CN103616912A - Three-winding compensation type alternating-current voltage stabilizer - Google Patents
Three-winding compensation type alternating-current voltage stabilizer Download PDFInfo
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 6
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Abstract
The invention discloses a three-winding compensation type alternating-current voltage stabilizer and solves the problem that regulating accuracy is limited by means of an existing voltage regulating mode that two sets of iron cores with multi-branching taps are adopted. One compensation winding and two regulating windings in each phase are jointly sleeved on a core limb to form the winding being mutually original and secondary sides, and under magnetic coupling conditions, an alternating-current voltage stabilizing circuit containing self-coupling pressure regulating and compensation and isolation technology is jointly formed by a capacitor and switch-type voltage regulator to perform three-phase and bipolar voltage regulation. Voltage values and polarities of the three compensation windings of Wa1, Wb1 and Wc1 change with the two regulating windings, and the three windings are controlled through rectifier bridges (D1-D6) and a tube T1 in Wa2, Wb2 and Wc2, so that the compensation winding is enabled to change output voltage by means of boosting. The regulators are used for converting three-phase alternating-current voltage into direct current via three-phase rectification, and a power electronic device can be switched off through the T1 or T2 and direct-current voltage regulation can be performed in a PWM (pulse-width modulation) mode. The three-winding compensation type alternating-current voltage stabilizer has the advantages of being small in distortion of voltage waveform and simple in structure.
Description
Technical field
The invention belongs to and exchange stabilized power source and field transformer, particularly a kind of three winding offset-type AC stabilizer.
Background technology
At present, the three-phase power voltage regulator on market belongs to high-power offset-type alternating current steady voltage plug, three-phase regulator, compensator transformer, servomotor and gear train, sample detecting and control circuit etc., partly consists of.The secondary winding of its compensator transformer is connected in supply line, by changing size and the polarity of voltage on its armature winding, changes size and the polarity of bucking voltage; Three-phase regulator is three-phase pillar autotransformer, by means of servomotor, drives carbon brush to slide up and down along the exposed part of drum type brake winding, thus the size of regulation output voltage and polarity.This voltage-regulation mode not only complex structure and also reaction slower, two electromagnetic device also must bring the problem that loss is larger.Chinese patent Double zigzag connecting wire phase-shifting voltage regulator (00235152.8), adopt two groups of tri-phase iron cores, three former limit windings and three combination pressure regulation windings, utilize the self coupling effect of three combination pressure regulation windings to make former limit winding generation phase shift and numerical value change, and make the secondary winding of connecting between two from bearing the change in voltage of one zero one positive scopes, thereby obtain stable voltage.This voltage regulating mode still will with two groups unshakable in one's determination, and its three to 15 shunting taps limit to its pressure regulation precision to some extent.Manage to carry out high-power and continuous adjusting with one group of three-phase iron core and winding, relate in self-coupling technical foundation the problem that comprises that the multiple AC voltage adjusting technology of switching mode AC voltage-stabilizing combines.
Summary of the invention
The present invention aims to provide and a kind ofly only with one group of three-phase iron core, carries out voltage-regulation and voltage compensation simultaneously, and three of star-star connection winding neutral ends is carried out to the three winding offset-type AC stabilizer that regulate continuously in order to the regulator of a control three.
The technical scheme of three winding offset-type AC stabilizer of the present invention is: adopt three-phase unshakable in one's determination, compensation winding, regulate winding, capacitor, the devices such as regulator and detection controller form, described three-phase compensation winding Wa1, Wb1, two groups of adjusting winding Wa2 of Wc1 and three-phase and Wa3, Wb2 and Wb3, Wc2 and Wc3 are sleeved on three stems of three-phase iron core, and a compensation winding and two adjusting windings of every phase are connected according to Wa2 end and Wa1 head end and draw A2 end, Wa3 head end and Wa1 end are connected and draw A3 end, Wb2 end and Wb1 first are connected and draw B2 end, Wb3 head end and Wb1 end are connected and draw B3 end, Wc2 end and Wc1 head end are connected and draw C2 end, Wc3 head end and Wc1 end are connected and draw C3 end, three windings of every phase connect respectively with identical head end direction, three (group) capacitor C01, C02, C03 are connected in Wa2 head end and Wb3 end, Wb2 head end and Wc3 end successively, Wc2 head end and Wa3 end.Regulator is unified into three-phase commutation bridge with six commutator tubes respectively, and at its direct current two ends, with positive pole, connect anode mode and connect one and turn-off only power electronic devices T1 or T2, wherein three of D1-D6 rectifier bridge input ends are connected in the head end of Wa2, Wb2, tri-windings of Wc2, three input ends of D7-D12 rectifier bridge are connected in the end of Wa3, Wb3, tri-windings of Wc3, carry out voltage-regulation respectively by T1 or T2 and PWM mode thereof.
Further, every two windings that have mutually the identical number of turn of described adjusting winding, compensation winding is 1:4-9 with regulating the coil ratio of winding; Described capacitor C01, C02, the load voltage value of C03 are chosen as 2 times of values that regulate winding maximum voltage (effective value), and condenser current is chosen as the ratio of 1-3:3 with regulating winding maximum current (effective value); The T1 of described regulator and T2 IGBT(igbt) or GTO(gate turn off thyristor), and PWM control (width modulation) is carried out in the triangular carrier that is 5-10KHZ by frequency and DC voltage comparison.
Principle of work of the present invention is: one of every phase compensation winding and two adjusting windings be jointly sleeved on a core limb, form former each other, pay under the winding and magnetic circuit coupling condition on limit, then comprise self-coupling, compensate isolation technology and carry out three-phase and ambipolar voltage-regulation in interior AC voltage-stabilizing circuit by the common formation of pressure regulator of capacitor and switching mode, three magnitude of voltage and polarity that compensate winding Wa1, Wb1, Wc1 regulate windings to become with two groups, in Wa3, Wb3, tri-controls that regulate winding to be subject to D7-D12 rectifier bridge and T2 pipe of Wc3, its winding voltage can change from zero between specified phase voltage, compensation winding changes output voltage with step-down form, at Wa2, Wb2, tri-of Wc2, regulate winding controlled by D1-D6 rectifier bridge and T1 pipe, can make to compensate winding and change output voltage with the form of boosting, two regulators are that three-phase alternating voltage is become to direct current through three phase rectifier, with T1 or T2, can turn-off power electronic devices again and PWM mode is carried out the adjusting of DC voltage, its triangular carrier frequency is 3-10KHZ, with DC voltage amount, forms more afterwards the control signal that each pulsewidth is equal, can, with the increase gradually of its conducting pulse width, the voltage of ac input end be reduced gradually, it is respectively the three-phase star-star connection that neutral end disconnects that two groups of three-phases regulate winding, and carry out voltage-regulation at its three neutral ends connection three-phase commutation bridges, for example, when Wa2 and Wb2 two regulates the voltage of relative other winding of winding head end larger, the through-flow loop of Wa2-D5-T1-D6-Wb2 will be formed, and with the increase gradually of T1 pipe pulse width, two regulates the voltage effective value of winding head end to reduce gradually, when the full conducting of T1 pipe, the magnitude of voltage of two winding head ends is zero, thereby makes to regulate the voltage effective value of winding to reach the phase voltage value of power supply, variation with A2, B2, C2 tri-end alternating voltages, three regulate winding through D1 or D3 or D5 and the T1 pipe that arrives, again through D2 or D4 or D6, with the rule of π/3, interval and through-flow 2/3 π electrical angle, carry out the change of current successively, and utilize three-phase core limb to make each winding form the sine voltage that amplitude changes to the magnetic circuit coupling of each phase winding and the filter action of capacitor, turn-off device T1(T2) the quick break-make mode of PWM certainly will will cause harmonic voltage, and under it does not arrange the condition of feedback rectification, also to form it and be difficult to the problem of turn-offing, the C01 supporting with it, C02, tri-power capacitors of C03 are existing carries out interior compensation to the perceptual energy in winding, also has the function of the harmonic voltage of each winding generation being eliminated in its X-bracing mode, when the T1(T2 in a certain period) pipe moment turn-offs, the inductance current of flowing through in winding just forms through-flow loop via joined capacitor, and the wheel of planting electromagnetic energy with capacitive with this perception is wandered to transmit and is made it have the function that regulates reactive power (power factor) concurrently, at a compensation winding, join respectively two and regulate winding, and connect by interleaved mode the combination wiring that capacitor forms, for with turn-off device, DC voltage being regulated to the reliable change of current condition that provides again after rectification, in the scope of the voltage effective value of its capacitor with control on-Line Voltage to the 2 times phase voltage value of regulator, change, compensation winding and two adjusting windings in series in every phase, when the neutral end of three phase windings is untied and is connected in the three-phase commutation bridge of regulator, just the turn-off device of use having formed with a control three (six) carries out the condition of voltage-regulation to three phase windings, and with three capacitors, can form the feature of second current path, make T1 or the T2 pipe of width modulation can lead to rapidly-break, from face, the voltage-regulation of three phase windings is simplified.
It is less that the present invention has voltage waveform distortion compared with three-phase thyristor voltage-regulating technique, the compensation voltage stabilizing technology of sliding compared with brush has advantages of simple in structure low with cost, and to carry out the feature of reactive-load compensation in its hand over-straight voltage-regulation simultaneously, contributes to the technical progress of AC voltage-stabilizing.
Accompanying drawing explanation
Fig. 1 is the major loop wiring diagram of three winding offset-type AC voltage-stabilizing technology.
Embodiment
Embodiment 1
Adopt the three-phase legged magnetic core of 80KVA dry-type transformer make compensation and regulate shared pressure regulator, its key technical indexes is: three-phase input voltage is 304-456V; Output capacity 320KVA; Response time is less than 20ms; Waveform distortion is less than 3%; Loss 1%(mean value); Power factor improves 0.1(mean value).Its compensation winding is pressed 44V design, and Wa2, Wb2, tri-of Wc2 regulate winding (boosting) 176V design, and Wa3, Wb3, tri-of Wc3 regulate winding (step-down) to press 220V design, and the design capacity of three groups of windings equates.Three (group) capacitor C01, C02, C03 select the Monophase electric power capacitor of 460-500V rated voltage, and the rated capacity of three power capacitors is 15%-20% of voltage stabilizer capacity.It is inner ring (near stem) that the suit of each winding sequentially adopts compensation winding, regulate winding is centre circle and outer ring, successively three drum type coils of every phase is sleeved on three stems, and its Winding Design, makes and also adopt conventional technical manual.The connecting mode of winding is: Wa2 end and Wa1 head end are connected and draw A2 end, Wa3 head end and Wa1 end are connected and draw A3 end, Wb2 end and Wb1 head end are connected and draw B2 end, Wb3 head end and Wb1 end are connected and draw B3 end, Wc2 end and Wc1 head end are connected and draw C2 end, Wc3 head end and Wc1 end are connected and draw C3 end, and three windings of every phase are in series and have respectively the mode of connection of four terminals with identical head end direction; Three (group) capacitor C01, C02, C03 are connected between Wa2 head end and three pairs of terminals of Wb3 end, Wb2 head end and Wc3 end, Wc2 head end and Wa3 end successively; Regulator is unified into three-phase commutation bridge with six commutator tubes respectively, and at its direct current two ends, with positive pole, connect anode mode and connect IGBT pipe (igbt), wherein three ac input ends of D1-D6 rectifier bridge are connected in the head end of Wa2, Wb2, tri-windings of Wc2, three interchange ends of D7-D12 rectifier bridge are connected in the end of Wa3, Wb3, tri-windings of Wc3, and control with PWM.
The regulator that D1-D6 and T1 form enters work lower than 380V or while setting output valve at three-phase input AC line voltage effective value, the regulator that D7-D12 and T2 form enters work when higher than setting output valve (380 ± 1-5%V), and both can not work simultaneously.Three (group) capacitors had both made also can via the loop that regulates winding and compensation winding to form, not have the voltage close to line voltage value respectively when two regulators all enter working condition, and for example C01 capacitor can form through-flow loop via A2-Wa2-C01-Wb3-Wb1-B2; When the T1 regulating or T2 pipe enter PWM work, the numerical value of its condenser voltage slightly raises and close to 2 times of phase voltage value, with it, on the one hand the perceptual power of load is carried out to balance, the harmonic voltage producing when also PWM is controlled with it carries out filtering and is sinusoidal wave, also can utilize its in the alternately change of current of six commutator tubes for regulating winding that through-flow loop is provided.
The IGBT pipe of the T1 of alternation or T2 adopts the carrier frequency of leg-of-mutton 8KHZ and control signal that JC sample detecting device provides to compare, JC is from A3, B3, C3, tetra-exit point samplings of O, after rectifying and wave-filtering with the upper and lower bound comparison of reference voltage, output control signal, and then control T1 or T2 pipe ,-until voltage stabilizer output approaches ratings.
Claims (2)
1. a winding offset-type AC stabilizer, comprise that three-phase is unshakable in one's determination, compensation winding, regulate winding, capacitor, regulator and detection controller, it is characterized in that: described three-phase compensation winding Wa1, Wb1, two groups of adjusting winding Wa2 of Wc1 and three-phase and Wa3, Wb2 and Wb3, Wc2 and Wc3 are sleeved on three stems of three-phase iron core, and a compensation winding and two adjusting windings of every phase are connected according to Wa2 end and Wa1 head end and draw A2 end, Wa3 head end and Wa1 end are connected and draw A3 end, Wb2 end and Wb1 first are connected and draw B2 end, Wb3 head end and Wb1 end are connected and draw B3 end, Wc2 end and Wc1 head end are connected and draw C2 end, Wc3 head end and Wc1 end are connected and draw C3 end, three windings of every phase connect respectively with identical head end direction, three (group) capacitor C01, C02, C03 are connected in Wa2 head end and Wb3 end, Wb2 head end and Wc3 end successively, Wc2 head end and Wa3 end, regulator is unified into three-phase commutation bridge with six commutator tubes respectively, and at its direct current two ends, with positive pole, connect anode mode and connect one and turn-off only power electronic devices T1 or T2, wherein three of D1-D6 rectifier bridge input ends are connected in the head end of Wa2, Wb2, tri-windings of Wc2, three input ends of D7-D12 rectifier bridge are connected in the end of Wa3, Wb3, tri-windings of Wc3, carry out voltage-regulation respectively by T1 or T2 and PWM mode thereof.
2. a kind of three winding offset-type AC stabilizer according to claim 1, is characterized in that, every two windings that have mutually the identical number of turn of described adjusting winding, and compensation winding is 1:4-9 with regulating the coil ratio of winding; Described capacitor C01, C02, the load voltage value of C03 are chosen as 2 times of values that regulate winding maximum voltage, the ratio that condenser current and adjusting winding maximum current selection are 1-3:3; Igbt or gate turn off thyristor for the T1 of described regulator and T2, and pulse width modulation controlled is carried out in the triangular carrier that is 5-10KHZ by frequency and DC voltage comparison.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2290079Y (en) * | 1997-05-16 | 1998-09-02 | 南宁微控高技术有限责任公司 | Combination compensating voltage stabilizer |
| CN2497351Y (en) * | 2001-09-20 | 2002-06-26 | 徐正华 | Microcomputer-controlled compensating A.C. voltage stabilizer |
| CN2497350Y (en) * | 2001-08-19 | 2002-06-26 | 周熙文 | High-power non-wear compensating power stabilizer |
| US20040090200A1 (en) * | 2002-11-08 | 2004-05-13 | Samsung Electronics Co., Ltd. | Power supply apparatus for motor and control method thereof |
| JP2005208771A (en) * | 2004-01-20 | 2005-08-04 | Tokiko Techno Kk | Three-phase four-wire system power adjustment device |
| CN200969558Y (en) * | 2006-08-02 | 2007-10-31 | 成都首光科技发展有限公司 | Power-saving device fit for low-voltage three phase electric appliance |
| CN203588102U (en) * | 2013-11-23 | 2014-05-07 | 国家电网公司 | Three-winding compensation type alternating voltage stabilizing device |
-
2013
- 2013-11-23 CN CN201310593370.6A patent/CN103616912B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2290079Y (en) * | 1997-05-16 | 1998-09-02 | 南宁微控高技术有限责任公司 | Combination compensating voltage stabilizer |
| CN2497350Y (en) * | 2001-08-19 | 2002-06-26 | 周熙文 | High-power non-wear compensating power stabilizer |
| CN2497351Y (en) * | 2001-09-20 | 2002-06-26 | 徐正华 | Microcomputer-controlled compensating A.C. voltage stabilizer |
| US20040090200A1 (en) * | 2002-11-08 | 2004-05-13 | Samsung Electronics Co., Ltd. | Power supply apparatus for motor and control method thereof |
| JP2005208771A (en) * | 2004-01-20 | 2005-08-04 | Tokiko Techno Kk | Three-phase four-wire system power adjustment device |
| CN200969558Y (en) * | 2006-08-02 | 2007-10-31 | 成都首光科技发展有限公司 | Power-saving device fit for low-voltage three phase electric appliance |
| CN203588102U (en) * | 2013-11-23 | 2014-05-07 | 国家电网公司 | Three-winding compensation type alternating voltage stabilizing device |
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