CN102801335A - Thickened oil electric thermal recovery heating power supply - Google Patents
Thickened oil electric thermal recovery heating power supply Download PDFInfo
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- CN102801335A CN102801335A CN2012102931422A CN201210293142A CN102801335A CN 102801335 A CN102801335 A CN 102801335A CN 2012102931422 A CN2012102931422 A CN 2012102931422A CN 201210293142 A CN201210293142 A CN 201210293142A CN 102801335 A CN102801335 A CN 102801335A
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Abstract
The invention discloses a thickened oil electric thermal recovery heating power supply, and belongs to the technical field of power supplies. The thickened oil electric thermal recovery heating power supply comprises a rectifier module, an inverter module, a single chip computer, a digital signal processor (DSP), a driving module, an isolation transformer, a man machine interface module and the like. A filtered direct current is converted into a single-phase alternating current through the inverter module to be output to the isolation transformer so as not to cause the unbalancing of a three-phase power network. Due to the adoption of a double-CPU structure of the DSP and the single chip computer, the sinusoidal pulse width modulation (SPWM) operation can be implemented fast and communication with a plurality of interface units can also be implemented, so that the control circuit is further simplified and the internal fault rate of the heating power supply is lowered. Due to the adoption of the amorphous alloy annular iron-cored isolation transformer, the medium-high frequency response characteristic is ideal and the self consumption is small.
Description
Technical field
The present invention relates to a kind of power supply, particularly relate to a kind of viscous crude electric heating and adopt heating power supply.
Background technology
Viscous crude occupies suitable ratio in China's underground petroleum storage; Especially ratio is higher in the western oil field of Liaohe Oil Field of China and exploitation in recent years; Its feature is that viscosity is big, solidifying point is high, flowability is poor, is difficult to conventional method exploitation and collection defeated under normal conditions.Through research for many years, the viscous crude acquisition technique can be divided into chemical method, physical method and biological method three major types both at home and abroad.The former environmental pollution problem is difficult to solve, and the latter does not reach the commercial Application level as yet, and it is thick that viscous crude collection at present mainly adopts physical method to fall, and except that adding dilution viscosity reductions such as diesel oil or kerosene, having implemented commercial Application and having truly had the physical method of effect is thermal recovery.
It is the wherein a kind of of heavy crude heat extraction that electric heating is adopted, and the electric heating device for picking is made up of four major parts usually: special-purpose heating power supply, hollow rod, hollow oil well pump and heating cable.Be to utilize special-purpose heating power supply that hollow rod and oil pumper integral body are heated as a load in early days; So both solved viscous crude in the last problem of taking out in the lifting process condensation again and blocking oil pipe; Realized uninterrupted oil recovery continuously again, this is a much progress of heavy crude heat extraction technology.
Heating power supply is the core that viscous crude electric heating is adopted technique device.At present, it is very simple and easy that a lot of electric heating are adopted the well head power supply, and single-phase isolating transformer is just directly supplied power in pit shaft after the middle piezoelectricity of oilfield electric net become required low tension.Obviously the output of isolating transformer is fixed, and pressure regulation flexibly more can not frequency modulation, also can't require the realization closed-loop control according to wellhead temperature.This extensive Electric heating utilization rate of electrical is lower, and power factor is low, and causes three phase network seriously uneven.
In view of this, the inventor studies this, develops a kind of viscous crude electric heating specially and adopts heating power supply, and this case produces thus.
Summary of the invention
But the purpose of this invention is to provide a kind of flexible output voltage size and frequency, utilization rate of electrical height and can not disturb the viscous crude electric heating of three phase network to adopt heating power supply.
To achieve these goals, solution of the present invention is:
A kind of viscous crude electric heating is adopted heating power supply, comprises rectification module, inversion module, single-chip microcomputer, DSP, driver module, isolating transformer and human-machine interface module etc.The input of rectification module connects three-phase alternating current, and output connects the input of inversion module, and the output of inversion module connects isolating transformer; The output of driver module connects inversion module, and input connects DSP, and DSP is connected with single-chip microcomputer is two-way, and human-machine interface module is connected with single-chip microcomputer is two-way; Said isolating transformer adopts amorphous alloy toroidal core and high withstand voltage big electric current winding.
Also be parallel with a filter capacitor between rectification module and the inversion module, the negative pole of rectification module and filter capacitor is in series with a current-limiting resistance, is parallel with a relay in the both sides of current-limiting resistance.The effect of current-limiting resistance is the charging current of restriction powered on moment to filter capacitor, the protection rectification circuit, and after the filter capacitor charging finishes, the relay adhesive, the current-limiting resistance short circuit is no longer worked.
Said DSP selects the dsp chip of Electric Machine Control class for use, and it is the dsp chip of ADMCF328 that the present invention selects ADI company model for use.
Said inversion module adopts sinusoid pulse width modulation modulation (SPWM) technology to carry out inversion, selects the IGBT module for use, and four IGBT modules are formed a single-phase full bridge inverter circuit.
Single-chip microcomputer is used for human-machine interface module, communication and the control of various I/O interface.
Become direct current behind the three-phase alternating current process rectification module rectifying and wave-filtering,, effectively improve the power factor of power supply, reduce interference electrical network again through excessive capacity filter capacitor.Filtered direct current outputs to isolating transformer through becoming single-phase alternating current behind the inversion module, so just can not cause three phase network uneven, again through the no-load voltage ratio of isolating transformer, can output voltage be brought up to the upper limit of need of load.
Modulating frequency through DSP and driver module control inversion module makes the voltage and the frequency that output to isolating transformer adjustable arbitrarily, is convenient to realize optimum Match according to different well depths and load parameter; DSP utilizes the high-speed computation ability of DSP and inner special instruction and the algorithm that is used for inversion control thereof to realize high speed SPWM technology as the inversion main control chip.Two-way connection DSP of single-chip microcomputer and human-machine interface module, control man-machine interface, communication and various I/O interface, digital intelligent interface are easy to realize temperature closed loop control and network monitoring.The present invention adopts DSP and double CPU of microcomputer structure, can Rapid Realization SPWM computing, can carry out communication with a plurality of interface units again, and control circuit is further simplified, reduce the inner failure rate of said heating power supply.
Adopt the isolating transformer of amorphous alloy toroidal core, the medium-high frequency response characteristic is desirable, and own loss is little, is particularly suitable for the intermediate frequency transformation, and intermediate frequency output can produce good kelvin effect on calandria, and electric conversion efficiency is higher.
Below in conjunction with accompanying drawing and specific embodiment the present invention is done and to describe in further detail.
Description of drawings
Fig. 1 adopts the control principle figure of heating power supply for the viscous crude electric heating of present embodiment.
Embodiment
A kind of viscous crude electric heating is adopted heating power supply, comprises rectification module 1, inversion module 2, isolating transformer 3, driver module 4, DSP5, single-chip microcomputer 6 and human-machine interface module 7 etc.The input of rectification module 1 connects three-phase alternating current, and output connects the input of inversion module 2, and the output of inversion module 2 connects isolating transformer; The output of driver module 4 connects inversion module 2, and input connects DSP5, DSP5 and 6 two-way connections of single-chip microcomputer, human-machine interface module 7 and 6 two-way connections of single-chip microcomputer; Said isolating transformer 3 adopts amorphous alloy toroidal core and high withstand voltage big electric current winding.
Also be parallel with a filter capacitor C between rectification module 1 and the inversion module 2, rectification module 1 is in series with a current-limiting resistance R with the negative pole of filter capacitor C, is parallel with a relay K in the both sides of current-limiting resistance R.The effect of current-limiting resistance R is the charging current of restriction powered on moment to filter capacitor C, the protection rectification circuit, and after filter capacitor C charging finishes, the relay K adhesive, current-limiting resistance R short circuit is no longer worked.
Said DSP5 selects the dsp chip of Electric Machine Control class for use, and it is the dsp chip of ADMCF328 that the present invention selects ADI company model for use.
Said inversion module 2 adopts sinusoid pulse width modulation modulation (SPWM) technology to carry out inversion, selects the IGBT module for use, and four IGBT modules are formed a single-phase full bridge inverter circuit.
Single-chip microcomputer 6 is used for human-machine interface module 7, communication and the control of various I/O interface.
Become direct current behind three-phase alternating current process rectification module 1 rectifying and wave-filtering,, effectively improve the power factor of power supply, reduce interference electrical network again through excessive capacity filter capacitor C.Filtered direct current outputs to isolating transformer 3 through becoming single-phase alternating current behind the inversion module 2, so just can not cause three phase network uneven, again through the no-load voltage ratio of isolating transformer 3, can output voltage be brought up to the upper limit of need of load.
Modulating frequency through DSP5 and driver module 4 control inversion modules 2 makes the voltage and the frequency that output to isolating transformer 3 adjustable arbitrarily, is convenient to realize optimum Match according to different well depths and load parameter; DSP5 utilizes the high-speed computation ability of DSP5 and inner special instruction and the algorithm that is used for inversion control thereof to realize high speed SPWM technology as the inversion main control chip.Single-chip microcomputer 6 two-way connection DSP5 and human-machine interface modules 7, control man-machine interface, communication and various I/O interface, digital intelligent interface are easy to realize temperature closed loop control and network monitoring.Present embodiment adopts DSP5 and single-chip microcomputer 6 dual-cpu structures, can Rapid Realization SPWM computing, can carry out communication with a plurality of interface units again, and control circuit is further simplified, reduce the failure rate of said heating power supply inside.
Adopt the isolating transformer 7 of amorphous alloy toroidal core, the medium-high frequency response characteristic is desirable, and own loss is little, is particularly suitable for the intermediate frequency transformation, and intermediate frequency output can produce good kelvin effect on calandria, and electric conversion efficiency is higher.
The foregoing description and graphic and non-limiting product form of the present invention and style, the those of ordinary skill of any affiliated technical field all should be regarded as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (6)
1. a viscous crude electric heating is adopted heating power supply, it is characterized in that: comprise rectification module, inversion module, single-chip microcomputer, DSP, driver module, isolating transformer and human-machine interface module; The input of rectification module connects three-phase alternating current, and output connects the input of inversion module, and the output of inversion module connects isolating transformer; The output of driver module connects inversion module, and input connects DSP, and DSP is connected with single-chip microcomputer is two-way, and human-machine interface module is connected with single-chip microcomputer is two-way; Said isolating transformer adopts amorphous alloy toroidal core and high withstand voltage big electric current winding.
2. a kind of viscous crude electric heating as claimed in claim 1 is adopted heating power supply; It is characterized in that: also be parallel with a filter capacitor between said rectification module and the inversion module; The negative pole of rectification module and filter capacitor is in series with a current-limiting resistance, is parallel with a relay in the both sides of current-limiting resistance.
3. a kind of viscous crude electric heating as claimed in claim 1 is adopted heating power supply, and it is characterized in that: said DSP selects the dsp chip of Electric Machine Control class for use.
4. a kind of viscous crude electric heating as claimed in claim 3 is adopted heating power supply, it is characterized in that: it is the dsp chip of ADMCF328 that said DSP selects ADI company model for use.
5. a kind of viscous crude electric heating as claimed in claim 1 is adopted heating power supply, it is characterized in that: said inversion module adopts sine pulse midth modification to carry out inversion.
6. a kind of viscous crude electric heating as claimed in claim 5 is adopted heating power supply, and it is characterized in that: said inversion module is selected the IGBT module for use, and four IGBT modules are formed a single-phase full bridge inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102931422A CN102801335A (en) | 2012-08-17 | 2012-08-17 | Thickened oil electric thermal recovery heating power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102931422A CN102801335A (en) | 2012-08-17 | 2012-08-17 | Thickened oil electric thermal recovery heating power supply |
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| CN102801335A true CN102801335A (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012102931422A Pending CN102801335A (en) | 2012-08-17 | 2012-08-17 | Thickened oil electric thermal recovery heating power supply |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1855692A (en) * | 2005-04-25 | 2006-11-01 | 张新华 | High speed sine pulse midth modification |
| JP2009207282A (en) * | 2008-02-28 | 2009-09-10 | Hitachi Ltd | Power supply circuit, and motor drive unit and air conditioner using the same |
| CN202721613U (en) * | 2012-08-17 | 2013-02-06 | 绍兴文理学院 | Heavy-oil electrothermal recovery heating power supply |
-
2012
- 2012-08-17 CN CN2012102931422A patent/CN102801335A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1855692A (en) * | 2005-04-25 | 2006-11-01 | 张新华 | High speed sine pulse midth modification |
| JP2009207282A (en) * | 2008-02-28 | 2009-09-10 | Hitachi Ltd | Power supply circuit, and motor drive unit and air conditioner using the same |
| CN202721613U (en) * | 2012-08-17 | 2013-02-06 | 绍兴文理学院 | Heavy-oil electrothermal recovery heating power supply |
Non-Patent Citations (1)
| Title |
|---|
| 李文江等: "采油油管变频加热电源的设计研究", 《仪器仪表用户》, vol. 4, no. 3, 30 June 2007 (2007-06-30), pages 130 - 131 * |
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Application publication date: 20121128 |