CN203632332U - Energy-saving and environment-protecting storage battery forming charging and discharging power supply - Google Patents

Energy-saving and environment-protecting storage battery forming charging and discharging power supply Download PDF

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Publication number
CN203632332U
CN203632332U CN201320842382.3U CN201320842382U CN203632332U CN 203632332 U CN203632332 U CN 203632332U CN 201320842382 U CN201320842382 U CN 201320842382U CN 203632332 U CN203632332 U CN 203632332U
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charge
charging
unit
bus
discharge
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彭正雄
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JIANGSU JINFAN POWER TECHNOLOGY Co Ltd
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JIANGSU JINFAN POWER TECHNOLOGY Co Ltd
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Abstract

The utility model discloses an energy-saving and environment-protecting storage battery forming charging and discharging power supply, which is capable of improving the power factor, reducing harmonic pollution for the power grid, and feeding the spare energy back to the power grid. The energy saving and environment-protecting storage battery forming charging and discharging power supply comprises a power supply transformer, a three-phase reactor, a three-phase PWM reversible rectifier, and a direct current bus unit, wherein the power supply transformer is connected with an input terminal of the three-phase PWM reversible rectifier through the three-phase reactor; an output terminal of the three-phase PWM reversible rectifier is connected with a direct current bus unit; the direct current bus unit is connected with at least a charging and discharging unit; each charging and discharging unit comprises a reversible charging circuit and a discharging circuit; an input terminal of the charging circuit is connected with a positive direct current bus, and an output terminal of the discharging circuit and a negative electrode output terminal of the charging and discharging unit are connected with a negative direct current bus; and an output terminal of the charging circuit is connected with an input terminal of the discharging circuit, and then is connected to a positive electrode output terminal of the charging and discharging unit. The power factor of the energy-saving and environment-protecting storage battery forming charging and discharging power supply is close to 0.99.

Description

A kind of energy saving and environment friendly accumulated electric power source
Technical field
The utility model relates to a kind of charging/discharging apparatus for the production of storage battery, refers more particularly to changing into and discharge and recharge power supply wherein.
Background technology
In the production technology of storage battery, need to be to storage battery repeated charge, this process is called and changes into.As shown in Figure 1, domestic widely used main circuit structure for changing storage battery into charge and discharge, conventionally adopt the rectification thyristor group by six controllable silicon D1~D6 structures, in the output loop of rectification thyristor group, series connection is connected to two groups of contacts of smoothing reactor L and K switch M2, two groups of contacts intersections of K switch M2 are attempted by two groups of contacts of K switch M1, smoothing reactor L is as current filtering element, with level and smooth output current; Its operation principle is: in the time that batteries B is charged, K switch M1 closure, K switch M2 disconnect, and in the time that load storage battery B discharges, K switch M2 closure, K switch M1 disconnect.
Because the major loop that discharges and recharges using is ghyristor circuit structure, when use, can produce following two drawbacks to electrical network: 1. use the power factor of electrical network electric weight lower; 2. can produce harmonic pollution in electric power net to input AC electrical network, and waste a large amount of electric energy.
Certainly, the lower available reactive power compensation of power factor of electrical network electric weight is proofreaied and correct, but, general reactive-load compensation equipment is in improving phasor power factor, can further amplify the harmonic wave of electrical network, electrical network is caused to larger pollution, therefore must use the reactive-load compensation equipment of expensive anti-harmonic wave to proofread and correct.Because multiple charge-discharge circuits may be operated in different operating state (charged state or discharge condition), the electric energy of charging flows to battery from AC network through silicon controlled rectifier, reactor L, K switch M1, when electric discharge, electric energy flows to electrical network from battery through K switch M2, reactor L, silicon controlled rectifier, electric energy exchanges in AC network, so just make that harmonic wave further increases, power factor further reduces, thereby electrical network is caused to severe contamination, and then power consumption equipment is damaged; And harmonic wave can cause the caloric value of supply transformer to increase, and a large amount of electric energy is wasted.
Utility model content
Technical problem to be solved in the utility model is: provide a kind of and improve power factor, reduce harmonic pollution to electrical network, and the energy saving and environment friendly accumulated electric power source of energy-feedback power grid more than needed can be by electric discharge time.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: energy saving and environment friendly accumulated electric power source, comprise: power transformer, three-phase reactor, Three Phase Reversible PWM Rectifier and DC bus unit, the output of power transformer is connected with the input of three-phase reactor, the output of three-phase reactor is connected with the input of Three Phase Reversible PWM Rectifier, the output of Three Phase Reversible PWM Rectifier is connected with DC bus unit, DC bus unit is connected with at least one charge/discharge unit, each charge/discharge unit comprises: a reversible charging circuit and a discharge circuit, the input of charging circuit is connected with positive direct-current bus, the output of discharge circuit is all connected with negative DC bus with the cathode output end of charge/discharge unit, after the output of charging circuit is connected with the input of discharge circuit, be connected to the cathode output end of charge/discharge unit.
The concrete structure of described Three Phase Reversible PWM Rectifier comprises: three pairs of full-control type power electronic modules, every pair of full-control type power electronic module is respectively as upper half rectifying tube and lower half rectifying tube, the emitter of upper half rectifying tube is connected with the collector electrode of lower half rectification module, the collector electrode of all upper half rectifying tubes and connect after be connected with positive direct-current bus, the emitter of all lower half rectifying tubes and connect after be connected with negative DC bus.
Described full-control type power electronic module is that insulated gate bipolar transistor npn npn is IGBT.
Between the output of described charging circuit and the junction of the input of discharge circuit and the cathode output end of charge/discharge unit, be connected in series energy storage inductor.
The primary coil group of described power transformer is that triangular form connects, and secondary coil group is star-like connection.
The beneficial effects of the utility model are: when the each charge/discharge unit in the utility model discharges, give positive and negative DC bus by electric energy feedback, when the electric energy of positive and negative DC bus has more than needed, that is: when the voltage of positive direct-current bus has the trend of rising, the AC energy feedback grid that direct current more than needed is High Power Factor by the inversion of PWM Reversible Rectifiers, for other electric equipment of user, has been saved the energy greatly, and, harmonic pollution to electrical network is very little, has improved power factor.
Accompanying drawing explanation
Fig. 1 is the main circuit structure for changing storage battery into charge and discharge schematic diagram described in background technology.
Fig. 2 is electric theory diagram of the present utility model.
Fig. 3 is part electricity theory structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiments of energy saving and environment friendly accumulated electric power source described in the utility model in detail.
As Fig. 2, shown in Fig. 3, a kind of energy saving and environment friendly accumulated electric power source, comprise: power transformer T1, three-phase reactor L0 and by three couples of IGBT power model Q1 and Q2 as full-control type power electronic module, Q3 and Q4, the Three Phase Reversible PWM Rectifier 3 that Q5 and Q6 form, DC bus unit 4, and by IGBT power tube Q11, the first charge/discharge unit 5 of Q12 composition and by IGBT power tube Q21, the second charge/discharge unit 6 of Q22 composition, wherein, Q1, Q3 and Q5 are upper pipe, Q2, Q4 and Q6 are lower pipe, the three-phase primary coil group of power transformer T1 is that triangular form connects, be connected with electric network source, the three-phase secondary coil group of power transformer T1 is star-like connection, be connected with the inlet wire of three-phase reactor L0 respectively, three outlets of three-phase reactor L0 are connected to respectively the emitter of Q1 and the collector electrode of Q2, the emitter of Q3 and the collector electrode of Q4, the emitter of Q5 and the collector electrode of Q6, Q1, Q3, the collector electrode of Q5 and connect after, be connected with the positive direct-current bus A+ of DC bus unit 4, Q2, Q4, the emitter of Q6 and connect after be connected with the negative DC bus B-of DC bus unit 4, just, bear between DC bus A+ and B-and be connected to multiple charge/discharge units, wherein two is respectively the first charge/discharge unit 5 and the second charge/discharge unit 6, each charge/discharge unit comprises: two IGBT power tubes, that is: the first charge/discharge unit 5 comprises IGBT power tube Q11 and Q12, the second charge/discharge unit 6 comprises IGBT power tube Q21 and Q22, the collector electrode of power tube Q11 and Q21 is connected with positive direct-current bus A+, the emitter of power tube Q12 and Q22, the cathode output end of the first charge/discharge unit 5 and the second charge/discharge unit 6 is connected with negative DC bus B-, the output of each charging circuit connects the cathode output end of charge/discharge unit after being connected with the input of discharge circuit, that is: the emitter of power tube Q11 is connected to the cathode output end of the first charge/discharge unit 5 after being connected with the collector electrode of power tube Q12, the emitter of power tube Q21 is connected to the cathode output end of the second charge/discharge unit 6 after being connected with the collector electrode of power tube Q22.In the present embodiment, between the cathode output end of the junction of the output of charging circuit and the input of discharge circuit and corresponding charge/discharge unit, be also serially connected with energy storage inductor, that is: between the junction of the emitter of power tube Q11 and the collector electrode of Q12 and the positive output terminal of the first charge/discharge unit 5, be provided with energy storage inductor L1, between the junction of the emitter of power tube Q21 and the collector electrode of Q22 and the positive output terminal of the second charge/discharge unit 6, be provided with energy storage inductor L2.In the time of actual fabrication, the control end of Three Phase Reversible PWM Rectifier 3 is that the grid of power tube Q1 to Q6 is by governor circuit control, the grid of power tube Q11 and Q12 is by the first charge-discharge control circuit control, and the grid of power tube Q21 and Q22 is by the second charge-discharge control circuit control.
When practical application, above-mentioned Three Phase Reversible PWM Rectifier also can be selected the full-control type power electronic such as GTR, MOSFET pipe; Described DC bus unit 4 can be connected with multichannel charge/discharge unit, and is not limited to two charge/discharge units in above-mentioned example.Under normal circumstances, under the control of the first charge-discharge control circuit and the second charge-discharge control circuit, the first charge/discharge unit 5 and the second charge/discharge unit 6 are operated under the charge and discharge system cooperatively interacting, that is: when the power tube Q11 in the first charge/discharge unit 5 charges to battery B1, power tube Q22 in the second charge/discharge unit 6 discharges to battery B2, or when the power tube Q12 in the first charge/discharge unit 5 discharges to battery B1, power tube Q21 in the second charge/discharge unit 6 charges to battery B2, and, power tube Q11, Q12, Q21, Q22 is operated under pulse-width modulation (PWM) mode.
Discharge with battery B1 below, battery B2 is charged as example, describe its course of work in detail: in the time that the power tube Q12 in the first charge/discharge unit 5 discharges to battery B1, power tube Q11 is in off state, power tube Q12 works in PWM mode, at power tube Q12 turn-on cycle, power flow energy storage inductor L1 in battery B1, and be stored in energy storage inductor L1, turn-off the cycle at power tube Q12, the electric energy being stored in energy storage inductor L1 flows to positive direct-current bus by the backward diode of power tube Q11, flow to the power tube Q21 in the second charge/discharge unit 6 charging by positive direct-current bus again, turn-on cycle at power tube Q21 charges to battery B2, the second charge/discharge unit 6 is in charging overall process, power tube Q22 is all the time in off state.Like this, the electric energy in the battery B1 in discharge condition is just converted into the electric energy of battery B2, and electric energy is fully utilized between storage battery, rather than directly feeds back to electrical network.Certainly, in charge and discharge process alternately, especially when the above charge/discharge unit in You San road is worked, its electric energy of emitting and the impossible complete equipilibrium of the electric energy that needs input, when the electric energy of DC bus unit 4 has more than needed, that is:, when the voltage of positive direct-current bus has the trend of rising, this electric energy more than needed, by power model conducting in sequence and the cut-off of PWM Reversible Rectifiers 3, reverses direct current other power consumption equipment use of alternating current feedback grid supply user that becomes High Power Factor; In the time that the electric energy of DC bus unit 4 is not enough, be operated under rectification state by Three Phase Reversible PWM Rectifier 3, supplement in time.Power factor of the present utility model approaches 0.99, the harmonic pollution of electrical network is reduced greatly, significantly energy savings.

Claims (5)

1. energy saving and environment friendly accumulated electric power source, comprise: power transformer, three-phase reactor and DC bus unit, it is characterized in that: also include Three Phase Reversible PWM Rectifier, the output of power transformer is connected with the input of three-phase reactor, the output of three-phase reactor is connected with the input of Three Phase Reversible PWM Rectifier, the output of Three Phase Reversible PWM Rectifier is connected with DC bus unit, DC bus unit is connected with at least one charge/discharge unit, each charge/discharge unit comprises: a reversible charging circuit and a discharge circuit, the input of charging circuit is connected with positive direct-current bus, the output of discharge circuit is all connected with negative DC bus with the cathode output end of charge/discharge unit, after the output of charging circuit is connected with the input of discharge circuit, be connected to the cathode output end of charge/discharge unit.
2. energy saving and environment friendly accumulated electric power source according to claim 1, it is characterized in that: the concrete structure of described Three Phase Reversible PWM Rectifier comprises: three pairs of full-control type power electronic modules, every pair of full-control type power electronic module is respectively as upper half rectifying tube and lower half rectifying tube, the emitter of upper half rectifying tube is connected with the collector electrode of lower half rectification module, the collector electrode of all upper half rectifying tubes and connect after be connected with positive direct-current bus, the emitter of all lower half rectifying tubes and connect after be connected with negative DC bus.
3. energy saving and environment friendly accumulated electric power source according to claim 2, is characterized in that: described full-control type power electronic module is that insulated gate bipolar transistor npn npn is IGBT.
4. according to the energy saving and environment friendly accumulated electric power source described in claim 1,2 or 3, it is characterized in that: between the output of described charging circuit and the junction of the input of discharge circuit and the cathode output end of charge/discharge unit, be connected in series energy storage inductor.
5. according to the energy saving and environment friendly accumulated electric power source described in claim 1,2 or 3, it is characterized in that: the primary coil group of described power transformer is that triangular form connects, and secondary coil group is star-like connection.
CN201320842382.3U 2013-12-19 2013-12-19 Energy-saving and environment-protecting storage battery forming charging and discharging power supply Active CN203632332U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103746440A (en) * 2013-12-19 2014-04-23 江苏金帆电源科技有限公司 Energy-saving and environment-friendly type storage battery formation charge and discharge power supply
WO2022120835A1 (en) * 2020-12-11 2022-06-16 杭州铅锂智行科技有限公司 Storage battery formation charging and discharging power supply and formation method therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103746440A (en) * 2013-12-19 2014-04-23 江苏金帆电源科技有限公司 Energy-saving and environment-friendly type storage battery formation charge and discharge power supply
WO2022120835A1 (en) * 2020-12-11 2022-06-16 杭州铅锂智行科技有限公司 Storage battery formation charging and discharging power supply and formation method therefor

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