) is performed, waiting for an actual physical time T t1＝T1 =1s, at which time the actual valve opening is read as 0.302,0.302.
5. And judging the valve actual opening value obtained in the step 2) and the valve opening calculated value obtained in the step 1). And (5) executing the step (5) when the opening degree of the valve is consistent with that of the valve.
6. Starting the hydraulic transition process calculation of [1s,2s ], and the valve is operated according to the previous time periodThe operation rule of (1) is opened, the pressure and the flow at the moment of T 2 = 2s are calculated, and meanwhile, the valve opening at the moment of 2s is calculated to be 0.305,0.305 respectively. This calculation only takes the actual clock time T s =0.01 s, which is smaller than Δt, i.e. T t2 =1.01 s, and then waits.
7. Step 6) is performed, waiting for an actual physical time T t2＝T2 =2s, at which time the actual valve opening is read as 0.305,0.305.
8. And judging the valve actual opening value obtained in the step 6) and the valve opening calculated value obtained in the step 5). The opening degrees of the two valves are consistent. 9. Judging whether the valve opening reaches a set valve opening value, if not, calculating the next period, and sequentially executing the steps 5) to 8); and if the valve opening value is equal to the set valve opening value, the real-time calculation is finished.
From the description of the embodiments above, it will be apparent to those skilled in the art that the facility of the present invention may be implemented by means of software plus necessary general hardware platforms. Embodiments of the invention may be implemented using existing processors, or by special purpose processors used for this or other purposes for appropriate systems, or by hardwired systems. Embodiments of the invention also include non-transitory computer-readable storage media including machine-readable media for carrying or having machine-executable instructions or data structures stored thereon; such machine-readable media can be any available media that can be accessed by a general purpose or special purpose computer or other machine with a processor. Such machine-readable media may include, for example, RAM, ROM, EPROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of machine-executable instructions or data structures and that can be accessed by a general purpose or special purpose computer or other machine with a processor. When information is transferred or provided over a network or another communications connection (either hardwired, wireless, or a combination of hardwired or wireless) to a machine, the connection is also considered to be a machine-readable medium.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.
Claims (5)
1. The real-time calculation method for the hydraulic transition process of the diversion and regulation project is characterized by comprising the following steps of: the real-time calculation method regulates and controls a hydraulic transition process numerical simulation model of the water delivery system of the diversion and regulation project, monitors valve actions in real time in the whole process, and reads the opening of the valve at each fixed moment; the input boundary of the hydraulic transition process numerical simulation model is the valve opening which is monitored and read at each moment, and the valve opening regulation and control process is input by external data;
The real-time calculation method for the hydraulic transition process of the diversion and adjustment project comprises the following steps:
1) In the period of delta T of [0, T 1 ], carrying a preset valve action rule tau=f (tau, T) into a hydraulic transition process numerical simulation model to calculate transient pressure and flow at the moment T 1, and simultaneously obtaining a calculated valve opening tau 1,1',τ2,1',τ3,1',…τm,i'…,τn,1', and recording the physical clock time at the moment of calculation completion as T t1, wherein delta T is a valve opening sampling time period, namely T 1 =0+delta T, and 0 is the moment of starting the hydraulic transition process to calculate in real time;
2) Waiting for the physical clock time T=T 1, reading the moment T 1, wherein the subscript m of the opening tau 1,1,τ2,1,τ3,1,…τm,i…,τn,1,τm,i of the valve represents the valve number, and the subscript i represents the moment;
3) And judging the valve actual opening value obtained in the step 2) and the valve opening calculated value obtained in the step 1). If the opening degree is inconsistent, skipping to the step 4), and if the opening degree is consistent, skipping to the step 5);
4) According to the action rule of the valve Recalculating the hydraulic transition transient value in the delta T period of the last [ T i-1,Ti ];
5) Calculating the transient value of the hydraulic transition process in the next delta T period, namely, in the delta T period of [ T i,Ti+1 ], according to the valve action rule of the previous period Carrying out a hydraulic transition process numerical simulation model to calculate transient pressure and flow at the moment T i+1, and simultaneously obtaining calculated valve opening tau 1,i+1',τ2,i+1',τ3,i+1',…τm,i+1'…,τn,i+1', and recording the physical clock time at the moment of completion of calculation as T ti+1;
6) Waiting for the physical clock time T=T i+1 to read the moment T i+1, and opening tau 1,i+1,τ2,i+1,τ3,i+1,…τm,i+1…,τn,i+1 of the valve;
7) And judging the valve actual opening value obtained in the step 5) and the valve opening calculated value obtained in the step 6). If the opening degree is inconsistent, skipping to the step 4), and if the opening degree is consistent, skipping to the step 8);
8) Judging whether the read valve opening is equal to the set valve opening value, if the read valve opening is smaller than the set valve opening, executing the step 5), and calculating the transition process parameter of the next time period; and if the valve opening is equal to the set valve opening, finishing the real-time calculation.
2. The real-time computing method of claim 1, wherein: the valve opening sampling time period deltat satisfies the following conditions:
ΔT＝nΔt
wherein n is a positive integer greater than or equal to 1, and the calculation time step of the delta t hydraulic transition process numerical simulation model. That is, the hydraulic transition numerical simulation model can perform n times of cyclic calculation in the delta T time period.
3. The real-time computing method of claim 1, wherein: the valve opening sampling time period deltat satisfies the following conditions:
ΔT≥Ts＝Tti+1-Tti
Wherein T s is the computer simulation physical time required by the simulation calculation of the hydraulic transition process in the delta T time period; i.e. the actual physical time T s required for the transient simulation to calculate the sampling period at time should be smaller than the actual sampling period.
4. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the real-time computing method of claim 1,2 or 3.
5. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the real-time computing method of claim 1,2 or 3 when the program is executed.
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| CN202311780148.7A CN118133700A (en) | 2023-12-22 | 2023-12-22 | Real-time calculation method for hydraulic transition process of diversion and regulation engineering |
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| CN202311780148.7A CN118133700A (en) | 2023-12-22 | 2023-12-22 | Real-time calculation method for hydraulic transition process of diversion and regulation engineering |
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