CN103984300A - Efficient method for frequency conversion and energy saving of oil pumping unit - Google Patents
Efficient method for frequency conversion and energy saving of oil pumping unit Download PDFInfo
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- CN103984300A CN103984300A CN201410173596.5A CN201410173596A CN103984300A CN 103984300 A CN103984300 A CN 103984300A CN 201410173596 A CN201410173596 A CN 201410173596A CN 103984300 A CN103984300 A CN 103984300A
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- pumping
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses an efficient method for frequency conversion and energy saving of an oil pumping unit. The efficient 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 efficiently.
Background technology
The many oilfield exploitations of China progress into the middle and later periods, and down-hole feed flow is not enough gradually, and pump efficiency reduces gradually, and " partly taking out " and " sky is taken out " phenomenon is serious, and quality of balance adjusting is unreasonable in addition, makes machine, well parameter mismatch, causes " low load with strong power " phenomenon.The operational efficiency of oil pumper is low especially, be 25.96%, and external average level is 30.05% in China's av eff.Oil field is ensureing in energy resource supply also to have consumed a large amount of electric energy, this wherein only the electric energy of oil pumper consumption just exceeded 40% of oil field total power consumption, be the rough mode of production in typical " with energy consumption transducing source ".Along with the propelling of country's " energy-saving and emission-reduction " behave, how to reduce the energy consumption of the walking-beam pumping unit that occupies more than half rivers and mountains, oil field, just become current each elephant problem demanding prompt solution.
Summary of the invention
The present invention is the weak point existing in above-mentioned prior art for avoiding, and a kind of oil pumper energy-saving and frequency-variable method is efficiently provided, to solve the highly energy-consuming of oil pumper in operational process, inefficient problem.
The present invention be technical solution problem by the following technical solutions.
A kind of oil pumper energy-saving and frequency-variable method efficiently, is characterized in, comprises the steps (as shown in Figure 4):
Step 1: after opening device, carry out the initialization of control system for oil-pumping unit, the quality of balance of carrying out oil pumper regulates;
Step 2: judge that oil pumper is in power frequency mode of operation or variable frequency work pattern; If in power frequency mode of operation, keep the duty of oil pumper in power frequency mode of operation; If oil pumper in variable frequency work pattern, judges whether frequency converter exists fault;
Step 3: if frequency converter exists fault, oil pumper is adjusted to power frequency mode of operation, and kept the duty of oil pumper in power frequency mode of operation; If frequency converter does not have fault, enter step 4;
Step 4: judge that oil pumper is to regulate pattern or regulate pattern in manual jig frequency in automatic jig frequency; If oil pumper is to regulate pattern in manual jig frequency, the jig frequency of manually carrying out oil pumper by staff regulates; If oil pumper is to regulate pattern in automatic jig frequency, enter step 5;
Step 5: control system for oil-pumping unit carries out the collection of pumping-unit workdone graphic data, according to gathering load-position diagram data acquisition load-position diagram, then analyzes the shape facility of the load-position diagram obtaining, and judges whether oil pumper exists fault;
Step 6: if oil pumper exists fault, oil pumper is carried out to fault handling; If oil pumper does not exist fault, judge oil pumper is taken out control between whether needing; If take out control between needing, take out control between by control system for oil-pumping unit, oil pumper being carried out; If take out control between not needing, enter step 7;
Step 7: by control system for oil-pumping unit, oil pumper is carried out to jig frequency and automatically regulate.
As shown in Figure 5, in described step 1, the quality of balance adjustment process of described oil pumper comprises the steps:
Step 101: judge that whether quality of balance is locked, if quality of balance is locked, finish to regulate flow process; If quality of balance does not have locked, enter step 102;
Step 102: calculate the quality of balance of oil pumper, quality of balance=down stroke peak power/upstroke peak power;
Step 103: whether the quality of balance that judges oil pumper is less than 80%; If the quality of balance of oil pumper is less than 80%, drive leading screw to step-length of large adjustment the small machine for balancing, increase the value of quality of balance; If the quality of balance of oil pumper is not less than 80%, enter step 104;
Step 104: whether the quality of balance that judges oil pumper is greater than 110%; If the quality of balance of oil pumper is greater than 110%, drive leading screw to step-length of little adjustment the small machine for balancing, reduce the value of quality of balance;
Step 105: the adjustment flow process that judges whether to finish quality of balance; If not, return to step 1; If so, finish to regulate flow process.
As shown in Figure 6, in described step 6, the process of taking out control between described comprises the steps:
Step 601: when control system for oil-pumping unit puts into production operation first, first setup parameter: area is completely taken out in artificial setting
, stop pumping area S
t, stop pumping duration T
swith oil pumping duration C
s;
Step 602: after oil pumper is started working, gather pumping-unit workdone graphic data to data analysis;
Step 603: oil pumper starts after oil pumping work, by the load-position diagram area average in first 10 minutes
completely take out area with artificial setting
compare; If
>=
* 90%, at the next cycle of the stopping duration C that will pump that takes out
sincrease
, by stop pumping duration T
sreduce
, return to step 1 undated parameter oil pumping duration C simultaneously
swith stop pumping duration T
s; If
<
* 90%, enter step 604;
Step 604: if
≤
* 70%, at the next cycle of the stopping duration C that will pump that takes out
sreduce
, by stop pumping duration T
sincrease
, return to step 1 undated parameter oil pumping duration C simultaneously
swith stop pumping duration T
s; If
>
* 70%, keep parameter oil pumping duration C
swith stop pumping duration T
sconstant.
In described step 602, gather pumping-unit workdone graphic data to after data analysis, also comprise and judge that artificial setting completely takes out area
, stop pumping area S
twhether need the step of upgrading; Completely take out area if need to upgrade artificial setting
, stop pumping area S
t, artificial setting is completely taken out to area
, stop pumping area S
tafter upgrading, return to step 1, carry out artificial setting and completely take out area
, stop pumping area S
treset; If do not need to upgrade, keep the artificial setting of parameter completely to take out area
, stop pumping area S
tconstant.
In described step 7, the method that described jig frequency regulates is automatically: determine the optimum frequency value that drives oil pumping owner motor inverter according to load-position diagram, drive main motor to realize jig frequency and regulate;
（1）
In above formula (1),
be the calculated value of the i time controlled frequency, the area of load-position diagram when Si is the i time controlled frequency, the area of load-position diagram when Si-1 is the i-1 time controlled frequency; Upper limiting frequency
the highest frequency of frequency converter permission work, lower frequency limit
be the low-limit frequency of frequency converter permission work, capping frequency and lower frequency limit, can ensure that output frequency, not higher than upper limiting frequency, is not less than lower frequency limit automatically.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Efficient oil pumper energy-saving and frequency-variable method of the present invention, has following feature:
(1) possess Real-time Collection and the transfer function of oilwell parameter, electrical quantity;
(2) possess the instruction of the host computer of reception, realize the long-range start and stop of oil pumper, voice message and warning function;
(3) possesses Presentation Function.Having quality of balance shows and current jig frequency Presentation Function;
(4) possess the automatic judgement of balance of well pumping unit degree and adjust function.Automatically monitoring the in real time equilibrium condition of demonstration oil pumper, can adjust to oil pumper best equilibrium condition manually or automatically, reduces peak point current, reaches protection speed reduction unit and energy-conservation object;
(5) possess the automatic judgement of oil pumper best effort jig frequency and adjust function.Show in real time the jig frequency of oil pumper.Both manual step-less adjustment jig frequency, also can, according to oilwell produced fluid amount size, determine optimum jig frequency automatically, in the situation that ensureing production fluid amount, jig frequency is adjusted to minimum, reaches optimum energy-saving effect;
(6) possess between the intelligence of oil pumper and take out function.For taking out well, between can manually setting, take out system, also can be according to oilwell produced fluid amount variation tendency, automatically formulate between the best and take out system, realize " have oil just to take out, just stop without oil " function, ensureing, under the prerequisite of production fluid amount, between realization, to take out the effectively energy-conservation of well;
(7) possesses power frequency/frequency conversion automatic switching function.In the time that frequency converter breaks down, can automatically switch to power frequency mode operation;
(8) possess soft start and overload protection function.Can effectively reduce startup inertial load, and judge and regulation technology in conjunction with optimum balance degree, make the installed power of oil pumper fall over a large area one grade, significantly reduce well site net capacity.
Efficient oil pumper energy-saving and frequency-variable method of the present invention, have can according to the operating mode of oil pumper carry out taking out between quality of balance, best effort jig frequency, the best mode adjustment, make oil pumper can keep high-efficiency low energy consumption state, solve the advantages such as the highly energy-consuming of oil pumper in operational process, inefficient problem.
Brief description of the drawings
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 diagram 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 quality of balance of efficient oil pumper energy-saving and frequency-variable method in the present invention regulates process flow diagram automatically.
Fig. 6 be in the present invention efficiently oil pumper energy-saving and frequency-variable method between take out control flow chart.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to Fig. 1～Fig. 6, a kind of oil pumper energy-saving and frequency-variable method efficiently, as shown in Figure 4, comprises the steps:
Step 1: after opening device, carry out the initialization of control system for oil-pumping unit, the quality of balance of carrying out oil pumper regulates;
Step 2: judge that oil pumper is in power frequency mode of operation or variable frequency work pattern; If in power frequency mode of operation, keep the duty of oil pumper in power frequency mode of operation; If oil pumper in variable frequency work pattern, judges whether frequency converter exists fault;
Step 3: if frequency converter exists fault, oil pumper is adjusted to power frequency mode of operation, and kept the duty of oil pumper in power frequency mode of operation; If frequency converter does not have fault, enter step 4;
Step 4: judge that oil pumper is to regulate pattern or regulate pattern in manual jig frequency in automatic jig frequency; If oil pumper is to regulate pattern in manual jig frequency, the jig frequency of manually carrying out oil pumper by staff regulates; If oil pumper is to regulate pattern in automatic jig frequency, enter step 5;
Step 5: control system for oil-pumping unit carries out the collection of pumping-unit workdone graphic data, according to gathering load-position diagram data acquisition load-position diagram, then analyzes the shape facility of the load-position diagram obtaining, and judges whether oil pumper exists fault;
Step 6: if oil pumper exists fault, oil pumper is carried out to fault handling; If oil pumper does not exist fault, judge oil pumper is taken out control between whether needing; If take out control between needing, take out control between by control system for oil-pumping unit, oil pumper being carried out; If take out control between not needing, enter step 7;
Step 7: by control system for oil-pumping unit, oil pumper is carried out to jig frequency and automatically regulate.
As shown in Figure 5, in described step 1, the quality of balance adjustment process of described oil pumper comprises the steps:
Step 101: judge that whether quality of balance is locked, if quality of balance is locked, finish to regulate flow process; If quality of balance does not have locked, enter step 102;
Step 102: calculate the quality of balance of oil pumper, quality of balance=down stroke peak power/upstroke peak power;
Step 103: whether the quality of balance that judges oil pumper is less than 80%; If the quality of balance of oil pumper is less than 80%, drive leading screw to step-length of large adjustment the small machine for balancing, increase the value of quality of balance; If the quality of balance of oil pumper is not less than 80%, enter step 104;
Step 104: whether the quality of balance that judges oil pumper is greater than 110%; If the quality of balance of oil pumper is greater than 110%, drive leading screw to step-length of little adjustment the small machine for balancing, reduce the value of quality of balance;
Step 105: the adjustment flow process that judges whether to finish quality of balance; If not, return to step 1; If so, finish to regulate flow process.
As shown in Figure 6, in described step 6, the process of taking out control between described comprises the steps:
Step 601: when control system for oil-pumping unit puts into production operation first, first setup parameter: area is completely taken out in artificial setting
, stop pumping area S
t, stop pumping duration T
swith oil pumping duration C
s;
Step 602: after oil pumper is started working, gather pumping-unit workdone graphic data to data analysis;
Step 603: oil pumper starts after oil pumping work, by the load-position diagram area average in first 10 minutes
completely take out area with artificial setting
compare; If
>=
* 90%, at the next cycle of the stopping duration C that will pump that takes out
sincrease
, by stop pumping duration T
sreduce
, return to step 1 undated parameter oil pumping duration C simultaneously
swith stop pumping duration T
s; If
<
* 90%, enter step 604;
Step 604: if
≤
* 70%, at the next cycle of the stopping duration C that will pump that takes out
sreduce
, by stop pumping duration T
sincrease
, return to step 1 undated parameter oil pumping duration C simultaneously
swith stop pumping duration T
s; If
>
* 70%, keep parameter oil pumping duration C
swith stop pumping duration T
sconstant.
In described step 602, gather pumping-unit workdone graphic data to after data analysis, also comprise and judge that artificial setting completely takes out area
, stop pumping area S
twhether need the step of upgrading; Completely take out area if need to upgrade artificial setting
, stop pumping area S
t, artificial setting is completely taken out to area
, stop pumping area S
tafter upgrading, return to step 1, carry out artificial setting and completely take out area
, stop pumping area S
treset; If do not need to upgrade, keep the artificial setting of parameter completely to take out area
, stop pumping area S
tconstant.
In described step 7, the method that described jig frequency regulates is automatically: determine the optimum frequency value that drives oil pumping owner motor inverter according to load-position diagram, drive main motor to realize jig frequency and regulate;
（1）
In above formula (1),
be the calculated value of the i time controlled frequency, the area of load-position diagram when Si is the i time controlled frequency, the area of load-position diagram when Si-1 is the i-1 time controlled frequency; Upper limiting frequency
the highest frequency of frequency converter permission work, lower frequency limit
be the low-limit frequency of frequency converter permission work, capping frequency and lower frequency limit, can ensure that output frequency, not higher than upper limiting frequency, is not less than lower frequency limit automatically.
The present invention relies on energy-saving controller, and a kind of efficient oil pumper energy-saving and frequency-variable method is provided.Energy-saving controller can carry out the real-time parameter such as machine, well aggregation process and control oil production equipment, realizes machine, well parameter matching, reaches optimum control.In actual applications, energy-saving controller often coordinates long distance control system, forms oil pumper intelligent energy-saving control system, and has " four is distant " function (see figure 1)s such as remote control, remote signalling, remote regulating, remote measurement.
Well head is designed to master-slave mode (see figure 2) by the present invention, at each well head, one of intelligent oil pumping machine frequency-conversion control cabinet is installed, mainly complete the collection of oil pumper individual well parameter and the Based Intelligent Control of oil pumper, then by data upload to RTU, RTU is uploaded to monitor supervision platform by wireless bridge by each individual well data, except parameter acquisition, well site is also provided with video monitoring, possesses intelligent video monitoring warning function and moving target and swarms into auto-alarm function.Monitor supervision platform is mainly realized remote monitoring and the telemanagement of oil well operation in conjunction with monitoring and control configuration software and merit figure intelligence Diagnosis of Work Conditions and merit figure oil measuring system.
As Fig. 1, in the control system in well site, comprise the equipment such as production monitoring platform, video monitoring platform, office computer, switch, wireless bridge, well site intelligent video monitoring apparatus, well site host RTU, intelligent oil pumping machine frequency-conversion control cabinet and oil pumper.The main motor of oil pumper drags four-bar mechanism oil pumper and does cycle mechanical motion, and crude oil is pumped into ground.Meanwhile, oil extractor operating parameter is reached RTU by various kinds of sensors, completed collection and the processing of load-position diagram data by RTU, and calculate the quality of balance, optimum jig frequency of oil pumper and take out control strategy, finally complete the dynamic adjustments of working conditions of oil extractor by driving arrangement.The parameter exchange on oil pumper and backstage realizes by GPRS.
Oil pumper individual well operation schematic diagram taking intelligent oil pumping machine frequency-conversion control cabinet as control core as shown in Figure 2.In intelligent oil pumping machine frequency-conversion control cabinet, establish RTU and frequency converter.RTU obtains the parameter of well head by wellhead temperature sensor and pressure transducer, obtain the parameter of oil pumping owner motor by scrambler.Frequency converter is received main motor optimum operation frequency values and upgrades the respective block register from RTU by MODBUS agreement, then drives the operation of oil pumping owner motor with this frequency values.Oil pumping owner motor drags four-bar linkage structure and does cycle mechanical motion, drives oil well pump to complete the pumping cycle, and crude oil is pumped into ground.In oil pumper operational process, angular displacement sensor, load transducer, wellhead temperature, flow, pressure transducer, three phase electrical parameters acquisition module etc. are passed the physical signalling conditioning perceiving back RTU for electric signal.In RTU, by the analysis of suspension point displacement signal and load signal being completed to collection and the processing of load-position diagram data, calculate the optimum jig frequency of oil pumper or take out control strategy by Energy Saving Control algorithm, then by the transducer drive owner's motor of pumping; By the analysis of oil pumping owner motor electrical quantity being completed to the calculating of balance of well pumping unit degree, then complete the adjusting of balance of well pumping unit degree by controlling balancing small machine.The transmitted in both directions of oil extractor operating parameter, load-position diagram parameter, far-end control parameter realizes by the GPRS wireless communication module being installed in Intelligent control cabinet.
RTU as the hardware connection layout of the RTU of oil pumper as shown in Figure 3, on the one hand, be responsible for oil pumper three phase electrical parameters, main motor and the collection of balancing small machine electric current, load-position diagram data and other sensor parameters the telecommunication of realization and host computer.On the other hand, by Real-time Collection to floor data complete the processing of algorithm and unit the external units such as frequency converter carried out to parameter control by MCU in sheet by DSP engine in the sheet of main control chip DSPIC33FJ256MC710, the jig frequency that finally realizes oil pumper regulates automatically, take out between intelligence and control and quality of balance regulates automatically.
The hardware device of digitizing oil pump energy-saving control system mainly comprises the intelligent remote detection and control terminal (RTU) as master controller, for load transducer and the angular displacement sensor of load-position diagram data acquisition, for gathering the three phase electrical parameters acquisition module of oil pumper electrical quantity, for limiting the limit switch of oil pumper stroke, for the voice module of start and stop prompting and fault alarm, for the Switching Power Supply to measuring and controlling equipment power supply, for charactron and the inlet wire fuse of jig frequency and quality of balance demonstration, Surge Protector, well heater, A.C. contactor, isolating switch, selector switch, the attached components and parts such as button and line connection terminal.
The mode control oil pumper that system adopts master controller and frequency converter to combine can automatically switch to power frequency pattern in the time of frequency converter failure, has clear in structure, and reliability is high, powerful, applying flexible, the advantage such as easy to operate.Master controller can carry out intellectual analysis and control oil extractor operating parameter the load-position diagram data that collect, make oil pumper and oilwell parameter keep Dynamic Matching, all the time in optimal operational condition, and can coordinate merit figure intelligence Diagnosis of Work Conditions and the merit figure oil measuring system of ipc monitor configuration software and oil gas Process research to realize fuel gauging, fault diagnosis and Based Intelligent Control etc.
System starts after also initialization, and quality of balance regulates with jig frequency and regulates parallel carrying out.Quality of balance regulates and is divided into manual adjustments and automatically regulates two kinds of patterns.Jig frequency regulates also automatic adjusting and two kinds of patterns of manual adjustments, whether participate in jig frequency according to frequency converter and regulate, the automatic adjusting of jig frequency has again dividing of power frequency pattern and variable mode, under variable mode, if frequency converter breaks down, automatically switch under power frequency pattern and move.System is in service, and Real-time Collection pumping-unit workdone graphic data are identified oil pumping machine fault (summary) by analyzing load-position diagram shape facility.Under jig frequency adjusting pattern automatically, if pump efficiency is too low, between needing, take out, between formulating by analysis load-position diagram area, take out control strategy; If taken out between not needing, determine the best output frequency of the frequency converter of controlling oil pumping owner motor according to load-position diagram area, automatically regulate beam-pumping unit jig frequency.
Efficient oil pumper energy-saving and frequency-variable method of the present invention has the feature of the following aspects.
(1) automatic adjusting balance.Balance of well pumping unit degree is down stroke peak power and the ratio of upstroke peak power, and quality of balance thinks that balance of well pumping unit degree is qualified between 80%～110% time, otherwise judges that balance of well pumping unit degree is as defective;
If quality of balance does not have locked, judge the quality of balance of oil pumper according to power method.If quality of balance is less than 80%, when quality of balance is too low, drive leading screw to increase quality of balance value to step-length of large adjustment by balancing small machine.Equally, if quality of balance is greater than 110%, when quality of balance is too high, oppositely adjusts a step-length and reduce quality of balance, do again afterwards the calculating of quality of balance, until the quality of balance of oil pumper reaches optimum condition (see figure 4).
(2) automatically adjust jig frequency.Determine the optimum frequency value that drives oil pumping owner motor inverter according to load-position diagram, drive main motor to realize jig frequency and regulate.
In formula,
be
ithe calculated value of inferior controlled frequency, upper limiting frequency
the highest frequency of frequency converter permission work, lower frequency limit
be the low-limit frequency of frequency converter permission work, capping frequency and lower frequency limit, can ensure that output frequency, not higher than upper limiting frequency, is not less than lower frequency limit automatically;
(3) Intelligent intermittent control.Along with the continuity that pump is found time, down-hole liquid supply speed is unable to catch up with the pumping speed of oil pumper, and working fluid level declines gradually, and pump efficiency reduces gradually, and it is shrivelled that load-position diagram becomes, and area reduces, and oil well liquid-supplying is wretched insufficiency, starts to produce " sky is taken out " phenomenon.Between intelligence, take out control, that is: have oil just to take out, just shut down without oil.
When control system puts into production operation first, according to oil field actual production data, set manually and completely take out area
, stop pumping area
, stop pumping duration
with oil pumping duration
four parameters, completely taking out area as set is 50KN
m, stop pumping area is 18KN
m, stop pumping duration is 2 hours, oil pumping duration is 1 hour.After rising and taking out, by the load-position diagram area average in first 10 minutes
with completely take out Area comparison, completely take out 90% of area if be more than or equal to, next take out the cycle of stopping will pump duration increase
, stop pumping duration is reduced
; Completely take out 70% of area if be less than or equal to, take out the cycle of stopping oil pumping duration is reduced next
, stop pumping duration is increased
; If be greater than 70% and be less than and completely take out 90% of area, maintain raw parameter constant.After this, every calculating of carrying out a load-position diagram average area for 10 minutes, as measured indicator diagram area S, when
time, stop pumping, after stop pumping duration finishes, has again started shooting and has taken out.
In the process of calculating load-position diagram area for every 10 minutes, when within continuous 2 hours, above variation is all in 10% if there is the difference of area, thinks and found new stop pumping area, with this new data more
.If started shooting at every turn continuous two hours of the mean value of 10 minutes load-position diagram areas at initial stage be all more than or equal to above completely take out area 110% time, think and found new expiring to take out area, with this new data more
.So far, data
,
,
with
obtain dynamically updating (see figure 5).
(4) fault diagnosis based on dynamometer card analysis.In the load-position diagram of oil pumper, contained abundant work information, can judge oil pumper working condition and underground working by analyzing load-position diagram, when specific works, native system can be judged 18 kinds of typical conditions according to load-position diagram.
Claims (5)
1. an efficient oil pumper energy-saving and frequency-variable method, is characterized in that, comprises the steps:
Step 1: after opening device, carry out the initialization of control system for oil-pumping unit, the quality of balance of carrying out oil pumper regulates;
Step 2: judge that oil pumper is in power frequency mode of operation or variable frequency work pattern; If in power frequency mode of operation, keep the duty of oil pumper in power frequency mode of operation; If oil pumper in variable frequency work pattern, judges whether frequency converter exists fault;
Step 3: if frequency converter exists fault, oil pumper is adjusted to power frequency mode of operation, and kept the duty of oil pumper in power frequency mode of operation; If frequency converter does not have fault, enter step 4;
Step 4: judge that oil pumper is to regulate pattern or regulate pattern in manual jig frequency in automatic jig frequency; If oil pumper is to regulate pattern in manual jig frequency, the jig frequency of manually carrying out oil pumper by staff regulates; If oil pumper is to regulate pattern in automatic jig frequency, enter step 5;
Step 5: control system for oil-pumping unit carries out the collection of pumping-unit workdone graphic data, according to gathering load-position diagram data acquisition load-position diagram, then analyzes the shape facility of the load-position diagram obtaining, and judges whether oil pumper exists fault;
Step 6: if oil pumper exists fault, oil pumper is carried out to fault handling; If oil pumper does not exist fault, judge oil pumper is taken out control between whether needing; If take out control between needing, take out control between by control system for oil-pumping unit, oil pumper being carried out; If take out control between not needing, enter step 7;
Step 7: by control system for oil-pumping unit, oil pumper is carried out to jig frequency and automatically regulate.
2. the efficient oil pumper energy-saving and frequency-variable of one according to claim 1 method, is characterized in that, in described step 1, the quality of balance adjustment process of described oil pumper comprises the steps:
Step 101: judge that whether quality of balance is locked, if quality of balance is locked, finish to regulate flow process; If quality of balance does not have locked, enter step 102;
Step 102: calculate the quality of balance of oil pumper, quality of balance=down stroke peak power/upstroke peak power;
Step 103: whether the quality of balance that judges oil pumper is less than 80%; If the quality of balance of oil pumper is less than 80%, drive leading screw to step-length of large adjustment the small machine for balancing, increase the value of quality of balance; If the quality of balance of oil pumper is not less than 80%, enter step 104;
Step 104: whether the quality of balance that judges oil pumper is greater than 110%; If the quality of balance of oil pumper is greater than 110%, drive leading screw to step-length of little adjustment the small machine for balancing, reduce the value of quality of balance;
Step 105: the adjustment flow process that judges whether to finish quality of balance; If not, return to step 1; If so, finish to regulate flow process.
3. the efficient oil pumper energy-saving and frequency-variable of one according to claim 1 method, is characterized in that, in described step 6, the process of taking out control between described comprises the steps:
Step 601: when control system for oil-pumping unit puts into production operation first, first setup parameter: area is completely taken out in artificial setting
, stop pumping area S
t, stop pumping duration T
swith oil pumping duration C
s;
Step 602: after oil pumper is started working, gather pumping-unit workdone graphic data to data analysis;
Step 603: oil pumper starts after oil pumping work, by the load-position diagram area average in first 10 minutes
completely take out area with artificial setting
compare; If
>=
* 90%, at the next cycle of the stopping duration C that will pump that takes out
sincrease
, by stop pumping duration T
sreduce
, return to step 1 undated parameter oil pumping duration C simultaneously
swith stop pumping duration T
s; If
<
* 90%, enter step 604;
Step 604: if
≤
* 70%, at the next cycle of the stopping duration C that will pump that takes out
sreduce
, by stop pumping duration T
sincrease
, return to step 1 undated parameter oil pumping duration C simultaneously
swith stop pumping duration T
s; If
>
* 70%, keep parameter oil pumping duration C
swith stop pumping duration T
sconstant.
4. the efficient oil pumper energy-saving and frequency-variable of one according to claim 3 method, is characterized in that, in described step 602, gathers pumping-unit workdone graphic data to after data analysis, also comprises and judges that artificial setting completely takes out area
, stop pumping area S
twhether need the step of upgrading; Completely take out area if need to upgrade artificial setting
, stop pumping area S
t, artificial setting is completely taken out to area
, stop pumping area S
tafter upgrading, return to step 1, carry out artificial setting and completely take out area
, stop pumping area S
treset; If do not need to upgrade, keep the artificial setting of parameter completely to take out area
, stop pumping area S
tconstant.
5. the efficient oil pumper energy-saving and frequency-variable of one according to claim 1 method, it is characterized in that, in described step 7, the method that described jig frequency regulates is automatically: determine the optimum frequency value that drives oil pumping owner motor inverter according to load-position diagram, drive main motor to realize jig frequency and regulate;
（1）
In above formula (1),
be the calculated value of the i time controlled frequency, the area of load-position diagram when Si is the i time controlled frequency, the area of load-position diagram when Si-1 is the i-1 time controlled frequency; Upper limiting frequency
the highest frequency of frequency converter permission work, lower frequency limit
be the low-limit frequency of frequency converter permission work, capping frequency and lower frequency limit, can ensure that output frequency, not higher than upper limiting frequency, is not less than lower frequency limit automatically.
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