CN104362933A - Offshore platform oil extraction electric submersible pump variable frequency driving system - Google Patents
Offshore platform oil extraction electric submersible pump variable frequency driving system Download PDFInfo
- Publication number
- CN104362933A CN104362933A CN201410645987.2A CN201410645987A CN104362933A CN 104362933 A CN104362933 A CN 104362933A CN 201410645987 A CN201410645987 A CN 201410645987A CN 104362933 A CN104362933 A CN 104362933A
- Authority
- CN
- China
- Prior art keywords
- offshore platform
- submersible pump
- electric submersible
- bus
- parallel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/74—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more ac dynamo-electric motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2201/00—Indexing scheme relating to controlling arrangements characterised by the converter used
- H02P2201/01—AC-AC converter stage controlled to provide a defined AC voltage
Abstract
The invention provides an offshore platform oil extraction electric submersible pump variable frequency driving system. The system is characterized by comprising two or more offshore platform generators, one or more frequency converter phase shift rectification units, two common direct current buses arranged in parallel in a spaced mode, multiple inverters and electric submersible pump motors with the number equal to that of the inverters; each offshore platform generator is connected with the input end of the corresponding frequency converter phase shift rectification unit through an alternating current bus, the output end of each frequency converter phase shift rectification unit is connected with the two common direct current buses in parallel, the two common direct current buses are connected with the input end of each inverter in parallel, and the output end of each inverter is connected with the corresponding electric submersible pump motor. The offshore platform oil extraction electric submersible pump variable frequency driving system can be widely applied to the offshore platform oil extraction process.
Description
Technical field
The present invention relates to a kind of electric submersible pump frequency changing driving system, particularly about a kind of offshore platform electric immersible pump for oil extraction frequency changing driving system.
Background technology
First the electric energy that platform generator on offshore oil platform sends drops to after 400V through step-down transformer, be input in frequency converter, change to required supply frequency through frequency converter, be input to step-up transformer, after voltage is risen to required voltage, by oil-submersible cable, electric energy is defeated by electric submersible pump motor, electric submersible pump motor converts electrical energy into mechanical energy, and drive oil-submersible centrifugal pump High Rotation Speed, in well, liquid is inhaled in pump, by impeller of pump supercharging gradually, flow to ground through oil pipe.In electric submersible pumping system, by the application of frequency converter, frequency conversion soft start can be realized on the one hand, protection electric submersible pump motor; Can change according to oilwell parameter on the other hand, change frequency converter output frequency, regulate oil well output, the work efficiency of electric submersible pump can be improved simultaneously.
As shown in Figure 1, current offshore platform electric immersible pump for oil extraction frequency changing driving system be the electric energy that sends of offshore platform generator 11 first after step-down transformer 12 respectively through inlet wire filter 13, rectifier 14, work through the corresponding electric submersible pump motor 17 of step-up transformer 16 rear drive again after inverter 15, but there is following problem in said system: 1) because offshore platform well head quantity is more, first the electric energy needed for electric submersible pump motor 17 that each well head is corresponding to need after the step-down of a step-down transformer 12 to boost through an independent step-up transformer 16 again, multiple transformer occupies very large space on platform.In addition, electric energy is through multi-stage transformation, and the efficiency of Energy harvesting is lower; 2) electric submersible pump motor 17 that each well head is corresponding configures a passive filter and frequency converter separately, occupy very large space, and the passive filter harmonic filtration weak effect of configuration, the quality of power supply of electric submersible pump frequency converter input side harmonic wave on platform causes impact; 3) due to the particularity of offshore oil industry, the frequency converter selected leaves larger allowance, often there is " low load with strong power " phenomenon during frequency converter actual motion, cause the passive filter configured generally to cause idle overcompensation phenomenon to frequency converter input side low-pressure system.
Summary of the invention
For the problems referred to above, the object of this invention is to provide the offshore platform electric immersible pump for oil extraction frequency changing driving system that a kind of energy utilization efficiency is high, take up room little.
For achieving the above object, the present invention takes following technical scheme: a kind of offshore platform electric immersible pump for oil extraction frequency changing driving system, is characterized in that: it comprises plural offshore platform generator, more than one frequency converter phase-shifting commutation unit, the common DC bus of two spaced and parallel settings, some inverters and the electric submersible pump motor identical with described inverter quantity; Offshore platform generator described in each connects the input of frequency converter phase-shifting commutation unit described in each by an ac bus, described in each, the output of frequency converter phase-shifting commutation unit is connected in parallel two described common DC bus, article two, described common DC bus is connected in parallel the input of inverter described in each, and the output of inverter described in each connects electric submersible pump motor described in each respectively.
Described in each, frequency converter phase-shifting commutation unit comprises a phase shift step-down transformer and plural rectifier, the input of described phase shift step-down transformer connects described ac bus, the output of described phase shift step-down transformer is connected in parallel the output of rectifier described in each, and described in each, the output of rectifier is connected in parallel two described common DC bus.
The present invention is owing to taking above technical scheme, it has the following advantages: 1, the present invention includes offshore platform generator, frequency converter phase-shifting commutation unit, common DC bus, inverter and electric submersible pump motor, frequency converter phase-shifting commutation unit includes phase shift step-down transformer and rectifier, wherein, the output of phase shift step-down transformer is connected in parallel the output of rectifier, the output of rectifier is connected in parallel two common DC bus, therefore the present invention by common DC bus mode carry out rectifier share, achieve rectifier allowance to share, decrease the total capacity requirement of rectifier, decrease taking up room of rectifier simultaneously, effectively reduce equipment cost.2, compared with existing offshore platform electric immersible pump for oil extraction frequency changing driving system, the present invention is without the need to additional other filter, therefore avoid the idle overcompensation problem that filter in traditional frequency conversion supply power mode brings, decrease working platform personnel operation maintenance work; Meanwhile, the present invention is boosted without the need to step-up transformer, and the utilization ratio that improve energy saves large quantity space and cost simultaneously.The present invention is little, reliable on the impact of the offshore oil platform quality of power supply, safeguards simple, can be widely used in offshore platform oil recovery process.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, detailed description is carried out to the present invention.But should be appreciated that being provided only of accompanying drawing understands the present invention better, they not should be understood to limitation of the present invention.
Fig. 1 is the offshore platform electric immersible pump for oil extraction electric power system single line schematic diagram of prior art;
Fig. 2 is offshore platform electric immersible pump for oil extraction electric power system line chart of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail.
As shown in Figure 2, offshore platform electric immersible pump for oil extraction frequency changing driving system of the present invention comprises plural offshore platform generator 21, the common DC bus 23 of more than one frequency converter (VFD) phase-shifting commutation unit 22, two spaced and parallel settings, some inverters 24 and the electric submersible pump motor 25 identical with inverter 24 quantity; Wherein, each frequency converter phase-shifting commutation unit 22 comprises a phase shift step-down transformer 221 and plural rectifier 222; All offshore platform generators 21 connect the input moving each phase shift step-down transformer 221 by an ac bus 26, the output of each phase shift step-down transformer 221 is connected in parallel the output of each rectifier 222, the output of each rectifier 222 is connected in parallel two common DC bus 23, article two, common DC bus 23 is connected in parallel the input of each inverter 24, and the output of each inverter 24 connects each electric submersible pump motor 25 respectively.
In a preferred embodiment, the quantity that the number of frequency converter phase-shifting commutation unit 22 carries out the electric submersible pump motor 25 driven required for reality is determined, does not limit at this.
In a preferred embodiment, in order to improve the reliability of system, ac bus 26 can adopt in some sections presses ac bus to be formed by connecting, and wherein, often switch can be adopted to connect between adjacent two sections of ac bus.
In a preferred embodiment, in order to improve the reliability of system, each common DC bus 23 can adopt some sections of DC buss to be formed by connecting, and wherein, often switch can be adopted to connect between adjacent two sections of DC buss.
When the present invention uses, the electric energy that offshore platform generator 21 sends is sent to phase shift step-down transformer 221 by ac bus 26, be sent to rectifier 222 after carrying out multiple phase shift after first alternating voltage is depressured to suitable voltage by phase shift step-down transformer 221 and carry out rectification, the both positive and negative polarity of the DC power supply of output is connected in parallel two common DC bus 23 and is used for powering to each inverter 24 by rectifier 222, each inverter 24 will be transported in each oil well by oil-submersible cable after the alternating current of direct current changing voltage and frequency-adjustable, and the electric submersible pump motor 25 in each well is driven, electric submersible pump motor 25 drives oil-submersible centrifugal pump High Rotation Speed, in well, liquid is inhaled in pump, by impeller of pump supercharging gradually, ground is flow to through oil pipe.
The various embodiments described above are only for illustration of the present invention; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (2)
1. an offshore platform electric immersible pump for oil extraction frequency changing driving system, is characterized in that: it comprises plural offshore platform generator, more than one frequency converter phase-shifting commutation unit, the common DC bus of two spaced and parallel settings, some inverters and the electric submersible pump motor identical with described inverter quantity; Offshore platform generator described in each connects the input of frequency converter phase-shifting commutation unit described in each by an ac bus, described in each, the output of frequency converter phase-shifting commutation unit is connected in parallel two described common DC bus, article two, described common DC bus is connected in parallel the input of inverter described in each, and the output of inverter described in each connects electric submersible pump motor described in each respectively.
2. a kind of offshore platform electric immersible pump for oil extraction frequency changing driving system as claimed in claim 1, it is characterized in that: described in each, frequency converter phase-shifting commutation unit comprises a phase shift step-down transformer and plural rectifier, the input of described phase shift step-down transformer connects described ac bus, the output of described phase shift step-down transformer is connected in parallel the output of rectifier described in each, and described in each, the output of rectifier is connected in parallel two described common DC bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645987.2A CN104362933A (en) | 2014-11-14 | 2014-11-14 | Offshore platform oil extraction electric submersible pump variable frequency driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645987.2A CN104362933A (en) | 2014-11-14 | 2014-11-14 | Offshore platform oil extraction electric submersible pump variable frequency driving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104362933A true CN104362933A (en) | 2015-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410645987.2A Pending CN104362933A (en) | 2014-11-14 | 2014-11-14 | Offshore platform oil extraction electric submersible pump variable frequency driving system |
Country Status (1)
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| CN (1) | CN104362933A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768148A (en) * | 2018-06-16 | 2018-11-06 | 福建华宏天城机电设备有限公司 | A kind of submersible motor power conditioner |
| CN110112730A (en) * | 2019-05-15 | 2019-08-09 | 全球能源互联网研究院有限公司 | A kind of transmission system |
| CN112803417A (en) * | 2021-04-06 | 2021-05-14 | 全球能源互联网研究院有限公司 | Power transmission system |
-
2014
- 2014-11-14 CN CN201410645987.2A patent/CN104362933A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768148A (en) * | 2018-06-16 | 2018-11-06 | 福建华宏天城机电设备有限公司 | A kind of submersible motor power conditioner |
| CN110112730A (en) * | 2019-05-15 | 2019-08-09 | 全球能源互联网研究院有限公司 | A kind of transmission system |
| CN112803417A (en) * | 2021-04-06 | 2021-05-14 | 全球能源互联网研究院有限公司 | Power transmission system |
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| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150218 |
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| RJ01 | Rejection of invention patent application after publication |