CN104005945A - Method for group control over small-sized and miniature submerged pumps in multiple-open-boundary tide test system - Google Patents
Method for group control over small-sized and miniature submerged pumps in multiple-open-boundary tide test system Download PDFInfo
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- CN104005945A CN104005945A CN201410268313.5A CN201410268313A CN104005945A CN 104005945 A CN104005945 A CN 104005945A CN 201410268313 A CN201410268313 A CN 201410268313A CN 104005945 A CN104005945 A CN 104005945A
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Abstract
The invention provides a method for group control over small-sized and miniature submerged pumps in a multiple-open-boundary tide test system. The method comprises the following steps that the flow of water flowing into each boundary of a preset test model and the flow of water flowing out of each boundary of the preset test model are monitored and controlled in real time; the flow change tendency result of each boundary is obtained through calculation and analysis; an A-phase current, a B-phase current and a C-phase current which are supplied to a three-phase power grid of the submerged pumps are monitored in real time; the dynamic balance performance of the three-phase power grid is judged, if any phase of the three-phase power grid is closed, the other two phases are opened, and then the next step is executed; according to the flow change tendency results, the corresponding submerged pumps located in the directions corresponding to the boundaries are controlled to be started or stopped, the starting time or the stopping time is also controlled, and the three-phase power grid is kept balanced. The method for group control over small-sized and miniature submerged pumps in the multiple-open-boundary tide test system is adaptable to various monitored objects and achieves accurate repetition of complicated tides and tidal waves in the test model, and the number, the coordinate positions and the powering-on time of the controlled objects such as water inlet submerged pumps and water discharge submerged pumps can be changed frequently, and the dynamic balance performance of the three-phase power grid is high.
Description
Technical field
The invention belongs to Hydraulic and Hydro-Power Engineering technical field, be specifically related to a kind ofly based on little miniature immersible pump group, open border tidal flow simulation experiment system more.
Background technique
Water conservancy project physical experiments is the hydraulic important means of research, tidal model automatical measure and control system is for simulating the special-purpose equipment of natural tidal phenomena, it can make natural morning and evening tides process according to certain geometry and time scale ratio, strictly on physical model, reappears.
Carry out various types of morning and evening tides and the current of physical model test, be by being distributed in each borderline great quantity of small of model or miniature unidirectional submersible pump (nearly more than 500 platforms), by computer, according to program, control respectively that the size of water inlet and water displacement forms.Therefore, the runnability of these submersible pumps, very big to the balance influence of three phase mains.
Conventionally the start-up course of motor, approximately needs part second to time several seconds.The same with transformer principle, staor winding is equivalent to the elementary of transformer, and rotor winding is equivalent to the secondary windings of short circuit, and therefore, the inrush current in staor winding is maximum, is about 4～7 times of rated current.So large inrush current can cause the fluctuation that circuit is very large, and affects the normal operation of other consumers.
Summary of the invention
Object of the present invention, overcomes the deficiencies in the prior art exactly, provide a kind of convenient and practical, balance is good opens the little miniature immersible pump group control method of border morning and evening tides pilot system more.
In order to achieve the above object, adopt following technological scheme:
Open the little miniature immersible pump group control method of border morning and evening tides pilot system more, it is characterized in that comprising the steps:
The flow on each border of the test model that Real-Time Monitoring is default with controlling turnover;
Computational analysis obtains the changes in flow rate trend result on each border;
A phase, B phase, the C phase current of the three phase network of Real-Time Monitoring access submersible pump;
The dynamical balance feature of judgement three phase network, if three phase network is any one closed mutually, other two-phase disconnects, and carries out next step;
According to changes in flow rate trend result, control submersible pump corresponding to orientation, corresponding border and open or closed condition, the time of opening or closing, the balance of maintenance three phase network.
Further, the border of described test model is comprised of concrete, timber, plastics or glass.
Further, to pass in and out the flow on each border of default test model be that described water-level gauge comprises differential pressure transmitter and mechanical water-level gauge by being installed on the water-level gauge on each border, being converted into flow obtaining by water level to described Real-Time Monitoring.
Further, the changes in flow rate trend result that described computational analysis obtains each border comprises three: real time water level detected higher than predetermined water level, real time water level detected and equal predetermined water level or real time water level detected lower than predetermined water level.
Further, A phase, B phase, the C phase current of the three phase network of described Real-Time Monitoring access submersible pump comprise that detection is loaded on the single phase alternating current simulation table of three phase network and the reading of digital watch.
Further, described submersible pump comprises that power is less than or equal to the single phase alternating current 220V movable submersible pump of 1kW.
Further, the balance of described maintenance three phase network comprises: the little phase line of submersible pump access current load of need opening, the submersible pump turn-off current that need the are stopped large phase line of loading.
Compared with prior art, beneficial effect of the present invention is:
By the little miniature immersible pump group control methods of border morning and evening tides pilot system of opening of the present invention more, effectively control and open border tidal flow simulation experiment system more, can adapt to all kinds of different monitored object, solve in test model the technical barrier of the complicated morning and evening tides of playback exactly, trend; According to time and the default test model of scene, can convert continually into quantity, coordinate position, the current"on"time of the controll plants such as draining submersible pump, three phase network dynamical balance feature is good.
Accompanying drawing explanation
Fig. 1 is the structure diagram of opening the little miniature immersible pump group control system of border morning and evening tides pilot system of the present invention more.
Fig. 2 is access submersible pump three phase network monitoring logic figure of the present invention.
Fig. 3 is water pump state transition graph of the present invention.
Fig. 4 is the flow chart of steps of opening the little miniature immersible pump group control method of border morning and evening tides pilot system of the present invention more.
Embodiment
Below in conjunction with accompanying drawing and specific implementation method, describe the present invention in detail, in exemplary embodiment and description of the present invention, be used for explaining the present invention, but not as a limitation of the invention.
The compositions such as the little miniature immersible pump group control system of border morning and evening tides pilot system Shi You tail-gate actuator, water-level instrumentation, decoder, relay and drive system, Special industrial control cabinet and computer, anti-jamming power-supply and submersible pump of opening of the present invention more.By group control system, can control the state of each submersible pump.
As shown in Figure 1, according to the needs of experimental study, on each border of default test model, arrange hundreds of small-sized or miniature immersible pumps.By the balance of calculated flow rate variation tendency and three phase network, determine the action of the quantity, orientation, border and the three phase network phase place that need opening and closing submersible pump.
In Fig. 1, tail-gate actuator 1 is comprised of D/A and V/I transducer, electric actuator, limnimeter and measuring system, tail-gate etc., and its effect is the operation of manufacturing a series of wave and promoting silt in model.
Limnimeter and measuring system 2, be comprised of accurate limnimeter and measurement and communicator, and its effect is the water level of measuring each water level website in test model, for the use of flow rate calculation.
Decoder 3, relay and drive system 4, by decoding circuit plate, electrical relaybox and driver, formed, its effect is computer by calculated with mathematical model with after analyzing, and indicates concrete submersible pump start and stop, to complete water inlet or the draining of model specified boundary.
Submersible pump group 5, the single phase alternating current 220V movable submersible pump group who is less than or equal to 1kW by power forms, and quantity can reach 500, and its effect has been water inlet or the draining of default test model specified boundary, to form the required tidal flow of experimental study.
Special industrial is controlled cabinet 6, by alloy aluminum or stainless steel, is manufactured, and requires to have certain intensity and anti-interference, and its effect is circuit board, device and the control apparatus etc. that various functions are installed.
Computer 7, requires to have certain intensity and anti-interference, and its effect is the softwares such as installation and operation mathematical model and monitoring and control.
Anti-jamming power-supply 8, exchanges anti-interference filtration power supply by ACLB and forms, and its effect is the interference effectively suppressing from ac power supply, to keep out the interference of the Fraquent starts such as motor, contactor.
Fig. 2 is access submersible pump three phase network monitoring logic figure of the present invention.Ka, Kb, Kc are respectively power switch device, and its effect is to cut-off power supply and monitor state.ZJ is relay group, and its effect has been A, B, C phase line break-make.JD is A.C. contactor, completes the start and stop of water pump.PPK is intelligent measuring and control device, carries out collection, the storage of data, and is connected with computer, completes communication and control function.
for constraint conditio, for every 1 submersible pump, its phase line is at any time closed only has A, B, C 1 phase in mutually, and other two-phase must disconnect, to guarantee not short circuit between phase line.
Fig. 3 is water pump state transition graph of the present invention.When water pump stops, water-head Δ H>0 being detected, water level is higher than predetermined value, and predetermined flow can not increase, i.e. Δ Q≤0, water pump continues to stop; When Δ H≤0, water level is lower than predetermined value, and predetermined flow be need increase Δ Q>0 time, starting mode of pump.When water pump operation, water-head Δ H≤0 detected, water level is lower than predetermined value, and predetermined flow needs to increase, i.e. Δ Q>0, water pump continues operation; As Δ H>0, water level is higher than predetermined value, and predetermined flow does not need to increase Δ Q≤0 o'clock, and water pump stops.
As shown in Figure 4, of the present inventionly open the little miniature immersible pump group control method of border morning and evening tides pilot system more, comprise the steps:
S10: Real-Time Monitoring passes in and out the flow on each border of default test model.
By limnimeter and measuring system, can measure the water level of each water level website in test model, for the use of flow rate calculation.
S20: computational analysis obtains the changes in flow rate trend result on each border.
The changes in flow rate trend result on each border of computational analysis can complete by computer.By computer, calculate the real time water level that detects and the water-head Δ H between predetermined water level, obtain the relation of real time water level and predetermined water level: detect real time water level equal predetermined water level or detect real time water level lower than predetermined water level or real time water level higher than predetermined water level.
S30: A phase, B phase, the C phase current of the three phase network of Real-Time Monitoring access submersible pump.
Detection is loaded on the three-phase data that the single phase alternating current simulation table of three phase network and the reading of digital watch can obtain three phase network.
S40: the dynamical balance feature of judgement three phase network, if three phase network is any one closed mutually, other two-phase disconnects, and performs step S50.
The dynamical balance feature logical equation of three phase network is:
Wherein: A---A phase power supply, B---B phase power supply, C---C phase power supply.
for constraint conditio.That is, for every 1 submersible pump, its phase line is at any time closed only has A, B, C 1 phase in mutually, and other two-phase must disconnect, to guarantee not short circuit between phase line.As long as can meet the requirement of balance logical equation, three phase network dynamical balance feature is good.
S50: according to changes in flow rate trend result, control submersible pump corresponding to orientation, corresponding border and open or closed condition, the time of opening or closing, the balance of maintenance three phase network.
Meeting under the requirement of dynamical balance feature logical equation, proposing next step quantity that needs opening and closing submersible pump, orientation, border and three phase network phase place action policy.The characteristic equation of submersible pump:
P
n+1represent the next state of submersible pump; P
nthe present condition that represents submersible pump; Δ H represents the water-head of real time water level and predetermined water level, that is, and and Δ H=H
in real time-H
given; Δ Q represents real-time theoretical delivery increment size.Δ H Δ Q=0 is constraint conditio, represents that the present condition of the party's bit stream state in test model and next state do not allow the state occurring.That is: when water level is high, also carry out enlargement discharge; Or when water level is low, also reduce flow.In the characteristic equation of submersible pump, " 0 " that Δ Q and Δ H are digital state or " 1 ".As shown in Figure 3, " 0 " in figure in circle represents that submersible pump stops, and " 1 " represents submersible pump unlatching.When submersible pump stops, water-head Δ H>0 being detected, water level is higher than setting value, and given flow can not increase, i.e. Δ Q≤0, submersible pump continues to stop; When Δ H≤0, water level is lower than setting value, and given flow be need increase Δ Q>0 time, and submersible pump starts.When submersible pump moves, water-head Δ H≤0 detected, water level is lower than setting value, and given flow needs to increase, i.e. Δ Q>0, submersible pump continues operation; As Δ H>0, water level is higher than setting value, and given flow does not need to increase Δ Q≤0 o'clock, and submersible pump stops.
By the present invention, effectively control and open border tidal flow simulation experiment system more, can adapt to all kinds of different monitored object, solved in opening boundary model the technical barrier of playback complexity morning and evening tides, trend exactly more; According to default test model, can convert continually into quantity, coordinate position, the current"on"time of the controll plants such as draining submersible pump.Because the phase line of every submersible pump A, B, the C phase line by corresponding equipment and three phase network contacts, due to
for constraint conditio, for every 1 submersible pump, its phase line is at any time closed only has A, B, C 1 phase in mutually, and other two-phase must disconnect, to guarantee not short circuit between phase line.The little phase line of submersible pump access current load that need are opened, the submersible pump turn-off current that need the are stopped large phase line of loading, to reach the balance of three phase network.By computer, can control corresponding relay, make the phase line of every submersible pump connect different phases according to the real work situation of electrical network, thereby kept the balance of three phase network.Through large-scale cooling water and the hydraulics gongwu model test of dozens of, prove that this systems technology is advanced, function admirable.Default test model comprises the parameters such as the position coordinate, watt level of border, each submersible pump, it refers in Design of Water Resources and Hydroelectric Projects and scientific research, the vast scale physical model of the specific scientific experimentation of carrying out in order to obtain some key data and regularity.
The technological scheme above embodiment of the present invention being provided is described in detail, applied specific case herein the principle of the embodiment of the present invention and mode of execution are set forth, above embodiment's explanation is only applicable to help to understand the principle of the embodiment of the present invention; , for one of ordinary skill in the art, according to the embodiment of the present invention, in embodiment and application area, all will change, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (7)
1., open the little miniature immersible pump group control method of border morning and evening tides pilot system more, it is characterized in that comprising the steps:
The flow on each border of the test model that Real-Time Monitoring is default with controlling turnover;
Computational analysis obtains the changes in flow rate trend result on each border;
A phase, B phase, the C phase current of the three phase network of Real-Time Monitoring access submersible pump, and control its cut-in method;
The dynamical balance feature of judgement three phase network, if three phase network is any one closed mutually, other two-phase disconnects, and carries out next step;
According to changes in flow rate trend result, control submersible pump corresponding to orientation, corresponding border and open or closed condition, the time of opening or closing, and the balance that keeps three phase network.
2. according to claim 1 open the little miniature immersible pump group control method of border morning and evening tides pilot system more, it is characterized in that: the border of described test model is comprised of concrete, timber, plastics or glass.
3. the little miniature immersible pump group control method of border morning and evening tides pilot system of opening according to claim 1 more, it is characterized in that, the flow that described Real-Time Monitoring passes in and out each border of default test model is by being installed on the water-level gauge on each border, by water level, be converted into flow and obtain, described water-level gauge comprises differential pressure transmitter and mechanical water-level gauge.
4. according to claim 1 open the little miniature immersible pump group control method of border morning and evening tides pilot system more, it is characterized in that, the changes in flow rate trend result that described computational analysis obtains each border comprises three:
Real time water level detected higher than predetermined water level, real time water level detected and equal predetermined water level or real time water level detected lower than predetermined water level.
5. the little miniature immersible pump group control method of border morning and evening tides pilot system of opening according to claim 1 more, it is characterized in that, A phase, B phase, the C phase current of the three phase network of described Real-Time Monitoring access submersible pump comprises that detection is loaded on the single phase alternating current simulation table of three phase network and the reading of digital watch.
6. according to claim 5 open the little miniature immersible pump group control method of border morning and evening tides pilot system more, it is characterized in that, described submersible pump comprises that power is less than or equal to the single phase alternating current 220V movable submersible pump of 1kW.
7. the little miniature immersible pump group control method of border morning and evening tides pilot system of opening according to claim 1 more, it is characterized in that, the balance of described maintenance three phase network comprises: the little phase line of submersible pump access current load of need opening, the submersible pump turn-off current that need the are stopped large phase line of loading.
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| US5732657A (en) * | 1995-04-03 | 1998-03-31 | Idbeis; Badr | Aquarium sea current generator |
| CN101013532A (en) * | 2006-12-20 | 2007-08-08 | 南京大学 | Automation equipment for simulating tide motion of beach |
| CN101403918A (en) * | 2008-11-10 | 2009-04-08 | 中国水利水电科学研究院 | Automatic control device and control method for maritime works model tide simulation |
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2014
- 2014-06-16 CN CN201410268313.5A patent/CN104005945B/en not_active Expired - Fee Related
Patent Citations (4)
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|---|---|---|---|---|
| US4812077A (en) * | 1987-12-17 | 1989-03-14 | The Great Wave Company, Inc. | Pneumatic/hydraulic wave generator |
| US5732657A (en) * | 1995-04-03 | 1998-03-31 | Idbeis; Badr | Aquarium sea current generator |
| CN101013532A (en) * | 2006-12-20 | 2007-08-08 | 南京大学 | Automation equipment for simulating tide motion of beach |
| CN101403918A (en) * | 2008-11-10 | 2009-04-08 | 中国水利水电科学研究院 | Automatic control device and control method for maritime works model tide simulation |
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| 刘敏: "TKJ-1潮汐模拟自动控制系统", 《广东水电科技》 * |
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