CN107221942A - A kind of multinomial energy transfer device and its control method - Google Patents
A kind of multinomial energy transfer device and its control method Download PDFInfo
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- CN107221942A CN107221942A CN201611013390.1A CN201611013390A CN107221942A CN 107221942 A CN107221942 A CN 107221942A CN 201611013390 A CN201611013390 A CN 201611013390A CN 107221942 A CN107221942 A CN 107221942A
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- energy transfer
- transfer device
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The invention discloses a kind of multinomial energy transfer device, including the rectifier filter being connected with power network, rectifier filter is connected to single-phase DC AC modules by DC fuse, single-phase DC AC modules are connected to power network by active filter, output voltage detection unit and output electric current measure unit, single-phase DC AC modules are connected with digital processing unit, and digital processing unit is connected to communication interface circuit and synchronizing signal processing unit.The invention also discloses a kind of control method of multinomial energy transfer device.The invention described above can improve the deficiencies in the prior art, can not only realize energy transfer, and can be adjusted threephase load unbalance condition.
Description
Technical field
The present invention relates to low voltage electric network technical field, especially a kind of multinomial energy transfer device and its control method.
Background technology
The uneven adjusting means of existing low voltage electric network threephase load, is largely the original that reactive-load compensation is carried out using capacitor
Reason realizes the uneven adjusting means of threephase load, and regulation is 10%.Threephase load injustice can carried out in a big way by lacking
Weigh adjusting means, and the uneven adjusting means regulating power of existing threephase load is small, and degree of regulation is low, to improving low-voltage network
The line loss of network is not ideal enough, the use enthusiasm of influence low voltage electric network threephase load imbalance regulation user.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of low voltage electric network energy distributor extremely control method, it can solve
Certainly the deficiencies in the prior art, can not only realize energy transfer, and can be adjusted threephase load unbalance condition.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
A kind of multinomial energy transfer device, including the rectifier filter being connected with power network, rectifier filter are fused by direct current
Device is connected to single-phase DC-AC module, and single-phase DC-AC module passes through active filter, output voltage detection unit and output current
Detection unit is connected to power network, and single-phase DC-AC module is connected with digital processing unit, and digital processing unit is connected to communication interface
Circuit and synchronizing signal processing unit.
Preferably, the digital processing unit is 16 bit DSPs or DSC digital processing units.
A kind of control method of above-mentioned multinomial energy transfer device, the rectifier filter is by the alternating current energy distributed
Direct current energy is converted into, by DC fuse, single-phase DC-AC module is sent by direct current energy, single-phase DC-AC module will be straight
Flow electric energy conversion into AC synchronous signal source phase identical one mutually or two-phase alternating current energy；Alternating current energy is by active
Wave filter, filters out harmful higher harmonic current；Described output voltage detection unit detection output voltage waveforms, it is and synchronous
The waveform of signal processing unit is compared, it is ensured that the waveform of output voltage detection unit and the waveform of synchronizing signal processing unit
Phase just as；The output electric current measure unit detects output current wave, is instructed according to the current data of communication interface circuit,
One phase of control output or the size of current of two-phase alternating current energy, and ensure the tracking of its current waveform and output voltage detection unit
Voltage waveform keep synchronous, when meeting energy transfer grid-connected conditions, synchronous grid-connected signal, energy are sent by communication interface circuit
The AC energy for measuring translator output is grid-connected, in the way of energy distribution is realized in the way of energy transfer, regulation power supply side three-phase
Unbalanced load situation；
The digital processing unit is received control instruction, obtained by synchronizing signal processing unit by communication interface circuit
The phase of synchronizing signal, is then sent out energy transfer device working condition and operational factor；Digital processing unit refers to according to control
Order produces a phase or the two-phase drive signal that only phase DC-AC module needs, and direct current energy is converted into alternating current energy；When
When low voltage power distribution network breaks down, input side power supply and the output lateral load of energy transfer device are cut off, journey is protected into correlation
Sequence.
The beneficial effect brought using above-mentioned technical proposal is：The present invention can will load a phase or two-phase energy gently
Amount is assigned to a phase or two-phase for energy weight, and the balance that the unbalanced load of user is changed into towards distribution transformer circuit is born
Carry.Multiphase energy transfer device, main function is transfer electrical energy amount, using digital processing unit, distributes state to power grid energy in good time
Tracking, is instructed according to energy distributor, in time to the big phase of energy expenditure or two phase transfer energy.It is in parallel whole using three
Wave filter is flowed, can be instructed according to energy distributor, connect wherein one or two rectifier filter, by the energy of distribution by handing over
The form of stream electricity is converted to direct current.Using being heterogeneous output DC-DC converter, direct current is converted to and AC synchronous signal
The phase of phase identical one or two-phase alternating current, realize electric flux energy transfer, adjust threephase load unbalance factor, and reduction low pressure is matched somebody with somebody
The line loss of electric network.
Brief description of the drawings
Fig. 1 is the structure chart of an embodiment of the invention.
In figure：1st, rectifier filter；2nd, DC fuse；3rd, single-phase DC-AC module；4th, active filter；5th, electricity is exported
Press detection unit；6th, output electric current measure unit；7th, digital processing unit；8th, communication interface circuit；9th, synchronizing signal processing unit.
Embodiment
The standardized element used in the present invention can commercially, and shaped piece is according to specification and accompanying drawing
Record can carry out customized, and the specific connected mode of each part is using bolt ripe in the prior art, rivet, weldering
The conventional meanses such as connect, paste, will not be described in detail herein.
Reference picture 1, one embodiment of the present invention includes the rectifier filter 1 being connected with power network, rectifier filter 1
Single-phase DC-AC module 3 is connected to by DC fuse 2, single-phase DC-AC module 3 is examined by active filter 4, output voltage
Survey unit 5 and output electric current measure unit 6 is connected to power network, single-phase DC-AC module 3 is connected with digital processing unit 7, digital processing
Device 7 is connected to communication interface circuit 8 and synchronizing signal processing unit 9.The digital processing unit 7 is 16 bit DSPs or DSC numbers
Word processing device.
A kind of control method of above-mentioned multinomial energy transfer device, the rectifier filter 1 is by the AC energy distributed
Amount is converted into direct current energy, and by DC fuse 2, single-phase DC-AC module 3, single-phase DC-AC module are sent by direct current energy
3 are converted into direct current energy and the phase of AC synchronous signal source phase identical one or two-phase alternating current energy；Alternating current energy is passed through
Active filter 4 is crossed, harmful higher harmonic current is filtered out；The described detection output voltage ripple of output voltage detection unit 5
Shape, is compared with the waveform of synchronizing signal processing unit 9, it is ensured that at the waveform and synchronizing signal of output voltage detection unit 5
Manage unit 9 waveform phase just as；The output electric current measure unit 6 detects output current wave, according to communication interface circuit 8
Current data instruction, control output one mutually or two-phase alternating current can size of current, and ensure its current waveform tracking with
The voltage waveform of output voltage detection unit 5 keeps synchronous, when meeting energy transfer grid-connected conditions, passes through communication interface circuit 8
Synchronous grid-connected signal is sent, the AC energy of energy transfer device output is grid-connected, and energy distribution is realized in the way of energy transfer
Mode, regulation power supply side three-phase imbalance load situation；
The digital processing unit 7 receives control instruction by communication interface circuit 8, is obtained by synchronizing signal processing unit 9
To the phase of synchronizing signal, energy transfer device working condition and operational factor are then sent out；Digital processing unit 7 is according to control
Instruction produces a phase or the two-phase drive signal that only phase DC-AC module 3 needs, and direct current energy is converted into AC energy
Amount；When low voltage power distribution network breaks down, input side power supply and the output lateral load of energy transfer device are cut off, into correlation guarantor
Shield program.
The present invention can not only realize energy transfer, and can be adjusted threephase load unbalance condition, reduction
The line loss of low voltage power distribution network.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (3)
1. a kind of multinomial energy transfer device, it is characterised in that：Including the rectifier filter (1) being connected with power network, rectifier filter
(1) single-phase DC-AC module (3) is connected to by DC fuse (2), single-phase DC-AC module (3) by active filter (4),
Output voltage detection unit (5) and output electric current measure unit (6) are connected to power network, and single-phase DC-AC module (3) is connected with numeral
Processor (7), digital processing unit (7) is connected to communication interface circuit (8) and synchronizing signal processing unit (9).
2. multinomial energy transfer device according to claim 1, it is characterised in that：The digital processing unit (7) is 16 bit DSPs
Or DSC digital processing units.
3. a kind of control method of the multinomial energy transfer device described in claim 1 or 2, it is characterised in that：The rectifying and wave-filtering
The alternating current energy distributed is converted into direct current energy by device (1), and by DC fuse (2), list is sent by direct current energy
Direct current energy is converted into and AC synchronous signal source phase identical one by phase DC-AC module (3), single-phase DC-AC module (3)
Phase or two-phase alternating current energy；Alternating current energy passes through active filter (4), filters out harmful higher harmonic current；Described
Output voltage detection unit (5) detects output voltage waveforms, is compared with the waveform of synchronizing signal processing unit (9), it is ensured that
The waveform of output voltage detection unit (5) and the waveform phase of synchronizing signal processing unit (9) just as；The output electric current measure
Unit (6) detects output current wave, is instructed according to the current data of communication interface circuit (8), a phase of control output or two
The size of current of cross streams electric energy, and ensure that the tracking of its current waveform and the voltage waveform of output voltage detection unit (5) are kept
It is synchronous, when meeting energy transfer grid-connected conditions, synchronous grid-connected signal is sent by communication interface circuit (8), energy transfer device is defeated
The AC energy gone out is grid-connected, in the way of energy distribution is realized in the way of energy transfer, regulation power supply side three-phase imbalance load
Situation；
The digital processing unit (7) is received control instruction, passed through synchronizing signal processing unit (9) by communication interface circuit (8)
The phase of synchronizing signal is obtained, energy transfer device working condition and operational factor is then sent out；Digital processing unit (7) basis
Control instruction produces a phase or the two-phase drive signal that only phase DC-AC module (3) needs, and direct current energy is converted into exchange
Electric flux；When low voltage power distribution network breaks down, input side power supply and the output lateral load of energy transfer device are cut off, into phase
Close defence program.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611013390.1A CN107221942B (en) | 2016-11-18 | 2016-11-18 | Multiphase energy transfer device and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611013390.1A CN107221942B (en) | 2016-11-18 | 2016-11-18 | Multiphase energy transfer device and control method thereof |
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| CN107221942A true CN107221942A (en) | 2017-09-29 |
| CN107221942B CN107221942B (en) | 2020-06-09 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751138A (en) * | 1995-06-22 | 1998-05-12 | University Of Washington | Active power conditioner for reactive and harmonic compensation having PWM and stepped-wave inverters |
| CN101179197A (en) * | 2007-12-03 | 2008-05-14 | 黑龙江中星科技股份有限公司 | Three-phase load automatic equalization device of power distribution network |
| CN101645603A (en) * | 2009-08-31 | 2010-02-10 | 湖南大学 | Negative sequence management method of energy injection type balance electric system |
| CN102832632A (en) * | 2012-09-14 | 2012-12-19 | 重庆大学 | Controllable interphase power transfer method and system |
| CN203086152U (en) * | 2012-12-10 | 2013-07-24 | 北京京泓中电环保科技有限公司 | Three-phase current dynamic balancing device |
| CN105552944A (en) * | 2016-02-26 | 2016-05-04 | 东北大学 | Network system comprising energy storage and energy router and energy adjustment method |
-
2016
- 2016-11-18 CN CN201611013390.1A patent/CN107221942B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751138A (en) * | 1995-06-22 | 1998-05-12 | University Of Washington | Active power conditioner for reactive and harmonic compensation having PWM and stepped-wave inverters |
| CN101179197A (en) * | 2007-12-03 | 2008-05-14 | 黑龙江中星科技股份有限公司 | Three-phase load automatic equalization device of power distribution network |
| CN101645603A (en) * | 2009-08-31 | 2010-02-10 | 湖南大学 | Negative sequence management method of energy injection type balance electric system |
| CN102832632A (en) * | 2012-09-14 | 2012-12-19 | 重庆大学 | Controllable interphase power transfer method and system |
| CN203086152U (en) * | 2012-12-10 | 2013-07-24 | 北京京泓中电环保科技有限公司 | Three-phase current dynamic balancing device |
| CN105552944A (en) * | 2016-02-26 | 2016-05-04 | 东北大学 | Network system comprising energy storage and energy router and energy adjustment method |
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