CN109286172A - A kind of novel ultralow frequency high pressure generator - Google Patents
A kind of novel ultralow frequency high pressure generator Download PDFInfo
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- CN109286172A CN109286172A CN201810782391.5A CN201810782391A CN109286172A CN 109286172 A CN109286172 A CN 109286172A CN 201810782391 A CN201810782391 A CN 201810782391A CN 109286172 A CN109286172 A CN 109286172A
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- shell
- overcurrent protector
- controller
- overcurrent
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- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/443—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means
- H02M5/45—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M5/451—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output voltage or frequency
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of novel ultralow frequency high pressure generators, including shell, the left side wall lower part of the shell is equipped with power supply port, the left and right ends of the power supply port are fixed on shell by annular fixinig plate, the electric current that the inner cavity of the shell corresponds to power supply port is equipped with the first isolation shell, photoisolator is electrically connected by controller, photoisolator is the control terminal electrical connection of thyristor, to allow the controller to the conducting and closing of control thyristor, user is greatly reduced by Phototube Coupling because of the possibility that the reasons such as electric leakage are caused danger, controller and internal structure are kept apart by the second isolation shell, to prevent internal structure from impacting to controller, internal structure is had an impact with the high pressure for stopping transformer to generate by third separation layer.Making internal structure that can cut off rapidly circuit when short circuit occurs by the first overcurrent protector, the second overcurrent protector and third overcurrent protector prevents overcurrent from causing safety accident.
Description
Technical field
The present invention relates to technical field of electric equipment, specific field is a kind of novel ultralow frequency high pressure generator.
Background technique
Present cross-linked polyethylene insulated cable gradually substitutes traditional cable in electricity transmission process, but with the poly- second of crosslinking
The aging of alkene insulated cable, insulating capacity are also gradually degenerated, and traditional DC break down voltage test not can reflect the poly- second of crosslinking
The pressure-resistant performance of alkene insulated cable, so having produced ultra-low frequency high-pressure generator now by low-frequency high-voltage to crosslinked polyethylene
Insulated cable carries out voltage-withstand test, but existing ultra-low frequency high-pressure generator holds when in use because of small volume
Easily because the damage of element leads to the danger of electric leakage in equipment, the personal safety of staff is influenced.
Summary of the invention
The purpose of the present invention is to provide a kind of novel ultralow frequency high pressure generators, to solve to propose in above-mentioned background technique
The problem of.
To achieve the above object, the invention provides the following technical scheme: a kind of novel ultralow frequency high pressure generator, including it is outer
Shell, the left side wall lower part of the shell are equipped with power supply port, and the left and right ends of the power supply port are fixed on outer by annular fixinig plate
On shell, the electric current that the inner cavity of the shell corresponds to power supply port is equipped with the first isolation shell, and the upper surface of the first isolation shell is equipped with
Through-hole, the top of the first isolation shell are equipped with rectifier, and the rectifier is left by the inner cavity of rectifier fixinig plate and shell
Side wall is connected, and the output end of the power supply port be electrically connected with the input terminal of rectifier, and the output end of the rectifier is equipped with the
One overcurrent protector, the inner cavity lower surface of the shell are from left to right successively arranged boost chopper, inverter and frequency demultiplier, institute
The upper surface for stating boost chopper is from left to right successively arranged chopper input terminal, chopper control terminal and chopper output end,
The chopper input terminal is equipped with thyristor, and the inner cavity upper surface of the shell is equipped with controller, under the controller
Surface is equipped with electric connection contact, and the quantity of the electric connection contact is 4, and the inner cavity of the shell, which corresponds to, is equipped with second at controller
Shell is isolated, the lower surface of the second isolation shell is equipped with photoisolator, PWM controller, Voltage measure and current measurer,
The photoisolator, PWM controller, Voltage measure and current measurer are electrically connected with electric connection contact, the inversion
The input terminal of device is equipped with the second overcurrent protector, and the output end of the frequency demultiplier is equipped with third overcurrent protector, the drop
The top of frequency device is equipped with transformer, and the transformer is equipped with anchor ear, one end of the anchor ear and the inner cavity upper surface phase of shell
Even, the output end of the transformer is equipped with conduit, and the conduit is stretched out out of shell, and the inner cavity of the shell is to strain
It is equipped with third at depressor, shell is isolated, the electric current that the upper surface of the shell corresponds to controller is equipped with display, adjusting knob and opens
It closes.
Preferably, the output end of the rectifier is electrically connected with thyristor, the input of the thyristor and boost chopper
End electrical connection, the output end of the boost chopper are electrically connected with the input terminal of inverter, the output end and drop of the inverter
The input terminal of frequency device is electrically connected, and the output end of the frequency demultiplier is electrically connected with the input terminal of transformer.
Preferably, the output end of the photoisolator is electrically connected with the control terminal of thyristor, the PWM controller and liter
The control terminal electrical connection of chopper is pressed, the Voltage measure and current measurer are electrically connected with the output end of boost chopper
It connects, the display, adjusting knob and switch are electrically connected with the controller.
Preferably, the main constituents of the first isolation shell, the second isolation shell and third isolation shell are that high frequency is exhausted
Edge ceramics.
The controller realizes adjustment by the detection of the current information to three overcurrent protectors, and the controller is pressed
The first fiducial value P of the first overcurrent protector, the second overcurrent protector is determined according to following mean operation formula21:
In formula, P21Indicate the first overcurrent protector, the second overcurrent protector electric current the first fiducial value, r1Indicate first
The real-time sampling value of overcurrent protector, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate third overcurrent protector
Real-time sampling value；T indicates mean square deviation operation, and I indicates integral operation；
Wherein I indicates any integral operation based on quadratic function, and above-mentioned formula is the ratio information for obtaining integral, following
Two formula are identical, are such as based on function y=ax2, it is in (a, b) in x value, a < b is any number.
The controller determines the second fiducial value of the first overcurrent protector, third overcurrent protector according to the following equation
P31:
In formula, P31Indicate the first overcurrent protector, the second overcurrent protector electric current the second fiducial value, r1Indicate first
The real-time sampling value of overcurrent protector, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate third overcurrent protector
Real-time sampling value；T indicates mean square deviation operation, and I indicates integral operation；
The controller determines the third fiducial value of the second overcurrent protector, third overcurrent protector according to the following equation
P23:
In formula, P23Indicate the third fiducial value of the second overcurrent protector, the second overcurrent protector, r1Indicate that the first overcurrent is protected
Protect the real-time sampling value of device, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate adopting in real time for third overcurrent protector
Sample value；T indicates mean square deviation operation, and I indicates integral operation；
The P obtained by aforesaid way21、P31、P23, the difference comparsion of three fiducial values is obtained, determines whether to be more than storage
In the threshold value P of controller, if having a difference is more than threshold value P, the movement of photoisolator is controlled；When resting preset later
Between after, according to the current value that formula (1) determines, overcurrent protector acts again.
Compared with prior art, the beneficial effects of the present invention are: a kind of novel ultralow frequency high pressure generator, by first every
Shrinking away from theshell can prevent power supply power supply from interfering and influencing to internal control equipment, be electrically connected photoisolator by controller,
Photoisolator is that the control terminal electrical connection of thyristor passes through to allow the controller to the conducting and closing of control thyristor
Phototube Coupling greatly reduces user because of the possibility caused danger of the reasons such as electric leakage, by the second isolation shell by controller with
Internal structure is kept apart, to prevent internal structure from impacting to controller, by third separation layer to stop transformer to produce
Raw high pressure has an impact internal structure.Pass through the first overcurrent protector, the second overcurrent protector and third overcurrent protector
Making internal structure that can cut off rapidly circuit when short circuit occurs prevents overcurrent from causing safety accident.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
In figure: shell, 4- rectifier, the first overcurrent protector of 5-, 6- is isolated in 1- shell, 2- power supply port, 3- first
Boost chopper, 7- inverter, 8- frequency demultiplier, 9- thyristor, 10- controller, 11- second be isolated shell, 12- photoelectricity every
From device, 13-PWM controller, 14- Voltage measure, 15- current measurer, the second overcurrent protector of 16-, 17- third
Overcurrent protector, 18- transformer, 19- anchor ear, 20- third isolation shell, 21- display, 22- adjusting knob, 23- are opened
It closes.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of novel ultralow frequency high pressure generator, including shell 1,
The left side wall lower part of the shell is equipped with power supply port 2, and shell is fixed on by annular fixinig plate in the left and right ends of the power supply port
On, the electric current that the inner cavity of the shell corresponds to power supply port is equipped with the first isolation shell 3, can prevent power supply from supplying by the first isolation shell
It supplies electricity to internal control equipment to interfere and influence, the upper surface of the first isolation shell is equipped with through-hole, the first isolation shell
Top be equipped with rectifier 4, by AC rectification be direct current by rectifier, the rectifier passes through rectifier fixinig plate and outer
The inner cavity left side wall of shell is connected, and the output end of the power supply port is electrically connected with the input terminal of rectifier, the output of the rectifier
End is equipped with the first overcurrent protector 5, and the first overcurrent protector is installed on rectifier prevents the excessive damage internal unit of electric current,
The inner cavity lower surface of the shell is from left to right successively arranged boost chopper 6, inverter 7 and frequency demultiplier 8, the boost chopper
The upper surface of device is from left to right successively arranged chopper input terminal, chopper control terminal and chopper output end, the chopper
Input terminal is equipped with thyristor 9, and the inner cavity upper surface of the shell is equipped with controller 10, and the lower surface of the controller is equipped with
Electric connection contact, the quantity of the electric connection contact are 4, and the inner cavity of the shell, which corresponds to, is equipped with the second isolation shell at controller
11, it controller is kept apart with internal structure prevents internal structure from impacting to controller by the second isolation shell, described the
The lower surface of two isolation shells is equipped with photoisolator 12, PWM controller 13, Voltage measure 14 and current measurer 15, described
Photoisolator, PWM controller, Voltage measure and current measurer are electrically connected with electric connection contact, the inverter
Input terminal is equipped with the second overcurrent protector 16, is prevented by the second overcurrent protector because inverter short circuit causes electric current mistake
Danger is caused greatly, and the output end of the frequency demultiplier is equipped with third overcurrent protector 17, and the top of the frequency demultiplier is equipped with transformation
Device 18, the transformer are equipped with anchor ear, fix transformer, table on one end of the anchor ear 19 and the inner cavity of shell by anchor ear
Face is connected, and the output end of the transformer is equipped with conduit, and the conduit is stretched out out of shell, the inner cavity pair of the shell
It answers and is equipped with third isolation shell 20 at transformer, the high pressure for stopping transformer to generate by third separation layer generates internal structure
It influences, the electric current that the upper surface of the shell corresponds to controller is equipped with display 21, adjusting knob 22 and switch 23.
Specifically, the output end of the rectifier is electrically connected with thyristor, the thyristor and boost chopper it is defeated
Enter end electrical connection, the output end of the boost chopper be electrically connected with the input terminal of inverter, the output end of the inverter and
The input terminal of frequency demultiplier is electrically connected, and the output end of the frequency demultiplier is electrically connected with the input terminal of transformer, can be with by thyristor
The on state between rectifier and boost chopper is controlled, the electricity for the electric current that rectifier can be passed to by boost chopper is passed through
Pressure increases, then the direct current being passed to from boost chopper is changed into alternating current by inverter, then pass through LC by frequency demultiplier
Concussion reduces power frequency, then increases voltage by transformer, is output on test cable later.
Specifically, the output end of the photoisolator is electrically connected with the control terminal of thyristor, the PWM controller with
The control terminal of boost chopper is electrically connected, and the Voltage measure and current measurer are electrically connected with the output end of boost chopper
It connects, the display, adjusting knob and switch are electrically connected with the controller, and are electrically connected photoisolator, photoelectricity by controller
Isolator is that the control terminal electrical connection of thyristor passes through control to enable the controller to the conducting and closing of control thyristor
Knob on device processed controls the step-up ratio of the adjustable boost chopper of work of PWM controller, can be shown by display
The voltage that Voltage measure and current measurer measure is shown, can stop powering to photoisolator by switch, have reached
The effect to stop working.
In the present embodiment, the controller obtains the current information of three overcurrent protectors in real time, and by comprehensive ratio
After being compared after preferably, controller controls photoisolator movement.
The controller realizes adjustment by the detection of the current information to three overcurrent protectors, and the controller is pressed
The first fiducial value P of the first overcurrent protector, the second overcurrent protector is determined according to following mean operation formula21:
In formula, P21Indicate the first overcurrent protector, the second overcurrent protector electric current the first fiducial value, r1Indicate first
The real-time sampling value of overcurrent protector, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate third overcurrent protector
Real-time sampling value；T indicates mean square deviation operation, and I indicates integral operation.
Wherein I indicates any integral operation based on quadratic function, and above-mentioned formula is the ratio information for obtaining integral, following
Two formula are identical, are such as based on function y=ax2, it is in (a, b) in x value, a < b is any number.
The rudimentary algorithm of above-mentioned mean operation are as follows: by obtaining the current value of all sampled points within a certain period of time,
Integral operation and mean square deviation operation are carried out to each value in some period, ratio is then taken, show that is compared is averaged
Value.
The controller determines the second fiducial value of the first overcurrent protector, third overcurrent protector according to the following equation
P31:
a (3)
In formula, P31Indicate the first overcurrent protector, the second overcurrent protector electric current the second fiducial value, r1Indicate first
The real-time sampling value of overcurrent protector, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate third overcurrent protector
Real-time sampling value；T indicates mean square deviation operation, and I indicates integral operation.
The controller determines the third fiducial value of the second overcurrent protector, third overcurrent protector according to the following equation
P23:
In formula, P23Indicate the third fiducial value of the second overcurrent protector, the second overcurrent protector, r1Indicate that the first overcurrent is protected
Protect the real-time sampling value of device, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate adopting in real time for third overcurrent protector
Sample value；T indicates mean square deviation operation, and I indicates integral operation.
The P obtained by aforesaid way21、P31、P23, the difference comparsion of three fiducial values is obtained, determines whether to be more than storage
In the threshold value P of controller, if having a difference is more than threshold value P, the movement of photoisolator is controlled；When resting preset later
Between after, according to the current value that formula (1) determines, overcurrent protector acts again.
Specifically, the main constituents of the first isolation shell, the second isolation shell and third isolation shell are high frequency
Insulating ceramics, the light weight of iso lantite, insulation effect are good.
Working principle: the present invention can prevent power supply power supply from interfering to internal control equipment by the first isolation shell
With influence, by rectifier by AC rectification be direct current, the first overcurrent protector is installed on rectifier prevents electric current excessive
Internal unit is damaged, photoisolator is electrically connected by controller and passes through brilliant lock to can control the conducting and closing of thyristor
Pipe can control the on state between rectifier and boost chopper, the electricity that can be passed to rectifier by boost chopper
The voltage of stream increases, and the boosting of the adjustable boost chopper of work of PWM controller is controlled by the knob on controller
Than, controller and internal structure are kept apart by the second isolation shell, thus prevent internal structure from impacting to controller, then
The direct current being passed to from boost chopper is changed into alternating current by inverter, then reduction electricity is shaken by LC by frequency demultiplier
Frequency is flowed, then voltage is increased by transformer, is output on test cable, is prevented by the second overcurrent protector because inverse later
Become device short circuit and cause that electric current is excessive to cause danger, the high pressure for stopping transformer to generate by third separation layer is to internal structure
It has an impact.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of novel ultralow frequency high pressure generator, including shell (1), it is characterised in that: the left side wall lower part of the shell (1)
Equipped with power supply port (2), the left and right ends of the power supply port (2) are fixed on shell (1) by annular fixinig plate, the shell
(1) electric current that inner cavity corresponds to power supply port (2) is equipped with the first isolation shell (3), and the upper surface of first isolation shell (3) is equipped with logical
The top in hole, first isolation shell (3) is equipped with rectifier (4), and the rectifier (4) passes through rectifier fixinig plate and shell
(1) inner cavity left side wall is connected, and the output end of the power supply port (2) is electrically connected with the input terminal of rectifier (4), the rectifier
(4) output end is equipped with the first overcurrent protector (5), and the inner cavity lower surface of the shell (1) is from left to right successively arranged liter
Chopper (6), inverter (7) and frequency demultiplier (8) are pressed, the upper surface of the boost chopper (6), which is from left to right successively arranged, cuts
Wave device input terminal, chopper control terminal and chopper output end, the chopper input terminal are equipped with thyristor (9), described outer
The inner cavity upper surface of shell (1) is equipped with controller (10), and the lower surface of the controller (10) is equipped with electric connection contact, the electricity
The quantity for connecting contact is 4, and the inner cavity of the shell (1), which correspond to, to be equipped with second shell (11) are isolated at controller (10), described the
The lower surface of two isolation shell (11) is equipped with photoisolator (12), PWM controller (13), Voltage measure (14) and current measurement
Device (15), the photoisolator (12), PWM controller (13), Voltage measure (14) and current measurer (15) with electricity
Contact electrical connection is connected, the input terminal of the inverter (7) is equipped with the second overcurrent protector (16), the frequency demultiplier (8)
Output end is equipped with third overcurrent protector (17), and the top of the frequency demultiplier (8) is equipped with transformer (18), the transformer
(18) anchor ear (19) are equipped with, one end of the anchor ear (19) is connected with the inner cavity upper surface of shell (1), the transformer (18)
Output end be equipped with conduit, the conduit is stretched out out of shell (1), and the inner cavity of the shell (1) corresponds to transformer
(18) third isolation shell (20) is equipped at, the electric current that the upper surface of the shell (1) corresponds to controller (10) is equipped with display
(21), adjusting knob (22) and switch (23).
2. a kind of novel ultralow frequency high pressure generator according to claim 1, it is characterised in that: the rectifier (4)
Output end is electrically connected with thyristor (9), and the thyristor (9) is electrically connected with the input terminal of boost chopper (6), and the boosting is cut
The output end of wave device (6) is electrically connected with the input terminal of inverter (7), and the output end of the inverter (7) is defeated with frequency demultiplier (8)
Enter end electrical connection, the output end of the frequency demultiplier (8) is electrically connected with the input terminal of transformer (18).
3. a kind of novel ultralow frequency high pressure generator according to claim 1, it is characterised in that: the photoisolator
(12) output end is electrically connected with the control terminal of thyristor (9), the control of the PWM controller (13) and boost chopper (6)
End electrical connection, the Voltage measure (14) and current measurer (15) are electrically connected with the output end of boost chopper (6), institute
Display (21), adjusting knob (22) and switch (23) is stated to be electrically connected with controller (10).
4. a kind of novel ultralow frequency high pressure generator according to claim 1, it is characterised in that: the first isolation shell
(3), the main constituents of the second isolation shell (11) and third isolation shell (20) are iso lantite.
5. a kind of novel ultralow frequency high pressure generator according to claim 1, it is characterised in that: the controller by pair
Adjustment is realized in the detection of the current information of three overcurrent protectors, and the controller determines the according to following mean operation formula
First fiducial value P of one overcurrent protector, the second overcurrent protector21:
In formula, P21Indicate the first overcurrent protector, the second overcurrent protector electric current the first fiducial value, r1Indicate the first overcurrent
The real-time sampling value of protector, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate the real-time of third overcurrent protector
Sampled value；T indicates mean square deviation operation, and I indicates integral operation；
Wherein I indicates any integral operation based on quadratic function, and above-mentioned formula is the ratio information for obtaining integral, and following two is public
Formula is identical, is such as based on function y=ax2, it is in (a, b) in x value, a < b is any number.
The controller determines the second fiducial value P of the first overcurrent protector, third overcurrent protector according to the following equation31:
In formula, P31Indicate the first overcurrent protector, the second overcurrent protector electric current the second fiducial value, r1Indicate the first overcurrent
The real-time sampling value of protector, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate the real-time of third overcurrent protector
Sampled value；T indicates mean square deviation operation, and I indicates integral operation；
The controller determines the third fiducial value P of the second overcurrent protector, third overcurrent protector according to the following equation23:
In formula, P23Indicate the third fiducial value of the second overcurrent protector, the second overcurrent protector, r1Indicate the first overcurrent protector
Real-time sampling value, r2Indicate the real-time sampling value of the second overcurrent protector；r3Indicate the real-time sampling of third overcurrent protector
Value；T indicates mean square deviation operation, and I indicates integral operation；
The P obtained by aforesaid way21、P31、P23, the difference comparsion of three fiducial values is obtained, determines whether to be more than to be stored in control
The threshold value P of device processed controls the movement of photoisolator if having a difference is more than threshold value P；It rests later the preset time
Afterwards, the current value determined according to formula (1), overcurrent protector act again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810782391.5A CN109286172B (en) | 2018-07-17 | 2018-07-17 | Novel ultralow frequency high voltage generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810782391.5A CN109286172B (en) | 2018-07-17 | 2018-07-17 | Novel ultralow frequency high voltage generator |
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| Publication Number | Publication Date |
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| CN109286172A true CN109286172A (en) | 2019-01-29 |
| CN109286172B CN109286172B (en) | 2022-05-27 |
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| CN201810782391.5A Active CN109286172B (en) | 2018-07-17 | 2018-07-17 | Novel ultralow frequency high voltage generator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4435749A (en) * | 1982-02-26 | 1984-03-06 | Thomas Industries Inc. | High frequency inverter fault protection system |
| CN2864707Y (en) * | 2005-12-16 | 2007-01-31 | 西安四方机电有限责任公司 | Ultra-low frequency high-voltage generator |
| CN207218559U (en) * | 2017-10-10 | 2018-04-10 | 三峡大学 | 0.1Hz ultra-low frequency high-pressure generating means |
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2018
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4435749A (en) * | 1982-02-26 | 1984-03-06 | Thomas Industries Inc. | High frequency inverter fault protection system |
| CN2864707Y (en) * | 2005-12-16 | 2007-01-31 | 西安四方机电有限责任公司 | Ultra-low frequency high-voltage generator |
| CN207218559U (en) * | 2017-10-10 | 2018-04-10 | 三峡大学 | 0.1Hz ultra-low frequency high-pressure generating means |
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| CN109286172B (en) | 2022-05-27 |
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