CN103984300B - Method for frequency conversion and energy saving of oil pumping unit - Google Patents
Method for frequency conversion and energy saving of oil pumping unit Download PDFInfo
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- CN103984300B CN103984300B CN201410173596.5A CN201410173596A CN103984300B CN 103984300 B CN103984300 B CN 103984300B CN 201410173596 A CN201410173596 A CN 201410173596A CN 103984300 B CN103984300 B CN 103984300B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The invention discloses a method for frequency conversion and energy saving of an oil pumping unit. The method comprises the following steps that after a device is started, a system is initialized and the balance degree of the oil pumping unit is adjusted; whether the oil pumping unit is in a power frequency operation mode or in a frequency conversion operation mode is judged; in the frequency conversion operation mode, whether a frequency converter breaks down or not is judged, and if not, a stroke frequency adjustment mode of the oil pumping unit is judged; in an automatic stroke frequency adjusting mode, indicator diagram data are collected and whether the oil pumping unit breaks down or not is judged according to an indicator diagram; if the oil pumping unit does not break down, whether the oil pumping unit needs interval pumping control or not is judged; if the oil pumping unit does not need the interval pumping control, the stroke frequency of the oil pumping unit is automatically adjusted. The method for frequency conversion and energy saving of the oil pumping unit has the advantages that the adjustment of the balance degree, the optimal operation stroke frequency and the optimal interval pumping mode is conducted according to the working conditions of the oil pumping unit, the states of high efficiency and low energy consumption of the oil pumping unit can be kept, and the problems of high energy consumption and low efficiency in the operation process of the oil pumping unit can be solved.
Description
Technical field
The present invention relates to a kind of power-economizing method of oil pumper, especially a kind of oil pumper energy-saving and frequency-variable method.
Background technology
China many oilfield exploitation progress into middle and late stage, down-hole feed flow is gradually not enough, and pump efficiency is gradually lowered, " partly taking out " and
" sky is taken out " phenomenon is serious, and degree of balance regulation is unreasonable in addition, makes machine, well parameter mismatch, causes " low load with strong power " phenomenon.Oil pumping
The operational efficiency of machine is especially low, is 25.96% in China's average efficiency, and external average level is 30.05%.Oil field is ensureing
Also consumes a large amount of electric energy, the electric energy of only oil pumper consumption has just exceeded oil field total power consumption among these while energy resource supply
40%, it is the rough mode of production in typical " with energy consumption transducing source ".With the propulsion of national " energy-saving and emission-reduction " behave, how to drop
The energy consumption of the low beam pumping unit occupying the more than half rivers and mountains in oil field, becomes for current each elephant problem demanding prompt solution.
Content of the invention
The present invention is for avoiding weak point present in above-mentioned prior art, providing a kind of oil pumper energy-saving and frequency-variable side
Method, to solve the problems, such as highly energy-consuming in running for the oil pumper, poor efficiency.
The present invention is to solve technical problem to employ the following technical solutions.
A kind of oil pumper energy-saving and frequency-variable method, is characterized in, comprises the steps (as shown in Figure 4):
Step 1: after unlatching equipment, carry out the initialization of control system for oil-pumping unit, the degree of balance carrying out oil pumper is adjusted；
Step 2: judge that oil pumper is in power frequency mode of operation or variable frequency work pattern；If being in power frequency Working mould
Formula, then keep oil pumper to be in the working condition of power frequency mode of operation；If oil pumper is in variable frequency work pattern, judge to become
Frequency device whether there is fault；
Step 3: if converter has fault, oil pumper is adjusted to power frequency mode of operation, and keeps at oil pumper
Working condition in power frequency mode of operation；If converter does not have fault, enter step 4；
Step 4: judge that oil pumper is in automatic jig frequency shaping modes and is in manual jig frequency shaping modes；If taken out
Oil machine is in manual jig frequency shaping modes, then adjusted by the jig frequency that staff carries out oil pumper manually；If oil pumper is
It is in automatic jig frequency shaping modes, then enter step 5；
Step 5: control system for oil-pumping unit carries out the collection of pumping-unit workdone graphic data, obtains according to collection indicator card data
Indicator card, is then analyzed to the shape facility of the indicator card obtaining, and judges that oil pumper whether there is fault；
Step 6: if oil pumper has fault, troubleshooting is carried out to oil pumper；If there is not fault in oil pumper,
Then judge oil pumper the need of taking out control；Take out control between if necessary, then by control system for oil-pumping unit, oil pumper is carried out
Between take out control；If taking out control between not needing, enter step 7；
Step 7: jig frequency is carried out to oil pumper by control system for oil-pumping unit and automatically adjusts.
As shown in figure 5, in described step 1, the degree of balance of described oil pumper adjusts process and comprises the steps:
Step 101: judge whether degree of balance is locked, if degree of balance is locked, terminate regulation flow process；If balance
Degree is not locked, then enter step 102；
Step 102: calculate the degree of balance of oil pumper, degree of balance=down stroke peak power/upstroke peak power；
Step 103: judge whether the degree of balance of oil pumper is less than 80%；If the degree of balance of oil pumper is less than 80%, will
Small machine for balancing drives leading screw to adjust a step-length to big, to increase the value of degree of balance；If the balance of oil pumper
Degree is not less than 80%, then enter step 104；
Step 104: judge whether the degree of balance of oil pumper is more than 110%；If the degree of balance of oil pumper is more than 110%,
The small machine being used for balancing is driven leading screw to one step-length of little adjustment, to reduce the value of degree of balance；
Step 105: determine whether to terminate the adjustment flow process of degree of balance；If it is not, then return to step 1；If it is,
Terminate regulation flow process.
As shown in fig. 6, in described step 6, described between take out the process of control and comprise the steps:
Step 601: control system for oil-pumping unit puts into production when running first, setup parameter first: face is completely taken out in artificial setting
Long-pending, stop taking out area st, stop taking out duration tsWith oil pumping duration cs；
Step 602: after oil pumper is started working, collection pumping-unit workdone graphic data is simultaneously analyzed to data；
Step 603: after oil pumper starts pumping operation, by first indicator card area average in 10 minutesWith
Area is completely taken out in artificial settingCompare；If≥* 90%, then take out the cycle of stopping and will pump duration c nextsIncrease, will stop to take out duration tsReduce, return to step 1 undated parameter oil pumping duration c simultaneouslysWith stop taking out duration ts；If
＜* 90%, then enter step 604；
Step 604: if≤* 70%, then take out the cycle of stopping and will pump duration c nextsReduce, when will stop to take out
Long tsIncrease, return to step 1 undated parameter oil pumping duration c simultaneouslysWith stop taking out duration ts；If＞* 70%, then
Keep parameter oil pumping duration csWith stop taking out duration tsConstant.
In described step 602, after gathering pumping-unit workdone graphic data and data being analyzed, also include judging manually
Set and completely take out area, stop taking out area stStep the need of updating；Update artificial setting if necessary and completely take out area、
Stop taking out area st, then area is completely taken out to artificial setting, stop taking out area stIt is updated rear return to step 1, manually set
Completely take out area, stop taking out area stReset；If not needing to update, the artificial setting of parameter is kept completely to take out area、
Stop taking out area stConstant.
In described step 7, the method that described jig frequency automatically adjusts is: is determined according to indicator card and drives oil pumper mair motor
The optimum frequency value of converter, drives mair motor to realize jig frequency and adjusts；
(1)
In above formula (1),Control the value of calculation of frequency for i ＆ lt, the area of indicator card when si controls frequency for i ＆ lt,
Si-1 is the area of indicator card during the i-th -1 secondary control frequency；Upper limiting frequencyIt is the highest frequency of converter permission work, under
Limit frequencyIt is the low-limit frequency of converter permission work, sets upper limiting frequency and lower frequency limit, can automatically ensure output frequency
Rate is not higher than upper limiting frequency, is not less than lower frequency limit.
Compared with the prior art, the present invention has the beneficial effect that:
The efficient oil pumper energy-saving and frequency-variable method of the present invention, has a following feature:
(1) possess oilwell parameter, the Real-time Collection of electrical quantity and transfer function；
(2) possess reception host computer instruction, realize the long-range start and stop of oil pumper, voice message and warning function；
(3) possesses display function.There is degree of balance show and current jig frequency display function；
(4) possess automatic judgement and the adjustment function of balance of well pumping unit degree.Automatically monitor and show in real time the flat of oil pumper
Oil pumper manually or automatically can be adjusted to optimal equilibrium condition, reduce peak point current by weighing apparatus situation, reach protection decelerator and
The purpose of energy-conservation；
(5) possess automatic judgement and the adjustment function of oil pumper best effort jig frequency.Show the jig frequency of oil pumper in real time.Both
Can manual step-less adjustment jig frequency it is also possible to according to oilwell produced fluid amount size, automatically determine optimum jig frequency, ensureing Liquid output
In the case of, jig frequency is adjusted to minimum, reaches optimum energy-saving effect；
(6) take out function between the intelligence possessing oil pumper.Take out well for, system can be taken out between manually setting, also can basis
Oilwell produced fluid amount variation tendency, takes out system between automatically formulating most preferably, realizes " having oil just to take out, oil-free is just stopped " function, is ensureing to produce
On the premise of liquid measure, take out effective energy-conservation of well between realization；
(7) possesses power frequency/frequency conversion automatic switching function.When converter breaks down, power frequency pattern can be automatically switched to
Run；
(8) possess soft start and overload protection function.Startup inertial load can effectively be reduced, and sentence with reference to optimum balance degree
Determine and regulation technology, make the installed power of oil pumper fall over a large area one grade, well site net capacity is greatly reduced.
The efficient oil pumper energy-saving and frequency-variable method of the present invention, having can be according to the operating mode degree of being balanced of oil pumper,
Good work jig frequency, optimal between take out the adjustment of mode, so that oil pumper is kept the state of high-efficiency low energy consumption, solve oil pumper and exist
The advantages of highly energy-consuming in running, inefficient problem.
Brief description
Fig. 1 is the schematic diagram of the well site control program of efficient oil pumper energy-saving and frequency-variable method in the present invention.
Fig. 2 is the schematic diagram of the well head control program of efficient oil pumper energy-saving and frequency-variable method in the present invention.
Fig. 3 is the rtu hardware composition figure of the oil pumper of efficient oil pumper energy-saving and frequency-variable method in the present invention.
Fig. 4 is the oil pumper control flow chart of efficient oil pumper energy-saving and frequency-variable method in the present invention.
Fig. 5 is that the degree of balance of efficient oil pumper energy-saving and frequency-variable method in the present invention automatically adjusts flow chart.
Fig. 6 is to take out control flow chart between efficient oil pumper energy-saving and frequency-variable method in the present invention.
Below by way of specific embodiment, and the invention will be further described to combine accompanying drawing.
Specific embodiment
Referring to Fig. 1～Fig. 6, a kind of oil pumper energy-saving and frequency-variable method, as shown in figure 4, comprise the steps:
Step 1: after unlatching equipment, carry out the initialization of control system for oil-pumping unit, the degree of balance carrying out oil pumper is adjusted；
Step 2: judge that oil pumper is in power frequency mode of operation or variable frequency work pattern；If being in power frequency Working mould
Formula, then keep oil pumper to be in the working condition of power frequency mode of operation；If oil pumper is in variable frequency work pattern, judge to become
Frequency device whether there is fault；
Step 3: if converter has fault, oil pumper is adjusted to power frequency mode of operation, and keeps at oil pumper
Working condition in power frequency mode of operation；If converter does not have fault, enter step 4；
Step 4: judge that oil pumper is in automatic jig frequency shaping modes and is in manual jig frequency shaping modes；If taken out
Oil machine is in manual jig frequency shaping modes, then adjusted by the jig frequency that staff carries out oil pumper manually；If oil pumper is
It is in automatic jig frequency shaping modes, then enter step 5；
Step 5: control system for oil-pumping unit carries out the collection of pumping-unit workdone graphic data, obtains according to collection indicator card data
Indicator card, is then analyzed to the shape facility of the indicator card obtaining, and judges that oil pumper whether there is fault；
Step 6: if oil pumper has fault, troubleshooting is carried out to oil pumper；If there is not fault in oil pumper,
Then judge oil pumper the need of taking out control；Take out control between if necessary, then by control system for oil-pumping unit, oil pumper is carried out
Between take out control；If taking out control between not needing, enter step 7；
Step 7: jig frequency is carried out to oil pumper by control system for oil-pumping unit and automatically adjusts.
As shown in figure 5, in described step 1, the degree of balance of described oil pumper adjusts process and comprises the steps:
Step 101: judge whether degree of balance is locked, if degree of balance is locked, terminate regulation flow process；If balance
Degree is not locked, then enter step 102；
Step 102: calculate the degree of balance of oil pumper, degree of balance=down stroke peak power/upstroke peak power；
Step 103: judge whether the degree of balance of oil pumper is less than 80%；If the degree of balance of oil pumper is less than 80%, will
Small machine for balancing drives leading screw to adjust a step-length to big, to increase the value of degree of balance；If the balance of oil pumper
Degree is not less than 80%, then enter step 104；
Step 104: judge whether the degree of balance of oil pumper is more than 110%；If the degree of balance of oil pumper is more than 110%,
The small machine being used for balancing is driven leading screw to one step-length of little adjustment, to reduce the value of degree of balance；
Step 105: determine whether to terminate the adjustment flow process of degree of balance；If it is not, then return to step 1；If it is,
Terminate regulation flow process.
As shown in fig. 6, in described step 6, described between take out the process of control and comprise the steps:
Step 601: control system for oil-pumping unit puts into production when running first, setup parameter first: face is completely taken out in artificial setting
Long-pending, stop taking out area st, stop taking out duration tsWith oil pumping duration cs；
Step 602: after oil pumper is started working, collection pumping-unit workdone graphic data is simultaneously analyzed to data；
Step 603: after oil pumper starts pumping operation, by first indicator card area average in 10 minutesWith
Area is completely taken out in artificial settingCompare；If≥* 90%, then take out the cycle of stopping and will pump duration c nextsIncrease, will stop to take out duration tsReduce, return to step 1 undated parameter oil pumping duration c simultaneouslysWith stop taking out duration ts；If
＜* 90%, then enter step 604；
Step 604: if≤* 70%, then take out the cycle of stopping and will pump duration c nextsReduce, when will stop to take out
Long tsIncrease, return to step 1 undated parameter oil pumping duration c simultaneouslysWith stop taking out duration ts；If＞* 70%, then
Keep parameter oil pumping duration csWith stop taking out duration tsConstant.
In described step 602, after gathering pumping-unit workdone graphic data and data being analyzed, also include judging manually
Set and completely take out area, stop taking out area stStep the need of updating；Update artificial setting if necessary and completely take out area、
Stop taking out area st, then area is completely taken out to artificial setting, stop taking out area stIt is updated rear return to step 1, manually set
Completely take out area, stop taking out area stReset；If not needing to update, the artificial setting of parameter is kept completely to take out area、
Stop taking out area stConstant.
In described step 7, the method that described jig frequency automatically adjusts is: is determined according to indicator card and drives oil pumper mair motor
The optimum frequency value of converter, drives mair motor to realize jig frequency and adjusts；
(1)
In above formula (1),Control the value of calculation of frequency for i ＆ lt, the area of indicator card when si controls frequency for i ＆ lt,
Si-1 is the area of indicator card during the i-th -1 secondary control frequency；Upper limiting frequencyIt is the highest frequency of converter permission work, under
Limit frequencyIt is the low-limit frequency of converter permission work, sets upper limiting frequency and lower frequency limit, can automatically ensure output frequency
Rate is not higher than upper limiting frequency, is not less than lower frequency limit.
The present invention relies on energy-saving controller, there is provided a kind of efficient oil pumper energy-saving and frequency-variable method.Energy-saving controller energy
Enough the real-time parameters such as machine, well are carried out aggregation process and control oil production equipment, realize machine, well parameter coupling, reach optimum control.
In actual applications, energy-saving controller often coordinates long distance control system, constitutes oil pumper intelligent energy-saving control system, and has
There is remote control, remote signalling, remote regulating, remote measurement etc. " four is distant " function (see figure 1).
Well head is designed as master-slave mode (see figure 2) by the present invention, installs intelligent oil pumping machine frequency-conversion control cabinet one in each well head
Platform, mainly completes the collection of oil pumper individual well parameter and the Based Intelligent Control of oil pumper, then data is uploaded to rtu, rtu passes through
Each individual well data is uploaded to monitor supervision platform by wireless bridge, and in addition to parameter acquisition, well site is additionally provided with video monitoring, possesses intelligence and regards
Frequency monitoring alarm function and mobile target swarm into auto-alarm function.Monitor supervision platform is mainly in combination with control result and work(figure intelligence
Diagnosis of Work Conditions and work(figure oil measuring system can realize remote monitoring and the remote management of oil well operation.
As Fig. 1, in the control system in well site, including production monitoring platform, video monitoring platform, office computer, switch,
The equipment such as wireless bridge, well site intelligent video monitoring apparatus, well site host rtu, intelligent oil pumping machine frequency-conversion control cabinet and oil pumper.Take out
The mair motor of oil machine drags quadric chain oil pumper and does cycle mechanical movement, and crude oil is pumped into ground.Meanwhile, all kinds of
Oil extractor operating parameter is reached rtu by sensor, is completed collection and the process of indicator card data by rtu, and calculates oil pumper
Degree of balance, optimum jig frequency and take out control strategy, complete the dynamic regulation of working conditions of oil extractor finally by driving equipment.Oil pumping
The parameter on machine and backstage is exchanged and is realized by gprs.
Oil pumper individual well operation schematic diagram with intelligent oil pumping machine frequency-conversion control cabinet as control core is as shown in Figure 2.Intelligence
Rtu and converter is set in oil pumper frequency-conversion control cabinet.Rtu passes through wellhead temperature sensor and pressure transducer obtains the ginseng of well head
Number, obtains the parameter of oil pumper mair motor by encoder.Converter passes through modbus agreement and receives mair motor good speed from rtu
Line frequency value simultaneously updates respective block in depositor, then drives oil pumper mair motor to run with this frequency values.Oil pumping owner
Motor drag four-bar linkage structure does cycle mechanical movement, drives oil well pump to complete the pumping cycle, crude oil is pumped into ground.Taking out
In oil machine running, angular displacement sensor, load transducer, wellhead temperature, flow, pressure transducer, three phase electrical parameters are adopted
Integrate module etc. the physical signalling perceiving is nursed one's health and pass rtu back as the signal of telecommunication.By to suspension point displacement signal and load in rtu
The analysis of signal completes collection and the process of indicator card data, by Energy Saving Control algorithm calculate oil pumper optimum jig frequency or
Between take out control strategy, then pass through transducer drive oil pumper mair motor；By complete to the analysis of oil pumper mair motor electrical quantity
Become the calculating of balance of well pumping unit degree, then complete the regulation of balance of well pumping unit degree by controlling balancing small machine.Oil pumper is transported
Line parameter, indicator card parameter, the transmitted in both directions of remote control parameter are by the gprs radio communication being installed in Intelligent control cabinet
Module is realized.
Rtu as the RTU of oil pumper hardware connection figure as shown in Figure 3, on the one hand, responsible oil pumper three
Phase electrical quantity, mair motor and balancing small machine electric current, indicator card data and other sensor parameters gather and realize with upper
The telecommunication of position machine.On the other hand, the floor data that Real-time Collection arrives is passed through main control chip dspic33fj256mc710's
In piece, dsp engine completes processing and carrying out state modulator by mcu unit in piece to external equipments such as converters, finally of algorithm
The jig frequency realizing oil pumper automatically adjusts, take out control between intelligence and degree of balance automatically adjusts.
The hardware device of digitized oil pump energy-saving control system mainly includes the intelligent remote observing and controlling with host
Terminal (rtu), the load transducer for indicator card data acquisition and angular displacement sensor, for collection oil pumping electromechanical parameters
Three phase electrical parameters acquisition module, for limiting the limit switch of oil pumper stroke, for the language of start and stop prompting and fault alarm
Sound module, for the Switching Power Supply powered to measuring and controlling equipment, the charactron showing for jig frequency and degree of balance and inlet wire fuse
The attached units such as device, Surge Protector, heater, A.C. contactor, chopper, selecting switch, button and line binding post
Device.
System controls oil pumper by the way of master controller is combined with converter, can automatically switch when frequency converter failure
To power frequency pattern, there is clear in structure, reliability is high, powerful, application is flexible, the advantages of easy to operate.Master controller energy
Enough the indicator card data collecting is carried out by intellectual analysis and controls oil extractor operating parameter, so that oil pumper is kept with oilwell parameter
Dynamic Matching, is in optimal operational condition all the time, and can coordinate ipc monitor configuration software and oil gas Process research
Work(figure intelligence Diagnosis of Work Conditions and work(figure oil measuring system realize fuel gauging, fault diagnosis and Based Intelligent Control etc..
System start-up after initializing, degree of balance is adjusted and is carried out parallel with jig frequency regulation.Degree of balance adjusts and is divided into manual tune
Save and automatically adjust both of which.Whether jig frequency adjusts and also automatically adjusts and adjust both of which manually, joined according to converter
Adjust with jig frequency, jig frequency automatically adjust and have power frequency pattern and variable mode point, under variable mode, if converter occur therefore
Barrier, then automatically switch to and run under power frequency pattern.In system operation, Real-time Collection pumping-unit workdone graphic data, shown by analysis
Work(diagram shape feature is identifying oil pumping machine fault (omiting).Jig frequency automatically adjusts under pattern, if pump efficiency is too low, takes out between needs, then
By analyze indicator card area to formulate between take out control strategy；If taken out between not needing, control is determined according to indicator card area
The optimal output frequency of the converter of oil pumper mair motor processed, automatically adjusts beam-pumping unit jig frequency.
The efficient oil pumper energy-saving and frequency-variable method of the present invention has the characteristics that the following aspects.
(1) automatic adjusting balance.Balance of well pumping unit degree is the ratio of down stroke peak power and upstroke peak power, degree of balance
Think when between 80%～110% that balance of well pumping unit degree is qualified, otherwise judge balance of well pumping unit degree as unqualified；
The degree of balance of oil pumper if degree of balance is not locked, is judged according to power method.If degree of balance is less than
80%, when that is, degree of balance is too low, drive leading screw to increase balance angle value to one step-length of big adjustment by balancing small machine.With
Sample, if degree of balance is more than 110%, when that is, degree of balance is too high, reversely adjusts a step-length to reduce degree of balance, does flat afterwards again
The calculating of weighing apparatus degree, until the degree of balance of oil pumper reaches optimum state (see figure 4).
(2) automatically adjust jig frequency.The optimum frequency value driving oil pumper mair motor converter is determined according to indicator card, drives master
Motor is realized jig frequency and is adjusted.
In formula,ForiThe value of calculation of secondary control frequency, upper limiting frequencyIt is the highest frequency of converter permission work,
Lower frequency limitIt is the low-limit frequency of converter permission work, sets upper limiting frequency and lower frequency limit, can automatically ensure to export
Frequency is not higher than upper limiting frequency, is not less than lower frequency limit；
(3) Intelligent intermittent controls.With the continuity of pumping time, down-hole liquid supply speed is unable to catch up with the pumping speed of oil pumper
Degree, hydrodynamic face is gradually reduced, and pump efficiency is gradually lowered, and indicator card becomes shrivelled, and area reduces, oil well liquid-supplying wretched insufficiency,
Start to produce " sky is taken out " phenomenon.Control is taken out it may be assumed that having oil just to take out, oil-free is just shut down between intelligence.
Control system puts into production when running first, according to oil field actual production data, sets manually and completely takes out area
, stop taking out area, stop taking out durationWith oil pumping durationFour parameters, such as set completely take out area as, stop the face of taking out
Amass and be, a length of 2 hours when stopping taking out, a length of 1 hour during oil pumping.Rise after taking out, by first indicator card in 10 minutes
Area averageWith completely take out Area comparison, if more than or equal to completely taking out the 90% of area, take out the cycle of stopping and will pump next
Duration increases, will stop to take out duration reduction；If less than or equal to completely taking out the 70% of area, take out the cycle of stopping and will pump next
Duration reduces, will stop to take out duration increase；If being less than more than 70% and completely taking out the 90% of area, maintain raw parameter constant.This
Afterwards, every calculating carrying out an indicator card average area for 10 minutes, as measured indicator diagram area s, whenWhen, then stop to take out, after stopping taking out duration and terminating, turned back on and taken out.
During calculating indicator card area at every 10 minutes, if there is changes more than continuous 2 hours of difference of area
When changing all within 10%, that is, think have found new stop taking out area, updated the data with this.If the 10 of start initial stage every time
When more than continuous two hours of meansigma methodss of minute indicator card area being all higher than or be equal to completely take out area 110%, that is, think and find
Area is taken out in new expire, and is updated the data with this.So far, data、、WithObtain dynamic renewal (see figure 5).
(4) fault diagnosis based on dynamometer card analysis.Contain abundant work information in the indicator card of oil pumper, passed through
Analysis indicator card may determine that oil pumper working condition and underground working, and during specific works, the system can be judged according to indicator card
18 kinds of typical conditions.
Claims (4)
1. a kind of oil pumper energy-saving and frequency-variable method, is characterized in that, comprise the steps:
Step 1: after unlatching equipment, carry out the initialization of control system for oil-pumping unit, the degree of balance carrying out oil pumper is adjusted；
Step 2: judge that oil pumper is in power frequency mode of operation or variable frequency work pattern；If being in power frequency mode of operation,
Oil pumper is kept to be in the working condition of power frequency mode of operation；If oil pumper is in variable frequency work pattern, judge converter
With the presence or absence of fault；
Step 3: if converter has fault, oil pumper is adjusted to power frequency mode of operation, and keeps oil pumper to be in work
The working condition of frequency mode of operation；If converter does not have fault, enter step 4；
Step 4: judge that oil pumper is in automatic jig frequency shaping modes and is in manual jig frequency shaping modes；If oil pumper
It is in manual jig frequency shaping modes, then adjusted by the jig frequency that staff carries out oil pumper manually；If oil pumper is in
Automatically jig frequency shaping modes, then enter step 5；
Step 5: control system for oil-pumping unit carries out the collection of pumping-unit workdone graphic data, obtains according to collection indicator card data and shows work(
Figure, is then analyzed to the shape facility of the indicator card obtaining, and judges that oil pumper whether there is fault；
Step 6: if oil pumper has fault, troubleshooting is carried out to oil pumper；If oil pumper does not have fault, sentence
Disconnected oil pumper is the need of taking out control；Take out control between if necessary, then by control system for oil-pumping unit, oil pumper is entered and in the ranks take out
Control；If taking out control between not needing, enter step 7；
Step 7: jig frequency is carried out to oil pumper by control system for oil-pumping unit and automatically adjusts；
In described step 7, the method that described jig frequency automatically adjusts is: is determined according to indicator card and drives oil pumper mair motor frequency conversion
The optimum frequency value of device, drives mair motor to realize jig frequency and adjusts；
(1)
In above formula (1),Control the value of calculation of frequency for i ＆ lt, the area of indicator card, si-1 when si controls frequency for i ＆ lt
Area for indicator card during the i-th -1 secondary control frequency；Upper limiting frequencyIt is the highest frequency of converter permission work, lower limit frequency
RateIt is the low-limit frequency of converter permission work, set upper limiting frequency and lower frequency limit, can automatically ensure output frequency not
Higher than upper limiting frequency, it is not less than lower frequency limit.
2. a kind of oil pumper energy-saving and frequency-variable method according to claim 1, is characterized in that, in described step 1, described takes out
The degree of balance of oil machine adjusts process and comprises the steps:
Step 101: judge whether degree of balance is locked, if degree of balance is locked, terminate regulation flow process；If degree of balance does not have
Have locked, then enter step 102；
Step 102: calculate the degree of balance of oil pumper, degree of balance=down stroke peak power/upstroke peak power；
Step 103: judge whether the degree of balance of oil pumper is less than 80%；If the degree of balance of oil pumper is less than 80%, will be used for
The small machine of balancing drives leading screw to adjust a step-length to big, to increase the value of degree of balance；If the degree of balance of oil pumper is not
Less than 80%, then enter step 104；
Step 104: judge whether the degree of balance of oil pumper is more than 110%；If the degree of balance of oil pumper is more than 110%, will use
Small machine in balancing drives leading screw to one step-length of little adjustment, to reduce the value of degree of balance；
Step 105: determine whether to terminate the adjustment flow process of degree of balance；If it is not, then return to step 1；If it is, terminating
Regulation flow process.
3. a kind of oil pumper energy-saving and frequency-variable method according to claim 1, is characterized in that, in described step 6, described between
The process taking out control comprises the steps:
Step 601: control system for oil-pumping unit puts into production when running first, setup parameter first: area is completely taken out in artificial setting、
Stop taking out area st, stop taking out duration tsWith oil pumping duration cs；
Step 602: after oil pumper is started working, collection pumping-unit workdone graphic data is simultaneously analyzed to data；
Step 603: after oil pumper starts pumping operation, by first indicator card area average in 10 minutesWith artificial
Set and completely take out areaCompare；If≥* 90%, then take out the cycle of stopping and will pump duration c nextsIncrease, will
Stop taking out duration tsReduce, return to step 1 undated parameter oil pumping duration c simultaneouslysWith stop taking out duration ts；If＜*
90%, then enter step 604；
Step 604: if≤* 70%, then take out the cycle of stopping and will pump duration c nextsReduce, will stop to take out duration ts
Increase, return to step 1 undated parameter oil pumping duration c simultaneouslysWith stop taking out duration ts；If＞* 70%, then keep
Parameter oil pumping duration csWith stop taking out duration tsConstant.
4. a kind of oil pumper energy-saving and frequency-variable method according to claim 3, is characterized in that, in described step 602, collection
Pumping-unit workdone graphic data after data is analyzed, also includes judging manually to set completely taking out area, stop taking out area stIt is
The no step needing to update；Update artificial setting if necessary and completely take out area, stop taking out area st, then face is completely taken out to artificial setting
Long-pending, stop taking out area stIt is updated rear return to step 1, manually set and completely take out area, stop taking out area stAgain set
Fixed；If not needing to update, the artificial setting of parameter is kept completely to take out area, stop taking out area stConstant.
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| CN109388094A (en) * | 2017-08-04 | 2019-02-26 | 台达电子工业股份有限公司 | The control system of pumping unit |
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