CN109980980A - Voltage control device and method of converter and converter - Google Patents
Voltage control device and method of converter and converter Download PDFInfo
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- CN109980980A CN109980980A CN201711455750.8A CN201711455750A CN109980980A CN 109980980 A CN109980980 A CN 109980980A CN 201711455750 A CN201711455750 A CN 201711455750A CN 109980980 A CN109980980 A CN 109980980A
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- 238000010586 diagram Methods 0.000 description 11
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Classifications
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- H02J3/386—
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- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac 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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
The invention discloses a voltage control device and method of a converter and the converter. The device comprises a first comparison module, a first feedback regulation module, a second comparison module and a second feedback regulation module which are connected in sequence; the first input end of the first comparison module receives an input voltage given value of the converter, the second input end of the first comparison module receives a feedback voltage value of the converter, the first feedback regulation module outputs a current given value according to a comparison result of the first comparison module, the first input end of the second comparison module receives the current given value output by the first comparison module, the second input end of the second comparison module receives a current feedback value of the converter, and the second feedback regulation module outputs a Pulse Width Modulation (PWM) signal for driving an Insulated Gate Bipolar Transistor (IGBT) in the converter according to the comparison result of the second comparison module so as to regulate the input voltage of the converter. By adopting the technical scheme in the embodiment of the invention, the response speed to the voltage control of the converter can be improved.
Description
Technical field
The present invention relates to the voltage-operated devices and method of technical field of wind power generation more particularly to a kind of current transformer, change
Flow device.
Background technique
During the generated energy after over commutation of wind power generating set needs to be connected to the grid by current transformer.When operation of power networks not
Stablize, for example network voltage increases or falls, the energy for making it possible to be connected to the grid reduces, but wind power generating set is defeated
Power temporarily remains unchanged out, causes the fluctuation of the input voltage of current transformer.
For the fluctuation of the input voltage of control current transformer, method in the prior art is by pi regulator according to converter
The voltage error that input voltage given value and voltage feedback value obtain after subtracting each other obtains modulation voltage duty ratio, then passes through PWM
Generator is converted into the IGBT that pwm signal comes in drive control object, i.e., the input electricity of current transformer is controlled according to voltage differential signal
Stream.
But the inventors of the present application found that input electricity in the prior art that current transformer is controlled according to voltage differential signal
The method of stream needs that the feedback voltage signal of current transformer is first converted to current signal.Due to there is electric piezo-electric in controlling unit
The switch process of stream is reduced to the voltage-controlled speed of response of current transformer.
Summary of the invention
The embodiment of the invention provides a kind of voltage-operated devices of current transformer and method, current transformer, can be improved to change
Flow the voltage-controlled speed of response of device.
In a first aspect, the device includes successively connecting the embodiment of the invention provides a kind of voltage-operated device of current transformer
The first comparison module, the first feedback regulation module, the second comparison module and the second feedback regulation module connect；Wherein, the first ratio
Compared with the input voltage given value that the first input end of module receives current transformer, the second input terminal of the first comparison module receives unsteady flow
The feedback voltage level of device, the first feedback regulation module according to the comparison result of the first comparison module export given value of current value, second
The first input end of comparison module receives the given value of current value of the first comparison module output, the second input terminal of the second comparison module
The current feedback values of current transformer are received, the second feedback regulation module is exported according to the comparison result of the second comparison module for driving
The pulse width modulation (PWM) signal of IGBT in current transformer, to adjust the input voltage of current transformer.
In some embodiments of first aspect, the second feedback regulation module is hysteresis regulator.
In some embodiments of first aspect, set on the route between the first feedback regulation module and the second comparison module
It is equipped with current limiter, is preset with cut-off current in current limiter.
In some embodiments of first aspect, set on the route between the first feedback regulation module and the second comparison module
It is equipped with first switch device, first switch device is used for the disconnection when the output end of current transformer is connected on voltage source, and second
The first input end of comparison module receives preset foreign current given value.
In some embodiments of first aspect, current transformer is DC/AC current transformer, and the output end of DC/AC current transformer accesses
Three phase network；Second comparison module includes three comparators being arranged in parallel, and the second feedback regulation module includes being arranged in parallel
Three hysteresis regulators being separately connected with three comparators；The device further includes phaselocked loop and arithmetic unit；Wherein, phaselocked loop root
Grid phase, the given value of current that arithmetic unit is exported according to the first feedback regulation module are obtained according to the three-phase voltage signal of three phase network
Value and grid phase, export three road given value of current values, and the first end of each comparator receives given value of current value all the way, each comparison
The second end of device receives the current feedback values that phase is corresponded in three phase network, and each hysteresis regulator is according to the comparison for corresponding to comparator
As a result it exports for driving the pulse width modulation (PWM) signal for corresponding to IGBT in DC/AC current transformer, to adjust DC/AC current transformer
Input voltage.
In some embodiments of first aspect, set on the route between the first feedback regulation module and the second comparison module
It is equipped with second switch device, second switch device is used for the disconnection when the DC side of DC/AC current transformer is connected on voltage source, and
The first input end of second comparison module receives preset foreign current given value.
Second aspect, the embodiment of the invention provides a kind of voltage control methods of current transformer, this method comprises:
It is exported by the first feedback regulation module according to the input voltage given value of current transformer and the feedback voltage level of current transformer
Given value of current value；
By the electric current of given value of current value and current transformer that the second feedback regulation module is exported according to the first feedback regulation module
Value of feedback exports the pwm signal for driving the IGBT in current transformer, to adjust the input voltage of current transformer.
In some embodiments of second aspect, when the output end of current transformer is connected on voltage source, control first is opened
It closes device to disconnect, and controls the second feedback regulation module and receive preset foreign current given value.
In some embodiments of second aspect, current transformer is DC/AC current transformer, and the output end of DC/AC current transformer accesses
Three phase network；Second feedback regulation module includes being arranged in parallel three hysteresis regulators；Device further includes phaselocked loop and arithmetic unit；
This method further include: grid phase is obtained according to the three-phase voltage signal of three phase network by phaselocked loop；By arithmetic unit according to first
The given value of current value and grid phase of feedback regulation module output, export three road given value of current values；By each hysteresis regulator root
According to the current feedback values for corresponding to phase in given value of current value all the way and three phase network, output is corresponding in DC/AC current transformer for driving
The pwm signal of IGBT, to adjust the input voltage of DC/AC current transformer.
The third aspect, the embodiment of the invention provides a kind of current transformer, which includes the electricity of current transformer as described above
Pressure control device.
As described above, the voltage-operated device of the current transformer in the embodiment of the present invention is fed back in the first comparison module and first
On the basis of adjustment module, the second comparison module and the second feedback regulation module are increased, establishes the input electricity to current transformer
The current inner loop control mechanism of pressure.The feedback voltage signal of current transformer is first converted into current signal with needs in the prior art
(outer voltage), correcting action could be generated until output voltage generates sufficiently large variation by, which needing, compares, and the present invention is implemented
Current inner loop in example has the advantages that fast response time, and after the input current of current transformer reduces, it is anti-to update second immediately
Pwm signal duty ratio makes the supply voltage of current transformer more so as to avoid the unnecessary fluctuation of output voltage in feedback adjustment module
Add stabilization.
Detailed description of the invention
The present invention may be better understood from the description with reference to the accompanying drawing to a specific embodiment of the invention wherein,
The same or similar appended drawing reference indicates the same or similar feature.
Fig. 1 is the structural schematic diagram of the voltage-operated device of current transformer provided in an embodiment of the present invention；
Fig. 2 be another embodiment of the present invention provides current transformer voltage-operated device structural schematic diagram；
Fig. 3 is the structural schematic diagram of the voltage-operated device for the current transformer that further embodiment of this invention provides；
Fig. 4 is the flow diagram of the voltage control method for the current transformer that one embodiment of the invention provides；
Fig. 5 be another embodiment of the present invention provides current transformer voltage control method flow diagram.
Description of symbols:
The first comparison module of 101-；102- the first feedback regulation module；The second comparison module of 103-；
104- the second feedback regulation module；105- current transformer；1011- first comparator；
1021-PI adjuster；The second comparator of 1031-；1041- hysteresis regulator；
1051-DC/AC current transformer；302- phaselocked loop；303- arithmetic unit.
Specific embodiment
The feature and exemplary embodiment of the various aspects of the embodiment of the present invention is described more fully below.Following detailed
In description, many details are proposed, in order to provide the comprehensive understanding to the embodiment of the present invention.
The embodiment of the invention provides a kind of voltage-operated devices of current transformer and method, current transformer, for sending out wind-force
The input voltage of the current transformer of motor group is controlled, and using the technical solution in the embodiment of the present invention, can pass through setting electricity
Inner ring is flowed to improve to the voltage-controlled speed of response of current transformer.
Fig. 1 is the structural schematic diagram of the voltage-operated device of current transformer 105 provided in an embodiment of the present invention.As shown in Figure 1,
The voltage-operated device of current transformer 105 includes sequentially connected first comparison module 101, the first feedback regulation module 102, second
Comparison module 103 and the second feedback regulation module 104.
Wherein, the first input end of the first comparison module 101 receives the input voltage given value U* of current transformer 105, and first
Second input terminal of comparison module 101 receives the feedback voltage level u of current transformer 105, and the first feedback regulation module 102 is according to first
The comparison result of comparison module 101 exports given value of current value I*, and the first input end of the second comparison module 103 receives first and compares
The given value of current value I* that module 101 exports, the second input terminal of the second comparison module 103 receive the current feedback of current transformer 105
Value i, the second feedback regulation module 104 are exported according to the comparison result of the second comparison module 103 for driving in current transformer 105
The pulse width modulation (PWM) signal of IGBT, to adjust the input voltage of current transformer 105.
As described above, the voltage-operated device of the current transformer 105 in the embodiment of the present invention is in the first comparison module 101 and
On the basis of one feedback regulation module 102, the second comparison module 103 and the second feedback regulation module 104 are increased, is established pair
The current inner loop control mechanism of the input voltage of current transformer 105.With needs in the prior art first by the feedback electricity of current transformer 105
Pressure signal is converted to current signal (outer voltage), needs that amendment could be generated until output voltage generates sufficiently large variation
Effect is compared, and the current inner loop in the embodiment of the present invention has the advantages that fast response time, when the input current of current transformer 105 subtracts
After small, pwm signal duty ratio in the second feedback regulation module 104 can be updated immediately, it is unnecessary so as to avoid output voltage
Fluctuation, keeps the supply voltage of current transformer 105 more stable.
In addition, mean when to capacitor type selecting in current transformer 105 can will for the reduction of the voltage fluctuation of current transformer 105
Capacitance is selected smaller, advantageously reduces the cost and volume of current transformer 105.
Fig. 2 be another embodiment of the present invention provides current transformer voltage-operated device structural schematic diagram.Fig. 2 and Fig. 1
The difference is that the first feedback regulation module 102 in Fig. 2 is specially pi regulator 1021, the second feedback regulation module
104 be specially hysteresis regulator 1041, and the first comparison module 101 is specially first comparator 1011, the second comparison module 103 tool
Body is the second comparator 1031.
Since compared with other kinds of feedback regulator, hysteresis regulator 1041 has the advantages that fast response time, because
This, preferably the second feedback regulation module 104 is hysteresis regulator 1041 in the embodiment of the present invention.
The working principle of the voltage-operated device of current transformer 105 in the example of Fig. 2 are as follows: the first of first comparator 1011
Input terminal receives the input voltage given value U* of current transformer 105, and the second input terminal of first comparator 1011 receives current transformer 105
Feedback voltage level u, pi regulator 1021 exports given value of current value I* according to the comparison result U*-u of first comparator 1011, the
The first input end of two comparators 1031 receives the given value of current value I* that first comparator 1011 exports, the second comparator 1031
Second input terminal receives the current feedback values i of current transformer 105, and hysteresis regulator 1041 is according to the comparison knot of the second comparator 1031
Fruit I*-i exports the pulse width modulation (PWM) signal for driving the IGBT in current transformer 105, to adjust the defeated of current transformer 105
Enter voltage.
According to an embodiment of the invention, occur for the situation for preventing the input current of current transformer 105 excessive, it can also be to PI
The given value of current value I* that adjuster 1021 exports carries out current limliting specifically can be in pi regulator 1021 and the second comparator
Current limiter (not shown) is set on the route between 1031, is preset with cut-off current in current limiter, for example current transformer 105 is most
Big running current.So set, once given value of current signal reaches maximum, will be locked, make when load aggravates suddenly
System is run with maximum current, thus because of over current fault problem caused by not limiting to electric current when avoiding heavy service.
According to an embodiment of the invention, under the operating condition of some input progress electric currents only needed to current transformer 105, such as
When the output of current transformer 105 terminates on voltage source, outer voltage can be disconnected.For example, in pi regulator 1021 and second
First switch device (not shown) is provided on route between comparator 1031, when the output end of current transformer 105 connects
Disconnected when on to voltage source, and the first input end of the second comparison module 103 receive preset foreign current given value (for example,
Given value of current signal is directly arranged by user).So set, on the one hand controlling the input power of current transformer 105, on the other hand
The power for being output to voltage source is controlled, to reach being precisely controlled to current transformer 105.In addition, flexibly to cope with different works
Condition can also switch both working methods online.
It should be noted that the current transformer in wind power generating set includes DC/DC current transformer and DC/AC current transformer, work as change
It, can be directly according to the electricity of the current transformer in the mode of connection building embodiment of the present invention in Fig. 2 when stream device is DC/DC current transformer
Pressure control device.When current transformer is DC/AC current transformer, since the output end of DC/AC current transformer is linked into three phase network,
The voltage-operated device to the current transformer in Fig. 2 is needed to be adjusted.
Fig. 3 is the structural schematic diagram of the voltage-operated device for the current transformer that further embodiment of this invention provides, for showing
Connection structure when current transformer is DC/AC current transformer, between each component of the voltage-operated device of current transformer.Not with Fig. 2
It further include phaselocked loop 302 and arithmetic unit 303 with, the voltage-operated device of the current transformer in Fig. 3, and the second comparison module
103 include three comparators being arranged in parallel, and the second feedback regulation module 104 is distinguished including what is be arranged in parallel with three comparators
Three hysteresis regulators of connection.
The working principle of the voltage-operated device of DC/AC current transformer 1051 in the example of Fig. 3 are as follows:
The first input end of first comparator 1011 receives the input voltage given value U of current transformerdc*, first comparator
1011 the second input terminal receives the feedback voltage level U of current transformerdc, pi regulator is according to the comparison result of first comparator 1011
Udc*-UdcExport given value of current value Idc *；Phaselocked loop 302 is according to the three-phase voltage signal (U of three phase networka, Ub, Uc) obtain power grid
Phase theta, the given value of current value I that arithmetic unit 303 is exported according to pi regulatordc *With grid phase θ, three road given value of current values are exportedThe first end of each comparator receives given value of current value all the way, the second termination of each comparator
The current feedback values that phase is corresponded in three phase network are received, each hysteresis regulator is used for according to the comparison result output of corresponding comparator
The pulse width modulation (PWM) signal of IGBT is corresponded in driving DC/AC current transformer 1051, to adjust the defeated of DC/AC current transformer 1051
Enter voltage.
According to embodiments of the present invention, work as Ua, UbAnd UcWhen for three-phase voltage source, by controlling alternating current and direct current simultaneously
Voltage may make that DC voltage is with good stability.
It, can off voltage ring when direct current flanks voltage source.For example, can be in pi regulator and the second comparison module 103
Between route on be provided with second switch device, second switch device is used to connect in the DC side of DC/AC current transformer 1051
It is disconnected when on to voltage source, and preset foreign current given value I is received by the first input end of the second comparison module 103dc *,
For example, by the directly given I of userdc *, to control the power for being input to 1051 DC side of DC/AC current transformer.
Fig. 4 is the flow diagram for the voltage control method of current transformer that one embodiment of the invention provides, for Fig. 1 and
The voltage-operated device of current transformer in Fig. 2.Step 401 is shown in Fig. 4 to step 404.
In step 401, the input voltage given value of current transformer is received by the first input end of the first comparison module 101,
Second input terminal of the first comparison module 101 receives the feedback voltage level of current transformer.
In step 402, electricity is exported according to the comparison result of the first comparison module 101 by the first feedback regulation module 102
Flow given value.
In step 403, the electricity that the first comparison module 101 exports is received by the first input end of the second comparison module 103
Given value is flowed, the second input terminal of the second comparison module 103 receives the current feedback values of current transformer.
In step 404, it is exported and is used according to the comparison result of the second comparison module 103 by the second feedback regulation module 104
The pwm signal of IGBT in driving current transformer, to adjust the input voltage of current transformer.
According to an embodiment of the invention, can be controlled under the operating condition of some input progress electric currents only needed to current transformer
First switch device disconnection when the output end of current transformer is connected on voltage source processed, and by the first of the second comparison module 103
Input terminal receives preset foreign current given value.
Fig. 5 be another embodiment of the present invention provides current transformer voltage control method flow diagram, for Fig. 3
In DC/AC current transformer 1051 voltage-operated device.Fig. 5 the difference from Fig. 4 is that, further include step 405 in Fig. 5 to
Step 408.
In step 405, grid phase is obtained according to the three-phase voltage signal of three phase network by phaselocked loop 302.
In a step 406, the given value of current value and power grid exported by arithmetic unit 303 according to the first feedback regulation module 102
Phase exports three road given value of current values.
In step 407, given value of current value all the way, the second end of each comparator are received by the first end of each comparator
Receive the current feedback values that phase is corresponded in three phase network.
In a step 408, it is exported according to the comparison result of corresponding comparator for driving DC/AC by each hysteresis regulator
The pulse width modulation (PWM) signal of IGBT is corresponded in current transformer 1051, to adjust the input voltage of DC/AC current transformer 1051.
The embodiment of the present invention also provides a kind of current transformer, which includes the voltage control dress of current transformer as described above
It sets.
It should be clear that all the embodiments in this specification are described in a progressive manner, each embodiment it
Between the same or similar part may refer to each other, the highlights of each of the examples are it is different from other embodiments it
Place.For device embodiment, related place may refer to the declaratives of embodiment of the method.Not office of the embodiment of the present invention
It is limited to particular step and structure described above and shown in figure.Those skilled in the art can understand the present invention in fact
It after the spirit for applying example, is variously modified, modification and addition, or the sequence between changing the step.Also, it is risen in order to concise
See, omits the detailed description to known method technology here.
Functional block shown in structures described above block diagram can be implemented as hardware, software, firmware or their group
It closes.When realizing in hardware, it may, for example, be electronic circuit, specific integrated circuit (ASIC), firmware appropriate, insert
Part, function card etc..When being realized with software mode, the element of the embodiment of the present invention is used to execute the program of required task
Or code segment.Perhaps code segment can store in machine readable media program or the data by carrying in carrier wave are believed
It number is sent in transmission medium or communication links." machine readable media " may include be capable of storage or transmission information any
Medium.The example of machine readable media includes electronic circuit, semiconductor memory devices, ROM, flash memory, erasable ROM
(EROM), floppy disk, CD-ROM, CD, hard disk, fiber medium, radio frequency (RF) link, etc..Code segment can via such as because
The computer network of special net, Intranet etc. is downloaded.
The embodiment of the present invention can be realized in other specific forms, without departing from its spirit and essential characteristics.For example, special
Determining algorithm described in embodiment can be modified, and system architecture is without departing from the substantially smart of the embodiment of the present invention
Mind.Therefore, current embodiment is all counted as being exemplary rather than limited, the model of the embodiment of the present invention in all respects
It encloses by appended claims rather than foregoing description defines, also, falls into the meaning of claim and complete in the range of equivalent
Portion changes all to be included among the range of the embodiment of the present invention.
Claims (10)
1. a kind of voltage-operated device of current transformer, which is characterized in that including sequentially connected first comparison module, the first feedback
Adjustment module, the second comparison module and the second feedback regulation module；Wherein,
The first input end of first comparison module receives the input voltage given value of the current transformer, and described first compares mould
Second input terminal of block receives the feedback voltage level of the current transformer；
The first feedback regulation module exports given value of current value according to the comparison result of first comparison module；
The first input end of second comparison module receives the given value of current value of first comparison module output, and described second
Second input terminal of comparison module receives the current feedback values of the current transformer；
The second feedback regulation module is exported according to the comparison result of second comparison module for driving the current transformer
In IGBT pulse width modulation (PWM) signal, to adjust the input voltage of the current transformer.
2. the apparatus according to claim 1, which is characterized in that the second feedback regulation module is hysteresis regulator.
3. the apparatus of claim 2, which is characterized in that the first feedback regulation module and described second compares mould
Current limiter is provided on route between block.
4. the apparatus of claim 2, which is characterized in that the first feedback regulation module and described second compares mould
First switch device is provided on route between block, the first switch device is used to connect in the output end of the current transformer
It is disconnected when on to voltage source, and the first input end of second comparison module receives preset foreign current given value.
5. the apparatus according to claim 1, which is characterized in that the current transformer is DC/AC current transformer, and the DC/AC becomes
The output end for flowing device accesses three phase network；
Second comparison module includes three comparators being arranged in parallel, and the second feedback regulation module includes being arranged in parallel
Three hysteresis regulators being separately connected with three comparators；
Described device further includes phaselocked loop and arithmetic unit；Wherein,
The phaselocked loop obtains grid phase according to the three-phase voltage signal of the three phase network；
The given value of current value and the grid phase that the arithmetic unit is exported according to the first feedback regulation module, export three tunnels
Given value of current value；
The first end of each comparator receives the given value of current value all the way, and the second end of each comparator receives in three phase network
The current feedback values of corresponding phase, each hysteresis regulator are exported according to the comparison result of corresponding comparator for driving the DC/
The pulse width modulation (PWM) signal of IGBT is corresponded in AC current transformer, to adjust the input voltage of the DC/AC current transformer.
6. device according to claim 5, which is characterized in that the first feedback regulation module and described second compares mould
Second switch device is provided on route between block, the second switch device is used for the direct current in the DC/AC current transformer
Disconnection when side is connected on voltage source, and the first input end of second comparison module receives preset foreign current and gives
Value.
7. a kind of voltage control method of current transformer characterized by comprising
By the first feedback regulation module according to the input voltage given value of the current transformer and the feedback voltage level of the current transformer
Export given value of current value；
The given value of current value that is exported by the second feedback regulation module according to the first feedback regulation module and the current transformer
Current feedback values export the pwm signal for driving the IGBT in the current transformer, to adjust the input voltage of the current transformer.
8. the method according to the description of claim 7 is characterized in that the method also includes: when the output end of the current transformer
When being connected on voltage source, control first switch device is disconnected, and is controlled the second feedback regulation module and received outside preset
Portion's given value of current value.
9. the DC/AC becomes the method according to the description of claim 7 is characterized in that the current transformer is DC/AC current transformer
The output end for flowing device accesses three phase network；The second feedback regulation module includes being arranged in parallel three hysteresis regulators；
The method also includes:
Grid phase is obtained according to the three-phase voltage signal of the three phase network by phaselocked loop；
The given value of current value exported by arithmetic unit according to the first feedback regulation module and the grid phase, three roads of output electricity
Flow given value；
By each hysteresis regulator according to the current feedback values for corresponding to phase in given value of current value all the way and three phase network, output is used for
The pwm signal that IGBT is corresponded in the DC/AC current transformer is driven, to adjust the input voltage of the DC/AC current transformer.
10. a kind of current transformer, which is characterized in that the voltage including current transformer as claimed in any one of claims 1 to 6 controls dress
It sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455750.8A CN109980980A (en) | 2017-12-28 | 2017-12-28 | Voltage control device and method of converter and converter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455750.8A CN109980980A (en) | 2017-12-28 | 2017-12-28 | Voltage control device and method of converter and converter |
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| CN109980980A true CN109980980A (en) | 2019-07-05 |
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ID=67074276
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| CN201711455750.8A Pending CN109980980A (en) | 2017-12-28 | 2017-12-28 | Voltage control device and method of converter and converter |
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| CN104734178A (en) * | 2013-12-24 | 2015-06-24 | 珠海格力电器股份有限公司 | Solar air conditioning system and control method thereof |
| CN103887824A (en) * | 2014-04-17 | 2014-06-25 | 浙江大学 | Voltage loop ripple compensation control system and control method of photovoltaic grid-connected inverter |
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