CN112989607B - Emergency regulation and control method for open channel water delivery engineering accident section water return gate - Google Patents
Emergency regulation and control method for open channel water delivery engineering accident section water return gate Download PDFInfo
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Abstract
The invention discloses an emergency regulation and control method for a water return gate in an accident section of an open channel water delivery project. In the later stage of emergency dispatching, the invention combines the water level prediction formula calculation result to correct the starting time of the water return gate; in the aspect of setting the closing water level of the water return gate, the design water level is replaced by the normal operation lower limit water level so as to prolong the single water return time of the water return gate. The invention is beneficial to reducing the starting times of the water return gate and improving the order and reliability of emergency regulation.
Description
Technical Field
The invention belongs to the field of water delivery engineering, and particularly relates to an emergency regulation and control method for a water return gate of an accident section of an open channel water delivery engineering.
Background
In order to adjust the uneven distribution of water resources, a plurality of long-distance open channel water delivery projects, such as south-to-north water center line projects, east-to-west line projects and the like, are constructed in China. In order to facilitate the adjustment of water level and flow, the channels are provided with throttle gates at intervals. In order to cope with the sudden accident, a water return gate is arranged in the channel.
During emergency dispatch, the check gates at two ends of the accident point are closed rapidly, and the water delivery flow is reduced. The water flow at the accident section keeps downstream movement under the action of inertia, after being blocked by the throttle, partial water wave is reflected to propagate upstream, and is reflected and propagates reversely again after encountering the throttle, and the water flow is stopped gradually after being reciprocated for many times. Therefore, in the whole hydraulic transition process, the gradient of the water surface line is slowed down and the water level is greatly fluctuated, and the hydraulic transition process lasts for several hours or even more than ten hours. In order to prevent the water level from climbing too high, the water return gate needs to be started for a plurality of times. Meanwhile, the safety and the economy are both considered, and the water level is required to be stopped at a set position after being stabilized, and is usually the maximum safe water level.
In the traditional method, emergency control of the water return gate mainly depends on personal experience and judgment of operators. Because the hydraulic transition process is longer, the accurate pre-judging of the stable water level is more difficult, the water return gate is opened only when the water level at the water return gate exceeds the starting water level in the early stage of emergency regulation, and the water level (usually the design water level) is closed by adopting the higher water return gate so as to avoid excessive water return. And in the later stage of emergency regulation, when the water level is close to stable, starting the water return gate for multiple times to correct. Limited by the manual prejudgment level, the early operation is conservative, the water level deviation is frequently corrected in the later stage, and the open and close times of the water return gate are more.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a method for emergency regulation and control of a water return gate, which is used for estimating the required starting time of the water return gate in advance and orderly arranging water return according to the water condition and time in the early stage of emergency dispatch; in the later stage of emergency dispatching, the water level prediction formula calculation result is combined, and the starting time of the water return gate is corrected; in the aspect of setting the closing water level of the water return gate, the design water level is replaced by the normal operation lower limit water level so as to prolong the single water return time of the water return gate. The invention is beneficial to reducing the starting times of the water return gate and improving the order and reliability of emergency regulation.
In order to achieve the aim of the invention, the invention adopts the following technical scheme: an emergency regulation and control method for a water return gate of an accident section of an open channel water delivery project comprises the following steps:
s1, establishing a one-dimensional non-uniform flow simulation model of an accident section channel;
s2, acquiring t before an accident based on a one-dimensional non-uniform flow simulation model 0 The volume of the water body of the accident section at moment;
s3, acquiring t after accident based on one-dimensional non-uniform flow simulation model 1 The volume of the water body of the accident section at moment;
s4, according to t 0 Time sum t 1 The water volume of the accident section at the moment is obtained and estimated time for starting the water return gate;
s5, acquiring a water level fluctuation period in the hydraulic transition process;
s6, monitoring the water level at the water return gate and the water level before the gate;
s7, selecting the opening and closing of the water return gate according to the water level at the water return gate, and recording the water return time of each water return;
s8, updating the estimated starting time of the water return gate according to the water level fluctuation period and the water level before the gate to obtain the final starting time of the water return gate;
s9, judging whether the accumulated value of the water-out time is equal to the final water-out brake starting time, if so, ending the water-out brake regulation, otherwise, repeating the step S7 until the accumulated value of the water-out time is equal to the final water-out brake starting time, and ending the water-out brake regulation.
Further, the one-dimensional non-uniform flow simulation model in the step S1 is constructed by HEC-RAS or Mike 11, which is divided into N pieces with the length of l by N+1 flow sections i I=1, 2,..n.
Further, the step S2 is performed before the accident t 0 Time of accident section water volume V (t) 0 ) The method comprises the following steps:
wherein ,Vi (t 0 ) Indicating that the ith sub-channel is at t 0 Time of day volume of water, A i (t 0 ) Indicating that the ith flow cross section is at t 0 The overflow area at the moment A i+1 (t 0 ) Indicating that the (i+1) th flow cross section is at t 0 Area of flow-through at the moment.
Further, the post-accident t in the step S3 1 Time of accident section water volume V (t) 1 ) The method comprises the following steps:
wherein ,Vi (t 1 ) Indicating that the ith sub-channel is at t 1 Time of day volume of water, A i (t 1 ) Indicating that the ith flow cross section is at t 1 The overflow area at the moment A i+1 (t 1 ) Indicating that the (i+1) th flow cross section is at t 1 Flow surface at momentAnd (3) accumulation.
Further, the step S4 is to estimate the open time T of the return sluice esc The method comprises the following steps:
wherein ,V(t0 ) Indicating the pre-accident t 0 Time of accident section water volume, V (t) 1 ) Indicating t after accident 1 The volume of the water body of the accident section at the moment, q represents the design flow of the water return gate.
Further, the water level fluctuation period T in the step S5 wave The method comprises the following steps:
wherein L represents one-way travel of water wave, C represents wave velocity of water wave, g represents gravitational acceleration, A i (t 1 ) Representing t 1 The flow area of the ith flow section at the moment, B i (t 1 ) Representing t 1 The water surface width of the ith flow section at the moment.
Further, the step S7 specifically includes:
s7.1, judging the water level Y at the water return gate esc (t) whether or not the water return gate starting level Y is greater than or equal to max If yes, opening a water return gate, repeating the step S7.1, otherwise, entering the step S7.2;
s7.2, judging the water level Y at the water return gate esc (t) whether or not is less than or equal to the return sluice closing level Y min If yes, closing the water return gate, recording the time t for water return esc (t) and returning to step S7.1, otherwise proceeding to step S7.3;
s7.3, judging the water level Y at the water return gate esc (t) whether to rise, if so, proceeding to step S7.4, otherwiseMaintaining the return gate closed and repeating step S7.3;
s7.4, judging the water level Y at the water return gate esc (t) whether the water stop is raised or is greater than the water return brake starting water level Y max If yes, the water return gate is opened, and the step S7.2 is returned, otherwise, the water return gate is kept closed, and the step S7.4 is repeated.
Further, the step S8 specifically includes:
s8.1, judging the accumulated value of the water withdrawal timeWhether or not to be greater than 0.9T esc If yes, predicting t by adopting a secondary moving average method 2 The water level before the gate at the moment is +.>And enter step S8.2, otherwise repeat step S8.1;
s8.2, judging t 2 Time of pre-gate water levelWhether or not it is smaller than Y gate (t 1 ) -0.02m, if so, updating the estimated time of return brake activation to T esc * (1-1%), obtaining final open time of the water return gate, otherwise, entering step S8.3;
s8.3, judging t 2 Time of pre-gate water levelWhether or not it is greater than Y gate (t 1 ) +0.02m, if so, updating the estimated time for starting the water return gate to T esc * (1+1%) to obtain final open time of water-return gate, otherwise, judgingAnd taking the estimated time for starting the water return gate directly as the final time for starting the water return gate;
wherein ,t2 Indicating that the current time T is increased by 0.1T esc At the later time, T esc Indicating estimated return gate activationTime, Y gate (t 1 ) Representing t 1 Time pre-gate water level.
Further, t in the step S8.2 2 The water level before the gate at the moment isThe method comprises the following steps:
a t ＝2Y gate (t) (1) -Y gate (t) (2)
wherein ,at Representing the first intermediate coefficient, b t Representing a second intermediate coefficient, Y gate (t) (1) Represents Y gate A one-time moving average value of (t), Y gate (t) (2) Represents Y gate The second moving average of (T), T f Indicating the period number between the current period and the predicted period, n indicating the crossing period of the moving average, n and the water level fluctuation period T wave Equal.
The beneficial effects of the invention are as follows:
(1) The invention provides an emergency regulation and control method for a water return gate in an accident section of an open channel water delivery project.
(2) In the later stage of emergency dispatching, the invention combines the water level prediction formula calculation result to correct the starting time of the water return gate; in the aspect of setting the closing water level of the water return gate, the design water level is replaced by the normal operation lower limit water level so as to prolong the single water return time of the water return gate.
(3) The invention is beneficial to reducing the starting times of the water return gate and improving the order and reliability of emergency regulation.
(4) Compared with the traditional method that operators use experience to judge whether to open the water return gate, the water return time and the water return quantity are more accurate, excessive water return can be avoided, the times of opening and closing the water return gate are reduced, and the water return efficiency is improved.
Drawings
FIG. 1 is a flow chart of an emergency control method for a return valve in an accident section of an open channel water delivery project.
FIG. 2 is a schematic diagram of the structure and water level corresponding to the channel of the accident section.
FIG. 3 is a graph showing the comparison of the results of the water level test of the water return gate according to the second embodiment of the present invention.
FIG. 4 is a graph showing the comparison of the results of the pre-gate water level test in the second embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and all the inventions which make use of the inventive concept are protected by the spirit and scope of the present invention as defined and defined in the appended claims to those skilled in the art.
Embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
As shown in FIG. 1, the emergency regulation and control method for the open channel water delivery engineering accident section water return gate comprises the following steps:
s1, establishing a one-dimensional non-uniform flow simulation model of an accident section channel;
s2, acquiring t before an accident based on a one-dimensional non-uniform flow simulation model 0 The volume of the water body of the accident section at moment;
s3, acquiring t after accident based on one-dimensional non-uniform flow simulation model 1 The volume of the water body of the accident section at moment;
s4, according to t 0 Time sum t 1 The water volume of the accident section at the moment is obtained and estimated time for starting the water return gate;
s5, acquiring a water level fluctuation period in the hydraulic transition process;
s6, monitoring the water level at the water return gate and the water level before the gate;
s7, selecting the opening and closing of the water return gate according to the water level at the water return gate, and recording the water return time of each water return;
s8, updating the estimated starting time of the water return gate according to the water level fluctuation period and the water level before the gate to obtain the final starting time of the water return gate;
s9, judging whether the accumulated value of the water-out time is equal to the final water-out brake starting time, if so, ending the water-out brake regulation, otherwise, repeating the step S7 until the accumulated value of the water-out time is equal to the final water-out brake starting time, and ending the water-out brake regulation.
The one-dimensional non-uniform flow simulation model in the step S1 is constructed by HEC-RAS or Mike 11, and is divided into N pieces with the length of l by N+1 flow sections i I=1, 2,..n. Each sub-channel section has a corresponding flow section.
Pre-accident t in said step S2 0 Time of accident section water volume V (t) 0 ) The method comprises the following steps:
wherein ,Vi (t 0 ) Indicating that the ith sub-channel is at t 0 Time of day volume of water, A i (t 0 ) Indicating that the ith flow cross section is at t 0 The overflow area at the moment A i+1 (t 0 ) Indicating that the (i+1) th flow cross section is at t 0 Area of flow-through at the moment.
The post-accident t in the step S3 1 Time of accident section water volume V (t) 1 ) The method comprises the following steps:
wherein ,Vi (t 1 ) Indicating that the ith sub-channel is at t 1 Time of day volume of water, A i (t 1 ) Represents the ith flow cross sectionAt t 1 The overflow area at the moment A i+1 (t 1 ) Indicating that the (i+1) th flow cross section is at t 1 Area of flow-through at the moment.
Estimating the open time T of the return gate in the step S4 esc The method comprises the following steps:
wherein ,V(t0 ) Indicating the pre-accident t 0 Time of accident section water volume, V (t) 1 ) Indicating t after accident 1 The volume of the water body of the accident section at the moment, q represents the design flow of the water return gate.
The period T of the water level fluctuation in the step S5 wave The method comprises the following steps:
wherein L represents one-way travel of water wave, C represents wave velocity of water wave, g represents gravitational acceleration, A i (t 1 ) Representing t 1 The flow area of the ith flow section at the moment, B i (t 1 ) Representing t 1 The water surface width of the ith flow section at the moment.
The step S7 specifically includes:
s7.1, judging the water level Y at the water return gate esc (t) whether or not the water return gate starting level Y is greater than or equal to max If yes, opening a water return gate, repeating the step S7.1, otherwise, entering the step S7.2;
s7.2, judging the water level Y at the water return gate esc (t) whether or not is less than or equal to the return sluice closing level Y min If yes, closing the water return gate, recording the time t for water return esc (t) and returning to step S7.1, otherwise proceeding to step S7.3;
s7.3, judging the water withdrawalLevel Y at the gate esc (t) if so, proceeding to step S7.4, otherwise, maintaining the return gate closed, and repeating step S7.3;
s7.4, judging the water level Y at the water return gate esc (t) whether the water stop is raised or is greater than the water return brake starting water level Y max If yes, the water return gate is opened, and the step S7.2 is returned, otherwise, the water return gate is kept closed, and the step S7.4 is repeated.
The step S8 specifically includes:
s8.1, judging the accumulated value of the water withdrawal timeWhether or not to be greater than 0.9T esc If yes, predicting t by adopting a secondary moving average method 2 The water level before the gate at the moment is +.>And enter step S8.2, otherwise repeat step S8.1;
s8.2, judging t 2 Time of pre-gate water levelWhether or not it is smaller than Y gate (t 1 ) -0.02m, if so, updating the estimated time of return brake activation to T esc * (1-1%), obtaining final open time of the water return gate, otherwise, entering step S8.3;
s8.3, judging t 2 Time of pre-gate water levelWhether or not it is greater than Y gate (t 1 ) +0.02m, if so, updating the estimated time for starting the water return gate to T esc * (1+1%) to obtain final open time of water-return gate, otherwise, judgingAnd taking the estimated time for starting the water return gate directly as the final time for starting the water return gate;
wherein ,t2 Indicating that the current time T is increased by 0.1T esc At the later time, T esc Represents estimated time for starting the water return gate, Y gate (t 1 ) Representing t 1 Time pre-gate water level.
T in the step S8.2 2 The water level before the gate at the moment isThe method comprises the following steps:
a t ＝2Y gate (t) (1) -Y gate (t) (2)
wherein ,at Representing the first intermediate coefficient, b t Representing a second intermediate coefficient, Y gate (t) (1) Represents Y gate A one-time moving average value of (t), Y gate (t) (2) Represents Y gate The second moving average of (T), T f Indicating the period number between the current period and the predicted period, n indicating the crossing period of the moving average, n and the water level fluctuation period T wave Equal.
The beneficial effects of the invention are as follows:
(1) The invention provides an emergency regulation and control method for a water return gate in an accident section of an open channel water delivery project.
(2) In the later stage of emergency dispatching, the invention combines the water level prediction formula calculation result to correct the starting time of the water return gate; in the aspect of setting the closing water level of the water return gate, the design water level is replaced by the normal operation lower limit water level so as to prolong the single water return time of the water return gate.
(3) The invention is beneficial to reducing the starting times of the water return gate and improving the order and reliability of emergency regulation.
(4) Compared with the traditional method that operators use experience to judge whether to open the water return gate, the water return time and the water return quantity are more accurate, excessive water return can be avoided, the times of opening and closing the water return gate are reduced, and the water return efficiency is improved.
Example two
As shown in FIG. 2, the accident section channel includes an upper check gate, a lower check gate and a return gate. The starting water level of the water return gate is Y max The closing water level is Y min . Before accident, the water flow rate of channel is Q (t 0 ) The water level before the brake is Y gate (t 0 ). After accident, the upper and lower check gates are closed in emergency, the water delivery flow is reduced to Q (t) 1 ). In order to ensure that the instantaneous water level at the water return gate does not exceed Y in the hydraulic transition process max The water level before the brake is stabilized at Y gate (t 1 ) The following method of controlling the return gate was employed.
1. And establishing a one-dimensional non-uniform flow simulation model of the accident section channel. The method can adopt commercial software of water conservancy industry, such as HEC-RAS, mike 11 and the like, and can also adopt language autonomous modeling such as Fortran, matlab and the like. In the simulation model, channels are divided into N lengths l by N+1 flow sections i (i=1 to N).
2. Inputting t before accident by adopting the simulation model established in the step 1 0 Time water flow Q (t) 0 ) Level Y before the sum brake gate (t 0 ) Calculating the water surface line before accident and outputting the water level Y of each flow section i (t 0 ) Area A of overcurrent i (t 0 ) And water surface width B i (t 0 ) Calculating the water volume V of each sub-channel i (t 0 ) And (3) obtaining the volume of the water body of the accident section after superposition:
3. adopting the simulation model established in the step 1, and inputting t after accident 1 Time water flow Q (t) 1 ) Level Y before the sum brake gate (t 1 ) Calculating the water surface line after emergency regulation and control, and outputting the water level Y of each flow section i (t 1 ) Area A of overcurrent i (t 1 ) And water surface width B i (t 1 ) Calculating the water volume V of each sub-channel i (t 1 ) And (3) obtaining the volume of the water body of the accident section after superposition:
4. estimating required time for the return gate to be activatedWhere q is the design flow of the return gate.
5. Estimating period of water level fluctuation in hydraulic transition processWherein L is the one-way travel of water wave, C is the wave speed, < >>
6. Monitoring the level Y at the return sluice esc (t) and Pre-Gate Water level Y gate (t)。
a)Y esc (t)≥Y max Opening a water return gate;
b)Y esc (t)≤Y min closing the water return gate and recording the time t for water return esc (t)；
c)Y min <Y esc (t)<Y max If Y esc (t) rising to maintain the return gate closed; if Y esc (t) stopping the expansion and starting a water return gate; if Y esc And (t) the water level is kept unchanged or falls, and the return sluice is kept closed.
When (when)In the time of predicting t by adopting a quadratic moving average method 2 ＝t+0.1T esc Time pre-gate water level->When->In the case of a stable state, the control device,
if it isThen T is esc ＝T esc -T esc *1％；
If it isThen T is esc ＝T esc +T esc *1％；
If it isThen T is esc ＝T esc 。
In the prediction formula, a t ＝2Y gate (t) (1) -Y gate (t) (2) ，Y gate (t) (1) Is Y gate A one-time moving average value of (t), Y gate (t) (2) Is Y gate A second moving average of (t); t (T) f For the number of periods between the current period T and the predicted period, the predicted period is 0.1T esc Counting; n is the span of the moving average, n=t wave 。
7. When the water-out time is accumulatedAnd ending the regulation of the water return gate.
In this embodiment, taking an accident occurring in the channel section between the south-to-north central line engineering Pu Yanghe throttle gate and the west-black mountain throttle gate as an example, the accident section is 36830m long, and the characteristic parameters are shown in table 1. The accident point is located at the entrance of the sentry tunnel and is spaced from the Pu Yanghe throttle gate 27099m, and the normal operation lower limit water level is 66.0m. The accident point is close to the water outlet valve of the channel, and the water outlet valve is started to use the water level Y max = 66.61m, shut-off level Y min Design of the water withdrawal flow 62.5m = 65.99m 3 /s。Before accident, channel water flow Q (t 0 )＝58m 3 S, pre-gate water level Y gate (t 0 ) = 65.45m. After accident, the upper and lower check gates are closed in emergency, the water delivery flow is reduced to Q (t) 1 )＝0m 3 And/s. In order to ensure that the instantaneous water level does not exceed Y in the hydraulic transition process max The water level before the gate is stabilized at Y = 66.61m gate (t 1 ) = 66.10m, the following method of return gate regulation was used:
TABLE 1 Accident segment characterization parameters
1. And (3) establishing a one-dimensional non-uniform flow simulation model of the accident section channel by adopting HEC-RAS water conservancy simulation software, wherein the model is divided into 240 sub-channel sections by 241 flow sections.
2. Calculating the water surface line before an accident by adopting a simulation model, outputting hydraulic parameters of each flow section, and calculating the water volume before the accident section accident: v (t) 0 ) = 392.287 km 3 。
3. Calculating water surface lines after emergency regulation by adopting a simulation model, outputting hydraulic parameters of various flow sections, and calculating the water volume after accident section accidents: v (t) 1 ) = 342.166 km 3 。
4. Estimating required time for the return gate to be activated
5. Estimating period of water level fluctuation in hydraulic transition processMedium wave velocity
6. Monitoring the level Y at the return sluice esc (t) and Pre-Gate Water level Y gate (t)。
The simulation process of the water level before the front guard gate and the rear black mountain gate is shown in figures 3 and 4.
At 10min, accident happens, Y esc (t) continuously rising to 19min, and still not reaching the water level for enabling the water return gate, wherein the water return gate is not enabled.
At 20min, satisfy Y esc (t) at 66.6m or more, opening the water-return gate to return water for 96min to 115min, and meeting Y esc (t) closing the water return gate under the condition of less than or equal to 66.0 m;
116 min-146 min, and meets 66.0m<Y esc (t)<66.6m, and the accumulated water withdrawal time is less than 120min (i.e. 0.9T esc ) And Y is esc (t) an elevated condition, maintaining the return lock closed;
at 147min, 66.0m is satisfied<Y esc (t)<66.6m, and the accumulated water withdrawal time is less than 120min (i.e. 0.9T esc ) And Y is esc (t) under the condition of stopping the expansion, starting the water return gate to return water for 17min till 163min, and meeting the requirement of Y esc (t) closing the water return gate under the condition of less than or equal to 66.0 m;
164 min-187 min, and meets 66.0m<Y esc (t)<66.6m, and the accumulated water withdrawal time is less than 120min (i.e. 0.9T esc ) And Y is esc And (t) the rising condition, maintaining the closing of the water return gate.
At 188min, 66.0m is satisfied<Y esc (t)<66.6m, and the accumulated water withdrawal time is less than 120min (i.e. 0.9T esc ) And Y is esc (T) under the condition of stopping the expansion, starting the water-return gate to return water for 7min, and when the time reaches 194min, the accumulated water-return time is equal to 120min (namely 0.9T) esc ) And Y is esc (t) a drop condition, closing the return gate;
195 th to 750 th min, meets 66.0m<Y esc (t)<66.6m, and the accumulated water withdrawal time is equal to 120min (i.e. 0.9T esc ) But under the conditions of (1)And the return gate is kept closed without stabilization.
At 751min, 66.0m is satisfied<Y esc (t)<66.6m, and the accumulated water withdrawal time is equal to 120min (i.e. 0.9T esc ) And (2) andconditions of T esc ＝T esc -T esc *1％＝132min。Y esc (t) stopping the expansion, starting the water return gate to return water for 4min to 754min, and meeting the requirement of Y esc (t) closing the water return gate under the condition of less than or equal to 66.0 m;
755 min-774 min, and satisfies 66.0m<Y esc (t)<66.6m, and the accumulated water withdrawal time is greater than 120min (i.e. 0.9T esc ) And (2) andconditions of T esc ＝T esc 。Y esc And (t) rising to maintain the closing of the water return gate.
At 775min, 66.0m is satisfied<Y esc (t)<66.6m, and the accumulated water withdrawal time is greater than 120min (i.e. 0.9T esc ) And predicted pre-gate water levelConditions T esc ＝T esc 。Y esc (t) stopping the expansion, starting the water return gate to return water for 4min to 778min, and meeting the requirement of Y esc (t) closing the water return gate under the condition of less than or equal to 66.0 m;
779 min-797 min, and meets 66.0m<Y esc (t)<66.6m, and the accumulated water withdrawal time is greater than 120min (i.e. 0.9T esc ) And predicted pre-gate water levelConditions T esc ＝T esc 。Y esc And (t) rising to maintain the closing of the water return gate.
At 798min, 66.0m is satisfied<Y esc (t)<66.6m, and the accumulated water withdrawal time is greater than 120min (i.e. 0.9T esc ) And predicted pre-gate water levelConditions T esc ＝T esc 。Y esc (t) stopping the expansion, starting the water return gate to return water for 4min to 801min, and meeting the requirement of Y esc (t) closing the water return gate under the condition of less than or equal to 66.0 m;
at 802min, satisfyAnd (5) finishing the regulation and control of the water return gate.
The traditional method is based on manual judgment of water condition change, and the result is shown by thin dotted lines in fig. 3 and 4; the method judges the water condition change based on the simulation model and the prediction model, and the result is shown as a thin solid line in the figure. As a comparison, the method of the present invention is used 6 times in terms of the number of times the floodgate is activated, and the conventional method is used 18 times. In the aspect of pre-gate water level control, the traditional method exceeds a set range in the later regulation and control period, and the requirement is met after multiple times of correction, but the method does not exceed the set range. Obviously, the method is superior to the traditional method in terms of reducing the starting times of the water return gate and improving the order and reliability of emergency regulation.
Claims (7)
1. An emergency regulation and control method for a water return gate of an accident section of an open channel water delivery project is characterized by comprising the following steps:
s1, establishing a one-dimensional non-uniform flow simulation model of an accident section channel;
s2, acquiring a pre-accident based on a one-dimensional non-uniform flow simulation modelThe volume of the water body of the accident section at moment;
s3, acquiring an accident based on a one-dimensional non-uniform flow simulation modelThe volume of the water body of the accident section at moment;
s4, according toTime and->The water volume of the accident section at the moment is obtained and estimated time for starting the water return gate;
s5, acquiring a water level fluctuation period in the hydraulic transition process;
s6, monitoring the water level at the water return gate and the water level before the gate;
s7, selecting the opening and closing of the water return gate according to the water level at the water return gate, and recording the water return time of each water return;
s8, updating the estimated starting time of the water return gate according to the water level fluctuation period and the water level before the gate to obtain the final starting time of the water return gate;
s9, judging whether the accumulated value of the water-out time is equal to the final water-out brake starting time, if so, ending the water-out brake regulation, otherwise, repeating the step S7 until the accumulated value of the water-out time is equal to the final water-out brake starting time, and ending the water-out brake regulation;
the period of the water level fluctuation in the step S5The method comprises the following steps:
wherein ,Lrepresenting the one-way travel of the water wave,Cthe wave velocity of the water wave is represented,indicating the acceleration of gravity>Representation->Time of day (time)iThe flow area of the flow cross section, < >>Representation->Time of day (time)iThe water surface of each flow section is wide;
the step S7 specifically includes:
s7.1, judging the water level at the water return gateWhether the water level of the water return gate is greater than or equal to the starting water level->If yes, opening a water return gate, repeating the step S7.1, otherwise, entering the step S7.2;
s7.2, judging the water level at the water return gateWhether is smaller than or equal to the closing water level of the water return gate>If yes, closing the water return gate and recording the water return time +.>And returning to the step S7.1, otherwise, entering the step S7.3;
s7.3, judging the water level at the water return gateIf the water pump rises, the step S7.4 is started, otherwise, the water return gate is kept closed, and the step S7.3 is repeated;
s7.4, judging the water level at the water return gateWhether the water level is stopped by rising or is greater than the water level of the water return gate>If yes, the water return gate is opened, and the step S7.2 is returned, otherwise, the water return gate is kept closed, and the step S7.4 is repeated.
2. The emergency control method for the open channel water delivery engineering accident section water return gate according to claim 1, wherein the one-dimensional non-uniform flow simulation model in the step S1 is constructed by HEC-RAS or Mike 11, and is composed ofN+1 flow sections are divided intoNLength of isIs used for the sub-channel section of the (c),i=1,2,...,N。
3. the emergency control method for the open channel water delivery engineering emergency section water return gate according to claim 2, wherein the step S2 is performed before an accidentTime accident section water volume->The method comprises the following steps:
wherein ,represent the firstiThe segment is in->Time of day water volume,/->Represent the firstiThe flow cross section is->Area of overflow at moment>Represent the firsti+1 flow cross section is->Area of flow-through at the moment.
4. The emergency control method for the open channel water delivery engineering accident section water return gate according to claim 2, wherein in the step S3, the post-accident condition isTime accident section water volume->The method comprises the following steps:
wherein ,represent the firstiThe segment is in->Time of day water volume,/->Represent the firstiThe flow cross section is->Area of overflow at moment>Represent the firsti+1 flow cross section is->Area of flow-through at the moment.
5. The open channel conveyor of claim 1The emergency control method for the water return gate in the water engineering accident section is characterized in that the starting time of the water return gate is estimated in the step S4The method comprises the following steps:
wherein ,indicating +.>Time of accident section water volume->Indicating +_after accident>Time of accident section water volume->Indicating the design flow rate of the water return gate.
6. The emergency control method for the open channel water delivery engineering accident section water return gate according to claim 1, wherein the step S8 specifically comprises:
s8.1, judging the accumulated value of the water withdrawal timeWhether or not is greater than 0.9%>If yes, adopting the quadratic moving average method to predict +.>The water level before the gate at the moment is +.>And go to step S8.2, otherwise repeat step S8.1;
s8.2, judgingTime pre-gate water level->Whether or not is less than->If yes, update the estimated time for starting the return sluice to +.>Obtaining final open time of the water return gate, otherwise, entering step S8.3;
s8.3, judgingTime pre-gate water level->Whether or not is greater than->If yes, update the estimated time for starting the return sluice to +.>Obtaining final open time of the water return gate, otherwise, judgingAnd taking the estimated time for starting the water-return gate directly as the final time for starting the water-return gate;
wherein ,indicating the current timetIncrease by 0.1->At a later time->Indicating estimated time to return gate activation +.>Representation->Time pre-gate water level.
7. The emergency control method for the open channel water delivery engineering accident section water return gate according to claim 6, wherein in the step S8.2The water level before the gate at the moment is +.>The method comprises the following steps:
wherein ,representing the first intermediate coefficient,/>Representing a second intermediate coefficient, ">Representation->Is>Representation->Second order moving average of>Indicates the number of periods between the current period and the predicted period, < >>Crossing period representing moving average, +.>And the period of water level fluctuation->Equal.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612755A (en) * | 2009-06-29 | 2015-05-13 | 光帆能源公司 | Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange |
| CN106223257A (en) * | 2016-07-25 | 2016-12-14 | 中国水利水电科学研究院 | A kind of long distance open channel accident section upstream emergency response gate group control method |
| CN108181940A (en) * | 2017-12-27 | 2018-06-19 | 中国水利水电科学研究院 | It meets an urgent need the regulation and control method of the gate in the case of cutting off the water supply suitable for series connection channel downstream |
| CN109024466A (en) * | 2018-08-10 | 2018-12-18 | 中国水利水电科学研究院 | A kind of water diversion project method of operation conversion method |
| CN112215461A (en) * | 2020-09-03 | 2021-01-12 | 长江勘测规划设计研究有限责任公司 | Long-distance water diversion project water delivery scheduling state analysis and early warning system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IL206241A0 (en) * | 2010-06-08 | 2010-12-30 | Fernando Patolsky | Modified nanowires for use in detecting nitro - containing chemicals |
-
2021
- 2021-03-17 CN CN202110283741.5A patent/CN112989607B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104612755A (en) * | 2009-06-29 | 2015-05-13 | 光帆能源公司 | Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange |
| CN106223257A (en) * | 2016-07-25 | 2016-12-14 | 中国水利水电科学研究院 | A kind of long distance open channel accident section upstream emergency response gate group control method |
| CN108181940A (en) * | 2017-12-27 | 2018-06-19 | 中国水利水电科学研究院 | It meets an urgent need the regulation and control method of the gate in the case of cutting off the water supply suitable for series connection channel downstream |
| CN109024466A (en) * | 2018-08-10 | 2018-12-18 | 中国水利水电科学研究院 | A kind of water diversion project method of operation conversion method |
| CN112215461A (en) * | 2020-09-03 | 2021-01-12 | 长江勘测规划设计研究有限责任公司 | Long-distance water diversion project water delivery scheduling state analysis and early warning system |
Non-Patent Citations (1)
| Title |
|---|
| 明渠调水工程事故段上游闸门群应急调控研究;崔巍等;《水利水电技术》;第48卷(第11期);第13-19页 * |
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