CN116048142A - Water supply scheduling method - Google Patents
Water supply scheduling method Download PDFInfo
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- CN116048142A CN116048142A CN202310148397.8A CN202310148397A CN116048142A CN 116048142 A CN116048142 A CN 116048142A CN 202310148397 A CN202310148397 A CN 202310148397A CN 116048142 A CN116048142 A CN 116048142A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
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Abstract
The invention provides a water supply scheduling method which is suitable for water supply scheduling of a reservoir, wherein the reservoir comprises an ecological drainage device and a water supply gate, the ecological drainage device and the water supply gate are both provided with an automatic control system, the reservoir obtains the reservoir water level at the end of each day by combining the current reservoir water level and the predicted hourly flow according to the predicted water supply flow demand and the ecological flow design value at the beginning of each day and corrects incoming flows according to the hourly operation result when the reservoir is scheduled to operate so as to realize scientific and reasonable scheduling of the incoming flows and the water supply demand.
Description
Technical Field
The invention relates to the field of hydraulic engineering, in particular to a water supply scheduling method.
Background
The reservoir can redistribute natural incoming flow, through building the reservoir, the regulation performance of the reservoir can be utilized, the high-efficiency and reasonable utilization of water resources is realized, the functions born by the reservoir can be divided into flood control function, water supply function, irrigation function, power generation function and the like, meanwhile, the ecological function born by the reservoir is considered, the ecological flow device is also generally built in the reservoir, the ecological flow supply to the downstream river channel is realized, and the ecological demand of the downstream river channel is ensured.
For reservoirs with water supply functions, a scientific and reasonable scheduling mode is needed, so that reasonable utilization of the reservoirs and water supply is guaranteed, daily scheduling is generally adopted for the reservoirs and the water supply according to scheduling operation requirements, reasonable scheduling is carried out according to daily scheduling plans, and at present, the water supply scheduling lacks of the reasonable operation mode, water resources are wasted, and the scheduling operation requirements of the reservoirs cannot be guaranteed.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a water supply scheduling method for realizing reasonable and scientific scheduling of reservoir water supply.
The invention provides a water supply scheduling method which is suitable for water supply scheduling of a reservoir, wherein the reservoir comprises an ecological drainage device and a water supply gate, the ecological drainage device is a ecological gate, the gate opening of the ecological gate is adjustable, the ecological gate is provided with an automatic control system, and the automatic control system can adjust the opening of the ecological gate according to the reservoir water level of the reservoir so as to ensure that the drainage flow of the ecological gate is Qs, wherein Qs is an ecological flow design value of the reservoir; the water supply gate is provided with a gate opening monitoring device and an automatic control device, the reservoir is provided with a reservoir water level monitoring device, the water supply gate is connected with a water supply system, the water supply system allows water supply flow to fluctuate, the reservoir is provided with a runoff forecasting system for forecasting water supply flow of the reservoir from hour to hour, and the water supply system is provided with a water supply forecasting system for forecasting daily water supply demand flow Qx, and is characterized in that: the water supply scheduling method is suitable for the condition of no rainfall of the reservoir, and comprises the following steps:
s1: obtaining daily water supply demand flow Qx and daily water supply quantity Wx according to the forecast of a water supply forecast system at the beginning of a daily period, obtaining hour-by-hour inflow Qi and daily water supply quantity Wr of a reservoir according to the forecast of a runoff forecast system, calculating daily ecological water quantity Ws of the reservoir according to an ecological flow design value Qs of the reservoir, calculating daily reservoir water quantity Wc of the reservoir according to the daily water supply quantity Wx, the daily water supply quantity Wr and the daily ecological water quantity Ws, obtaining reservoir water level H1 at the current moment, calculating current reservoir capacity V1 of the reservoir according to a water level reservoir capacity curve, calculating reservoir capacity V2 at the daily end moment of the reservoir according to the current reservoir capacity V1 and the daily reservoir water quantity Wc, and then calculating reservoir water level H2 at the daily end moment of the reservoir according to the water level reservoir capacity curve;
s2: the daily water supply scheduling is carried out from the beginning of the daily moment, the opening of the water supply gate is adjusted by utilizing an automatic control device of the water supply gate according to the daily water supply demand flow Qx in combination with the current reservoir water level, so that the water flow of the water supply gate is equal to the daily water supply demand flow Qx, and the reservoir water level Hi at the current moment is obtained after the water supply gate operates for 1 hour;
s3: calculating the actual incoming flow rate Qk of the last hour according to the current reservoir water level Hi and the reservoir water level H1 before the last hour by combining the water balance of the reservoir, calculating a deviation coefficient K according to the actual incoming flow rate Qk of the last hour and the incoming flow rate Qik of the last hour obtained by forecasting of the runoff forecasting system, wherein the deviation coefficient K=Qk/Qik is used for correcting the incoming flow rate from the current moment obtained by forecasting of the runoff forecasting system to the daily end moment, and the correction is that the incoming flow rate from the current moment obtained by forecasting of the runoff forecasting system to the daily end moment in the step S1 is multiplied by the deviation coefficient K to obtain the incoming flow rate Qip from the current moment of forecasting to the daily end moment;
s4: according to the reservoir water level Hi obtained in the step S3 and the predicted inflow Qip from the current moment to the daily end moment, the reservoir water level H2 at the daily end moment is taken as a control condition, and the ecological flow design value Qs is combined to perform water balance calculation of the reservoir, so that the average water supply flow Qxi of the reservoir from hour to hour is calculated;
s5: according to the average water supply flow Qxi of the reservoirs per hour obtained in the step S4, the opening of the water supply gate is adjusted by utilizing an automatic control device of the water supply gate in combination with the current reservoir water level Hi, so that the water flow of the water supply gate is equal to the water supply flow Qxi, scheduling for the second hour is carried out, and after the second hour is finished, the reservoir water level Hii at the current moment is obtained;
s6: repeating the steps S3-S5 until the operation is carried out for one hour before the daily ending time, obtaining the average water supply flow Qxii of the hour, and adjusting the opening of the water supply gate by utilizing the automatic control device of the water supply gate according to the average water supply flow Qxii and the current reservoir water level in one hour before the daily ending time to enable the water flow of the water supply gate to be equal to the water supply flow Qxii.
Preferably, the daily period in S1 is initially a time scheduled by the daily reservoir dispatching plan, and the period is initially zero or eight am each day.
Preferably, the water supply gates are all provided with opening-water level-flow curves, and the flow value of the water supply gate can be calculated according to any opening and water level or the opening value of the water supply gate can be calculated according to any water level and flow value.
Preferably, the water balance of the reservoir is calculated as the water supply amount and the water output amount of a certain period of the reservoir, wherein the water output amount comprises the water supply amount and the ecological water amount, the reservoir water storage amount of the certain period is calculated, the reservoir capacity at the beginning of the period is utilized to be added with the reservoir water storage amount of the period, the reservoir capacity at the end of the period is obtained, and the conversion between the reservoir capacity and the water level utilizes a water level reservoir capacity curve.
The working principle of the invention is as follows:
the invention is suitable for a water supply reservoir, wherein the reservoir adopts a daily scheduling mode, i.e. a daily scheduling plan is formulated, scheduling is completed according to the plan, daily rolling is performed for planning, the reservoir is provided with an ecological flow discharge device, the ecological flow discharge device is kept at constant flow discharge, i.e. the discharge flow of an ecological gate is ensured to be equal to an ecological flow design value, the method is ensured to be through the adjustment of the opening degree of the ecological gate, thereby ensuring the constant discharge of the ecological flow, and avoiding unreasonable utilization of water resources caused by insufficient or excessive discharge of the ecological flow.
The water supply system is provided with a water supply forecasting system for forecasting daily water supply demand flow Qx, wherein the water supply forecasting system can be determined according to factors such as user water supply demand, and the water supply system is provided with a regulating device, so that when the water supply flow of the water supply reservoir fluctuates, the water supply guarantee rate is not influenced, the water supply system is provided with a runoff forecasting system, the runoff forecasting system can forecast an hour-by-hour reservoir inflow process, and the reservoir inflow process is relatively stable when no rainfall exists, so that the water supply forecasting system and the runoff forecasting system can forecast once at the moment of each day, the water supply forecasting system obtains daily water supply demand flow Qx which is a daily average value, the runoff forecasting system obtains daily inflow per hour, and the water quantity value of each day can be obtained by multiplying the flow value by the time period number of each day.
In the scheduling, a scheduling plan is initially established at the daily moment, particularly, the base water level at the end of the daily moment is established according to the daily water supply demand flow Qx, the ecological flow design value, the forecast diameter flow value and the base water level value at the beginning of the daily moment, the scheduling plan is formed, and after approval by a reservoir management department or a superior scheduling department, the daily scheduling plan is formed, and in the daily scheduling, the approved base water level at the end of the daily moment is used as a scheduling target for scheduling.
The method comprises the steps of carrying out hour-by-hour rolling scheduling, adjusting a water supply gate to carry out scheduling according to a water supply quantity value initially formulated in an hour period, calculating actual incoming flow according to reservoir water level change after scheduling for one hour, carrying out deviation coefficient calculation according to actual incoming flow and forecast incoming flow in the hour, carrying out deviation correction on a runoff forecast value in a non-occurrence period of the day according to the deviation coefficient, wherein each correction adopts deviation of the actual value and the forecast value in the last hour as a correction basis, when the correction is carried out, the actual value is obtained through water balance calculation of a reservoir, the forecast value is obtained through the forecast of a runoff forecast system carried out once in the day, namely, the incoming flow Qik in the last hour, which is obtained through the forecast of the runoff forecast system in the step S1, is combined with the current reservoir water level, the final reservoir water level in the day time and the design value of ecological flow according to the corrected runoff forecast value in the non-occurrence period of the day, carrying out correction of the water supply quantity of the water supply is the water supply average value in the non-occurrence period of the day, and rolling in the scheduling mode until the day scheduling is finished.
In a non-rainfall period, the runoff process is relatively stable, so that the actual incoming flow of the previous hour is calculated after each hour of scheduling is finished, the actual incoming flow is compared with the incoming flow of a forecasting system, the deviation coefficient is corrected, the runoff forecasting value can be corrected and adjusted according to the actual value through rolling correction, the runoff forecasting precision is ensured, and the real-time rolling adjustment is carried out according to the daily scheduling plan.
The invention has the advantages that:
the invention provides a water supply scheduling method which is suitable for water supply scheduling of a reservoir, wherein the reservoir comprises an ecological drainage device and a water supply gate, the ecological drainage device and the water supply gate are both provided with an automatic control system, the reservoir obtains the reservoir water level at the end of each day by combining the current reservoir water level and the predicted hourly flow according to the predicted water supply flow demand and the ecological flow design value at the beginning of each day and corrects incoming flows according to the hourly operation result when the reservoir is scheduled to operate so as to realize scientific and reasonable scheduling of the incoming flows and the water supply demand.
The specific embodiment is as follows:
the present invention will be specifically explained below.
The invention provides a water supply scheduling method which is suitable for water supply scheduling of a reservoir, wherein the reservoir comprises an ecological drainage device and a water supply gate, the ecological drainage device is a ecological gate, the gate opening of the ecological gate is adjustable, the ecological gate is provided with an automatic control system, and the automatic control system can adjust the opening of the ecological gate according to the reservoir water level of the reservoir so as to ensure that the drainage flow of the ecological gate is Qs, wherein Qs is an ecological flow design value of the reservoir; the water supply gate is provided with a gate opening monitoring device and an automatic control device, the reservoir is provided with a reservoir water level monitoring device, the water supply gate is connected with a water supply system, the water supply system allows water supply flow to fluctuate, the reservoir is provided with a runoff forecasting system for forecasting water supply flow of the reservoir from hour to hour, and the water supply system is provided with a water supply forecasting system for forecasting daily water supply demand flow Qx, and is characterized in that: the water supply scheduling method is suitable for the condition of no rainfall of the reservoir, and comprises the following steps:
s1: obtaining daily water supply demand flow Qx and daily water supply quantity Wx according to the forecast of a water supply forecast system at the beginning of a daily period, obtaining hour-by-hour inflow Qi and daily water supply quantity Wr of a reservoir according to the forecast of a runoff forecast system, calculating daily ecological water quantity Ws of the reservoir according to an ecological flow design value Qs of the reservoir, calculating daily reservoir water quantity Wc of the reservoir according to the daily water supply quantity Wx, the daily water supply quantity Wr and the daily ecological water quantity Ws, obtaining reservoir water level H1 at the current moment, calculating current reservoir capacity V1 of the reservoir according to a water level reservoir capacity curve, calculating reservoir capacity V2 at the daily end moment of the reservoir according to the current reservoir capacity V1 and the daily reservoir water quantity Wc, and then calculating reservoir water level H2 at the daily end moment of the reservoir according to the water level reservoir capacity curve;
s2: the daily water supply scheduling is carried out from the beginning of the daily moment, the opening of the water supply gate is adjusted by utilizing an automatic control device of the water supply gate according to the daily water supply demand flow Qx in combination with the current reservoir water level, so that the water flow of the water supply gate is equal to the daily water supply demand flow Qx, and the reservoir water level Hi at the current moment is obtained after the water supply gate operates for 1 hour;
s3: calculating the actual incoming flow rate Qk of the last hour according to the current reservoir water level Hi and the reservoir water level H1 before the last hour by combining the water balance of the reservoir, calculating a deviation coefficient K according to the actual incoming flow rate Qk of the last hour and the incoming flow rate Qik of the last hour obtained by forecasting of the runoff forecasting system, wherein the deviation coefficient K=Qk/Qik is used for correcting the incoming flow rate from the current moment obtained by forecasting of the runoff forecasting system to the daily end moment, and the correction is that the incoming flow rate from the current moment obtained by forecasting of the runoff forecasting system to the daily end moment in the step S1 is multiplied by the deviation coefficient K to obtain the incoming flow rate Qip from the current moment of forecasting to the daily end moment;
s4: according to the reservoir water level Hi obtained in the step S3 and the predicted inflow Qip from the current moment to the daily end moment, the reservoir water level H2 at the daily end moment is taken as a control condition, and the ecological flow design value Qs is combined to perform water balance calculation of the reservoir, so that the average water supply flow Qxi of the reservoir from hour to hour is calculated;
s5: according to the average water supply flow Qxi of the reservoirs per hour obtained in the step S4, the opening of the water supply gate is adjusted by utilizing an automatic control device of the water supply gate in combination with the current reservoir water level Hi, so that the water flow of the water supply gate is equal to the water supply flow Qxi, scheduling for the second hour is carried out, and after the second hour is finished, the reservoir water level Hii at the current moment is obtained;
s6: repeating the steps S3-S5 until the operation is carried out for one hour before the daily ending time, obtaining the average water supply flow Qxii of the hour, and adjusting the opening of the water supply gate by utilizing the automatic control device of the water supply gate according to the average water supply flow Qxii and the current reservoir water level in one hour before the daily ending time to enable the water flow of the water supply gate to be equal to the water supply flow Qxii.
The ecological gate can be determined by a test or hydraulics mode, and the opening value of the ecological gate under different water levels can be adjusted according to the curve, so that the discharge of the ecological flow is always equal to the design value of the ecological flow.
The water supply gate can determine the relation curve of the opening degree of the water supply gate and the flow rate and the water level in a test or hydraulic mode, and an automatic control system of the water supply gate can automatically call the relation curve of the opening degree of the water supply gate and the flow rate and the water level according to the required flow rate value and the current reservoir water level and determine the opening degree value of the water supply gate.
Preferably, the daily period in S1 is initially a time scheduled by the daily reservoir dispatching plan, and the period is initially zero or eight am each day.
Preferably, the water supply gates are all provided with opening-water level-flow curves, and the flow value of the water supply gate can be calculated according to any opening and water level or the opening value of the water supply gate can be calculated according to any water level and flow value.
Preferably, the water balance of the reservoir is calculated as the water supply amount and the water output amount of a certain period of the reservoir, wherein the water output amount comprises the water supply amount and the ecological water amount, the reservoir water storage amount of the certain period is calculated, the reservoir capacity at the beginning of the period is utilized to be added with the reservoir water storage amount of the period, the reservoir capacity at the end of the period is obtained, and the conversion between the reservoir capacity and the water level utilizes a water level reservoir capacity curve.
The acquisition of the reservoir water level should be filtered, and when the reservoir water level is acquired at the moment, the values of the reservoir water levels in a plurality of adjacent time periods are averaged to eliminate the data error of accidental measurement, and the filtering process can be realized through computer software.
The above-described embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be construed as being limited to the specific forms set forth by the examples, but also includes equivalent technical means as will occur to those skilled in the art based on the inventive concept.
Claims (4)
1. The water supply scheduling method is suitable for water supply scheduling of a reservoir, the reservoir comprises an ecological drainage device and a water supply gate, the ecological drainage device is a ecological gate, the gate opening of the ecological gate is adjustable, the ecological gate is provided with an automatic control system, the automatic control system can adjust the opening of the ecological gate according to the reservoir water level of the reservoir so as to ensure that the drainage flow of the ecological gate is Qs, wherein Qs is an ecological flow design value of the reservoir; the water supply gate is provided with a gate opening monitoring device and an automatic control device, the reservoir is provided with a reservoir water level monitoring device, the water supply gate is connected with a water supply system, the water supply system allows water supply flow to fluctuate, the reservoir is provided with a runoff forecasting system for forecasting water supply flow of the reservoir from hour to hour, and the water supply system is provided with a water supply forecasting system for forecasting daily water supply demand flow Qx, and is characterized in that: the water supply scheduling method is suitable for the condition of no rainfall of the reservoir, and comprises the following steps:
s1: obtaining daily water supply demand flow Qx and daily water supply quantity Wx according to the forecast of a water supply forecast system at the beginning of a daily period, obtaining hour-by-hour inflow Qi and daily water supply quantity Wr of a reservoir according to the forecast of a runoff forecast system, calculating daily ecological water quantity Ws of the reservoir according to an ecological flow design value Qs of the reservoir, calculating daily reservoir water quantity Wc of the reservoir according to the daily water supply quantity Wx, the daily water supply quantity Wr and the daily ecological water quantity Ws, obtaining reservoir water level H1 at the current moment, calculating current reservoir capacity V1 of the reservoir according to a water level reservoir capacity curve, calculating reservoir capacity V2 at the daily end moment of the reservoir according to the current reservoir capacity V1 and the daily reservoir water quantity Wc, and then calculating reservoir water level H2 at the daily end moment of the reservoir according to the water level reservoir capacity curve;
s2: the daily water supply scheduling is carried out from the beginning of the daily moment, the opening of the water supply gate is adjusted by utilizing an automatic control device of the water supply gate according to the daily water supply demand flow Qx in combination with the current reservoir water level, so that the water flow of the water supply gate is equal to the daily water supply demand flow Qx, and the reservoir water level Hi at the current moment is obtained after the water supply gate operates for 1 hour;
s3: calculating the actual incoming flow rate Qk of the last hour according to the current reservoir water level Hi and the reservoir water level H1 before the last hour by combining the water balance of the reservoir, calculating a deviation coefficient K according to the actual incoming flow rate Qk of the last hour and the incoming flow rate Qik of the last hour obtained by forecasting of the runoff forecasting system, wherein the deviation coefficient K=Qk/Qik is used for correcting the incoming flow rate from the current moment obtained by forecasting of the runoff forecasting system to the daily end moment, and the correction is that the incoming flow rate from the current moment obtained by forecasting of the runoff forecasting system to the daily end moment in the step S1 is multiplied by the deviation coefficient K to obtain the incoming flow rate Qip from the current moment of forecasting to the daily end moment;
s4: according to the reservoir water level Hi obtained in the step S3 and the predicted inflow Qip from the current moment to the daily end moment, the reservoir water level H2 at the daily end moment is taken as a control condition, and the ecological flow design value Qs is combined to perform water balance calculation of the reservoir, so that the average water supply flow Qxi of the reservoir from hour to hour is calculated;
s5: according to the average water supply flow Qxi of the reservoirs per hour obtained in the step S4, the opening of the water supply gate is adjusted by utilizing an automatic control device of the water supply gate in combination with the current reservoir water level Hi, so that the water flow of the water supply gate is equal to the water supply flow Qxi, scheduling for the second hour is carried out, and after the second hour is finished, the reservoir water level Hii at the current moment is obtained;
s6: repeating the steps S3-S5 until the operation is carried out for one hour before the daily ending time, obtaining the average water supply flow Qxii of the hour, and adjusting the opening of the water supply gate by utilizing the automatic control device of the water supply gate according to the average water supply flow Qxii and the current reservoir water level in one hour before the daily ending time to enable the water flow of the water supply gate to be equal to the water supply flow Qxii.
2. The water supply scheduling method of claim 1, wherein: the beginning of the daily period in the step S1 is the moment of planning the daily reservoir dispatching plan, and the beginning of the period is zero or eight am every day.
3. The water supply scheduling method of claim 1, wherein: the water supply gate is provided with an opening-water level-flow curve, and the flow value of the water supply gate can be calculated according to any opening and water level or the opening value of the water supply gate can be calculated according to any water level and flow value.
4. The water supply scheduling method of claim 1, wherein: the water balance of the reservoir is calculated as the water inflow and water outflow of a certain period of the reservoir, wherein the water outflow comprises the water supply amount and the ecological water amount, the reservoir water reservoir amount in a certain period is calculated, the reservoir capacity at the beginning of the period is utilized and the reservoir water reservoir amount in the period is added, the reservoir capacity at the end of the period is obtained, and the conversion between the reservoir capacity and the water level utilizes a water level reservoir capacity curve.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117252406A (en) * | 2023-11-20 | 2023-12-19 | 长江水利委员会长江科学院 | Water replenishing scheduling method, device and medium facing downstream water taking requirement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117252406A (en) * | 2023-11-20 | 2023-12-19 | 长江水利委员会长江科学院 | Water replenishing scheduling method, device and medium facing downstream water taking requirement |
| CN117252406B (en) * | 2023-11-20 | 2024-02-02 | 长江水利委员会长江科学院 | Water replenishing scheduling method, device and medium facing downstream water taking requirement |
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