CN109982497A - A kind of control system and method for tockmark Ohmic heating coil current - Google Patents
A kind of control system and method for tockmark Ohmic heating coil current Download PDFInfo
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- CN109982497A CN109982497A CN201711448697.9A CN201711448697A CN109982497A CN 109982497 A CN109982497 A CN 109982497A CN 201711448697 A CN201711448697 A CN 201711448697A CN 109982497 A CN109982497 A CN 109982497A
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- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
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Abstract
The invention belongs to the electric power supply control system technical fields of tockmark Ohmic heating coil, and in particular to a kind of control system and method for tockmark Ohmic heating coil current；Ohmic heating coil is powered using two 3-phase power converter (F1, F2) antiparallel circuit structures, powers using controllable switch K1 control forward loop power supply K2 control return circuit while increasing circulation monitoring and realize that circulation is controllable；By using real-time LINUX as the real-time acquisition control and feedback control system of operating system, with the data communication system that high speed reflective memory is constituted, while use GPS time synchronously completes the accurate control of system internal clock uniformly realized to two 3-phase power converters F1 and F2；Current fluctuation caused by reducing electric current reversely to the magnetizing of Ohmic heating coil, the operation of inversion and controllable circulation may be implemented in the present invention, improves the quality and effect of the control of tockmark plasma.
Description
Technical field
The invention belongs to the electric power supply control system technical fields of tockmark Ohmic heating coil, and in particular to a kind of support gram
The control system and method for mark's Ohmic heating coil current.
Background technique
Tockmark device be stable magnetic field is generated by variable-current come constrain and control the electric current of plasma and
Position shape.Ohmic heating coil climbs and maintains to play decision in plasma current in breakdown plasma during plasma discharge
Property effect.Plasma current can cause the unstability of plasma current because of the current fluctuation of Ohmic heating coil, stable
Ohmic heating coil power supply and zero passage are to realizing that stable plasma electric flow control has considerable meaning.Therefore it needs to set
Good control system and control method are counted to obtain good control effect.
Since tockmark device Ohmic heating coil self-operating mode is more complicated relatively difficult plus current control,
The current control of Ohmic heating coil is generally undesirable at present.The control system and control mode of current Ohmic heating coil are substantially
There are following several forms: electric power supply control system being fed back with the H bridge type that single-chip microcontroller or dsp chip are constituted, with Windows or DOS structure
At 3-phase power converter aspergillus ficuum Mode Feedback electric power supply control system and the 3-phase power converter circulation patterns that is constituted with real-time Linux
Feed back electric power supply control system.The H bridge type electric power supply control system constituted with single-chip microcontroller or DSP is most widely used in three while skill
Art comparative maturity, but the disadvantages of there are the uncontrollable disadvantage of electric current under circulation state and poor system rejection to disturbance abilities.With
There are time current crosses zeros not to know for the 3-phase power converter aspergillus ficuum mode power control system that Windows or DOS is constituted, simultaneously
Plasma current is easily caused to fluctuate and control time delay.There is circulation patterns with the 3-phase power converter that real-time Linux system is constituted
Stability and controllable circulation patterns of the electric power supply control system using bidirectional converter power supply, realize the electric current of Ohmic heating coil
Accurate control.Additionally due to use real-time control system reduce control system during Ohmic heating coil power supply when
Between postpone, enhance coil power supply efficiency and safety.
Summary of the invention
The purpose of the present invention is to provide the control systems and method of a kind of tockmark Ohmic heating coil current, solve
The problem of time current crosses zero in existing control system is uncontrollable, circulation patterns operation and control time delay.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
A kind of real-time control system of tockmark Ohmic heating coil current of the present invention, the control system add including ohm
Heat coil current supply circuit, real-time controller, reflective memory card, angle of flow computer, GPS clock and house dog；
Ohmic heating coil power supply circuit is Ohmic heating coil power supply, and real-time controller and Ohmic heating coil supply
Electrical circuit electrical connection, real-time controller, reflective memory card, angle of flow computer, GPS clock and house dog serial communication；
The real-time controller acquires the Ohmic heating coil current and target that electric current passes through acquisition in resistance winding in real time
Electric current controls angle of flow needed for calculating by angle of flow computer；Angle of flow computer is completed by reflective memory
Real-time Data Transmission；
The real-time controller timing sends the operation conditions of 1 millisecond pulse real time monitoring control system to house dog；
The GPS clock for control system provide 10M accurate clock with meet Ohmic heating coil magnetize and it is inverse
To the accuracy requirement of time and clock during change, control system time delay is reduced.
Ohmic heating coil power supply circuit includes generator, AC transformer, forward conduction switch K1, negative sense conducting
Switch K2, three-phase Forward Converter F1 and three-phase inverted converter F2；Generator is connect with AC transformer, and AC transformer is logical
Cross forward conduction switch K1 and negative sense conducting switch K2, the reversed unsteady flow of three-phase Forward Converter F1 and three-phase connecting with inverse parallel
Device F2 connection, the three-phase Forward Converter F1 and three-phase inverted converter F2 of inverse parallel connection are connect with Ohmic heating coil, right
Ohmic heating coil is powered.
The real-time controller drives analog acquisition card and digital collection by operating system of real-time LINUX, delicate with 200
The coil current and switching signal of acquisition Ohmic heating coil in real time；The real-time controller is calculated by Real-time Feedback operation
The angle of flow of forward conduction switch K1 and negative sense conducting switch K2, and angle of flow computer is transferred to by reflective memory, it leads
By generating, corresponding pulse control signal controls forward conduction switch K1 to current flow angle degree computer and switch K2 conducting is connected in negative sense
Realize the current control of Ohmic heating coil.
The Real-time Feedback operation, which is changed using plasma control algolithm and PID controller according to real-time plasma information, to be counted
Calculate the angle of flow of forward conduction switch K1 and negative sense conducting switch K2.
The method that a kind of pair of tockmark heating coil current is controlled, method includes the following steps:
Step 1: real-time controller acquires the current value on Ohmic heating coil current sensor in real time；
Step 2: real-time controller coupling coil control current target value and plasma electric flow control target value, anti-in real time
Feedback calculates the angle of flow of forward conduction switch K1 and negative sense conducting switch K2, while sending interrupts to angle of flow computer；
Step 3: checking the reasonability of the angle of flow in real time after angle of flow computer receives interruption and generating corresponding
Control sequential pulse；
Step 4: being carried out using control sequential pulse control Ohmic heating coil power supply circuit to Ohmic heating coil positive
Electric current magnetizes, and carries out inversion actions after the completion of magnetizing, and the electric current in Ohmic heating coil, which declines rapidly, at this time generates high-intensity magnetic field ring
Border completes the breakdown of plasma and climbs, and when subsequent forward current gradually decreases to certain value, opens negative sense conducting switch in real time
K2 simultaneously reverse current start to increase, with reverse current gradually increase continue to plasma flat-top and decline to
Complete primary complete plasma discharge.
The step 4 is further comprising the steps of: according to default resistance winding target current IGoal-selling resistance winding electric currentWith adopt in real time
The Ohmic heating coil current I of collectionAcquisition resistance winding electric current in real time, with coil current difference DELTA I between the twoCurrent differentialEstablish PID/feedback control
System calculates control adjustment amount；
Default resistance winding target current IGoal-selling resistance winding electric currentThe Ohmic heating coil current acquired in real time
IAcquisition resistance winding electric current in real timeIt calculates are as follows:
ΔICurrent differential=IGoal-selling resistance winding electric current-IAcquisition resistance winding electric current in real time (1)
PID/feedback control calculates single voltage and adjusts variable are as follows:
ΔUResistance winding voltage adjustment amount=PID (Δ ICurrent differential) (2)
Calculating Ohmic heating coil voltage adjustment amount, which is controlled, according to PID/feedback calculates the positive three-phase unsteady flow for needing to change
The conducting controlling angled a of device F1JustThe electric current Real-time Feedback that magnetizes that Ohmic heating coil is realized in three-phase Forward Converter F1 rectification is controlled,
The electric current in Ohmic heating coil is set gradually to arrive predetermined target value；
Control three-phase Forward Converter F1 conducting, which carries out inversion actions, makes electric current in coil decline the biggish sense of appearance rapidly
It answers electric current to realize breakdown plasma and climb, 90 ° < α is used in Ohmic heating coil reversalsJust< 120 ° are used as inversion control
Angle processed is controlled.
The step 4 is further comprising the steps of: as plasma current IPReal-time control system controls three-phase when greater than 50KA
Forward Converter F1 stops inversion actions, while being switched to IPCurrent feedback operational, detailed process are as follows:
According to goal-selling plasma current IP presets plasma currentWith the device plasma current of real-time system acquisition
IP acquires plasma current in real timeDifference DELTA I between the twoP current differentialIt establishes PID/feedback control and calculates the three-phase Forward Converter for needing to change
The angle of flow of F1 realizes the electric current of Ohmic heating coil by plasma current IPFeedback control plasma current gradually reach it is flat
Top.
The step 4 is further comprising the steps of: with IPThe continuation of current feedback process, ohm forward current gradually subtract
It is small to arrive 1KA, in order to maintain plasma current IPControl, three-phase inverted converter K2, at this time three-phase Forward Converter F1 is connected
Circulation operating mode is constituted with three-phase inverted converter F2；
Under circulation operating mode, three-phase Forward Converter F1 and three-phase inverted converter F2 mono- work shape in inversion
State another be in rectification state and control inverter voltage and rectified voltage is equal withstands rectified voltage with inverter voltage.
Increase circulation monitoring in the circuit of three-phase Forward Converter F1 and three-phase inverted converter F2, when circulation is excessive
Using αJust+αIt is negativeThe control of 180 ° of > progress circulation sizes, αJust、αIt is negativeRespectively three-phase Forward Converter F1 and three-phase inverted converter
The angle of flow of F2；Making inverter voltage a little higher than rectified voltage cannot between three-phase Forward Converter F1 and three-phase inverted converter F2
Form biggish circulation；When negative current is greater than 1KA, disconnects forward conduction switch K1 and closes three-phase Forward Converter F1,
Ohmic heating coil current is realized by just to negative smooth conversion.
The step 4 is further comprising the steps of: when Ohmic heating coil is powered by three-phase inverted converter F2, Europe
When negative current increases in nurse heating coil, plasma I is utilizedPCurrent feedback maintains plasma current flat-top, with feedback procedure
The negative current of carry out Ohmic heating coil be gradually increased until that the flat-top of plasma current terminates；
Ohmic heating coil demagnetization process, the negative current in Ohmic heating coil gradually reduces while plasma current is opened
Begin to decline, as electric current is gradually decreased to zero in Ohmic heating coil, plasma current IPAlso it is gradually decreased to zero, is completed primary
Complete plasma discharge experiment.
Of the invention has the technical effect that:
A kind of control system of tockmark Ohmic heating coil current of the present invention, is formed using real-time LINUX and FPGA
Control system so that the control system have good real-time and multitasking ability.System is synchronous using GPS clock
Computer clock in system ensure that the simultaneously operating synchronous communication and synchronous transfer of each system.
A kind of control system of tockmark Ohmic heating coil current of the present invention is generated using FPGA according to control angle
High-precision control pulse operation thyristor turn on and off, realize the accurate control of ohms current needed for plasma controls.
A kind of control system of tockmark Ohmic heating coil current of the present invention uses reflective memory and carries out data biography
It is defeated to be transmitted in the biggish place of interference signal using optical fiber.Watchdog circuit is provided with stable to the safety of system simultaneously
Being monitored ensures that all systems all in good operating status, ensure that system can be steady under tockmark forceful electric power magnetic environment
Fixed efficient work, simultaneity factor have good portability.
Detailed description of the invention
Fig. 1 is the current supply circuit schematic diagram of tockmark Ohmic heating coil；
Fig. 2 is a kind of control system schematic diagram of tockmark Ohmic heating coil current of the present invention；
Fig. 3 be tockmark Ohmic heating coil magnetize in coil, inversion, feedback, demagnetization when coil in electric current feature
Schematic diagram；
Fig. 4 is positive group of electric current when docking positive and negative group of current over-zero using circulation of tockmark Ohmic heating coil and negative
Group current characteristic schematic diagram.
Specific embodiment
Below in conjunction with attached drawing, control system and method to a kind of tockmark Ohmic heating coil current of the present invention into
Row clearly and completely describes.
As shown in Figures 1 to 4, a kind of real-time control system of tockmark Ohmic heating coil current of the present invention, including
Ohmic heating coil power supply circuit, real-time controller, reflective memory card, angle of flow computer, GPS clock and house dog；
Ohmic heating coil power supply circuit is Ohmic heating coil power supply, and real-time controller and Ohmic heating coil supply
Electrical circuit electrical connection, real-time controller, reflective memory card, angle of flow computer, GPS clock and house dog serial communication；
The real-time controller acquires the Ohmic heating coil current and target that electric current passes through acquisition in resistance winding in real time
Electric current controls angle of flow needed for calculating by angle of flow computer；Angle of flow computer is completed by reflective memory
Real-time Data Transmission；
The real-time controller timing sends the operation conditions of 1 millisecond pulse real time monitoring control system to house dog, prevents
Only because computer crashes cause the safety problem of control system；
The GPS clock for control system provide 10M accurate clock with meet Ohmic heating coil magnetize and it is inverse
To the accuracy requirement of time and clock during change, control system time delay is reduced.
Institute's Ohmic heating coil power supply circuit includes generator, AC transformer, forward conduction switch K1, and negative sense is led
It opens up and closes K2, three-phase Forward Converter F1 and three-phase inverted converter F2；Generator is connect with AC transformer, AC transformer
Switch K2 is connected by forward conduction switch K1 and negative sense, the three-phase Forward Converter F1 and three-phase connecting with inverse parallel reversely become
Device F2 connection is flowed, the three-phase Forward Converter F1 and three-phase inverted converter F2 of inverse parallel connection are connect with Ohmic heating coil,
It is powered；
Above-mentioned connection is all made of copper conductor and is attached the magnetization process and reversals met to Ohmic heating coil, together
When also meet the electric current deflecting and circulation operating mode requirement of Ohmic heating coil.
The real-time controller drives analog acquisition card and digital collection by operating system of real-time LINUX, delicate with 200
The coil current and switching signal of acquisition Ohmic heating coil in real time；The real-time controller is calculated by Real-time Feedback operation
The angle of flow of forward conduction switch K1 and negative sense conducting switch K2, and angle of flow computer is transferred to by reflective memory, it leads
By generating, corresponding pulse control signal controls forward conduction switch K1 to current flow angle degree computer and switch K2 conducting is connected in negative sense
Realize the current control of Ohmic heating coil.
The Real-time Feedback operation, which is changed using plasma control algolithm and PID controller according to real-time plasma information, to be counted
Calculate the angle of flow of forward conduction switch K1 and negative sense conducting switch K2；Ionic control algorithm is to control mould using related plasma
Type can accurately reflect the control strategy of plasma current, horizontal displacement, vertical displacement.
The time that the reflective memory completes real-time Data Transmission is delicate interior 80.
Tockmark is added using tockmark Ohmic heating coil current real-time control system the invention also includes a kind of
The method that heating coil current is controlled, method includes the following steps:
Step 1: real-time controller acquires the current value on Ohmic heating coil current sensor in real time；
Step 2: real-time controller coupling coil control current target value and plasma electric flow control target value, anti-in real time
Feedback calculates the angle of flow of forward conduction switch K1 and negative sense conducting switch K2, while sending interrupts to angle of flow computer；
Step 3: checking the reasonability of the angle of flow in real time after angle of flow computer receives interruption and generating corresponding
Control sequential pulse；
Step 4: being carried out using control sequential pulse control Ohmic heating coil power supply circuit to Ohmic heating coil positive
Electric current magnetizes, and carries out inversion actions after the completion of magnetizing, and the electric current in Ohmic heating coil, which declines rapidly, at this time generates high-intensity magnetic field ring
Border completes the breakdown of plasma and climbs, and when subsequent forward current gradually decreases to certain value, opens negative sense conducting switch in real time
K2 simultaneously reverse current start to increase, with reverse current gradually increase continue to plasma flat-top and decline to
Complete primary complete plasma discharge.
The step 4 is further comprising the steps of: according to default resistance winding target current IGoal-selling resistance winding electric currentWith adopt in real time
The Ohmic heating coil current I of collectionAcquisition resistance winding electric current in real time, with coil current difference DELTA I between the twoCurrent differentialEstablish PID/feedback control
System calculates control adjustment amount；
Default resistance winding target current IGoal-selling resistance winding electric currentThe Ohmic heating coil current acquired in real time
IAcquisition resistance winding electric current in real timeIt calculates are as follows:
ΔICurrent differential=IGoal-selling resistance winding electric current-IAcquisition resistance winding electric current in real time (1)
PID/feedback control calculates single voltage and adjusts variable are as follows:
ΔUResistance winding voltage adjustment amount=PID (Δ ICurrent differential) (2)
Calculating Ohmic heating coil voltage adjustment amount, which is controlled, according to PID/feedback calculates the positive three-phase unsteady flow for needing to change
The conducting controlling angled a of device F1JustThe electric current Real-time Feedback that magnetizes that Ohmic heating coil is realized in three-phase Forward Converter F1 rectification is controlled,
The electric current in Ohmic heating coil is set gradually to arrive predetermined target value；Ohmic heating coil control effect such as the 2nd stage of Fig. 3.
The step 4 is further comprising the steps of: control three-phase Forward Converter F1 conducting, which carries out inversion actions, to be made in coil
Electric current, which declines rapidly, to be there is biggish induced current realization breakdown plasma and climbs, in order to guarantee that controlled thyristor has abundance
Turn-off time, safe control surplus and prevent device caused by depth inversion from burning, in Ohmic heating coil reversals
Using 90 ° < αJust< 120 ° are controlled as inversion control angle, Ohmic heating coil control effect such as the 2nd stage of Fig. 3.
The step 4 is further comprising the steps of: as plasma current IPReal-time control system controls three-phase when greater than 50KA
Forward Converter F1 stops inversion actions, while being switched to IPCurrent feedback operational, detailed process are as follows:
According to goal-selling plasma current IP presets plasma currentWith the device plasma current of real-time system acquisition
IP acquires plasma current in real timeDifference DELTA I between the twoP current differentialIt establishes PID/feedback control and calculates the three-phase Forward Converter for needing to change
The angle of flow of F1 realizes the electric current of Ohmic heating coil by plasma current IPFeedback control plasma current gradually reach it is flat
Top；Ohmic heating coil control effect such as the 3rd stage of Fig. 3.
The step 4 is further comprising the steps of: with IPThe continuation of current feedback process, ohm forward current gradually subtract
It is small to arrive 1KA, in order to maintain plasma current IPControl, three-phase inverted converter K2, at this time three-phase Forward Converter F1 is connected
Circulation operating mode is constituted with three-phase inverted converter F2；
It is not allowed the biggish circulation of generation to make three-phase Forward Converter F1 and three-phase inverted converter under circulation operating mode
F2, one in inversion working condition, another is in rectification state and control inverter voltage and rectified voltage are equal electric with inversion
Bear down on one rectified voltage；Ohmic heating coil control effect such as the 4th stage of Fig. 3.
Increase circulation monitoring in the circuit of three-phase Forward Converter F1 and three-phase inverted converter F2, when circulation is excessive
Using αJust+αIt is negative180 ° of (α of >Just、αIt is negativeThe angle of flow of respectively three-phase Forward Converter F1 and three-phase inverted converter F2) carry out ring
The control for flowing size, makes a little higher than rectified voltage of inverter voltage make that biggish circulation cannot be formed between two 3-phase power converters.When
When negative current is greater than 1KA, disconnects forward conduction switch K1 and close three-phase Forward Converter F1, realize Ohmic heating coil
Electric current is by just to negative smooth conversion；Ohmic heating coil control effect is as shown in Figure 4.
The step 4 is further comprising the steps of: when Ohmic heating coil is powered by three-phase inverted converter F2, Europe
When negative current increases in nurse heating coil, plasma I is utilizedPCurrent feedback maintains plasma current flat-top, with feedback procedure
The negative current of carry out Ohmic heating coil be gradually increased until that the flat-top of plasma current terminates；Ohmic heating coil control effect
Fruit is as shown in the 5th stage of Fig. 3.
The step 4 is further comprising the steps of: Ohmic heating coil demagnetization process, the negative sense electricity in Ohmic heating coil
Stream gradually reduces while plasma current is begun to decline, as electric current is gradually decreased to zero in Ohmic heating coil, plasma electric
Flow IPAlso it is gradually decreased to zero, completes primary complete plasma discharge experiment, Ohmic heating coil control effect such as Fig. 3 the 6th
Shown in stage.
Claims (10)
1. a kind of real-time control system of tockmark Ohmic heating coil current, which is characterized in that the control system includes Europe
Nurse heating coil current supply circuit, real-time controller, reflective memory card, angle of flow computer, GPS clock and house dog；
Ohmic heating coil power supply circuit is Ohmic heating coil power supply, and real-time controller and Ohmic heating coil power supply return
Road electrical connection, real-time controller, reflective memory card, angle of flow computer, GPS clock and house dog serial communication；
The real-time controller acquires the Ohmic heating coil current and target current that electric current in resistance winding passes through acquisition in real time,
Angle of flow is controlled needed for calculating by angle of flow computer；Angle of flow computer completes number in real time by reflective memory
According to transmission；
The real-time controller timing sends the operation conditions of 1 millisecond pulse real time monitoring control system to house dog；
The GPS clock provides 10M accurate clock for control system to meet magnetizing and inversion for Ohmic heating coil
To the accuracy requirement of time and clock in journey, control system time delay is reduced.
2. a kind of real-time control system of tockmark Ohmic heating coil current according to claim 1, feature exist
In Ohmic heating coil power supply circuit includes generator, AC transformer, forward conduction switch K1, negative sense conducting switch
K2, three-phase Forward Converter F1 and three-phase inverted converter F2；Generator is connect with AC transformer, and AC transformer is by just
Guide, which opens up, closes K1 and negative sense conducting switch K2, the three-phase Forward Converter F1 connecting with inverse parallel and three-phase inverted converter F2
Connection, the three-phase Forward Converter F1 and three-phase inverted converter F2 of inverse parallel connection are connect with Ohmic heating coil, to ohm
Heating coil is powered.
3. a kind of real-time control system of tockmark Ohmic heating coil current according to claim 1, feature exist
In the real-time controller drives analog acquisition card and digital collection by operating system of real-time LINUX, delicate real-time with 200
Acquire the coil current and switching signal of Ohmic heating coil；The real-time controller calculates forward direction by Real-time Feedback operation
The angle of flow of switch K1 and negative sense conducting switch K2 is connected, and angle of flow computer, the angle of flow are transferred to by reflective memory
Spending computer, corresponding pulse control signal controls forward conduction switch K1 and negative sense is connected switch K2 conducting and realizes by generating
The current control of Ohmic heating coil.
4. a kind of real-time control system of tockmark Ohmic heating coil current according to claim 3, feature exist
In the Real-time Feedback operation is calculated using plasma control algolithm and PID controller according to the variation of real-time plasma information
The angle of flow of forward conduction switch K1 and negative sense conducting switch K2.
5. a kind of add tockmark using tockmark Ohmic heating coil current real-time control system as claimed in claim 2
The method that heating coil current is controlled, which is characterized in that method includes the following steps:
Step 1: real-time controller acquires the current value on Ohmic heating coil current sensor in real time；
Step 2: real-time controller coupling coil control current target value and plasma electric flow control target value, Real-time Feedback meter
The angle of flow of forward conduction switch K1 and negative sense conducting switch K2 are calculated, while sending interrupts to angle of flow computer；
Step 3: checking the reasonability of the angle of flow in real time after angle of flow computer receives interruption and generating corresponding control
Time sequential pulse；
Step 4: carrying out forward current to Ohmic heating coil using control sequential pulse control Ohmic heating coil power supply circuit
It magnetizes, carries out inversion actions after the completion of magnetizing, it is complete to decline rapidly generation strong magnetic field circumstance for the electric current in Ohmic heating coil at this time
At plasma breakdown and climb, when subsequent forward current gradually decreases to certain value, open in real time negative sense conducting switch K2 it is same
When reverse current start to increase, gradually increase the flat-top for continuing to plasma and decline with reverse current to completing
Primary complete plasma discharge.
6. a kind of method that tockmark heating coil current is controlled according to claim 5, which is characterized in that institute
It is further comprising the steps of to state step 4: according to default resistance winding target current IGoal-selling resistance winding electric currentThe ohm acquired in real time adds
Heating coil current IAcquisition resistance winding electric current in real time, with coil current difference DELTA I between the twoCurrent differentialIt establishes PID/feedback control and calculates control
Adjustment amount；
Default resistance winding target current IGoal-selling resistance winding electric currentThe Ohmic heating coil current I acquired in real timeAcquisition resistance winding electric current in real timeMeter
It calculates are as follows:
ΔICurrent differential=IGoal-selling resistance winding electric current-IAcquisition resistance winding electric current in real time (1)
PID/feedback control calculates single voltage and adjusts variable are as follows:
ΔUResistance winding voltage adjustment amount=PID (Δ ICurrent differential) (2)
Calculating Ohmic heating coil voltage adjustment amount, which is controlled, according to PID/feedback calculates the positive 3-phase power converter F1 for needing to change
Conducting controlling angled aJustThe electric current Real-time Feedback that magnetizes that Ohmic heating coil is realized in three-phase Forward Converter F1 rectification is controlled, Europe is made
Electric current in nurse heating coil gradually arrives predetermined target value；
Control three-phase Forward Converter F1 conducting, which carries out inversion actions, makes electric current in coil decline the biggish induced electricity of appearance rapidly
Stream realizes breakdown plasma and climbs, and 90 ° < α is used in Ohmic heating coil reversalsJust< 120 ° are used as inversion control angle
It is controlled.
7. a kind of method that tockmark heating coil current is controlled according to claim 6, which is characterized in that institute
It is further comprising the steps of to state step 4: as plasma current IPReal-time control system controls three-phase Forward Converter when greater than 50KA
F1 stops inversion actions, while being switched to IPCurrent feedback operational, detailed process are as follows:
According to goal-selling plasma current IP presets plasma currentWith the device plasma current I of real-time system acquisitionP acquires plasma current in real time
Difference DELTA I between the twoP current differentialIt establishes PID/feedback control and calculates the conducting for needing the three-phase Forward Converter F1 changed
Angle realizes the electric current of Ohmic heating coil by plasma current IPFeedback control plasma current gradually reach flat-top.
8. a kind of method that tockmark heating coil current is controlled according to claim 7, which is characterized in that institute
It is further comprising the steps of to state step 4: with IPThe continuation of current feedback process, ohm forward current gradually decrease to 1KA, are
Maintenance plasma current IPControl, be connected three-phase inverted converter K2, three-phase Forward Converter F1 and three-phase are reversed at this time
Current transformer F2 constitutes circulation operating mode；
Under circulation operating mode, three-phase Forward Converter F1 and three-phase inverted converter F2 mono- are another in inversion working condition
One in rectification state and control inverter voltage and rectified voltage is equal withstands rectified voltage with inverter voltage.
9. a kind of method that tockmark heating coil current is controlled according to claim 8, which is characterized in that
Increase circulation monitoring in the circuit of three-phase Forward Converter F1 and three-phase inverted converter F2, α is used when circulation is excessiveJust+αIt is negative
The control of 180 ° of > progress circulation sizes, αJust、αIt is negativeThe conducting of respectively three-phase Forward Converter F1 and three-phase inverted converter F2
Angle；Make a little higher than rectified voltage of inverter voltage make to be formed between three-phase Forward Converter F1 and three-phase inverted converter F2 it is larger
Circulation；When negative current is greater than 1KA, disconnects forward conduction switch K1 and close three-phase Forward Converter F1, realize Europe
Nurse heating coil current is by just to negative smooth conversion.
10. a kind of method that tockmark heating coil current is controlled according to claim 9, which is characterized in that
The step 4 is further comprising the steps of: when Ohmic heating coil is powered by three-phase inverted converter F2, Ohmic heating line
When negative current increases in enclosing, plasma I is utilizedPCurrent feedback maintains plasma current flat-top, with the carry out Europe of feedback procedure
The negative current of nurse heating coil is gradually increased until that the flat-top of plasma current terminates；
Ohmic heating coil demagnetization process, under the negative current in Ohmic heating coil gradually reduces while plasma current starts
Drop, as electric current is gradually decreased to zero in Ohmic heating coil, plasma current IPAlso it is gradually decreased to zero, is completed primary complete
Plasma discharge experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448697.9A CN109982497B (en) | 2017-12-27 | 2017-12-27 | System and method for controlling currents of Tokamak ohmic heating coils |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448697.9A CN109982497B (en) | 2017-12-27 | 2017-12-27 | System and method for controlling currents of Tokamak ohmic heating coils |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109982497A true CN109982497A (en) | 2019-07-05 |
| CN109982497B CN109982497B (en) | 2020-11-20 |
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| CN111315107A (en) * | 2018-12-11 | 2020-06-19 | 核工业西南物理研究院 | Tokamak ohmic heating coil control system and method |
| CN113161020A (en) * | 2021-04-20 | 2021-07-23 | 核工业西南物理研究院 | Multi-system combined plasma control platform for Tokamak device |
| CN113300892A (en) * | 2021-05-25 | 2021-08-24 | 西北工业大学 | Real-time communication network system with shared memory |
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| CN109982497B (en) | 2020-11-20 |
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