CN106936133A - A kind of topological power quality controlling system and its control method - Google Patents
A kind of topological power quality controlling system and its control method Download PDFInfo
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- CN106936133A CN106936133A CN201710301794.9A CN201710301794A CN106936133A CN 106936133 A CN106936133 A CN 106936133A CN 201710301794 A CN201710301794 A CN 201710301794A CN 106936133 A CN106936133 A CN 106936133A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- 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
Abstract
A kind of topological power quality controlling system, in the system and network interface one end is simultaneously connected in single-phase power network, the other end is connected with control system, the function with the interaction of network system real-time power is realized, while for control system provides energy transmission channel voltage acquisition channel；EMC wave filters are serially connected in High frequency filter reactor and simultaneously between network interface, it is ensured that Electro Magnetic Compatibility between device interior and distribution network system；High frequency filter reactor is serially connected between main variable flow loop and EMC wave filters, and realization filters the higher hamonic wave because being produced during HF switch pipe high frequency conversion in main variable flow loop；On the live wire of the single-phase power network of the direct clamping in current transformer one end, the other end is linked into control system, realizes the real time monitoring function to distribution network load electric current；IGBT drives and protection system one end is connected with control system, and the other end is connected with main variable flow loop.The present invention can according to user terminal energy state automatic tracking and compensating, with rapid dynamic response speed, it is easy for installation, quick the features such as.
Description
Technical field
The invention belongs in power system, distribution net side power quality controlling field, in particular to a kind of topological electric energy
Quality controlling system and its control method.
Background technology
Improved constantly with living standards of the people as social economy continues to develop, requirement of the people to the quality of power supply is increasingly
Height is low to user's terminal voltage to pay close attention to higher, the measure of improvement, Related product, dress at present in relevant power system low-voltage network
Put also more, it is overall to solve technology maturation；But the problem high for user's terminal voltage, pays close attention to less, does not correspond to substantially at present
Ripe scheme and measure it is not up to standard come the quality of power supply in solving the problems, such as field of distribution network.According to state's net at different levels with electric unit
Latest requirement on the quality of power supply, for terminal user, no matter voltage is too low or too high does not comply with requirement.Because
The harm for bringing not up to standard of the user terminal quality of power supply is bigger, and some areas even occur causing household electric because the quality of power supply is not up to standard
The phenomenon that device burns, social influence is extremely severe.Therefore actively to implement national rural power policy, " new rural village, new electricity are vigorously implemented
Power, new demand servicing " development strategy, the quality of power supply is not high particularly urgent in solving the problems, such as power distribution network.
The content of the invention
According to the deficiencies in the prior art, the present invention proposes a kind of topological power quality controlling system and its control method, should
System has that integrated level is high, energy consumption is low, it is with strong points, the characteristics of flexibly administer；Can be according to user terminal energy state from motion tracking
Compensation, with rapid dynamic response speed, it is easy for installation, quick the features such as, be capable of achieving not up to standard effective of the user terminal quality of power supply
Administer.Pass through simultaneously and connect with power distribution network user side, real-time tracking, user side is idle, harmonic wave for detection compensation, realizes administering circuit
The problem of upper quality of power supply difference.
The present invention is realized by following technical scheme：
A kind of topological power quality controlling system, including single-phase power network, also including simultaneously network interface, EMC wave filters, High frequency filter electricity
Anti- device, main variable flow loop, control system, current transformer and IGBT drive and protection system；Described and network interface one end simultaneously connects
To in single-phase power network, the other end is connected with control system, realizes the function with the interaction of network system real-time power, while being control
System provides energy transmission channel voltage acquisition channel；The EMC wave filters are serially connected in High frequency filter reactor and and network interface
Between, it is ensured that Electro Magnetic Compatibility between device interior and distribution network system；The High frequency filter reactor is serially connected in main transformer and flows back to
Between road and EMC wave filters, realization filters the higher hamonic wave because being produced during HF switch pipe high frequency conversion in main variable flow loop；Institute
State on the live wire of the single-phase power network of the direct clamping in current transformer one end, the other end is linked into control system, realize to power distribution network
The real time monitoring function of load current；The IGBT drives and protection system one end is connected with control system, the other end and main transformer
Road is flowed back to be connected.
Preferably, the single-phase power network is power distribution network 220V systems.
Preferably, described and network interface includes that the single-phase mains voltage being sequentially connected accesses terminal, breaker, single-phase electricity
Net voltage detecting end；It is 3 pin terminal blocks that the single-phase mains voltage accesses terminal, be respectively connected to single-phase power network a live wire,
One zero line and a ground wire；The single-phase mains voltage test side includes Hall type voltage sensor, and the Hall type voltage is passed
Sensor is PCB welded types, and working power is provided for control system, and its terminal voltage takes from breaker inner side, is realized to power distribution network electricity
The real-time monitoring of pressure.
Preferably, the EMC wave filters are by common mode inductance and safety electric capacity X electric capacity, Y capacitance composition.
Preferably, the High frequency filter reactor is made up of filter inductance and high permeability magnetic core.
Preferably, the main variable flow loop is examined by multiple IGBT modules, DC support electric capacity C and DC voltage, electric current
Examining system is constituted；The multiple IGBT module is included by IGBT module T1, IGBT module T2, IGBT module T3, IGBT module T4
The H bridgings of composition flow back to road and by IGBT module T5, IGBT module T6 constitute can alternating current bypass bridge arm；The H bridgings are flowed back to
Road is to be connected into a branch road and after IGBT module T3, IGBT module T4 are connected into a branch road by IGBT module T1, IGBT module T2
Two bridge arms for composing in parallel, wherein, IGBT module T1, IGBT module T2 and IGBT module T3, IGBT module T4 are connected in series
It is Technics of Power Electronic Conversion output end to locate, and the live wire and zero line of distribution network system are corresponded to respectively；IGBT module T5, IGBT module T6 go here and there
Between the bridge arm being made up of IGBT module T1, IGBT module T2, IGBT module T3, IGBT module T4 is connected across after connecing, by control
IGBT module T5, IGBT module T6 turn on and off energy afterflow passage when realizing H bridge high frequency conversions, realize exporting exchange
Bypass functionality；DC support electric capacity C and the H bridging flows back to road and is connected in parallel, when providing conversion for main variable flow loop topology
Voltage support function.
Preferably, the IGBT module is by high-frequency insulation grid bipolar transistor IGBT and high speed fly-wheel diode group
Into the switching frequency of its high-frequency insulation grid bipolar transistor IGBT is more than 15KHz；The DC support electric capacity C is by multigroup
Electrochemical capacitor or the connection in series-parallel of metal film thin-film capacitor are constituted, and stress levels are up to 900V.
Preferably, the control system by digitial controller DSP unit, modulus collecting unit AD, working power unit,
Output control interface is constituted；The digitial controller DSP unit is C2000DSP and its peripheral circuit composition based on TI companies.
Preferably, the IGBT drives and protection system includes that IGBT driving power supplies, IGBT drive isolation optocoupler, IGBT
Short-circuit protection circuit, IGBT overvoltage crowbars, IGBT thermal-shutdown circuits；A total of four groups of drivings of IGBT driving power supplies
Power supply, be respectively by driving IGBT module T1 power supply I, drive IGBT module T3 power supply II, drive IGBT module T5 and
The power supply III of IGBT module T6, drives the power supply IV of IGBT module T2 and IGBT module T4 to constitute；The driving power supply is+15V
With -10V dual power supplies, power supply I, power supply II, power supply III, power supply IV are mutually isolated.
A kind of control method of topological power quality controlling system, the method is：Distribution network load voltage and power distribution network are negative
Charged current is entered into system by simultaneously network interface with current transformer respectively, control system real-time monitoring distribution network load electric current
With load voltage state, Fast Fourier Transform (FFT) calculating is carried out by its inner high speed calculator, in calculating distribution network system
Required compensating reactive power amount, opening order and opening the duration for road is flowed back to by controlling H bridgings in main variable flow loop, quick to mend
Power distribution network fundamental wave reactive power is repaid, the function to power distribution network Reactive Power Compensation in real time is realized, dynamic DC distribution network electric energy quality is reached
Purpose；H bridgings flow back on road be connected with by IGBT module T5, IGBT module T6 constitute can alternating current bypass bridge arm, by control
System control IGBT module T5 processed, the orderly break-make afterflow of IGBT module T6 so that H bridgings flow back to the modulation of road upstream overcurrent
The forward voltage of switch is reduced to 1/2Vdc by Vdc, reduces the loss of switching tube, and this topological structure uses bipolarity PWM
The output modulation waveform of modulation is consistent using the output waveform that single-polarity PWM is modulated with full-bridge topology, can effectively suppress electric current line
Ripple, reduces the loss on High frequency filter reactor, lifts the conversion efficiency of whole system.
Compared with prior art, the proposition of the invention is connected double winding reactor on distribution network line, that is, hand over
Stream winding and DC control winding.By changing the exciting current of DC control winding, the magnetic field intensity inside inductor is adjusted,
Change the degree of saturation of reactor core, so as to change the dynamic inductance value of exchange winding, finally realize overvoltage on adjusting circuit
Problem.The device can coordinate static reacance generator, and the end quality of power supply that terminal user can be completely administered substantially is not up to standard, too low
Problem so that the terminal voltage of terminal user is round-the-clock to meet the requirement of country and state's net to the quality of power supply.The maximum of the system
Feature, can with most economicalization, most convenient, efficient mode solve power network electricity in the low-voltage network field that is widely present at present
Can quality dissatisfaction, too low problem.
Whole invention system can be the improvement of user terminal electric energy governing problem in field of distribution network provide it is a kind of completely newly
Method, allows distribution network load lateral root according to actual operating mode, auto-adjustment control.Be truly realized it is unattended, precisely regulation control
Effect of reason.To solve power distribution network end because the user side quality of power supply is poor, reactive power consumption big, cause line loss big, transformer is born
Lotus is big, is that terminal electricity consumer brings and brand-new uses electroreception there is provided a kind of brand-new solution pattern the problems such as generate heat serious.Can
For enterprise creates huge economic and social benefit.
The present invention have extremely strong novelty, with integrated level it is high, energy consumption is low, it is with strong points, flexibly administer the characteristics of；Can
According to user terminal energy state automatic tracking and compensating, with rapid dynamic response speed, it is easy for installation, quick the features such as, be capable of achieving
The effective improvement not up to standard of the user terminal quality of power supply.While a kind of topological power quality controlling system of the invention and its control method
Its pass through and connect with power distribution network user side, real-time tracking, user side is idle, harmonic wave for detection compensation, realizes administering electric energy on circuit
Ropy problem.The invention biggest advantage is, in the switching tube of apparatus system AC parallel connection a pair of series, by this two
The afterflow of individual pipe so that the forward voltage of the modulation switch of H bridges upstream overcurrent is reduced to 1/2Vdc by Vdc, reduces out
The loss of pipe is closed, meanwhile, this topological structure uses monopole using the output modulation waveform of bipolarity PWM with full-bridge topology
Property PWM output waveform it is consistent, restrained effectively current ripples, reduce the loss on filter inductance, efficiency high reaches
More than 96.3%.Extremely strong reliability is had based on this topological system, with less investment, the characteristics of return high.Market prospects are wide
Wealthy, social effect is strong.
Brief description of the drawings
Fig. 1 is present system connection diagram；
1-and network interface, 2-EMC wave filters, 3-High frequency filter reactor, 4-main variable flow loop, 5-control system, 6-
Current transformer, 7-single-phase power network, 8-IGBT drives and protection system.
Specific embodiment
Below in conjunction with accompanying drawing, by specific embodiment, the present invention is further illustrated.
As shown in figure 1, a kind of topological power quality controlling system, including single-phase power network 7, also including simultaneously network interface 1, EMC
Wave filter 2, High frequency filter reactor 3, main variable flow loop 4, control system 5, current transformer 6 and IGBT drive and protection system
8；And the one end of network interface 1 and be connected in single-phase power network 7, the other end is connected with control system 5, realizes and network system real-time power
Interactive function, while for control system 5 provides energy transmission channel voltage acquisition channel；EMC wave filters 2 are serially connected in high frequency filter
Between wave reactor 3 and simultaneously network interface 1, it is ensured that Electro Magnetic Compatibility between device interior and distribution network system；High frequency filter reactance
Device 3 is serially connected between main variable flow loop 4 and EMC wave filters 2, and realization is filtered because HF switch pipe high frequency becomes in main variable flow loop 4
The higher hamonic wave produced when changing；On the live wire of the single-phase power network 7 of the direct clamping in the one end of current transformer 6, the other end is linked into control
In system 5, the real time monitoring function to distribution network load electric current is realized；IGBT drives and the one end of protection system 8 and control system 5
It is connected, the other end is connected with main variable flow loop 4.
Single-phase power network 7 is power distribution network 220V systems, near user side.
It is main to include that the single-phase mains voltage being sequentially connected is accessed and network interface 1 is as the input and output side in system
Terminal, breaker, single-phase mains voltage test side；It is 3 pin terminal blocks that wherein single-phase mains voltage accesses terminal, is respectively connected to list
One live wire of phase power network 7, a zero line and a ground wire；Breaker is that possess short circuit and the pyromagnetic de- mouth function of excessively stream；It is single-phase
Network voltage detection end, is mainly made up of Hall type voltage sensor, and wherein Hall type voltage sensor is PCB welded types, work
Make power supply for control system is provided；Terminal voltage takes from breaker inner side；Realize the real-time monitoring to distribution network voltage.And network interface
1 main realization is incorporated into distribution network system in device systems, the function with the interaction of network system real-time power is realized, while being
Apparatus control system provides energy transmission channel voltage acquisition channel.
EMC wave filters 2 are main by common mode inductance and safety electric capacity X electric capacity, Y capacitance composition, it is ensured that device interior and distribution
Net intersystem electromagnetic compatibilit energy.
High frequency filter reactor 3 is mainly made up of filter inductance and high permeability magnetic core, and realization is filtered because of main variable flow loop
The higher hamonic wave produced during interior HF switch pipe high frequency conversion so that major loop export fundamental wave reactive power and watt current it is smoother,
Sinusoidal function.
Main variable flow loop 4 is made up of multiple IGBT modules, DC support electric capacity C and DC voltage, current detecting system；It is many
Individual IGBT module includes that the H bridgings being made up of IGBT module T1, IGBT module T2, IGBT module T3, IGBT module T4 flow back to road
With by IGBT module T5, IGBT module T6 constitute can alternating current bypass bridge arm；It is by IGBT module T1, IGBT that H bridgings flow back to road
Module T2 is connected into a branch road and is connected into two bridge arms composed in parallel after a branch road with IGBT module T3, IGBT module T4, its
In, IGBT module T1, IGBT module T2 and IGBT module T3, IGBT module T4 are connected in series place for Technics of Power Electronic Conversion is exported
End, corresponds to the live wire and zero line of distribution network system respectively；It is connected across by IGBT module after IGBT module T5, IGBT module T6 concatenation
Between T1, IGBT module T2, IGBT module T3, the bridge arm of IGBT module T4 compositions, by controlling IGBT module T5, IGBT module T6
The bypass functionality for turning on and off energy afterflow passage when realizing H bridge high frequency conversions, realizing to exchange output；DC support electricity
Appearance C and H bridgings flow back to road and are connected in parallel, voltage support function when providing conversion for main variable flow loop topology.IGBT module is by height
Frequency insulated gate bipolar transistor IGBT and high speed fly-wheel diode constituted, and its high-frequency insulation grid bipolar transistor IGBT is opened
Pass frequency is more than 15KHz；DC support electric capacity C is made up of multigroup electrochemical capacitor or metal film thin-film capacitor connection in series-parallel, pressure-resistant
Grade is up to 900V.
Control system 5 is by digitial controller DSP unit, modulus collecting unit AD, working power unit, output control interface
Composition；Digitial controller DSP unit is C2000DSP and its peripheral circuit composition based on TI companies.Control system 5 is according to electricity
The real-time current value that current transformer 6 is passed back and the line voltage state value for detecting, are carried out quickly by inner high speed calculator
Fourier transformation is calculated, and calculates compensating reactive power amount needed for distribution network system, by controlling main variable flow loop 4 topology IGBT's
Open order and open the duration, quick compensation network fundamental wave reactive power, realize the function to power network Reactive Power Compensation in real time, reach
The purpose of dynamic DC distribution network electric energy quality.
Current transformer 6 is passive transformer, realizes the real time monitoring function to distribution network load electric current, current transformer
No-load voltage ratio can voluntarily be selected according to place power distribution network capacity.
IGBT drives and protection system 8 includes that IGBT driving power supplies, IGBT drive isolation optocoupler, IGBT short-circuit protections electricity
Road, IGBT overvoltage crowbars, IGBT thermal-shutdown circuits；A total of four groups of driving power supplies of IGBT driving power supplies, be respectively by
The power supply I for driving IGBT module T1, the power supply II for driving IGBT module T3, the power supply for driving IGBT module T5 and IGBT module T6
III, drive the power supply IV of IGBT module T2 and IGBT module T4 to constitute；Driving power supply is+15V and -10V dual power supplies, power supply I, electricity
Source II, power supply III, power supply IV are mutually isolated.
A kind of control method of topological power quality controlling system, the method is：Distribution network load voltage and power distribution network are negative
Charged current is entered into system by simultaneously network interface 1 with current transformer 6 respectively, the real-time monitoring distribution network load of control system 5
Electric current and load voltage state, Fast Fourier Transform (FFT) calculating is carried out by its inner high speed calculator, calculates power distribution network system
Compensating reactive power amount needed for system, opening order and opening the duration for road is flowed back to by controlling H bridgings in main variable flow loop 4,
Quick compensation power distribution network fundamental wave reactive power, realizes the function to power distribution network Reactive Power Compensation in real time, reaches dynamic DC distribution net electric energy
The purpose of quality；H bridgings flow back on road be connected with by IGBT module T5, IGBT module T6 constitute can alternating current bypass bridge arm,
The orderly break-make afterflow of IGBT module T5, IGBT module T6 is controlled by control system 5 so that H bridgings flow back to and electricity is flowed through on road
The forward voltage of the modulation switch of stream is reduced to 1/2Vdc by Vdc, reduces the loss of switching tube, and this topological structure is using double
The output modulation waveform of polarity PWM is consistent using the output waveform that single-polarity PWM is modulated with full-bridge topology, can effectively suppress
Current ripples, reduce the loss on High frequency filter reactor, lift the conversion efficiency of whole system.
Applying on power quality controlling device for novelty of the present invention, can effectively administer distribution network electric energy quality problem
While, the secondary pollution and loss reduced to power network are maximized, it is truly realized and the green of distribution network electric energy quality is administered.
A kind of power quality controlling device of topological power quality controlling system of the invention is installed in a distributed manner, is controlled nearby
The principle of reason so that power quality controlling effect is significant.
A kind of topological power quality controlling system and its control method that the present invention is provided based on another object, it innovates it
Place is that methods described can include simultaneously
(1) by low-voltage network load side, installing the device additional, realize that, to load side reactive-load compensation, power factor is lifted,
The regulatory function of load terminal voltage.
(2) by bypass electronic switch of being increased exchanges in traditional H bridges topology, switching tube own loss, lifting dress are reduced
The efficiency put.
(3) by New Topological power quality controlling device application, can be to the same of power network power quality controlling
When, device is further reduced in itself to the secondary pollution of power network.
Whole invention system can be the improvement of user terminal electric energy governing problem in field of distribution network provide it is a kind of completely newly
Method, allows distribution network load lateral root according to actual operating mode, auto-adjustment control.Be truly realized it is unattended, precisely regulation control
Effect of reason.To solve power distribution network end because the user side quality of power supply is poor, reactive power consumption big, cause line loss big, transformer is born
Lotus is big, is that terminal electricity consumer brings and brand-new uses electroreception there is provided a kind of brand-new solution pattern the problems such as generate heat serious.Can
For enterprise creates huge economic and social benefit.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (10)
1. a kind of topological power quality controlling system, including single-phase power network（7）, it is characterised in that：Also include and network interface（1）、
EMC wave filters（2）, High frequency filter reactor（3）, main variable flow loop（4）, control system（5）, current transformer（6）And IGBT
Drive and protection system（8）；
Described and network interface（1）One end is simultaneously connected to single-phase power network（7）In, the other end and control system（5）It is connected, realizes and power network
The function of system real-time power interaction, while being control system（5）Energy transmission channel voltage acquisition channel is provided；
The EMC wave filters（2）It is serially connected in High frequency filter reactor（3）With simultaneously network interface（1）Between, it is ensured that device interior and match somebody with somebody
Electro Magnetic Compatibility between network system；
The High frequency filter reactor（3）It is serially connected in main variable flow loop（4）With EMC wave filters（2）Between, realization is filtered because of main transformer
Flow back to road（4）The higher hamonic wave produced during interior HF switch pipe high frequency conversion；
The current transformer（6）The single-phase power network of the direct clamping in one end（7）Live wire on, the other end is linked into control system（5）
In, realize the real time monitoring function to distribution network load electric current；
The IGBT drives and protection system（8）One end and control system（5）It is connected, the other end and main variable flow loop（4）It is connected.
2. a kind of topological power quality controlling system according to claim 1, it is characterised in that：The single-phase power network（7）
It is power distribution network 220V systems.
3. a kind of topological power quality controlling system according to claim 1, it is characterised in that：Described and network interface（1）
Single-phase mains voltage including being sequentially connected accesses terminal, breaker, single-phase mains voltage test side；
It is 3 pin terminal blocks that the single-phase mains voltage accesses terminal, is respectively connected to single-phase power network（7）A live wire, one zero
Line and a ground wire；
The single-phase mains voltage test side includes Hall type voltage sensor, and the Hall type voltage sensor is PCB welded types,
Working power is control system（5）There is provided, its terminal voltage takes from breaker inner side, realizes the real-time monitoring to distribution network voltage.
4. a kind of topological power quality controlling system according to claim 1, it is characterised in that：The EMC wave filters（2）
By common mode inductance and safety electric capacity X electric capacity, Y capacitance composition.
5. a kind of topological power quality controlling system according to claim 1, it is characterised in that：The High frequency filter reactance
Device（3）It is made up of filter inductance and high permeability magnetic core.
6. a kind of topological power quality controlling system according to claim 1, it is characterised in that：The main variable flow loop
（4）It is made up of multiple IGBT modules, DC support electric capacity C and DC voltage, current detecting system；
The multiple IGBT module includes the H being made up of IGBT module T1, IGBT module T2, IGBT module T3, IGBT module T4
Bridging flow back to road and by IGBT module T5, IGBT module T6 constitute can alternating current bypass bridge arm；
It is to be connected into a branch road and IGBT module T3, IGBT module by IGBT module T1, IGBT module T2 that the H bridgings flow back to road
T4 is connected into two bridge arms composed in parallel after a branch road, wherein, IGBT module T1, IGBT module T2 and IGBT module T3,
The IGBT module T4 places of being connected in series are Technics of Power Electronic Conversion output end, and the live wire and zero line of distribution network system are corresponded to respectively；
It is connected across by IGBT module T1, IGBT module T2, IGBT module T3, IGBT after IGBT module T5, IGBT module T6 concatenation
Module T4 composition bridge arm between, by control IGBT module T5, IGBT module T6 turn on and off realize H bridge high frequency conversions when
Energy afterflow passage, realizes the bypass functionality to exchange output；
DC support electric capacity C and the H bridging flows back to road and is connected in parallel, voltage support when providing conversion for main variable flow loop topology
Function.
7. a kind of topological power quality controlling system according to claim 6, it is characterised in that：The IGBT module is by height
Frequency insulated gate bipolar transistor IGBT and high speed fly-wheel diode constituted, and its high-frequency insulation grid bipolar transistor IGBT is opened
Pass frequency is more than 15KHz；
The DC support electric capacity C is made up of multigroup electrochemical capacitor or metal film thin-film capacitor connection in series-parallel, and stress levels are up to
900V。
8. a kind of topological power quality controlling system according to claim 1, it is characterised in that：The control system（5）
It is made up of digitial controller DSP unit, modulus collecting unit AD, working power unit, output control interface；
The digitial controller DSP unit is C2000DSP and its peripheral circuit composition based on TI companies.
9. a kind of topological power quality controlling system according to claim 1, it is characterised in that：The IGBT drives and protects
Protecting system（8）Including IGBT driving power supplies, IGBT drive isolation optocoupler, IGBT short-circuit protection circuits, IGBT overvoltage crowbars,
IGBT thermal-shutdown circuits；
A total of four groups of driving power supplies of IGBT driving power supplies, are respectively power supply I, the driving IGBT by driving IGBT module T1
The power supply II of module T3, the power supply III for driving IGBT module T5 and IGBT module T6, drive IGBT module T2 and IGBT module T4
Power supply IV constitute；
The driving power supply is+15V and -10V dual power supplies, and power supply I, power supply II, power supply III, power supply IV are mutually isolated.
10. a kind of control method of the topological power quality controlling system based on described in any one of claim 1 to 9, its feature
It is：Distribution network load voltage and distribution network load electric current are respectively by simultaneously network interface（1）With current transformer（6）Enter into and be
In system, control system（5）Real-time monitoring distribution network load electric current and load voltage state, are carried out by its inner high speed calculator
Fast Fourier Transform (FFT) is calculated, and compensating reactive power amount needed for distribution network system is calculated, by controlling main variable flow loop（4）Middle H
Bridging flows back to opening order and opening the duration for road, and quick compensation power distribution network fundamental wave reactive power is realized to the real-time nothing of power distribution network
The function of work(compensation, reaches the purpose of dynamic DC distribution network electric energy quality；
H bridgings flow back on road be connected with by IGBT module T5, IGBT module T6 constitute can alternating current bypass bridge arm, by control
System（5）Control IGBT module T5, the orderly break-make afterflow of IGBT module T6 so that H bridgings flow back to the tune of road upstream overcurrent
The forward voltage for making switch is reduced to 1/2Vdc by Vdc, reduces the loss of switching tube, and this topological structure uses bipolarity
The output modulation waveform of PWM is consistent using the output waveform that single-polarity PWM is modulated with full-bridge topology, can effectively suppress electric current
Ripple, reduces the loss on High frequency filter reactor, lifts the conversion efficiency of whole system.
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| CN201710301794.9A CN106936133A (en) | 2017-05-02 | 2017-05-02 | A kind of topological power quality controlling system and its control method |
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| CN201710301794.9A Pending CN106936133A (en) | 2017-05-02 | 2017-05-02 | A kind of topological power quality controlling system and its control method |
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