CN106505859A - A kind of small-power bi-directional light stores up current transformer - Google Patents

A kind of small-power bi-directional light stores up current transformer Download PDF

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Publication number
CN106505859A
CN106505859A CN201610958332.XA CN201610958332A CN106505859A CN 106505859 A CN106505859 A CN 106505859A CN 201610958332 A CN201610958332 A CN 201610958332A CN 106505859 A CN106505859 A CN 106505859A
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CN
China
Prior art keywords
switching tube
way
circuits
full
bridge
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Application number
CN201610958332.XA
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Chinese (zh)
Inventor
李志方
许洪华
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Beijing Corona Science and Technology Co Ltd
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Beijing Corona Science and Technology Co Ltd
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Priority to CN201610958332.XA priority Critical patent/CN106505859A/en
Publication of CN106505859A publication Critical patent/CN106505859A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • H02M3/1582Buck-boost converters
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • H02J3/382Dispersed generators the generators exploiting renewable energy
    • H02J3/383Solar energy, e.g. photovoltaic energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/66Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal
    • H02M7/68Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters
    • H02M7/72Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797Conversion of ac power input into dc power output; Conversion of dc power input into ac power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30Systems combining energy storage with energy generation of non-fossil origin

Abstract

A kind of small-power bi-directional light stores up current transformer, and battery and two-way interlock BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit and electrical network form grid-connected charging and discharging circuit.Staggeredly BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit and load are connected battery with two-way successively, form sensitive loads power supply circuits.Staggeredly BUCK/BOOST circuits and battery are sequentially connected for solar panel, photovoltaic input BOOST booster circuits and two-way, form photovoltaic charged circuit.Solar panel, photovoltaic input BOOST booster circuits are with two-way DC/AC full-bridge circuits and off-network switching circuit and electrical network or load are sequentially connected, and form photovoltaic off-network electricity-generating circuit.Central authorities control microprocessor control two-way interlock BUCK/BOOST circuits, two-way DC/DC full-bridge circuits, two-way DC/AC full-bridge circuits, photovoltaic input BOOST booster circuits and and off-network switching circuit, according to the state of electrical network, battery and solar panel, make under the pattern that current transformer is operated in and off-network generates electricity or battery discharging or battery charge.

Description

A kind of small-power bi-directional light stores up current transformer
Technical field
The present invention relates to a kind of light stores up current transformer.
Background technology
Small-power bi-directional light storage current transformer refers mainly to the current transformer of 5kW and 3kW power grades.Small-power bi-directional light stores up unsteady flow Device increased the bidirectional current transformer being connected with battery on the basis of photovoltaic DC-to-AC converter, can achieve photovoltaic generation, battery Energy storage, electric discharge and the function that simultaneously off-network generates electricity, it is achieved that two-way flow of the energy between battery and electrical network;Improve electrical network Receiving ability to distributed photovoltaic power generation, can receive dispatch command, be provided with reactive power according to instruction;Above all Peak valley electric energy can be stabilized with peak load shifting, improve the quality and economic benefit of electrical network.
Small-power bi-directional light storage current transformer has grid-connected and two kinds of operational modes of off-network simultaneously.Under off-network pattern, small-power Bi-directional light is stored up current transformer and remaining electricity can be stored in battery under the premise of the uninterrupted power supply for ensureing sensitive load, The power supply reliability of system is put forward;Under grid-connect mode, it is possible to use energy storage battery carries out peak load shifting, the warp of electrical network is improved Ji benefit.
The Converting Unit of existing bi-directional light storage current transformer is common photovoltaic inverter structure, by BOOST booster circuits and Full bridge inverter etc. is constituted, and Bidirectional variable-flow part adds two-way BUCK/BOOST electricity for the Cuk circuits or full-bridge circuit of single channel Road is constituted;Wherein cuk converter is hard switching pattern, and efficiency comparison is low;Full-bridge circuit add two-way BUCK/BOOST circuits then because Directly charged to battery from full-bridge circuit during charging, cause charging ripple larger or need to increase filter capacitor so as to increasing Cost.
Content of the invention
Small-power bi-directional light proposed by the present invention stores up current transformer using the soft switch technique for being more easy to realize, to improve bi-directional light The efficiency of storage current transformer, reduces battery charging voltage ripple the unsteady flow for reducing being connected with battery using interleaving technique The current stress of circuit, reduces the cost that bi-directional light stores up current transformer.Simultaneously off-network generates electricity integrated photovoltaic of the present invention and battery fills Discharging function, circuit structure are simple, and electronic devices and components quantity is few, work more reliable, and there is low cost, lightweight, volume Little, efficiency high.
The purpose of the present invention is achieved by following technical proposals:
A kind of small-power bi-directional light stores up current transformer, and including two-way, staggeredly BUCK/BOOST circuits, two-way DC/DC full-bridges are electric Road, BUS dc bus, two-way DC/AC full-bridge circuits, photovoltaic input BOOST booster circuits and and off-network switching circuit.Battery Positive pole is connected with the common port of the first multiplexing inductance, the second multiplexing inductance, the first filter capacitor, and battery terminal negative and first is filtered After the common port connection of electric capacity and second switch pipe emitter stage, through two-way DC/DC full-bridge circuits, BUS dc bus, two-way DC/AC full-bridge circuits are connected with electrical network with simultaneously off-network switching circuit;Battery and two-way interlock BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit and electrical network form grid-connected charging and discharging circuit;Battery is interlocked with two-way successively BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit and load connection, form sensitive loads and power electricity Road;Staggeredly BUCK/BOOST circuits and battery are sequentially connected for solar panel, photovoltaic input BOOST booster circuits and two-way Form photovoltaic charged circuit;Solar panel, photovoltaic input BOOST booster circuits are with two-way DC/AC full-bridge circuits and off-network Switching circuit and electrical network or load are sequentially connected, and form photovoltaic off-network electricity-generating circuit.
Central authorities control microprocessor to two-way interlock BUCK/BOOST circuits, two-way DC/DC full-bridge circuits, two-way DC/AC Full-bridge circuit, photovoltaic are input into BOOST booster circuits and simultaneously off-network switching circuit is controlled, according to electrical network, battery, solar energy The state of cell panel, makes under the pattern that current transformer is operated in and off-network generates electricity or battery discharging or battery charge.
Staggeredly BUCK/BOOST circuits form BOOST booster circuits under discharge mode to described two-way, in charge mode Lower formation BUCK reduction voltage circuits.
Described two-way interlock BUCK/BOOST circuits include first switch pipe, second switch pipe, the 3rd switching tube, the 4th Switching tube, the first multiplexing inductance, the second multiplexing inductance and the first filter capacitor, the second electric capacity.The emitter stage of first switch pipe with 4th switch pipe collector connection, first switch pipe and the 4th switching tube combine to form a single bridge arm structure;First multiplexing electricity One end of sense is connected with the emitter stage and the 4th switch pipe collector of first switch pipe, and first is multiplexed the other end of inductance and electric power storage The positive pole connection in pond, the colelctor electrode of first switch pipe are connected with one end of the second electric capacity, and the other end of the second electric capacity is opened with the 4th The emitter stage connection of pipe is closed, battery terminal negative is connected with second switch pipe emitter stage, the 4th switching tube emitter stage, first switch pipe It is connected with the output end of central authorities' control microprocessor with the control end of the 4th switching tube;The emitter stage of the 3rd switching tube is opened with second Close pipe collector connection combination and form a single bridge arm structure, one end of the second multiplexing inductance and the emitter stage of the 3rd switching tube and Second switch pipe collector connects, and the other end of the second multiplexing inductance is connected with the positive pole of battery, the current collection of the 3rd switching tube Pole is connected with the common port of the second electric capacity and the colelctor electrode of first switch pipe, the emitter stage of second switch pipe and the 4th switching tube The control end of the common port connection of emitter stage and the first filter capacitor, the 3rd switching tube and second switch pipe and the micro- place of central authorities' control The output end connection of reason device.
Under discharge mode, high-frequency isolation transformer former limit side switching tube works described two-way DC/DC full-bridge converters Pattern is fixed duty cycle switch motion, secondary side switching tube mode of operation is uncontrollable rectifier pattern;Under charge mode high frequency every From transformer primary avris switching tube mode of operation be uncontrollable rectifier, secondary side switching tube mode of operation be that fixed duty cycle switch is dynamic Make.
Described two-way DC/DC full-bridge converters include that the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th open Guan Guan, the 9th switching tube, the tenth switching tube, the 11st switching tube, twelvemo close pipe, and high-frequency isolation transformer.5th Switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube are combined and to form full bridge structure, are defined as high-frequency isolation transformer Former limit side full-bridge, the 9th switching tube, the tenth switching tube, the 11st switching tube, twelvemo close pipe and combine to form full bridge structure, fixed Justice is high-frequency isolation transformer secondary side full-bridge.
Described two-way DC/AC full-bridge circuits are in inverter mode under discharge mode, are rectification shape under charge mode State.
Described two-way DC/AC full-bridge circuits include the 13rd switching tube, the 14th switching tube, the 15th switching tube, Sixteenmo closes pipe and two filter inductances.Aforementioned four switching tube constitutes full bridge structure, the 13rd switching tube, the 15th switching tube Colelctor electrode is connected to the positive pole of dc bus, and the 14th switching tube, sixteenmo close the emitter stage of pipe and be connected to dc bus Negative pole, one end of the 3rd filter inductance are connected between the emitter stage of the 13rd switching tube and the 14th switch pipe collector, the The other end of three filter inductances is connected with the L poles of the first relay and the common point of the second relay, and the one of the 4th filter inductance End is connected to the emitter stage and sixteenmo of the 15th switching tube and closes between pipe collector, the other end of the 4th filter inductance and the The N poles connection of the common point of one relay and the second relay.
And off-network switching circuit is used for connecting current transformer, electrical network and load, the simultaneously off-network switching of current transformer is realized, by three Relay joins end to end composition, and three relays are drawn by junction, is connected with current transformer, electrical network and load respectively.First after The common point of electrical equipment and the second relay is connected with current transformer, and the common point of the first relay and the 3rd relay is connected with load Connect, the common point of the second relay and the 3rd relay is connected with electrical network.
Photovoltaic input BOOST booster circuits include the 17th switching tube, the first diode, eighteenmo close pipe, the two or two Level pipe, boost inductance and electric capacity, the colelctor electrode of the 17th switching tube combine one list of formation with the anode connection of the second diode Bridge arm structure, eighteenmo close the colelctor electrode of pipe and combine the single bridge arm structure of formation one with the anode connection of the first diode, the One end of six boost inductances is connected between the colelctor electrode pole of the 17th switching tube and the anode of the second diode, the 5th liter of piezoelectricity One end of sense is connected between colelctor electrode pole and the anode of the first diode that eighteenmo closes pipe, and eighteenmo closes the transmitting of pipe Connect electric capacity between the negative electrode of pole and the first diode, the other end of two boost inductances is connected with solar panel respectively.
Description of the drawings
Fig. 1 is the electrical structure diagram of the present invention.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
As shown in figure 1, topological structure of the present invention includes two-way, and staggeredly BUCK/BOOST circuits, high-frequency isolation transformer are two-way DC/DC full-bridge circuits, BUS dc bus, two-way DC/AC full-bridge circuits, photovoltaic input BOOST booster circuits and and off-network switching Circuit.Battery positive voltage is connected with the common port of the first multiplexing inductance, the second multiplexing inductance, the first filter capacitor, storage battery negative Pole be connected with the common port of the first filter capacitor and second switch pipe emitter stage after through two-way DC/DC full-bridge circuits, BUS direct currents Bus, two-way DC/AC full-bridge circuits and and off-network switching circuit be connected with electrical network;Staggeredly BUCK/BOOST is electric with two-way for battery Road, two-way DC/AC full-bridge circuits off-network switching circuit and electrical network form grid-connected charging and discharging circuit;Battery successively with two-way Staggeredly BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit and load connection, form sensitive loads and supply Circuit;Staggeredly BUCK/BOOST circuits and battery be successively for solar panel, photovoltaic input BOOST booster circuits and two-way Connection forms photovoltaic charged circuit;Solar panel, photovoltaic input BOOST booster circuits with two-way DC/AC full-bridge circuits and Off-network switching circuit and electrical network or load are sequentially connected, and form photovoltaic off-network electricity-generating circuit.
Central authorities control microprocessor to two-way interlock BUCK/BOOST circuits, two-way DC/DC full-bridge circuits, two-way DC/AC Full-bridge circuit, photovoltaic are input into BOOST booster circuits and simultaneously off-network switching circuit is controlled, according to electrical network, battery, solar energy The state of cell panel, makes under the pattern that current transformer is operated in and off-network generates electricity or battery discharging or battery charge.
Staggeredly BUCK/BOOST circuits include two-way switching tube half-bridge in parallel to described two-way, and two are connected on half The first multiplexing inductance and the second multiplexing inductance between bridge midpoint and battery positive voltage, one end of the first multiplexing inductance is opened with first Emitter stage and the 4th switch pipe collector connection of pipe is closed, the other end of the first multiplexing inductance is connected with the positive pole of battery, the One end of two multiplexing inductance is connected with the emitter stage and second switch pipe collector of the 3rd switching tube, and second is multiplexed the another of inductance End is connected with the positive pole of battery;Two-way DC/DC full-bridge circuits include being connected in parallel on the full-bridge bridge arm at the second electric capacity two ends, are connected in parallel on The full-bridge bridge arm at the 3rd electric capacity two ends and high-frequency isolation transformer;Photovoltaic input BOOST booster circuits include the 17th switching tube, Eighteenmo closes pipe, the first diode and the second diode, and the 5th boost inductance drawn by bridge arm midpoint and the 6th liter Voltage inductance;Two-way DC/AC full-bridge circuits include the 4th electric capacity for being parallel to BUS dc bus and full-bridge bridge arm and by bridge arm in Point draw the 3rd filter inductance and the 4th filter inductance, phase line through the 3rd filter inductance of AC and the 4th filter inductance, Again by by the first relay, the second relay, the 3rd relay group into simultaneously, off-network switching circuit respectively with electrical network and load Connection.
Staggeredly BUCK/BOOST circuits form BOOST booster circuits under discharge mode to described two-way, in charge mode Lower formation BUCK reduction voltage circuits, two-way interlock BUCK/BOOST circuits be used for discharge mode under battery tension boosting with high frequency every It is implemented in combination with mating with busbar voltage from the boosting of high-frequency isolation transformer no-load voltage ratio, meanwhile, charge mode Down Highway voltage passes through High-frequency isolation transformer with work in the circuit realiration of BUCK patterns and mating for battery tension.In addition, above-mentioned two-way interlocks BUCK/BOOST circuits can also be adjusted because accumulator cell charging and discharging voltage range difference, high-frequency isolation transformer leakage inductance, duty Than the inconsistent of former secondary voltage ratio under the high-frequency isolation transformer charging and discharging state for causing of factor such as losing;Two-way interlocks BUCK/BOOST circuits can also be reduced high-frequency isolation transformer former limit side by way of crisscross parallel and work in the big electricity of low pressure The current stresses of switching tube under stream mode;The two-way two groups of switching tubes of BUCK/BOOST circuits that interlock work in the pattern of interleaved switching Under, the ripple of circuit can be reduced.
Described two-way DC/AC full-bridge circuits include the 13rd switching tube, the 14th switching tube, the 15th switching tube, Sixteenmo closes pipe and two filter inductances.Aforementioned four switching tube constitutes full bridge structure, the 13rd switching tube, the 15th switching tube Colelctor electrode is connected to the positive pole of dc bus, and the 14th switching tube, sixteenmo close the emitter stage of pipe and be connected to dc bus Negative pole, one end of the 3rd filter inductance are connected between the emitter stage of the 13rd switching tube and the 14th switch pipe collector, the The other end of three filter inductances is connected with the L poles of the first relay and the common point of the second relay, and the one of the 4th filter inductance End is connected to the emitter stage and sixteenmo of the 15th switching tube and closes between pipe collector, the other end of the 4th filter inductance and the The N poles connection of the common point of one relay and the second relay.Two-way DC/AC circuits may operate in inverter mode can also work Make in rectification mode, circuit structure is simplified by the multiplexing of circuit, circuit cost is reduced.
And off-network switching circuit by three relay groups into, three relays join end to end, by junction draw respectively with Current transformer, electrical network and load connection.The common point of the first relay and the second relay is connected with two-way DC/AC full-bridge circuits, The common point of the first relay and the 3rd relay is connected with load, the common point and electrical network of the second relay and the 3rd relay Connection.
Above-mentioned and off-network switching circuit is used for connecting current transformer, electrical network and load, realizes the simultaneously off-network switching of current transformer.Become Stream device, electrical network, load are " Δ " type annexation, it is possible to achieve in three ends, any two ends are simplified by a relay connection Circuit structure and reduce and off-network handoff procedure complexity.
Photovoltaic input BOOST booster circuits include the 17th switching tube, the first diode, eighteenmo close pipe, the two or two Level pipe, the 5th boost inductance, the 6th boost inductance and the 5th electric capacity, the sun of the colelctor electrode and the second diode of the 17th switching tube Pole connection combination forms a single bridge arm structure, and eighteenmo closes the colelctor electrode of pipe and combines shape with the anode connection of the first diode Into a single bridge arm structure, one end of the 6th boost inductance is connected to colelctor electrode pole and second diode of the 17th switching tube Between anode, one end of the 5th boost inductance be connected to eighteenmo close the colelctor electrode pole of pipe and the first diode anode it Between, the other end of the 5th boost inductance and the 6th boost inductance is connected with the positive pole of two groups of solar panels respectively, the 5th electricity The emitter stage and eighteenmo of one end of appearance and the 17th switching tube close the common port of the emitter stage of pipe and are connected, the 5th electric capacity another One end is connected with the common port of the negative electrode of the negative electrode and the second diode of the first diode, and the negative pole of two groups of solar panels is equal Emitter stage with the 17th switching tube, eighteenmo close the emitter stage of pipe and are connected., the other end of two boost inductances respectively with too Positive energy cell panel connection.

Claims (7)

1. a kind of small-power bi-directional light stores up current transformer, it is characterised in that:Described bi-directional light storage current transformer includes that two-way interlocks BUCK/BOOST circuits, two-way DC/DC full-bridge circuits, BUS dc bus, two-way DC/AC full-bridge circuits, photovoltaic input BOOST Booster circuit, and and off-network switching circuit;Battery positive voltage and the first multiplexing inductance, the second multiplexing inductance, the first filtered electrical The common port connection of appearance, after battery terminal negative is connected with the common port of the first filter capacitor and second switch pipe emitter stage, warp Two-way DC/DC full-bridge circuits, BUS dc bus, two-way DC/AC full-bridge circuits and and off-network switching circuit be connected with electrical network;Store Battery and two-way interlock BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit and electrical network form grid-connected filling Discharge loop;Battery successively with two-way interlock BUCK/BOOST circuits, two-way DC/AC full-bridge circuits off-network switching circuit With load connection, sensitive loads power supply circuits are formed;Solar panel, photovoltaic input BOOST booster circuits and two-way interlock BUCK/BOOST circuits and battery are in turn connected to form photovoltaic charged circuit;Solar panel, photovoltaic input BOOST boostings Circuit is with two-way DC/AC full-bridge circuits and off-network switching circuit and electrical network or load are sequentially connected, and forms photovoltaic and off-network generates electricity Circuit;Central authorities control microprocessor to two-way interlock BUCK/BOOST circuits, two-way DC/DC full-bridge circuits, two-way DC/AC full-bridges Circuit, photovoltaic are input into BOOST booster circuits and simultaneously off-network switching circuit is controlled, according to electrical network, battery, solar cell The state of plate, makes under the pattern that current transformer is operated in and off-network generates electricity or battery discharging or battery charge.
2. small-power bi-directional light according to claim 1 stores up current transformer, it is characterised in that:Described two-way interlocks BUCK/ BOOST circuits include two-way switching tube half-bridge in parallel, and two the be connected between half-bridge mid point and battery positive voltage One multiplexing inductance and the second multiplexing inductance, one end of the first multiplexing inductance and the emitter stage and the 4th switching tube collection of first switch pipe Electrode connects, and the other end of the first multiplexing inductance is connected with the positive pole of battery, and one end of the second multiplexing inductance is switched with the 3rd The emitter stage of pipe and the connection of second switch pipe collector, the other end of the second multiplexing inductance are connected with the positive pole of battery;Two-way DC/DC full-bridge circuits include the full-bridge bridge arm for being connected in parallel on the second electric capacity two ends, the full-bridge bridge arm for being connected in parallel on the 3rd electric capacity two ends and High-frequency isolation transformer;Photovoltaic input BOOST booster circuits include that the 17th switching tube, eighteenmo close pipe, the first diode With the second diode, and the 5th boost inductance drawn by bridge arm midpoint and the 6th boost inductance;Two-way DC/AC full-bridge circuits Including the 4th electric capacity and full-bridge bridge arm that are parallel to BUS dc bus and the 3rd filter inductance and that is drawn by bridge arm midpoint Four filter inductances, phase line through the 3rd filter inductance of AC and the 4th filter inductance, then pass through by the first relay, second after Electrical equipment, the 3rd relay group into simultaneously, off-network switching circuit respectively with electrical network and load be connected;Described two-way interlocks BUCK/ BOOST circuits form BOOST booster circuits under discharge mode, form BUCK reduction voltage circuits under charge mode.
3. small-power bi-directional light according to claim 1 stores up current transformer, it is characterised in that:Described two-way DC/DC full-bridges Converter include the 5th switching tube, the 6th switching tube, the 7th switching tube, the 8th switching tube, the 9th switching tube, the tenth switching tube, 11st switching tube, twelvemo close pipe, and high-frequency isolation transformer;5th switching tube, the 6th switching tube, the 7th switching tube High-frequency isolation transformer former limit side full-bridge is constituted with the 8th switching tube;9th switching tube, the tenth switching tube, the 11st switching tube and Twelvemo is closed pipe and constitutes high-frequency isolation transformer secondary side full-bridge;Described two-way DC/DC full-bridge circuits under discharge mode, Switching tube mode of operation in high-frequency isolation transformer former limit side is fixed duty cycle switch motion, and secondary side switching tube mode of operation is Uncontrollable rectifier pattern;Under charge mode, switching tube mode of operation in high-frequency isolation transformer former limit side is that uncontrollable rectifier, secondary side are opened It is fixed duty cycle switch motion to close plumber's operation mode.
4. small-power bi-directional light according to claim 1 stores up current transformer, it is characterised in that:Described two-way DC/AC full-bridges Circuit includes that the 13rd switching tube, the 14th switching tube, the 15th switching tube, sixteenmo close pipe and two filter inductances;Institute State the 13rd switching tube, the 14th switching tube, the 15th switching tube, sixteenmo and close pipe composition full bridge structure;13rd switch Pipe, the 15th switch pipe collector are connected to the positive pole of dc bus, and the 14th switching tube, sixteenmo close the emitter stage of pipe and connect The negative pole of dc bus is connected to, one end of the 3rd filter inductance is connected to the emitter stage and the 14th switching tube of the 13rd switching tube Between colelctor electrode, the other end of the 3rd filter inductance is connected with the L poles of the first relay and the common point of the second relay, and the 4th One end of filter inductance is connected to the emitter stage of the 15th switching tube and sixteenmo is closed between pipe collector, the 4th filter inductance The other end be connected with the N poles of the first relay and the common point of the second relay;Described two-way DC/AC full-bridge circuits are being put Inverter mode is under power mode, is rectification state under charge mode.
5. small-power bi-directional light according to claim 1 stores up current transformer, it is characterised in that:Described two-way DC/AC full-bridges In circuit, the 13rd switching tube, the 14th switching tube, the 15th switching tube, sixteenmo close pipe composition full bridge structure, and wherein the 13 switching tubes, the 15th switch pipe collector are connected to the positive pole of dc bus, and the 14th switching tube, sixteenmo close pipe Emitter stage is connected to the negative pole of dc bus;One end of 3rd filter inductance is connected to the emitter stage and the tenth of the 13rd switching tube Between four switch pipe collectors, the L poles of the common point of the other end and the first relay and the second relay of the 3rd filter inductance Connection, one end of the 4th filter inductance are connected between the emitter stage and sixteenmo pass pipe collector of the 15th switching tube, the The other end of four filter inductances is connected with the N poles of the first relay and the common point of the second relay;Described two-way DC/AC is complete Bridge circuit is in inverter mode under discharge mode, is rectification state under charge mode.
6. small-power bi-directional light according to claim 1 stores up current transformer, it is characterised in that:Described photovoltaic input BOOST Booster circuit includes that the 17th switching tube, the first diode, eighteenmo close pipe, the second diode, boost inductance and electric capacity, the The colelctor electrode of 17 switching tubes combines the single bridge arm structure of formation one with the anode connection of the second diode, and eighteenmo closes pipe One list bridge arm structure of formation combine in the anode connection of colelctor electrode and the first diode, and one end of the 6th boost inductance is connected to the Between the colelctor electrode pole of 17 switching tubes and the anode of the second diode, one end of the 5th boost inductance is connected to eighteenmo pass Between the colelctor electrode pole of pipe and the anode of the first diode, eighteenmo is closed between the emitter stage and the negative electrode of the first diode of pipe Connection electric capacity, the other end of two boost inductances are connected with solar panel respectively.
7. small-power bi-directional light according to claim 1 stores up current transformer, it is characterised in that:Described and off-network switching circuit Joined end to end by three relays and constituted, three relays are drawn by junction, be connected with current transformer, electrical network and load respectively; The common point of the first relay and the second relay is connected with current transformer, the common point of the first relay and the 3rd relay with negative The common point for carrying connection, the second relay and the 3rd relay is connected with electrical network.
CN201610958332.XA 2016-11-03 2016-11-03 A kind of small-power bi-directional light stores up current transformer Pending CN106505859A (en)

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CN107017616A (en) * 2017-05-26 2017-08-04 太原理工大学 A kind of voltage stabilizing control method for coordinating of direct-current grid mixed type relaxation terminal
CN107404228A (en) * 2017-09-14 2017-11-28 上海英联电子系统有限公司 A kind of novel wide scope input power translation circuit
CN107947617A (en) * 2017-10-23 2018-04-20 胡炎申 A kind of hybrid switch single-phase inverter
CN107959418A (en) * 2017-11-08 2018-04-24 北京科诺伟业科技股份有限公司 A kind of switching regulator interlocks DC-DC converter
EP3484042A1 (en) * 2017-11-13 2019-05-15 GE Energy Power Conversion Technology Ltd Reconfigurable front end converter for full power energy storage applications
CN108448901A (en) * 2018-04-10 2018-08-24 湖北工业大学 A kind of integrated DC-DC converter topological structure of solar energy electric power supply for coaches system
CN110535173A (en) * 2018-05-25 2019-12-03 阳光电源股份有限公司 A kind of alternating current-direct current mixing photovoltaic electrification energy storage system
CN110535173B (en) * 2018-05-25 2022-02-18 阳光电源股份有限公司 Alternating current-direct current hybrid photovoltaic power generation energy storage system
CN110912165A (en) * 2018-09-14 2020-03-24 日月元科技(深圳)有限公司 Off-grid and on-grid energy storage circuit and control method
CN110086185A (en) * 2019-04-03 2019-08-02 北京新能源汽车股份有限公司 Power-supply system
CN109995128A (en) * 2019-04-24 2019-07-09 无锡尚德益家新能源有限公司 Photovoltaic high-frequency isolation charging circuit and high pressure photovoltaic off-grid power supply system
CN111682617A (en) * 2020-06-22 2020-09-18 深圳市富兰瓦时技术有限公司 Battery charging and discharging circuit
CN112467990A (en) * 2020-11-12 2021-03-09 东南大学 Direct-current power spring topology based on three-active-bridge converter and control method
CN112467990B (en) * 2020-11-12 2022-05-31 东南大学 Direct-current power spring topology based on three-active-bridge converter and control method

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Application publication date: 20170315