CN102638173A - Isolated constant amplitude vector alternating current voltage regulator - Google Patents

Isolated constant amplitude vector alternating current voltage regulator Download PDF

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Publication number
CN102638173A
CN102638173A CN201210103227XA CN201210103227A CN102638173A CN 102638173 A CN102638173 A CN 102638173A CN 201210103227X A CN201210103227X A CN 201210103227XA CN 201210103227 A CN201210103227 A CN 201210103227A CN 102638173 A CN102638173 A CN 102638173A
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voltage
output voltage
converters
frequency
vector
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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 an 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 high-frequency isolated transformer is represented by T (2), a sinusoidal output voltage vector of an electronic power converter b is represented by Upsilon C1 and an sinusoidal output voltage vector of an electronic power converter c is represented by Upsilon C2, an output voltage vector output to a load is represented by Upsilon O, wherein Upsilon C1 and Upsilon S have the same phase, and the phase difference of Upsilon C1 and Upsilon C2 is alpha (6); and the voltage regulator is successively connected with an electric power converter and a voltage regulator circuit into a whole. The 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

The permanent width of cloth vector of a kind of isolated form AC voltage regulator
Technical field
The present invention relates to permanent width of cloth vector (or the permanent width of cloth phasor) AC voltage regulator of a kind of isolated form, the single-phase or three-phase contactless of isolation, stepless, the sinusoidal wave power electronics voltage regulator of wide cut, pressurizer are particularly arranged between power supply and load.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 the permanent width of cloth vector of a kind of isolated form AC voltage regulator is provided, be characterized in: contactless, stepless, the sinusoidal wave power electronics voltage regulator of wide cut, pressurizer that isolation is arranged; 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 of isolated form AC voltage regulator is by input voltage vector
Figure BDA0000151946560000011
the high-frequency isolation transformer T of power supply; The sinewave output voltage vector of converters b
Figure BDA0000151946560000012
and
Figure BDA0000151946560000013
same-phase, the sinewave output voltage vector of converters c
Figure BDA0000151946560000014
outputs to the output voltage vector
Figure BDA0000151946560000015
of load and the phase difference α between
Figure BDA0000151946560000016
; And be in turn connected into integral body through converters circuit, regulator circuit.
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.The permanent width of cloth vector of isolated form AC voltage regulator circuit is input to converters α by AC power
Figure BDA0000151946560000021
; Behind high-frequency isolation transformer T, be connected with converters b, c respectively; The output voltage
Figure BDA0000151946560000022
that is produced by converters b is constant by the amplitude that converters c produces output voltage
Figure BDA0000151946560000023
maintenance
Figure BDA0000151946560000024
and
Figure BDA0000151946560000025
; Change
Figure BDA0000151946560000026
phase angle [alpha], obtain the different sinewave output voltage of amplitude
Figure BDA0000151946560000028
i.e.
Figure BDA0000151946560000029
with respect to
Figure BDA0000151946560000027
The purposes of the permanent width of cloth vector of isolated form AC voltage regulator:
Between supply voltage
Figure BDA00001519465600000210
and load voltage
Figure BDA00001519465600000211
, realize isolating through high frequency transformer T; Thereby the frequency of load voltage and amplitude can be inequality with supply voltage; Therefore; This circuit is suitable as the sinusoidal wave frequency converter of wide cut, and its output voltage amplitude, frequency are all adjustable; Or as the wide cut sinewave inverter, its output voltage frequency is fixed, but different with supply frequency; Or as being with AC voltage regulator, AC voltage regulator, interchange phase shifter, the electric power electric transformer of isolating, at this moment output voltage frequency is identical with supply voltage.
In AC voltage regulator, if U S=U N, U NBe rated voltage, when not considering circuit pressure drop and n=1, require output voltage at (0～1.2) * U NThe interior variation, the adjustable range of α is so: 180 °～106.26 °.Because α＞90 °; Converters c absorbs electric energy from ; Pass to converter α and converter b through high-frequency isolation transformer T, thereby feed back to electrical network to electric energy.
The present invention has following advantage:
(1) realizes contactless, stepless sinusoidal wave power electronics voltage regulator, the pressurizer of isolating of big capacity wide cut.
(2) be applicable to list, three-phase system.
(3) no industrial frequency transformer has reduced weight of equipment and volume.
Description of drawings
Fig. 1 is the permanent width of cloth vector of an isolated form of the present invention AC voltage regulator schematic diagram.
1. 2. high-frequency isolation transformer T of input supply voltage vector
Figure BDA00001519465600000213
, 3. the sine wave output voltage vector of converters b 4. the sine wave output voltage vector of converters c
Figure BDA00001519465600000215
5. output to the output voltage vector
Figure BDA00001519465600000216
of load
Fig. 2 is the converters circuit of the permanent width of cloth vector of isolated form of the present invention AC voltage regulator.
6. the filtering capacitor C of converters f, 7. filter reactor L f, the 8. main switch T of converters 1～T 8, 9. 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 is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage
Figure BDA0000151946560000032
among Fig. 1 as
Figure BDA0000151946560000033
with
Figure BDA0000151946560000034
same-phase; Producing output voltage
Figure BDA0000151946560000035
by converters c keeps the amplitude of
Figure BDA0000151946560000036
and constant; Change
Figure BDA0000151946560000038
phase angle [alpha], just can obtain the different sinewave output voltage of amplitude (i.e.
Figure BDA00001519465600000311
) with respect to
Figure BDA0000151946560000039
.Converters circuit one termination has C f6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.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 °.Output voltage frequency is identical with the supply voltage frequency.
Embodiment 2
AC power
Figure BDA00001519465600000312
is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage
Figure BDA00001519465600000313
among Fig. 1 as
Figure BDA00001519465600000314
with
Figure BDA00001519465600000315
same-phase; Producing output voltage
Figure BDA00001519465600000316
by converters c keeps the amplitude of
Figure BDA00001519465600000317
and constant; Change
Figure BDA00001519465600000319
phase angle [alpha], just can obtain the different sinewave output voltage of amplitude (i.e.
Figure BDA00001519465600000322
) with respect to
Figure BDA00001519465600000320
.Converters circuit one termination has C f6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.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 always can get unique α value (α>=120 °) and make U O=U NRealize (0.5U N≤U S＜∞) the unusual AC voltage-stabilizing of wide cut.Output voltage frequency is identical with the supply voltage frequency.
Embodiment 3
AC power
Figure BDA00001519465600000323
is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage
Figure BDA00001519465600000324
among Fig. 1 as
Figure BDA00001519465600000325
with
Figure BDA00001519465600000326
same-phase; Producing output voltage
Figure BDA0000151946560000041
by converters c keeps the amplitude of and
Figure BDA0000151946560000043
constant; Change
Figure BDA0000151946560000044
phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA0000151946560000046
(i.e. ) with respect to
Figure BDA0000151946560000045
.Converters circuit one termination has Cf 6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.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 BDA0000151946560000048
With respect to input voltage
Figure BDA0000151946560000049
Being changed to of phase difference (0 ° → 45 ° → 90 °).Output voltage frequency is identical with the supply voltage frequency.
Embodiment 4
AC power
Figure BDA00001519465600000410
is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage
Figure BDA00001519465600000411
among Fig. 1 as
Figure BDA00001519465600000412
with
Figure BDA00001519465600000413
same-phase; Producing output voltage by converters c keeps the amplitude of
Figure BDA00001519465600000415
and constant; Change
Figure BDA00001519465600000417
phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA00001519465600000419
(i.e.
Figure BDA00001519465600000420
) with respect to
Figure BDA00001519465600000418
.Converters circuit one termination has C f6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.In sinewave inverter; Change the phase difference α of
Figure BDA00001519465600000421
and
Figure BDA00001519465600000422
, realize the pressure regulation of voltage output; The output voltage frequency of inverter can be different with supply frequency, but its value is constant.
Embodiment 5
AC power is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage
Figure BDA00001519465600000424
among Fig. 1 as
Figure BDA00001519465600000425
with
Figure BDA00001519465600000426
same-phase; Producing output voltage
Figure BDA00001519465600000427
by converters c keeps the amplitude of
Figure BDA00001519465600000428
and
Figure BDA00001519465600000429
constant; Change
Figure BDA00001519465600000430
phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA00001519465600000432
(i.e.
Figure BDA00001519465600000433
) with respect to
Figure BDA00001519465600000431
.Converters circuit one termination has C f6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.In sinusoidal wave frequency converter; Change the frequency and the phase difference α of
Figure BDA00001519465600000434
and , realize the frequency modulation and voltage modulation of output voltage.
Embodiment 6
AC power
Figure BDA00001519465600000436
is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage
Figure BDA00001519465600000437
among Fig. 1 as
Figure BDA00001519465600000438
with same-phase; Producing output voltage
Figure BDA0000151946560000051
by converters c keeps the amplitude of
Figure BDA0000151946560000052
and
Figure BDA0000151946560000053
constant; Change phase angle [alpha], just can obtain the different sinewave output voltage of amplitude (i.e.
Figure BDA0000151946560000057
) with respect to .Converters circuit one termination has C f6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.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 7
AC power
Figure BDA0000151946560000058
is input to converters α; Behind high-frequency isolation transformer T2; By converters b produce output voltage among Fig. 1 as
Figure BDA00001519465600000510
with
Figure BDA00001519465600000511
same-phase; Producing output voltage
Figure BDA00001519465600000512
by converters c keeps the amplitude of
Figure BDA00001519465600000513
and
Figure BDA00001519465600000514
constant; Change
Figure BDA00001519465600000515
phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Figure BDA00001519465600000517
(i.e.
Figure BDA00001519465600000518
) with respect to
Figure BDA00001519465600000516
.Converters circuit one termination has C f6L f7 filters are by main switch T 1～T 88 constitute two back-to-back bridge converter structures, are connected to dc energy storage capacitor C on the public direct-current ring Dc9, the other end is connected with high-frequency isolation transformer T2.Among the embodiment 1～6; Single phase circuit obtains three-phase isolated form AC voltage regulator, three-phase isolated form AC voltage regulator, three-phase isolated form interchange phase shifter, three-phase isolated form sinewave inverter, the sinusoidal wave frequency converter of three-phase isolated form, three-phase isolated form electric power electric transformer successively through triangle or star connection.

Claims (4)

1. the permanent width of cloth vector of isolated form AC voltage regulator; It is characterized in that input voltage vector
Figure FDA0000151946550000011
the high-frequency isolation transformer T (2) of this AC voltage regulator by power supply; The sinewave output voltage vector of converters b
Figure FDA0000151946550000012
as
Figure FDA0000151946550000013
with
Figure FDA0000151946550000014
same-phase, the sinewave output voltage vector of converters c
Figure FDA0000151946550000015
outputs to the output voltage vector
Figure FDA0000151946550000016
of load with the phase difference α between
Figure FDA0000151946550000018
; And be in turn connected into integral body through converters circuit, regulator circuit.
2. the permanent width of cloth vector of isolated form AC voltage regulator according to claim 1 is characterized in that converters circuit one termination has C f(6) L f(7) filter is by main switch T 1～T 8(8) constitute two back-to-back bridge converter structures, be connected to dc energy storage capacitor C on the public direct-current ring Dc(9), the other end is connected with high-frequency isolation transformer T (2).
3. the permanent width of cloth vector of isolated form AC voltage regulator according to claim 1; It is characterized in that the permanent width of cloth vector of isolated form AC voltage regulator circuit is input to converters α by AC power
Figure FDA0000151946550000019
; Behind high-frequency isolation transformer T, be connected with converters b, c respectively; The output voltage that is produced by converters b is constant by the amplitude that converters c produces output voltage
Figure FDA00001519465500000111
maintenance
Figure FDA00001519465500000112
and
Figure FDA00001519465500000113
; Change
Figure FDA00001519465500000114
phase angle [alpha], obtain the different sinewave output voltage of amplitude
Figure FDA00001519465500000116
i.e. with respect to
Figure FDA00001519465500000115
4. the purposes of the permanent width of cloth vector of isolated form AC voltage regulator according to claim 1 is characterized in that: at supply voltage
Figure FDA00001519465500000118
And load voltage
Figure FDA00001519465500000119
Between realize to isolate through high frequency transformer T, thereby the frequency of load voltage can be inequality with supply voltage with amplitude, therefore, this circuit is suitable as wide cut sine wave frequency converter, its output voltage amplitude, frequency are all adjustable; Or as the wide cut sinewave inverter, its output voltage frequency is fixed, but different with supply frequency; Or as being with AC voltage regulator, AC voltage regulator, interchange phase shifter, the electric power electric transformer of isolating, at this moment output voltage frequency is identical with supply voltage; In AC voltage regulator, work as U S=U N, U NBe rated voltage, when not considering circuit pressure drop and n=1, require output voltage at (0～1.2) * U NThe interior variation, the adjustable range of α is so: 180 °～106.26 °.Because α＞90 °; Converters c absorbs electric energy from ; Pass to converter α and converter b through high-frequency isolation transformer T, thereby feed back to electrical network to electric energy.
CN201210103227XA 2012-04-10 2012-04-10 Isolated constant amplitude vector alternating current voltage regulator Pending CN102638173A (en)

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2300940Y (en) * 1997-06-02 1998-12-16 电力工业部电力科学研究院 Quick thyristor-controlled voltage-stabilizer
CN1725620A (en) * 2004-07-22 2006-01-25 郑州正鸿电气有限责任公司 AC-DC two-purpose high voltage small current power supply
WO2006107548A1 (en) * 2005-03-30 2006-10-12 General Electric Company Power converter system and method
CN201035433Y (en) * 2007-02-06 2008-03-12 杭州钱江电气集团股份有限公司 Energy bidirectional flowing voltage regulator
CN101170284A (en) * 2007-09-28 2008-04-30 清华大学 Single-phase integrated power quality controller for electric railway power supply
CN201234391Y (en) * 2008-07-22 2009-05-06 中国电子科技集团公司第五十研究所 Power saving device for lighting
CN101615045A (en) * 2009-07-29 2009-12-30 南宁微控技术有限公司 Stepless phase control compensating-type AC voltage stabilization and regulation device and voltage compensating method thereof
CN101795081A (en) * 2010-03-03 2010-08-04 中国科学院电工研究所 Power electronic transformer having multi-winding isolation transformer
CN101895206A (en) * 2010-06-02 2010-11-24 北京惠特优宝机电有限公司 Alternating current voltage-regulating and voltage-stabilizing device controlled by insulated gate bipolar transistor
CN102291016A (en) * 2011-08-02 2011-12-21 中国电力科学研究院 Electric power quality conditioner for electrified railway

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2300940Y (en) * 1997-06-02 1998-12-16 电力工业部电力科学研究院 Quick thyristor-controlled voltage-stabilizer
CN1725620A (en) * 2004-07-22 2006-01-25 郑州正鸿电气有限责任公司 AC-DC two-purpose high voltage small current power supply
WO2006107548A1 (en) * 2005-03-30 2006-10-12 General Electric Company Power converter system and method
CN201035433Y (en) * 2007-02-06 2008-03-12 杭州钱江电气集团股份有限公司 Energy bidirectional flowing voltage regulator
CN101170284A (en) * 2007-09-28 2008-04-30 清华大学 Single-phase integrated power quality controller for electric railway power supply
CN201234391Y (en) * 2008-07-22 2009-05-06 中国电子科技集团公司第五十研究所 Power saving device for lighting
CN101615045A (en) * 2009-07-29 2009-12-30 南宁微控技术有限公司 Stepless phase control compensating-type AC voltage stabilization and regulation device and voltage compensating method thereof
CN101795081A (en) * 2010-03-03 2010-08-04 中国科学院电工研究所 Power electronic transformer having multi-winding isolation transformer
CN101895206A (en) * 2010-06-02 2010-11-24 北京惠特优宝机电有限公司 Alternating current voltage-regulating and voltage-stabilizing device controlled by insulated gate bipolar transistor
CN102291016A (en) * 2011-08-02 2011-12-21 中国电力科学研究院 Electric power quality conditioner for electrified railway

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Application publication date: 20120815