CN102638171A - Non-isolated constant amplitude vector alternating current voltage regulator - Google Patents

Non-isolated constant amplitude vector alternating current voltage regulator Download PDF

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Publication number
CN102638171A
CN102638171A CN2012101036552A CN201210103655A CN102638171A CN 102638171 A CN102638171 A CN 102638171A CN 2012101036552 A CN2012101036552 A CN 2012101036552A CN 201210103655 A CN201210103655 A CN 201210103655A CN 102638171 A CN102638171 A CN 102638171A
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voltage
converters
vector
voltage regulator
output voltage
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CN2012101036552A
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Chinese (zh)
Inventor
张代润
刘红萍
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Sichuan University
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Sichuan University
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Abstract

The invention discloses a non-isolated constant amplitude vector alternating current voltage regulator which is characterized in that an input voltage vector of a power supply is represented by Upsilon S, a compensation voltage vector generated by an electronic power converter b is represented by Upsilon C, an output voltage vector of a load is represented by Upsilon O, and an electronic power converter a is connected with an electronic power converter b by a high-frequency isolating transformer T (4) and the electronic power converter a and the electronic power converter b are sequentially connected into a whole by an electronic power converter circuit and a voltage regulator circuit; and the regulation of the wide-amplitude output voltage vector can be realized only by regulating the relative phase angle alpha without changing the phase difference alpha of the compensation voltage relative to the voltage of the power supply. The non-isolated constant amplitude vector alternating current voltage regulator is applicable to a single-phase or three-phase alternating current voltage regulator, an alternating current voltage stabilizer, an alternating current phase shifter, a sinusoidal wave inverter, a sinusoidal wave frequency converter and an electronic power transformer which need wide-amplitude sinusoidal voltage regulation.

Description

A kind of nothing is isolated permanent width of cloth vector AC voltage regulator
Technical field
The present invention relates to a kind of nothing and isolate permanent width of cloth vector (or permanent width of cloth phasor) AC voltage regulator, the single-phase or three-phase contactless of particularly do not have isolating between power supply and load, stepless, the sinusoidal wave power electronics voltage regulator of wide cut, pressurizer.Belong to AC voltage adjusting, AC voltage-stabilizing technical field.
Background technology
Existing AC voltage adjusting, method for stabilizing voltage mainly contain:
(1) adopt servomotor to drive brush and move the pressure regulation of realization transformer output voltage, output voltage realizes having level (transformer has a plurality of taps) or stepless (like autotransformer) to regulate.But because the existence of motor and brush promptly is the voltage regulating mode that the contact is arranged, its shortcoming is that pressure regulation speed is slow, the life-span short, be prone to get stuck, volume greatly, Heavy Weight etc.
(2) adopt controllable silicon to regulate the transformer output voltage, realize contactless voltage regulating mode as electronic switch.But, can't realize continuous voltage regulating, thereby the low deficiency of output voltage precision is arranged because of pressure regulation has level; Because of Industrial Frequency Transformer is arranged, still have that volume is big, the deficiency of Heavy Weight.
(3) mode with the AC/DC/AC conversion realizes the AC sine wave pressure regulation; The big electrochemical capacitor of direct current ring is regulated slowly the direct current loop voltag; And when only depending on the index of modulation to come control output voltage, waveform difference, deficiency that precision is low are arranged at output voltage when higher or low, be difficult to realize the wide cut pressure regulation.
When (4) realizing the AC sine wave pressure regulation, the deficiency that output voltage waveforms is poor, precision is low is arranged with the mode of AC/AC conversion; Simultaneously, also be difficult to use the system of single phase poaer supply.
Summary of the invention
The objective of the invention is to the deficiency of prior art and provide a kind of nothing to isolate permanent width of cloth vector AC voltage regulator, be characterized in: do not have isolate contactless, stepless, the sinusoidal wave power electronics voltage regulator of wide cut, pressurizer; Be applicable to single, the three-phase system of different capacitance grade; Volume is little, in light weight.
The object of the invention is realized by following technical measures.
The permanent width of cloth vector AC voltage regulator of nothing isolation is connected with converters b through high-frequency isolation transformer T, and is in turn connected into integral body through converters circuit, regulator circuit by output voltage vector
Figure BDA0000151946290000013
the converters a of bucking voltage vector load of input voltage vector
Figure BDA0000151946290000011
the converters b generation of power supply; Bucking voltage
Figure BDA0000151946290000014
is with respect to the phase difference α of supply voltage
Figure BDA0000151946290000015
; Do not change the size of
Figure BDA0000151946290000016
; Only the phase angle [alpha] of adjustment
Figure BDA0000151946290000017
relative
Figure BDA0000151946290000018
just can realize that the output voltage vector
Figure BDA0000151946290000021
of wide cut is regulated.
Do not have the permanent width of cloth vector AC voltage regulator circuit of isolation and be input to converters a by AC power
Figure BDA0000151946290000022
; Behind high-frequency isolation transformer T, be connected with converters b; Converter b generation bucking voltage
Figure BDA0000151946290000023
and
Figure BDA0000151946290000024
sum obtains output voltage and keeps
Figure BDA0000151946290000026
amplitude constant; Only change the phase angle [alpha] of relative supply voltage
Figure BDA0000151946290000027
, just can obtain the different sinewave output voltage of amplitude
Figure BDA0000151946290000028
i.e.
Figure BDA0000151946290000029
Converters circuit one termination has C fL fFilter is by main switch T 1～T 8Constitute two back-to-back bridge converter structures, be connected to dc energy storage capacitor C on the public direct-current ring Dc, the other end is connected with high-frequency isolation transformer T.
There is not the purposes of isolating permanent width of cloth vector AC voltage regulator:
When between supply voltage and load voltage
Figure BDA00001519462900000211
, do not isolate, it is identical with supply voltage that the frequency of load voltage must keep; This circuit can't be realized frequency conversion, can only realize the adjusting to output voltage, is applicable to that the single-phase or three-phase of the sinusoidal wave pressure regulation of wide cut does not have isolated form AC voltage regulator, AC voltage regulator, interchange phase shifter, electric power electric transformer.
During as voltage regulator, U S=U N, U NBe rated voltage, require output voltage U OAt (0～1.2) * U NBetween change, phase angle [alpha] should be regulated between 180 °～106.26 °, owing to α＞90 °, converters b from
Figure BDA00001519462900000212
The place absorbs electric energy, passes to converters a through high-frequency isolation transformer T, feeds back to electrical network to electric energy by converter a then.
The present invention has following advantage:
(1) realizes big capacity wide cut contactless, stepless sinusoidal wave the do not have power electronics of isolation voltage regulator, pressurizer.
(2) be applicable to list, three-phase system.
(3) no industrial frequency transformer has reduced weight of equipment and volume.
Caption
Fig. 1 isolates permanent width of cloth vector voltage regulator schematic diagram for nothing of the present invention.
1 power supply input voltage vector
Figure BDA00001519462900000213
2. power electronic converters b sine wave output voltage vector 3. output to the load output voltage vector
Figure BDA00001519462900000215
4. frequency isolation transformer T.
Fig. 2 is not for there being the converters circuit of isolating permanent width of cloth vector AC voltage regulator.
5. the filtering capacitor C of converters f, 6. filter reactor L f, the 7. main switch T of converters 1～T 8, 8. DC side energy storage capacitor C Dc
Embodiment
Through embodiment the present invention is carried out concrete description below; Be necessary to be pointed out that at this present embodiment can only be used for the present invention is further specified; Can not be interpreted as the restriction to protection range of the present invention, the skilled personnel of this area can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment 1
AC power Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
Figure BDA0000151946290000032
With
Figure BDA0000151946290000033
Sum obtains output voltage
Figure BDA0000151946290000034
Keep
Figure BDA0000151946290000035
Amplitude is constant, only changes relative supply voltage
Figure BDA0000151946290000036
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA0000151946290000037
Promptly
Figure BDA0000151946290000038
Converters circuit one termination has C f5L f6 filters are by main switch T 1～T 87 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc8, the other end is connected with high-frequency isolation transformer T4.In AC voltage regulator, work as U S=U N, U NBe rated voltage, require output voltage at (0～1.2) * U NThe interior variation, the adjustable range of α is so: 180 °～106.26 °.
Embodiment 2
AC power
Figure BDA0000151946290000039
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
Figure BDA00001519462900000310
With
Figure BDA00001519462900000311
Sum obtains output voltage
Figure BDA00001519462900000312
Keep Amplitude is constant, only changes relative supply voltage
Figure BDA00001519462900000314
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA00001519462900000315
Promptly
Figure BDA00001519462900000316
Converters circuit one termination has C f5L f6 filters are by main switch T 1～T 87 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc8, the other end is connected with high-frequency isolation transformer T4.In AC voltage regulator, work as U S=0.5U N, the low half of input voltage to rated voltage, load voltage still can reach rated voltage, promptly during α=0 °, U is arranged O=U NSo input voltage is at (0.5～1.0) * U NThe time, output voltage can remain rated value.Work as U S>=U NThe time, solving equation gets unique α value (α>=120 °) and makes U O=U NRealize (0.5U N≤U S＜∞) the unusual AC voltage-stabilizing of wide cut.
Embodiment 3
AC power
Figure BDA00001519462900000317
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
Figure BDA00001519462900000318
With
Figure BDA00001519462900000319
Sum obtains output voltage
Figure BDA00001519462900000320
Keep Amplitude is constant, only changes relative supply voltage
Figure BDA00001519462900000322
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA00001519462900000323
Promptly
Figure BDA00001519462900000324
Converters circuit one termination has C f5L f6 filters are by main switch T 1～T 87 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc8, the other end is connected with high-frequency isolation transformer T4.In exchanging phase shifter, work as U S=U N, U NBe rated voltage, the adjustment process of α is (0 ° → 90 ° → 180 °), and output voltage is changed to (2U so N→ 1.4U N→ 0), output voltage
Figure BDA0000151946290000041
With respect to input voltage
Figure BDA0000151946290000042
Being changed to of phase difference (0 ° → 45 ° → 90 °).
Embodiment 4
AC power
Figure BDA0000151946290000043
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
Figure BDA0000151946290000044
With
Figure BDA0000151946290000045
Sum obtains output voltage
Figure BDA0000151946290000046
Keep
Figure BDA0000151946290000047
Amplitude is constant, only changes relative supply voltage Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA0000151946290000049
Promptly Converters circuit one termination has C f5L f6 filters are by main switch T 1～T 87 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc8, the other end is connected with high-frequency isolation transformer T4.In electric power electric transformer, can realize comprehensive function as AC voltage regulator, AC voltage regulator, interchange phase shifter, improve the controllability of power transformer.
Embodiment 5
AC power
Figure BDA00001519462900000411
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
Figure BDA00001519462900000412
With
Figure BDA00001519462900000413
Sum obtains output voltage
Figure BDA00001519462900000414
Keep
Figure BDA00001519462900000415
Amplitude is constant, only changes relative supply voltage
Figure BDA00001519462900000416
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA00001519462900000417
Promptly Converters circuit one termination has C f5L f6 filters are by main switch T 1～T 87 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc8, the other end is connected with high-frequency isolation transformer T4.Among the embodiment 1～4, single phase circuit is through triangle or star connection, obtain successively three-phase do not have the AC voltage regulator of isolation, three-phase do not have the AC voltage regulator of isolation, three-phase do not have isolate exchange phase shifter, three-phase does not have the isolation electric power electric transformer.

Claims (4)

1. one kind is not had the permanent width of cloth vector AC voltage regulator of isolation; It is characterized in that this AC voltage regulator is connected with converters b through high-frequency isolation transformer T (4), and is in turn connected into integral body through converters circuit, regulator circuit by output voltage vector
Figure FDA0000151946280000013
the converters a of bucking voltage vector
Figure FDA0000151946280000012
load of input voltage vector
Figure FDA0000151946280000011
the converters b generation of power supply; Bucking voltage
Figure FDA0000151946280000014
is with respect to the phase difference α of supply voltage ; Do not change the size of
Figure FDA0000151946280000016
; Only the phase angle [alpha] of adjustment
Figure FDA0000151946280000017
relative
Figure FDA0000151946280000018
just can realize that the output voltage vector
Figure FDA0000151946280000019
of wide cut is regulated.
2. do not have the permanent width of cloth vector AC voltage regulator of isolation according to claim 1, it is characterized in that converters circuit one termination has C f(5) L f(6) filter is by main switch T 1～T 8(7) constitute two back-to-back bridge converter structures, be connected to dc energy storage capacitor C on the public direct-current ring Dc(8), the other end is connected with high-frequency isolation transformer T (4).
3. do not have the permanent width of cloth vector AC voltage regulator of isolation according to claim 1, it is characterized in that the permanent width of cloth vector AC voltage regulator circuit of this nothing isolation is by AC power
Figure FDA00001519462800000110
Be input to converters a, behind high-frequency isolation transformer T, be connected with converters b, converter b produces bucking voltage
Figure FDA00001519462800000111
With
Figure FDA00001519462800000112
Sum obtains output voltage
Figure FDA00001519462800000113
Keep
Figure FDA00001519462800000114
Amplitude is constant, only changes relative supply voltage
Figure FDA00001519462800000115
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure FDA00001519462800000116
Promptly U → O = U → S + U → C .
4. do not have the purposes of isolating permanent width of cloth vector AC voltage regulator according to claim 1, it is characterized in that working as supply voltage
Figure FDA00001519462800000118
And load voltage Between do not isolate, it is identical with supply voltage that the frequency of load voltage must keep; This circuit can't be realized frequency conversion, can only realize the adjusting to output voltage, is applicable to do not have AC voltage regulator, AC voltage regulator, interchange phase shifter, the electric power electric transformer of isolating; During as voltage regulator, work as U S=U N, U NBe rated voltage, require output voltage U OAt (0～1.2) * U NBetween change, phase angle [alpha] should be regulated between 180 °～106.26 °; Because α＞90 °, converters b from
Figure FDA00001519462800000120
The place absorbs electric energy, passes to converters a through high-frequency isolation transformer T, feeds back to electrical network to electric energy by converter a then.
CN2012101036552A 2012-04-10 2012-04-10 Non-isolated constant amplitude vector alternating current voltage regulator Pending CN102638171A (en)

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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5469044A (en) * 1995-01-05 1995-11-21 Westinghouse Electric Corporation Transmission line power flow controller with unequal advancement and retardation of transmission angle
JPH1042467A (en) * 1996-07-23 1998-02-13 Kansai Electric Power Co Inc:The Distribution line voltage and reactive power regular
CN201213322Y (en) * 2007-12-24 2009-03-25 北京惠特优宝机电有限公司 Intelligent lighting electricity economizer controlled by IGBT
CN101557096A (en) * 2009-01-21 2009-10-14 湖南大学 Voltage transformer excitation surge current free idle-loaded switching-on controller
CN201489383U (en) * 2009-07-29 2010-05-26 南宁微控技术有限公司 Stepless phase control compensation type AC voltage stabilizing regulator

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5469044A (en) * 1995-01-05 1995-11-21 Westinghouse Electric Corporation Transmission line power flow controller with unequal advancement and retardation of transmission angle
JPH1042467A (en) * 1996-07-23 1998-02-13 Kansai Electric Power Co Inc:The Distribution line voltage and reactive power regular
CN201213322Y (en) * 2007-12-24 2009-03-25 北京惠特优宝机电有限公司 Intelligent lighting electricity economizer controlled by IGBT
CN101557096A (en) * 2009-01-21 2009-10-14 湖南大学 Voltage transformer excitation surge current free idle-loaded switching-on controller
CN201489383U (en) * 2009-07-29 2010-05-26 南宁微控技术有限公司 Stepless phase control compensation type AC voltage stabilizing regulator

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Application publication date: 20120815