CN102638171A - Non-isolated constant amplitude vector alternating current voltage regulator - Google Patents
Non-isolated constant amplitude vector alternating current voltage regulator Download PDFInfo
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- 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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- vector
- voltage regulator
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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
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
the converters a of bucking voltage vector
load of input voltage vector
the converters b generation of power supply; Bucking voltage
is with respect to the phase difference α of supply voltage
; Do not change the size of
; Only the phase angle [alpha] of adjustment
relative
just can realize that the output voltage vector
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
; Behind high-frequency isolation transformer T, be connected with converters b; Converter b generation bucking voltage
and
sum obtains output voltage
and keeps
amplitude constant; Only change the phase angle [alpha] of relative supply voltage
, just can obtain the different sinewave output voltage of amplitude
i.e.
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
, 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
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
2. power electronic converters b sine wave output voltage vector
3. output to the load output voltage vector
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.
AC power
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
With
Sum obtains output voltage
Keep
Amplitude is constant, only changes relative supply voltage
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
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 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 °.
AC power
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
With
Sum obtains output voltage
Keep
Amplitude is constant, only changes relative supply voltage
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
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 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.
AC power
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
With
Sum obtains output voltage
Keep
Amplitude is constant, only changes relative supply voltage
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
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 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
With respect to input voltage
Being changed to of phase difference (0 ° → 45 ° → 90 °).
Embodiment 4
AC power
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
With
Sum obtains output voltage
Keep
Amplitude is constant, only changes relative supply voltage
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
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
Be input to converters a, behind high-frequency isolation transformer T4, be connected with converters b, converter b produces bucking voltage
With
Sum obtains output voltage
Keep
Amplitude is constant, only changes relative supply voltage
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
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
the converters a of bucking voltage vector
load of input voltage vector
the converters b generation of power supply; Bucking voltage
is with respect to the phase difference α of supply voltage
; Do not change the size of
; Only the phase angle [alpha] of adjustment
relative
just can realize that the output voltage vector
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
Be input to converters a, behind high-frequency isolation transformer T, be connected with converters b, converter b produces bucking voltage
With
Sum obtains output voltage
Keep
Amplitude is constant, only changes relative supply voltage
Phase angle [alpha], just can obtain the different sinewave output voltage of amplitude
Promptly
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
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
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.
Priority Applications (1)
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CN2012101036552A CN102638171A (en) | 2012-04-10 | 2012-04-10 | Non-isolated constant amplitude vector alternating current voltage regulator |
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---|---|---|---|
CN2012101036552A CN102638171A (en) | 2012-04-10 | 2012-04-10 | Non-isolated constant amplitude vector alternating current voltage regulator |
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Citations (5)
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 |
-
2012
- 2012-04-10 CN CN2012101036552A patent/CN102638171A/en active Pending
Patent Citations (5)
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 |