CN106411156A - Current sharing control method and circuit of 12-pulse phase-controlled DC power supply - Google Patents
Current sharing control method and circuit of 12-pulse phase-controlled DC power supply Download PDFInfo
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- CN106411156A CN106411156A CN201610970081.7A CN201610970081A CN106411156A CN 106411156 A CN106411156 A CN 106411156A CN 201610970081 A CN201610970081 A CN 201610970081A CN 106411156 A CN106411156 A CN 106411156A
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Classifications
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/162—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration
- H02M7/1623—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit
- H02M7/1626—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a bridge configuration with control circuit with automatic control of the output voltage or current
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/17—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only arranged for operation in parallel
Abstract
The invention relates to a current sharing control method and a current sharing control circuit of a 12-pulse phase-controlled DC power supply. According to the current sharing control method, two groups of rectifying bridges are each provided with a current sharing ring, and giving signals of the two current sharing ring are identical; when in constant-voltage charging, the giving signal of each current sharing ring is an error signal of a given voltage signal and a DC power supply output voltage signal; and when in constant-current charging, the giving signal of each current sharing ring is an error signal of a DC power supply output voltage and a difference between a giving current signal and a DC power supply output current signal through PI. The current sharing control method and the current sharing control circuit make output currents of the two groups of three-phase rectifying bridges equal while realizing an output voltage-stabilizing or current-stabilizing control function, achieves current sharing control, can prevent a module from operating in an output current critical state, and ensure the reliability of parallel operation of converters.
Description
Technical field
The invention belongs to electric and electronic technical field is and in particular to a kind of phased DC source current-sharing control method of 12 pulse waves
And circuit.
Background technology
High power rectification system is transformed to utilization of power by alternating current-direct current electric energy and provides a new way, it has also become national
The important component part of industry.IGCT is that high-power electric converts more satisfactory device.IGCT has that capacity is big, high pressure,
The advantages of efficiency high, noiselessness, small volume, lightweight, reaction fast, controllable, good reliability, become Semiconductor Converting Technology development
Basis.All trades and professions in modern industry for the thyristor converter devices are widely used.
Influence each other due between 2 group of 6 pulse wave three-phase fully-controlled thyristor rectifier bridge, and can not simultaneously with same voltage,
Electric current exports, and will result in when wherein one modular power source is adjusted another 1 modular power source with being adjusted, this power supply
Adjust the regulation again causing First power supply, such vicious cycle, thus cause vibration.Slight vibration, can cause to load
Two ends electric current, voltage instability, affect charge operation effect, oscillation amplitude is excessive, gently then burn out load, power supply itself, heavy then draw
Play supply line to damage, cause major accident.It can be seen that, when multiple wired in parallel run it is necessary to output to each module
Electric current is monitored, and to ensure that every converter module more fifty-fifty shares total output using suitable control strategy simultaneously
Electric current, the parallel current-sharing realizing multiple modules runs.Only have selected suitable equal Flow Policy, just can prevent module from operating in defeated
Go out electric current critical state, the reliability of guarantee changer parallel running.
Content of the invention
It is an object of the invention to provide a kind of phased DC source current-sharing control method of 12 pulse waves and circuit, to realize passing through
Export voltage stabilizing or current stabilization control function to realize all stream of rectifier bridge.
For solve above-mentioned technical problem, the present invention provide a kind of phased DC source current-sharing control method of 12 pulse waves, two groups
Rectifier bridge is respectively provided with flow equalizing ring, and the Setting signal of two flow equalizing rings is identical：
When constant-voltage charge, the Setting signal of flow equalizing ring is the mistake of given voltage signal and DC power output voltage signal
Difference signal；
When constant-current charge, the Setting signal of flow equalizing ring is the difference of given current signal and DC source output current signal
The error signal with DC power output voltage after PI.
The present invention also provides a kind of 12 pulse waves phased DC source equalizing control circuit, described circuit include electric current outer shroud,
Voltage inter-loop and the first rectifier bridge flow equalizing ring, the second rectifier bridge flow equalizing ring；
Electric current outer shroud：Given current signal is connected with the in-phase input end of the first transport and placing device by the first follower, direct current
Electric power outputting current signal is connected with the inverting input of the first transport and placing device, and the output signal of the first transport and placing device is electric current outer shroud
Output signal；
Voltage inter-loop：Given voltage signal is connected with the in-phase input end of the second transport and placing device by the second follower, electric current
The output signal of outer shroud is connected with the in-phase input end of the second transport and placing device through reverse diode, and DC power output voltage is believed
Number it is connected with the inverting input of the second transport and placing device, the output signal of the second transport and placing device is the output signal of voltage inter-loop；
First rectifier bridge flow equalizing ring：The output signal of voltage inter-loop connects the in-phase input end of the 3rd transport and placing device, and first is whole
Stream bridge output current signal connects the inverting input of the 3rd transport and placing device through the 3rd follower, and the output of the 3rd transport and placing device is used for
Connect drive circuit；
Second rectifier bridge flow equalizing ring：The output signal of voltage inter-loop connects the in-phase input end of four high guaily unit device, and second is whole
Stream bridge output current signal connects the inverting input of four high guaily unit device through the 4th follower, and the output of four high guaily unit device is used for
Connect drive circuit.
The invention has the beneficial effects as follows：By in different control models, i.e. constant voltage or constant current mode, using different equal
The Setting signal of stream ring, realizes all stream of rectifier bridge；Meanwhile, control circuit adopts electric current outer shroud, voltage inter-loop, flow equalizing ring successively
The control mode combining, realizes making the output current of two groups of three-phase commutation bridges while output voltage stabilizing or current stabilization control function
Equal it is achieved that sharing control.The present invention prevents the module from operating in output current critical state it is ensured that changer parallel running
Reliability.
Brief description
Fig. 1 is the theory structure schematic diagram of the present invention；
Fig. 2 is the control circuit schematic diagram of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, the present invention is further described in detail.
In conjunction with Fig. 1 and Fig. 2, total output current io, total output voltage uo, and 2 groups of rectifier bridges output current io1
And io2It is transformed to the analog voltage signal of 0～10V, respectively DC source output electricity through the modulate circuit in SCR control unit
Stream signal iof, DC power output voltage signal uf, the first rectifier bridge output current signal io1fWith the second rectifier bridge output current
Signal io2f.
Described circuit includes electric current outer shroud, voltage inter-loop and flow equalizing ring.As shown in Fig. 2 wherein, from given current signal
irefWith DC source output current signal iofEnter into output signal i of electric current outer shroudeFor electric current outer shroud；From electric current outer shroud
Output signal ie, given voltage signal urefWith DC power output voltage signal ufEnter into output signal u of voltage inter-loopeFor
Voltage inter-loop；Output signal u from voltage inter-loopeWith the first rectifier bridge output current signal io1fOutput to the 3rd transport and placing device
Signal uk1And output signal u of voltage inter-loopeWith the first rectifier bridge output current signal io2fOutput letter to four high guaily unit device
Number uk2For flow equalizing ring, before loop output as loop below Setting signal.
Given current signal irefEnter the first follower U1In-phase input end, the first follower U1Inverting input with
U1Outfan be connected obtain Setting signal iG, iGAs electric current loop given input through resistance R1With the first transport and placing device U2Homophase
Input is connected；DC source output current signal iofFeed back input as electric current loop connects the first transport and placing device U2Anti-phase defeated
Enter end, the first transport and placing device U simultaneously2Inverting input through resistance RiGWith electric capacity CiGWith the first transport and placing device U2Outfan be connected,
Obtain output signal i of electric current outer shroude.
Output signal i of electric current outer shroudeAs voltage inter-loop given input through resistance R2Connect the with backward diode D
Two transport and placing device U4In-phase input end；Given voltage signal urefEnter the first follower U3In-phase input end, the first follower
U3Inverting input and U3Outfan be connected obtain Setting signal uG, uGAs Voltage loop given input through resistance R3Connect
Second transport and placing device U4In-phase input end；DC power output voltage signal ufFeed back input as Voltage loop connects the second fortune
Put device U4Inverting input, the second transport and placing device U simultaneously4Inverting input through resistance RuGWith electric capacity CuGWith the second transport and placing device U4
Outfan be connected, obtain output signal u of voltage inter-loope.
First rectifier bridge output current signal io1fEnter the 3rd follower U5In-phase input end, the 3rd follower U5Anti-
Phase input and the 3rd follower U5Outfan be connected obtain the first rectifier bridge all stream feedback signal, as the first rectifier bridge
The feed back input of flow equalizing ring is through resistance R5Connect the 3rd transport and placing device U7Inverting input；Output signal u of voltage inter-loopeAs
The given input of the first rectifier bridge flow equalizing ring is through resistance R4Connect the 3rd transport and placing device U7In-phase input end, the 3rd transport and placing device simultaneously
U7Inverting input through resistance ReWith electric capacity CeWith the 3rd transport and placing device U7Outfan be connected, obtain the first output signal uk1.
Second rectifier bridge output current signal io2fEnter the 4th follower U6In-phase input end, the 4th follower U6Anti-
Phase input and the 4th follower U6Outfan be connected obtain the second rectifier bridge all stream feedback signal, as the second rectifier bridge
The feed back input of flow equalizing ring is through resistance R6Connect four high guaily unit device U8Inverting input；Output signal u of voltage inter-loopeAs
The given input of the second rectifier bridge flow equalizing ring is through resistance R9Connect four high guaily unit device U8In-phase input end, four high guaily unit device simultaneously
U8Inverting input through resistance ReWith electric capacity CeWith four high guaily unit device U8Outfan be connected, obtain the second output signal uk2.
According to the short resolution of void of amplifier, work as R4=R9, R5=R6When, io1fWith io2fEqual, thus realizing all
Stream.
Two groups of rectifier bridges are respectively provided with flow equalizing ring, and the Setting signal of two flow equalizing rings is identical：When constant-voltage charge, the giving of flow equalizing ring
Determine the error signal that signal is given voltage signal and DC power output voltage signal；When constant-current charge, the giving of flow equalizing ring
Determine signal be given current signal with the difference of DC source output current signal after PI with DC power output voltage
Error signal.Specifically work process is：
When the phased DC source of nuclear island 12 pulse wave is in constant-current charge, DC source output current signal iofThrough overcurrent
Output signal i of ring output current outer shroude, ieThan given voltage signal urefLittle, output signal i of electric current outer shroudeAs voltage
The Setting signal of internal ring, through voltage inter-loop output voltage internal ring output signal ue, ueGiven letter as two groups of three-phase commutation bridges
Number to control the Trigger Angle of IGCT through the error signal of flow equalizing ring output, finally to make DC source output current signal iofDeng
Setting signal in current constant control.Due to ie＜ urefMake output DC power output voltage signal ufVoltage less than constant-voltage charge
Value, and the given u of flow equalizing ringeIdentical, after the PI of flow equalizing ring, control to adjust io1fAnd io2fIt is equal to ueAnd the i being equal toofOne
Half.
When the phased DC source of nuclear island 12 pulse wave is in constant-voltage charge, due to iof＜ irefThen diode D cut-off, electric current
Ring is inoperative, output signal i of electric current outer shroudeDo not affect the given of Voltage loop, DC power output voltage signal ufAs electricity
The Setting signal of pressure internal ring.Through voltage inter-loop output voltage internal ring output signal ue, ueGiven as two groups of three-phase commutation bridges
The error signal that signal exports through flow equalizing ring to control the Trigger Angle of IGCT, so that output DC power output voltage is believed
Number ufEqual to voltage Setting signal uref, and the given u of flow equalizing ringeIdentical, after the PI of flow equalizing ring, control to adjust io1fAnd io2f
It is equal to output current iofHalf.
First output signal uk1Through resistance R7It is connected with SCR driver element, simultaneously 1 group of 6 pulse wave three-phase fully-controlled IGCT
The synchronizing signal of rectifier bridge is also connected with SCR driver element, and its output drive signal SCR1 controls this to organize 6 pulse wave three-phase fully-controlleds
6 IGCTs of thyristor rectifier bridge；Second output signal uk2Through resistance R8It is connected with SCR driver element, another 1 group 6 simultaneously
The synchronizing signal of pulse wave three-phase fully-controlled thyristor rectifier bridge is also connected with SCR driver element, and its output drive signal SCR2 is controlled
Make 6 IGCTs of this group 6 pulse wave three-phase fully-controlled thyristor rectifier bridge.Achieve output voltage stabilizing or the control function of current stabilization,
It is simultaneously achieved 2 groups of rectifier bridge sharing control.
It is presented above the present invention relates to specific embodiment, but the present invention is not limited to described embodiment.
Under the thinking that the present invention is given, to the skill in above-described embodiment by the way of being readily apparent that to those skilled in the art
Art means enter line translation, replacement, the relevant art means in modification, and the effect played and the present invention are essentially identical, realize
Goal of the invention also essentially identical, so formed technical scheme be that formation is finely adjusted to above-described embodiment, this technology
Scheme still falls within protection scope of the present invention.
Claims (2)
1. a kind of phased DC source current-sharing control method of 12 pulse waves is it is characterised in that two groups of rectifier bridges are respectively provided with flow equalizing ring, and two
The Setting signal of flow equalizing ring is identical：
When constant-voltage charge, the Setting signal of flow equalizing ring is the error letter of given voltage signal and DC power output voltage signal
Number；
When constant-current charge, the Setting signal of flow equalizing ring is that given current signal is passed through with the difference of DC source output current signal
Error signal with DC power output voltage after PI.
2. a kind of phased DC source equalizing control circuit of 12 pulse waves is it is characterised in that described circuit includes electric current outer shroud, voltage
Internal ring and the first rectifier bridge flow equalizing ring, the second rectifier bridge flow equalizing ring；
Electric current outer shroud：Given current signal is connected with the in-phase input end of the first transport and placing device by the first follower, DC source
Output current signal is connected with the inverting input of the first transport and placing device, and the output signal of the first transport and placing device is the output of electric current outer shroud
Signal；
Voltage inter-loop：Given voltage signal is connected with the in-phase input end of the second transport and placing device by the second follower, electric current outer shroud
Output signal be connected with the in-phase input end of the second transport and placing device through reverse diode, DC power output voltage signal with
The inverting input of the second transport and placing device is connected, and the output signal of the second transport and placing device is the output signal of voltage inter-loop；
First rectifier bridge flow equalizing ring：The output signal of voltage inter-loop connects the in-phase input end of the 3rd transport and placing device, the first rectifier bridge
Output current signal connects the inverting input of the 3rd transport and placing device through the 3rd follower, and the output of the 3rd transport and placing device is used for connecting
Drive circuit；
Second rectifier bridge flow equalizing ring：The output signal of voltage inter-loop connects the in-phase input end of four high guaily unit device, the second rectifier bridge
Output current signal connects the inverting input of four high guaily unit device through the 4th follower, and the output of four high guaily unit device is used for connecting
Drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610970081.7A CN106411156B (en) | 2016-10-28 | 2016-10-28 | The phased DC power supply current-sharing control method of 12 pulse waves of one kind and circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610970081.7A CN106411156B (en) | 2016-10-28 | 2016-10-28 | The phased DC power supply current-sharing control method of 12 pulse waves of one kind and circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106411156A true CN106411156A (en) | 2017-02-15 |
| CN106411156B CN106411156B (en) | 2019-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610970081.7A Active CN106411156B (en) | 2016-10-28 | 2016-10-28 | The phased DC power supply current-sharing control method of 12 pulse waves of one kind and circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639159A (en) * | 2018-12-18 | 2019-04-16 | 辽宁恒顺新能源科技有限公司 | High-voltage rectifying system |
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