阅读说明：本技术 一种用于非常规电压等级电潜泵的补偿装置及方法 (Compensation device and method for unconventional voltage grade electric submersible pump ) 是由 刘军 杜正旺 谢泳 李晓鹏 翟化仁 郝照勇 赵永华 赵明 吴洪胜 李东波 韩运胜 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种用于非常规电压等级电潜泵的补偿装置及方法,所述补偿装置包括转换开关、调压装置和无功补偿装置；转换开关的一端与所述电潜泵的引入电源连接,所述转换开关的另一端与所述调压装置的一次侧连接,所述调压装置的二次侧分别通过开关控制器件与所述无功补偿装置连接,所述调压装置的一次侧还并联在外部用于提供电潜泵电源的变压器与连接所述电潜泵的电潜泵回路中；其效果是：通过设有的转换开关和调压装置,将不同等级的非常规电压调节成同一等级的常规电压后,再投入无功补偿装置,这样就可以对电压等级在调压装置一次侧电压等级范围的电潜泵进行无功补偿,解决了采油电潜泵无功补偿困难的问题,提高了电潜泵的功率因数。(The invention discloses a compensation device and a method for an unconventional voltage level electric submersible pump, wherein the compensation device comprises a change-over switch, a voltage regulation device and a reactive power compensation device; one end of a change-over switch is connected with an introduced power supply of the electric submersible pump, the other end of the change-over switch is connected with a primary side of a voltage regulating device, a secondary side of the voltage regulating device is respectively connected with the reactive power compensation device through a switch control device, and the primary side of the voltage regulating device is also connected in parallel with a transformer which is externally used for providing a power supply of the electric submersible pump and an electric submersible pump loop which is connected with the electric submersible pump; the effect is as follows: the non-conventional voltages with different grades are regulated into the conventional voltage with the same grade through the change-over switch and the voltage regulating device, and then the non-conventional voltage is input into the reactive power compensation device, so that the reactive power compensation can be carried out on the electric submersible pump with the voltage grade within the range of the primary side voltage grade of the voltage regulating device, the problem of difficulty in reactive power compensation of the oil extraction electric submersible pump is solved, and the power factor of the electric submersible pump is improved.)

1. A compensation device for an unconventional voltage class electric submersible pump is characterized by comprising a change-over switch, a voltage regulating device and a reactive compensation device; the voltage regulating device comprises a plurality of voltage regulating units which have different coil turns and are provided with a plurality of primary side wiring terminals and secondary side wiring terminals;

one end of the change-over switch is connected with an introduced power supply of the electric submersible pump, the other end of the change-over switch is connected with the primary side of the voltage regulating device, the secondary side of the voltage regulating device is connected with the reactive power compensation device through a switch control device, and the primary side of the voltage regulating device is further connected in parallel with a transformer which is externally used for providing a power supply of the electric submersible pump and an electric submersible pump loop which is connected with the electric submersible pump.

2. A compensator according to claim 1, wherein the transfer switch comprises a plurality of transfer units, each transfer unit comprising a stationary contact and a plurality of moving contacts, the stationary contacts being connected to the phase lines of the incoming power supply, and the moving contacts being connected to the primary side terminals of the voltage regulator units.

3. A compensation arrangement for an unconventional voltage class electric submersible pump according to claim 2, characterized in that the switch control device is an IGBT device.

4. A compensator unit for an unconventional voltage class electric submersible pump according to any one of claims 1 to 3, wherein the number of reactive compensation devices is plural, and the compensation capacitors in each reactive compensation device are connected in a delta manner.

5. The compensation apparatus as claimed in claim 4, wherein the secondary side of the voltage regulator is further connected in series with an inductor for filtering.

6. A compensation method for an unconventional voltage class electric submersible pump, applied to a compensation device for an unconventional voltage class electric submersible pump and to a control device and a sensor according to claim 5, the method comprising:

connecting the primary side of a voltage regulating device in parallel in a transformer for providing power supply of an electric submersible pump and an electric submersible pump loop connected with the electric submersible pump;

the secondary side of the voltage regulating device is respectively connected with the reactive power compensation device through a switch control device;

acquiring the voltage level of the electric submersible pump loop by a sensor;

adjusting the position of a primary side wiring terminal connected with a movable contact in the change-over switch according to the voltage grade through the control device;

and triggering the switch control device through the control device so as to put into the reactive power compensation device.

7. A compensation method for an unconventional voltage class electric submersible pump according to claim 6, further comprising:

and the sensor is used for acquiring a power factor when the oil extraction electric submersible pump operates, and the control device controls the number of the on-off control devices according to the power factor so as to dynamically control the input quantity of the reactive compensation device.

Technical Field

The invention relates to the technical field of reactive compensation, in particular to a compensation device and method for an unconventional voltage-class electric submersible pump.

Background

At present, the oil production wells in the oil production area have different voltage levels of oil production electric submersible pumps due to different oil well parameters, such as different well depths, and the oil production electric submersible pump units are all supplied with power by independent special transformers. Due to the limitation of voltage class, the voltage is mostly unconventional voltage of about 1000v to 3000v, the actual capacitor specification does not have a reactive compensation capacitor matched with the unconventional voltage class, even if reactive compensation is carried out, capacitor customization is needed, the number of oil production wells is large, the cost is huge, and the realization is very difficult and unrealistic; therefore, the existing oil extraction electric submersible pump does not carry out reactive compensation, the power factor of the equipment is reduced due to insufficient reactive compensation, and the electric charge expense is increased and also the electric charge penalty of an electric power department is received.

Disclosure of Invention

The embodiment of the invention aims to provide a compensation device and a compensation method for an unconventional voltage class electric submersible pump, so as to solve the problem that reactive compensation of an oil extraction electric submersible pump in the prior art is difficult to realize.

In a first aspect: the embodiment of the invention provides a compensation device for an unconventional voltage-class electric submersible pump, which comprises a change-over switch, a voltage regulating device and a reactive compensation device, wherein the change-over switch is connected with the voltage regulating device; the voltage regulating device comprises a plurality of voltage regulating units which have different coil turns and are provided with a plurality of primary side wiring terminals and secondary side wiring terminals;

one end of the change-over switch is connected with an introduced power supply of the electric submersible pump, the other end of the change-over switch is connected with the primary side of the voltage regulating device, the secondary side of the voltage regulating device is connected with the reactive power compensation device through a switch control device, and the primary side of the voltage regulating device is further connected in parallel with a transformer which is externally used for providing a power supply of the electric submersible pump and an electric submersible pump loop which is connected with the electric submersible pump.

As a preferred technical solution of the present invention, the transfer switch includes a plurality of transfer units, each of which includes a fixed contact and a plurality of movable contacts, the fixed contact is correspondingly connected to the phase line of the incoming power supply, and the movable contact is correspondingly connected to the primary side connection terminal in the voltage regulating unit.

As a preferred technical solution of the present invention, the switching control device is an IGBT device.

As a preferred embodiment of the present invention, the number of the reactive power compensation devices is plural, and the compensation capacitors in the respective reactive power compensation devices are connected in a triangular manner.

As a preferred technical solution of the present invention, the secondary side of the voltage regulating device is further connected in series with an inductance coil for filtering.

In a second aspect: an embodiment of the present invention provides a compensation method for an unconventional voltage class electric submersible pump, which is applied to the compensation device for the unconventional voltage class electric submersible pump, the control device and the sensor, wherein the method comprises the following steps:

connecting the primary side of a voltage regulating device in parallel in a transformer for providing power supply of an electric submersible pump and an electric submersible pump loop connected with the electric submersible pump;

the secondary side of the voltage regulating device is respectively connected with the reactive power compensation device through a switch control device;

acquiring the voltage level of the electric submersible pump loop by a sensor;

adjusting the position of a primary side wiring terminal connected with a movable contact in the change-over switch according to the voltage grade through the control device;

and triggering the switch control device through the control device so as to put into the reactive power compensation device.

As a preferred embodiment of the present invention, the method further comprises:

and the sensor is used for acquiring a power factor when the oil extraction electric submersible pump operates, and the control device controls the number of the on-off control devices according to the power factor so as to dynamically control the input quantity of the reactive compensation device.

By adopting the technical scheme, the method has the following advantages: according to the compensation device and the compensation method for the unconventional voltage level electric submersible pump, unconventional voltages of different levels are regulated into the conventional voltage of the same level through the change-over switch and the voltage regulating device, and then the reactive compensation device is put into the compensation device, so that the reactive compensation can be carried out on the electric submersible pump with the voltage level within the range of the primary side voltage level of the voltage regulating device, the problem of difficulty in reactive compensation of the oil extraction electric submersible pump is solved, the power factor of the electric submersible pump is improved, the electricity expense is reduced, and meanwhile, the electricity expense penalty caused by low power factor is avoided; meanwhile, the characteristic of compatibility of multiple voltage levels is realized, the compensation device can be standardized, and the corresponding equipment investment is reduced.

Drawings

FIG. 1 is a schematic structural diagram of a compensation device for an unconventional voltage class submersible pump according to an embodiment of the present invention;

FIG. 2 is a schematic block diagram of a compensation arrangement for an unconventional voltage class electrical submersible pump according to an embodiment of the present invention;

FIG. 3 is a flow chart of a compensation method for an unconventional voltage class electrical submersible pump according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific examples, which are used for illustrating the present invention and are not intended to limit the scope of the present invention.

Referring to fig. 1 to 2, a compensation device for an unconventional voltage class electric submersible pump provided by the embodiment of the invention comprises a change-over switch, a voltage regulating device 3 and a reactive compensation device 4; the voltage regulating device 3 comprises a plurality of voltage regulating units which have different coil turns and are provided with a plurality of primary side wiring terminals and secondary side wiring terminals;

one end of the change-over switch is connected with an introduced power supply of the electric submersible pump, the other end of the change-over switch is connected with the primary side of the voltage regulating device, the secondary side of the voltage regulating device 3 is connected with the reactive power compensation device 4 through a switch control device, and the primary side of the voltage regulating device 3 is also connected in parallel with a transformer 2 which is externally used for providing a power supply of the electric submersible pump and an electric submersible pump loop 1 which is connected with the electric submersible pump.

Specifically, when the devices are applied, the devices may be installed in a reactive compensation cabinet, and the outer surface of the reactive compensation cabinet is further provided with a voltmeter, an ammeter, a power meter, a touch control screen, and the like, which should be understood by those skilled in the art and will not be described herein again;

the oil recovery electric submersible pump is powered by an independent special transformer, namely the transformer in fig. 2, and the power supply of the electric submersible pump is a three-phase power supply with reference to fig. 1 and is indicated by A, B, C; correspondingly, the output end of the transformer is the power supply of the electric submersible pump and is the leading-in power supply of the compensation device, so that the voltage levels of the power supplies used by the transformer and the leading-in power supply are consistent, the leading-in power supply is connected with the change-over switch after passing through the isolating switch QF0 and the fuse in sequence, the change-over switch comprises a plurality of change-over units, each change-over unit comprises a fixed contact and a plurality of movable contacts, the fixed contact is correspondingly connected with a phase line of the leading-in power supply, and the movable contact is correspondingly connected with a primary side wiring terminal in the voltage regulating unit.

It should be noted that the number of contacts, devices, and the like in the drawings of the present embodiment is merely an example, and is not limited thereto, and in fig. 1, the transfer switch is indicated by a letter K, and as can be seen from fig. 1, the respective conversion units are linked; for example, when the contact point is changed from 1 to 2, all of the three conversion units are connected to 2; the voltage regulating device is indicated by letter T, and L1, L2 and L3 indicate voltage regulating units with different coil turns; therefore, when the voltage regulator is used conveniently, the voltage regulator is suitable for the conditions of different unconventional multi-voltage levels, and the unconventional voltages of different levels are regulated into the conventional voltage of the same level (for example, between 380 and 400V) through the secondary side; the switch control devices are respectively represented by D1, D2 and D3, in the embodiment, the switch control devices adopt IGBT devices, the on-off triggering of the switch control devices can be realized through a touch control screen or an external control device correspondingly connected with the touch control screen, and the external control device or the touch control screen is also connected with a voltmeter and an ammeter; the reactive power compensation devices are denoted by a, b, and c, respectively, and in the present embodiment, the number of the reactive power compensation devices is plural, and the compensation capacitors in the respective reactive power compensation devices are connected in a triangular manner.

According to the scheme, the unconventional voltages with different levels are regulated into the conventional voltages with the same level through the change-over switch and the voltage regulating device, and then the reactive compensation device is put into the electric submersible pump, so that reactive compensation can be performed on the electric submersible pump with the voltage level within the range of the voltage level of the primary side of the voltage regulating device, the problem of difficulty in non-conventional multi-voltage-level reactive compensation in the oil extraction electric submersible pump is solved, the power factor of the electric submersible pump is improved, the electric charge expenditure is reduced, and meanwhile, the electric charge penalty caused by low power factor is avoided; meanwhile, the characteristic of compatibility of multiple voltage levels is realized, the compensation device can be standardized, and the corresponding equipment investment is reduced.

Further, in order to achieve a better reactive compensation effect, the secondary side of the voltage regulating device is also connected with an inductance coil for filtering in series; this also improves the line quality to some extent.

It should be noted that the above application is only an example, and the technical solution can also be applied to other reactive power compensation applied to non-conventional voltage class equipment.

With reference to fig. 3, an embodiment of the present invention further provides a compensation method for an unconventional voltage class electric submersible pump, which is applied to the compensation device for the unconventional voltage class electric submersible pump and the control device and the sensor, which are described in the foregoing, and the method includes:

s101, connecting the primary side of a voltage regulating device in parallel in a transformer for providing a power supply of an electric submersible pump and an electric submersible pump loop connected with the electric submersible pump;

s102, connecting the secondary side of the voltage regulating device with a reactive power compensation device through a switch control device respectively;

s103, acquiring the voltage grade of the electric submersible pump loop by a sensor;

s104, adjusting the position of a primary side wiring terminal connected with a movable contact in the change-over switch according to the voltage grade through the control device;

and S105, triggering the switch control device through the control device so as to input the reactive power compensation device.

Specifically, the control device may adopt a touch control screen, and a processing chip is integrated inside the touch control screen, and those skilled in the art should understand that the sensors include a voltmeter, an ammeter, a power meter and the like.

It should be noted that, in the above method steps, the detailed description thereof can be referred to the foregoing description, and the description is not repeated here.

According to the method, before reactive compensation is carried out, the primary side coil of the voltage regulating device is adjusted according to the voltage grade of the electric submersible pump loop, so that the output voltage of the secondary side is between the preset voltages, namely common conventional voltages (for example, between 380 and 400V), and the reactive compensation device is put into the electric submersible pump after the adjustment is finished, so that reactive compensation can be carried out on the electric submersible pump with the voltage grade within the range of the primary side voltage grade of the voltage regulating device.

Further, on the basis of the above scheme, the method further comprises:

and the sensor is used for acquiring a power factor when the oil extraction electric submersible pump operates, and the control device controls the number of the on-off control devices according to the power factor so as to dynamically control the input quantity of the reactive compensation device.

The arrangement further improves the practicability and intelligence of use, so that the input quantity of the reactive compensation device can be controlled according to the actual application condition, and the situation of over-compensation is avoided.

On the basis of the scheme, the method further comprises the following steps:

and the secondary side of the voltage regulating device is also connected with an inductance coil for filtering in series.

The reactive loss is compensated, the quality of the line is improved, and the distortion rate of the line is improved.

In the description herein, references to the description of "one embodiment," "an example," "specifically," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Finally, it should be noted that the above description is only a preferred embodiment of the present application and is illustrative of the technical principles applied. It will be appreciated by those skilled in the art that the scope of the invention herein disclosed is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the present application.