CN109256993A - A kind of underground digital power system - Google Patents
A kind of underground digital power system Download PDFInfo
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- CN109256993A CN109256993A CN201811383851.3A CN201811383851A CN109256993A CN 109256993 A CN109256993 A CN 109256993A CN 201811383851 A CN201811383851 A CN 201811383851A CN 109256993 A CN109256993 A CN 109256993A
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- 239000002002 slurry Substances 0.000 claims abstract description 61
- 230000006698 induction Effects 0.000 claims abstract description 20
- 239000004065 semiconductor Substances 0.000 claims description 34
- 230000005611 electricity Effects 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 2
- 230000006870 function Effects 0.000 claims 2
- 230000008878 coupling Effects 0.000 abstract description 5
- 238000010168 coupling process Methods 0.000 abstract description 5
- 238000005859 coupling reaction Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 230000003534 oscillatory effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 206010037660 Pyrexia Diseases 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 238000009955 starching Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
- H02P9/105—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load for increasing the stability
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides a kind of underground digital power system, including slurry generator and connect the rectification module in the output end of slurry generator, the rectification module exports after the induction alternating current that slurry generator generates is converted to rectified current, further include: compensated waving switch is connected when the voltage amplitude of the induction alternating current of slurry generator output is more than preset range；Power termination, the output end through compensated waving switch connection rectification module to be connected.In the rotor and asynchronous turbo blade of slurry generator, the voltage amplitude of the induction alternating current of slurry generator output is not within the scope of preset voltage amplitude, compensated waving switch conduction at this time, so that in the rectified current access power load of rectification module output, the dynamic load of slurry generator is instantly increased at this time, so that the revolving speed of rotor instantaneously reduces, rotor tends to stablize, then turbo blade drives rotor to improve revolving speed by magnetic coupling, and turbo blade can tend to synchronous with rotor in the process.
Description
Technical field
The present invention relates to digital power field, in particular to a kind of underground digital power system.
Background technique
Measurement while-drilling instrument is widely used in oil and gas development, is mainly used for measurement assessment hydrocarbon formations and control drilling well
Track.It is now mainly powered using battery or slurry generator to measurement while-drilling instrument, will lead to well since the capacity of battery is limited
The working time of lower instrument is restricted, and powers at present usually using slurry generator to measurement while-drilling instrument.
Slurry generator provides induction alternating current, then after the induction alternating current is converted into direct current by DC conversion power
It powers to measurement while-drilling instrument, detailed process is as follows: mud hair for the specific structure and offer induction alternating current of slurry generator
Motor includes turbo blade, rotor, stator coil and two groups of magnet, wherein one group of magnet is fixedly connected with turbo blade, it is another
Group magnet is connect with rotor, and rotor is located in stator coil；Down-hole slurry flowing rotates the turbo blade of slurry generator, then
The magnet being fixedly connected with turbo blade also rotates with, and the magnet of rotation drives another group and the fixed company of rotor by magnetic coupling
The magnet rotation connect, then rotor can rotate in the stator coils, so that slurry generator generates induction alternating current.Usual mud
The stator coil of slurry generator can be coiled into three groups, so that slurry generator exports three-phase alternating current, the electricity of three-phase alternating current
Pressure depends on the flow velocity and load current of mud.
Since the rotor of slurry generator is to be driven to rotate by magnetic coupling by turbo blade, if mud speed rate is unstable
Or load current is widely varied, then will lead to turbo blade rotary speed unstabilization and determine, cause to occur between rotor and turbo blade non-
Synchronia.If asynchronous between rotor and turbo blade be more than to a certain degree, slurry generator will appear it is de- carry phenomenon,
Turbo blade will appear destructive high speed rotation at this time, and rotor will appear sometimes fast and sometimes slow unstable rotation, at this time mud
Generator will do it not repairable shutdown to protect turbo blade and rotor.To enable mud after slurry generator is shut down
Slurry generator is resumed work, then needs to be again started up slurry generator after making mud stop flowing.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of digital power systems, rotor and whirlpool in slurry generator
After non-synchronization occurs in impeller blade, it is avoided that this is asynchronous more than to a certain degree, is carried so that slurry generator appearance be avoided to take off
Phenomenon.
In order to solve the above technical problems, the present invention provides a kind of underground digital power system, including slurry generator and connect
In the rectification module of the output end of slurry generator, the rectification module is converted to the induction alternating current that slurry generator generates
It is exported after rectified current, further includes:
Waved switch is connected when the voltage amplitude of the induction alternating current of slurry generator output is more than preset range；
Power termination, the output end through waved switch connection rectification module to be connected.
Preferably, including sequentially connected signal acquisition module, controller and compensation PWM module, the compensation PWM module
Waved switch is connected, the output end of the signal acquisition module connection slurry generator is believed with the voltage for obtaining induction alternating current
Number, the controller includes memory and processor, and the memory is stored with computer program, and the computer program is located
Reason device can be realized following steps when executing: the voltage signal of induction alternating current of the reception from signal acquisition module, and according to
Whether within a preset range the voltage signal judges the voltage amplitude of the induction alternating current, if judging the induction exchange
The voltage amplitude of electricity within a preset range, does not then control compensation PWM module output pwm pulse to drive compensated waving switch to lead
It is logical.
Preferably, the signal acquisition module is also connected with power termination to obtain the power signal of power termination, the meter
Calculation machine program can also perform the steps of after compensated waving switch conduction when being executed by processor, and reception is adopted from signal
Collect module power termination power signal, and according to the power signal judge the power termination power whether be greater than it is pre-
If power threshold, if judging, the power of the power termination is greater than predetermined power threshold value, controls compensation PWM module and does not export
Pwm pulse is to close compensated waving switch.
Preferably, including sequentially connected main PWM module, main waved switch and filter circuit, the main PWM module connect
Controller, the output end of the main waved switch connection rectification module, the mud power generation under main waved switch on state
The alternating current of machine output becomes direct current after rectification module and filter circuit, and the signal acquisition module connects filter circuit
Output end to obtain the voltage signal and current signal of the direct current, the computer program can also when being executed by processor
It enough performs the steps of under main waved switch on state, receives the voltage signal of the direct current from signal acquisition module
And current signal, and according to the voltage signal judge the direct current whether over-voltage, according to the current signal judgement described in
Direct current whether overcurrent, if judging the direct current over-voltage and/or overcurrent, control main PWM module do not export pwm pulse with
Close main waved switch.
Preferably, including sequentially connected main PWM module, main waved switch and filter circuit, the main PWM module connect
Controller, the main waved switch connect the output end in rectification module, the mud power generation under main waved switch on state
The alternating current of machine output becomes direct current after rectification module and filter circuit, and the signal acquisition module connects filter circuit
Output end to obtain the voltage signal of the direct current, can also be realized when the computer program is executed by processor following
Step: under main waved switch on state, the voltage signal of the direct current from signal acquisition module is received, and according to described
Voltage signal judges whether over-voltage controls main PWM module and do not export the direct current if judging the direct current over-voltage
Pwm pulse is to close main waved switch.
Preferably, including sequentially connected main PWM module, main waved switch and filter circuit, the main PWM module connect
Controller, the main waved switch connect the output end in rectification module, the mud power generation under main waved switch on state
The alternating current of machine output becomes direct current after rectification module and filter circuit, and the signal acquisition module connects filter circuit
Output end to obtain the current signal of the direct current, can also be realized when the computer program is executed by processor following
Step: under main waved switch on state, the current signal of the direct current from signal acquisition module is received, and according to described
Current signal judges whether overcurrent controls main PWM module and do not export the direct current if judging the direct current overcurrent
Pwm pulse is to close main waved switch.
Preferably, including afterflow PWM module interconnected and afterflow waved switch, the afterflow PWM module connection control
Device processed, the afterflow waved switch connect the filter circuit, can also realize when the computer program is executed by processor
Following steps: after the closing of main waved switch, control afterflow PWM module output pwm pulse is to be connected afterflow waved switch.
Preferably, the filter circuit includes inductance and capacitor, and described inductance one end connects main waved switch, and the other end connects
Connect power output end, the contact between capacitor one end connection inductance and power output end, other end ground connection.
Preferably, afterflow waved switch one end connects the contact between main waved switch and inductance, other end connection
The ground terminal of capacitor.
Preferably, the waved switch is metal-oxide-semiconductor.
Preferably, the controller is microprocessor.
The invention has the following advantages: if occurring between the rotor and turbo blade of slurry generator asynchronous existing
As then slurry generator has the de- hidden danger carried, and the voltage signal of the induction alternating current of slurry generator output at this time will appear
Violent oscillatory motion, in slurry generator work, if the voltage amplitude of the induction alternating current of slurry generator output is not default
Voltage amplitude within the scope of, then mean occur asynchrony phenomenon between the rotor of slurry generator and turbo blade, mend at this time
Waved switch conducting is repaid, so that in the rectified current access power load of rectification module output, therefore the dynamic of slurry generator is negative
Load is instantly increased, so that the revolving speed of rotor instantaneously reduces, after the revolving speed of rotor reduces, rotor can tend to stable, then turbine
Blade drives rotor to improve revolving speed by magnetic coupling, and turbo blade can tend to synchronous with rotor in the process, to avoid whirlpool
Occurs de- load phenomenon between impeller blade and rotor.
Detailed description of the invention
Fig. 1 is the circuit structure block diagram of underground digital power system.
Description of symbols: 1- slurry generator；2- three phase rectifier module；3- signal acquisition module；4- microprocessor；5-
Main PWM module；6- compensates PWM module；7- afterflow PWM module；The main metal-oxide-semiconductor of 8-；9- compensates metal-oxide-semiconductor；10- afterflow metal-oxide-semiconductor；11-
Power resistor；12- inductance；13- capacitor.
Specific embodiment
As shown in Figure 1, underground digital power include slurry generator 1, it is three phase rectifier module 2, signal acquisition module 3, micro-
Processor 4, main PWM module 5, compensation PWM module 6, afterflow PWM module 7, main metal-oxide-semiconductor 8, compensation metal-oxide-semiconductor 9, afterflow metal-oxide-semiconductor 10,
Power resistor 11, inductance 12 and capacitor 13.
In the present embodiment, the stator coil of slurry generator 1 is coiled into three groups, so that slurry generator 1 exports three-phase
Alternating current.Slurry generator 1 connects main metal-oxide-semiconductor 8 through three phase rectifier module 2, and the three-phase alternating current that slurry generator 1 generates passes through
Three phase rectifier electricity is obtained after three phase rectifier module 2.Signal acquisition module 3, microprocessor 4, main PWM module 5, main metal-oxide-semiconductor 8 and electricity
Sense 12 is sequentially connected, and main metal-oxide-semiconductor 8 connects the output end of three phase rectifier module 2, and inductance 12 connects power output end, measurement while drilling
Instrument connects in power output end, and the contact between the inductance 12 and power output end is grounded through capacitor 13, inductance 12 and capacitor
13 composition LC filter circuits, then the three phase rectifier electricity that three phase rectifier module 2 exports are converted after main metal-oxide-semiconductor 8 and LC filter circuit
For direct current, signal acquisition module 3 connects the output end of LC filter circuit to obtain the voltage signal of the direct current and electric current letter
Number.Microprocessor 4 is also connected with afterflow PWM module 7, and afterflow PWM module 7 connects afterflow metal-oxide-semiconductor 10, and 10 one end of afterflow metal-oxide-semiconductor connects
The contact between main metal-oxide-semiconductor 8 and inductance 12 is connect, the other end connects the ground terminal of capacitor 10.
The three-phase alternating current that slurry generator 1 exports obtains three phase rectifier electricity after the rectification of three phase rectifier module 2, in master
Under 8 on state of metal-oxide-semiconductor, which obtains direct current after the filtering of LC filter circuit, which exports from power supply
End output.Under main metal-oxide-semiconductor on state, signal acquisition module 3 obtains the voltage signal and current signal of the direct current, then
The voltage signal and current signal that get are transmitted to microprocessor 4, be preset in microprocessor 4 voltage threshold (such as
40V) and current threshold (such as 6A), microprocessor 4 judge whether the voltage of the direct current is greater than according to the voltage signal
Preset voltage threshold, that is, judge the direct current whether over-voltage, the electric current of the direct current is judged according to the current signal
Whether be greater than current threshold, that is, judge the direct current whether overcurrent.If microprocessor 4 judges the direct current over-voltage or mistake
Stream, or judge the direct current over-voltage and overcurrent, then microprocessor 4 controls main PWM module 5 and does not export pwm pulse to close
Main metal-oxide-semiconductor 8 is damaged to avoid connecing in the measurement while-drilling instrument of power output end.
After the closing of main metal-oxide-semiconductor 8, inductance 12 and three phase rectifier module 2 are disconnected, i.e., do not have three phase rectifier electricity defeated in inductance 12
Enter, but due to the characteristic of inductance 12, the electric current of inductance 12 will not change immediately, microprocessor 4 controls afterflow PWM module 7 at this time
Output pwm pulse is to drive afterflow metal-oxide-semiconductor 10 to be connected, and afterflow metal-oxide-semiconductor 10 can then play the role of afterflow after switch, to protect
Main metal-oxide-semiconductor 8 is not breakdown.
Signal acquisition module 3 is also connected with the output end of slurry generator 1, and microprocessor 4 is also connected with compensation PWM module 6, mends
It repays PWM module 6, compensation metal-oxide-semiconductor 9 and power resistor 11 to be sequentially connected, power resistor 11 is grounded.
When slurry generator 1 exports three-phase alternating current, signal acquisition module 3 obtains the three-phase that slurry generator 1 exports
The voltage signal of alternating current, and the voltage signal got is transmitted to microprocessor 4.When slurry generator 1 works normally,
Do not occur asynchrony phenomenon between its rotor and turbo blade, compensates metal-oxide-semiconductor 9 at this time and be in an off state.If mud generates electricity
There is asynchrony phenomenon between the rotor and turbo blade of machine 1, then slurry generator 1 has the de- hidden danger carried, and mud is sent out at this time
The voltage signal for the three-phase alternating current that motor 1 exports will appear violent oscillatory motion.Voltage amplitude range is preset in microprocessor 4
(such as 200V), when slurry generator 1 works, microprocessor 4 is according to the electricity of the three-phase alternating current from signal acquisition module 3
Pressure signal judge the voltage amplitude of the three-phase alternating current whether within the scope of preset voltage amplitude, specifically:
If the voltage amplitude of three-phase alternating current is not within the scope of preset voltage amplitude, then it represents that slurry generator 1 turns
Occurs asynchrony phenomenon between son and turbo blade, slurry generator 1 has the de- hidden danger carried, and the control of microprocessor 4 at this time is mended
It repays the output pwm pulse of PWM module 6 and compensates metal-oxide-semiconductor 9 to be connected, power resistor 11 and three phase rectifier after compensation metal-oxide-semiconductor 9 is connected
Module 2 connects, then three phase rectifier electricity is input to power resistor 11, then the load instantaneous of slurry generator 1 increases, so that rotor
Revolving speed instantaneously reduces, and after the revolving speed of rotor reduces, rotor will tend to stable, and then turbo blade passes through magnetic coupling band turn
Son improves revolving speed, and turbo blade is synchronous with rotor trend in the process, to avoid taking off between turbo blade and rotor
Carry phenomenon；
Compensation metal-oxide-semiconductor 9 be connected after, if the voltage amplitude of three-phase alternating current within the scope of preset voltage amplitude, table
Show between the rotor and turbo blade of slurry generator 1 asynchrony phenomenon do not occur, the compensation of the control of microprocessor 4 at this time PWM
Module 6 does not export pwm pulse, so that compensation metal-oxide-semiconductor 9 is closed, power resistor 11 and three phase rectifier after compensation metal-oxide-semiconductor 9 disconnects
Module 2 disconnects, then three phase rectifier electricity is not input to power resistor 11, then the load instantaneous of slurry generator 1 reduces, so that rotor
Revolving speed instantaneously increase.
Moment is connected in compensation metal-oxide-semiconductor 9, power resistor 11 accesses unstable three phase rectifier electricity, therefore power resistor 11
May power it is excessive and lead to itself excessive heating.In high temperature subsurface environment, 11 excessive heating of power resistor will lead to electricity
Subcomponent, as the performance of inductance, capacitor can be deteriorated, it is therefore desirable to the conducting of limitation compensation metal-oxide-semiconductor 9.It is preset in microprocessor 4
Power threshold (such as 50W), signal acquisition module 3 connect power resistor 11 to obtain the power signal of power resistor 11, micro- place
It manages device 4 and judges whether the power of power resistor 11 is greater than preset power-threshold according to the power signal from signal acquisition module 3
Value, if the power of power resistor 11 be greater than preset power threshold, mean power resistor may excessive heating cause from
Body temperature is excessively high, even if three-phase alternating current is not stable at this time, microprocessor 4 can also control compensation PWM module 6 and not export PWM
Pulse to close compensation metal-oxide-semiconductor 9 by force, so that power resistor 11 and three phase rectifier module 2 disconnect to avoid 11 mistake of power resistor
Degree fever.
The turn-on time of power resistor 12 is adjusted by proportional-integral-differential (PID) until keeping mud by microprocessor 4
Starch the voltage amplitude of induction alternating current of generator output within a preset range.The control is a Design of Closed-Loop Control, with mud
The voltage amplitude for starching generator is controlled plant, and the input variable of control is obtained by an independent signal acquisition module 3, is acquired
Signal includes the power signal of the voltage signal of three-phase alternating current, the voltage signal of direct current, circuit current and power resistor, defeated
It is the pwm signal of control compensation metal-oxide-semiconductor 9 out.It can be in view of the response delay of PID, at the beginning of conducting compensation metal-oxide-semiconductor 9
It is located at when the voltage of the three-phase alternating current of slurry generator output rises to close to peak value.
Claims (10)
1. a kind of underground digital power system including slurry generator and connects the rectification module in the output end of slurry generator,
The rectification module exports after the induction alternating current that slurry generator generates is converted to rectified current, it is characterised in that further include:
Compensated waving switch is connected when the voltage amplitude of the induction alternating current of slurry generator output is more than preset range；
Power termination, the output end through compensated waving switch connection rectification module to be connected.
2. digital power system in underground according to claim 1, it is characterised in that: including sequentially connected signal acquisition mould
Block, controller and compensation PWM module, the compensation PWM module connection compensated waving switch, the signal acquisition module connect mud
The output end of generator is starched to obtain the voltage signal of induction alternating current, the controller includes memory and processor, described
Memory is stored with computer program, and the computer program can be realized following steps when being executed by processor: reception comes from
The voltage signal of the induction alternating current of signal acquisition module, and the voltage for incuding alternating current is judged according to the voltage signal
Within a preset range whether, if judging, the voltage amplitude for incuding alternating current within a preset range, does not control benefit to amplitude
PWM module output pwm pulse is repaid to drive compensated waving switch conduction.
3. digital power system in underground according to claim 2, it is characterised in that: the signal acquisition module is also connected with function
Rate is loaded to obtain the power signal of power termination, and following step can also be realized when the computer program is executed by processor
It is rapid: after compensated waving switch conduction, to receive the power signal of the power termination from signal acquisition module, and according to the function
Rate signal judges whether the power of the power termination is greater than predetermined power threshold value, if judging, the power of the power termination is big
In predetermined power threshold value, then controls compensation PWM module and do not export pwm pulse to close compensated waving switch.
4. digital power system in underground according to claim 2, it is characterised in that: including sequentially connected main PWM module,
Main waved switch and filter circuit, the main PWM module connect controller, the output of the main waved switch connection rectification module
End, the alternating current of the slurry generator output becomes after rectification module and filter circuit under main waved switch on state
At direct current, the signal acquisition module connects the output end of filter circuit to obtain the voltage signal and electric current of the direct current
Signal can also be performed the steps of under main waved switch on state when the computer program is executed by processor, be connect
The voltage signal and current signal of the direct current from signal acquisition module are received, and the direct current is judged according to the voltage signal
Electricity whether over-voltage, according to the current signal judge the direct current whether overcurrent, if judge the direct current over-voltage and/or
Overcurrent then controls main PWM module and does not export pwm pulse to close main waved switch.
5. digital power system in underground according to claim 2, it is characterised in that: including sequentially connected main PWM module,
Main waved switch and filter circuit, the main PWM module connect controller, and the main waved switch connects the output in rectification module
End, the alternating current of the slurry generator output becomes after rectification module and filter circuit under main waved switch on state
At direct current, the output end of signal acquisition module connection filter circuit is described to obtain the voltage signal of the direct current
Computer program can also be performed the steps of when being executed by processor under main waved switch on state, received next self-confident
The voltage signal of the direct current of number acquisition module, and according to the voltage signal judge the direct current whether over-voltage, if judgement
The direct current over-voltage out then controls main PWM module and does not export pwm pulse to close main waved switch.
6. digital power system in underground according to claim 2, it is characterised in that: including sequentially connected main PWM module,
Main waved switch and filter circuit, the main PWM module connect controller, and the main waved switch connects the output in rectification module
End, the alternating current of the slurry generator output becomes after rectification module and filter circuit under main waved switch on state
At direct current, the output end of signal acquisition module connection filter circuit is described to obtain the current signal of the direct current
Computer program can also be performed the steps of when being executed by processor under main waved switch on state, received next self-confident
The current signal of the direct current of number acquisition module, and according to the current signal judge the direct current whether overcurrent, if judgement
The direct current overcurrent out then controls main PWM module and does not export pwm pulse to close main waved switch.
7. according to underground digital power system described in claim 4,5 or 6, it is characterised in that: including afterflow interconnected
PWM module and afterflow waved switch, the afterflow PWM module connect controller, and the afterflow waved switch connects the filtering
Circuit can also be performed the steps of when the computer program is executed by processor after the closing of main waved switch, and control is continuous
PWM module output pwm pulse is flowed so that afterflow waved switch is connected.
8. digital power system in underground according to claim 7, it is characterised in that: the filter circuit includes inductance and electricity
Hold, described inductance one end connects main waved switch, and the other end connects power output end, capacitor one end connection inductance and power supply
Contact between output end, other end ground connection.
9. digital power system in underground according to claim 8, it is characterised in that: the connection of afterflow waved switch one end
Contact between main waved switch and inductance, the other end connect the ground terminal of capacitor.
10. digital power system in underground according to claim 2, it is characterised in that: the waved switch is metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383851.3A CN109256993B (en) | 2018-11-20 | Underground digital power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811383851.3A CN109256993B (en) | 2018-11-20 | Underground digital power supply system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109256993A true CN109256993A (en) | 2019-01-22 |
| CN109256993B CN109256993B (en) | 2024-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436767A (en) * | 2020-11-12 | 2021-03-02 | 漳州科华技术有限责任公司 | Voltage control method, system and device and vehicle-mounted converter |
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|---|---|---|---|---|
| CN102647138A (en) * | 2012-04-20 | 2012-08-22 | 中国海洋石油总公司 | Rectifying voltage-stabilizing power supply device for underground turbine generator |
| CN102801147A (en) * | 2012-02-23 | 2012-11-28 | 金华市精工工具制造有限公司 | Over-voltage suppression device for generator unit |
| CN105450003A (en) * | 2016-01-13 | 2016-03-30 | 中国石油集团渤海钻探工程有限公司 | Stabilized voltage power supply vibration damping circuit |
| CN107591789A (en) * | 2017-10-20 | 2018-01-16 | 陕西航空电气有限责任公司 | A kind of three phase variable frequency alternating current power-generating system over-voltage suppression device |
| CN107783196A (en) * | 2017-11-22 | 2018-03-09 | 中国地质大学（武汉） | A kind of Transient Electromagnetic Apparatus emitter |
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801147A (en) * | 2012-02-23 | 2012-11-28 | 金华市精工工具制造有限公司 | Over-voltage suppression device for generator unit |
| CN102647138A (en) * | 2012-04-20 | 2012-08-22 | 中国海洋石油总公司 | Rectifying voltage-stabilizing power supply device for underground turbine generator |
| CN105450003A (en) * | 2016-01-13 | 2016-03-30 | 中国石油集团渤海钻探工程有限公司 | Stabilized voltage power supply vibration damping circuit |
| CN107591789A (en) * | 2017-10-20 | 2018-01-16 | 陕西航空电气有限责任公司 | A kind of three phase variable frequency alternating current power-generating system over-voltage suppression device |
| CN107783196A (en) * | 2017-11-22 | 2018-03-09 | 中国地质大学（武汉） | A kind of Transient Electromagnetic Apparatus emitter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112436767A (en) * | 2020-11-12 | 2021-03-02 | 漳州科华技术有限责任公司 | Voltage control method, system and device and vehicle-mounted converter |
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