CN103997043B - A kind of Research on Unified Power Quality Conditioner and its adjusting method based on T-shaped three level - Google Patents
A kind of Research on Unified Power Quality Conditioner and its adjusting method based on T-shaped three level Download PDFInfo
- Publication number
- CN103997043B CN103997043B CN201410206973.0A CN201410206973A CN103997043B CN 103997043 B CN103997043 B CN 103997043B CN 201410206973 A CN201410206973 A CN 201410206973A CN 103997043 B CN103997043 B CN 103997043B
- Authority
- CN
- China
- Prior art keywords
- voltage
- current
- switching tube
- phase
- filter
- 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.)
- Active
Links
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
- Y02E40/40—Arrangements for reducing harmonics
Landscapes
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of Research on Unified Power Quality Conditioner based on T-shaped three level, the present invention be directed to micro-capacitance sensor power quality problem, a kind of Research on Unified Power Quality Conditioner and control method based on T-shaped tri-level inversion technology are proposed.Source, lotus detection means are used for the power supply and load real-time condition for detecting micro-capacitance sensor；Series type inverter is used to be serially connected between power supply and load；Code converter in parallel is used to be connected in parallel on load side；DC side energy-storage units are used for the storage of energy；Hall sensor is used for Transformed Measurement device output current information of voltage；Analog signal is concentrated and is converted into digital quantity by analog acquisition unit by external AD；Main digitial controller is used to complete the functions such as running status judgement, data analysis；Drive circuit is used for the realization of output and the faulty hardware protection of pwm signal.For T-shaped three level UPQC control strategy, it is proposed that the quasi- ratio resonance current control strategy of modified and the neutral-point voltage balance strategy of pwm pulse optimization switching.
Description
Technical field
Research on Unified Power Quality Conditioner, i.e. UPQC, it be it is a kind of possess effectively solve the comprehensive of most of power quality problems
Close compensation device.The present invention relates to a kind of micro-capacitance sensor Research on Unified Power Quality Conditioner based on T-shaped three Level Technology and controlling party
Method, belongs to intelligent grid field.
Background technology
Micro-capacitance sensor is a kind of system collectively constituted by micro battery and load, and its power quality problem is analyzed as follows：Micro-
In power network, in addition to load variations influence, micro battery output-power fluctuation can also draw voltage flicker；In addition, nonlinear-load will
A large amount of harmonic waves are produced, trigger the imbalance of power network three-phase voltage；Meanwhile, micro battery and various converters can also be produced
Certain harmonic wave, influences the normal operation of micro-capacitance sensor.
For the above-mentioned comprehensive electric energy quality problem of micro-capacitance sensor, using passive LC filter, though harmonic wave can be reduced, improves and hands over
The power factor of current load, but application confined condition is more.In addition, using single serial/parallel type Active Power Filter-APF or
Single dynamic electric voltage recovery device, is difficult to the power quality controlling under various working.
UPQC is a kind of dress that can effectively solve the problem that the main power quality problem such as micro-capacitance sensor voltage flickering, current harmonics
Put：(Fig. 1's) series type inverter part produces a voltage compensation in real time by the Voltage Drop amount of on-line checking load side
Measure to offset the influence of magnitude so that the power supply of load side meets standard all the time, efficiently solves the problems, such as voltage flicker；(Fig. 1
) code converter part in parallel is by the current distortion component of on-line checking micro battery side, and it is equal to produce an amplitude in real time
The current compensation amount of opposite in phase, to realize the correction distorted to power network current.Main circuit topological structure is UPQC core group
Into one of part, what is be most widely used in existing many level-type main circuit topologies is diode clamp bit-type tri-level circuit, it
Mid-point voltage clamper is realized by introducing diode, but voltage balance control becomes complicated.Engineering circles are badly in need of a kind of new
UPQC characteristics and performance is substantially improved in the efficient circuit topology of type, in addition, UPQC performance quality is also resided in for harmonic wave electricity
The real-time detection of stream is with separating, and related complicated algorithm requires higher to system real time, thus to high-speed figure control system
Design proposes new demand.
The content of the invention
In order to solve existing above mentioned problem, the present invention provides a kind of Research on Unified Power Quality Conditioner based on T-shaped three level, can
With the main grid voltage sags of effective compensation, fluctuation, overvoltage, voltage distortion, and in micro-capacitance sensor non-linear and imbalance is born
The synthesis power quality issues that lotus brings, present invention is mainly applied in micro-capacitance sensor, micro-capacitance sensor mainly includes power supply and load.
The technical problems to be solved by the invention are achieved through the following technical solutions：
A kind of Research on Unified Power Quality Conditioner based on T-shaped three level, including for detect power supply power detector,
Load detection device, series type inverter, code converter in parallel, energy-storage units, Hall sensor, analog acquisition unit, master
Digitial controller and drive circuit, the series type inverter are connected by auto-transformer with the mains side in micro-capacitance sensor,
The code converter in parallel is connected in parallel on the load side in micro-capacitance sensor, the energy-storage units simultaneously with series type inverter and parallel connection type
Converter is connected, and the power detector is connected with micro battery, series type inverter and main digitial controller simultaneously, load
Detection means is connected with load and analog acquisition unit simultaneously, and series type inverter is also connected simultaneously with code converter in parallel
Drive circuit and Hall sensor, analog acquisition unit are connected with main digitial controller and Hall sensor simultaneously, main number
Word controller is also connected with drive circuit.
Preferably, the series type inverter includes the first DC bus capacitor partial pressure branch road, the first three phase full bridge inversion electricity
Road, the first two-way switch pipe, the second two-way switch pipe and the 3rd two-way switch pipe, the first, second and third two-way switch pipe
One end is connected to the midpoint o of the first DC bus capacitor partial pressure branch road1, the other end connects first three-phase full-bridge inverting circuit respectively
Three-phase bridge arm midpoint, three bridge arm midpoints of first three-phase full-bridge inverting circuit constitute the output of series type inverter
End；The output end of series type inverter is entered the mains side in micro-capacitance sensor, institute by auto-transformer series connection by LC filter circuits
Stating code converter in parallel includes:Second DC bus capacitor partial pressure branch road, the second three-phase full-bridge inverting circuit, the 4th two-way switch
Pipe, the 5th two-way switch pipe, the 6th two-way switch pipe, one end of described fourth, fifth, six two-way switch pipes are connected to the second electric capacity
The midpoint o of partial pressure branch road2, the other end connects the midpoint of the three-phase bridge arm of second three-phase full-bridge inverting circuit, described respectively
Three bridge arm midpoints of two three-phase full-bridge inverting circuits constitute the output end of code converter in parallel, and the output end passes through LC filtered electricals
Load side in road, parallel connection access micro-capacitance sensor.
Preferably, the first DC side partial pressure branch road includes electric capacity C1, electric capacity C2, the first three-phase full-bridge inverting circuit bag
Include switching tube Sa13, switching tube Sb13, switching tube Sc13, switching tube Sa14, switching tube Sb14, switching tube Sc14, the first two-way switch pipe
Including switching tube Sa11, switching tube Sa12, the second two-way switch pipe include switching tube Sb11, switching tube Sb12, the 3rd two-way switch pipe
Including switching tube Sc11, switching tube Sc12；The second DC bus capacitor partial pressure branch road includes electric capacity C3, electric capacity C4, the second three-phase is complete
Bridge inverter circuit includes switching tube Sa23, switching tube Sb23, switching tube Sc23, switching tube Sa24, switching tube Sb24, switching tube Sc24, the
Four two-way switch pipes include switching tube Sa21, switching tube Sa22, the 5th two-way switch pipe include switching tube Sb21, switching tube Sb22, the
Six two-way switch pipes include switching tube Sc21、Sc22。
Preferably, the main digitial controller also includes being used to improve series and parallel code converter output waveform quality and steady
Qualitatively quasi- ratio resonant controller.
A kind of quality of power supply adjusting method of the Research on Unified Power Quality Conditioner based on T-shaped three level, it is characterised in that：Institute
Stating quality of power supply adjusting method includes harmonic current adjusting method and voltage flicker compensation method, wherein：
The harmonic current adjusting method includes：Main digitial controller detects the magnitude of current at U1, V1, W1 in real time, by three
The digital quantity of phase current is gone under d, q synchronous coordinate system by 3/2 coordinate transform.Wherein, fundametal compoment is characterized as directly under d axles
Signal is flowed, harmonic component is characterized as AC signal.AC signal is filtered out using wave digital lowpass filter, sign fundametal compoment is left
DC quantity, and by the direct current signal after 3/2 coordinate inverse transformation with U1, V1, W1 detect original of ac make it is poor, obtain
The distortion current reference instruction of device compensation, quasi- ratio resonant controller is by its Current Control Strategy real-time tracking and controls
Current compensation effect；At the same time, detection electric capacity C3, C4 DC voltage difference in real time, and pressure difference regulation above and below carrying out, then by result
It is superimposed in compensation component and carries out integrated treatment, and produces pwm pulse signal.The pulse signal is in parallel according to optimization order driving
The A of code converter2Phase switching tube Sa21、Sa22、Sa23、Sa24, B2Phase switching tube Sb21、Sb22、Sb23、Sb24, D2Phase switching tube Sc21、
Sc22、Sc23、Sc24, so that by electric capacity C3、C4Direct current be converted into AC signal with harmonic component opposite in phase equal in magnitude
Outlet side, then pass through net side filter inductance La2、Lb2、Lc2And electric capacity Cu2、Cv2、Cw2Electricity is injected after the filter circuit processing of composition
Net, it is final to ensure that power network current waveform meets good sine degree demand, wherein switching tube Sa21With Sa23、Sa22With Sa24、Sb21With
Sb23、Sb22With Sb24、Sc21With Sc23、Sc22With Sc24The situation that turns on and off be complementary relationship.
The voltage flicker compensation method includes：Main digitial controller detects the voltage magnitude and phase at U2, V2, W2 in real time
Position information, by positive negative coordinate transform and filtering process computing, extracts allocation of distortion during voltage flicker, and then draw phase
Compensation rate, then the space vector PWM driving pulse through pwm pulse optimization module one graded of generation are answered, the pwm pulse signal leads to
Overdrive circuit unit controlled after power amplification the A of series type inverter1Phase switching tube Sa11、Sa12、Sa13、Sa14, B1Xiang Kai
Close pipe Sb11、Sb12、Sb13、Sb14, D1Phase switching tube Sc11、Sc12、Sc13、Sc14Turn on and off, so as to will be stored in electric capacity C1、
C2DC power conversion into the three-phase alternating current component of Voltage Drop can be offset.The output component passes through net side filter inductance La1、
Lb1、Lc1And electric capacity Cv1、Cu1、Cw1After the filter circuit shaping of composition, by coupling transformer Tu1、Tv1、Tw1Line attachment, with reality
When compensation load side U2, V2, W2 Voltage Drop value.Wherein, Sa11With Sa13, Sa12With Sa14, Sb11With Sb13, Sb12With Sb14, Sc11
With Sc13, Sc12With Sc14The situation that turns on and off be complementary relationship.
Further, the Current Control Strategy of the quasi- ratio resonant controller comprises the following steps：
A, DC voltage UdAfter T-shaped tri-level inversion, by LC filter after obtain voltage Vo；
B, from VoTo ViTransmission function be：Wherein L is filtering inductance, and C is filter capacitance, and R is load resistance, ωnFor intrinsic frequency, δ is error rate, Vo
For input voltage；ViFor output voltage；S is time t Laplace transformation；
C, the current control based on quasi- ratio resonant controller, its transmission function is, wherein, Kp、KiRespectively proportionality coefficient
And integral coefficient, ω0For resonant frequency, ωcFor cut-off frequency, s is time t Laplace transformation；
D, the control strategy based on filter capacitor current feedback, the open-loop transfer function based on capacitor current feedback is：Wherein L is filtering inductance, and C is filter capacitance；R is negative
Carry resistance, KvFor voltage feedback factor, KiFor current feedback coefficient, KsvpwmFor proportionality coefficient.
The beneficial effect that is reached of the present invention is：
1. using T-shaped three Level Technology, major loop switching tube bears the half of DC voltage, as Ud/ 2, power device
Part voltage stress is small；Meanwhile, the increase of level number so that waveform is closer to sine, and harmonic content is low.
2. the series type inverter of Research on Unified Power Quality Conditioner and code converter in parallel use the T-shaped three level conduct of three-phase
Main circuit, its conduction loss is lower, and for diode clamp three-level topology, number of devices is further reduced.
3. based on the current control of quasi- ratio resonant controller, it is effectively improved converter output waveform quality and stability.
Brief description of the drawings
Fig. 1 is the general structure and annexation schematic diagram of the present invention；
Fig. 2 is the circuit diagram of code converter in parallel of the invention and series type inverter；
Fig. 3 is unidirectional T-shaped tri-level circuit schematic diagram；
Fig. 4 is the transmission function block diagram of the quasi- ratio resonant controller of modified.
Embodiment
In order to further describe the technical characterstic and effect of the present invention, below in conjunction with the drawings and specific embodiments to this hair
It is bright to be described further.
As indicated with 1, a kind of micro-capacitance sensor Research on Unified Power Quality Conditioner based on T-shaped three Level Technology, including for detecting
The power detector 1a of power supply, load detection device 1b, series type inverter 2, code converter 3 in parallel, energy-storage units 4, suddenly
That sensor 5, analog acquisition unit 6, main digitial controller 7 and drive circuit 8, the three-phase of series type inverter 2 are lived
Circuit is concatenated into power network after LC filter circuits by auto-transformer, and the code converter 3 in parallel passes through LC filter circuits
Parallel connection access power network, the energy-storage units 4 are connected with series type inverter 2 and code converter 3 in parallel simultaneously, the power detecting
Device 1a is connected with micro battery, series type inverter 2 and main digitial controller 7 simultaneously, and load detection device 1b is simultaneously with bearing
Lotus and analog acquisition unit 6 are connected, and series type inverter 2 also be connected drive circuit 8 and suddenly with code converter 3 in parallel simultaneously
That sensor 5, analog acquisition unit 6 is connected with main digitial controller 7 and Hall sensor 5 simultaneously, main digitial controller 7
Also it is connected with drive circuit 8；The power detector 1a and load detection device 1b is used for the power supply for detecting micro-capacitance sensor and negative
The real-time condition of lotus, series type inverter 2 provides highly reliable power supply for sensitive loads, the problem of effectively solving voltage dip,
Code converter 3 in parallel is used to solve the problems, such as Harmonic Current Distortion caused by load, and the series and parallel code converter uses three-phase
T-shaped three Level Technology, energy-storage units 4 are used for the energy stores of series and parallel code converter, and Hall sensor 5, which is used to measure, to be converted
The voltage collected and current analog signal are passed through AD conversion by device output current information of voltage, the analog acquisition unit 6
Device is converted into after digital quantity being transmitted to digitial controller 7 again, and main digitial controller 7 after data memory calculation process to passing through PWM
Pulse optimization algorithm produces pwm signal, and amplifies driving series and parallel code converter, the main numeral later through overdrive circuit 8
Controller is used for the judgement of finishing device running status, data analysis, incident management, compensation policy realization, software protection etc., main number
Word controller is additionally provided with the quasi- ratio resonant controller of modified, and it mainly improves the change of series and parallel type by Current Control Strategy
Parallel operation output voltage wave quality and stability.
(wherein Fig. 2 is the code converter in parallel and series type inverter using T-shaped three Level Technology referring to Figures 1 and 2
Circuit diagram)
The series type inverter 2 includes the first DC bus capacitor partial pressure branch road, the first three-phase full-bridge inverting circuit, first
Two-way switch pipe, the second two-way switch pipe and the 3rd two-way switch pipe, one end of the first, second and third two-way switch pipe are equal
It is connected to the midpoint o of the first DC bus capacitor partial pressure branch road1, the other end connects the three-phase of first three-phase full-bridge inverting circuit respectively
The midpoint of bridge arm, three bridge arm midpoints of first three-phase full-bridge inverting circuit constitute the output end of series type inverter 2；String
Join the output end of code converter 2 by LC filter circuits, enter the mains side in micro-capacitance sensor by auto-transformer series connection, it is described simultaneously
Connection code converter 3 includes:Second DC bus capacitor partial pressure branch road, the second three-phase full-bridge inverting circuit, the 4th two-way switch pipe,
Five two-way switch pipes, the 6th two-way switch pipe, one end of described fourth, fifth, six two-way switch pipes are connected to the second capacitance partial pressure
The midpoint o of branch road2, the other end connects the midpoint of the three-phase bridge arm of second three-phase full-bridge inverting circuit, the described 2nd 3 respectively
Three bridge arm midpoints of phase full bridge inverter constitute the output end of code converter 3 in parallel, the output end by LC filter circuits,
Load side in parallel connection access micro-capacitance sensor, the first DC side partial pressure branch road includes electric capacity C1, electric capacity C2, the first three phase full bridge
Inverter circuit includes switching tube Sa13, switching tube Sb13, switching tube Sc13, switching tube Sa14, switching tube Sb14, switching tube Sc14, first
Two-way switch pipe includes switching tube Sa11, switching tube Sa12, the second two-way switch pipe include switching tube Sb11, switching tube Sb12, the 3rd
Two-way switch pipe includes switching tube Sc11, switching tube Sc12；The second DC bus capacitor partial pressure branch road includes electric capacity C3, electric capacity C4,
Second three-phase full-bridge inverting circuit includes switching tube Sa23, switching tube Sb23, switching tube Sc23, switching tube Sa24, switching tube Sb24, open
Close pipe Sc24, the 4th two-way switch pipe include switching tube Sa21, switching tube Sa22, the 5th two-way switch pipe include switching tube Sb21, open
Close pipe Sb22, the 6th two-way switch pipe include switching tube Sc21、Sc22。
The quality of power supply adjusting method includes harmonic current adjusting method and voltage flicker adjusting method, wherein：
Harmonic current adjusting method includes：Main digitial controller detects the magnitude of current at U1, V1, W1 in real time, by three-phase electricity
The digital quantity of stream is gone under d, q synchronous coordinate system by 3/2 coordinate transform.Wherein, fundametal compoment is characterized as direct current letter under d axles
Number, harmonic component is characterized as AC signal.AC signal is filtered out using wave digital lowpass filter, leaves and characterizes the straight of fundametal compoment
Flow, and the direct current signal is made poor after 3/2 coordinate inverse transformation with the original of ac of detection at U1, V1, W1, obtain device
The distortion current reference instruction of compensation, quasi- ratio resonant controller passes through its Current Control Strategy real-time tracking and control electric current
Compensation effect；At the same time, pressure difference regulation above and below detection electric capacity C3, C4 DC voltage difference, and progress in real time, then result is superimposed
Integrated treatment is carried out into compensation component, and produces pwm pulse signal.The pulse signal becomes according to optimization order driving parallel connection type
The A of parallel operation (3)2Phase switching tube Sa21、Sa22、Sa23、Sa24, B2Phase switching tube Sb21、Sb22、Sb23、Sb24, D2Phase switching tube Sc21、
Sc22、Sc23、Sc24, so that by electric capacity C3、C4Direct current be converted into AC signal with harmonic component opposite in phase equal in magnitude
Outlet side, then pass through net side filter inductance La2、Lb2、Lc2And electric capacity Cu2、Cv2、Cw2Electricity is injected after the filter circuit processing of composition
Net, it is final to ensure that power network current waveform meets good sine degree demand, wherein switching tube Sa21With Sa23、Sa22With Sa24、Sb21With
Sb23、Sb22With Sb24、Sc21With Sc23、Sc22With Sc24The situation that turns on and off be complementary relationship；
Voltage flicker compensation method includes：Main digitial controller detects that voltage magnitude and phase at U2, V2, W2 are believed in real time
Breath, by positive negative coordinate transform and filtering process computing, extracts allocation of distortion during voltage flicker, and then draw corresponding benefit
The amount of repaying, then the space vector PWM driving pulse through pwm pulse optimization module one graded of generation, the pwm pulse signal, which passes through, to be driven
Dynamic circuit unit carries out the A of control series type inverter (2) after power amplification1Phase switching tube Sa11、Sa12、Sa13、Sa14, B1Xiang Kai
Close pipe Sb11、Sb12、Sb13、Sb14, D1Phase switching tube Sc11、Sc12、Sc13、Sc14Turn on and off, so as to will be stored in electric capacity C1、
C2DC power conversion into the three-phase alternating current component of Voltage Drop can be offset.The output component passes through net side filter inductance La1、
Lb1、Lc1And electric capacity Cv1、Cu1、Cw1After the filter circuit shaping of composition, by coupling transformer Tu1、Tv1、Tw1Line attachment, with reality
When compensation load side U2, V2, W2 Voltage Drop value.Wherein, Sa11With Sa13, Sa12With Sa14, Sb11With Sb13, Sb12With Sb14, Sc11
With Sc13, Sc12With Sc14The situation that turns on and off be complementary relationship.
In order to meet the interference free performance of system and require output voltage waveforms are high-quality, the present invention proposes base
In the Current Control Strategy of quasi- ratio resonant controller.Its step is as follows：
Step one, single-phase T-shaped three-level topology is as shown in figure 3, DC voltage UdAfter T-shaped tri-level inversion, filtered by LC
Voltage V is obtained after rippleo。
Step 2, from VoTo ViTransmission function be：
Wherein,L is filtering inductance；C is filter capacitance；R is load resistance；ωn
For intrinsic frequency；δ is error rate；VoFor input voltage；ViFor output voltage；S is time t Laplace transformation.
Step 3, based on the current control of quasi- ratio resonant controller, its control block diagram is as shown in Figure 4.
The transmission function of the ratio that is defined resonant controller, wherein, Kp、KiRespectively
Proportionality coefficient and integral coefficient, ω0For resonant frequency, ωcFor cut-off frequency.
Step 4, based on the control strategy of filter capacitor current feedback, can advance correction inverter output voltage, make system
Load characteristic be hardened.
Open-loop transfer function based on capacitor current feedback system is：
Wherein, L is filtering inductance；C is filter capacitance；R is load resistance；KvFor voltage feedback factor；KiFor electric current
Feedback factor；KsvpwmFor proportionality coefficient.
Above-described embodiment does not limit the present invention in any form, and all forms for taking equivalent substitution or equivalent transformation are obtained
Technical scheme, be within the scope of the present invention.
Claims (2)
1. a kind of quality of power supply adjusting method of the Research on Unified Power Quality Conditioner based on T-shaped three level, it is characterised in that：It is described
Quality of power supply adjusting method includes harmonic current adjusting method and voltage flicker compensation method, wherein：
The harmonic current adjusting method includes：Main digitial controller detects the magnitude of current at U1, V1, W1 in real time, by three-phase electricity
The digital quantity of stream is gone under d, q synchronous coordinate system by 3/2 coordinate transform, wherein, fundametal compoment is characterized as direct current letter under d axles
Number, harmonic component is characterized as AC signal, and AC signal is filtered out using wave digital lowpass filter, leaves and characterizes the straight of fundametal compoment
Flow, and the direct current signal is made poor after 3/2 coordinate inverse transformation with the original of ac of detection at U1, V1, W1, obtain device
The distortion current reference instruction of compensation, quasi- ratio resonant controller passes through its Current Control Strategy real-time tracking and control electric current
Compensation effect；At the same time, pressure difference regulation above and below detection electric capacity C3, C4 DC voltage difference, and progress in real time, then result will be adjusted
It is superimposed in compensation component and carries out integrated treatment, and produce pwm pulse signal, the pulse signal is in parallel according to optimization order driving
The A of code converter (3)2Phase switching tube Sa21、Sa22、Sa23、Sa24, B2Phase switching tube Sb21、Sb22、Sb23、Sb24, D2Phase switching tube
Sc21、Sc22、Sc23、Sc24, so that by electric capacity C3、C4Direct current be converted into exchanging with harmonic component opposite in phase equal in magnitude
Signal output side, then pass through net side filter inductance La2、Lb2、Lc2And electric capacity Cu2、Cv2、Cw2Injected after the filter circuit processing of composition
Power network, wherein switching tube Sa21With Sa23、Sa22With Sa24、Sb21With Sb23、Sb22With Sb24、Sc21With Sc23、Sc22With Sc24Open and
Shut-off situation is complementary relationship；
The voltage flicker compensation method includes：Main digitial controller detects that voltage magnitude and phase at U2, V2, W2 are believed in real time
Breath, by positive negative coordinate transform and filtering process computing, extracts allocation of distortion during voltage flicker, and then draw corresponding benefit
The amount of repaying, then the space vector PWM driving pulse through pwm pulse optimization module one graded of generation, the pwm pulse signal, which passes through, to be driven
Dynamic circuit unit carries out the A of control series type inverter (2) after power amplification1Phase switching tube Sa11、Sa12、Sa13、Sa14, B1Xiang Kai
Close pipe Sb11、Sb12、Sb13、Sb14, D1Phase switching tube Sc11、Sc12、Sc13、Sc14Turn on and off, so as to will be stored in electric capacity C1、
C2DC power conversion into the three-phase alternating current component of Voltage Drop can be offset, the three-phase alternating current component passes through net side filter inductance
La1、Lb1、Lc1And electric capacity Cv1、Cu1、Cw1After the filter circuit shaping of composition, by coupling transformer Tu1、Tv1、Tw1Line attachment, with
Real-Time Compensation load side U2, V2, W2 Voltage Drop value, wherein, Sa11With Sa13, Sa12With Sa14, Sb11With Sb13, Sb12With Sb14,
Sc11With Sc13, Sc12With Sc14The situation that turns on and off be complementary relationship.
2. a kind of quality of power supply regulation of Research on Unified Power Quality Conditioner based on T-shaped three level according to claim 1
Method, it is characterised in that：The Current Control Strategy of the quasi- ratio resonant controller comprises the following steps：
A, DC voltage UdAfter T-shaped tri-level inversion, by LC filter after obtain voltage Vo；
B, from VoTo ViTransmission function be：Wherein L
For filtering inductance, C is filter capacitance, and R is load resistance, ωnFor intrinsic frequency, δ is error rate, VoFor input voltage；Vi
For output voltage；S is time t Laplace transformation；
C, the current control based on quasi- ratio resonant controller, its transmission function isIts
In, Kp、KiRespectively proportionality coefficient and integral coefficient, ω0For resonant frequency, ωcFor cut-off frequency, the Laplace that s is time t becomes
Change；
D, the control strategy based on filter capacitor current feedback, the open-loop transfer function based on capacitor current feedback is：Wherein L is filtering inductance, and C is filter capacitance；R is negative
Carry resistance, KvFor voltage feedback factor, KiFor current feedback coefficient, KsvpwmFor proportionality coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410206973.0A CN103997043B (en) | 2014-05-15 | 2014-05-15 | A kind of Research on Unified Power Quality Conditioner and its adjusting method based on T-shaped three level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410206973.0A CN103997043B (en) | 2014-05-15 | 2014-05-15 | A kind of Research on Unified Power Quality Conditioner and its adjusting method based on T-shaped three level |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103997043A CN103997043A (en) | 2014-08-20 |
| CN103997043B true CN103997043B (en) | 2017-10-24 |
Family
ID=51311110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410206973.0A Active CN103997043B (en) | 2014-05-15 | 2014-05-15 | A kind of Research on Unified Power Quality Conditioner and its adjusting method based on T-shaped three level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103997043B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104868739B (en) * | 2015-05-13 | 2017-03-15 | 西安西驰电能技术有限公司 | A kind of DC DC switch power supply systems based on three level DC bus |
| CN105471297B (en) * | 2015-12-16 | 2018-04-03 | 北京四方继保自动化股份有限公司 | T-shaped three-level current transformer power model |
| CN105656035B (en) * | 2016-03-01 | 2018-11-30 | 天津中科华瑞电气技术开发有限公司 | A kind of control circuit and method of Unified Power Quality Controller |
| CN106026140B (en) * | 2016-07-13 | 2020-01-03 | 深圳市泰昂能源科技股份有限公司 | Control device and method for three-phase unbalance and reactive compensation |
| CN106786657A (en) * | 2017-01-13 | 2017-05-31 | 珠海万力达电气自动化有限公司 | For the Power Quality Comprehensive Treatment Device of power distribution network |
| CN107240924B (en) * | 2017-07-31 | 2023-08-11 | 南京工程学院 | Neutral point balance circuit control method for three-level inverter |
| CN107741526B (en) * | 2017-10-24 | 2021-01-15 | 江苏大学 | Unified power quality regulator and method for detecting harmonic distortion thereof |
| CN108599607A (en) * | 2018-04-24 | 2018-09-28 | 西安理工大学 | A kind of principal and subordinate's redundancy control method of T-type three-level inverter parallel connection |
| CN109586602B (en) * | 2018-12-19 | 2020-05-08 | 合肥工业大学 | Auxiliary resonant conversion pole T-type three-level soft switching inverter circuit and modulation method |
| CN111509788B (en) * | 2020-04-26 | 2022-08-09 | 太原理工大学 | Improved alternating current-direct current hybrid micro-grid with variable topology and control method thereof |
| CN114024319A (en) * | 2021-11-16 | 2022-02-08 | 国网湖南省电力有限公司 | Three-phase voltage treatment method and system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414205A (en) * | 2013-07-12 | 2013-11-27 | 国家电网公司 | Wind farm super capacitor energy storage type unified power quality conditioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202817792U (en) * | 2012-09-12 | 2013-03-20 | 湖南大学 | Micro-source gird connection and power quality control system |
| CN103066599B (en) * | 2012-12-13 | 2015-04-29 | 清华大学 | Three-phase three-wire system mixed type integrated power system electric energy quality regulator |
-
2014
- 2014-05-15 CN CN201410206973.0A patent/CN103997043B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414205A (en) * | 2013-07-12 | 2013-11-27 | 国家电网公司 | Wind farm super capacitor energy storage type unified power quality conditioner |
Non-Patent Citations (1)
| Title |
|---|
| T型三相三电平整流-逆变***建模与控制研究;王源，徐德鸿;《中国电源学会第二十届学术年会论文集》;20131107;第523页引言至第525页以及图1、图6 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103997043A (en) | 2014-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103997043B (en) | A kind of Research on Unified Power Quality Conditioner and its adjusting method based on T-shaped three level | |
| CN102694460B (en) | Three-phase boost-buck PFC converter | |
| CN105099200B (en) | The double active bridge DC converter exchange phasor analysis of phase shifting control and modeling method | |
| CN104362632B (en) | LADRC-based (linear active disturbance rejection control) compensating current control system of three-level active power filer | |
| CN103166489B (en) | A kind of control circuit of Three-Phase SVPWM Rectifier | |
| CN107093954A (en) | The two-stage type three-phase four-arm inversion system and control strategy boosted with BOOST | |
| CN103972922B (en) | The grid-connected control method adding Repetitive controller is controlled based on modified model quasi-resonance | |
| CN107659130A (en) | A kind of control system and control method of three-phase tri-level VIENNA rectifier | |
| CN106208737A (en) | Model prediction current control method based on third-harmonic zero-sequence voltage matrix converter | |
| CN212850263U (en) | Novel OCC voltage-reducing PFC circuit | |
| CN104868761A (en) | Novel triangular wave comparison control method for three-phase PWM rectifier | |
| CN106849726A (en) | Double droop control methods of three-phase four-leg inverter in parallel under uneven operating mode | |
| CN104638952B (en) | Three phase mains rectifier and its control method and three phase mains frequency converter | |
| CN106130351A (en) | A kind of electric automobile DC charger output voltage ripple suppression system and method | |
| CN111181188B (en) | Improved current double-loop control strategy for back-to-back flexible direct current transmission system | |
| CN203151389U (en) | Control circuit of three-phase high power factor rectifier | |
| CN106992689B (en) | A kind of single-phase direct ac/ac frequency converter and control method based on impulse-equivalent method | |
| CN205622535U (en) | Take rectifier of hysteresis comparison function | |
| CN107221931A (en) | Z-source inverter grid-connected control method based on Active Power Filter-APF | |
| CN112152488A (en) | Three-phase three-level Vienna rectifier control system and control method | |
| CN206517317U (en) | A kind of single-phase grid-connected inverter topological structure | |
| CN111697634B (en) | Modeling method for direct-current voltage control small signal based on alternating-current and direct-current side instantaneous power | |
| CN211959080U (en) | Buck three-phase four-wire three-level PFC rectifier system | |
| CN109301839A (en) | A kind of reactive power compensation technology of parallel energy one-way flow controlled rectifier | |
| CN107395035A (en) | A kind of modulator approach of the Single-phase PWM Rectifier based on discrete-time Lyapunov function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |