CN106527123B - The control method of adjust automatically jig frequency frequency - Google Patents

The control method of adjust automatically jig frequency frequency Download PDF

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Publication number
CN106527123B
CN106527123B CN201510577859.3A CN201510577859A CN106527123B CN 106527123 B CN106527123 B CN 106527123B CN 201510577859 A CN201510577859 A CN 201510577859A CN 106527123 B CN106527123 B CN 106527123B
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CN
China
Prior art keywords
frequency
frequency converter
control method
converter
step
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CN201510577859.3A
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Chinese (zh)
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CN106527123A (en
Inventor
郑隆傑
李翔
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台达电子工业股份有限公司
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Abstract

A kind of control method of the present invention about adjust automatically jig frequency frequency, comprising steps are as follows: (S1) driving frequency converter is started operation with initial frequency;(S2) point defines frequency range on the basis of the current operation frequency of frequency converter, and frequency range equal part is taken out multiple Frequency points;(S3) control frequency converter is run with each Frequency point, to obtain the frequency converter judgement parameter corresponding when each Frequency point is run;(S4) optimal judgement parameter is found, and controls frequency converter and changes with the running of Frequency point corresponding to optimal judgement parameter;(S5) judge whether the current operation frequency of frequency converter is less than minimum lower frequency limit;(S6) when the judging result of step (S5), which is, is, judge whether the current operation frequency of frequency converter reaches setting number less than the read-around ratio of minimum lower frequency limit;(S7) when the judging result of step (S6), which is, is, control frequency converter executes standby mode.

Description

The control method of adjust automatically jig frequency frequency

Technical field

The present invention is a kind of control method, espespecially a kind of adjust automatically jig frequency frequency applied to a pumping unit drive system Control method.

Background technique

With economic development, status of the petroleum in various countries' economy is further significant.In order to acquire the petroleum in oil well, just must Reached using a pumping unit drive system.

In general, pumping unit drive system includes an oil rig, a frequency converter, a motor unit and a remote monitoring Device.Wherein oil rig, frequency converter and motor unit frequency converter are adjacent to oil well, and frequency converter is controlled using an operation frequency The revolving speed of motor unit processed, motor unit then drive oil rig to operate, and carry out the sucker rod in oil rig reciprocating Linear motion, drive the oil well pump of oil rig being located under oil well to be acted on whereby, and usually oil pumping per minute The number that bar moves back and forth is known as jig frequency, and jig frequency frequency actually corresponds to the setpoint frequency of frequency converter.Remote monitoring device It is used in the load capacity and oil rig of the sucker rod then transmitted by the way of distal end via radio transceiver by oil rig Come a rotation angle of the crankshaft for driving sucker rod to move, and generates an oil well using the load capacity and the rotation angle and show Function figure (working dynagraph) makes monitoring personnel that can analyze oil well life by monitoring indicator card in remote monitoring device Occurrence condition, and according to analysis result notice oil recovery personnel, oil recovery personnel then go to oil well in response to analysis result to manually adjust and become The operation frequency of frequency device with the jig frequency frequency of corresponding adjustment oil rig, and then makes oil rig can be according to oil well production situation To correspond to running.

However traditional pumping unit drive system is only capable of going to oil well by oil recovery personnel to manually adjust the running of frequency converter Frequency, therefore when having inconvenient traffic or weather conditions are bad, oil recovery personnel will be unable to go to oil well to frequency converter in time Operation frequency carries out optimization adjustment, in this way, will affect oil-producing efficiency while causing the burden of person works.

Therefore, how to develop a kind of control method of adjust automatically jig frequency frequency that can improve above-mentioned prior art missing, Actually correlative technology field person problem in the urgent need to address at present.

Summary of the invention

The main object of the present invention is to provide a kind of control method of adjust automatically jig frequency frequency, can be made using the present invention The pumping unit drive system of control method improves oil-producing efficiency and reduces the burden of person works, and makes pumping unit drive system Oil rig is to be operated in a manner of zero by jig frequency frequency when the oil mass of oil well is bad, reduces electric energy loss whereby and extends simultaneously The service life of oil rig.

In order to achieve the above object, the present invention provides a kind of control method, suitable for frequency converter, frequency converter is to control oil pumping The jig frequency frequency of device, and jig frequency frequency corresponds to the operation frequency of frequency converter, control method includes that steps are as follows: (S1) driving Frequency converter executes start-up mode and starts operation, and is operated with initial frequency;(S2) using the current operation frequency of frequency converter as base Frequency range is defined on schedule, and frequency range equal part is taken out into multiple Frequency points different each other;(S3) frequency converter is controlled With the operation of each Frequency point, to obtain the frequency converter judgement parameter corresponding when each Frequency point is run, wherein each judgement Parameter is reflected in the pumping efficiency of oil rig when the operation of corresponding Frequency point;(S4) join in multiple judgements of multiple Frequency points Optimal judgement parameter is found in number, and is controlled frequency converter and changed with the running of Frequency point corresponding to optimal judgement parameter, with right The jig frequency frequency of oil rig should be adjusted;(S5) judge whether the current operation frequency of frequency converter is less than minimum lower frequency limit, and When judging result is no, step (S2) is executed again, and when judging result, which is, is, it performs the next step rapid;(S6) work as step (S5) judging result is when being, to judge whether the current operation frequency of frequency converter reaches less than the read-around ratio of minimum lower frequency limit To setting number, and when judging result is no, step (S2) is executed again, and when judging result, which is, is, it performs the next step Suddenly;And (S7), when the judging result of step (S6), which is, is, control frequency converter executes standby mode, and when the first setting of maintenance Between after re-execute the steps (S1).

Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the pumping unit drive system of present pre-ferred embodiments.

Fig. 2 is the step flow chart of the control method of present pre-ferred embodiments.

Wherein, appended drawing reference

1: pumping unit drive system

2: oil rig

20: sucker rod

21: oil well pump

22: moving sensor

23: load sensor

24: crankshaft

3: frequency converter

30: control unit

4: motor unit

5: remote monitoring device

S1~S7: the step of control method

Specific embodiment

Technical solution of the present invention is described in detail in the following with reference to the drawings and specific embodiments, to be further understood that The purpose of the present invention, scheme and effect, but it is not intended as the limitation of scope of the appended claims of the present invention.

Referring to Fig. 1, the structural schematic diagram of its pumping unit drive system preferably implemented for the present invention.As shown in Figure 1, this The pumping unit drive system 1 of embodiment includes an oil rig 2, a frequency converter 3 and a motor unit 4.Frequency converter 3 has a control Unit 30 processed, control unit 30 make frequency converter 3 according to the operation frequency of itself to control the operation frequency of frequency converter 3 And correspond to the revolving speed of control motor unit 4.Motor unit 4 then drives oil rig 2 to operate, and makes the oil pumping in oil rig 2 Bar 20 carries out shuttle linear motion, drives an oil well pump 21 of oil rig 2 to be acted on whereby, to extract in oil well Petroleum, wherein the jig frequency frequency of the sucker rod 20 of oil rig 2 is actually controlled by the operation frequency of frequency converter 3.

In above-described embodiment, oil rig 2 with more a displacement sensor 22 and a load sensor 23, respectively with change The control unit 30 of frequency device 3 communicates, and wherein displacement sensor 22, which is used to sense, is used to that sucker rod 20 is driven to transport in oil rig 2 One rotation angle of the crankshaft 24 made, load cell 23 are then used to sense the load capacity on sucker rod 20.In addition, frequency conversion The sensing result that the control unit 30 of device 3 can more be transmitted according to displacement sensor 22 and load sensor 23, that is, according to this It rotates angle and the load capacity and analyzes one about oil well oil mass (actually also corresponding to the pumping efficiency of sucker rod 20) Oil well indicator card, and the operation frequency of frequency converter 3 is dynamically adjusted according to oil well indicator card, wherein different in frequency converter 3 Under operation frequency, i.e., under the different jig frequency frequency of oil rig 2, it is phase that control unit 30, which analyzes the oil well indicator card come, It is different.In addition, control unit 30 has the function of numeration and timing in some embodiments.What is more, pumping unit drive system 1 has more a remote monitoring device 5, the load capacity transmitted by the way of distal end via radio transceiver by oil rig 2 And the rotation angle, and then analyze and show the oil well indicator card, make user that can monitor the functioning condition of oil rig 2.

It please refers to Fig. 2 and cooperates Fig. 1, wherein Fig. 2 is the step flow chart of the control method of present pre-ferred embodiments.Such as Shown in Fig. 1, Fig. 2, the control method of the present embodiment be can be applied in the control unit 30 of frequency converter 3 shown in FIG. 1, and include step Rapid as follows: firstly, executing step S1, driving frequency converter 3 starts operation and executes a start-up mode, and elder generation with an initial frequency into Row running.Then, step S2 is executed, point defines a frequency range on the basis of the operation frequency current by frequency converter 3, by the frequency Rate range equal part and take out multiple Frequency points different each other.Then, step S3 is executed, controls frequency converter 3 with each Frequency point Short-time duty, to obtain the judgement parameter corresponding in the operation of each Frequency point of frequency converter 3, wherein each judgement parameter can be anti- Reflect the pumping efficiency of the oil rig 2 when with the operation of corresponding Frequency point of frequency converter 3.Then, step S4 is executed, in multiple frequencies Optimal judgement parameter is found in the corresponding multiple judgement parameters of point, and controls frequency converter 3 and changes with optimal judgement parameter institute Corresponding Frequency point running, with the jig frequency frequency of corresponding adjustment oil rig 2.Then, step S5 is executed, judges that frequency converter 3 is worked as Whether preceding operation frequency is less than a minimum lower frequency limit.

When the judging result of step S5, which is, is, S6 is thened follow the steps, judges that the current operation frequency of frequency converter 3 is less than most Whether the read-around ratio of low lower frequency limit reaches a setting number.Conversely, then being held again when the judging result of step S5 is no Row step S2.

In addition, just executing step S7 when the judging result of step S6, which is, is, control frequency converter 3 executes a standby mode, And S1 is re-execute the steps after maintaining the first setting time.Conversely, executing step again when step S6 judging result is no S2。

In some embodiments, the method that step S2 defines frequency range is actually the running current with frequency converter 3 One preset frequency of point superposition on the basis of frequency, such as 5Hz, and constitute one first and define frequency, and the running current with frequency converter 3 Point subtracts preset frequency and constitutes one second and define frequency on the basis of frequency, and then defines first and define frequency and this second is defined Frequency separation between frequency is the frequency range.For example, when the current operation frequency of frequency converter 3 is 30Hz, first It defines frequency then and is 30Hz and be 35Hz plus 5Hz, second, which defines frequency then, is that 30Hz subtracts 5Hz and is 25Hz, therefore the frequency Range is just 25Hz between 35Hz.In addition, frequency range is divided into seven parts and takes out eight Frequency points in step S2 Be preferred, therefore when frequency range is, for example, 25Hz to 35Hz, eight Frequency points be respectively 25Hz, { 25+ (10/7) } Hz, {25+2*(10/7)}Hz、{25+3*(10/7)}Hz、{25+4*(10/7)}Hz、{25+5*(10/7)}Hz、(25+6*10/7)Hz And 35Hz.

In some embodiments, judge that parameter can be an oil well indicator card described in step S3, by the control of frequency converter 3 Unit 30 processed is analyzed to obtain according to the sensing result that displacement sensor 22 and load sensor 23 are transmitted, and so judges parameter simultaneously It is not limited, in other embodiments, judging parameter also can be a torque of motor unit 4.In addition, in step S4, when When judging parameter for oil well indicator card, then have maximum value for optimal judgement parameter with area shown in oil well indicator card. And when judging parameter for the torque of motor unit 4, then maximum torque is optimal judgement parameter, at this time oil rig 2 Change one torque sensing device of setting to replace displacement sensor 22 shown in FIG. 1 and load sensor 23, and control unit 30 is also It communicates with the torque sensing device.And in step S7, when frequency converter 3 executes standby mode, the operation frequency of frequency converter 3 is real It is zero on border, therefore the jig frequency frequency of oil rig 2 actually also corresponds to zero.

In conclusion the present invention provides a kind of control method of adjust automatically jig frequency frequency, in frequency converter operation In, it first obtains difference corresponding to different frequency point and judges parameter, to find optimal judgement parameter, and then automatic and dynamic is adjusted The operation frequency of whole frequency converter operates frequency converter all with Frequency point corresponding to optimal judgement parameter, even if also taking out The jig frequency frequency of oily device adjust automatically in an optimized manner, in this way, pumping unit drive system of the invention can only by Monitoring personnel is monitored in remote monitoring device, and arrives the jig frequency frequency of oil well adjustment oil rig at any time without oil recovery personnel Rate is that oil-producing efficiency can be improved with pumping unit drive system of the invention and reduce the burden of person works.What is more, of the invention Control method can the current operation frequency of frequency converter be less than minimum lower frequency limit read-around ratio reach setting number time control Frequency converter processed executes standby mode, transport oil rig can when the oil mass of oil well is bad in a manner of jig frequency frequency zero Make, reduces the service life that electric energy loss extends oil rig simultaneously whereby.

Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe It knows those skilled in the art and makes various corresponding changes and modifications, but these corresponding changes and change in accordance with the present invention Shape all should fall within the scope of protection of the appended claims of the present invention.

Claims (8)

1. a kind of control method of adjust automatically jig frequency frequency, which is characterized in that the change suitable for a pumping unit drive system In frequency device, which further includes a motor unit and an oil rig, and the frequency converter is to control the motor The revolving speed of group, the jig frequency frequency for making the corresponding running for driving the oil rig of the motor unit and controlling the oil rig, should Control method includes that steps are as follows:
(S1) frequency converter is driven to execute a start-up mode and start operation, and with a starting frequency operation;
(S2) on the basis of the current operation frequency of the frequency converter point define a frequency range, and by the frequency range equal part and Take out multiple Frequency points different each other;
(S3) frequency converter is controlled to run with each Frequency point, it is right to obtain frequency converter institute when each Frequency point is run One answered judges parameter, wherein each judgement parameter is reflected in the oil pumping of the oil rig when operation of the corresponding Frequency point Efficiency;
(S4) the optimal judgement parameter is found in multiple judgement parameters of multiple Frequency points, and controls the frequency converter and changes With the running of the Frequency point corresponding to the optimal judgement parameter, with corresponding jig frequency frequency for adjusting the oil rig;
(S5) judge the current operation frequency of the frequency converter whether less than a minimum lower frequency limit, and in judging result be it is no when, Step (S2) is executed again, and when judging result, which is, is, it performs the next step rapid;
(S6) when the judging result of step (S5), which is, is, judge that the current operation frequency of the frequency converter is less than the minimum lower frequency limit Whether the read-around ratio of rate reaches a setting number, and when judging result is no, executes step (S2) again, and ties in judgement Fruit is to perform the next step rapid when being;And
(S7) it when the judging result of step (S6), which is, is, controls the frequency converter and executes a standby mode, and maintain one first to set (S1) is re-execute the steps after fixing time.
2. control method as described in claim 1, which is characterized in that in step (S2), with the current running of the frequency converter Point is superimposed a preset frequency and constitutes one first and define frequency on the basis of frequency, and using the current operation frequency of the frequency converter as base Subtract the preset frequency on schedule and constitute one second and define frequency, and define this first define frequency and this second define frequency it Between be the frequency range.
3. control method as described in claim 1, which is characterized in that in step (S2), which is divided into seven Part and take out eight Frequency points.
4. control method as described in claim 1, which is characterized in that this judges parameter for an oil well indicator card.
5. control method as claimed in claim 4, which is characterized in that in step (S4), shown in the oil well indicator card Area have maximum value be the optimal judgement parameter.
6. control method as described in claim 1, which is characterized in that this judges parameter for the big of a torque of the motor unit It is small.
7. control method as claimed in claim 6, which is characterized in that be best with the maximum torque in step (S4) The judgement parameter.
8. control method as described in claim 1, which is characterized in that under the standby mode, the operation frequency of the frequency converter It is zero.
CN201510577859.3A 2015-09-11 2015-09-11 The control method of adjust automatically jig frequency frequency CN106527123B (en)

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CN102213084A (en) * 2011-05-23 2011-10-12 中国石油天然气股份有限公司 Stroke frequency regulating device of oil pumping machine
CN102865053A (en) * 2011-07-04 2013-01-09 中国石油天然气股份有限公司 Method and device for judging optimal times of stroke of pumping unit
CN103573219A (en) * 2012-07-31 2014-02-12 新疆敦华石油技术有限公司 Automatic frequency conversion device and method for pumping units
CN103885367A (en) * 2014-04-01 2014-06-25 东营东日电气有限公司 Pumping unit intelligent control system and method based on optimal stroke frequency identification

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Publication number Priority date Publication date Assignee Title
GB2089531A (en) * 1980-10-14 1982-06-23 American Davidson Inc Control of vibration of an oil-pump assembly
US7330779B2 (en) * 2004-06-18 2008-02-12 Unico, Inc. Method and system for improving pump efficiency and productivity under power disturbance conditions
CN102213084A (en) * 2011-05-23 2011-10-12 中国石油天然气股份有限公司 Stroke frequency regulating device of oil pumping machine
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CN103573219A (en) * 2012-07-31 2014-02-12 新疆敦华石油技术有限公司 Automatic frequency conversion device and method for pumping units
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