CN103647281A - Harmonic-wave compensation system based on V2G - Google Patents
Harmonic-wave compensation system based on V2G Download PDFInfo
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- CN103647281A CN103647281A CN201310555335.5A CN201310555335A CN103647281A CN 103647281 A CN103647281 A CN 103647281A CN 201310555335 A CN201310555335 A CN 201310555335A CN 103647281 A CN103647281 A CN 103647281A
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- circuit
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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
Disclosed is a harmonic-wave compensation system based on V2G. The system includes a hardware part and a control part. The hardware part includes a storage battery, a DC/DC circuit, a power conversion circuit, an LC filtering circuit, a single-phase power grid and a load. The control part includes a harmonic-wave extracting controller, a voltage-loop controller, a hysteresis-loop tracking controller and a DC/DC circuit controller. The advantages of the harmonic-wave compensation system based on the V2G are: (1) a V2G technology is used to enable the battery of an electric vehicle to realize power-grid harmonic-wave on-site compensation; (2) a harmonic-wave current detection method is free from effects of power-grid voltage distortion so that instantaneous-value detection of harmonic-wave current can be realized.
Description
Technical field
The present invention relates to a kind of bucking-out system, relate in particular to a kind of harmonic compensation system based on V2G.
Background technology
Along with the progressively increase of energy crisis, automotive engineering is progressively to environmental protection, Energy Conservation, and electric automobile is clean with it, environmental protection, energy-conservation technical advantage are able to fast development.V2G (Vehicle-to-grid) is new ideas that in recent years propose, mainly utilize the storage battery of electric automobile to be connected with electrical network, control energy flows between accumulator of electric car and electrical network, can be by V2G interface to charge in batteries, idle storage battery can be fed back to electrical network by V2G again, for electric power system, can play Peak Load Adjustment, and utilize electric automobile to compensate the regenerative resource of discontinuity, realize the buffering of regenerative resource and electrical network, the fluctuation problem of alleviating regenerative resource, contributes to power system stability.Development along with V2G technology, V2G can have concurrently assistant service functions such as power system reactive power adjusting, harmonic compensations, this contributes to give full play to the function of V2G, but because V2G technology is at present still in conceptual phase, uses it for the rarely seen report of research of the quality of power supply adjusting of electrical network.
Find by prior art documents, " Technique of Compensating Capacitance for Reactive based on V2G " that the people such as Fan Ying deliver in electric power network technique introduced the application of V2G on reactive power compensation, but because electric automobile capacity is less, the DeGrain of reactive power compensation, and the method for this document cannot realize effective reactive power compensation in line voltage distortion situation.With the size of batteries of electric automobile capacity, the local compensation that research V2G realizes a small amount of harmonic wave has great theory significance and using value.
Summary of the invention
The object of the present invention is to provide a kind of harmonic compensation system based on V2G, this bucking-out system is effectively expanded the utility function of V2G, utilizes V2G technology to make accumulator of electric car realize the local compensation of mains by harmonics.
The present invention is achieved like this, it is comprised of hardware components and control section, it is characterized in that: hardware components comprises storage battery, DC/DC circuit, power conversion circuit, LC filter circuit, single-phase electrical network and load, storage battery connects respectively DC/DC circuit, power conversion circuit and LC filter circuit, LC filter circuit connects single-phase electrical network, single-phase electrical network connected load; Control section comprises that harmonic wave extracts controller, Voltage loop controller, hysteresis loop tracking controller and DC/DC circuit controller, and harmonic wave extracts controller detection load harmonic wave, and Voltage loop controller is controlled v
dc2, the signal of hysteresis loop tracking controller power ratio control translation circuit power device, DC/DC circuit controller is controlled DC/DC circuit.
DC/DC circuit of the present invention, comprises power device S1, power device S2, energy storage inductor L1, filter capacitor C1 and filter capacitor C2.
Power conversion circuit of the present invention, the single-phase full bridge circuit being formed by power device S3, power device S4, power device S5, power device S6.
LC filter circuit of the present invention, the circuit being formed by energy storage inductor L2 and filter capacitor C3.
Advantage of the present invention is: (1) utilizes V2G technology to make accumulator of electric car realize the local compensation of mains by harmonics; (2) harmonic current detecting method is not subject to the impact of line voltage distortion, and the instantaneous value that can realize harmonic current detects.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present invention.
Fig. 2 is single-phase harmonic current leaching process figure.
Fig. 3 is the single-phase rectification load current waveform figure of not controlling.
Fig. 4 is the harmonic current that extracts in single-phase not control rectifying circuit and the offset current oscillogram of V2G.
Fig. 5 is power network current oscillogram after V2G harmonic compensation.
In the drawings, 1, storage battery 2, DC/DC circuit 3, power conversion circuit 4, LC filter circuit 5, single-phase electrical network 6, load 7, harmonic wave extract controller 8, Voltage loop controller 9, hysteresis loop tracking controller 10, DC/DC circuit controller.
Embodiment
As shown in Figure 1, the present invention implements like this and works, it is comprised of hardware components and control section, it is characterized in that: hardware components comprises storage battery 1, DC/DC circuit 2, power conversion circuit 3, LC filter circuit 4, single-phase electrical network 5 and load 6, storage battery 1 connects respectively DC/DC circuit 2, power conversion circuit 3 and LC filter circuit 4, LC filter circuit 4 connects single-phase electrical network 5, single-phase electrical network 5 connected loads 6; Control section comprises that harmonic wave extracts controller 7, Voltage loop controller 8, hysteresis loop tracking controller 9 and DC/DC circuit controller 10, and harmonic wave extracts controller 7 detection load 6 harmonic waves, and Voltage loop controller 8 is controlled v
dc2, the signal of hysteresis loop tracking controller 9 power ratio control translation circuit power devices, DC/DC circuit controller 10 is controlled DC/DC circuit 2.
Described storage battery 1 is accumulator of electric car, during charging as electrical appliance, during electric discharge as the device that regulates single-phase electrical network 5 energy.
Described DC/DC circuit 2 is comprised of power device S1, power device S2, energy storage inductor L1, filter capacitor C1, filter capacitor C2, when storage battery 1 S1 work during to single-phase electrical network 5 feedback energy, and S2 work when 1 charging of 5 pairs of storage batterys of single-phase electrical network.
The single-phase full bridge circuit that described power conversion circuit 3 is comprised of power device S3, power device S4, power device S5, power device S6, when storage battery 1 is during to single-phase electrical network 5 feedback energy, power conversion circuit 3 is operated in inverter mode (DC/AC state), when 1 charging of 5 pairs of storage batterys of single-phase electrical network, power conversion circuit 3 is operated in rectification state (AC/DC state).
The circuit that described LC filter circuit 4 is comprised of energy storage inductor L2 and filter capacitor C3, realizes the filtering of the voltage and current of V2G and single-phase electrical network 5 links, and power conversion circuit 3 and LC filter circuit 4 complete the filtering of harmonic wave in load 6 jointly.
Described single-phase electrical network 5 is single phase industrial frequence alternating currents, and while having harmonic wave in load, single-phase electrical network 5 electric currents are distorted.
Described load 6 is harmonic source.
Described harmonic wave extracts the harmonic detecting method in controller 7 detection load 6, first detects the voltage of single-phase electrical network 5, obtains single-phase electrical network 5 voltage-phase information after phase-locked to single-phase electrical network 5 voltages, then, the load current detecting is made as to i
la, by i
latime delay 120 degree and 240 degree fictionalize i respectively
lband i
lc; Then carry out harmonic wave extraction, detailed process provides in Fig. 2: i
la, i
lb, i
lcthe first coordinate transform to α β through abc, α β is to the coordinate transform of dq0, and the signal of d axle and 0 axle is after low-pass filtering, as new d axle and 0 axle output signal, q axle is input as zero, more successively through dq0 to the coordinate transform of α β and α β after the coordinate transform of abc, i
abe i
lafundamental current, i
lawith i
asubtracting each other is the harmonic current i in power network current
lh.
V
dc2voltage loop controller 8 is: set-point V
dc2refwith actual value V
dc2subtract each other the phase-locked information sin θ of synchronizeing with single-phase electrical network 5 again and multiply each other after PI regulates, result and harmonic current i
lhbe added and can be power conversion circuit 3 output current i
ccommand value i
cref, command value i
crefwith actual value i
ccan relatively determine the control signal of power device S3, S4, S5, S6 by hysteresis loop tracking controller 9.
Described DC/DC circuit controller 10 is controlled DC/DC circuit 2, when method is storage battery 1 electric discharge, and discharging current size command value i
dc, refwith actual detected value i
dcsubtract each other through pi regulator, pi regulator is exported divided by cell output voltage v again
dc1obtain duty ratio, through PWM modulation, can control.
Operation principle of the present invention is as follows: load 6 is one not control under the resistance sense loading condition of commutating zone, and Fig. 3 is single-phase while not controlling rectification, and load current waveform contains larger harmonic wave, load current is carried out to harmonic wave extracting method as follows: first fictionalize load current i
laother biphase current i
lband i
lc, after Fig. 2 single-phase harmonic current extracts, obtain harmonic current i
lh, then with outer voltage (set-point v
dc2refwith actual value v
dc2subtract each other after PI regulates and multiply each other with the phase-locked information sin θ of synchronized again) Output rusults be added the instruction current that is V2G, in Fig. 4 (a), provide, the output current that Fig. 4 (b) is V2G, can find out the quick trace command value of output current of V2G; Fig. 5 is power network current after V2G compensation, and power network current harmonic components is eliminated, and when V2G has realized battery charging and discharging, has possessed harmonic filtration function.
In conjunction with above-mentioned, the present invention is by the detection to single-phase line voltage and load current, utilize the method for time delay to carry out virtual to single-phase load electric current, produce other biphase current signals, the phase information that recycles single-phase line voltage is carried out Rotating Transition of Coordinate to three-phase current signal, additional low pass filter is realized the extraction of single-phase electrical network current harmonics, described harmonic wave extracting method is not subject to the impact of line voltage distortion, can realize the extraction to harmonic wave instantaneous value, utilize the feature that batteries of electric automobile capacity is less simultaneously, in V2G, realize harmonic compensation, thereby expanded the utility function of V2G.
Claims (4)
1. the harmonic compensation system based on V2G, it is comprised of hardware components and control section, it is characterized in that: hardware components comprises storage battery, DC/DC circuit, power conversion circuit, LC filter circuit, single-phase electrical network and load, storage battery connects respectively DC/DC circuit, power conversion circuit and LC filter circuit, LC filter circuit connects single-phase electrical network, single-phase electrical network connected load; Control section comprises that harmonic wave extracts controller, Voltage loop controller, hysteresis loop tracking controller and DC/DC circuit controller, and harmonic wave extracts controller detection load harmonic wave, and Voltage loop controller is controlled v
dc2, the signal of hysteresis loop tracking controller power ratio control translation circuit power device, DC/DC circuit controller is controlled DC/DC circuit.
2. a kind of harmonic compensation system based on V2G according to claim 1, is characterized in that: DC/DC circuit comprises power device S1, power device S2, energy storage inductor L1, filter capacitor C1 and filter capacitor C.
3. a kind of harmonic compensation system based on V2G according to claim 1, is characterized in that: the single-phase full bridge circuit that power conversion circuit is comprised of power device S3, power device S4, power device S5 and power device S6.
4. a kind of harmonic compensation system based on V2G according to claim 1, is characterized in that: the circuit that LC filter circuit is comprised of energy storage inductor L2 and filter capacitor C3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310555335.5A CN103647281A (en) | 2013-11-11 | 2013-11-11 | Harmonic-wave compensation system based on V2G |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310555335.5A CN103647281A (en) | 2013-11-11 | 2013-11-11 | Harmonic-wave compensation system based on V2G |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108429458A (en) * | 2018-03-07 | 2018-08-21 | 北京亿华通科技股份有限公司 | A kind of DC booster converter control method |
| CN111869069A (en) * | 2018-01-15 | 2020-10-30 | 金斯顿女王大学 | Power-controlled capacitor circuit and control method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6204630B1 (en) * | 2000-02-04 | 2001-03-20 | Ellen James | Lightweight, compact, on-board, electric vehicle battery charger |
| CN102290815A (en) * | 2011-08-22 | 2011-12-21 | 湖北三环发展股份有限公司 | APF (active power filter) based on coupling inductance |
-
2013
- 2013-11-11 CN CN201310555335.5A patent/CN103647281A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6204630B1 (en) * | 2000-02-04 | 2001-03-20 | Ellen James | Lightweight, compact, on-board, electric vehicle battery charger |
| CN102290815A (en) * | 2011-08-22 | 2011-12-21 | 湖北三环发展股份有限公司 | APF (active power filter) based on coupling inductance |
Non-Patent Citations (1)
| Title |
|---|
| FANYING等: "Bi-directional Converting Technique for Vehicle to Grid", 《IEEE》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111869069A (en) * | 2018-01-15 | 2020-10-30 | 金斯顿女王大学 | Power-controlled capacitor circuit and control method thereof |
| CN108429458A (en) * | 2018-03-07 | 2018-08-21 | 北京亿华通科技股份有限公司 | A kind of DC booster converter control method |
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Application publication date: 20140319 |