CN103529695A - Variable-frequency speed regulation water supply system based on day parting intelligent PID (proportion integration differentiation) regulator - Google Patents
Variable-frequency speed regulation water supply system based on day parting intelligent PID (proportion integration differentiation) regulator Download PDFInfo
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Abstract
The invention discloses a variable-frequency speed regulation water supply system based on a day parting intelligent PID (proportion integration differentiation) regulator. The water supply operation mode of a conventional variable-frequency control system is changed, the original all-day 24h constant-pressure variable-flow-rate water supply mode without water consumption peak or valley is changed into the variable-pressure variable-flow-rate water supply mode for dividing the original full-day 24h water supply into the water supply in several regulation time periods of peak, sub peak, valley, sub valley, balance, sub balance and the like, a great amount of electric energy and water consumption is reduced, the service life of the water supply process equipment and the service life of a pipe network pipeline are prolonged, in addition, the occurrence of faults of pipeline line perforation and the like caused by too high pipe network pressure of the water supply system due to constant-pressure water supply operation of the conventional variable-frequency control system in the water consumption valley time period is avoided, the reliable water supply in the water consumption peak period is also ensured, and the system conforms to the requirements of great supply amount, low loss, consumption reduction and efficiency increase initiated by water supply industry.
Description
Technical field
The present invention relates to water system technical field, particularly, relate to a kind of based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times.
Background technology
Conventional type PID regulator, pressure of supply water parameter is set to a fixed value, force value when this value is variable-frequency speed-regulating water supply system whole day (24 hours) water use peak, conventional type PID regulator will regulate according to this fixed value; Regulator can not carry out adjusting of force value automatically according to water pressure demand amount size, and adjusting of PID controller parameter generally needs scene to complete, and real-time is poor, can not meet the online requirement that regulates in real time, i.e. time and effort consuming, and the effect of adjusting is poor.
Conventional PID controls: routine is that traditional PID adjustment is controlled, and is to produce a kind of control method the earliest, the wide model of application in working control engineering in automatically controlling.Yet, traditional pid control algorithm has its limitation and weak point, only in the situation that system model parameter becomes while being non-, could obtain desirable effect, when being applied to time-varying system, the degradation of system, requirement is controlled in the adjusting that can not meet system self-adaption.In addition, in to pid parameter tuning process, often can not get optimal value of overall importance.Therefore, this adjusting is controlled and cannot be solved dynamic water supply demand and energy-saving and cost-reducing requirement.
In classical control system, it is that algorithm is fairly simple, function is fairly perfect, the reasonable a kind of control algolithm of effect that PID controls, and its general type is:
u(n)=K
pe(n)+K
I∑e(n)+K
DΔe(n) (1)；
In formula: n is sampling sequence number; The controller output that u (n) is the n time sampling instant; The deviation of the n time sampling instant of e (n) input; The deviation that the deviation of the n time sampling instant of Δ e (n) input and the n-1 time sampling instant are inputted poor; K
pproportional gain; K
iintegral coefficient (K
i=K
pt/T
i); K
ddifferential coefficient (K
d=K
pt
d/ T); T is a sampling period, T
i, T
dbe respectively integration time constant and derivative time constant.
While being water supply flow variation due to control object, its variation range is very large, if adopt one group of fixing pid parameter, the control effect of each water supply flow variation zone can not be taken into account, and controls effect poor.
In realizing process of the present invention, inventor finds at least to exist in prior art bad dynamic performance, energy-saving effect is poor and control the defects such as weak effect.
Summary of the invention
The object of the invention is to, for the problems referred to above, propose a kind ofly based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, to realize, dynamic property is good, good energy-conserving effect and the effective advantage of control.
For achieving the above object, the technical solution used in the present invention is: a kind of based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, comprise for by the comparer that gathers gained Monitoring Data y and setting data group R and compare, and the intelligent controller being connected with the output terminal of described comparer successively, pressure of supply water acquisition module and data detection module; The output terminal of described data detection module is connected with the feedback input end of comparer, for gathering gained Monitoring Data y to comparer input; The first input end of described intelligent controller is connected with the output terminal of comparer, and the first output terminal of intelligent controller is connected with the input end of pressure of supply water acquisition module, and the second output terminal of intelligent controller is connected with the main frame of frequency converter, to realize speed regulating control.
Further, above-described based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, also comprise the fuzzy rule and the reasoning module that are connected with the output terminal of described comparer and the second input end of intelligent controller respectively; Described fuzzy rule is connected with the first input end of reasoning module and the output terminal of comparer, and fuzzy rule is connected with the output terminal of reasoning module and the second input end of intelligent controller, has solved the conventional PID controller operational factor of can not adjusting in real time online.
Further, above-described based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, also comprise the differentiator d/dt being connected with the second input end of reasoning module with fuzzy rule with the output terminal of described comparer respectively, solve conventional PID controller for non-linear, time the control problem that complication system and the unclear system of model can not be level and smooth that becomes.
Further, described intelligent controller, comprise and can realize PID controller or the programmable digital regulator that intelligent segmentation is controlled, the given control of a kind of data acquisition that utilizes fuzzy logic and reasoning module to change to realize according to the actual demand of output is the concrete application of fuzzy set theory in " constant-pressure variable " controlled for water running.
Further, described PID controller, be specially pressure of supply water dynamic adjustments intelligent PID controller, according to whole day 24 hourly consumptions, change and carry out formalization processing and introduce control procedure, use again tighter mathematics manipulation, realize fuzzy reasoning, judge decision-making, to reach gratifying control result.
Further, described pressure of supply water acquisition module, comprise the pressure transducer that is arranged on water system switch place, the PID controller of thereafter the intelligent segmentation forming according to fuzzy set theory, single-chip microcomputer control technology research and development set being controlled is applied to constant pressure water supply operation and regulates Guaranteed.
Further, described data detection module, comprise the filtration module and the A/D module that are connected in turn between the output terminal of pressure of supply water acquisition module and the feedback input end of comparer, solved the PID controller that conventional water supply adopts, can only supply water and between centrifugal pump minimum injection rate and maximum pump discharge, carry out the tracking adjusting of set pressure at separate unit, can not meet water consumption and present the demand that stepped jump changes, the control output function of the system that complicates while not possessing, cannot adapt to Continuous Tracking, adjustment automatically, the steadily control requirement of water supply, reliability service.
Various embodiments of the present invention based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, owing to comprising for by the comparer that gathers gained Monitoring Data y and setting data group R and compare, and the intelligent controller being connected with the output terminal of comparer successively, pressure of supply water acquisition module and data detection module; The output terminal of data detection module is connected with the feedback input end of comparer, for gathering gained Monitoring Data y to comparer input; The first input end of intelligent controller is connected with the output terminal of comparer, and the first output terminal of intelligent controller is connected with the input end of pressure of supply water acquisition module; Can change and measure range according to pressure of supply water and flow range, improve measuring accuracy, change arbitrarily upper and lower limit setting value; Thereby can overcome bad dynamic performance in prior art, energy-saving effect is poor and controls the defect of weak effect, to realize, dynamic property is good, good energy-conserving effect and the effective advantage of control.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the present invention.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, for explaining the present invention, is not construed as limiting the invention together with embodiments of the present invention.In the accompanying drawings:
Fig. 1 the present invention is based on the control structure block diagram of the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times;
Fig. 2 the present invention is based on PID in the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times to control pressure of supply water curve map;
Fig. 3 is the principle comparative graph that the present invention is based on pump energy saving in the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Building energy-efficient society is current question of common concern, the energy-saving application of intelligence segmentation PID in variable-frequency speed-regulating water supply system, for guaranteeing 24 hours uninterrupted water supply the in Oilfield Mining Area, when water use peak and low ebb, by intelligent segmentation PID, regulate to control according to large young pathbreaker's pressure of supply water of user's water consumption and carry out segmentation, different pressure of supply water corresponding to period; By increase or the minimizing of the further differential centrifugation revolution speed of frequency converter, adjusting water supply flow; By traditional " constant voltage-variable " water supply method of operation, change into " transformation-variable " method of operation, the invalid pressure difference value while dwindling water use peak and low ebb, the target that reaches saves energy, reduces equipment loss, extends the water facilities use and maintenance cycle.
By the circumscribed analysis in variable-frequency speed-regulating water supply system is used of the PID to conventional, according to the embodiment of the present invention, as shown in Figure 1-Figure 3, provide a kind of based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times.Should, based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, propose to control with intelligent segmentation PID; Intelligence segmentation PID automatic regulation controller, according to pressure of supply water and flow range, can change measurement range, improves measuring accuracy; Can change arbitrarily upper and lower limit setting value, and conventional conventional PID control cannot realize these functions; Intelligence segmentation PID controls has extraordinary power savings to raising water supply efficiency of centrifugal pump, reduction power consumption.
As shown in Figure 1-Figure 3, the present embodiment based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, can comprise for by the comparer that gathers gained Monitoring Data y and setting data group R and compare, and the intelligent controller being connected with the output terminal of comparer successively, pressure of supply water acquisition module and data detection module; The output terminal of data detection module is connected with the feedback input end of comparer, for gathering gained Monitoring Data y to comparer input; The first input end of intelligent controller is connected with the output terminal of comparer, and the first output terminal of intelligent controller is connected with the input end of pressure of supply water acquisition module.
Above-described embodiment based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, can also comprise the fuzzy rule and the reasoning module that are connected with the output terminal of comparer and the second input end of intelligent controller respectively; Fuzzy rule is connected with the first input end of reasoning module and the output terminal of comparer, and fuzzy rule is connected with the output terminal of reasoning module and the second input end of intelligent controller; Can also comprise the differentiator d/dt being connected with the second input end of reasoning module with fuzzy rule with the output terminal of comparer respectively.
Above-mentioned intelligent controller, comprises and can realize PID controller or the programmable digital regulator that intelligent segmentation is controlled.Pressure of supply water acquisition module, comprises the pressure transducer that is arranged on water system switch place.Data detection module, comprises the filtration module and the A/D module that are connected in turn between the output terminal of pressure of supply water acquisition module and the feedback input end of comparer.
For example, above-mentioned PID controller, is specially pressure of supply water dynamic adjustments intelligence segmentation PID controller.Pressure of supply water dynamic adjustments intelligence segmentation PID controller acts on and being mainly presented as in supply water production and energy-saving run:
Operating constant voltage (setting in advance constant pressure) variable (flow) method of operation will supply water, change the whole day transformation of different periods (different period pressure of supply water values are different) variable (flow) method of operation into, namely in thering is the water system of variable frequency control, according to the output of different periods of whole day, change requirement, to pressure of supply water, flow is carried out regulating relatively in real time of two variablees, both met users' water demand of peak period, avoid again the energy dissipation causing because of pressure higher (pressure setting is to set according to the pressure maximal value of 24 hours certain period waters of whole day) at water low-valley interval, be the too high supply equipment of force value do idle.Pressure of supply water dynamic adjustments intelligence segmentation PID controller is exactly mainly to reduce supply equipment energy consumption in the effect of supplying water in producing, and extends the life cycle of supply equipment, guarantee water system continuously, stable, economy, reliability service.Pressure of supply water dynamic adjustments intelligence segmentation PID controller be a kind of of many uses, arrange conveniently, the utmost point has the intelligent regulating device of application prospect.
About pressure of supply water dynamic adjustments intelligence segmentation PID controller, at the energy-conserving action supplying water in producing, be described as follows:
(1) brief principle:
Pressure of supply water dynamic adjustments intelligence segmentation PID controller, is mainly by traditional analog pid regulator, the formations such as the automatic setter of real-time pressure value, pressure unit, frequency converter control system.PID controller, the automatic setter hardware circuit of real-time pressure value are mainly comprised of one-chip computer and related peripheral control circuit, work out respectively parameter group, and be distributed into several time periods according to PID range of adjustment.Single-chip microcomputer is according to the working procedure of establishment, regularly arrange, peek and give pid parameter group, controller is adjusted according to the pid parameter adjustment of new assignment, by after several periodic oscillation, system enters steady state (SS), now system just obtains one group of new pid parameter value and exports to frequency conversion speed-adjusting system from adjusting, as the new data group of converting operation, thereby regulate make-up pump motor speed, reduce the pressure of supply water of non-water use peak phase, reduce electric energy input, reach energy-saving and cost-reducing object.
Pressure of supply water dynamic adjustments intelligence segmentation PID controller is in the application of water supply industry, changed the water supply operational mode of industry routine, by 24 hours constant pressure water supply modes regardless of water use peak and low ebb of original whole day, the whole day constant pressure water supply of passing by, changing into whole day is peak, secondary peak, paddy, inferior paddy, flat, several period variable pressure and flows of inferior equality supply water, both a large amount of conserve energy consumption, extended again the serviceable life of equipment, and the too high faults such as conduit wiring piercing that cause of water system ductwork pressure while having avoided because of water low ebb, reliable water supply while having guaranteed again water use peak, meet " supplying that water supply industry freely leads more, few damage, consumption reduction, synergy " requirement.
(2) principal feature:
Pressure of supply water dynamic adjustments intelligence segmentation PID controller, can realize the automatic assignment of pid parameter group automatically, and new pid parameter, within very short time, by entering steady state (SS) few oscillation period of trying one's best, and is avoided to self-sustained oscillation.When automatic assignment, adopt standard time clock, with lookup table mode, carry out assignment, be that computing machine wants the assignment of Query Database whether to have new assignment in each cycle of operation, if with after original setting value, equate, computing machine continue to be carried out master routine, after assignment subroutine is finished, computing machine returns to master routine again.
When adjusting is adjusted, adopting " certainly adjusting " state, is mainly artificial intelligence networked tuning function (NNAT), fuzzy deduction and intelligent setting function.At PID, controlling is that in master's coefficient, the principal element that affects system dynamic and static performance indices is the ratio system K in proportional-integral-differential link, integration time constant Ti and derivative time constant Td.Generally speaking, Proportional coefficient K affects the rapidity of system, regulated variable and response time and static error size.The size of integration time constant Ti has a direct impact the size of the response time of system, adjustment time, overshoot and overshoot number of times, when increasing, eliminates Ti the process of static difference by slowing down, but can overshoot improve stability, the effect of differential contributes to reduce overshoot, overcome vibration, system is tended towards stability, it accelerates system acting speed, reduce, thereby improve dynamic performance.
(3) application prospect:
Pressure of supply water dynamic adjustments intelligence segmentation PID controller is a kind of broad-spectrum automation equipment, it not only can be applied in water supply industry, because this device has secondary development function, so being done to some suitable exploitations, its application software just may be used on other industry, as the power-saving running of oil pumper, the lighting energy saving of public street lamp is controlled etc.This project is by the practical application in the production run of North China Oilfield water supply industry, solved production run required, good economical, societal benefits have been obtained again, saved electric energy, reduce feed water consumption, extended the use and maintenance cycle of water facilities, improved Oilfield Mining Area water system reliability of operation, guarantee 24 hours continuous, stable, the economic water supply in Oilfield Mining Area, there are significant economical, societal benefits.
In the variable-frequency speed-regulating water supply system based on INTELLIGENT PID REGULATOR at times of above-described embodiment, intelligence segmentation PID auto-adjustment control is the requirement according to controlled device, the pid parameter value of different periods of subsection setup, requirement according to the force value in water supply peak and low ebb period, the pid parameter value of different periods of subsection setup, according to the force value in water supply peak and low ebb period, automatically to carry out force value given; Change 24 hours constant pressure water supply methods of operation regardless of water use peak and low ebb of whole day, by " constant voltage-variable " in past, supply water and change " transformation-variable " into and supply water; Intelligence segmentation PID has artificial intelligence networked tuning function (Nnat), and fuzzy deduction and intelligent setting function can be to measuring the processing such as range of control zooms in or out.
Conventional PID control method, has certain dynamic responding speed, but exist, easily occurs that system overshoot and response speed wait deficiency not.Adopt fuzzy theory to control with PID the method combining, can make to regulate more accurate effective, because fuzzy control has been implied with the differential action, therefore the differential part in PID controller no longer adds the adjusting of system to control, therefore the response time accelerates, and has shortened PID controller and has entered the time of stable state.In the variable-frequency speed-regulating water supply system based on INTELLIGENT PID REGULATOR at times of above-described embodiment, referring to Fig. 1, Intelligent PID Control process is as follows:
Intelligence segmentation PID auto-adjustment control is to adopt sinusoidal rectifying and wave-filtering mode to detect, gathering Monitoring Data y and setting data group R compares, system is adjusted on PI basis, utilizes the method for segmentation variable coefficient to carry out, when the deviation of system is larger, and integrating system (K
i) and scale-up factor (K
p) also larger; When the deviation of system hour, integral coefficient and scale-up factor are also less.
In the variable-frequency speed-regulating water supply system based on INTELLIGENT PID REGULATOR at times of above-described embodiment, Intelligent PID Control model is as follows:
Intelligent PID Control, be that its parameter is automatically adjusted in best pressure of supply water value, realized Based Intelligent Control and regulate with the difference of water supply flow, 24 hours fluctuations in discharge scopes of whole day can be divided into high, medium and low 31 sections, and by response curve method, obtain object at the mathematical model of each flow section respectively, its form is:
G
i=K
i.e
-τiS／(T
iS+1)，i＝″1″，2，3 (2)；
In mathematical model: K
i, T
i, τ
ican try to achieve by experimental formula in following list 1 the best pid parameter value of regulator of each water supply flow section;
table 1: the experimental formula of being asked best pid parameter by response curve
K
i=(ΔY
i／(Y
max-Y
min))／(ΔX
max-X
min) (3)
" Y
max-Y
min" for measuring gauge outfit range ability; " X
max-X
min" be regulator output area.
In addition, expert's self-setting function that also can utilize programmable digital regulator (SLPC) self to have in different flow district, carries out automatic optimal selection to pid parameter; For conventional simulation PID regulator, whole flow district can only adopt same pid parameter to control.
In Intelligent PID Control, adopt programmable digital regulator (SLPC) can realize the setting of intelligent segmentation pid parameter; By the different pid parameters that calculated by table 1, by the PID control set-point shown in Fig. 2, be organized in working procedure and go; By corresponding functional module in CPU single-chip microcomputer and software package, obtain program flow changing curve, using this outer given signal as regulator to realize basic control function.
Single-chip microcomputer is worked out respectively parameter group according to PID range of adjustment, and be divided into some time periods, be organized in runtime subroutine form district, CPU is when setting arrives constantly, parameters data in form district are taken out, revest pid parameter group, intelligent PID auto-adjustment control is adjusted according to the pid parameter adjustment of new assignment, immediately by after several periodic oscillation, system enters steady state (SS), now system just obtains one group of new pid parameter and flows to frequency converter timing system from adjusting, as frequency converter, move new data group, thereby regulate motor centrifugal pump rotating speed, reduce electric power consumption, reduce pressure of supply water and the water supply flow of non-water use peak phase, reduce the input of electrical network electric energy, reach energy-saving and cost-reducing object.
Energy-saving principle after pressure decreased in water pump operation: water pump is in operation and changes the operational factors such as position, flow, lift (or pressure) of running operating point, just can adapt to the needs of new working condition.The operating point of water pump is to be determined by the intersection point of pump performance curve and resistance curve of pipe line.Therefore,, as long as the shape of one of these two curves or position change, the position of operating point also just changes thereupon.So the adjusting of water pump, changes pump operating point by change pump performance curve or resistance curve of pipe line in principle and realizes.As shown in Figure 3, water pump curve 4 is pump operation operating points with the intersection point A of resistance curve of pipe line 3.When valve is controlled and to be carried out throttling and regulate, owing to will reducing flow, while closing minor valve, frictional resistance becomes large, and resistance curve of pipe line moves on to 2 from 3, and operating point moves to B point from A point, and lift is from H
abe raised to H
b, flow is from Q
abe reduced to Q
b; When speed regulating control is carried out speed change adjusting, resistance curve 3 is constant.Pump characteristics depends on rotating speed, if speed from n
4drop to n
6, running operating point moves to C point from A point, and lift is from H
adrop to H
c, flow is from Q
abe reduced to Q
c.
So, in often changing the water pump of variable parameter operation, by the power-economizing method that regulates its rotating speed to change operating mode, be very effective.The principle of variable frequency regulating speed control is described by the relation between flow Q, lift H, shaft power P and the rotation speed n of water pump.
Relational expression between Q, H, P and n is:
Q
A／Q
B=n
4／n
6 (4)
H
A／H
B=(n
4／n
6)
2 (5)
P
A／P
B=(n
4／n
6)
3 (6)
Visible, square being directly proportional of lift H (pressure) and rotation speed n, shaft power P and rotating speed
ncube be directly proportional.When rotating speed declines 1/2 time, power declines 1/8, and power becomes the reduction of cube relation with rotating speed.Visible, reducing rotating speed is the highly effective power-economizing method that power is declined.
Rig-site utilization situation: intelligent segmentation PID auto-adjustment control is applied in the frequency conversion system of ten water stops such as two hospitals under water and electricity supply center, wantonly seven water stops, office East, transportation respectively, actual water supply operating pressure value reduces 14%-19% with former setup pressure value respectively, and power savings is very remarkable.Operational factor record is in Table 2.
table 2: water supply operational factor contrast table before and after intelligent segmentation PID controls and uses
From the service data of table 2 record, can find out, the power saving rate of intelligent segmentation PID auto-adjustment control, on average more than 10%, has obvious power savings.
In sum, the various embodiments described above of the present invention based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, the feature changing for Oilfield Mining Area water supply production run water consumption, by to conventional PID and intelligent segmentation PID the working condition in frequency-conversion water supply system carried out detailed comparative analysis, the Energy saving mechanism while drawing intelligent segmentation PID regulating and controlling; Then, according to statistics and correlation curve, illustrate in the water system of Oilfield Mining Area, apply intelligent segmentation PID regulating and controlling technology water stop centrifugal pump is regulated in real time, can obtain significant energy-saving effect and considerable economic benefit.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. one kind based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that, comprise for by the comparer that gathers gained Monitoring Data y and setting data group R and compare, and the intelligent controller being connected with the output terminal of described comparer successively, pressure of supply water acquisition module and data detection module; The output terminal of described data detection module is connected with the feedback input end of comparer, for gathering gained Monitoring Data y to comparer input; The first input end of described intelligent controller is connected with the output terminal of comparer, and the first output terminal of intelligent controller is connected with the input end of pressure of supply water acquisition module, and the second output terminal of intelligent controller is connected with frequency converter main frame, to realize speed regulating control.
2. according to claim 1ly based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that, also comprise the fuzzy rule and the reasoning module that are connected with the output terminal of described comparer and the second input end of intelligent controller respectively; Described fuzzy rule is connected with the first input end of reasoning module and the output terminal of comparer, and fuzzy rule is connected with the output terminal of reasoning module and the second input end of intelligent controller.
3. according to claim 2ly based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that, also comprise the differentiator d/dt being connected with the second input end of reasoning module with fuzzy rule with the output terminal of described comparer respectively.
According to described in any one in claim 1-3 based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that described intelligent controller comprises and can realize PID controller or the programmable digital regulator that intelligent segmentation is controlled.
5. according to claim 4 based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that described PID controller is specially pressure of supply water dynamic adjustments intelligent PID controller.
According to described in any one in claim 1-3 based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that, described pressure of supply water acquisition module, comprises the pressure transducer that is arranged on water system switch place.
According to described in any one in claim 1-3 based on the variable-frequency speed-regulating water supply system of INTELLIGENT PID REGULATOR at times, it is characterized in that, described data detection module, comprises the filtration module and the A/D module that are connected in turn between the output terminal of pressure of supply water acquisition module and the feedback input end of comparer.
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| CN106452016A (en) * | 2016-11-01 | 2017-02-22 | 重庆承亿机电设备有限公司 | Frequency converter multi-PID target automatic control method |
| CN106499009A (en) * | 2016-11-29 | 2017-03-15 | 常熟开关制造有限公司(原常熟开关厂） | A kind of intelligent water supply device and method |
| CN108227480A (en) * | 2017-12-27 | 2018-06-29 | 杭州春江阀门有限公司 | A kind of variable output pressure pressure reducing valve closed-loop control system |
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| CN106452016A (en) * | 2016-11-01 | 2017-02-22 | 重庆承亿机电设备有限公司 | Frequency converter multi-PID target automatic control method |
| CN106452016B (en) * | 2016-11-01 | 2018-10-09 | 重庆承亿机电设备有限公司 | The more PID target autocontrol methods of frequency converter |
| CN106499009A (en) * | 2016-11-29 | 2017-03-15 | 常熟开关制造有限公司(原常熟开关厂） | A kind of intelligent water supply device and method |
| CN106499009B (en) * | 2016-11-29 | 2019-05-24 | 常熟开关制造有限公司(原常熟开关厂） | A kind of intelligent water supply device and method |
| CN108227480A (en) * | 2017-12-27 | 2018-06-29 | 杭州春江阀门有限公司 | A kind of variable output pressure pressure reducing valve closed-loop control system |
| CN108286525A (en) * | 2017-12-29 | 2018-07-17 | 南京钢铁股份有限公司 | Water supply frequency conversion pump group running frequency optimization method |
| CN113805477A (en) * | 2020-06-12 | 2021-12-17 | 中国石油天然气股份有限公司 | PID (proportion integration differentiation) setting method and device for oil and gas pipeline pressure regulating equipment |
| CN113805477B (en) * | 2020-06-12 | 2024-05-28 | 中国石油天然气股份有限公司 | PID setting method and device for oil and gas pipeline pressure regulating equipment |
| CN113778141A (en) * | 2021-08-05 | 2021-12-10 | 浙江省机电设计研究院有限公司 | Fluid pipeline flow control system controlled by segmented PID |
| CN113778141B (en) * | 2021-08-05 | 2023-10-13 | 浙江省机电设计研究院有限公司 | Fluid pipeline flow control system with sectional PID control |
| CN113789829B (en) * | 2021-09-15 | 2024-03-19 | 广东科力水务技术股份有限公司 | District water supply method and system based on big data |
| CN113789829A (en) * | 2021-09-15 | 2021-12-14 | 王达 | Big data-based community water supply method and system |
| WO2023116206A1 (en) * | 2021-12-23 | 2023-06-29 | 无锡汇田水务科技有限公司 | Water-pressure control method, secondary water supply system, electronic device and storage medium |
| CN115478587A (en) * | 2022-10-31 | 2022-12-16 | 内蒙古智能煤炭有限责任公司 | Constant-pressure water supply system for coal mine safety production |
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