CN210724578U - Rectangular wave crude oil dehydration power supply system - Google Patents
Rectangular wave crude oil dehydration power supply system Download PDFInfo
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- CN210724578U CN210724578U CN201922262515.XU CN201922262515U CN210724578U CN 210724578 U CN210724578 U CN 210724578U CN 201922262515 U CN201922262515 U CN 201922262515U CN 210724578 U CN210724578 U CN 210724578U
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Abstract
The utility model discloses a rectangular wave crude oil dehydration electrical power generating system constructs H6 inverter circuit through using 6 switch tubes, makes the efficiency and the reliability of circuit higher. The utility model discloses a required alternating current electric field of crude oil dehydration power to the frequency is adjustable, can adapt to the difficult problem of dehydration that causes because of oil and water bonding degree difference, has improved crude oil dehydration's efficiency.
Description
Technical Field
The utility model belongs to the technical field of the crude oil dehydration, concretely relates to rectangular wave crude oil dehydration electrical power generating system.
Background
At present, under the situation of rapid soaring of the current Chinese economy, the energy demand is continuously increasing. Petroleum, as "industrial blood", has an irreplaceable position in the energy structure of our country. In the existing various demulsification dehydration processes, the electric dehydration method has the advantages of high dehydration efficiency, quick response, low energy consumption, small pollution and the like, so that the electric dehydration method is widely applied in the world.
In the electric dehydration method, the sine alternating current dehydration has the advantages of simple circuit structure and low equipment cost, and has higher reliability compared with other dehydration methods. Meanwhile, the direction of an external electric field for sine alternating current dehydration is high-frequency alternated, so that equipment such as a dehydration tank and the like is hardly corroded. However, because the voltage waveform applied to the electrodes is a sine wave, the maximum electric field intensity appears only at the wave crests and wave troughs, so that the H4 bridge rectangular wave alternating current dehydration method in the prior art has a high-frequency alternating pulse output electric field, the dehydration efficiency is high, the energy utilization rate is high, and the method is widely applied. However, since the amplitude of the output voltage is between tens of volts and one hundred volts, the method cannot be applied to high-voltage and high-power working occasions, and the output voltage waveform is similar to a rectangular wave, the dehydration electric field is unstable, the energy utilization rate is low, and the dehydration efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough among the prior art, the utility model provides a pair of rectangular wave crude oil dehydration electrical power generating system has solved the problem that prior art exists.
In order to achieve the purpose of the invention, the utility model adopts the technical scheme that: a rectangular wave crude oil dehydration power supply system comprises a transformer T, wherein the transformer T comprises a primary side N1And secondary side N2；
The secondary side N2Are respectively connected with the output resistor R1Are connected at both ends, the primary side N1One end of each of which is connected with the switch tube S5Emitter and switch tube S3Collector and diode D7Is connected to the positive pole of the primary side N1The other end of the first and second switch tubes are respectively connected with a switch tube S6Emitter and switch tube S4Collector and diode D8Is connected to the positive pole of the switching tube S3Respectively with the switching tube S4Emitter electrode, capacitor C0One terminal of (1), a capacitor C1One terminal of (1), diode D0Anode of (2), diode D4Anode of (2), diode D5Anode and diode D6Is connected to the positive pole of the switching tube S5Respectively with the diode D8Negative electrode of (2) and switching tube S1Of the switching tube S6Respectively with the diode D7Negative electrode of (2) and switching tube S2Of the switching tube S2Respectively with the switch tube S1Collector electrode and capacitor C1Another terminal of (1) and an inductance L0Is connected to one end of the inductor L0Respectively at the other endAnd switching tube VT0Source and diode D0Is connected to the negative pole of the switching tube VT0Respectively with a resistor R0One end of (1), switch K0One terminal of and a capacitor C0Is connected to the other end of the resistor R0The other end of the first and second switches are respectively connected with a switch K0Another terminal of (1), diode D1Cathode of (2), diode D2And diode D3The negative electrode of (1) is connected;
the diode D1Respectively with one end of fuse FU1 and diode D4Is connected to the cathode of the diode D2Respectively with one end of fuse FU2 and diode D5Is connected to the cathode of the diode D3Respectively with one end of fuse FU3 and diode D6The other end of the fuse FU1, the other end of the fuse FU2 and the other end of the fuse FU1 are connected with the A phase, the B phase and the C phase of the three-phase circuit in a one-to-one correspondence mode.
Further, the switching tube VT0Is a power switch tube.
Further, the switch tube S1Switch tube S2Switch tube S3Switch tube S4Switch tube S5And a switching tube S6All are full-control type switch tubes.
Further, the diode D7And a diode D8Are all high-voltage resistant freewheeling diodes.
The utility model has the advantages that:
(1) the utility model discloses an use 6 switch tubes to construct H6 inverter circuit, make the output voltage of circuit have higher reliability, and the voltage waveform is single-phase rectangular wave, and the dehydration electric field of formation is more stable.
(2) The utility model discloses a required alternating current electric field of crude oil dehydration power to frequency and amplitude are adjustable, can adapt to the difficult problem of dehydration that causes because of oil and water bonding degree difference, have improved crude oil dehydration's efficiency.
Drawings
FIG. 1 is a circuit diagram of a rectangular wave crude oil dehydration power supply system according to the present invention.
Fig. 2 is a schematic diagram of a control strategy according to the present invention.
Fig. 3 is a schematic view of the working state of the present invention.
Fig. 4 is a schematic view of the second working state of the present invention.
Fig. 5 is a schematic diagram of the working state of the present invention.
Fig. 6 is a diagram illustrating the four working states of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
The following describes embodiments of the present invention in detail with reference to the drawings.
As shown in FIG. 1, a rectangular wave crude oil dehydration power supply system comprises a transformer T, wherein the transformer T comprises a primary side N1And secondary side N2；
The secondary side N2Are respectively connected with the output resistor R1Are connected at both ends, the primary side N1One end of each of which is connected with the switch tube S5Emitter and switch tube S3Collector and diode D7Is connected to the positive pole of the primary side N1The other end of the first and second switch tubes are respectively connected with a switch tube S6Emitter and switch tube S4Collector and diode D8Is connected to the positive pole of the switching tube S3Respectively with the switching tube S4Emitter electrode, capacitor C0One terminal of (1), a capacitor C1One terminal of (1), diode D0Anode of (2), diode D4Anode of (2), diode D5Anode and diode D6Is connected to the positive electrode ofThe switch tube S5Respectively with the diode D8Negative electrode of (2) and switching tube S1Of the switching tube S6Respectively with the diode D7Negative electrode of (2) and switching tube S2Of the switching tube S2Respectively with the switch tube S1Collector electrode and capacitor C1Another terminal of (1) and an inductance L0Is connected to one end of the inductor L0The other end of the first and second switching tubes are respectively connected with a switching tube VT0Source and diode D0Is connected to the negative pole of the switching tube VT0Respectively with a resistor R0One end of (1), switch K0One terminal of and a capacitor C0Is connected to the other end of the resistor R0The other end of the first and second switches are respectively connected with a switch K0Another terminal of (1), diode D1Cathode of (2), diode D2And diode D3The negative electrode of (1) is connected;
the diode D1Respectively with one end of fuse FU1 and diode D4Is connected to the cathode of the diode D2Respectively with one end of fuse FU2 and diode D5Is connected to the cathode of the diode D3Respectively with one end of fuse FU3 and diode D6The other end of the fuse FU1, the other end of the fuse FU2 and the other end of the fuse FU1 are connected with the A phase, the B phase and the C phase of the three-phase circuit in a one-to-one correspondence mode.
The switching tube VT0Is a power switch tube, the switch tube S1Switch tube S2Switch tube S3Switch tube S4Switch tube S5And a switching tube S6All are fully-controlled switch tubes, the diode D7And a diode D8Are all high-voltage resistant freewheeling diodes.
As shown in fig. 2, the control strategy of the present invention is: detecting capacitance C1Voltage u across1Voltage u to1And a reference voltage urefComparing to obtain an error voltage signal ucref(ii) a The error voltage signal ucrefOuter loop proportional control with input coefficient PIModulating in a modulator to obtain a first modulation signal ucontrol1A; the first modulation signal ucontrol1 and unipolar triangular wave carrier ucarrierSending the voltage to a comparator for comparison to obtain a switching tube VT0According to the driving signal, and driving the switching tube VT by PWM0And (5) controlling.
Detecting the primary side N1Current i at one terminal1Will current i1And a reference current irefComparing to obtain an error current signal icrefThe error current signal icrefInput coefficient of KpIs modulated in the outer loop proportional controller to obtain a second modulation signal ucontrol2. the second modulated signal ucontrol2 and unipolar triangular wave carrier ucarrierSending the signal into a comparator for comparison to obtain a switching tube S1-S6According to the driving signal, and driving the switching tube S by PWM1-S6And (5) controlling.
In this embodiment, the utility model discloses possess 4 operating condition, specifically as follows.
Working state one
When the current i is as shown in FIG. 31>0, switching tube S5Conducting, switching tube S2Switch tube S3And a switching tube S6When turned off, the switch tube S1And a switching tube S4And is turned on according to the same driving signal. At this time, the H6 bridge inverter circuit input voltage E and the switch tube S1Switch tube S5Primary side N1And a switching tube S4Forming a forward charging closed loop, current i1To the primary side N1Carrying out forward charging with current i1In the increasing state, the secondary side N of the transformer T2Output voltage uout＝KNE，KNRepresenting the turns ratio of the transformer T winding.
Working state two
When the current i is as shown in FIG. 41>0, switching tube S5Conducting, switching tube S1Switch tube S2Switch tube S3Switch tubeS4And a switching tube S6When the power is turned off, the H6 bridge inverter circuit inputs the voltage E and the diode D8Switch tube S5And a primary side N1Forming a closed circuit of forward discharge, primary side N1Discharging the circuit in forward direction with a current i1In the reduced state, the secondary side N of the transformer T2Output voltage uout＝0。
Working state three
When the current i is as shown in FIG. 51<0, switching tube S6Conducting, switching tube S1Switch tube S4And a switching tube S5When turned off, the switch tube S2And a switching tube S3Conducting according to the same driving signal; at this time, the H6 bridge inverter circuit input voltage E and the switch tube S2Switch tube S6Primary side N1And a switching tube S3Forming a reverse charging closed loop, current i1To the primary side N1Is reversely charged with a current i1In the increasing state, the secondary side N of the transformer T2Output voltage uout＝-KNE。
Working state four
When the current i is as shown in FIG. 61<0, switching tube S6Conducting, switching tube S1Switch tube S2Switch tube S3Switch tube S4And a switching tube S5When the power is turned off, the H6 bridge inverter circuit inputs the voltage E and the diode D7Switch tube S6And a primary side N1Forming a reverse discharge closed circuit, primary side N1Reverse discharging the circuit with current i1In the reduced state, the secondary side N of the transformer T2Output voltage uout＝0。
The utility model discloses an use 6 switch tubes to construct H6 inverter circuit, make the output voltage of circuit have higher reliability, and the voltage waveform is single-phase rectangular wave, and the dehydration electric field of formation is more stable. The utility model discloses a required alternating current electric field of crude oil dehydration power to frequency and amplitude are adjustable, can adapt to the difficult problem of dehydration that causes because of oil and water bonding degree difference, have improved crude oil dehydration's efficiency.
Claims (4)
1. The rectangular wave crude oil dehydration power supply system is characterized by comprising a transformer T, wherein the transformer T comprises a primary side N1And secondary side N2；
The secondary side N2Are respectively connected with the output resistor R1Are connected at both ends, the primary side N1One end of each of which is connected with the switch tube S5Emitter and switch tube S3Collector and diode D7Is connected to the positive pole of the primary side N1The other end of the first and second switch tubes are respectively connected with a switch tube S6Emitter and switch tube S4Collector and diode D8Is connected to the positive pole of the switching tube S3Respectively with the switching tube S4Emitter electrode, capacitor C0One terminal of (1), a capacitor C1One terminal of (1), diode D0Anode of (2), diode D4Anode of (2), diode D5Anode and diode D6Is connected to the positive pole of the switching tube S5Respectively with the diode D8Negative electrode of (2) and switching tube S1Of the switching tube S6Respectively with the diode D7Negative electrode of (2) and switching tube S2Of the switching tube S2Respectively with the switch tube S1Collector electrode and capacitor C1Another terminal of (1) and an inductance L0Is connected to one end of the inductor L0The other end of the first and second switching tubes are respectively connected with a switching tube VT0Source and diode D0Is connected to the negative pole of the switching tube VT0Respectively with a resistor R0One end of (1), switch K0One terminal of and a capacitor C0Is connected to the other end of the resistor R0The other end of the first and second switches are respectively connected with a switch K0Another terminal of (1), diode D1Cathode of (2), diode D2And diode D3The negative electrode of (1) is connected;
the diode D1Respectively with one end of fuse FU1 and diode D4Is connected to the cathode of the diode D2Respectively positive electrode ofWith one terminal of fuse FU2 and diode D5Is connected to the cathode of the diode D3Respectively with one end of fuse FU3 and diode D6The other end of the fuse FU1, the other end of the fuse FU2 and the other end of the fuse FU1 are connected with the A phase, the B phase and the C phase of the three-phase circuit in a one-to-one correspondence mode.
2. The square wave crude oil dehydration power supply system of claim 1 wherein said switching tube VT0Is a power switch tube.
3. The square wave crude oil dehydration power supply system according to claim 1 characterized in that said switching tube S1Switch tube S2Switch tube S3Switch tube S4Switch tube S5And a switching tube S6All are full-control type switch tubes.
4. The square wave crude oil dehydration power supply system of claim 1 wherein said diode D7And a diode D8Are all high-voltage resistant freewheeling diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922262515.XU CN210724578U (en) | 2019-12-16 | 2019-12-16 | Rectangular wave crude oil dehydration power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922262515.XU CN210724578U (en) | 2019-12-16 | 2019-12-16 | Rectangular wave crude oil dehydration power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210724578U true CN210724578U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922262515.XU Expired - Fee Related CN210724578U (en) | 2019-12-16 | 2019-12-16 | Rectangular wave crude oil dehydration power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210724578U (en) |
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2019
- 2019-12-16 CN CN201922262515.XU patent/CN210724578U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 Termination date: 20201216 |