CN111864772A - Power supply unit is gathered in oil well switch board shaft bottom - Google Patents

Power supply unit is gathered in oil well switch board shaft bottom Download PDF

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Publication number
CN111864772A
CN111864772A CN202010767400.0A CN202010767400A CN111864772A CN 111864772 A CN111864772 A CN 111864772A CN 202010767400 A CN202010767400 A CN 202010767400A CN 111864772 A CN111864772 A CN 111864772A
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China
Prior art keywords
power supply
module
unit
energy storage
input
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Pending
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CN202010767400.0A
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Chinese (zh)
Inventor
郝成芳
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Ningbo Jianhui New Energy Technology Co Ltd
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Ningbo Jianhui New Energy Technology Co Ltd
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Priority to CN202010767400.0A priority Critical patent/CN111864772A/en
Publication of CN111864772A publication Critical patent/CN111864772A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
    • H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/01—Arrangements for reducing harmonics or ripples
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

Abstract

The invention discloses a downhole acquisition power supply device of an oil well control cabinet, which comprises a power supply input module and a first power supply module; the input end of the first power supply module is connected with the output end of the power supply input module; the output end of the first power supply module supplies power to the acquisition module; the first power supply module comprises an energy storage unit, and the energy storage unit is arranged between the output end of the first power supply module and the power supply input module. The invention effectively solves the problem of midway power failure of the acquisition module caused by the working frequency of the submersible plunger pump.

Description

Power supply unit is gathered in oil well switch board shaft bottom
Technical Field
The invention relates to the field of oil field digitization, in particular to a bottom hole collection power supply device of an oil well control cabinet.
Background
In the exploration and development process of petroleum resources, the testing of the state of an oil well has important significance for maintaining the sustainable utilization of the resources. One important function is the collection of information at the bottom of the well, i.e. the information at the bottom of the well is collected and transmitted to the well for real-time detection and analysis. The information acquisition mainly refers to parameters such as underground temperature, pressure and the like, and the submersible direct-drive screw pump can realize closed-loop control on the basis of underground power carrier data acquisition and provides guarantee for stable operation of a unit; and providing a basis for subsequent system fault diagnosis and big data fault analysis.
The underground carrier acquisition module is mainly powered by a tap of one phase on the submersible direct-drive screw pump, and the underground carrier acquisition module is powered by a power cable after voltage excitation is given out by the underground control cabinet part. The drive screw pump system is controlled to have intermittence, and the submersible plunger pump works frequently to cause the problem that the carrier acquisition module is powered off halfway.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a downhole acquisition power supply device of an oil well control cabinet, which effectively solves the problem of midway power failure of an acquisition module caused by the working frequency of an oil-submerged plunger pump.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a downhole acquisition power supply device of an oil well control cabinet comprises a power supply input module and a first power supply module; the input end of the first power supply module is connected with the output end of the power supply input module; the output end of the first power supply module supplies power to the acquisition module; the first power supply module comprises an energy storage unit, and the energy storage unit is arranged between the output end of the first power supply module and the power supply input module.
The acquisition module is a carrier acquisition module.
When the power supply input module has a voltage input state, voltage is transmitted to the first power supply module through the power supply input module; at the moment, an energy storage unit arranged in the first power supply module starts to store energy, and the output end of the first power supply module outputs working voltage for the acquisition module to work;
when the power supply input module has no voltage input state, the energy storage unit starts to discharge, and the first power supply module outputs working voltage for the acquisition module to work at the output end of the energy storage unit;
by adopting the structure, the energy storage unit can store and charge energy under the condition that the power supply input module has input voltage; the energy storage unit discharges under the condition that the power supply input module has no input voltage to supply power for the first power supply module; the first power supply module can still output voltage to supply the function of the acquisition module under the condition that the power supply input module is powered off.
Specifically, the voltage of the power supply input module is derived from a tap of one phase on the submersible direct-drive screw pump; when the submersible direct-drive screw pump works normally, a tap of one phase on the submersible direct-drive screw pump supplies power to the power supply input module; when the submersible direct-drive screw pump is in the intermittent working period, a tap of one phase on the submersible direct-drive screw pump stops supplying power to the power supply input module, namely the power supply input module is powered off without voltage input.
Further, the oil well control cabinet downhole acquisition power supply device comprises a second power supply module; the input end of the second power supply module is connected with the output end of the power supply input module; and the output end of the second power supply module supplies power to the control module.
The control module generally adopts a singlechip, and mainly receives the data acquired by the acquisition module and then sends the data to the well.
The energy storage capacity of the energy storage unit is effective, so that the electric quantity which can be provided by the energy storage unit is limited under the condition of power failure, and the power consumption of the control module system is larger; the event adopts above-mentioned structure, sets up the second power module of the same kind all the way and supplies power for control module more, separately supplies power with collection module and control module, prevents under the circumstances of outage, and control module consumes the electric quantity in the energy storage unit fast, guarantees first power module can provide operating voltage for collection module all the time under the circumstances of outage.
Further, the first power supply module comprises a first switching power supply unit, and the first switching power supply unit is arranged between the energy storage module and the output end of the first power supply module; the second power supply module comprises a second switching power supply unit, and the second switching power supply unit is arranged in front of the output end of the second power supply module.
By adopting the structure, the first switching power supply unit converts the voltage input to the first switching power supply unit by the first power supply module and outputs the working voltage required by the acquisition module during working;
the second switching power supply unit converts the voltage input by the second power supply module to the second switching power supply unit and outputs the working voltage required by the control module during working;
specifically, the first switching power supply unit and the second switching power supply unit include a switching power supply chip and a peripheral circuit thereof.
Further, the power supply input module is provided with a carrier isolation unit.
The carrier isolation unit comprises differential mode inductors L1 and L2, is mainly used for isolating high-frequency carrier signals, placing power line carrier signals for attenuation and playing a certain filtering effect;
the carrier isolation unit further comprises a common-mode inductor T1, which is mainly used for suppressing common-mode noise.
Further, the power supply input module is also provided with a safety unit, specifically a fuse; the protection circuit is mainly used for alternating current input protection, namely, the circuit is prevented from being overloaded and short-circuited.
Further, the oil well control cabinet downhole collection power supply device comprises a first rectification module; the first rectifying module is arranged at the joint of the power supply input module and the first power supply module.
The power supply input module inputs alternating current, and the first power supply module needs to output direct current; by adopting the structure, the alternating current input by the power supply input module is converted into the direct current through the first rectifying module.
Specifically, the first rectifying module is a full-bridge circuit composed of four diodes; the anode of the first diode is connected with the cathode of the second diode, and an alternating current input end is led out of the connection position; the anode of the second diode is connected with the anode of the third diode, and a direct current cathode output end is led out of the connection position; the cathode of the third diode is connected with the anode of the fourth diode, and an alternating current input end is led out of the connection position; the cathode of the fourth diode is connected with the cathode of the first diode, and a direct current anode output end is led out of the connection position;
the alternating current input end in the first rectifying module is connected with the power supply input module; the output end of the direct current negative electrode is grounded; the direct current positive electrode output end is connected with the energy storage unit and the first switching power supply unit.
Further, the oil well control cabinet downhole collection power supply device comprises a second rectification module, and the second power supply module needs to output direct current; the second rectifying module is arranged at the joint of the power supply input module and the second power supply module.
The power supply input module inputs alternating current; by adopting the structure, the alternating current input by the power supply input module is converted into the direct current through the second rectifying module.
Specifically, the second rectification module is a full-bridge circuit composed of four diodes, and the structure of the full-bridge circuit is the same as that of the first rectification module; the alternating current input end of the second rectifying module is connected with the power supply input module; the output end of the direct current negative electrode is grounded; and the direct current positive electrode output end is connected with the second switching power supply unit.
Furthermore, a pre-charging current-limiting unit is arranged in front of the energy storage unit.
The energy storage unit is specifically understood as follows: the power supply system is characterized in that the power supply input module is arranged between the power supply input module and the energy storage unit, specifically between the first rectifying module and the energy storage unit.
The pre-charging current-limiting unit is a current-limiting resistor and is mainly used for limiting the current and preventing the service life of the energy storage unit from being shortened due to overlarge instantaneous current when the energy storage unit is charged.
Further, a direct current input protection unit is arranged in front of the first switching power supply unit.
The front of the first switching power supply unit can be understood as the position between the energy storage unit and the first switching power supply unit.
With the above structure, the dc input protection unit is mainly used for protecting the input of the first switching power supply unit.
Further, a direct current input protection unit is arranged in front of the second switching power supply unit.
The second switching power supply unit is specifically understood as follows: the power supply circuit comprises a first power supply unit, a second power supply unit, a first rectification module and a second switching power supply unit.
With the above structure, the dc input protection unit is mainly used for protecting the input of the second switching power supply unit.
Further, the energy storage unit comprises two energy storage capacitors with larger capacitance; one end of the energy storage capacitor is connected with the output end of the first power supply module, and the other end of the energy storage capacitor is grounded.
By adopting the structure, the energy storage capacitor is used for storing energy so as to ensure that the normal power supply requirement of the acquisition module is maintained during midway power failure.
Further, the direct current input protection unit comprises an anti-reverse diode and a protection diode; the anti-reverse diodes in the direct current input protection units arranged in the first power supply module and the second power supply module are respectively connected in series in front of the first switching power supply unit and the second switching power supply unit; the negative electrodes of the protection diodes in the direct current input protection units arranged on the first power supply module and the second power supply module are respectively connected with the first switching power supply unit and the second switching power supply unit, and the positive electrodes of the protection diodes are grounded.
By adopting the structure, the anti-reverse diode is used for preventing the voltage from being reversely input into the first switching power supply unit and the second switching power supply unit to cause the damage of components; and the protection diode adopts a TVS (transient voltage suppressor) tube and is used for transient overload protection of the first switching power supply unit and the second switching power supply unit.
Compared with the prior art, the invention has the following beneficial effects:
(1) the oil well control cabinet bottom hole collection power supply device is provided with the energy storage unit, so that the problem of midway power failure of the carrier collection module caused by the working frequency of the submersible plunger pump is effectively solved.
(2) The invention discloses a downhole acquisition power supply device of an oil well control cabinet, which adopts a form that an acquisition module and a control module are separated into two paths for power supply, and solves the problems that the control module consumes large power and is easy to quickly exhaust the energy stored in an energy storage unit during power failure, so that the acquisition module is insufficient in power supply.
(3) The oil well control cabinet bottom hole collecting and power supply device is reasonable in structural design.
Drawings
FIG. 1 is a block diagram of the structure of the downhole collection power supply device of the oil well control cabinet of the invention;
FIG. 2 is a schematic diagram of a specific circuit structure of the downhole collection power supply device of the oil well control cabinet;
reference numerals: 1, a power supply input module; 101 a carrier isolation unit; 102 an insurance unit; 2 a first power supply module; 201 an energy storage unit; 202 a first switching power supply unit; 203 a pre-charging current-limiting unit; 3 a second power supply module; 301 a second switching power supply unit; 4 a first rectifying module; 5 a second rectifying module; 6 direct current input protection unit; 601 an anti-reverse diode; 602 protect the diode.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1-2, the power supply device for downhole collection of an oil well control cabinet comprises a power supply input module 1 and a first power supply module 2; the input end of the first power supply module 2 is connected with the output end of the power supply input module 1; the output end of the first power supply module 2 supplies power to the acquisition module; the first power supply module 2 comprises an energy storage unit 201, and the energy storage unit 201 is arranged between the output end of the first power supply module 2 and the power supply input module 1.
The acquisition module is a carrier acquisition module.
When the power supply input module 1 has a voltage input state, voltage is transmitted to the first power supply module 2 through the power supply input module 1; at this time, the energy storage unit 201 arranged in the first power supply module 2 starts to store energy, and the output end of the first power supply module 2 outputs working voltage for the acquisition module to work;
when the power supply input module 1 has no voltage input state, the energy storage unit 201 starts to discharge, and the first power supply module 2 outputs a working voltage for the acquisition module to work at the output end of the energy storage unit 201;
with the above structure, the energy storage unit 201 can store and charge energy when the power supply input module 1 has an input voltage; the energy storage unit 201 discharges to supply power to the first power supply module 2 when the power supply input module 1 has no input voltage; under the condition that the power supply input module 1 is powered off, the first power supply module 2 can still output voltage to supply the functions of the acquisition module.
Specifically, the voltage of the power supply input module 1 is derived from a tap of one phase on the submersible direct-drive screw pump; when the submersible direct-drive screw pump works normally, a tap of one phase on the submersible direct-drive screw pump supplies power to the power supply input module 1; when the submersible direct-drive screw pump is in the intermittent working period, a tap of one phase on the submersible direct-drive screw pump stops supplying power to the power supply input module 1, namely the power supply input module 1 is powered off without voltage input.
Preferably, the downhole collection power supply device of the oil well control cabinet comprises a second power supply module 3; the input end of the second power supply module 3 is connected with the output end of the power supply input module 1; and the output end of the second power supply module 3 supplies power to the control module.
The control module generally adopts a singlechip, and mainly receives the data acquired by the acquisition module and then sends the data to the well.
Because the energy storage capacity of the energy storage unit 201 is effective, that is, under the condition of power failure, the electric quantity which can be provided by the energy storage unit is limited, and the power consumption of the control module system is larger; the event adopts above-mentioned structure, sets up the power supply of second power module 3 of the same kind all the way for control module, separately supplies power with collection module and control module, prevents under the circumstances of outage, and control module consumes the electric quantity in energy storage unit 201 fast, guarantees first power module 2 can provide operating voltage for collection module all the time under the outage circumstances.
In case of power failure, the energy storage unit 201 is arranged on the first power supply module 2 because the self-resetting time of the acquisition module is longer, and the stroke time of the oil well submersible pump is very short, which can cause that the data acquired by the acquisition module can not be sent out completely, so the energy storage unit 201 is arranged;
the second power supply module 3 does not need to be provided with the energy storage unit 201 because the control module does not need to transmit data to the well in real time.
Preferably, the first power supply module 2 includes a first switching power supply unit 202, and the first switching power supply unit 202 is disposed between the energy storage module and the output end of the first power supply module 2; the second power supply module 3 includes a second switching power supply unit 202, and the second switching power supply unit 202 is disposed in front of an output terminal of the second power supply module 3.
With the above structure, the first switching power supply unit 202 converts the voltage input from the first power supply module 2 to the first switching power supply unit 202, and outputs the working voltage required by the acquisition module during operation;
the second switching power supply unit 202 converts the voltage input by the second power supply module 3 to the second switching power supply unit 202, and outputs a working voltage required by the control module during working;
specifically, the first switching power supply unit 202 and the second switching power supply unit 202 include a switching power supply chip and peripheral circuits thereof.
Preferably, the power supply input module 1 is provided with a carrier isolation unit 101.
The carrier isolation unit 101 comprises differential mode inductors L1 and L2, and is mainly used for isolating high-frequency carrier signals, placing power line carrier signals for attenuation and playing a certain filtering effect;
the carrier isolation unit 101 further includes a common mode inductor T1, which is mainly used for suppressing common mode noise.
Further, the power supply input module 1 is further provided with a safety unit 102, specifically a fuse; the protection circuit is mainly used for alternating current input protection, namely, the circuit is prevented from being overloaded and short-circuited.
Preferably, the power supply device for downhole collection of the oil well control cabinet comprises a first rectification module 4; the first rectifying module 4 is arranged at the connection position of the power supply input module 1 and the first power supply module 2.
The power supply input module 1 inputs alternating current, and the first power supply module 2 needs to output direct current; by adopting the structure, the alternating current input by the power supply input module 1 is converted into the direct current through the first rectifying module 4.
Specifically, the first rectification module 4 is a full bridge circuit formed by four diodes; the anode of the first diode is connected with the cathode of the second diode, and an alternating current input end is led out of the connection position; the anode of the second diode is connected with the anode of the third diode, and a direct current cathode output end is led out of the connection position; the cathode of the third diode is connected with the anode of the fourth diode, and an alternating current input end is led out of the connection position; the cathode of the fourth diode is connected with the cathode of the first diode, and a direct current anode output end is led out of the connection position;
an alternating current input end in the first rectifying module 4 is connected with the power supply input module 1; the output end of the direct current negative electrode is grounded; the direct current positive output end is connected with the energy storage unit 201 and the first switching power supply unit 202.
Preferably, the oil well control cabinet downhole collection power supply device comprises a second rectification module 5, and the second power supply module 3 needs to output direct current; the second rectifying module 5 is arranged at the connection position of the power supply input module 1 and the second power supply module 3.
The power supply input module 1 inputs alternating current; by adopting the structure, the alternating current input by the power supply input module 1 is converted into the direct current through the second rectifying module 5.
Specifically, the second rectification module 5 is a full-bridge circuit composed of four diodes, and the structure of the full-bridge circuit is the same as that of the first rectification module 4; the alternating current input end of the second rectifying module 5 is connected with the power supply input module 1; the output end of the direct current negative electrode is grounded; the dc positive output terminal is connected to the second switching power supply unit 202.
Preferably, a pre-charging current limiting unit 203 is arranged in front of the energy storage unit 201.
The energy storage unit 201 is specifically understood as follows: between the power supply input module 1 and the energy storage unit 201, specifically between the first rectifying module 4 and the energy storage unit 201.
The pre-charging current-limiting unit is a current-limiting resistor and is mainly used for limiting the current and preventing the service life of the energy storage unit 201 from being shortened due to overlarge instantaneous current when the energy storage unit 201 is charged.
Preferably, a dc input protection unit 6 is disposed in front of the first switching power supply unit 202.
The first switching power supply unit 202 can be understood as being between the energy storage unit 201 and the first switching power supply unit 202.
With the above structure, the dc input protection unit 6 is mainly used for protecting the input of the first switching power supply unit 202.
Preferably, a dc input protection unit 6 is disposed in front of the second switching power supply unit 202.
The second switching power supply unit 202 is specifically understood as follows: between the input end of the second power supply unit and the second switching power supply unit 202, specifically between the second rectification module 5 and the second switching power supply unit 202.
With the above structure, the dc input protection unit 6 is mainly used for protecting the input of the second switching power supply unit 202.
Preferably, the energy storage unit 201 includes two energy storage capacitors with larger capacitance; one end of the energy storage capacitor is connected with the output end of the first power supply module 2, and the other end of the energy storage capacitor is grounded.
By adopting the structure, the energy storage capacitor is used for storing energy so as to ensure that the normal power supply requirement of the acquisition module is maintained during midway power failure; specifically, two 10000UF aluminum electrolytic capacitors are adopted as the two energy storage capacitors.
Preferably, the dc input protection unit 6 includes an anti-reverse diode 601 and a protection diode 602; the anti-reverse diodes 601 in the direct current input protection unit 6 arranged in the first power supply module 2 and the second power supply module 3 are respectively connected in series before the first switching power supply unit 202 and the second switching power supply unit 202; the cathodes of the protection diodes 602 in the dc input protection units 6 of the first power supply module 2 and the second power supply module 3 are respectively connected to the first switching power supply unit 202 and the second switching power supply unit 202, and the anodes thereof are grounded.
With the above structure, the anti-reverse diode 601 is used for preventing the voltage from being reversely input into the first switching power supply unit 202 and the second switching power supply unit 202 to cause damage of components; the protection diode 602 adopts a TVS transistor, and is used for transient overload protection of the first switching power supply unit 202 and the second switching power supply unit 202.
Preferably, the second power supply module 3 is provided with a first capacitor on the input end side, one end of the first capacitor is connected with the input end of the second power supply module 3, and the other end of the first capacitor is grounded; the first capacitor is mainly used for filtering; specifically, the first capacitor adopts a 560UF aluminum electrolytic capacitor.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a power supply unit is gathered in oil well switch board shaft bottom which characterized in that: the power supply device comprises a power supply input module (1) and a first power supply module (2); the input end of the first power supply module (2) is connected with the output end of the power supply input module (1); the output end of the first power supply module (2) supplies power to the acquisition module; the first power supply module (2) comprises an energy storage unit (201), and the energy storage unit (201) is arranged between the output end of the first power supply module (2) and the power supply input module (1).
2. The well control cabinet downhole collection power supply device of claim 1, wherein: comprises a second power supply module (3); the input end of the second power supply module (3) is connected with the output end of the power supply input module (1); and the output end of the second power supply module (3) supplies power to the control module.
3. The well control cabinet downhole collection power supply device of claim 2, wherein: the first power supply module (2) comprises a first switching power supply unit (202), and the first switching power supply unit (202) is arranged between the energy storage module and the output end of the first power supply module (2); the second power supply module (3) comprises a second switching power supply unit (301), and the second switching power supply unit (301) is arranged in front of the output end of the second power supply module (3).
4. The well control cabinet downhole collection power supply device of claim 1, wherein: the power supply input module (1) is provided with a carrier isolation unit (101).
5. The well control cabinet downhole collection power supply device of claim 1, wherein: comprises a first rectifying module (4); the first rectifying module (4) is arranged at the joint of the power supply input module (1) and the first power supply module (2).
6. The well control cabinet downhole collection power supply device of claim 2, wherein: comprises a second rectifying module (5); the second rectifying module (5) is arranged at the joint of the power supply input module (1) and the second power supply module (3).
7. The well control cabinet downhole collection power supply device of claim 1, wherein: a pre-charging current-limiting unit (203) is arranged in front of the energy storage unit (201).
8. The well control cabinet downhole collection power supply device of claim 3, wherein: the first power supply module (2) comprises a direct current input protection unit (6) arranged in front of the first switching power supply unit (202); the second power supply module (3) comprises a direct current input protection unit (6) arranged in front of the second switching power supply unit (301).
9. The well control cabinet downhole collection power supply device of claim 1, wherein: the energy storage unit (201) comprises two energy storage capacitors with larger capacitance; one end of the energy storage capacitor is connected with the output end of the first power supply module (2), and the other end of the energy storage capacitor is grounded.
10. The well control cabinet downhole collection power supply device of claim 8, wherein: the direct current input protection unit (6) comprises an anti-reverse diode (601) and a protection diode (602); anti-reverse diodes (601) in a direct current input protection unit (6) arranged in the first power supply module (2) and the second power supply module (3) are respectively connected in series before the first switching power supply unit (202) and the second switching power supply unit (301); the negative electrodes of the protection diodes (602) in the direct current input protection unit (6) arranged on the first power supply module (2) and the second power supply module (3) are respectively connected with the first switching power supply unit (202) and the second switching power supply unit (301), and the positive electrodes are grounded.
CN202010767400.0A 2020-08-03 2020-08-03 Power supply unit is gathered in oil well switch board shaft bottom Pending CN111864772A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112838664A (en) * 2020-12-30 2021-05-25 广州旭杰电子有限公司 Novel high-voltage direct-current power supply device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112838664A (en) * 2020-12-30 2021-05-25 广州旭杰电子有限公司 Novel high-voltage direct-current power supply device
CN112838664B (en) * 2020-12-30 2021-11-30 广州旭杰电子有限公司 High-voltage direct-current power supply device

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