CN100442626C - Series active AC voltage quality regulator and controlling method - Google Patents
Series active AC voltage quality regulator and controlling method Download PDFInfo
- Publication number
- CN100442626C CN100442626C CNB2006100429169A CN200610042916A CN100442626C CN 100442626 C CN100442626 C CN 100442626C CN B2006100429169 A CNB2006100429169 A CN B2006100429169A CN 200610042916 A CN200610042916 A CN 200610042916A CN 100442626 C CN100442626 C CN 100442626C
- Authority
- CN
- China
- Prior art keywords
- controllable silicon
- voltage
- phase
- energy storage
- storage device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The present invention discloses a series active AC voltage quality regulator and a controlling method thereof. A charging and energy storing device is formed by the structure that an anode of controlled silicon V1 is connected with a cathode of controlled silicon V2 and then connected with an output end of an insulating transformer 2; an anode of controlled silicon V3 is connected with a cathode of controlled silicon V4 and then connected with another output end of the isolating transformer 2; a cathode of the controlled silicon V 1 is connected in parallel with a cathode of the controlled silicon V3 and then connected with an anode of a capacitor C; an anode of the controlled silicon V2 is connected in parallel with an anode of the controlled silicon V4 and then connected with a cathode of the capacitor C. The series active AC voltage quality regulator of the present invention can be adaptive to adjust voltage on the direct current side of an inverter and has voltage stabilization and filtering to an AC power supply in a power distribution system, and the power supply voltage quality of the AC power supply is improved. The active AC voltage quality regulator has high voltage stabilization capacity and high filtering capacity even under the condition of the fluctuation of the supply voltage frequency.
Description
Technical field
The invention belongs to electrical technology field, but particularly a kind of self adaptation is adjusted the series active AC voltage quality regulator and the control method of dc voltage.
Background technology
Along with development of modern science and technology, on the one hand, various complexity, precision, constantly universal to the power consumption equipment of quality of power supply sensitivity, people are more and more higher to the requirement of the quality of power supply and reliability; On the other hand, cause the factor of power quality problem constantly to increase, the contradiction of the problems referred to above is more and more outstanding.
Power quality problem can be summed up as the quality of voltage problem of quality of voltage problem, particularly common node mostly.The various interference that line voltage exists, as voltage raise, fall, transition, harmonic wave etc., to cause some important loads or to the normal use of quality of voltage sensitive equipment, performance reduce, the lost of life, also can cause some production equipments normally to move even to damage, serious quality of voltage problem also might cause a serious accident.
At present, a traditional technology method of solution quality of voltage problem is to adopt the alternating current steady voltage plug device.Alternating current steady voltage plug has obtained extensive use at industrial and mining enterprises, national defence scientific research, Medical Devices, household electrical appliance etc. aspect many.Through years development, alternating current steady voltage plug has become an important branch of power technology.
But existing various alternating current steady voltage plug also exists tangible deficiency.Parameter voltage stabilizator, it constitutes according to the voltage stabilizing transformer principle.Advantage: voltage stabilized range is wide, has certain filter capacity; Circuit is simple, the reliability height.Shortcoming: workload-adaptability is poor, big to frequency change sensitivity, volume.High-power offset-type pressurizer, it mainly is made up of compensator transformer and detection control circuit etc., does not have filter capacity.The purification type AC voltage regulator is to utilize the controllable silicon phase shift to form variable inductance, reallocates with the storage and the release of other inductance capacitance offset of sinusoidal energy of major loop, realizes voltage stabilizing, correction signal and jamproof function.Advantage: the efficient height, dynamic response is fast, antijamming capability is strong, and certain filter capacity is arranged.Shortcoming: very sensitive to frequency change, the adaptive load ability.
Sum up the characteristics of above-mentioned various alternating current steady voltage plugs, their voltage regulation performance all is extraordinary, and its performance all is to be realized by the adjustment of passive parameter basically, thereby their filter capacity is very limited.And passive parameter is very responsive to frequency change, and this just causes above-mentioned several alternating current steady voltage plug under the situation of mains frequency fluctuation, voltage regulation performance variation and being easy to and electrical network generation resonance, cisco unity malfunction.
The develop rapidly of power electronic technology, nonlinear-loads such as various power electronic equipments, equipment are widely used, voltage harmonic content in the electrical network is more and more higher, serious day by day to the quality of voltage influence, above-mentioned several alternating current steady voltage plugs can not satisfy various demands to the quality of voltage sensitive load at present.For this reason, people have proposed many quality of voltage control device that utilize power electronic technology to realize.
For the sensitive load end, a kind of direct effective measures that solve the quality of voltage problem are to install series active quality of voltage adjuster between electrical network and sensitive load additional, by injecting the quality of voltage that bucking voltage guarantees the sensitive users end to electrical network.Because tandem arrangement only needs the distortion of bucking-out system voltage and differs part with rated value, and most of energy still directly offers load by electrical network, so they have higher efficient usually.Similar therewith device has Series active power filter, dynamic electric voltage recovery device and unified electric energy regulator etc. at present.Series active quality of voltage adjuster can big (overvoltage or under-voltage), voltage waveform seriously distort, are used for when deviation appears in frequency of supply guaranteeing the supply power voltage quality of sensitive users side at load side voltage and rated value deviation, and can suppress the electrical network vibration, be a kind of very desirable quality of voltage control device.
But, existing series active AC voltage quality regulator to the dc energy storage capacitor electrode be pressed with do not control, have control it as steady state value, the difference that can not follow line voltage and rated output voltage automatically changes, and usually by the most abominable operating condition---maximum damaged voltage design dc voltage value.Compare less and electrical network is in the time probability of bad working environments.When the damaged voltage of system hour, the bucking voltage of the required output of inverter is also less, the duty ratio of inverter is less, the loss height of inverter, its operating efficiency is also just very low.Even when the damaged voltage of system was zero, inverter was also worked under higher direct voltage, and this is very irrational.On the other hand, dc voltage is higher, inverter duty cycle hour, the dead band influence of inverter work is more serious, and then will influence the compensation performance of series active AC voltage quality regulator.
For the gradual of low-voltage distribution system or steady state voltage quality problems, dc voltage is not controlled or is kept constant, and the difference variation that can not follow line voltage and rated output voltage automatically is the high not enough one of the main reasons of present series active quality of voltage adjuster long-time running operating efficiency.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art deficiency, propose a kind of series active AC voltage quality regulator and control method, can improve its operating efficiency and compensation performance.
Technical scheme of the present invention is achieved in that
A kind of series active AC voltage quality regulator comprises, a single-phase isolating transformer 2 that is connected with power supply 1, and a winding of single-phase isolating transformer 2 links to each other with first kind of single-phase charging and energy storage device 3; First kind of single-phase charging and energy storage device 3 link to each other with an end of inverter 4, and the other end of inverter 4 links to each other with output filter 5; One end of output filter 5 links to each other with inverter 4, and first end points (a) in another end points of output filter 5 links to each other with power supply 1, second end points (c) links to each other with load 7; By-pass switch 6 one ends link to each other with power supply 1, and the other end links to each other with load 7; Control system 8 links to each other with power supply 1, first kind of single-phase charging and energy storage device 3, inverter 4, output filter 5, by-pass switch 6, load 7 various pieces respectively;
Described first kind of single-phase charging and energy storage device 3 are made up of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4) and capacitor (C), the anode of the 1st controllable silicon (V1) of first kind of single-phase charging and energy storage device 3 with link to each other with first exit point (h) of single-phase isolating transformer 2 again after the negative electrode of the 2nd controllable silicon (V2) links to each other; The anode of the 3rd controllable silicon (V3) with link to each other with second exit point (g) of single-phase isolating transformer 2 again after the negative electrode of the 4th controllable silicon (V4) links to each other; The negative electrode of the 1st controllable silicon (V1) with link to each other with the positive pole of capacitor (C) again after the negative electrode of the 3rd controllable silicon (V3) is connected; The anode of the 2nd controllable silicon (V2) with link to each other with the negative pole of capacitor (C) again after the anode of the 4th controllable silicon (V4) is connected;
When the voltage of power supply 1 is higher than load 7 required rated voltages, close the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3) and the 4th controllable silicon (V4), at this moment, the voltage on the capacitor (C) is by the voltage (V of inverter 4 according to phase-shift controller 12 and power supply 1
S) voltage instruction (V that forms
Ref) turn-on and turn-off of all-controlling power electronics device the 1st igbt (V5), the 2nd igbt (V6), the 3rd igbt (V7), the 4th igbt (V8) are carried out pulse width modulation control;
When power source voltage is lower than load 7 required rated voltages, control by the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3) and the 4th controllable silicon (V4) the triggering and conducting angle of 11 pairs of first kind of single-phase chargings of charge circuit controller and energy storage device 3:
When the voltage on the capacitor (C) was higher than the setting direct voltage, the triggering and conducting angle of reducing the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4) made that the direct voltage on the capacitor (C) descends;
When the voltage on the capacitor (C) is lower than when setting direct voltage, increase the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), make DC voltage rising on the capacitor (C);
When the size of the supply voltage of electrical network and waveform satisfy load request is that network operation is normal, under the normal situation of network operation, do not need compensation, at this moment by-pass switch 6 closures, single-phase isolating transformer 2, first kind of single-phase charging and energy storage device 3, inverter 4, output filter 5 quit work;
When electric network source voltage is higher than the required rated voltage of load or supply voltage is lower than the required rated voltage of load, and the supply voltage harmonic content is that network operation is undesired when surpassing load request, under the abnormal situation of network operation, need compensation, at this moment by-pass switch 6 disconnects, and power supply 1, single-phase isolating transformer 2, first kind of single-phase charging and energy storage device 3, inverter 4, output filter 5 are started working.
Described second kind of single-phase charging and energy storage device 3 are anodes of forming the 1st controllable silicon (V1) in second kind of single-phase charging and 3, the second kinds of single-phase chargings of energy storage device and the energy storage device 3 with the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 1st diode (VD1), the 2nd diode (VD2) and capacitor (C) and link to each other with first exit point (h) of single-phase isolating transformer 2 after the negative electrode of the 1st diode (VD1) links to each other again; The anode of the 2nd controllable silicon (V2) with link to each other with second exit point (g) of single-phase isolating transformer 2 again after the negative electrode of the 2nd diode (VD2) links to each other; The negative electrode of the 1st controllable silicon (V1) with link to each other with the positive pole of capacitor (C) again after the negative electrode of the 2nd controllable silicon (V2) is connected; The anode of the 1st diode (VD1) with link to each other second kind of single-phase charging forming and connect with institute and energy storage device first kind of single-phase charging of 3 replacements and energy storage device 3 after the anode of the 2nd diode (VD2) is connected again with the negative pole of capacitor (C).
Described the third single-phase charging and energy storage device 3 are to form the third single-phase charging and energy storage device 3 with the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 1st diode (VD1), the 2nd diode (VD2) and capacitor (C), the anode of the 1st controllable silicon (V1) in the third single-phase charging and the energy storage device 3 with link to each other with first exit point (h) of single-phase isolating transformer 2 again after the negative electrode of the 2nd controllable silicon (V2) links to each other; The anode of the 1st diode (VD1) with link to each other with second exit point (g) of single-phase isolating transformer 2 again after the negative electrode of the 2nd diode (VD2) links to each other; The negative electrode of the 1st controllable silicon (V1) with link to each other with the positive pole of capacitor (C) again after the negative electrode of the 1st diode (VD1) is connected; The anode of the 2nd controllable silicon (V2) with link to each other with the negative pole of capacitor (C) again after the anode of the 2nd diode (VD2) is connected, single-phase charging of the third that form and connect and energy storage device 3 replace first kind of single-phase charging and energy storage device 3.
A kind of series active AC voltage quality regulator comprises, a three-phase isolation transformer 2 that is connected with power supply 1, and a winding of three-phase isolation transformer 2 links to each other with charging and energy storage device 3; Three-phase charging and energy storage device 3 link to each other with an end of inverter 4, and the other end of inverter 4 links to each other with output filter 5; One end of output filter 5 links to each other with inverter 4, and first end points (a) in another end points of output filter 5 links to each other with power supply 1, second end points (c) links to each other with load 7; By-pass switch 6 one ends link to each other with power supply 1, and the other end links to each other with load 7; Control system 8 respectively with power supply 1, three-phase charging and energy storage device 3, inverter 4, output filter 5, by-pass switch 6, load 7 various pieces link to each other, described three-phase charging and energy storage device 3 are by the 10th controllable silicon (V0), the 9th controllable silicon (V9), the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4) and capacitor (C) are formed, the anode of the 10th controllable silicon (V0) in three-phase charging and the energy storage device 3 with link to each other with first exit point (f) of three-phase isolation transformer 2 again after the negative electrode of the 9th controllable silicon (V9) links to each other; The anode of the 1st controllable silicon (V1) with link to each other with second exit point (g) of three-phase isolation transformer 2 again after the negative electrode of the 2nd controllable silicon (V2) links to each other; The anode of the 3rd controllable silicon (V3) with after the negative electrode of the 4th controllable silicon (V4) links to each other again the 3rd exit point (h) of three-phase isolation transformer 2 link to each other; After being connected, the negative electrode of the negative electrode of the 10th controllable silicon (V0) and the 1st controllable silicon (V1) and the negative electrode of the 3rd controllable silicon (V3) link to each other with the positive pole of capacitor (C) again; After being connected, the anode of the anode of the 9th controllable silicon (V9) and the 2nd controllable silicon (V2) and the anode of the 4th controllable silicon (V4) link to each other with the negative pole of capacitor (C) again;
When the voltage of power supply 1 is higher than load 7 required rated voltages, close the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), the 10th controllable silicon (V0), the 9th controllable silicon (V9), at this moment, the voltage on the capacitor (C) is by the voltage (V of inverter 4 according to phase-shift controller 12 and power supply 1
S) voltage instruction (V that forms
Ref) turn-on and turn-off of all-controlling power electronics device the 1st igbt (V5), the 2nd igbt (V6), the 3rd igbt (V7), the 4th igbt (V8) are carried out pulse width modulation control;
When power source voltage was lower than load 7 required rated voltages, the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3) and the 4th controllable silicon (V4) by charging of the 11 pairs of three-phases of charge circuit controller and energy storage device 3, the 10th controllable silicon (V0), the 9th controllable silicon (V9) was controlled:
When the voltage on the capacitor (C) is higher than the setting direct voltage, reduce the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), the 10th controllable silicon (V0), the 9th controllable silicon (V9), make that the direct voltage on the capacitor (C) descends;
When the voltage on the capacitor (C) is lower than the setting direct voltage, increase the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), the 10th controllable silicon (V0), the 9th controllable silicon (V9), make DC voltage rising on the capacitor (C);
When the size of the supply voltage of electrical network and waveform satisfy load request is that network operation is normal, under the normal situation of network operation, do not need compensation, at this moment by-pass switch 6 closures, three-phase isolation transformer 2, three-phase charging and energy storage device 3, inverter 4, output filter 5 quit work;
When electric network source voltage is higher than the required rated voltage of load or supply voltage is lower than the required rated voltage of load, and the supply voltage harmonic content is that network operation is undesired when surpassing load request, under the abnormal situation of network operation, need compensation, at this moment by-pass switch 6 disconnects, and power supply 1, three-phase isolation transformer 2, three-phase charging and energy storage device 3, inverter 4, output filter 5 are started working.
The present invention proposes the series active AC voltage quality regulator topological structure and the control method thereof of controlled charge circuit, but self adaptation is adjusted inverter direct-flow side voltage.This topological structure cooperates the control method of being invented to carry out voltage stabilizing and filtering to the AC power in the distribution system, improves the supply power voltage quality of AC power.Even under the situation of supply power voltage frequency fluctuation, this active AC voltage quality controller also has higher voltage stabilizing ability and filtering performance.
The present invention has following characteristics:
(1) charging that AC voltage quality is regulated and controlled and energy storage device and inverter are to be connected between power supply and the load, thereby only the deviation that causes the quality of voltage problem is controlled, part inversion control just, required energy to be processed is little, thereby the volume of formation AC voltage quality regulator is little, conversion efficiency is high.
(2) charging and energy storage device have adopted controllable mode, can control charge condition and the voltage of energy storage capacitor C according to the load required voltage, improve unit efficiency.
(3) any one breaks down in isolating transformer, charging and energy storage device, inverter and output filter, when the series active AC voltage quality controller can not often be worked, the control by-pass switch makes its closure, the energy of power supply directly can be outputed to load without regulating, the electric energy of proof load does not interrupt.
Description of drawings
Fig. 1 is the topology diagram of a kind of single-phase series active AC voltage quality regulator of the present invention;
Fig. 2 is a control system block diagram of the present invention;
Fig. 3 is second kind of single-phase charging of the present invention and energy storage device topology diagram;
Fig. 4 is the third single-phase charging of the present invention and energy storage device topology diagram;
Fig. 5 is three-phase charging of the present invention and energy storage device topology diagram;
Fig. 6 is the topology diagram that adopts the three-phase series active AC voltage quality regulator of single-phase controlled charge circuit formation;
Fig. 7 is the topology diagram that adopts the three-phase series active AC voltage quality regulator of the controlled charge circuit formation of three-phase.
Embodiment
With reference to shown in Figure 1, it is made up of power supply 1, single-phase isolating transformer 2, first kind of single-phase charging and energy storage device 3, inverter 4, output filter 5, by-pass switch 6, load 7 and control system 8.One end of single-phase isolating transformer 2 links to each other with power supply 1, and the other end links to each other with first kind of single-phase charging and energy storage device 3; One end of inverter 4 links to each other with first kind of single-phase charging and energy storage device 3, and the other end links to each other with output filter 5; Output filter 5 one ends link to each other with inverter 4, and a end in the other end of output filter 5 links to each other with power supply 1, the c end links to each other with load 7; By-pass switch 6 one ends link to each other with power supply 1, and the other end links to each other with load 7; Control system 8 links to each other with power supply 1, charging and energy storage device 3, inverter 4, output filter 5, by-pass switch 6, load 7 various pieces, and each part mentioned above is detected, protects and controls.Wherein, first kind of single-phase charging and energy storage device 3 are made up of the 1st controllable silicon V1, the 2nd controllable silicon V2, the 3rd controllable silicon V3, the 4th controllable silicon V4 and capacitor C, can control charge condition.The anode of the 1st controllable silicon V1 of first kind of single-phase charging and energy storage device 3 with link to each other with an output h of single-phase isolating transformer 2 again after the negative electrode of the 2nd controllable silicon V2 links to each other; The anode of the 3rd controllable silicon V3 with link to each other with another output g of single-phase isolating transformer 2 again after the negative electrode of the 4th controllable silicon V4 links to each other; The negative electrode of the 1st controllable silicon V1 with link to each other with the positive pole of capacitor C again after the negative electrode of the 3rd controllable silicon V3 is connected; The anode of the 2nd controllable silicon V2 with link to each other with the negative pole of capacitor C again after the anode of the 4th controllable silicon V4 is connected.Inverter 4 is made of all-controlling power electronics device such as igbt (IGBT) V5, V6, V7, V8, it includes the inverse parallel diode, wherein the positive pole of capacitor C links to each other with the collector electrode of the 1st igbt V5 and the 3rd igbt V7, and the negative pole of capacitor C links to each other with the emitter of the 2nd igbt V6 and the 4th igbt V8; The emitter of the 1st igbt V5 link to each other with the collector electrode of the 2nd igbt V6 the back with output filter 5 inductance L
fAn end link to each other; The emitter of the 3rd igbt V7 link to each other with the collector electrode of the 4th igbt V8 the back with output filter 5 capacitor C
fAn end link to each other.Output filter 5 is by filter inductance L
fWith filter capacitor C
fConstitute, wherein filter inductance L
fAn end link to each other the other end and filter capacitor C with the collector electrode of the 2nd igbt V6
fAn end link to each other with an end of power supply 1 again after linking to each other; Filter capacitor C
fAn end link to each other with an end of power supply 1, the other end links to each other with the collector electrode of the 4th igbt V8 and an end of load 7.By-pass switch 6 can be a mechanical switch, as contactor, also can be electronic power switch fast, and as bidirectional triode thyristor etc., an end links to each other with power supply 1, and the other end links to each other with load 7.Load 7 one ends link to each other with power supply 1, and the other end links to each other with by-pass switch 6.
Node in a among Fig. 1, b, c, d, the e indication circuit.
First kind of single-phase charging and energy storage device 3 have adopted controllable mode, here adopt the 1st controllable silicon V1, the 2nd controllable silicon V2, the 3rd controllable silicon V3 and the 4th controllable silicon V4, can control the charge condition of energy storage capacitor C according to the required bucking voltage of load, improve unit efficiency.When the voltage of power supply 1 is higher than load 7 required rated voltages, close the 1st controllable silicon V1, the 2nd controllable silicon V2, the 3rd controllable silicon V3 and the 4th controllable silicon V4, at this moment, the voltage on the energy storage capacitor C is by inverter 4 controls.When the voltage of power supply 1 is lower than load 7 required rated voltages, by control, energy storage capacitor C is replenished active power to first kind of single-phase charging and energy storage device 3, keep energy storage capacitor C and go up the required direct voltage of inverter 4.In addition, when the voltage of power supply 1 is lower than load 7 required rated voltages, and the power factor of load 7 was less than 1 o'clock, if 1 of the power supply maximum active power that can provide during greater than the various loss of required active power of load 7 and device itself, also can be closed the 1st controllable silicon V1, the 2nd controllable silicon V2, the 3rd controllable silicon V3 and the 4th controllable silicon V4.At this moment by control, suitably improve the power factor of power supply 1 side, can energy storage capacitor C charging be replenished active power to energy storage capacitor C and keep inverter 4 required direct voltages inverter 4.
This topological structure can be according to the voltage deviation between power supply 1 and the rated voltage with load, by control to inverter 4 and first kind of single-phase charging and energy storage device 3, automatically adjust the direct voltage size on the energy storage capacitor C, satisfy purpose the quality of voltage compensation control of load 7.Just according to the size of load 7 required compensation rates, automatically adjust the direct voltage size on the energy storage capacitor C, satisfy the needs of load voltage quality control, can reduce switch stress, interference and the noise of power electronic device in the inverter 4 so greatly, reduce the device loss, improve unit efficiency.
With reference to shown in Figure 2, by the supply voltage V that detects
S, given nominal load voltage V
NWith the input as instantaneous voltage maker 13 of the phase-shifted control signal of phase-shift controller 12 output, its output is load instantaneous reference voltage V
RefLoad instantaneous reference voltage V
RefWith the input of the difference of load voltage VL, its output and inductance L as adjuster 14
fElectric current I
LfDifference as the input of adjuster 15.Supply voltage V
SWith load instantaneous reference voltage V
RefThe feed-forward signal that forms of difference and the output of adjuster 15 constitute the input signal of pulse width modulation (PWM) controller 16 jointly, control inverter 4.Pulse width modulation (PWM) controller 16 comprises control inverter 4.The output result of pulse width modulation (PWM) controller 16 obtains load voltage V through filtering and load circuit 17 again
L
By the supply voltage V that detects
SWith load instantaneous reference voltage V
RefDifference as the input of adjuster 9, the direct voltage V of adjuster 9 outputs and energy storage capacitor C
DDifference as the input of adjuster 10.The output of adjuster 10 divides two-way, one tunnel input as charge circuit controller 11, and another road is as the input of phase-shift controller 12.The output signal of charge circuit controller 11 is controlled the direct voltage V of regulating capacitor C to the 1st controllable silicon V1, the 2nd controllable silicon V2, the 3rd controllable silicon V3, the 4th controllable silicon V4 of first kind of single-phase charging and energy storage device 3
D Charge circuit controller 11 comprises first kind of single-phase charging and energy storage device 3.The output of phase-shift controller 12 can obtain phase-shifted control signal and as an input of instantaneous voltage maker 13.
Control principle:
The amount that the control of the series active AC voltage quality regulator of being invented need detect has: supply voltage V
S(voltage between the ab among Fig. 1), load voltage V
L(voltage between the cb among Fig. 1), capacitor C voltage V
D(voltage between the de among Fig. 1), load current I
L, inductance L
fElectric current I
Lf
System's control principle is as follows:
(1) basic control method is: by detecting supply voltage V
S, load voltage V
L, capacitor C voltage V
D, being compared by the required nominal reference voltage of supply voltage and load obtains required compensated voltage instruction, according to voltage swing and rate of change on the size of compensated voltage instruction, the positive and negative and capacitor C series active AC voltage quality regulator is controlled.The control system structure chart as shown in Figure 2, among the figure, V
NFor given nominal load voltage effective value, as 220V.
(2) by supply voltage V
S, given nominal load voltage V
NIn instantaneous voltage maker 13, form load instantaneous reference voltage V with the phase-shifted control signal of phase-shift controller 12 outputs
Ref, adjuster 14, adjuster 15 and supply voltage V
SWith load instantaneous reference voltage V
RefThe common control signal that constitutes required PWM (pulse width modulation) controller 16 of inverter 4 controls of feed-forward signal that forms of difference, obtain load voltage V through filtering and load circuit 17 again
LLoad voltage V
LWith inductance L
fElectric current I
LfConstitute two closed-loop controls, load voltage V
LBe outer shroud, inductance L
fElectric current I
LfBe interior ring.
(3) supply voltage V
SWith load instantaneous reference voltage V
RefDifference form the DC reference voltage of capacitor C through adjuster 9, this DC reference voltage will be with supply voltage V
SVariation and change, for the performance that guarantees the quality of voltage adjuster device provides suitable dc voltage value.According to the variation of direct current capacitor C, adjuster 10 both can be controlled phase-shift controller 12, also can control the controllable silicon of 11 pairs of first kind of single-phase chargings of charge circuit controller and energy storage device 3 and control.
(4) control system also comprises circuit such as protection, driving, buffer circuit.
Also can adopt Fig. 3 and second kind and the third single-phase controlled charging modes shown in Figure 4 for first kind of single-phase charging shown in Figure 1 and energy storage device 3, VD1, VD2 are diode among the figure.
With reference to shown in Figure 3, the anode of second kind of single-phase charging and 3: the 1 controllable silicon V1 of energy storage device with link to each other with an output h of single-phase isolating transformer 2 again after the negative electrode of the 1st diode VD1 links to each other; The anode of the 2nd controllable silicon V2 with link to each other with another output g of single-phase isolating transformer 2 again after the negative electrode of the 2nd diode VD2 links to each other; The negative electrode of the 1st controllable silicon V1 with link to each other with the positive pole of capacitor C again after the negative electrode of the 2nd controllable silicon V2 is connected; The anode of the 1st diode VD1 with link to each other with the negative pole of capacitor C again after the anode of the 2nd diode VD2 is connected.
With reference to shown in Figure 4, the anode of the third single-phase charging and 3: the 1 controllable silicon V1 of energy storage device with link to each other with an output h of single-phase isolating transformer 2 again after the negative electrode of the 2nd controllable silicon V2 links to each other; The anode of the 1st utmost point pipe VD1 with link to each other with another output g of single-phase isolating transformer 2 again after the negative electrode of the 2nd diode VD2 links to each other; The negative electrode of the 1st controllable silicon V1 with link to each other with the positive pole of capacitor C again after the negative electrode of the 1st utmost point pipe VD1 is connected; The anode of the 2nd controllable silicon V2 with link to each other with the negative pole of capacitor C again after the anode of the 2nd diode VD2 is connected.
In three-phase power supply system, first kind of single-phase charging shown in Figure 1 and energy storage device 3 also can adopt the controlled charging modes of three-phase shown in Figure 5, and V0, V9 also are controllable silicon among the figure.
With reference to shown in Figure 5, the anode of the 10th controllable silicon V0 with link to each other with an Ausgang of three-phase isolation transformer again after the negative electrode of the 9th controllable silicon V9 links to each other; The anode of the 1st controllable silicon V1 with link to each other with an output g of three-phase isolation transformer again after the negative electrode of the 2nd controllable silicon V2 links to each other; The anode of the 3rd controllable silicon V3 with after the negative electrode of the 4th controllable silicon V4 links to each other again another output h of three-phase isolation transformer link to each other; After being connected, the negative electrode of the negative electrode of the 10th controllable silicon V0 and the 1st controllable silicon V1 and the negative electrode of the 3rd controllable silicon V3 link to each other with the positive pole of capacitor C again; After being connected, the anode of the anode of the 9th controllable silicon V9 and the 2nd controllable silicon V2 and the anode of the 4th controllable silicon V4 link to each other with the negative pole of capacitor C again.
With reference to shown in Figure 6, link to each other with three phase mains respectively by three single-phase basic circuit topological structures shown in Figure 1 and just can constitute the three-phase four-wire system that low-voltage distribution system is used, control system also is to adopt three covers control system shown in Figure 2, to the independent respectively control of three-phase system.Wherein, V
SA, V
SB, V
SCIt is respectively three phase mains; T1, T2, T3 are single-phase isolating transformers; V11, V21, V31, V41, V12, V22, V32, V42, V13, V23, V33, V43 are controllable silicons; V51, V61, V71, V81, V52, V62, V72, V82, V53, V63, V73, V83 are igbts; C1, C2, C3 are energy storage capacitors; L
F1, L
F2, L
F3It is filter inductance; C
F1, C
F2, C
F3It is filter capacitor; K1, K2, K3 are by-pass switches; Z
LA, Z
LB, Z
LCIt is respectively threephase load.
With reference to shown in Figure 7, adopted the controlled charging modes of three-phase isolation transformer and three-phase, the same Fig. 6 of other structures.For three-phase power supply system, when first kind of single-phase charging shown in Fig. 1 and energy storage device 3 adopt the controlled charging modes of three-phase shown in Figure 5, constitute three-phase series active AC voltage quality regulator that low-voltage distribution system uses as shown in Figure 7.Control system also adopts three covers control system shown in Figure 2, to the independent respectively control of three-phase system.Wherein, V
SA, V
SB, V
SCIt is respectively three phase mains; T11, T22, T33 are three-phase isolation transformers; V11, V21, V31, V41, V01, V91, V12, V22, V32, V42, V02, V92, V13, V23, V33, V43, V03, V93 are controllable silicons; V51, V61, V71, V81, V52, V62, V72, V82, V53, V63, V73, V83 are igbts; C1, C2, C3 are energy storage capacitors; L
F1, L
F2, L
F3It is filter inductance; C
F1, C
F2, C
F3It is filter capacitor; K1, K2, K3 are by-pass switches; Z
LA, Z
LB, Z
LCIt is respectively threephase load.
Claims (4)
1, a kind of series active AC voltage quality regulator comprises, a single-phase isolating transformer (2) that is connected with power supply (1), and a winding of single-phase isolating transformer (2) links to each other with first kind of single-phase charging and energy storage device (3); First kind of single-phase charging and energy storage device (3) link to each other with an end of inverter (4), and the other end of inverter (4) links to each other with output filter (5); One end of output filter (5) links to each other with inverter (4), and first end points (a) in another end points of output filter (5) links to each other with power supply (1), second end points (c) links to each other with load (7); By-pass switch (6) one ends link to each other with power supply (1), and the other end links to each other with load (7); Control system (8) respectively with power supply (1), first kind of single-phase charging and energy storage device (3), inverter (4), output filter (5), by-pass switch (6), load (7) various piece links to each other, it is characterized in that, described first kind of single-phase charging and energy storage device (3) are by the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4) and capacitor (C) are formed, the anode of the 1st controllable silicon (V1) of first kind of single-phase charging and energy storage device (3) with link to each other with first exit point (h) of single-phase isolating transformer (2) again after the negative electrode of the 2nd controllable silicon (V2) links to each other; The anode of the 3rd controllable silicon (V3) with link to each other with second exit point (g) of single-phase isolating transformer (2) again after the negative electrode of the 4th controllable silicon (V4) links to each other; The negative electrode of the 1st controllable silicon (V1) with link to each other with the positive pole of capacitor (C) again after the negative electrode of the 3rd controllable silicon (V3) is connected; The anode of the 2nd controllable silicon (V2) with link to each other with the negative pole of capacitor (C) again after the anode of the 4th controllable silicon (V4) is connected;
When the voltage of power supply (1) is higher than the required rated voltage of load (7), close the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3) and the 4th controllable silicon (V4), at this moment, the voltage on the capacitor (C) is by the voltage (V of inverter (4) according to phase-shift controller (12) and power supply (1)
S) voltage instruction (V that forms
Ref) turn-on and turn-off of all-controlling power electronics device the 1st igbt (V5), the 2nd igbt (V6), the 3rd igbt (V7), the 4th igbt (V8) are carried out pulse width modulation control;
When power source voltage is lower than the required rated voltage of load (7), the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3) and the 4th controllable silicon (V4) the triggering and conducting angle of first kind of single-phase charging and energy storage device (3) are controlled by charge circuit controller (11):
When the voltage on the capacitor (C) was higher than the setting direct voltage, the triggering and conducting angle of reducing the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4) made that the direct voltage on the capacitor (C) descends;
When the voltage on the capacitor (C) is lower than when setting direct voltage, increase the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), make DC voltage rising on the capacitor (C);
When the size of the supply voltage of electrical network and waveform satisfy load request is that network operation is normal, under the normal situation of network operation, do not need compensation, at this moment by-pass switch (6) closure, single-phase isolating transformer (2), charging and energy storage device (3), inverter (4), output filter (5) quit work;
When the supply voltage of electrical network is higher than the required rated voltage of load or supply voltage is lower than the required rated voltage of load, and the supply voltage harmonic content is that network operation is undesired when surpassing load request, under the abnormal situation of network operation, need compensation, at this moment by-pass switch (6) disconnects, and power supply (1), single-phase isolating transformer (2), first kind of single-phase charging and energy storage device (3), inverter (4), output filter (5) are started working.
2, a kind of series active AC voltage quality regulator according to claim 1, it is characterized in that, described second kind of single-phase charging and energy storage device (3) are to form second kind of single-phase charging and energy storage device (3) with the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 1st diode (VD1), the 2nd diode (VD2) and capacitor (C), the anode of the 1st controllable silicon (V1) in second kind of single-phase charging and the energy storage device (3) with link to each other with first exit point (h) of single-phase isolating transformer (2) again after the negative electrode of the 1st diode (VD1) links to each other; The anode of the 2nd controllable silicon (V2) with link to each other with second exit point (g) of single-phase isolating transformer (2) again after the negative electrode of the 2nd diode (VD2) links to each other; The negative electrode of the 1st controllable silicon (V1) with link to each other with the positive pole of capacitor (C) again after the negative electrode of the 2nd controllable silicon (V2) is connected; The anode of the 1st diode (VD1) with link to each other first kind of single-phase charging in second kind of single-phase charging forming and connect with institute and energy storage device (3) the replacement claim 1 and energy storage device (3) after the anode of the 2nd diode (VD2) is connected again with the negative pole of capacitor (C).
3, a kind of series active AC voltage quality regulator according to claim 1, it is characterized in that, described the third single-phase charging and energy storage device (3) are to form the third single-phase charging and energy storage device (3) with the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 1st diode (VD1), the 2nd diode (VD2) and capacitor (C), the anode of the 1st controllable silicon (V1) in the third single-phase charging and the energy storage device (3) with link to each other with first exit point (h) of single-phase isolating transformer (2) again after the negative electrode of the 2nd controllable silicon (V2) links to each other; The anode of the 1st diode (VD1) with link to each other with second exit point (g) of single-phase isolating transformer (2) again after the negative electrode of the 2nd diode (VD2) links to each other; The negative electrode of the 1st controllable silicon (V1) with link to each other with the positive pole of capacitor (C) again after the negative electrode of the 1st diode (VD1) is connected; The anode of the 2nd controllable silicon (V2) with link to each other with the negative pole of capacitor (C) again after the anode of the 2nd diode (VD2) is connected, single-phase charging of the third that form and connect and energy storage device (3) replace first kind of single-phase charging and the energy storage device (3) in the claim 1.
4, a kind of series active AC voltage quality regulator comprises, a three-phase isolation transformer (2) that is connected with power supply (1), and a winding of three-phase isolation transformer (2) links to each other with three-phase charging and energy storage device (3); Three-phase charging and energy storage device (3) link to each other with an end of inverter (4), and the other end of inverter (4) links to each other with output filter (5); One end of output filter (5) links to each other with inverter (4), and first end points (a) in another end points of output filter (5) links to each other with power supply (1), second end points (c) links to each other with load (7); By-pass switch (6) one ends link to each other with power supply (1), and the other end links to each other with load (7); Control system (8) respectively with power supply (1), three-phase charging and energy storage device (3), inverter (4), output filter (5), by-pass switch (6), load (7) various piece links to each other, it is characterized in that, described three-phase charging and energy storage device (3) are by the 10th controllable silicon (V0), the 9th controllable silicon (V9), the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4) and capacitor (C) are formed, the anode of the 10th controllable silicon (V0) in three-phase charging and the energy storage device (3) with link to each other with first exit point (f) of three-phase isolation transformer (2) again after the negative electrode of the 9th controllable silicon (V9) links to each other; The anode of the 1st controllable silicon (V1) with link to each other with second exit point (g) of three-phase isolation transformer (2) again after the negative electrode of the 2nd controllable silicon (V2) links to each other; The anode of the 3rd controllable silicon (V3) with link to each other with the 3rd exit point (h) of three-phase isolation transformer (2) again after the negative electrode of the 4th controllable silicon (V4) links to each other; After being connected, the negative electrode of the negative electrode of the 10th controllable silicon (V0) and the 1st controllable silicon (V1) and the negative electrode of the 3rd controllable silicon (V3) link to each other with the positive pole of capacitor (C) again; After being connected, the anode of the anode of the 9th controllable silicon (V9) and the 2nd controllable silicon (V2) and the anode of the 4th controllable silicon (V4) link to each other with the negative pole of capacitor (C) again;
When the voltage of power supply (1) is higher than the required rated voltage of load (7), close the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), the 10th controllable silicon (V0), the 9th controllable silicon (V9), at this moment, the voltage on the capacitor (C) is by the voltage (V of inverter (4) according to phase-shift controller (12) and power supply (1)
S) voltage instruction (V that forms
Ref) turn-on and turn-off of all-controlling power electronics device the 1st igbt (V5), the 2nd igbt (V6), the 3rd igbt (V7), the 4th igbt (V8) are carried out pulse width modulation control;
When power source voltage was lower than the required rated voltage of load (7), the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3) and the 4th controllable silicon (V4) by charging of the 11 pairs of three-phases of charge circuit controller and energy storage device 3, the 10th controllable silicon (V0), the 9th controllable silicon (V9) was controlled:
When the voltage on the capacitor (C) is higher than the setting direct voltage, reduce the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), the 10th controllable silicon (V0), the 9th controllable silicon (V9), make that the direct voltage on the capacitor (C) descends;
When the voltage on the capacitor (C) is lower than the setting direct voltage, increase the triggering and conducting angle of the 1st controllable silicon (V1), the 2nd controllable silicon (V2), the 3rd controllable silicon (V3), the 4th controllable silicon (V4), the 10th controllable silicon (V0), the 9th controllable silicon (V9), make DC voltage rising on the capacitor (C);
When the size of the supply voltage of electrical network and waveform satisfy load request is that network operation is normal, under the normal situation of network operation, do not need compensation, at this moment by-pass switch (6) closure, three-phase isolation transformer (2), three-phase charging and energy storage device (3), inverter (4), output filter (5) quit work; When electric network source voltage is higher than the required rated voltage of load or supply voltage is lower than the required rated voltage of load, and the supply voltage harmonic content is that network operation is undesired when surpassing load request, under the abnormal situation of network operation, need compensation, at this moment by-pass switch (6) disconnects, and power supply (1), three-phase isolation transformer (2), three-phase charging and energy storage device (3), inverter (4), output filter (5) are started working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100429169A CN100442626C (en) | 2006-06-01 | 2006-06-01 | Series active AC voltage quality regulator and controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100429169A CN100442626C (en) | 2006-06-01 | 2006-06-01 | Series active AC voltage quality regulator and controlling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1862906A CN1862906A (en) | 2006-11-15 |
| CN100442626C true CN100442626C (en) | 2008-12-10 |
Family
ID=37390260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100429169A Expired - Fee Related CN100442626C (en) | 2006-06-01 | 2006-06-01 | Series active AC voltage quality regulator and controlling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100442626C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101345419B (en) * | 2008-05-14 | 2011-06-01 | 西安交通大学 | Series voltage quality regulator and fast investment and cutting method |
| CN101572415B (en) * | 2009-03-13 | 2011-01-05 | 西安交通大学 | Method for controlling series voltage quality compensator |
| CN102130578A (en) * | 2011-01-11 | 2011-07-20 | 张太平 | Direct-current power supply containing storage battery feedback discharging loop |
| CN102208874B (en) * | 2011-04-22 | 2013-03-20 | 浙江大学 | Isolated voltage compensation circuit |
| CN102638174A (en) * | 2012-04-10 | 2012-08-15 | 四川大学 | Isolated constant amplitude vector alternating current voltage regulator of power frequency transformer |
| CN103326363A (en) * | 2013-03-15 | 2013-09-25 | 上海储新电力科技有限公司 | Current conversion device with function of multi-target load control |
| CN107872060A (en) * | 2016-09-27 | 2018-04-03 | 新能动力（北京）电气科技有限公司 | A kind of AC stabilizer |
| CN108075671A (en) * | 2016-11-10 | 2018-05-25 | 中电普瑞科技有限公司 | A kind of flickering isolating device |
| CN107611992A (en) * | 2017-11-10 | 2018-01-19 | 贵州电网有限责任公司电力科学研究院 | A kind of three phase separation formula hybrid power electronic transformer and its control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0790689A2 (en) * | 1996-02-14 | 1997-08-20 | RWE Energie Aktiengesellschaft | Method for the improvement of the voltage quality in an AC network and apparatus for implementing this method |
| US20040155633A1 (en) * | 2002-11-08 | 2004-08-12 | Uis Abler Electronics Co., Ltd. | Hybrid reactive power compensation device |
| US6940187B2 (en) * | 2000-12-14 | 2005-09-06 | Northeastern University | Robust controller for controlling a UPS in unbalanced operation |
| CN1665095A (en) * | 2005-03-24 | 2005-09-07 | 华中科技大学 | A comprehensive electric energy quality regulator |
| US20060044850A1 (en) * | 2004-08-30 | 2006-03-02 | Uis Abler Electronics Co., Ltd. | Active type harmonic suppression apparatus |
-
2006
- 2006-06-01 CN CNB2006100429169A patent/CN100442626C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0790689A2 (en) * | 1996-02-14 | 1997-08-20 | RWE Energie Aktiengesellschaft | Method for the improvement of the voltage quality in an AC network and apparatus for implementing this method |
| US6940187B2 (en) * | 2000-12-14 | 2005-09-06 | Northeastern University | Robust controller for controlling a UPS in unbalanced operation |
| US20040155633A1 (en) * | 2002-11-08 | 2004-08-12 | Uis Abler Electronics Co., Ltd. | Hybrid reactive power compensation device |
| US20060044850A1 (en) * | 2004-08-30 | 2006-03-02 | Uis Abler Electronics Co., Ltd. | Active type harmonic suppression apparatus |
| CN1665095A (en) * | 2005-03-24 | 2005-09-07 | 华中科技大学 | A comprehensive electric energy quality regulator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1862906A (en) | 2006-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100442626C (en) | Series active AC voltage quality regulator and controlling method | |
| CN201035433Y (en) | Energy bidirectional flowing voltage regulator | |
| CN101621254B (en) | Power electronic transformer applied to distribution network | |
| CN102769389B (en) | Transformer-free series voltage quality regulator based on parasitic booster circuit and control method of regulator | |
| CN205248805U (en) | Novel DVR voltage compensation device | |
| CN102097793B (en) | Multi-current converter unified power quality conditioning device for power distribution system | |
| CN103986136A (en) | Novel multifunctional fault current limiting system based on optical storage technology and control method thereof | |
| CN201584899U (en) | Topological structure of power electronic transformer | |
| CN104578082B (en) | The partition method of dynamic voltage correction device, bearing calibration and load short circuits failure | |
| CN101409450B (en) | Static state synchronization reactive compensator connected through capacitance impedance and control method (thereof) | |
| CN202488205U (en) | Novel serial-parallel conversion-type UPS | |
| CN203734529U (en) | Novel bidirectional bipolar direct-current converter | |
| CN104253549A (en) | LCL filtering-based circuit topology structure of high-power PWM (pulse-width modulation) rectifier | |
| CN110137977B (en) | Converter station series connection adjusting system and control method | |
| CN107910877A (en) | Shunt capacitor switching control method during a kind of sending end current conversion station high power fluctuation | |
| CN100442647C (en) | Transformer-free tandem active alternating voltage quality adjuster and its control method | |
| CN103840474A (en) | Main circuit topology structure of medium-high voltage directly suspended type static synchronous reactive compensator | |
| CN101252283B (en) | Medium voltage system inductive dynamic reactive-load adjusting device | |
| CN107681649B (en) | Method for controlling voltage stability of direct-current micro-grid bus | |
| CN102522813A (en) | Photovoltaic power generation voltage stabilizer | |
| CN204190641U (en) | Based on the high-power PWM rectifier circuit topological structure of LCL filtering | |
| CN113300369A (en) | Loop line operation method based on power electronic transformer power distribution network | |
| CN105048480A (en) | Dynamic reactive power compensation device | |
| CN201667543U (en) | High-voltage dynamic reactive compensation device based on adjustable magnetic control reactor | |
| CN103441678B (en) | Variable PI variable frequency control method of large-capacity isolation type direct current converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Huizhou live electric equipment Co., Ltd. Assignor: Xi'an Jiaotong University Contract record no.: 2010440000494 Denomination of invention: Series active AC voltage quality regulator and controlling method Granted publication date: 20081210 License type: Exclusive License Open date: 20061115 Record date: 20100517 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081210 Termination date: 20140601 |