CN204065899U - A kind of intelligent heating oil well two close cycles intermediate frequency power supply - Google Patents
A kind of intelligent heating oil well two close cycles intermediate frequency power supply Download PDFInfo
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- CN204065899U CN204065899U CN201420416105.0U CN201420416105U CN204065899U CN 204065899 U CN204065899 U CN 204065899U CN 201420416105 U CN201420416105 U CN 201420416105U CN 204065899 U CN204065899 U CN 204065899U
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Abstract
The utility model belongs to field of power supplies, particularly relates to a kind of for the intelligent heating oil well two close cycles intermediate frequency power supply in oil exploitation.This power supply comprises the intermediate-frequency circuit controlling oil well hollow sucker rod heating, intermediate-frequency circuit comprises uncontrollable rectifier unit, inversion unit and I.F.T., by uncontrollable rectifier unit access common frequency power network, also comprise: set temperature sampling unit gathers real time temperature to oil well hollow sucker rod; Integral controller is set, this integral controller, for receive temperature sampling unit and with its in arrange compare to fixed temperature, driver element is set, accept the difference signal of integral controller and be converted to pulse-length modulation, for regulating the size of inversion unit output power in intermediate-frequency circuit, when realizing sample temperature decline, heating power can automatically, linear increment in real time, finally reach the state of the relatively stable operation of system.
Description
Technical field
The utility model belongs to field of power supplies, particularly relates to a kind of for the intelligent heating oil well two close cycles intermediate frequency power supply in oil exploitation.
Background technology
Also at the common intermediate frequency power supply used or power frequency supply device in current oil field, it is without temperature closed loop system, but artificial providing performance number to heating oil well, this value gropes to get from experience, makes in operation following period of time, it is bigger than normal or less than normal that device can not show power, waste energy is just caused if bigger than normal, if the heat time less than normal lengthens, production fluid inefficiency, this running status is the sense of responsibility and the working attitude that depend on operating personnel, can not automatically control.Crude oil has a best temperature exploitation point, if intermediate frequency power supply can fast, stably keep oil temperature on the best exploitation point, then the overall target of energy-saving effect and production efficiency will be in best situation.
Utility model content
For above shortcomings part in prior art, technical problem to be solved in the utility model is to provide a kind of intelligent heating oil well two close cycles intermediate frequency power supply realizing the closed-loop control of wellhead temperature.
The utility model is achieved in that
A kind of intelligent heating oil well two close cycles intermediate frequency power supply, comprise the intermediate-frequency circuit controlling oil well hollow sucker rod heating, intermediate-frequency circuit comprises uncontrollable rectifier unit, inversion unit and I.F.T., by uncontrollable rectifier unit access common frequency power network, also comprises:
Set temperature sampling unit gathers real time temperature to oil well hollow sucker rod;
Arrange integral controller, integral controller is used for employing temperature and compares to fixed temperature;
Driver element is set, accept the comparative result of integral controller and be converted to pulse-length modulation, for regulating the size of inversion unit output power in intermediate-frequency circuit, when realizing sample temperature decline, heating power can automatically, linear increment in real time, finally reach the state of the relatively stable operation of system.
Further, soft start unit is set between uncontrollable rectifier unit and inversion unit, soft start unit is connected with integral controller, three-phase alternating current is through uncontrollable rectifier unit, be rectified into DC voltage, by charging to filter capacitor after the resistance current limliting in soft start unit, after a period of time time delay, by integral controller output pulse signal, ohmically control machines conducting will be connected in parallel in soft start unit, namely excise charging current limiter resistance, after DC voltage reaches certain value, inversion unit is just started working.
Further, integral controller in integral controller sends comparison signal and produces phase-shifted control signal by driver element, the inversion unit conducting that control is made up of IGBT power device and shutoff, after inversion unit has output voltage, after I.F.T. is isolated and boosted, receive on hollow sucker rod, hold with or without electrification at I.F.T. outgoing side string, realize resonance with inductive load, make the output efficiency of device the highest.
Further, inversion unit adopts single-phase full control inverter bridge, and combined by two half-bridge circuits, load is connected across between the output terminal of two half-bridges.
Further; this intermediate frequency power supply is provided with power samples unit at the output terminal of I.F.T.; this power samples unit with compare integral controller and be connected; the electric current of load-side will be taken from; the current signal of load-side is delivered to integral controller equally; integral controller carries out the control of protectiveness to output current according to current signal simultaneously, prevents the appearance of excess current.
Further, this intermediate frequency power supply arranges voltage sampling unit at the input end of uncontrollable rectifier unit, this voltage sampling unit signal is connected with integral controller, is delivered to by voltage signal and compares integral controller, reaches match with the interface voltage of integral controller through overcommutation, voltage stabilizing; Integral controller carries out the control of protectiveness to input voltage according to voltage sampling signal simultaneously, prevents superpotential appearance.
Further, draw spare interface by two wires in the DC link of this intermediate-frequency circuit, organic combination can be done with the RHVC of this pumping unit of well.
The beneficial effects of the utility model are:
The utility model under the prerequisite of proof load safety, realize the closed-loop control of wellhead temperature, with occur be load closed loop, this just can control electrically heated power be in always meet production least energy output state;
The utility model adopts technology of frequency tracking that inversion unit can be made to always work in the nearly resonant condition of load, makes power obtain maximal value.
The utility model when detected temperatures and set-point temperature difference comparsion large time, particularly in the stage of driving a well, need fast PID control be carried out, at this moment adopt integral controller, just can have larger power stage, to improve the response speed of system; When temperature gap is smaller, also by constantly revising adjustment parameter, finally can accomplish stable output, preventing system toning state to occur.
Accompanying drawing explanation
Fig. 1 is the device structure block diagram that the utility model embodiment provides;
Fig. 2 is the control principle block diagram of the integral controller that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
As shown in Figure 1, a kind of intelligent heating oil well two close cycles intermediate frequency power supply, comprise the intermediate-frequency circuit controlling oil well hollow sucker rod heating, intermediate-frequency circuit comprises uncontrollable rectifier unit 1, inversion unit 2 and I.F.T. 13, access common frequency power network by uncontrollable rectifier unit 1, also comprise:
Set temperature sampling unit 8 pairs of oil well hollow sucker rods 4 gather real time temperature;
Integral controller 6 is set, this integral controller 6 for receive temperature sampling unit 8 and with its in arrange compare to fixed temperature;
Driver element 5 is set, accept the difference signal of integral controller 6 and be converted to pulse-length modulation, for regulating the size of inversion unit 2 output power in intermediate-frequency circuit, when realizing sample temperature decline, heating power can automatically, linear increment in real time, finally reach the state of the relatively stable operation of system.
Soft start unit 3 is set between uncontrollable rectifier unit 1 and inversion unit 2, soft start unit 3 is connected with integral controller 6 signal wire, three-phase alternating current is through uncontrollable rectifier unit 1, be rectified into DC voltage, by charging to filter capacitor after the resistance current limliting in soft start unit 3, after a period of time time delay, by the microprocessor output pulse signal in integral controller 6, ohmically control machines conducting will be connected in parallel in soft start unit 3, namely charging current limiter resistance is excised, after DC voltage reaches certain value, inversion unit 2 is just started working.Microprocessor in integral controller 6 sends signal with natural frequency and produces phase-shifted control signal by driver element 5, inversion unit 2 conducting that control is made up of IGBT power device and shutoff, after inversion unit 2 has output voltage, after I.F.T. 13 is isolated and is boosted, receive on hollow sucker rod 4, hold with or without electrification at I.F.T. 13 outgoing side string, realize resonance with inductive load, make the output efficiency of device the highest.
In the present embodiment integral controller 6 for by employing temperature with compare to fixed temperature, signal is delivered to driver element through PID arithmetic by difference.
As shown in Figure 2, integral controller control principle block diagram is as follows:
This integral controller extracts the major parameter 26 of controlled device by the controlled device 27 of input, finally 22 are determined to pid parameter, input to definite value R (t), and setup control deviation E (t), controlled quentity controlled variable U (t) is determined after the temperature difference of systems axiol-ogy being in the different temperature difference stage and judging, the control of output quantity is carried out by the real output value Y (t) of PWM regulating power 25 pairs of controlled devices, judged the judgement of 21 by polynary variable quantity after, select different control strategies according to time controling 24, determine PID Optimal Control 23:
When detected temperatures and design temperature difference comparsion are large, and when being greater than certain value, particularly in the stage of driving a well, fast PID control be carried out, control power supply with larger power stage, to improve the response speed of system.
When temperature arrives within the scope of a smaller temperature difference, finally determining that optimally-controlled control can prevent system overshoot with PID by pid parameter, by constantly revising Dynamic gene, finally can accomplish to stablize error free output.
Inversion unit 2 adopts single-phase full control inverter bridge, and combined by two half-bridge circuits, load is connected across between the output terminal of two half-bridges.
This intermediate frequency power supply is provided with power samples unit 7 at the output terminal of I.F.T. 13; this power samples unit 7 is connected with integral controller 6; the electric current of load-side will be taken from; the current signal of load-side is delivered to integral controller 6 equally; integral controller 6 carries out the control of protectiveness to output current according to current signal simultaneously, prevents the appearance of excess current.
This intermediate frequency power supply arranges voltage sampling unit 10 at the input end of uncontrollable rectifier unit 1, this voltage sampling unit 10 signal wire is connected with integral controller 6, voltage signal is delivered to integral controller 6, reach match with the interface voltage of integral controller 6 through overcommutation, voltage stabilizing; Integral controller 6 carries out the control of protectiveness to input voltage according to voltage sampling signal simultaneously, prevents superpotential appearance.
Spare interface is drawn by two wires in the DC link of this intermediate-frequency circuit, organic combination can be done with the RHVC of this pumping unit of well, oil pumper is operated in the regenerating braking energy (electricity namely sent) produced in descending stroke, by the link of setting, directly deliver in this power supply, decrease the energy obtained from electrical network, further save electric energy.
It is the direct supplys providing their required voltages to all control loops that the present embodiment comprises control power supply unit 11.In the present embodiment, the input end of integral controller 6 is provided with keyboard 9, for setup parameter, arranges display 12 at output terminal simultaneously, for displays temperature is poor, and the electric current of collection and voltage signal.
The utility model intermediate frequency power supply (selecting output power to be 50kW) is with energy-saving analysis during hollow sucker rod load running:
Do not adopt temperature closed loop system, according to the experience of field worker, be given in the output power value under load at that time, the heating power recording output is 46.3kW, and now wellhead temperature is measured as 80 DEG C.
Cut-in temperature closed-loop system, when wellhead temperature is still 80 DEG C, we are also 80 DEG C at setting " to fixed temperature ", and after closed-loop system work (about about 10 minutes), stable output power is at 41.2kW.
Illustrate that the hollow sucker rod load of heating 80 DEG C only needs 41.2kW just passable, the 46.3kW used than the former will save 5.1kW (individual well), and power saving rate is 11%.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (7)
1. an intelligent heating oil well two close cycles intermediate frequency power supply, comprise the intermediate-frequency circuit controlling oil well hollow sucker rod heating, intermediate-frequency circuit comprises uncontrollable rectifier unit, inversion unit and I.F.T., by uncontrollable rectifier unit access common frequency power network, it is characterized in that, also comprise:
Set temperature sampling unit gathers real time temperature to oil well hollow sucker rod;
Arrange integral controller, integral controller is used for employing temperature and compares to fixed temperature;
Driver element is set, accept the comparative result of integral controller and be converted to pulse-length modulation, for regulating the size of inversion unit output power in intermediate-frequency circuit, when realizing sample temperature decline, heating power can automatically, linear increment in real time, finally reach the state of the relatively stable operation of system.
2. according to intelligent heating oil well two close cycles intermediate frequency power supply according to claim 1, it is characterized in that, soft start unit is set between uncontrollable rectifier unit and inversion unit, soft start unit is connected with integral controller, three-phase alternating current is through uncontrollable rectifier unit, be rectified into DC voltage, by charging to filter capacitor after the resistance current limliting in soft start unit, after a period of time time delay, by integral controller output pulse signal, ohmically control machines conducting will be connected in parallel in soft start unit, namely charging current limiter resistance is excised, after DC voltage reaches certain value, inversion unit is just started working.
3. according to intelligent heating oil well two close cycles intermediate frequency power supply according to claim 2, it is characterized in that, integral controller in integral controller sends comparison signal and produces phase-shifted control signal by driver element, the inversion unit conducting that control is made up of IGBT power device and shutoff, after inversion unit has output voltage, after I.F.T. is isolated and is boosted, receive on hollow sucker rod, hold with or without electrification at I.F.T. outgoing side string, realize resonance with inductive load, make the output efficiency of device the highest.
4. according to intelligent heating oil well two close cycles intermediate frequency power supply according to claim 1, it is characterized in that, inversion unit adopts single-phase full control inverter bridge, and combined by two half-bridge circuits, load is connected across between the output terminal of two half-bridges.
5. according to intelligent heating oil well two close cycles intermediate frequency power supply according to claim 1; it is characterized in that; this intermediate frequency power supply is provided with power samples unit at the output terminal of I.F.T.; this power samples unit with compare integral controller and be connected; the electric current of load-side will be taken from; the current signal of load-side is delivered to integral controller equally, and integral controller carries out the control of protectiveness to output current according to current signal simultaneously, prevents the appearance of excess current.
6. according to intelligent heating oil well two close cycles intermediate frequency power supply according to claim 1, it is characterized in that, this intermediate frequency power supply arranges voltage sampling unit at the input end of uncontrollable rectifier unit, this voltage sampling unit signal is connected with integral controller, voltage signal is delivered to and compares integral controller, reach match with the interface voltage of integral controller through overcommutation, voltage stabilizing; Integral controller carries out the control of protectiveness to input voltage according to voltage sampling signal simultaneously, prevents superpotential appearance.
7. according to intelligent heating oil well two close cycles intermediate frequency power supply according to claim 1, it is characterized in that, draw spare interface by two wires in the DC link of this intermediate-frequency circuit, organic combination can be done with the RHVC of this pumping unit of well.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420416105.0U CN204065899U (en) | 2014-07-25 | 2014-07-25 | A kind of intelligent heating oil well two close cycles intermediate frequency power supply |
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| CN201420416105.0U CN204065899U (en) | 2014-07-25 | 2014-07-25 | A kind of intelligent heating oil well two close cycles intermediate frequency power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667269A (en) * | 2018-03-29 | 2018-10-16 | 湖南从义电炉设备有限公司 | A kind of thyristor intermediate frequency electric source intelligent monitor system |
| CN111625047A (en) * | 2020-07-06 | 2020-09-04 | 安阳复星合力新材料股份有限公司 | Heating power control method for intermediate frequency power supply |
-
2014
- 2014-07-25 CN CN201420416105.0U patent/CN204065899U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667269A (en) * | 2018-03-29 | 2018-10-16 | 湖南从义电炉设备有限公司 | A kind of thyristor intermediate frequency electric source intelligent monitor system |
| CN111625047A (en) * | 2020-07-06 | 2020-09-04 | 安阳复星合力新材料股份有限公司 | Heating power control method for intermediate frequency power supply |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20160725 |
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| CF01 | Termination of patent right due to non-payment of annual fee |