CN104088781A - Frequency conversion and energy saving monitoring system for water source well of oil field - Google Patents
Frequency conversion and energy saving monitoring system for water source well of oil field Download PDFInfo
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- CN104088781A CN104088781A CN201410321177.1A CN201410321177A CN104088781A CN 104088781 A CN104088781 A CN 104088781A CN 201410321177 A CN201410321177 A CN 201410321177A CN 104088781 A CN104088781 A CN 104088781A
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Abstract
The invention belongs to the technical field of energy saving monitoring electric equipment and particularly provides a frequency conversion and energy saving monitoring system for a water source well of an oil field. The frequency conversion and energy saving monitoring system comprises an electric submersible pump, an asynchronous motor driving the electric submersible pump and a water outlet pipeline connected with the electric submersible pump. A pressure transmitter is arranged on the water outlet pipeline at a wellhead, measures pressure of outlet water, and converts the pressure of outlet water into a 4mA-20mA electric signal. The pressure transmitter is electrically connected with an I/ O module of a PLC, and the I/ O module of the PLC is electrically connected with an operation panel of a frequency converter to control the frequency converter connected with and controlling the asynchronous motor. The frequency conversion and energy saving monitoring system has the advantages that energy saving effect is obvious, loss of a power supply circuit is reduced, load capacity of the pressure transmitter is improved, and mechanical shock loss of the electric submersible pump and the asynchronous motor is reduced. Accordingly, the reliable energy saving monitoring device is provided for normal production of the oil field.
Description
Technical field
The invention belongs to energy-saving monitoring technical field of electrical equipment, be specifically related to the water supply well energy-saving and frequency-variable supervisory system of using in a kind of oil field.
Background technique
At present, the problem that known oil field water supply well mainly exists has:
Existing water supply well down-hole electric submersible pump model is 130ZTQ20-400～700, electric submersible pump asynchronous motor YQS200-45 to YQS200-75, minimum asynchronous electric acc power 45KW, maximum asynchronous motor 75KW, water outlet tubing string adopts φ 76 * 5.5 oil pipes, and cable adopts 35 mm
2～50mm
2water-proof cable, ground control cabinet adopts from even reduced-voltage starting, and control cabinet power is 55～75KW, because the pump capacity of most of water supply well is large, pipeline designs specification is little, the defect that causes pump capacity and pipeline designs specification not to match.The actual load of electric submersible pump is much smaller than its rated power, and the operating mode in low load with strong power, caused the phenomenons such as throttling operation or reverse pumping backflow, and power factor is little, and because not taking corresponding conservation measures, waste electric energy is very serious.
Electric submersible pump controlling method is simple, adopts from even reduced-voltage starting, and poor reliability, circuit often breaks down, and controlling method is single, directly affects normally carrying out that water supply well supplies water earthward.
Water supply well is because being unkitted Level monitor, producing fluid level cannot detect, during each well workover, can only observe hydrostatic level by outlet pipe, because of water, drain and can not automatically disconnect electricity every year, cause the electric submersible pump burning out to account for 65% left and right that annual whole water supply well electric submersible pump damages, electric submersible pump idle running is dangerous, also exist the problem of a large amount of electric energy of waste simultaneously, result causes that the property phase in well workover week is short, expense is high, and well puller's labor intensity is large, water supply well insufficient water, to stratum water injection rate, reduce, had a strong impact on completing of crude output.
Summary of the invention
The object of the invention is to overcome in prior art because oil field water supply well electric submersible pump is not taked conservation measures the problem that while causing the serious and water of waste of energy to drain, electric submersible pump idle running can not auto-breaking.
For this reason, the invention provides the water supply well energy-saving and frequency-variable supervisory system of using in a kind of oil field, comprise electric submersible pump, the asynchronous motor that drives electric submersible pump and the water outlet pipeline being connected with electric submersible pump, above-mentionedly go out on well head water pipeline pressure transmitter is installed, described pressure transmitter records discharge pressure and is translated into 4～20mA electrical signal; Pressure transmitter is electrically connected to the I/O module of PLC; The I/O end module of PLC connects frequency-changer operation panel and controls frequency variator, and frequency variator connects controls asynchronous motor;
The well head water outlet pipeline that described electric submersible pump connects is provided with liquid level sensor, and described fluid level transmitter is electrically connected to the I/O module of PLC;
On described well head water outlet pipeline, be provided with the flowmeter being electrically connected to the I/O module of PLC.
In the I/O module of described PLC2, be provided with 7 input ports and 10 output ports.
7 described input ports comprise 2 digital quantity input ports and 5 analog input ports; 10 described output ports comprise 9 digital quantity output ports and 1 analog output port.
Frequency variator is ABB frequency variator, adopts ACS510 series, and rated capacity is 55～90KW.
Beneficial effect of the present invention: the water supply well energy-saving and frequency-variable supervisory system that this oil field provided by the invention is used, energy-saving effect is remarkable, electric submersible pump power factor is brought up to more than 0.95, integrated power-saving rate reaches more than 20%, reduce the loss of power supply line simultaneously, increased the load capacity of transformer; Impact and the impact of overpressure to pipe network system of Current on Grid when opening, shutting down, have been reduced; Reduced the mechanical shock loss of electric submersible pump, asynchronous motor self.Guaranteed water supply well normal water supply, to normally the carrying out of stratum water filling, what guaranteed to produce is unblocked, for oil field normalization is provided by the reliable energy-saving monitoring equipment of providing.
Below with reference to accompanying drawing, the present invention is described in further details.
Accompanying drawing explanation
Fig. 1 is the essential characteristic figure schematic diagram of control system of invariable pressure;
Fig. 2 is the performance curve figure of pipe network and electric submersible pump;
Fig. 3 is the control flow schematic diagram of electric submersible pump;
Fig. 4 is Frequency Converter Control wiring diagram;
Fig. 5 is the peripheral wiring diagram of PLC and expansion module;
Fig. 6 is control loop wiring diagram of the present invention;
Fig. 7 is terminal connection chart of the present invention.
Description of reference numerals: 1, pressure transmitter; 2, PLC; 3, frequency variator; 4, asynchronous motor; 5, electric submersible pump; 6, soft initiator.
Embodiment
Embodiment 1:
In order to make the water system stable operation of water supply well, water system must meet lift characteristic and pipe resistance characteristic simultaneously.Lift characteristic is not become prerequisite with the valve opening in system pipeline, shows electric submersible pump relation curve between lift H and flow Q under a certain rotating speed.Lift characteristic reflects is lift H and with being related to H=f (Q) between water flow Q.
Pipe resistance characteristic is that the rotating speed with electric submersible pump does not become prerequisite, shows valve relation curve between lift H and flow Q under a certain aperture.Pipe resistance characteristic has reflected that the energy of electric submersible pump is used for overcoming the Changing Pattern of the water level of electric submersible pumping system and pressure difference, water flow resistance in pipeline.Change valve opening, be actually and changed under a certain lift, water system is to user's water supply capacity.
Therefore, pipe resistance characteristic reflects is to be related to H=f (Qc) between lift and water supply flow Qc.The intersection point of heat-capacity curve and pipe resistance characteristic curve, is called the operation point of water system, and as shown in Figure 1, a curve represents pipe resistance characteristic, and b curve represents lift characteristic, the work electricity that the intersection point of a curve and b curve is water system, i.e. A point.In this point, with the water supply flow Qc of water flow Qu and water system, in state of equilibrium, water system had both met lift characteristic, had also met pipe resistance characteristic, system stable operation.
In water system, the control flow of conventionally take is object, and conventional controlling method is that valve is controlled method and rotating speed is controlled method.
Valve control method is under the prerequisite remaining unchanged at electric submersible pump asynchronous motor speed, by controlling opening of valve, carrys out adjust flux, its essence is that the drag size by changing in water route changes flow.Therefore, pipe resistance changes the change with valve opening, but lift characteristic is constant.In actual used water operating mode, water requirement changes, if valve opening remains unchanged within a period of time, must cause the appearance of superpressure or under-voltage phenomenon.
Rotating speed control method is under the prerequisite remaining unchanged in valve opening, by change, drives the rotating speed of the asynchronous motor of electric submersible pump to carry out adjust flux, its essence is by changing the kinetic energy of water and changes flow.Therefore, lift characteristic changes the change with electric submersible pump rotating speed, but pipe resistance characteristic is constant.Frequency modulation water supply mode belongs to rotating speed and controls, its working principle is according to water working conditions change, automatically to adjust the rotating speed of electric submersible pump asynchronous motor, make ductwork pressure remain constant, when the water yield increases, asynchronous motor accelerates, and when the water yield reduces, asynchronous motor slows down.
From fluid mechanics, the output power P of electric submersible pump is directly proportional to the hydraulic pressure H of pipe network and the product of water flow Q; The rotation speed n of electric submersible pump is directly proportional to water flow Q; The hydraulic pressure H of pipe network and water flow Q square are directly proportional.From above-mentioned relation, the output power P of electric submersible pump is directly proportional to the cube of rotation speed n, that is: when controlling with valve, if water supply quantitative change is large, pump working is at E point, and as shown in Figure 2, flow is Q1, lift is H0, when water output is reduced to Q2 from Q1, must close minor valve, at this moment the surface friction drag of valve becomes large, resistance curve moves on to b1 from b3, and heat-capacity curve is constant.Lift rises to H1 from H0, and running operating point moves on to F point from E point, and now the output power of electric submersible pump is proportional to H1 * Q2.When controlling method with rotating speed, if adopt constant voltage (H0), variable speed pump (n2) supplies water, and pipe resistance characteristic curve is b2, and lift characteristic becomes curve n2, and operation point moves on to D point from E point.Now electric submersible pump output power is proportional to H0 * Q2, due to H1>H0, so when by valve controlling flow amount, have the power that is proportional to (H1-H0) * Q2 to be wasted, and along with constantly the turning down of valve, it is large that the surface friction drag of valve constantly become, on pipe resistance characteristic curve, move, running operating point also with on move, so H1 increases, and the power being wasted will increase thereupon.So rotating speed control mode is more much smaller for water-horse power than valve control mode, energy-saving effect is remarkable.
In order to overcome existing oil field water supply well electric submersible pump, do not take conservation measures, the problem that while causing the serious and water of waste of energy to drain, electric submersible pump can not auto-breaking.The invention provides the water supply well energy-saving and frequency-variable supervisory system of using in a kind of oil field, comprise electric submersible pump 5, drive the asynchronous motor 4 of electric submersible pump 5 and the water outlet pipeline being connected with electric submersible pump 5, on above-mentioned well head water outlet pipeline, pressure transmitter 1 is installed, described pressure transmitter 1 records discharge pressure and is translated into 4～20mA electrical signal; Pressure transmitter 1 is electrically connected to the I/O module of PLC2; The I/O module of PLC2 is electrically connected to the control panel of frequency variator 3 and controls frequency variator, and frequency variator 3 connects controls asynchronous motor 4; The well head water outlet pipeline that described electric submersible pump 5 connects is provided with fluid level transmitter, and described fluid level transmitter is electrically connected to the I/O module of PLC2, by liquid level sensor, monitors the water surface, avoids draining and can not automatically disconnecting electricity because of water, causes burning out electric submersible pump; For the water-outlet quantity in Real-Time Monitoring water outlet pipeline, on described well head water outlet pipeline, be provided with the flowmeter being electrically connected to the I/O module of PLC2.
The present invention adopts rotating speed control method to control flow, as shown in Figure 3, the complete closed-loop regulating system that the asynchronous motor 4 of pressure transmitter 1, programmable controller (PLC) 2, frequency variator 3, electric submersible pump 5 and driving electric submersible pump 5 forms together, wherein, electric submersible pump 5 becomes one with asynchronous motor 4.This control system of invariable pressure is by being arranged on pressure transmitter 1 on the pipeline pressure of witness mark in real time, detect the discharge pressure of water pipeline, and by pressure transmitter 1, being converted into the electrical signal of 4-20mA, this testing signal is to realize the key parameter that constant voltage is controlled.Because electrical signal is analog amount, therefore must just can read in and compare with setting value by the A/D modular converter of PLC 2, deviate is relatively carried out to PID computing, by D/A modular converter, convert the digital signal after computing to analogue signal as the input signal of frequency variator 1 operation panel again, control the output frequency of frequency variator 1, thereby control the rotating speed of asynchronous motor 4, and then the water yield of the water outlet pipeline of control electric submersible pump 5 connections, finally make pipeline pressure constant, realize frequency conversion and unvarying pressure control.
The concrete control flow of constant pressure water supply system is as follows: system energising, according to the effectively start signal receiving, first start frequency variator 3, drag electric submersible pump 5 work, the actual pressure of water outlet pipeline recording according to pressure transmitter 1 and the deviate of setting pressure regulate the output frequency of frequency variator 3, control the rotating speed of asynchronous motor 4, when delivery pressure reaches setting value, asynchronous motor 4 stabilizations of speed are to certain certain value, and asynchronous motor 4 is operated under this speed governing operation state.In addition, when frequency variator breaks down, asynchronous motor 4 is electrically connected to soft initiator 6, and variable frequency soft start can make electric submersible pump 5 startings steadily, reduces the impact to electrical network and machinery, has also avoided the water hammer in traditional water supply.
The control flow chart of frequency conversion constant voltage control system can be divided into actuator, input mechanism, control mechanism three parts.(1) input mechanism: in system control procedure, need the signal detecting to comprise discharge pressure signal, water level signal, flux signal and alarm signal.Discharge pressure is the main feedback signal that constant voltage is controlled, and this signal is analogue signal, while being read into the I/O module of PLC, need carry out A/D conversion; Also need in addition upper limits pressure and threshold pression to detect.Whether the water inlet of water level signal reflection electric submersible pump 5 is sufficient.When signal is effective, control system will be controlled System Implementation protection, and to prevent that electric submersible pump 5 skies from taking out and damaging asynchronous motor 4 and electric submersible pump 5, this signal is from fluid level transmitter, this fluid level transmitter is arranged on the well head water outlet pipeline of electric submersible pump 5 connections, and is electrically connected to the I/O module of PLC; Normally whether alarm signal reflection system operation, and whether the asynchronous motor 4 of electric submersible pump transships, whether frequency variator 3 has extremely, and this signal is switching value signal; Flux signal is used for detecting the flow by the water of water outlet pipeline, and this signal is from flowmeter, and this flowmeter is arranged on the water outlet pipeline of well head, and is electrically connected to the I/O module of PLC.
(2) control mechanism: comprise controller (PlC system) 2, frequency variator 3 and three parts of control panel.Controller is the core of whole frequency conversion constant voltage control system, controller directly gathers the pressure in system, water level, alarm signal, to analyzing, implement control algorithm from the data information of man-machine interface and communication interface, draw the control program to actuator, by variable-frequency governor and contactor, actuator's (being electric submersible pump) is controlled; Frequency variator 3 is unit that electric submersible pump 5 is carried out to rotating speed control, and the control signal that its tracking control unit is sent here changes the operation frequency of electric submersible pump, completes the rotating speed of electric submersible pump 5 is controlled.
(3) actuator: actuator is comprised of electric submersible pump 5, is controlled the rotating speed of asynchronous motor 4, to maintain the constant pressure of water outlet pipeline according to the variation of pressure by variable-frequency governor.
This energy-saving and frequency-variable supervisory system that the present embodiment provides, energy dynamic monitoring water supply well water level, discharge pressure and flow and electric submersible pump electrical quantity, water level starts to draw water to high electric submersible pump in limited time automatically, water level during to low water level electric submersible pump automatically stop pumping, water can not burn out electric submersible pump 5 by dry tap, extend the water supply well well workover cycle, reduced well puller's labor intensity.Can within automatic 24 hours, maintain constant pressure, and adjust pressure according to pressure signal automatic stepless, electric submersible pump 5 power factors can be brought up to more than 0.95, electric submersible pump 5 power supply quality have been improved, the power and the actual load that have guaranteed electric submersible pump 5 match, and reach the object of energy saving of system operation, and integrated power-saving rate reaches more than 20%, reduce the loss of power supply line simultaneously, increased transformer belt loading capability.
Embodiment 2:
Frequency variator 3 of the present invention is ABB frequency variator, ACS510 series, and rated capacity is 55～90KW, as shown in Figure 4, the frequency converting and energy saving device ACS510 Frequency Converter Control figure based on PLC: terminal 5,6 connects M, the I terminal of PLC, receive the analog signals that PLC controls frequency variator output frequency, terminal 7,9 meets the E+ of PLC, E-terminal, send the frequency signal of frequency variator, terminal 13 is connected with terminal 10 via variable frequency starting KM2 button, and 10, No. 13 terminals are actuating signals of frequency variator; Terminal 14,15 and high speed/low speed conversion switch S A2 is connected, the high speed selection function that 10, No. 14 terminals are frequency variators, and the low speed selection function that 10, No. 15 terminals are frequency variators, the high speed of frequency variator, low speed selection function are controlled by SA2.Terminal 16 is connected with terminal 10 via frequency conversion reset switch, and 10, No. 16 terminal is fault reset function, and during fault state, closed reduction switch, can carry out failure reset.Terminal 20 is connected with 002 zero line after connecing frequency conversion stopping light; terminal 21 is connected with 002 zero line after connecing converting operation lamp; terminal 24 is connected with 002 zero line after connecing frequency conversion trouble light; 25,27 terminals connect the signal terminal of PLC trouble light; 25, No. 27 terminals are relay output end, during its output, to PLC, provide a trouble signal; protection frequency variator, quits work it.On the spot under state of a control, 1, No. 3 terminal closures of A.C. contactor, frequency variator starts, and drives electric submersible pump work.Can use SA2 throw over switch, control the frequency of its output simultaneously.During frequency variator work, converting operation tutorial light is bright, and frequency conversion stops tutorial light and goes out.While stopping, LED status is contrary.During frequency converter failure, have failure code and be presented on operation panel, simultaneous faults tutorial light is bright.
Control loop wiring diagram based on controlling on the spot frequency conversion start and stop, long-range power frequency startup, standby operation start and stop as shown in Figure 6, is connected, can be controlled on the spot start and stop for 1, No. 2 of SA1.
(1) frequency variator: press SB2, variable frequency starting, 220V AC relay 1KA obtains electric, drives A.C. contactor KM2, and realizes self-locking.When A.C. contactor KM2 connects main circuit of frequency converter, the normal battle of KM2, frequency variator was started working to actuating signal of frequency converter A CS510, drove electric submersible pump operation.Press SB1, frequency variator quits work.
(2) soft initiator: press the operation of SB4 soft initiator, 220V AC relay 2KA obtains electric, and realizes self-locking.The normal battle of 2KA is closed, and soft initiator obtains moving after actuating signal.When soft initiator has started, K20, the K2 terminal closure of often making war, bypass A.C. contactor KM1 obtains TURP and changes, and start-up course finishes.Press SB3, soft initiator stops, and bypass A.C. contactor disconnects.Variable frequency soft start can make electric submersible pump starting steadily, reduces the impact to electrical network and machinery, has also avoided the water hammer in traditional water supply.
The frequency converting and energy saving device that the present embodiment provides can be realized the soft start of electric submersible pump easily, electric submersible pump slowly accelerates starting by frequency variator from 0-50HZ, reduced the impact that electric submersible pump brings because of high-speed starting suddenly, the impact of starting current to electrical network while having reduced across-the-line starting.
During initial launch, must observe turning to of asynchronous motor, make it to meet the requirements.If switched in opposite, the phase sequence that can change power supply obtains correct turning to.For improving the power factor of frequency variator, while preventing asynchronous motor and frequency variator apart from each other, increase vibration simultaneously, between asynchronous motor and frequency variator, be connected with reactor.When adopting while manually controlling, must adopt the mode of soft start to start the asynchronous motor electric current of moment to reduce, avoid electric current excessive and burn out asynchronous motor.
Embodiment 3:
The main body control equipment of realizing constant voltage control in frequency converting and energy saving device is PLC, native system adopts the S7-200 of SIEMENS series of PLC, RS485 PORT COM and the 1 road Ethernet(Ethernet with standard), the RJ45 network port, its volume is little, execution speed is fast, and antijamming capability is strong, superior performance.PLC is mainly used for realizing the automatic control of frequency converting and energy saving device, complete following functions: automatic control electric the putting into operation of pump of diving; When starting, there is soft start function; The operation of electric submersible pump is had to manual/auto control function, manual only Interim use when emergent or maintenance; System has perfect warning function and can show operation conditions.The rationality of circuit and the reliability of program are directly connected to the ride quality of whole system.
As shown in Figure 5, the I/O module port based on PLC distributes and peripheral wiring diagram, is provided with 7 input ports and 10 output ports on described PLC.7 described input ports comprise 2 digital quantity input ports and 5 analog input ports; A+ on the EM231 input/output module of PLC, A-; B+, B-; C+, C-; D+, tetra-terminals of D-connect respectively multifunction electric meter signal, and corresponding is respectively the voltage of major loop, electric current, power and power factor.E+, E-connects the signal of frequency converter frequency feedback, F+, F-connects the discharge pressure signal that well head water outlet pipeline upward pressure transmitter records, G+, G-connects the water level signal that water supply well fluid level transmitter records.Wherein, 2 digital quantity input ports are D+, D-and E+, E-.5 analog input ports are respectively A+, A-; B+, B-; C+, C-; F+, F; G+, G-.
10 described output ports comprise 9 digital quantity output ports and 1 analog output port.
Wherein 9 digital quantity output ports are L0.0 ~ L0.4, M0.1, M0.2, M0.4, M0.5, and L0.0 ~ L0.4 exports respectively power frequency/converting operation signal of asynchronous motor; The M0.1 output water level control signal that transfinites; M0.2 output frequency converter failure alarm signal; M0.4 output alarm electric bell signal; M0.5 output frequency variator reseting controling signal; 1 analog output port is M, I, and the analogue signal of its output is for controlling the output frequency of frequency variator.
L0.0 obtains when electric, and PLC is in telework state, and KA1 obtains electric, and drives KA2 and KA3 by built-in variable, and KA2 and KA3 are respectively variable frequency starting and power frequency startup.During frequency conversion fault, trouble signal is passed to L0.2, KA2 dead electricity, and frequency variator stops output, and KA4 is standby.L0.1 obtains electric, in PLC CPU in local working state, KA1 dead electricity, by on-the-spot button, to frequency variator, soft initiator is controlled.Terminal M, I meets frequency variator analog input terminal AI2, to control the output frequency of frequency variator.
Wiring diagram based on terminal as shown in Figure 7, the U of terminal TB1, V, W, N meet three-phase four-wire system 380V to QSO, the U2 of terminal TB2, V2, W2 are connected to frequency variator, the U4 of terminal TB3, V4, W4 are connected to standby soft start, the 24V+ of terminal TB4,24V-, L7, N connect from switch power with to sky and open QS7, the F+ of terminal TB5, F-(pressure signal), G+, G-(liquid level signal), 485+, 485-(flux signal) be connected to PLC.
Current feed liquid way is towards energy-efficient, automatically reliable future development, and variable-frequency control technique has obtained the application of wide model with its aobvious energy-saving effect and reliable and stable control mode.Water supply well energy-saving and frequency-variable supervisory system is not take conservation measures for oil field water supply well electric submersible pump, when water is drained electric submersible pump can not auto-breaking work etc. practical problem, the new ideas water supply well energy-saving and frequency-variable supervisory system of developing.The one, energy-saving effect is remarkable, and power factor can be brought up to more than 0.95, and integrated power-saving rate reaches more than 20%, has reduced the loss of power supply line simultaneously, has increased the load capacity of transformer; The 2nd, when opening, shutting down, can reduce impact and the impact of water outlet pipeline internal pressure to pipe network system of Current on Grid; The 3rd, can reduce the mechanical shock loss of electric submersible pump, asynchronous motor self.For oil field water supply well normalization, produce reliable energy-saving monitoring system is provided.
The present embodiment does not have specifically described part all to belong to common practise and the known technology of the art, and if needed, we can provide reference!
More than exemplifying is only to illustrate of the present invention, does not form the restriction to protection scope of the present invention, within the every and same or analogous design of the present invention all belongs to protection scope of the present invention.
Claims (4)
1. the water supply well energy-saving and frequency-variable supervisory system that oil field is used, comprise electric submersible pump (5), the asynchronous motor (4) that drives electric submersible pump (5) and the water outlet pipeline being connected with electric submersible pump (5), it is characterized in that: on above-mentioned well head water outlet pipeline, pressure transmitter (1) is installed, described pressure transmitter (1) records discharge pressure and is translated into 4～20mA electrical signal; Pressure transmitter (1) electrical connection PLC(2) I/O module; PLC(2) I/O module connects frequency variator (3) operation panel and controls frequency variator, and frequency variator (3) connects controls asynchronous motor (4);
The well head water outlet pipeline that described electric submersible pump (5) connects is provided with fluid level transmitter, described fluid level transmitter and PLC(2) I/O module be electrically connected to;
On described well head water outlet pipeline, be provided with and PLC(2) the flowmeter that is electrically connected to of I/O module.
2. the water supply well energy-saving and frequency-variable supervisory system that a kind of oil field as claimed in claim 1 is used, is characterized in that: described PLC(2), be provided with 7 input ports and 10 output ports.
3. the water supply well energy-saving and frequency-variable supervisory system that a kind of oil field as claimed in claim 2 is used, is characterized in that: 7 described input ports comprise 2 digital quantity input ports and 5 analog input ports; 10 described output ports comprise 9 digital quantity output ports and 1 analog output port.
4. the water supply well energy-saving and frequency-variable supervisory system that a kind of oil field as claimed in claim 1 is used, is characterized in that: frequency variator (3) is ABB frequency variator, adopts ACS510 series, and rated capacity is 55～90KW.
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| CN116760330A (en) * | 2023-08-18 | 2023-09-15 | 山东宇飞传动技术有限公司 | Control system for variable frequency control device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105444150A (en) * | 2015-11-10 | 2016-03-30 | 中国石油化工股份有限公司 | Water supply system with multiple water sources |
| CN105444150B (en) * | 2015-11-10 | 2019-12-24 | 中国石油化工股份有限公司 | Multi-water-source water supply system |
| CN116760330A (en) * | 2023-08-18 | 2023-09-15 | 山东宇飞传动技术有限公司 | Control system for variable frequency control device |
| CN116760330B (en) * | 2023-08-18 | 2023-11-07 | 山东宇飞传动技术有限公司 | Control system for variable frequency control device |
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Application publication date: 20141008 |