CN106199425B - A method of for judging whether motor of oil extractor uses discontinuous power supply - Google Patents
A method of for judging whether motor of oil extractor uses discontinuous power supply Download PDFInfo
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- CN106199425B CN106199425B CN201610497911.9A CN201610497911A CN106199425B CN 106199425 B CN106199425 B CN 106199425B CN 201610497911 A CN201610497911 A CN 201610497911A CN 106199425 B CN106199425 B CN 106199425B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The method whether the invention discloses a kind of uses discontinuous power supply for judging motor of oil extractor, the electrical quantity such as the discrete power during function are transported using the motor measured is acquired simultaneously off-line identification, judge motor if appropriate for discontinuous power supply Energy Saving Control according to identification result and power-off criterion, if meeting power-off criterion, power-off interval selection is carried out according to the power curve feature not having under operating condition.This method is mainly used in periodical potential energy load and has electronic and generating operation mode electric motor system within a duty cycle, and major function is to be judged motor if appropriate for discontinuous power supply Energy Saving Control and the optimal power-off control strategy of selection according to operating condition.It can judge to control if appropriate for discontinuous power supply online by the industry and mining city of a duty cycle, provide foundation for whether equipment needs to install, therefore artificial and equipment cost can be greatly lowered.
Description
Technical field
The invention belongs to energy saving motor control technology fields, more particularly to one kind for judging that motor of oil extractor is
The no method using discontinuous power supply.
Background technique
Domestic and international oil field equipment is mostly beam pumping unit, in order to realize good starting performance, while energy
It is enough to improve electric efficiency to greatest extent, pumping-unit motor in capacity configuration " low load with strong power " phenomenon there are ratios
It is gradually reduced, therefore the application range of the energy conservation measures such as corresponding pressure regulation, the conversion of star angle is gradually reduced, energy-saving effect is also
It reduces.And discontinuous power supply technology does not require load-rate of motor, only to the variation tendency of load power curve, electronic and hair
Electric feature has certain requirement, and therefore, discontinuous power supply technology has biggish application range.But discontinuous power supply technology is not particularly suited for
All oil well loads pass through according to the operation characteristic of motor of oil extractor system and oil well load feature in control process
To the on-line checking of motor of oil extractor operation electrical quantity, judge different oil well loads if appropriate for using discontinuous power supply technology.
The diversity feature of pumping unit load:
1) there is generator operation operating condition in beam pumping unit load mostly, but has a small number of oil wells due to liquid component and put down
The reasons such as weighing apparatus configuration, power generation process is of short duration even without power generation process, in this way can be to the stability and its section that discontinuous power supply controls
Energy effect impacts.
2) due to the complexity of underground hole condition, different pumping unit loads have different variation characteristics；Same is taken out
Oil machine, the power variation rate on different load region in a load period are also different.When load change dramatically, power becomes
Rate is high, and implementing discontinuous power supply control has larger difficulty, or even will affect pumpingh well normal safe operation.
In discontinuous power supply control, it is therefore intended that realize the energy conservation of pumping-unit motor and complete by discontinuous power supply technology
At " power-off do not shut down, is powered without impact " controlling unit.This requires load powers to change according to certain rule, is not to appoint
The load of meaning variation is suitable for discontinuous power supply control, if discontinuous power supply control is applied on unsuitable load, can go out
Now not only not energy-efficient the case where more consuming energy instead, or even the case where will appear pumping unit job insecurity；In addition to this, for suitable
It closes for the oil well load for implementing discontinuous power supply control, in order to reach best energy-saving effect and not influence the normal steady of pumping unit
Fixed work, selects suitable outage area particularly important.
Motor of oil extractor discontinuous power supply power-saving technology has been widely used for oil pumping in oil fields work, the oil pumping of the prior art
When electric motor implements discontinuous power supply technology, control cabinet directly often is installed in motor side, without investigating the oil well in advance
Load is controlled if appropriate for application discontinuous power supply, and which results in after control cabinet puts into operation, internal judgment can not be implemented
Discontinuous power supply control technology, and it is constantly in continuous power supply state, so as to cause the waste of equipment.
If appropriate for using disconnected when therefore, it is desirable to have one kind for judging the load of motor of oil extractor drive cycle potential energy
The determination method of continuous power supply energy-saving control is transformed, and is a kind of direction of the following energy-saving control management system development, is existing
The emphasis of technical research.
Summary of the invention
Discontinuous power supply control technology is widely used in periodical potential energy load Energy Saving Control field, however and not all week
The load of phase property potential energy is suitable for carrying out discontinuous power supply control.Therefore, stable in order to guarantee, equipment investment is saved, is prejudged
Different cycles load becomes particularly important if appropriate for discontinuous power supply control.The present invention is directed to discontinuous power supply energy-conserving control technology
The problems such as operation stability and energy-saving efficiency is deposited under different loads operating condition proposes and a kind of is sentenced according to load behavior
Determination method and device of the disconnected motor of oil extractor if appropriate for discontinuous power supply.I.e. the purpose of the present invention is to provide one kind to be used for
Judge whether motor of oil extractor using the method for discontinuous power supply overcomes the above-mentioned problems in the prior art.
To achieve the above object, the present invention provides a kind of for judging whether motor of oil extractor uses the side of discontinuous power supply
Method, using the motor operation electrical quantity measured, the discrete power of motor operation course obtained by calculation is filtered, divides
Area's processing, analyzes changed power feature, judges energy saving if appropriate for discontinuous power supply is used when the load of electric motor driven cycle potential energy
Control；
Multiple spot filtering is carried out to the discrete power p (k) being calculated, and records filtered power curve；Filtering type is such as
Under:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_FilterIt (i) is after multi-point average
Filtered power point, i, j, k=1,2,3....；
The filtered power P being calculated_Filter(i) electronic decline region, power generation region and electronic rising area are marked off
The filtered power in domain, each region respectively indicates are as follows: pdx(i)、pfd(i)、pds(i)；
The minus continuum of filtered power is power generation region, and duration is Δ Tf；Filtered power is greater than
Zero continuum is electric zone, and the region that wherein filtered power continuously rises is electronic elevated areas, and filtered power is continuous
The region of decline is electronic decline region；
As the duration Δ TfLess than pumping unit cycle of operation T 8% when, be not suitable for power-off energy saving control；When
The duration Δ TfGreater than pumping unit cycle of operation T 8% when, be suitble to using power-off energy saving control.
Preferably, the pfd(i)、pds(i) region carries out power variation rate analysis, and formula is as follows:
P′Filter(i)=| P_Filter(i+1)-P_Filter(i)|/P0(i=1,2,3...)
Wherein P0For motor rated power.
To P 'Filter(i) discrete function is maximized, and formula is as follows:
P′max=max (P 'Filter(i))
P is calculated separately out by above-mentioned formulafd(i)、pds(i) the maximum power variation value P ' in regionfdmax、P′dsmax。
Preferably, as P 'fdmax、P′dsmaxIn at least one value be less than or equal to 0.3 when, then meet discontinuous power supply control want
It asks, carries out power-off program analysis；Such as P 'fdmax、P′dsmaxWhen all greater than 0.3, then it is unsatisfactory for discontinuous power supply control and requires.
Preferably, it is divided into three kinds of discontinuous power supply control programs according to power-off is different with power supply Input area；
Scheme 1: decline region P in the power of electronic operating conditiondx(i) it runs slowly after powering off to power generation region Pfd(i), add
Power supply is put into when speed operation to synchronizing speed；
Scheme 2: in power generation region Pfd(i) Accelerating running is to electronic elevated areas P after powering offds(i), it runs slowly to same
Power supply is put into when leg speed is spent；
Scheme 3: in electronic decline region Pdx(i) decelerating through motor is run after powering off, by power generation region Pfd(i) accelerate fortune
In electronic elevated areas P after rowds(i) power supply is put into when being decelerated to synchronizing speed.
Preferably, judge whether motor of oil extractor uses discontinuous power supply in the following way:
1) as only P 'dsmaxWhen≤0.3, and meet Δ TfGreater than the 15% of the pumping unit cycle of operation, then selection scheme 3；
As only P 'dsmaxWhen≤0.3, and meet Δ TfLess than the 15% of the pumping unit cycle of operation, then selection scheme 2；
2) as only P 'fdmaxWhen≤0.3, then selection scheme 1；
3) as P 'dsmax、P′fdmaxWhen simultaneously≤0.3, as Δ TfGreater than the pumping unit cycle of operation 15% when, then selecting party
Case 3；
As Δ TfLess than the pumping unit cycle of operation 15% when, and P 'fdmax< P 'dsmaxWhen, then selection scheme 1；
As Δ TfLess than the pumping unit cycle of operation 15% when, and P 'fdmax> P 'dsmaxWhen, then selection scheme 2.
The present invention has fully considered the parameters such as oil well load feature, including continuous power-off time, region load changing rate,
When motor does not install control cabinet, the oil well load can be tested if appropriate for discontinuous power supply control technology is applied, if passed through
Test judges that the oil well load is not suitable for such power-saving technology, then no longer installs discontinuous power supply control cabinet, section for this motor
Equipment investment has been saved, the wasting of resources is avoided.
The invention has the benefit that
Proposed by the invention is used to judge that pumping unit if appropriate for the determination method of discontinuous power supply, can be directed to different oil
Well load carries out precision analysis, has fully considered oil well load feature, can be segmented oil well load different characteristic section,
Including parameters such as continuous power-off time, region load changing rates, according to the characteristic interval of different load, judge whether the load is full
Sufficient discontinuous power supply criterion；Method proposed by the invention can be used for examining whether pumping unit needs to install discontinuous power supply control cabinet,
Equipment investment is saved, the wasting of resources is avoided.
Detailed description of the invention
Attached drawing 1 is judgement pumping unit of the present invention if appropriate for discontinuous power supply flow chart；
Attached drawing 2 is the A load power curve of device acquisition of the present invention；
Attached drawing 3 is device of the present invention by 10 points of filtered waveforms of A load power curve；
Attached drawing 4 is the region division schematic diagram that carries out after the filtering of the present invention by load A power curve；
Attached drawing 5 is load A power variation rate waveform diagram of the present invention；
Attached drawing 6 is the B load power curve of device of the present invention acquisition；
Attached drawing 7 is the region division schematic diagram that carries out after the filtering of the present invention by load B power curve；
Attached drawing 8 is the C load power curve of device of the present invention acquisition；
Attached drawing 9 is the region division schematic diagram that carries out after the filtering of the present invention by load C power curve；
Attached drawing 10 is load C power variation rate waveform diagram of the present invention.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.In the accompanying drawings, identical from beginning to end or class
As label indicate same or similar element or element with the same or similar functions.Described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to use
It is of the invention in explaining, and be not considered as limiting the invention.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.Under
Face is described in detail the embodiment of the present invention in conjunction with attached drawing.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as protecting the present invention
The limitation of range.
In a broad embodiment of the invention: a kind of for judging whether motor of oil extractor uses the side of discontinuous power supply
Method, using the motor operation electrical quantity measured, the discrete power of motor operation course obtained by calculation is filtered, divides
Area's processing, analyzes changed power feature, judges energy saving if appropriate for discontinuous power supply is used when the load of electric motor driven cycle potential energy
Control；
Multiple spot filtering is carried out to the discrete power p (k) being calculated, and records filtered power curve；Filtering type is such as
Under:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_FilterIt (i) is after multi-point average
Filtered power point, i, j, k=1,2,3.....
The present invention has fully considered the parameters such as oil well load feature, including continuous power-off time, region load changing rate,
When motor does not install control cabinet, the oil well load can be tested if appropriate for discontinuous power supply control technology is applied, if passed through
Test judges that the oil well load is not suitable for such power-saving technology, then no longer installs discontinuous power supply control cabinet, section for this motor
Equipment investment has been saved, the wasting of resources is avoided.
Proposed by the invention is used to judge that pumping unit if appropriate for the determination method of discontinuous power supply, can be directed to different oil
Well load carries out precision analysis, has fully considered oil well load feature, can be segmented oil well load different characteristic section,
Including parameters such as continuous power-off time, region load changing rates, according to the characteristic interval of different load, judge whether the load is full
Sufficient discontinuous power supply criterion；Method proposed by the invention can be used for examining whether pumping unit needs to install discontinuous power supply control cabinet,
Equipment investment is saved, the wasting of resources is avoided.
Now according to attached drawing 1-10, embodiments of the present invention is described in detail.
The present invention provides a kind of method for whether using discontinuous power supply for judging motor of oil extractor, utilizes what is measured
Motor operation electrical quantity, the discrete power of motor process obtained by calculation is filtered, multidomain treat-ment, analyzes changed power
Feature judges when electric motor driven cycle potential energy loads if appropriate for using discontinuous power supply Energy Saving Control；
Multiple spot filtering is carried out to the discrete power p (k) being calculated, and records filtered power curve；Filtering type is such as
Under:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_FilterIt (i) is after multi-point average
Filtered power point, i, j, k=1,2,3.....
The filtered power P being calculated_Filter(i) electronic decline region, power generation region and electronic rising area are marked off
The filtered power in domain, each region respectively indicates are as follows: pdx(i)、pfd(i)、pds(i)；
The minus continuum of filtered power is power generation region, and duration is Δ Tf；Filtered power is greater than
Zero continuum is electric zone, and the region that wherein filtered power continuously rises is electronic elevated areas, and filtered power is continuous
The region of decline is electronic decline region.
As the duration Δ TfLess than pumping unit cycle of operation T 8% when, be not suitable for power-off energy saving control；When
The duration Δ TfGreater than pumping unit cycle of operation T 8% when, be suitble to using power-off energy saving control.
The pfd(i)、pds(i) region carries out power variation rate analysis, and formula is as follows:
P′Filter(i)=| P_Filter(i+1)-P_Filter(i)|/P0(i=1,2,3...)
Wherein P0For motor rated power.
To P 'Filter(i) discrete function is maximized, and formula is as follows:
P′max=max (P 'Filter(i))
P is calculated separately out by above-mentioned formulafd(i)、pds(i) the maximum power variation value P ' in regionfdmax、P′dsmax。
As P 'fdmax、P′dsmaxIn at least one value be less than or equal to 0.3 when, then meet discontinuous power supply control require, carry out
Power off program analysis；Such as P 'fdmax、P′dsmaxWhen all greater than 0.3, then it is unsatisfactory for discontinuous power supply control and requires.
It is divided into three kinds of discontinuous power supply control programs according to power-off is different with power supply Input area；
Scheme 1: decline region P in the power of electronic operating conditiondx(i) it runs slowly after powering off to power generation region Pfd(i), add
Power supply is put into when speed operation to synchronizing speed；
Scheme 2: in power generation region Pfd(i) Accelerating running is to electronic elevated areas P after powering offds(i), it runs slowly to same
Power supply is put into when leg speed is spent；
Scheme 3: in electronic decline region Pdx(i) decelerating through motor is run after powering off, by power generation region Pfd(i) accelerate fortune
In electronic elevated areas P after rowds(i) power supply is put into when being decelerated to synchronizing speed.
Judge whether motor of oil extractor uses discontinuous power supply in the following way:
1) as only P 'dsmaxWhen≤0.3, and meet Δ TfGreater than the 15% of the pumping unit cycle of operation, then selection scheme 3；
As only P 'dsmaxWhen≤0.3, and meet Δ TfLess than the 15% of the pumping unit cycle of operation, then selection scheme 2；
2) as only P 'fdmaxWhen≤0.3, then selection scheme 1；
3) as P 'dsmax、P′fdmaxWhen simultaneously≤0.3, as Δ TfGreater than the pumping unit cycle of operation 15% when, then selecting party
Case 3；
As Δ TfLess than the pumping unit cycle of operation 15% when, and P 'fdmax< P 'dsmaxWhen, then selection scheme 1；
As Δ TfLess than the pumping unit cycle of operation 15% when, and P 'fdmax> P 'dsmaxWhen, then selection scheme 2.
Embodiment one:
Attached drawing 2 show the load power curve that device of the present invention is calculated using the electrical quantity detected, right
The discrete power p (k) that load power curve is calculated shown in attached drawing 2 carries out multiple spot filtering, and it is bent to record filtered power
Line；Filtering type is as follows:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_FilterIt (i) is after multi-point average
Filtered power point, i, j, k=1,2,3...., power curve more smooth as shown in Fig. 3 is obtained after filtering；
The filtered power P being calculated_Filter(i) electronic decline region, power generation region and electronic rising area are marked off
The filtered power in domain, each region respectively indicates are as follows: pdx(i)、pfd(i)、pds(i)；
The minus continuum of filtered power is power generation region, and duration is Δ Tf；Filtered power is greater than
Zero continuum is electric zone, and the region that wherein filtered power continuously rises is electronic elevated areas, and filtered power is continuous
The region of decline is electronic decline region, and it is as shown in Fig. 4 that the filtered power that will test carries out region division；
As the duration Δ TfLess than pumping unit cycle of operation T 8% when, be not suitable for power-off energy saving control；When
The duration Δ TfGreater than pumping unit cycle of operation T 8% when, be suitble to using power-off energy saving control.Song shown in attached drawing 4
Power generation region duration Δ T in linef> 8%T；
The pfd(i)、pds(i) region carries out power variation rate analysis, and formula is as follows:
P′Filter(i)=| P_Filter(i+1)-P_Filter(i)|/P0(i=1,2,3...)
Wherein P0For motor rated power.
To P 'Filter(i) discrete function is maximized, and formula is as follows:
P′max=max (P 'Filter(i))
Curve p described in attached drawing 4 is calculated separately out by above-mentioned formulafd(i)、pds(i) the maximum power variation value in region
P′fdmax、P′dsmax, 5 know maximum power variation value P ' with reference to the accompanying drawingsfdmax、P′dsmaxSmaller than 0.3, and Δ Tf=37.5%T,
Meet and works as P 'dsmax、P′fdmaxWhen simultaneously≤0.3, as Δ TfGreater than the pumping unit cycle of operation 15% when, then selection scheme 3；When
ΔTfLess than the pumping unit cycle of operation 15% when, and P 'fdmax< P 'dsmaxWhen, then selection scheme 1；As Δ TfLess than pumping unit
The cycle of operation 15% when, and P 'fdmax> P 'dsmaxWhen, then selection scheme 2, corresponding power-off criterion；
Embodiment two:
Attached drawing 6 show the load power curve that device of the present invention is calculated using the electrical quantity detected, right
The discrete power p (k) that load power curve is calculated shown in attached drawing 6 carries out multiple spot filtering, and it is bent to record filtered power
Line；Filtering type is as follows:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_FilterIt (i) is after multi-point average
Filtered power point, i, j, k=1,2,3...., power curve more smooth as shown in Fig. 7 is obtained after the method filtering；
The filtered power P being calculated_Filter(i) electronic decline region, power generation region and electronic rising area are marked off
The filtered power in domain, each region respectively indicates are as follows: pdx(i)、pfd(i)、pds(i)；
The minus continuum of filtered power is power generation region, and duration is Δ Tf；Filtered power is greater than
Zero continuum is electric zone, and the region that wherein filtered power continuously rises is electronic elevated areas, and filtered power is continuous
The region of decline is electronic decline region, and it is as shown in Fig. 7 that the filtered power that will test carries out region division；
As the duration Δ TfLess than pumping unit cycle of operation T 8% when, be not suitable for power-off energy saving control；When
The duration Δ TfGreater than pumping unit cycle of operation T 8% when, be suitble to using power-off energy saving control, song shown in attached drawing 7
Power generation region duration Δ T in linef≤ 8%T is unsatisfactory for power-off criterion；
Embodiment three:
Attached drawing 8 show the load power curve that device of the present invention is calculated using the electrical quantity detected, right
Load power curve shown in attached drawing 8 carries out multiple spot filtering to the discrete power p (k) being calculated, and records filtered power
Curve；Filtering type is as follows:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_FilterIt (i) is after multi-point average
Filtered power point, i, j, k=1,2,3...., power curve more smooth as shown in Fig. 9 is obtained after the method filtering；
The filtered power P being calculated_Filter(i) electronic decline region, power generation region and electronic rising area are marked off
The filtered power in domain, each region respectively indicates are as follows: pdx(i)、pfd(i)、pds(i)；
The minus continuum of filtered power is power generation region, and duration is Δ Tf；Filtered power is greater than
Zero continuum is electric zone, and the region that wherein filtered power continuously rises is electronic elevated areas, and filtered power is continuous
The region of decline is electronic decline region, and it is as shown in Fig. 7 that the filtered power that will test carries out region division；
As the duration Δ TfLess than pumping unit cycle of operation T 8% when, be not suitable for power-off energy saving control；When
The duration Δ TfGreater than pumping unit cycle of operation T 8% when, be suitble to using power-off energy saving control, song shown in attached drawing 9
Power generation region duration Δ T in linef> 8%T；
P ' shown in 10 with reference to the accompanying drawingsdsmax> 0.3 and P 'fdmax< 0.3 meets as only P 'dsmaxWhen≤0.3, and meet Δ
TfGreater than the 15% of the pumping unit cycle of operation, then selection scheme 3；
As only P 'dsmaxWhen≤0.3, and meet Δ TfLess than the 15% of the pumping unit cycle of operation, then selection scheme 2 pair
The power-off criterion answered.
Finally it is noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, the essence for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution
Mind and range.
Claims (5)
1. a kind of method for whether using discontinuous power supply for judging motor of oil extractor, it is characterised in that: utilize what is measured
Motor operation electrical quantity, the discrete power of motor operation course obtained by calculation is filtered, multidomain treat-ment, analyzes power
Variation Features judge when electric motor driven cycle potential energy loads if appropriate for using discontinuous power supply Energy Saving Control；
Multiple spot filtering is carried out to the discrete power p (k) being calculated, and records filtered power curve；Filtering type is such as
Under:
In above formula, p (k) is the discrete power point calculated in real time, j0It is filtering number, P_Filter(i) it is filtering after multi-point average
Power points, i, j, k=1,2,3 ...；
The filtered power P being calculated_Filter(i) electronic decline region, power generation region and electronic elevated areas are marked off, respectively
The filtered power in region respectively indicates are as follows: pdx(i)、pfd(i)、pds(i)；
The minus continuum of filtered power is power generation region, and duration is Δ Tf；Filtered power is greater than zero company
Continuous region is electric zone, and the region that wherein filtered power continuously rises is electronic elevated areas, what filtered power continuously declined
Region is electronic decline region；
As the duration Δ TfLess than pumping unit cycle of operation T 8% when, be not suitable for power-off energy saving control；It is held when described
Continuous time Δ TfGreater than pumping unit cycle of operation T 8% when, be suitble to using power-off energy saving control.
2. according to a kind of its method for whether using discontinuous power supply for judging motor of oil extractor described in claim 1,
It is characterized in that: the pfd(i)、pds(i) region carries out power variation rate analysis, and formula is as follows:
P′Filter(i)=| P_Filter(i+1)-P_Filter(i)|/P0(i=1,2,3...)
Wherein P0For motor rated power；
To P 'Filter(i) discrete function is maximized, and formula is as follows:
P′max=max (P 'Filter(i))
P is calculated separately out by above-mentioned formulafd(i)、pds(i) the maximum power variation value P ' in regionfdmax、P′dsmax。
3. according to a kind of its method for whether using discontinuous power supply for judging motor of oil extractor as stated in claim 2,
It is characterized by: working as P 'fdmax、P′dsmaxIn at least one value be less than or equal to 0.3 when, then meet discontinuous power supply control require,
Carry out power-off program analysis；Such as P 'fdmax、P′dsmaxWhen all greater than 0.3, then it is unsatisfactory for discontinuous power supply control and requires.
4. a kind of method for whether using discontinuous power supply for judging motor of oil extractor according to its claim 3,
It is characterized by: being divided into three kinds of discontinuous power supply control programs according to power-off is different with power supply Input area；
Scheme 1: decline region P in the power of electronic operating conditiondx(i) it runs slowly after powering off to power generation region Pfd(i), Accelerating running
Power supply is put into when to synchronizing speed；
Scheme 2: in power generation region Pfd(i) Accelerating running is to electronic elevated areas P after powering offds(i), it runs slowly to synchronizing speed
When put into power supply；
Scheme 3: in electronic decline region Pdx(i) decelerating through motor is run after powering off, by power generation region Pfd(i) after Accelerating running
Electronic elevated areas Pds(i) power supply is put into when being decelerated to synchronizing speed.
5. a kind of method for whether using discontinuous power supply for judging motor of oil extractor according to its claim 4,
It is characterized by:
1) as only P 'dsmaxWhen≤0.3, and meet Δ TfGreater than the 15% of the pumping unit cycle of operation, then selection scheme 3；
As only P 'dsmaxWhen≤0.3, and meet Δ TfLess than the 15% of the pumping unit cycle of operation, then selection scheme 2；
2) as only P 'fdmaxWhen≤0.3, then selection scheme 1；
3) as P 'dsmax、P′fdmaxWhen simultaneously≤0.3, as Δ TfGreater than the pumping unit cycle of operation 15% when, then selection scheme 3；
As Δ TfLess than the pumping unit cycle of operation 15% when, and P 'fdmax< P 'dsmaxWhen, then selection scheme 1；
As Δ TfLess than the pumping unit cycle of operation 15% when, and P 'fdmax> P 'dsmaxWhen, then selection scheme 2.
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| CN106199425A CN106199425A (en) | 2016-12-07 |
| CN106199425B true CN106199425B (en) | 2019-02-05 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1688099A (en) * | 2005-04-30 | 2005-10-26 | 华北电力大学（北京） | Discontinuous power supply full-automatic controlling method and apparatus for motor of beam-pumping unit |
| CN1688100A (en) * | 2005-04-30 | 2005-10-26 | 华北电力大学（北京） | Controlling method and apparatus of discontinuous power supply combined with star angle converting for motor of pumping unit |
| CN2785255Y (en) * | 2005-04-30 | 2006-05-31 | 华北电力大学（北京） | Beam type oil extractor motor discontinuous electricity supply full-automatic control device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7088073B2 (en) * | 2003-01-24 | 2006-08-08 | Toshiba Internationl Corporation | Inverter drive system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1688099A (en) * | 2005-04-30 | 2005-10-26 | 华北电力大学（北京） | Discontinuous power supply full-automatic controlling method and apparatus for motor of beam-pumping unit |
| CN1688100A (en) * | 2005-04-30 | 2005-10-26 | 华北电力大学（北京） | Controlling method and apparatus of discontinuous power supply combined with star angle converting for motor of pumping unit |
| CN2785255Y (en) * | 2005-04-30 | 2006-05-31 | 华北电力大学（北京） | Beam type oil extractor motor discontinuous electricity supply full-automatic control device |
Non-Patent Citations (2)
| Title |
|---|
| A Multifunction Energy-Saving Device With a Novel Power-Off Control Strategy for Beam Pumping Motors;罗应力;《IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS》;20110419;第47卷(第四期);全文 |
| 笼型异步电机在发电和电动工况下的损耗和无功特性研究;牟树贞等;《电机与控制应用》;20120310(第3期);全文 |
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| CN106199425A (en) | 2016-12-07 |
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